annotate svr-chansession.c @ 33:f789045062e6

Progressing client support
author Matt Johnston <matt@ucc.asn.au>
date Tue, 27 Jul 2004 16:30:46 +0000
parents 469950e86d0f
children b4874d772210
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 #include "includes.h"
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26 #include "packet.h"
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27 #include "buffer.h"
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28 #include "session.h"
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29 #include "dbutil.h"
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30 #include "channel.h"
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31 #include "chansession.h"
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32 #include "sshpty.h"
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33 #include "termcodes.h"
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34 #include "ssh.h"
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35 #include "random.h"
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36 #include "utmp.h"
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37 #include "x11fwd.h"
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38 #include "agentfwd.h"
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39 #include "runopts.h"
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40
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41 /* Handles sessions (either shells or programs) requested by the client */
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42
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43 static int sessioncommand(struct Channel *channel, struct ChanSess *chansess,
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44 int iscmd, int issubsys);
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45 static int sessionpty(struct ChanSess * chansess);
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46 static int sessionsignal(struct ChanSess *chansess);
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47 static int noptycommand(struct Channel *channel, struct ChanSess *chansess);
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48 static int ptycommand(struct Channel *channel, struct ChanSess *chansess);
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49 static int sessionwinchange(struct ChanSess *chansess);
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50 static void execchild(struct ChanSess *chansess);
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51 static void addchildpid(struct ChanSess *chansess, pid_t pid);
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52 static void sesssigchild_handler(int val);
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53 static void closechansess(struct Channel *channel);
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54 static int newchansess(struct Channel *channel);
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55 static void chansessionrequest(struct Channel *channel);
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56
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57 static void send_exitsignalstatus(struct Channel *channel);
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58 static int sesscheckclose(struct Channel *channel);
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59
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60
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61 /* required to clear environment */
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62 extern char** environ;
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63
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64 static int sesscheckclose(struct Channel *channel) {
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65 struct ChanSess *chansess = (struct ChanSess*)channel->typedata;
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66 return chansess->exited;
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67 }
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68
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69 /* handler for childs exiting, store the state for return to the client */
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70 static void sesssigchild_handler(int dummy) {
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71
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72 int status;
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73 pid_t pid;
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74 unsigned int i;
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75 struct ChanSess * chansess;
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76 struct sigaction sa_chld;
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77
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78 TRACE(("enter sigchld handler"));
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79 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
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80
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81 /* find the corresponding chansess */
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82 for (i = 0; i < svr_ses.childpidsize; i++) {
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83 if (svr_ses.childpids[i].pid == pid) {
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84
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85 chansess = svr_ses.childpids[i].chansess;
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86 chansess->exited = 1;
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87 if (WIFEXITED(status)) {
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88 chansess->exitstatus = WEXITSTATUS(status);
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89 }
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90 if (WIFSIGNALED(status)) {
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91 chansess->exitsignal = WTERMSIG(status);
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92 #ifndef AIX
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93 chansess->exitcore = WCOREDUMP(status);
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94 #endif
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95 } else {
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96 /* we use this to determine how pid exited */
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97 chansess->exitsignal = -1;
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98 }
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99 }
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100 }
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101 }
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102 sa_chld.sa_handler = sesssigchild_handler;
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103 sa_chld.sa_flags = SA_NOCLDSTOP;
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104 sigaction(SIGCHLD, &sa_chld, NULL);
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105 TRACE(("leave sigchld handler"));
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106 }
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107
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108 /* send the exit status or the signal causing termination for a session */
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109 /* XXX server */
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110 static void send_exitsignalstatus(struct Channel *channel) {
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111
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112 struct ChanSess *chansess = (struct ChanSess*)channel->typedata;
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113
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114 if (chansess->exited) {
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115 if (chansess->exitsignal > 0) {
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116 send_msg_chansess_exitsignal(channel, chansess);
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117 } else {
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118 send_msg_chansess_exitstatus(channel, chansess);
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119 }
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120 }
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121 }
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122
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123 /* send the exitstatus to the client */
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124 static void send_msg_chansess_exitstatus(struct Channel * channel,
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125 struct ChanSess * chansess) {
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126
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127 assert(chansess->exited);
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128 assert(chansess->exitsignal == -1);
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129
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130 CHECKCLEARTOWRITE();
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131
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132 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
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133 buf_putint(ses.writepayload, channel->remotechan);
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134 buf_putstring(ses.writepayload, "exit-status", 11);
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135 buf_putbyte(ses.writepayload, 0); /* boolean FALSE */
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136 buf_putint(ses.writepayload, chansess->exitstatus);
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137
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138 encrypt_packet();
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139
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140 }
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141
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142 /* send the signal causing the exit to the client */
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143 static void send_msg_chansess_exitsignal(struct Channel * channel,
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144 struct ChanSess * chansess) {
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145
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146 int i;
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147 char* signame = NULL;
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148
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149 assert(chansess->exited);
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150 assert(chansess->exitsignal > 0);
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151
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152 CHECKCLEARTOWRITE();
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153
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154 /* we check that we can match a signal name, otherwise
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155 * don't send anything */
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156 for (i = 0; signames[i].name != NULL; i++) {
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157 if (signames[i].signal == chansess->exitsignal) {
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158 signame = signames[i].name;
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159 break;
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160 }
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161 }
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162
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163 if (signame == NULL) {
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164 return;
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165 }
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166
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167 buf_putbyte(ses.writepayload, SSH_MSG_CHANNEL_REQUEST);
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168 buf_putint(ses.writepayload, channel->remotechan);
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169 buf_putstring(ses.writepayload, "exit-signal", 11);
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170 buf_putbyte(ses.writepayload, 0); /* boolean FALSE */
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171 buf_putstring(ses.writepayload, signame, strlen(signame));
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172 buf_putbyte(ses.writepayload, chansess->exitcore);
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173 buf_putstring(ses.writepayload, "", 0); /* error msg */
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174 buf_putstring(ses.writepayload, "", 0); /* lang */
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175
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176 encrypt_packet();
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177 }
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178
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179 /* set up a session channel */
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ab00ef513e97 Sorted out the first channel init issues.
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180 static int newchansess(struct Channel *channel) {
4
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181
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182 struct ChanSess *chansess;
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183
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184 assert(channel->typedata == NULL);
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185
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186 chansess = (struct ChanSess*)m_malloc(sizeof(struct ChanSess));
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187 chansess->cmd = NULL;
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188 chansess->pid = 0;
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189
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190 /* pty details */
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191 chansess->master = -1;
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192 chansess->slave = -1;
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193 chansess->tty = NULL;
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194 chansess->term = NULL;
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195 chansess->termw = 0;
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196 chansess->termh = 0;
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197 chansess->termc = 0;
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198 chansess->termr = 0;
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199
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200 chansess->exited = 0;
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201
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202 channel->typedata = chansess;
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203
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204 #ifndef DISABLE_X11FWD
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205 chansess->x11listener = NULL;
4
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206 chansess->x11authprot = NULL;
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207 chansess->x11authcookie = NULL;
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208 #endif
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209
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210 #ifndef DISABLE_AGENTFWD
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211 chansess->agentlistener = NULL;
4
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212 chansess->agentfile = NULL;
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213 chansess->agentdir = NULL;
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214 #endif
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215
6
ab00ef513e97 Sorted out the first channel init issues.
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diff changeset
216 return 0;
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217
4
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218 }
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219
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220 /* clean a session channel */
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221 static void closechansess(struct Channel *channel) {
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222
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223 struct ChanSess *chansess;
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224 unsigned int i;
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225 struct logininfo *li;
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226
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227 chansess = (struct ChanSess*)channel->typedata;
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228
7
425ed5c20157 Chantype handling is sorted
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parents: 6
diff changeset
229 send_exitsignalstatus(channel);
4
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230
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231 TRACE(("enter closechansess"));
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232 if (chansess == NULL) {
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233 TRACE(("leave closechansess: chansess == NULL"));
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234 return;
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235 }
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236
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237 m_free(chansess->cmd);
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238 m_free(chansess->term);
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239
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240 if (chansess->tty) {
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241 /* write the utmp/wtmp login record */
33
f789045062e6 Progressing client support
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diff changeset
242 li = login_alloc_entry(chansess->pid, ses.authstate.username,
4
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243 ses.remotehost, chansess->tty);
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244 login_logout(li);
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245 login_free_entry(li);
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246
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247 pty_release(chansess->tty);
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248 m_free(chansess->tty);
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249 }
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250
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251 #ifndef DISABLE_X11FWD
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252 x11cleanup(chansess);
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253 #endif
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254
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255 #ifndef DISABLE_AGENTFWD
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256 agentcleanup(chansess);
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257 #endif
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258
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259 /* clear child pid entries */
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260 for (i = 0; i < svr_ses.childpidsize; i++) {
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261 if (svr_ses.childpids[i].chansess == chansess) {
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262 assert(svr_ses.childpids[i].pid > 0);
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263 TRACE(("closing pid %d", svr_ses.childpids[i].pid));
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264 TRACE(("exited = %d", chansess->exited));
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265 svr_ses.childpids[i].pid = -1;
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266 svr_ses.childpids[i].chansess = NULL;
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267 }
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268 }
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269
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270 m_free(chansess);
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271
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272 TRACE(("leave closechansess"));
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273 }
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274
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275 /* Handle requests for a channel. These can be execution requests,
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276 * or x11/authagent forwarding. These are passed to appropriate handlers */
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277 static void chansessionrequest(struct Channel *channel) {
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278
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279 unsigned char * type;
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280 unsigned int typelen;
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281 unsigned char wantreply;
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282 int ret = 1;
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283 struct ChanSess *chansess;
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284
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285 TRACE(("enter chansessionrequest"));
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286
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287 type = buf_getstring(ses.payload, &typelen);
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288 wantreply = buf_getbyte(ses.payload);
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289
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290 if (typelen > MAX_NAME_LEN) {
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291 TRACE(("leave chansessionrequest: type too long")); /* XXX send error?*/
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parents:
diff changeset
292 goto out;
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parents:
diff changeset
293 }
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294
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295 chansess = (struct ChanSess*)channel->typedata;
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296 assert(chansess != NULL);
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297 TRACE(("type is %s", type));
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298
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299 if (strcmp(type, "window-change") == 0) {
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diff changeset
300 ret = sessionwinchange(chansess);
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parents:
diff changeset
301 } else if (strcmp(type, "shell") == 0) {
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302 ret = sessioncommand(channel, chansess, 0, 0);
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303 } else if (strcmp(type, "pty-req") == 0) {
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diff changeset
304 ret = sessionpty(chansess);
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diff changeset
305 } else if (strcmp(type, "exec") == 0) {
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306 ret = sessioncommand(channel, chansess, 1, 0);
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diff changeset
307 } else if (strcmp(type, "subsystem") == 0) {
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308 ret = sessioncommand(channel, chansess, 1, 1);
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diff changeset
309 #ifndef DISABLE_X11FWD
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310 } else if (strcmp(type, "x11-req") == 0) {
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311 ret = x11req(chansess);
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parents:
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312 #endif
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313 #ifndef DISABLE_AGENTFWD
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314 } else if (strcmp(type, "[email protected]") == 0) {
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315 ret = agentreq(chansess);
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parents:
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316 #endif
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317 } else if (strcmp(type, "signal") == 0) {
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318 ret = sessionsignal(chansess);
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parents:
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319 } else {
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parents:
diff changeset
320 /* etc, todo "env", "subsystem" */
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parents:
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321 }
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322
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parents:
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323 out:
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parents:
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324
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parents:
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325 if (wantreply) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
326 if (ret == 0) {
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327 send_msg_channel_success(channel);
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parents:
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328 } else {
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329 send_msg_channel_failure(channel);
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parents:
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330 }
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parents:
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331 }
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parents:
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332
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333 m_free(type);
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334 TRACE(("leave chansessionrequest"));
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parents:
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335 }
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parents:
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336
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parents:
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337
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parents:
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338 /* Send a signal to a session's process as requested by the client*/
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339 static int sessionsignal(struct ChanSess *chansess) {
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parents:
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340
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parents:
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341 int sig = 0;
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parents:
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342 unsigned char* signame;
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parents:
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343 int i;
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344
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parents:
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345 if (chansess->pid == 0) {
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parents:
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346 /* haven't got a process pid yet */
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347 return DROPBEAR_FAILURE;
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parents:
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348 }
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349
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350 signame = buf_getstring(ses.payload, NULL);
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parents:
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351
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parents:
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352 i = 0;
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Matt Johnston <matt@ucc.asn.au>
parents:
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353 while (signames[i].name != 0) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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354 if (strcmp(signames[i].name, signame) == 0) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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355 sig = signames[i].signal;
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Matt Johnston <matt@ucc.asn.au>
parents:
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356 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
357 }
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parents:
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358 i++;
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parents:
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359 }
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parents:
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360
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parents:
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361 m_free(signame);
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parents:
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362
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
363 if (sig == 0) {
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parents:
diff changeset
364 /* failed */
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parents:
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365 return DROPBEAR_FAILURE;
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parents:
diff changeset
366 }
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parents:
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367
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Matt Johnston <matt@ucc.asn.au>
parents:
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368 if (kill(chansess->pid, sig) < 0) {
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parents:
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369 return DROPBEAR_FAILURE;
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parents:
diff changeset
370 }
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Matt Johnston <matt@ucc.asn.au>
parents:
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371
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parents:
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372 return DROPBEAR_SUCCESS;
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Matt Johnston <matt@ucc.asn.au>
parents:
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373 }
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parents:
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374
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
375 /* Let the process know that the window size has changed, as notified from the
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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376 * client. Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
377 static int sessionwinchange(struct ChanSess *chansess) {
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parents:
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378
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Matt Johnston <matt@ucc.asn.au>
parents:
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379 if (chansess->master < 0) {
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parents:
diff changeset
380 /* haven't got a pty yet */
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parents:
diff changeset
381 return DROPBEAR_FAILURE;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
382 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
383
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
384 chansess->termc = buf_getint(ses.payload);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
385 chansess->termr = buf_getint(ses.payload);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
386 chansess->termw = buf_getint(ses.payload);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
387 chansess->termh = buf_getint(ses.payload);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
388
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
389 pty_change_window_size(chansess->master, chansess->termr, chansess->termc,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
390 chansess->termw, chansess->termh);
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parents:
diff changeset
391
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
392 return DROPBEAR_FAILURE;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
393 }
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
394
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395 /* Set up a session pty which will be used to execute the shell or program.
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
396 * The pty is allocated now, and kept for when the shell/program executes.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
397 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
398 static int sessionpty(struct ChanSess * chansess) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
399
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
400 unsigned int termlen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
401 unsigned char namebuf[65];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
402 struct termios termio;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
403
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
404 TRACE(("enter sessionpty"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
405 chansess->term = buf_getstring(ses.payload, &termlen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
406 if (termlen > MAX_TERM_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
407 /* TODO send disconnect ? */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
408 TRACE(("leave sessionpty: term len too long"));
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
409 return DROPBEAR_FAILURE;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
410 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
411 chansess->termc = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
412 chansess->termr = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
413 chansess->termw = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
414 chansess->termh = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
415
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
416 /* allocate the pty */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
417 assert(chansess->master == -1); /* haven't already got one */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
418 if (pty_allocate(&chansess->master, &chansess->slave, namebuf, 64) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419 TRACE(("leave sessionpty: failed to allocate pty"));
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
420 return DROPBEAR_FAILURE;
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
421 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
422
11
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
423 chansess->tty = (char*)m_strdup(namebuf);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
424 if (!chansess->tty) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
425 dropbear_exit("out of memory"); /* TODO disconnect */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
426 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
427
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
428 pty_setowner(ses.authstate.pw, chansess->tty);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
429 pty_change_window_size(chansess->master, chansess->termr, chansess->termc,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
430 chansess->termw, chansess->termh);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
431
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
432 /* Term modes */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433 /* We'll ignore errors and continue if we can't set modes.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 * We're ignoring baud rates since they seem evil */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435 if (tcgetattr(chansess->master, &termio) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 unsigned char opcode;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437 unsigned int value;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438 const struct TermCode * termcode;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439 unsigned int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
440
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441 len = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
442 if (len != ses.payload->len - ses.payload->pos) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
443 dropbear_exit("bad term mode string");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
444 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
445
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
446 if (len == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
447 TRACE(("empty terminal modes string"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
448 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
449 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
450
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
451 while (((opcode = buf_getbyte(ses.payload)) != 0x00) &&
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
452 opcode <= 159) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
453
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
454 /* must be before checking type, so that value is consumed even if
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
455 * we don't use it */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
456 value = buf_getint(ses.payload);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
457
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
458 /* handle types of code */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
459 if (opcode > MAX_TERMCODE) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
460 continue;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
461 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
462 termcode = &termcodes[(unsigned int)opcode];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
463
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
464
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
465 switch (termcode->type) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
466
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
467 case TERMCODE_NONE:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
468 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
469
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
470 case TERMCODE_CONTROLCHAR:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
471 termio.c_cc[termcode->mapcode] = value;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
472 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
473
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
474 case TERMCODE_INPUT:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 if (value) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
476 termio.c_iflag |= termcode->mapcode;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
477 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
478 termio.c_iflag &= ~(termcode->mapcode);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
479 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
480 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
481
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
482 case TERMCODE_OUTPUT:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
483 if (value) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484 termio.c_oflag |= termcode->mapcode;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
485 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486 termio.c_oflag &= ~(termcode->mapcode);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
488 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
489
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
490 case TERMCODE_LOCAL:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
491 if (value) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492 termio.c_lflag |= termcode->mapcode;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494 termio.c_lflag &= ~(termcode->mapcode);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498 case TERMCODE_CONTROL:
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
499 if (value) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
500 termio.c_cflag |= termcode->mapcode;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
501 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
502 termio.c_cflag &= ~(termcode->mapcode);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
503 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
504 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508 if (tcsetattr(chansess->master, TCSANOW, &termio) < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509 dropbear_log(LOG_INFO, "error setting terminal attributes");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
511 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
512
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
513 TRACE(("leave sessionpty"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
516
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
517 /* Handle a command request from the client. This is used for both shell
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
518 * and command-execution requests, and passes the command to
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
519 * noptycommand or ptycommand as appropriate.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
520 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521 static int sessioncommand(struct Channel *channel, struct ChanSess *chansess,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522 int iscmd, int issubsys) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524 unsigned int cmdlen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
525
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
526 TRACE(("enter sessioncommand"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
527
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528 if (chansess->cmd != NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529 /* TODO - send error - multiple commands? */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
530 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
533 if (iscmd) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
534 /* "exec" */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535 chansess->cmd = buf_getstring(ses.payload, &cmdlen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 if (cmdlen > MAX_CMD_LEN) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
538 /* TODO - send error - too long ? */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541 if (issubsys) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542 #ifdef SFTPSERVER_PATH
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
543 if ((cmdlen == 4) && strncmp(chansess->cmd, "sftp", 4) == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
544 m_free(chansess->cmd);
11
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 9
diff changeset
545 chansess->cmd = m_strdup(SFTPSERVER_PATH);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
546 } else
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
547 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
548 {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
549 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
551 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
553
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
554 if (chansess->term == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
555 /* no pty */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
556 return noptycommand(channel, chansess);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
557 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
558 /* want pty */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
559 return ptycommand(channel, chansess);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
560 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
562
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
563 /* Execute a command and set up redirection of stdin/stdout/stderr without a
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
564 * pty.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
565 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
566 static int noptycommand(struct Channel *channel, struct ChanSess *chansess) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
567
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
568 int infds[2];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
569 int outfds[2];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
570 int errfds[2];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
571 pid_t pid;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
572
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
573 TRACE(("enter noptycommand"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
574
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
575 /* redirect stdin/stdout/stderr */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
576 if (pipe(infds) != 0)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
577 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
578 if (pipe(outfds) != 0)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
579 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
580 if (pipe(errfds) != 0)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
581 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
582
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
583 pid = fork();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
584 if (pid < 0)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
585 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
586
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
587 if (!pid) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
588 /* child */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
589
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
590 /* redirect stdin/stdout */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
591 #define FDIN 0
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
592 #define FDOUT 1
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
593 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) ||
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
594 (dup2(outfds[FDOUT], STDOUT_FILENO) < 0) ||
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
595 (dup2(errfds[FDOUT], STDERR_FILENO) < 0)) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
596 TRACE(("leave noptycommand: error redirecting FDs"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
597 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
598 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
599
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
600 close(infds[FDOUT]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
601 close(infds[FDIN]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
602 close(outfds[FDIN]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
603 close(outfds[FDOUT]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
604 close(errfds[FDIN]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
605 close(errfds[FDOUT]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
606
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
607 execchild(chansess);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
608 /* not reached */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
610 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
611 /* parent */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
612 TRACE(("continue noptycommand: parent"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
613 chansess->pid = pid;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
614
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
615 /* add a child pid */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
616 addchildpid(chansess, pid);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
617
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
618 close(infds[FDIN]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
619 close(outfds[FDOUT]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
620 close(errfds[FDOUT]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
621 channel->infd = infds[FDOUT];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
622 channel->outfd = outfds[FDIN];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
623 channel->errfd = errfds[FDIN];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
624 ses.maxfd = MAX(ses.maxfd, channel->infd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
625 ses.maxfd = MAX(ses.maxfd, channel->outfd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
626 ses.maxfd = MAX(ses.maxfd, channel->errfd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
627
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
628 if ((fcntl(channel->outfd, F_SETFL, O_NONBLOCK) < 0) ||
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
629 (fcntl(channel->infd, F_SETFL, O_NONBLOCK) < 0) ||
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
630 (fcntl(channel->errfd, F_SETFL, O_NONBLOCK) < 0)) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
631 dropbear_exit("Couldn't set nonblocking");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
632 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
633 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
634 #undef FDIN
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
635 #undef FDOUT
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
636
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
637 TRACE(("leave noptycommand"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
638 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
640
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
641 /* Execute a command or shell within a pty environment, and set up
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
642 * redirection as appropriate.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
643 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
644 static int ptycommand(struct Channel *channel, struct ChanSess *chansess) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
645
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
646 pid_t pid;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647 struct logininfo *li;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
648 #ifdef DO_MOTD
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
649 buffer * motdbuf = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
650 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651 struct stat sb;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652 char *hushpath = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
653 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
654
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655 TRACE(("enter ptycommand"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
656
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
657 /* we need to have a pty allocated */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658 if (chansess->master == -1 || chansess->tty == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659 dropbear_log(LOG_WARNING, "no pty was allocated, couldn't execute");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
661 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
662
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
663 pid = fork();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
664 if (pid < 0)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
666
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
667 if (pid == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
668 /* child */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
669
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
670 /* redirect stdin/stdout/stderr */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
671 close(chansess->master);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
672
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
673 pty_make_controlling_tty(&chansess->slave, chansess->tty);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
674
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
675 if ((dup2(chansess->slave, STDIN_FILENO) < 0) ||
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
676 (dup2(chansess->slave, STDERR_FILENO) < 0) ||
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
677 (dup2(chansess->slave, STDOUT_FILENO) < 0)) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 TRACE(("leave ptycommand: error redirecting filedesc"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
679 return DROPBEAR_FAILURE;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
680 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
681
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
682 close(chansess->slave);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
683
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
684 /* write the utmp/wtmp login record - must be after changing the
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
685 * terminal used for stdout with the dup2 above */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
686 li= login_alloc_entry(getpid(), ses.authstate.username,
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
687 ses.remotehost, chansess->tty);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
688 login_login(li);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
689 login_free_entry(li);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
690
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
691 m_free(chansess->tty);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
692
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
693 #ifdef DO_MOTD
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
694 if (svr_opts.domotd) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
695 /* don't show the motd if ~/.hushlogin exists */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
696
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
697 /* 11 == strlen("/hushlogin\0") */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
698 len = strlen(ses.authstate.pw->pw_dir) + 11;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
699
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
700 hushpath = m_malloc(len);
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
701 snprintf(hushpath, len, "%s/hushlogin", ses.authstate.pw->pw_dir);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
702
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
703 if (stat(hushpath, &sb) < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
704 /* more than a screenful is stupid IMHO */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
705 motdbuf = buf_new(80 * 25);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
706 if (buf_readfile(motdbuf, MOTD_FILENAME) == DROPBEAR_SUCCESS) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
707 buf_setpos(motdbuf, 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
708 while (motdbuf->pos != motdbuf->len) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
709 len = motdbuf->len - motdbuf->pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
710 len = write(STDOUT_FILENO,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
711 buf_getptr(motdbuf, len), len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
712 buf_incrpos(motdbuf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
713 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
714 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
715 buf_free(motdbuf);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
716 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
717 m_free(hushpath);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
718 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
719 #endif /* DO_MOTD */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
720
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
721 execchild(chansess);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
722 /* not reached */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
723
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
724 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
725 /* parent */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
726 TRACE(("continue ptycommand: parent"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
727 chansess->pid = pid;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
728
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
729 /* add a child pid */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
730 addchildpid(chansess, pid);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
731
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
732 close(chansess->slave);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
733 channel->infd = chansess->master;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
734 channel->outfd = chansess->master;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
735 /* don't need to set stderr here */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
736 ses.maxfd = MAX(ses.maxfd, chansess->master);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
737
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
738 if (fcntl(chansess->master, F_SETFL, O_NONBLOCK) < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
739 dropbear_exit("Couldn't set nonblocking");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
740 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
741
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
742 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
743
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
744 TRACE(("leave ptycommand"));
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
745 return DROPBEAR_SUCCESS;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
746 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
747
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
748 /* Add the pid of a child to the list for exit-handling */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
749 static void addchildpid(struct ChanSess *chansess, pid_t pid) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
750
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
751 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
752 for (i = 0; i < svr_ses.childpidsize; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
753 if (svr_ses.childpids[i].pid == -1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
754 break;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
755 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
756 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
757
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
758 /* need to increase size */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
759 if (i == svr_ses.childpidsize) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
760 svr_ses.childpids = (struct ChildPid*)m_realloc(svr_ses.childpids,
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
761 sizeof(struct ChildPid) * svr_ses.childpidsize+1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
762 svr_ses.childpidsize++;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
763 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
764
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
765 svr_ses.childpids[i].pid = pid;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
766 svr_ses.childpids[i].chansess = chansess;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
767
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
768 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
769
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
770 /* Clean up, drop to user privileges, set up the environment and execute
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
771 * the command/shell. This function does not return. */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
772 static void execchild(struct ChanSess *chansess) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
773
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
774 char *argv[4];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
775 char * usershell;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
776 char * baseshell;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
777 unsigned int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
778
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
779 /* wipe the hostkey */
24
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
780 sign_key_free(svr_opts.hostkey);
469950e86d0f switching to global vars
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
781 svr_opts.hostkey = NULL;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
782
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
783 /* overwrite the prng state */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
784 seedrandom();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
785
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
786 /* close file descriptors except stdin/stdout/stderr
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787 * Need to be sure FDs are closed here to avoid reading files as root */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
788 for (i = 3; i < (unsigned int)ses.maxfd; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
789 if (m_close(i) == DROPBEAR_FAILURE) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
790 dropbear_exit("Error closing file desc");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
791 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
792 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
793
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
794 /* clear environment */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
795 /* if we're debugging using valgrind etc, we need to keep the LD_PRELOAD
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
796 * etc. This is hazardous, so should only be used for debugging. */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
797 #ifndef DEBUG_VALGRIND
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
798 #ifdef HAVE_CLEARENV
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
799 clearenv();
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
800 #else /* don't HAVE_CLEARENV */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
801 /* Yay for posix. */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
802 if (environ) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
803 environ[0] = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
804 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
805 #endif /* HAVE_CLEARENV */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
806 #endif /* DEBUG_VALGRIND */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
808 /* We can only change uid/gid as root ... */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
809 if (getuid() == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
810
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
811 if ((setgid(ses.authstate.pw->pw_gid) < 0) ||
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
812 (initgroups(ses.authstate.pw->pw_name,
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
813 ses.authstate.pw->pw_gid) < 0) ||
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
814 (setuid(ses.authstate.pw->pw_uid) < 0)) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
815 dropbear_exit("error changing user");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
816 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
818 /* ... but if the daemon is the same uid as the requested uid, we don't
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
819 * need to */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
820
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
821 /* XXX - there is a minor issue here, in that if there are multiple
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
822 * usernames with the same uid, but differing groups, then the
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
823 * differing groups won't be set (as with initgroups()). The solution
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
824 * is for the sysadmin not to give out the UID twice */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
825 if (getuid() != ses.authstate.pw->pw_uid) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
826 dropbear_exit("couldn't change user as non-root");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
827 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
828 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
829
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
830 /* an empty shell should be interpreted as "/bin/sh" */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
831 if (ses.authstate.pw->pw_shell[0] == '\0') {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
832 usershell = "/bin/sh";
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
833 } else {
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
834 usershell = ses.authstate.pw->pw_shell;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
835 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
836
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
837 /* set env vars */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
838 addnewvar("USER", ses.authstate.pw->pw_name);
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
839 addnewvar("LOGNAME", ses.authstate.pw->pw_name);
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
840 addnewvar("HOME", ses.authstate.pw->pw_dir);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
841 addnewvar("SHELL", usershell);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
842 if (chansess->term != NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
843 addnewvar("TERM", chansess->term);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
844 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
845
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
846 /* change directory */
33
f789045062e6 Progressing client support
Matt Johnston <matt@ucc.asn.au>
parents: 24
diff changeset
847 if (chdir(ses.authstate.pw->pw_dir) < 0) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
848 dropbear_exit("error changing directory");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
849 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
850
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
851 #ifndef DISABLE_X11FWD
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
852 /* set up X11 forwarding if enabled */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
853 x11setauth(chansess);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
854 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
855 #ifndef DISABLE_AGENTFWD
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
856 /* set up agent env variable */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
857 agentset(chansess);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
858 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
859
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
860 baseshell = basename(usershell);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
861
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
862 if (chansess->cmd != NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
863 argv[0] = baseshell;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
864 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
865 /* a login shell should be "-bash" for "/bin/bash" etc */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
866 int len = strlen(baseshell) + 2; /* 2 for "-" */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
867 argv[0] = (char*)m_malloc(len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
868 snprintf(argv[0], len, "-%s", baseshell);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
869 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
870
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
871 if (chansess->cmd != NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
872 argv[1] = "-c";
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
873 argv[2] = chansess->cmd;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
874 argv[3] = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
875 } else {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
876 /* construct a shell of the form "-bash" etc */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
877 argv[1] = NULL;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
878 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
879
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
880 execv(usershell, argv);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
881
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
882 /* only reached on error */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
883 dropbear_exit("child failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
884 }
9
7f77962de998 - Reworked non-channel fd handling to listener.c
Matt Johnston <matt@ucc.asn.au>
parents: 7
diff changeset
885
7
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
886 const struct ChanType svrchansess = {
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
887 0, /* sepfds */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
888 "session", /* name */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
889 newchansess, /* inithandler */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
890 sesscheckclose, /* checkclosehandler */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
891 chansessionrequest, /* reqhandler */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
892 closechansess, /* closehandler */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
893 };
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
894
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
895
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
896 /* Set up the general chansession environment, in particular child-exit
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
897 * handling */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
898 void svr_chansessinitialise() {
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
899
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
900 struct sigaction sa_chld;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
901
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
902 /* single child process intially */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
903 svr_ses.childpids = (struct ChildPid*)m_malloc(sizeof(struct ChildPid));
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
904 svr_ses.childpids[0].pid = -1; /* unused */
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
905 svr_ses.childpids[0].chansess = NULL;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
906 svr_ses.childpidsize = 1;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
907 sa_chld.sa_handler = sesssigchild_handler;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
908 sa_chld.sa_flags = SA_NOCLDSTOP;
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
909 if (sigaction(SIGCHLD, &sa_chld, NULL) < 0) {
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
910 dropbear_exit("signal() error");
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
911 }
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
912
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
913 }
425ed5c20157 Chantype handling is sorted
Matt Johnston <matt@ucc.asn.au>
parents: 6
diff changeset
914
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
915 /* add a new environment variable, allocating space for the entry */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
916 void addnewvar(const char* param, const char* var) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
917
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
918 char* newvar;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
919 int plen, vlen;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
920
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
921 plen = strlen(param);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
922 vlen = strlen(var);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
923
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
924 newvar = m_malloc(plen + vlen + 2); /* 2 is for '=' and '\0' */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
925 memcpy(newvar, param, plen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
926 newvar[plen] = '=';
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
927 memcpy(&newvar[plen+1], var, vlen);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
928 newvar[plen+vlen+1] = '\0';
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
929 if (putenv(newvar) < 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
930 dropbear_exit("environ error");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
931 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
932 }