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1 /* MasqMail
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2 Copyright (C) 1999-2001 Oliver Kurth
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3 Copyright (C) 2008 markus schnalke <meillo@marmaro.de>
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 2 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software
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17 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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18 */
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19
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20 #include <sys/stat.h>
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21 #include <sys/wait.h>
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22
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23 #include "masqmail.h"
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24 #include "peopen.h"
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25
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26 gchar *connection_name;
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27
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28 void
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29 set_online_name(gchar * name)
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30 {
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31 connection_name = g_strdup(name);
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32 }
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33
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34 static gchar*
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35 detect_online_pipe(const gchar * pipe)
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36 {
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37 pid_t pid;
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38 void (*old_signal) (int);
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39 int status;
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40 FILE *in;
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41 gchar *name = NULL;
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42
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43 old_signal = signal(SIGCHLD, SIG_DFL);
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44
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45 in = peopen(pipe, "r", environ, &pid);
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46 if (in == NULL) {
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47 logwrite(LOG_ALERT, "could not open pipe '%s': %s\n", pipe, strerror(errno));
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48 signal(SIGCHLD, old_signal);
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49 return NULL;
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50 }
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51
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52 gchar output[256];
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53 if (fgets(output, 255, in)) {
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54 g_strchomp(g_strchug(output));
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55 if (strlen(output) == 0) {
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56 logwrite(LOG_ALERT, "only whitespace connection name\n");
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57 name = NULL;
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58 } else {
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59 name = g_strdup(output);
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60 }
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61 } else {
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62 logwrite(LOG_ALERT, "nothing read from pipe %s\n", pipe);
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63 name = NULL;
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64 }
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65 fclose(in);
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66 waitpid(pid, &status, 0);
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67 if (WEXITSTATUS(status) != EXIT_SUCCESS) {
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68 g_free(name);
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69 name = NULL;
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70 }
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71
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72 signal(SIGCHLD, old_signal);
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73
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74 return name;
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75 }
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76
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77 gchar*
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78 detect_online()
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79 {
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80 if (conf.online_detect == NULL) {
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81 return NULL;
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82 }
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83
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84 if (strcmp(conf.online_detect, "file") == 0) {
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85 DEBUG(3) debugf("online detection method 'file'\n");
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86 if (conf.online_file == NULL) {
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87 logwrite(LOG_ALERT, "online detection mode is 'file', but online_file is undefined\n");
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88 return NULL;
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89 }
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90
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91 struct stat st;
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92 if (stat(conf.online_file, &st) == 0) {
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93 FILE *fptr = fopen(conf.online_file, "r");
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94 if (!fptr) {
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95 logwrite(LOG_ALERT, "opening of %s failed: %s\n", conf.online_file, strerror(errno));
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96 return NULL;
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97 }
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98 char buf[256];
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99 if (fgets(buf, 256, fptr) == NULL) {
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100 logwrite(LOG_ALERT, "empty online file %s\n", conf.online_file);
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101 fclose(fptr);
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102 return NULL;
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103 }
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104 g_strchomp(g_strchug(buf));
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105 fclose(fptr);
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106 if (strlen(buf) == 0) {
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107 logwrite(LOG_ALERT, "only whitespace connection name in %s\n", conf.online_file);
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108 return NULL;
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109 }
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110 return g_strdup(buf);
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111 } else if (errno == ENOENT) {
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112 logwrite(LOG_NOTICE, "not online.\n");
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113 return NULL;
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114 } else {
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115 logwrite(LOG_ALERT, "stat of %s failed: %s\n", conf.online_file, strerror(errno));
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116 return NULL;
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117 }
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118
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119 } else if (strcmp(conf.online_detect, "pipe") == 0) {
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120 DEBUG(3) debugf("connection method 'pipe'\n");
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121 if (conf.online_pipe)
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122 return detect_online_pipe(conf.online_pipe);
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123 else {
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124 logwrite(LOG_ALERT, "online detection mode is 'pipe', but online_pipe is undefined\n");
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125 return NULL;
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126 }
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127 } else if (strcmp(conf.online_detect, "argument") == 0) {
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128 return connection_name;
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129 } else {
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130 DEBUG(3) debugf("no connection method selected\n");
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131 }
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132
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133 return NULL;
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134 }
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