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annotate progressmeter.c @ 233:225e6822ef53

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author Matt Johnston <matt@ucc.asn.au>
date Tue, 30 Aug 2005 18:00:11 +0000
parents 5c6f9d27ea1c
children b72f98803e46
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #ifdef PROGRESS_METER
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2 /*
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3 * Copyright (c) 2003 Nils Nordman. All rights reserved.
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4 *
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5 * Redistribution and use in source and binary forms, with or without
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6 * modification, are permitted provided that the following conditions
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7 * are met:
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8 * 1. Redistributions of source code must retain the above copyright
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9 * notice, this list of conditions and the following disclaimer.
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10 * 2. Redistributions in binary form must reproduce the above copyright
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11 * notice, this list of conditions and the following disclaimer in the
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12 * documentation and/or other materials provided with the distribution.
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13 *
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14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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24 */
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25
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26 #include "includes.h"
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27 /*RCSID("OpenBSD: progressmeter.c,v 1.15 2003/08/31 12:14:22 markus Exp ");*/
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28
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29 #include "progressmeter.h"
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30 #include "atomicio.h"
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31 #include "scpmisc.h"
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32
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33 #define DEFAULT_WINSIZE 80
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34 #define MAX_WINSIZE 512
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35 #define PADDING 1 /* padding between the progress indicators */
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36 #define UPDATE_INTERVAL 1 /* update the progress meter every second */
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37 #define STALL_TIME 5 /* we're stalled after this many seconds */
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38
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39 /* determines whether we can output to the terminal */
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40 static int can_output(void);
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41
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42 /* formats and inserts the specified size into the given buffer */
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43 static void format_size(char *, int, off_t);
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44 static void format_rate(char *, int, off_t);
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45
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46 /* updates the progressmeter to reflect the current state of the transfer */
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47 void refresh_progress_meter(void);
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48
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49 /* signal handler for updating the progress meter */
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50 static void update_progress_meter(int);
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51
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52 static time_t start; /* start progress */
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53 static time_t last_update; /* last progress update */
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54 static char *file; /* name of the file being transferred */
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55 static off_t end_pos; /* ending position of transfer */
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56 static off_t cur_pos; /* transfer position as of last refresh */
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57 static volatile off_t *counter; /* progress counter */
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58 static long stalled; /* how long we have been stalled */
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59 static int bytes_per_second; /* current speed in bytes per second */
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60 static int win_size; /* terminal window size */
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61
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62 /* units for format_size */
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63 static const char unit[] = " KMGT";
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64
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65 static int
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66 can_output(void)
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67 {
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68 return (getpgrp() == tcgetpgrp(STDOUT_FILENO));
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69 }
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71 static void
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72 format_rate(char *buf, int size, off_t bytes)
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73 {
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74 int i;
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75
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76 bytes *= 100;
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77 for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++)
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78 bytes = (bytes + 512) / 1024;
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79 if (i == 0) {
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80 i++;
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81 bytes = (bytes + 512) / 1024;
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82 }
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83 snprintf(buf, size, "%3lld.%1lld%c%s",
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84 (int64_t) bytes / 100,
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85 (int64_t) (bytes + 5) / 10 % 10,
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86 unit[i],
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87 i ? "B" : " ");
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88 }
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89
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90 static void
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91 format_size(char *buf, int size, off_t bytes)
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92 {
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93 int i;
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94
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95 for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++)
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96 bytes = (bytes + 512) / 1024;
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97 snprintf(buf, size, "%4lld%c%s",
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98 (int64_t) bytes,
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99 unit[i],
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100 i ? "B" : " ");
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101 }
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102
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103 void
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104 refresh_progress_meter(void)
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105 {
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106 char buf[MAX_WINSIZE + 1];
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107 time_t now;
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108 off_t transferred;
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109 double elapsed;
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110 int percent;
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111 int bytes_left;
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112 int cur_speed;
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113 int hours, minutes, seconds;
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114 int i, len;
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115 int file_len;
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116
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117 transferred = *counter - cur_pos;
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118 cur_pos = *counter;
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119 now = time(NULL);
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120 bytes_left = end_pos - cur_pos;
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121
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122 if (bytes_left > 0)
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123 elapsed = now - last_update;
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124 else
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125 elapsed = now - start;
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126
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127 /* calculate speed */
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128 if (elapsed != 0)
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129 cur_speed = (transferred / elapsed);
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130 else
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131 cur_speed = 0;
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132
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133 #define AGE_FACTOR 0.9
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134 if (bytes_per_second != 0) {
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135 bytes_per_second = (bytes_per_second * AGE_FACTOR) +
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136 (cur_speed * (1.0 - AGE_FACTOR));
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137 } else
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138 bytes_per_second = cur_speed;
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139
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140 /* filename */
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141 buf[0] = '\0';
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142 file_len = win_size - 35;
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143 if (file_len > 0) {
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144 len = snprintf(buf, file_len + 1, "\r%s", file);
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145 if (len < 0)
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146 len = 0;
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147 for (i = len; i < file_len; i++ )
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148 buf[i] = ' ';
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149 buf[file_len] = '\0';
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150 }
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151
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152 /* percent of transfer done */
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153 if (end_pos != 0)
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154 percent = ((float)cur_pos / end_pos) * 100;
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155 else
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156 percent = 100;
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157 snprintf(buf + strlen(buf), win_size - strlen(buf),
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158 " %3d%% ", percent);
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159
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160 /* amount transferred */
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161 format_size(buf + strlen(buf), win_size - strlen(buf),
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162 cur_pos);
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163 strlcat(buf, " ", win_size);
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164
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165 /* bandwidth usage */
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166 format_rate(buf + strlen(buf), win_size - strlen(buf),
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167 bytes_per_second);
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168 strlcat(buf, "/s ", win_size);
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169
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170 /* ETA */
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171 if (!transferred)
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172 stalled += elapsed;
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173 else
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174 stalled = 0;
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175
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176 if (stalled >= STALL_TIME)
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177 strlcat(buf, "- stalled -", win_size);
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178 else if (bytes_per_second == 0 && bytes_left)
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179 strlcat(buf, " --:-- ETA", win_size);
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180 else {
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181 if (bytes_left > 0)
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182 seconds = bytes_left / bytes_per_second;
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183 else
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184 seconds = elapsed;
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185
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186 hours = seconds / 3600;
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187 seconds -= hours * 3600;
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188 minutes = seconds / 60;
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189 seconds -= minutes * 60;
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190
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191 if (hours != 0)
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192 snprintf(buf + strlen(buf), win_size - strlen(buf),
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193 "%d:%02d:%02d", hours, minutes, seconds);
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194 else
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195 snprintf(buf + strlen(buf), win_size - strlen(buf),
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196 " %02d:%02d", minutes, seconds);
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197
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198 if (bytes_left > 0)
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199 strlcat(buf, " ETA", win_size);
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200 else
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201 strlcat(buf, " ", win_size);
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202 }
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203
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204 atomicio(vwrite, STDOUT_FILENO, buf, win_size);
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205 last_update = now;
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206 }
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207
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208 static void
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209 update_progress_meter(int ignore)
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210 {
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211 int save_errno;
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212
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213 save_errno = errno;
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214
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215 if (can_output())
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216 refresh_progress_meter();
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217
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218 signal(SIGALRM, update_progress_meter);
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219 alarm(UPDATE_INTERVAL);
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220 errno = save_errno;
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221 }
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222
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223 void
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224 start_progress_meter(char *f, off_t filesize, off_t *stat)
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225 {
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226 struct winsize winsize;
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227
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228 start = last_update = time(NULL);
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229 file = f;
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230 end_pos = filesize;
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231 cur_pos = 0;
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232 counter = stat;
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233 stalled = 0;
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234 bytes_per_second = 0;
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235
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236 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 &&
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237 winsize.ws_col != 0) {
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238 if (winsize.ws_col > MAX_WINSIZE)
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239 win_size = MAX_WINSIZE;
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240 else
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241 win_size = winsize.ws_col;
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242 } else
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243 win_size = DEFAULT_WINSIZE;
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244 win_size += 1; /* trailing \0 */
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245
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246 if (can_output())
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247 refresh_progress_meter();
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248
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249 signal(SIGALRM, update_progress_meter);
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250 alarm(UPDATE_INTERVAL);
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251 }
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252
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253 void
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254 stop_progress_meter(void)
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255 {
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256 alarm(0);
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257
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258 if (!can_output())
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259 return;
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260
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diff changeset
261 /* Ensure we complete the progress */
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262 if (cur_pos != end_pos)
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263 refresh_progress_meter();
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264
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265 atomicio(vwrite, STDOUT_FILENO, "\n", 1);
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266 }
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diff changeset
267 #endif /* PROGRESS_METER */