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annotate src/get.c @ 91:3e7136221104

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correct masqmail path in rmail script; remove docs on uninstall on install the correct path to the masqmail executable gets inserted into the rmail script now. now documentation, examples, and the templates are removed on uninstall. Empty directories are the only thing that may remain if one installs masqmail into an unusual path.
author meillo@marmaro.de
date Mon, 21 Jun 2010 09:40:16 +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);
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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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meillo@marmaro.de
parents: 0
diff changeset
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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meillo@marmaro.de
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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meillo@marmaro.de
parents: 0
diff changeset
151 logwrite(LOG_ALERT, "no user name given in %s\n", fname);
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meillo@marmaro.de
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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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
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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
meillo@marmaro.de
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 }
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
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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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meillo@marmaro.de
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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meillo@marmaro.de
parents: 0
diff changeset
201 }
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
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
meillo@marmaro.de
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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parents:
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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
meillo@marmaro.de
parents:
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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parents: 0
diff changeset
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
diff changeset
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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meillo@marmaro.de
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
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
meillo@marmaro.de
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
diff changeset
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
meillo@marmaro.de
parents:
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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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);
26e34ae9a3e3 changed indention and line wrapping to a more consistent style
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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parents:
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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parents:
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273
10
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meillo@marmaro.de
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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meillo@marmaro.de
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
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294
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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
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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398 #endif