Mercurial > ~mikael > mcabber > hg

annotate mcabber/src/fifo.c @ 1598:a087125d8fc8

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Replace libjabber with loudmouth
author franky
date Sun, 11 Oct 2009 15:38:32 +0200
parents 8c0237c8c186
children dcd5d4c75199
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * fifo.c -- Read commands from a named pipe
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3 *
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4 * Copyright (C) 2008 Mikael Berthe <mikael@lilotux.net>
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5 *
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6 * This program is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or (at
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9 * your option) any later version.
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10 *
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11 * This program is distributed in the hope that it will be useful, but
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12 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 * General Public License for more details.
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15 *
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16 * You should have received a copy of the GNU General Public License
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17 * along with this program; if not, write to the Free Software
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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19 * USA
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20 */
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21
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22 #include <stdio.h>
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23 #include <stdlib.h>
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24 #include <glib.h>
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25 #include <sys/types.h>
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26 #include <sys/stat.h>
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27 #include <fcntl.h>
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28 #include <unistd.h>
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29 #include <sys/time.h>
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30 #include <errno.h>
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31 #include <fcntl.h>
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32
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33 #include "commands.h"
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34 #include "logprint.h"
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35 #include "utils.h"
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36 #include "settings.h"
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37
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38 #include "hbuf.h" // For HBB_BLOCKSIZE
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39
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40 static FILE *sfd;
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41 static char *fifo_name;
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42
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43 static const char *FIFO_ENV_NAME = "MCABBER_FIFO";
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44
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45 // fifo_init(fifo_path)
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46 // Create and open the FIFO file.
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47 // If fifo_path is NULL, reopen the current pipe.
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48 // Return 0 (success) or -1 (failure).
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49 int fifo_init(const char *fifo_path)
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50 {
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51 struct stat buf;
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52 int fd;
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53 char *fifo_path_xp;
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54
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55 if (!sfd && !fifo_path)
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56 return -1; // Nothing to do...
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57
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58 if (sfd && !fifo_path) { // We want to reinitialize the pipe
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59 fclose(sfd);
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60 sfd = NULL;
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61 if (fifo_name)
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62 goto fifo_init_open;
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63 }
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64 sfd = NULL;
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65
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66 fifo_path_xp = expand_filename(fifo_path);
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67
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68 if (!stat(fifo_path_xp, &buf)) {
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69 if (!S_ISFIFO(buf.st_mode)) {
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70 scr_LogPrint(LPRINT_LOGNORM, "WARNING: Cannot create the FIFO. "
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71 "%s already exists and is not a pipe", fifo_path_xp);
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72 g_free(fifo_path_xp);
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73 return -1;
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74 }
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75
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76 if (unlink(fifo_path_xp)) {
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77 scr_LogPrint(LPRINT_LOGNORM, "WARNING: Unable to unlink FIFO %s [%s]",
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78 fifo_path_xp, g_strerror(errno));
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79 g_free(fifo_path_xp);
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80 return -1;
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81 }
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82 }
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83
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84 if (mkfifo(fifo_path_xp, S_IWUSR | S_IRUSR)) {
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85 scr_LogPrint(LPRINT_LOGNORM, "WARNING: Cannot create the FIFO [%s]",
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86 g_strerror(errno));
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87 g_free(fifo_path_xp);
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88 return -1;
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89 }
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90
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91 fifo_name = fifo_path_xp;
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92
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93 fifo_init_open:
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94 fd = open(fifo_name, O_RDONLY | O_NONBLOCK);
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95 if (!fd)
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96 return -1;
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97
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98 setenv(FIFO_ENV_NAME, fifo_name, 1);
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99
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100 sfd = fdopen(fd, "r");
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101 if (fifo_path)
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102 scr_LogPrint(LPRINT_LOGNORM, "FIFO initialized (%s)", fifo_name);
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103 return 0;
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104 }
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105
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106 // fifo_deinit()
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107 // Close the current FIFO pipe and delete it.
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108 void fifo_deinit(void)
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109 {
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110 unsetenv(FIFO_ENV_NAME);
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111 if (sfd) {
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112 fclose(sfd);
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113 sfd = NULL;
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114 }
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115 if (fifo_name) {
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116 unlink(fifo_name);
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117 g_free(fifo_name);
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118 fifo_name = NULL;
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119 }
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120 }
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121
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122 // fifo_read()
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123 // Read a line from the FIFO pipe (if available), and execute it.
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124 void fifo_read(void)
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125 {
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126 struct timeval tv;
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127 fd_set fds;
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128 char *getbuf;
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129 char buf[HBB_BLOCKSIZE+1];
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130 int fd;
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131
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132 if (!sfd) {
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133 return;
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134 }
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135
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136 tv.tv_sec = 0;
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137 tv.tv_usec = 0;
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138
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139 fd = fileno(sfd);
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140
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141 FD_ZERO(&fds);
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142 FD_SET(fd, &fds);
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143
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144 select(fd + 1, &fds, NULL, NULL, &tv);
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145
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146 if (!FD_ISSET(fd, &fds)) {
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147 return;
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148 }
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149
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150 getbuf = fgets(buf, HBB_BLOCKSIZE, sfd);
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151 if (getbuf) {
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152 guint logflag;
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153 char *eol = buf;
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154 guint fifo_ignore = settings_opt_get_int("fifo_ignore");
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155
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156 // Strip trailing newlines
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157 for ( ; *eol ; eol++)
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158 ;
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159 if (eol > buf)
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160 eol--;
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161 while (eol > buf && *eol == '\n')
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162 *eol-- = 0;
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163
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164 if (settings_opt_get_int("fifo_hide_commands"))
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165 logflag = LPRINT_LOG;
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166 else
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167 logflag = LPRINT_LOGNORM;
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168 scr_LogPrint(logflag, "%s FIFO command: %s",
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169 (fifo_ignore ? "Ignoring" : "Executing"), buf);
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170 if (!fifo_ignore) {
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171 if (process_command(buf, TRUE) == 255)
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172 mcabber_set_terminate_ui();
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173 }
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174 } else {
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175 if (feof(sfd))
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176 fifo_init(NULL); // Reopen the FIFO on EOF
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177 }
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178 }
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179
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180 // fifo_get_fd()
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181 // Return the FIFO file descriptor (-1 if none).
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182 int fifo_get_fd(void)
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183 {
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184 if (sfd)
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185 return fileno(sfd);
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186 return -1;
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187 }
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188
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189 /* vim: set expandtab cindent cinoptions=>2\:2(0: For Vim users... */