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annotate src/get.c @ 52:c80a5730bcc5

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next release will be 0.2.23
author meillo@marmaro.de
date Thu, 27 May 2010 13:33:14 +0200
parents f671821d8222
children dc89737b27aa
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1 /* MasqMail
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2 Copyright (C) 2000-2002 Oliver Kurth
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3
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4 This program is free software; you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 2 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program; if not, write to the Free Software
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16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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17 */
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18
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19 #include <sys/wait.h>
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20 #include <sys/file.h>
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21 #include <sys/types.h>
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22
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23 #include "masqmail.h"
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24 #include "pop3_in.h"
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25
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26 #ifdef ENABLE_POP3
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27
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28 static int volatile sighup_seen = 0;
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29
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30 static void
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31 sighup_handler(int sig)
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32 {
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33 sighup_seen = 1;
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34 signal(SIGHUP, sighup_handler);
0
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35 }
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36
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37 static void
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38 sigchld_handler(int sig)
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39 {
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40 pid_t pid;
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41 int status;
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42
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43 pid = waitpid(0, &status, 0);
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44 if (pid > 0) {
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45 if (WEXITSTATUS(status) != EXIT_SUCCESS)
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46 logwrite(LOG_WARNING, "process %d exited with %d\n", pid, WEXITSTATUS(status));
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47 if (WIFSIGNALED(status))
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48 logwrite(LOG_WARNING, "process with pid %d got signal: %d\n", pid, WTERMSIG(status));
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49 }
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50 signal(SIGCHLD, sigchld_handler);
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51 }
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52
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53 static int
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54 get_lock(get_conf * gc)
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55 {
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56 #ifdef USE_DOTLOCK
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57 gboolean ok = FALSE;
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58 gchar *hitch_name;
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59 gchar *lock_name;
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60
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61 /* the name of the lock is constructed from the user
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62 and the server name, to prevent more than one connection at the same time
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63 to the same server and the same user. This way concurrent connections
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64 are possible to different servers or different users */
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65 hitch_name = g_strdup_printf("%s/masqmail-get-%s@%s-%d.lock",
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66 conf.lock_dir, gc->login_user, gc->server_name, getpid());
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67 lock_name = g_strdup_printf("%s/masqmail-get-%s@%s.lock",
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68 conf.lock_dir, gc->login_user, gc->server_name);
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69
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70 ok = dot_lock(lock_name, hitch_name);
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71 if (!ok)
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72 logwrite(LOG_WARNING, "getting mail for %s@%s is locked\n", gc->login_user, gc->server_name);
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73
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74 g_free(lock_name);
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75 g_free(hitch_name);
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76
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77 return ok;
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78 #else
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79 gchar *lock_name;
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80 int fd;
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81
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82 lock_name = g_strdup_printf("%s/masqmail-get-%s@%s.lock", conf.lock_dir, gc->login_user, gc->server_name);
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83
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84 if ((fd = open(lock_name, O_WRONLY | O_NDELAY | O_APPEND | O_CREAT, 0600)) >= 0) {
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85 if (flock(fd, LOCK_EX | LOCK_NB) != 0) {
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86 close(fd);
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87 logwrite(LOG_WARNING, "getting mail for %s@%s is locked\n", gc->login_user, gc->server_name);
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88 fd = -1;
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89 }
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90 } else
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91 logwrite(LOG_WARNING, "could not open lock %s: %s\n", lock_name, strerror(errno));
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92
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93 g_free(lock_name);
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94
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95 return fd;
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96 #endif
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97 }
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98
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99 #ifdef USE_DOTLOCK
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100 static gboolean
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101 get_unlock(get_conf * gc)
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102 {
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103 gchar *lock_name lock_name = g_strdup_printf("%s/masqmail-get-%s@%s.lock",
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104 conf.lock_dir, gc->login_user, gc->server_name);
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105
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106 dot_unlock(lock_name);
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107 g_free(lock_name);
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108
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109 return TRUE;
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110 }
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111 #else
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112 static void
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113 get_unlock(get_conf * gc, int fd)
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114 {
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115 gchar *lock_name = g_strdup_printf("%s/masqmail-get-%s@%s.lock",
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116 conf.lock_dir, gc->login_user, gc->server_name);
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117
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118 flock(fd, LOCK_UN);
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119 close(fd);
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120
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121 unlink(lock_name);
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122 g_free(lock_name);
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123 }
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124 #endif
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125
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126 gboolean
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127 get_from_file(gchar * fname)
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128 {
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129 guint flags = 0;
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130 get_conf *gc = read_get_conf(fname);
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131 gboolean ok = TRUE;
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132 int lock;
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133
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134 if (gc) {
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135 if (!gc->do_keep)
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136 flags |= POP3_FLAG_DELETE;
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137 if (gc->do_uidl)
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138 flags |= POP3_FLAG_UIDL;
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139 if (gc->do_uidl_dele)
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140 flags |= POP3_FLAG_UIDL_DELE;
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141
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142 if (!(gc->server_name)) {
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143 logwrite(LOG_ALERT, "no server name given in %s\n", fname);
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144 return FALSE;
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145 }
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146 if (!(gc->address)) {
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parents: 0
diff changeset
147 logwrite(LOG_ALERT, "no address given in %s\n", fname);
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parents: 0
diff changeset
148 return FALSE;
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parents: 0
diff changeset
149 }
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meillo@marmaro.de
parents: 0
diff changeset
150 if (!(gc->login_user)) {
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parents: 0
diff changeset
151 logwrite(LOG_ALERT, "no user name given in %s\n", fname);
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parents: 0
diff changeset
152 return FALSE;
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meillo@marmaro.de
parents: 0
diff changeset
153 }
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
154 if (!(gc->login_pass)) {
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
155 logwrite(LOG_ALERT, "no password given in %s\n", fname);
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meillo@marmaro.de
parents: 0
diff changeset
156 return FALSE;
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meillo@marmaro.de
parents: 0
diff changeset
157 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
158
10
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parents: 0
diff changeset
159 DEBUG(3) debugf("flags = %d\n", flags);
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parents: 0
diff changeset
160
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meillo@marmaro.de
parents: 0
diff changeset
161 if ((strcmp(gc->protocol, "pop3") == 0) || (strcmp(gc->protocol, "apop") == 0)) {
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parents: 0
diff changeset
162 pop3_base *popb = NULL;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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parents:
diff changeset
163
10
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meillo@marmaro.de
parents: 0
diff changeset
164 if (strcmp(gc->protocol, "apop") == 0) {
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meillo@marmaro.de
parents: 0
diff changeset
165 flags |= POP3_FLAG_APOP;
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parents: 0
diff changeset
166 DEBUG(3) debugf("attempting to get mail for user %s at host %s for %s@%s with apop\n",
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meillo@marmaro.de
parents: 0
diff changeset
167 gc->login_user, gc->server_name, gc->address->local_part, gc->address->domain);
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meillo@marmaro.de
parents: 0
diff changeset
168 } else {
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parents: 0
diff changeset
169 DEBUG(3) debugf("attempting to get mail for user %s at host %s for %s@%s with pop3\n",
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parents: 0
diff changeset
170 gc->login_user, gc->server_name, gc->address->local_part, gc->address->domain);
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meillo@marmaro.de
parents: 0
diff changeset
171 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
172 #ifdef USE_DOTLOCK
10
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parents: 0
diff changeset
173 if ((lock = get_lock(gc))) {
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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174 #else
10
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parents: 0
diff changeset
175 if ((lock = get_lock(gc)) >= 0) {
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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parents:
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176 #endif
10
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parents: 0
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177 if (gc->wrapper) {
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parents: 0
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178 popb = pop3_in_open_child(gc->wrapper, flags);
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parents: 0
diff changeset
179 /* quick hack */
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parents: 0
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180 popb->remote_host = gc->server_name;
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parents: 0
diff changeset
181 } else {
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parents: 0
diff changeset
182 popb = pop3_in_open(gc->server_name, gc->server_port, gc->resolve_list, flags);
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parents: 0
diff changeset
183 }
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parents: 0
diff changeset
184 if (popb) {
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parents: 0
diff changeset
185 ok = pop3_get(popb, gc->login_user, gc->login_pass, gc->address, gc->return_path,
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parents: 0
diff changeset
186 gc->max_count, gc->max_size, gc->max_size_delete);
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parents: 0
diff changeset
187 pop3_in_close(popb);
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parents: 0
diff changeset
188 } else {
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parents: 0
diff changeset
189 ok = FALSE;
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parents: 0
diff changeset
190 logwrite(LOG_ALERT, "failed to connect to host %s\n", gc->server_name);
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meillo@marmaro.de
parents: 0
diff changeset
191 }
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parents: 0
diff changeset
192 #ifdef USE_DOTLOCK
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parents: 0
diff changeset
193 get_unlock(gc);
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parents: 0
diff changeset
194 #else
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parents: 0
diff changeset
195 get_unlock(gc, lock);
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parents: 0
diff changeset
196 #endif
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parents: 0
diff changeset
197 }
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parents: 0
diff changeset
198 } else {
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parents: 0
diff changeset
199 logwrite(LOG_ALERT, "get protocol %s unknown\n", gc->protocol);
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parents: 0
diff changeset
200 ok = FALSE;
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parents: 0
diff changeset
201 }
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
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parents: 0
diff changeset
202
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meillo@marmaro.de
parents: 0
diff changeset
203 destroy_get_conf(gc);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
204 }
10
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
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parents: 0
diff changeset
205 return ok;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
206 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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parents:
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207
10
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parents: 0
diff changeset
208 gboolean
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parents: 0
diff changeset
209 get_from_name(gchar * name)
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
210 {
10
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parents: 0
diff changeset
211 gchar *fname = (gchar *) table_find(conf.get_names, name);
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parents: 0
diff changeset
212 if (fname)
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parents: 0
diff changeset
213 return get_from_file(fname);
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parents: 0
diff changeset
214 return FALSE;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
215 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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216
10
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parents: 0
diff changeset
217 gboolean
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parents: 0
diff changeset
218 get_all()
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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diff changeset
219 {
10
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parents: 0
diff changeset
220 GList *get_table = conf.get_names;
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parents: 0
diff changeset
221 GList *get_node;
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parents: 0
diff changeset
222 void (*old_signal) (int);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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223
10
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224 old_signal = signal(SIGCHLD, SIG_DFL);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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225
10
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parents: 0
diff changeset
226 foreach(get_table, get_node) {
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parents: 0
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227 table_pair *pair = (table_pair *) (get_node->data);
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parents: 0
diff changeset
228 gchar *fname = (gchar *) pair->value;
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parents: 0
diff changeset
229 pid_t pid;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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230
10
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parents: 0
diff changeset
231 pid = fork();
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parents: 0
diff changeset
232 if (pid == 0) {
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parents: 0
diff changeset
233 signal(SIGCHLD, old_signal);
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parents: 0
diff changeset
234 exit(get_from_file(fname) ? EXIT_SUCCESS : EXIT_FAILURE);
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meillo@marmaro.de
parents: 0
diff changeset
235 } else if (pid > 0) {
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parents: 0
diff changeset
236 int status;
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meillo@marmaro.de
parents: 0
diff changeset
237 waitpid(pid, &status, 0);
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meillo@marmaro.de
parents: 0
diff changeset
238 if (WEXITSTATUS(status) != EXIT_SUCCESS)
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parents: 0
diff changeset
239 logwrite(LOG_WARNING, "child returned %d\n", WEXITSTATUS(status));
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meillo@marmaro.de
parents: 0
diff changeset
240 if (WIFSIGNALED(status))
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meillo@marmaro.de
parents: 0
diff changeset
241 logwrite(LOG_WARNING, "child got signal: %d\n", WTERMSIG(status));
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meillo@marmaro.de
parents: 0
diff changeset
242 } else
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meillo@marmaro.de
parents: 0
diff changeset
243 logwrite(LOG_WARNING, "forking child failed: %s\n", strerror(errno));
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meillo@marmaro.de
parents: 0
diff changeset
244 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
245
10
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parents: 0
diff changeset
246 signal(SIGCHLD, old_signal);
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meillo@marmaro.de
parents: 0
diff changeset
247
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meillo@marmaro.de
parents: 0
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248 return TRUE;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
249 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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250
10
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parents: 0
diff changeset
251 void
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meillo@marmaro.de
parents: 0
diff changeset
252 get_online()
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
253 {
10
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
254 GList *gf_list = NULL;
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meillo@marmaro.de
parents: 0
diff changeset
255 gchar *connect_name = detect_online();
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
256
10
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
257 if (connect_name != NULL) {
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meillo@marmaro.de
parents: 0
diff changeset
258 void (*old_signal) (int);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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diff changeset
259
10
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meillo@marmaro.de
parents: 0
diff changeset
260 old_signal = signal(SIGCHLD, SIG_DFL);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
261
10
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meillo@marmaro.de
parents: 0
diff changeset
262 logwrite(LOG_NOTICE, "detected online configuration %s\n", connect_name);
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meillo@marmaro.de
parents: 0
diff changeset
263 /* we are online! */
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meillo@marmaro.de
parents: 0
diff changeset
264 gf_list = (GList *) table_find(conf.online_gets, connect_name);
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meillo@marmaro.de
parents: 0
diff changeset
265 if (gf_list != NULL) {
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meillo@marmaro.de
parents: 0
diff changeset
266 GList *node;
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meillo@marmaro.de
parents: 0
diff changeset
267 foreach(gf_list, node) {
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meillo@marmaro.de
parents: 0
diff changeset
268 gchar *fname = (gchar *) (node->data);
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meillo@marmaro.de
parents: 0
diff changeset
269 pid_t pid;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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diff changeset
270
10
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parents: 0
diff changeset
271 if (fname[0] != '/')
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meillo@marmaro.de
parents: 0
diff changeset
272 fname = (gchar *) table_find(conf.get_names, fname);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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273
10
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parents: 0
diff changeset
274 if (fname != NULL) {
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meillo@marmaro.de
parents: 0
diff changeset
275 pid = fork();
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meillo@marmaro.de
parents: 0
diff changeset
276 if (pid == 0) {
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
277 signal(SIGCHLD, old_signal);
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parents: 0
diff changeset
278 exit(get_from_file(fname) ? EXIT_SUCCESS : EXIT_FAILURE);
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meillo@marmaro.de
parents: 0
diff changeset
279 } else if (pid > 0) {
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meillo@marmaro.de
parents: 0
diff changeset
280 int status;
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meillo@marmaro.de
parents: 0
diff changeset
281 waitpid(pid, &status, 0);
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meillo@marmaro.de
parents: 0
diff changeset
282 if (WEXITSTATUS(status) != EXIT_SUCCESS)
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
283 logwrite(LOG_WARNING, "child returned %d\n", WEXITSTATUS(status));
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
284 if (WIFSIGNALED(status))
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
285 logwrite(LOG_WARNING, "child got signal: %d\n", WTERMSIG(status));
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
286 } else
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
287 logwrite(LOG_WARNING, "forking child failed: %s\n", strerror(errno));
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meillo@marmaro.de
parents: 0
diff changeset
288 }
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
289 }
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
290 }
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
parents: 0
diff changeset
291 signal(SIGCHLD, old_signal);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
292 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
293 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
diff changeset
294
10
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meillo@marmaro.de
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295 void
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296 get_daemon(gint gival, char *argv[])
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297 {
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298 struct timeval tm;
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299 time_t time_before, time_now;
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300 int sel_ret;
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301
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302 /* setup handler for HUP signal: */
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303 signal(SIGHUP, sighup_handler);
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304
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305 /* we can give up root privileges */
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306 if (!conf.run_as_user) {
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307 if (setegid(conf.mail_gid) != 0) {
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308 logwrite(LOG_ALERT, "could not change gid to %d: %s\n", conf.mail_gid, strerror(errno));
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309 exit(EXIT_FAILURE);
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310 }
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311 if (seteuid(conf.mail_uid) != 0) {
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312 logwrite(LOG_ALERT, "could not change uid to %d: %s\n", conf.mail_uid, strerror(errno));
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313 exit(EXIT_FAILURE);
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314 }
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315 }
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316
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317 /* sel_ret = 0; */
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318 time(&time_before);
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319 time_before -= gival;
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320 sel_ret = -1;
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321
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322 while (1) {
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323 /* see listen_port() in listen.c */
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324 if (gival > 0) {
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325 time(&time_now);
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326 if (sel_ret == 0) { /* we are either just starting or did a queue run */
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327 tm.tv_sec = gival;
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328 tm.tv_usec = 0;
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329 time_before = time_now;
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330 } else {
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331 tm.tv_sec = gival - (time_now - time_before);
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332 tm.tv_usec = 0;
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333
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334 /* race condition, very unlikely (but possible): */
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335 if (tm.tv_sec < 0)
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336 tm.tv_sec = 0;
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337 }
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338 }
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339
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340 if ((sel_ret = select(0, NULL, NULL, NULL, &tm)) < 0) {
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341 if (errno != EINTR) {
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342 logwrite(LOG_ALERT, "select: (terminating): %s\n", strerror(errno));
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343 exit(EXIT_FAILURE);
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344 } else {
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345 if (sighup_seen) {
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346 logwrite(LOG_NOTICE, "HUP signal received. Restarting daemon\n");
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347
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348 if (argv == NULL)
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349 exit(EXIT_SUCCESS);
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350
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351 execv(argv[0], &(argv[0]));
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352 logwrite(LOG_ALERT, "restarting failed: %s\n", strerror(errno));
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353 exit(EXIT_FAILURE);
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354
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355 }
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356 }
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357 } else {
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358 /* If select returns 0, the interval time has elapsed. We start a new get process */
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359 int pid;
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360 signal(SIGCHLD, sigchld_handler);
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361 if ((pid = fork()) == 0) {
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362 get_online();
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363
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364 _exit(EXIT_SUCCESS);
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365 } else if (pid < 0) {
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366 logwrite(LOG_ALERT, "could not fork for get run");
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367 }
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368 }
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369 }
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370 }
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371
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372 gboolean
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373 pop_before_smtp(gchar * fname)
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374 {
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375 gboolean ok = FALSE;
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376 GList *resolve_list = NULL;
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377 get_conf *gc = read_get_conf(fname);
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378 guint flags = 0;
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379
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380 #ifdef ENABLE_RESOLVER
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381 resolve_list = g_list_append(resolve_list, resolve_dns_a);
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382 #endif
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383 resolve_list = g_list_append(resolve_list, resolve_byname);
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384
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385 if (strcmp(gc->protocol, "pop3") == 0) {
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386 DEBUG(3) debugf("attempting to login for user %s, host = %s with pop3\n", gc->login_user, gc->server_name);
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387 ok = pop3_login(gc->server_name, gc->server_port, resolve_list, gc->login_user, gc->login_pass, flags);
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388 } else if (strcmp(gc->protocol, "apop") == 0) {
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389 DEBUG(3) debugf ("attempting to login for user %s, host = %s with apop\n", gc->login_user, gc->server_name);
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390 ok = pop3_login(gc->server_name, gc->server_port, resolve_list, gc->login_user,
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391 gc->login_pass, flags | POP3_FLAG_APOP);
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392 } else {
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393 logwrite(LOG_ALERT, "get protocol %s unknown\n", gc->protocol);
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394 }
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395 return ok;
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396 }
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397
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398 #endif