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comparison svr-chansession.c @ 893:860e3522f8fc

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- Save errno in signal handlers - Use _exit() in segv handler
author Matt Johnston <matt@ucc.asn.au>
date Sat, 15 Feb 2014 21:13:57 +0800
parents aa689d140928
children 5daedffd0769
comparison
equal deleted inserted replaced
892:ae766a2c8fa7 893:860e3522f8fc
85 pid_t pid; 85 pid_t pid;
86 unsigned int i; 86 unsigned int i;
87 struct sigaction sa_chld; 87 struct sigaction sa_chld;
88 struct exitinfo *exit = NULL; 88 struct exitinfo *exit = NULL;
89 89
90 const int saved_errno = errno;
91
90 TRACE(("enter sigchld handler")) 92 TRACE(("enter sigchld handler"))
91 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { 93 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) {
92 TRACE(("sigchld handler: pid %d", pid)) 94 TRACE(("sigchld handler: pid %d", pid))
93 95
94 exit = NULL; 96 exit = NULL;
138 sa_chld.sa_handler = sesssigchild_handler; 140 sa_chld.sa_handler = sesssigchild_handler;
139 sa_chld.sa_flags = SA_NOCLDSTOP; 141 sa_chld.sa_flags = SA_NOCLDSTOP;
140 sigemptyset(&sa_chld.sa_mask); 142 sigemptyset(&sa_chld.sa_mask);
141 sigaction(SIGCHLD, &sa_chld, NULL); 143 sigaction(SIGCHLD, &sa_chld, NULL);
142 TRACE(("leave sigchld handler")) 144 TRACE(("leave sigchld handler"))
145
146 errno = saved_errno;
143 } 147 }
144 148
145 /* send the exit status or the signal causing termination for a session */ 149 /* send the exit status or the signal causing termination for a session */
146 static void send_exitsignalstatus(struct Channel *channel) { 150 static void send_exitsignalstatus(struct Channel *channel) {
147 151