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annotate src/local.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 a80ebfa16cd5
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1 /* MasqMail
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2 Copyright (C) 1999-2001 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
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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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
15
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19 #include <sys/wait.h>
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20
0
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21 #include "masqmail.h"
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22 #include "peopen.h"
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23
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24 static void
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25 message_stream(FILE * out, message * msg, GList * hdr_list, guint flags)
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26 {
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27 time_t now = time(NULL);
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28 GList *node;
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29
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30 if (flags & MSGSTR_FROMLINE) {
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31 fprintf(out, "From <%s@%s> %s", msg->return_path->local_part, msg->return_path->domain, ctime(&now));
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32 }
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33
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34 foreach(hdr_list, node) {
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35 header *hdr = (header *) (node->data);
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36 fputs(hdr->header, out);
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37 }
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38 putc('\n', out);
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39 foreach(msg->data_list, node) {
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40 /* From hack: */
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41 if (flags & MSGSTR_FROMHACK) {
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42 if (strncmp(node->data, "From ", 5) == 0)
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43 putc('>', out);
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44 }
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45 fputs(node->data, out);
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46 }
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47 putc('\n', out);
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48 }
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49
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50 gboolean
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51 append_file(message * msg, GList * hdr_list, gchar * user)
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52 {
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53 struct passwd *pw;
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54 gboolean ok = FALSE;
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55
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56 /* headers may be special for a local delivery */
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57 if (hdr_list == NULL)
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58 hdr_list = msg->hdr_list;
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59
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60 if ((pw = getpwnam(user))) {
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61 uid_t saved_uid = geteuid();
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62 gid_t saved_gid = getegid();
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63 gboolean uid_ok = TRUE, gid_ok = TRUE;
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64
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65 if (!conf.run_as_user) {
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66 uid_ok = (seteuid(0) == 0);
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67 if (uid_ok) {
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68 gid_ok = (setegid(conf.mail_gid) == 0);
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69 uid_ok = (seteuid(pw->pw_uid) == 0);
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70 }
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71 }
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72
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73 DEBUG(5) debugf("running as euid %d\n", geteuid());
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74 DEBUG(5) debugf("running as egid %d\n", getegid());
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75
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76 if (uid_ok && gid_ok) {
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77 gchar *filename;
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78 FILE *out;
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79
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80 filename = g_strdup_printf("%s/%s", conf.mail_dir, user);
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81 if ((out = fopen(filename, "a"))) {
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82 #ifdef USE_LIBLOCKFILE
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83 gint err;
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84 /* lock file using liblockfile */
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85 err = maillock(user, 3);
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86 if (err == 0) {
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87 #else
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88 /* lock file: */
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89 struct flock lock;
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90 lock.l_type = F_WRLCK;
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91 lock.l_whence = SEEK_END;
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92 lock.l_start = lock.l_len = 0;
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93 if (fcntl(fileno(out), F_SETLK, &lock) != -1) {
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94 #endif
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95 fchmod(fileno(out), 0600);
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96 message_stream(out, msg, hdr_list, MSGSTR_FROMLINE | MSGSTR_FROMHACK);
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97 ok = TRUE;
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98
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99 /* close when still user */
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100 fclose(out);
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101 #ifdef USE_LIBLOCKFILE
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102 mailunlock();
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103 #endif
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104 } else {
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105 fclose(out);
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106 #ifdef USE_LIBLOCKFILE
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107 DEBUG(3) debugf("could not lock file %s: error %d\n", filename, err);
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108 } /* XEmacs indenting convenience... */
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109 #else
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110 DEBUG(3) debugf("could not lock file %s: %s\n", filename, strerror(errno));
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111 }
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112 #endif
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113 } else {
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114 logwrite(LOG_ALERT, "could not open file %s: %s\n", filename, strerror(errno));
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115 }
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116 g_free(filename);
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117
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118 if (!conf.run_as_user) {
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119 uid_ok = (seteuid(0) == 0);
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120 if (uid_ok) {
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121 gid_ok = (setegid(saved_gid) == 0);
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122 uid_ok = (seteuid(saved_uid) == 0);
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123 }
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124 }
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125
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126 if (!uid_ok || !gid_ok) {
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127 /* FIXME: if this fails we HAVE to exit, because we shall not run
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128 with some users id. But we do not return, and so this message
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129 will not be finished, so the user will get the message again
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130 next time a delivery is attempted... */
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131 logwrite(LOG_ALERT, "could not set back uid or gid after local delivery: %s\n", strerror(errno));
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132 logwrite(LOG_ALERT, "uid=%d, gid=%d, euid=%d, egid=%d, want = %d, %d\n",
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133 getuid(), getgid(), geteuid(), getegid(), saved_uid, saved_gid);
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134 exit(EXIT_FAILURE);
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135 }
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136 } else {
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137 logwrite(LOG_ALERT, "could not set uid or gid for local delivery, uid = %d: %s\n", pw->pw_uid, strerror(errno));
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138 }
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139 } else {
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140 logwrite(LOG_ALERT, "could not find password entry for user %s\n", user);
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141 errno = ENOENT; /* getpwnam does not set errno correctly */
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142 }
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143
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144 return ok;
0
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145 }
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146
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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147 #ifdef ENABLE_MAILDIR
10
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148 gboolean
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149 maildir_out(message * msg, GList * hdr_list, gchar * user, guint flags)
0
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150 {
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151 struct passwd *pw;
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152 gboolean ok = FALSE;
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153
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154 /* headers may be special for a local delivery */
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155 if (hdr_list == NULL)
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156 hdr_list = msg->hdr_list;
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157
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158 if ((pw = getpwnam(user))) {
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159 uid_t saved_uid = geteuid();
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160 gid_t saved_gid = getegid();
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161 gboolean uid_ok = TRUE, gid_ok = TRUE;
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162
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163 if (!conf.run_as_user) {
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164 uid_ok = (seteuid(0) == 0);
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165 if (uid_ok) {
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166 gid_ok = (setegid(conf.mail_gid) == 0);
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167 uid_ok = (seteuid(pw->pw_uid) == 0);
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168 }
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169 }
0
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170
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171 DEBUG(5) debugf("running as euid %d\n", geteuid());
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172 DEBUG(5) debugf("running as egid %d\n", getegid());
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173
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174 if (uid_ok && gid_ok) {
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175 char *path = g_strdup_printf("%s/Maildir", pw->pw_dir);
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176 struct stat statbuf;
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177 int ret;
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178
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179 DEBUG(5) debugf("path = %s\n", path);
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180
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181 ok = TRUE;
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182 ret = stat(path, &statbuf);
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183 if (ret != 0) {
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184 ok = FALSE;
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185 if (errno == ENOENT) {
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186 logwrite(LOG_NOTICE, "directory %s does not exist, creating\n", path);
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187 if (mkdir(path, 0700) == 0)
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188 ok = TRUE;
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189 } else
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190 logwrite(LOG_ALERT, "stat of %s failed: %s\n", path, strerror(errno));
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191 }
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192 if (ok) {
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193 ok = FALSE;
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194 ret = stat(path, &statbuf);
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195 if (S_ISDIR(statbuf.st_mode)) {
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196 gchar *subdirs[] = { "tmp", "new", "cur" };
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197 int i;
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198 for (i = 0; i < 3; i++) {
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199 char *path1 = g_strdup_printf("%s/%s", path, subdirs[i]);
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200 ret = stat(path1, &statbuf);
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201 if (ret != 0) {
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202 if (errno == ENOENT) {
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203 logwrite(LOG_NOTICE, "directory %s does not exist, creating\n", path1);
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204 if (mkdir(path1, 0700) != 0)
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205 break;
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206 }
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207 }
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208 g_free(path1);
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209 }
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210 if (i == 3) {
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211 FILE *out;
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212 mode_t saved_mode = umask(066);
15
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213 /* the qmail style unique works only if delivering with different process.
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214 We do not fork for each delivery, so our uid is more unique.
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215 Hope it is compatible with all MUAs.
10
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216 */
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217 gchar *filename = g_strdup_printf("%s/tmp/%s.%s", path, msg->uid, conf.host_name);
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218
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219 DEBUG(5) debugf("filename = %s\n", filename);
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220
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221 if ((out = fopen(filename, "w"))) {
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222 gchar *newname = g_strdup_printf("%s/new/%s.%s", path, msg->uid, conf.host_name);
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223 message_stream(out, msg, hdr_list, flags);
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224 ok = TRUE;
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225 if (fflush(out) == EOF)
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226 ok = FALSE;
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227 else if (fdatasync(fileno(out)) != 0) {
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228 if (errno != EINVAL)
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229 /* some fs do not support this.. I hope this also means that it is not necessary */
10
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230 ok = FALSE;
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231 }
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232 fclose(out);
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parents: 0
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233 if (rename(filename, newname) != 0) {
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234 ok = FALSE;
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parents: 0
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235 logwrite(LOG_ALERT, "moving %s to %s failed: %s", filename, newname, strerror(errno));
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parents: 0
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236 }
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237 g_free(newname);
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238 }
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239 umask(saved_mode);
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240 g_free(filename);
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parents: 0
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241 }
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parents: 0
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242 } else {
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parents: 0
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243 logwrite(LOG_ALERT, "%s is not a directory\n", path);
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244 errno = ENOTDIR;
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parents: 0
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245 }
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parents: 0
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246 }
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parents: 0
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247 if (!conf.run_as_user) {
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248 uid_ok = (seteuid(0) == 0);
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249 if (uid_ok) {
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250 gid_ok = (setegid(saved_gid) == 0);
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251 uid_ok = (seteuid(saved_uid) == 0);
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parents: 0
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252 }
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parents: 0
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253 }
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parents: 0
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254 if (!uid_ok || !gid_ok) {
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parents: 0
diff changeset
255 /* FIXME: if this fails we HAVE to exit, because we shall not run
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256 with some users id. But we do not return, and so this message
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257 will not be finished, so the user will get the message again
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258 next time a delivery is attempted... */
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259 logwrite(LOG_ALERT, "could not set back uid or gid after local delivery: %s\n", strerror(errno));
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260 exit(EXIT_FAILURE);
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parents: 0
diff changeset
261 }
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262 g_free(path);
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parents: 0
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263 } else {
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264 logwrite(LOG_ALERT, "could not set uid or gid for local delivery, uid = %d: %s\n", pw->pw_uid, strerror(errno));
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265 }
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266 } else {
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267 logwrite(LOG_ALERT, "could not find password entry for user %s\n", user);
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268 errno = ENOENT; /* getpwnam does not set errno correctly */
0
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269 }
10
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270 return ok;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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271 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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272 #endif
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273
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274 gboolean
10
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parents: 0
diff changeset
275 pipe_out(message * msg, GList * hdr_list, address * rcpt, gchar * cmd, guint flags)
0
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276 {
10
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diff changeset
277 gchar *envp[40];
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278 FILE *out;
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279 uid_t saved_uid = geteuid();
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280 gid_t saved_gid = getegid();
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diff changeset
281 gboolean ok = FALSE;
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parents: 0
diff changeset
282 gint i, n;
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parents: 0
diff changeset
283 pid_t pid;
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diff changeset
284 void (*old_signal) (int);
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diff changeset
285 int status;
0
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286
10
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parents: 0
diff changeset
287 /* set uid and gid to the mail ids */
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parents: 0
diff changeset
288 if (!conf.run_as_user) {
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289 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
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290 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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291
10
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292 /* set environment */
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parents: 0
diff changeset
293 {
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meillo@marmaro.de
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294 gint i = 0;
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295 address *ancestor = addr_find_ancestor(rcpt);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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296
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297 envp[i++] = g_strdup_printf("SENDER=%s@%s", msg->return_path->local_part, msg->return_path->domain);
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298 envp[i++] = g_strdup_printf("SENDER_DOMAIN=%s", msg->return_path->domain);
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299 envp[i++] = g_strdup_printf("SENDER_LOCAL=%s", msg->return_path->local_part);
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300 envp[i++] = g_strdup_printf("RECEIVED_HOST=%s", msg->received_host ? msg->received_host : "");
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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301
10
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302 envp[i++] = g_strdup_printf("RETURN_PATH=%s@%s", msg->return_path->local_part, msg->return_path->domain);
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303 envp[i++] = g_strdup_printf("DOMAIN=%s", ancestor->domain);
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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304
10
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305 envp[i++] = g_strdup_printf("LOCAL_PART=%s", ancestor->local_part);
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306 envp[i++] = g_strdup_printf("USER=%s", ancestor->local_part);
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307 envp[i++] = g_strdup_printf("LOGNAME=%s", ancestor->local_part);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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308
10
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meillo@marmaro.de
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309 envp[i++] = g_strdup_printf("MESSAGE_ID=%s", msg->uid);
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310 envp[i++] = g_strdup_printf("QUALIFY_DOMAIN=%s", conf.host_name);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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311
10
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312 envp[i] = NULL;
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313 n = i;
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314 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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315
10
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316 old_signal = signal(SIGCHLD, SIG_DFL);
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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317
10
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318 out = peidopen(cmd, "w", envp, &pid, conf.mail_uid, conf.mail_gid);
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319 if (out != NULL) {
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320 message_stream(out, msg, hdr_list, flags);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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321
10
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322 fclose(out);
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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323
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parents: 0
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324 waitpid(pid, &status, 0);
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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325
10
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326 if (WEXITSTATUS(status) != 0) {
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327 int exstat = WEXITSTATUS(status);
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328 logwrite(LOG_ALERT, "process returned %d (%s)\n", exstat, ext_strerror(1024 + exstat));
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329 errno = 1024 + exstat;
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330 } else if (WIFSIGNALED(status)) {
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331 logwrite(LOG_ALERT, "process got signal %d\n", WTERMSIG(status));
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meillo@marmaro.de
parents: 0
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332 } else
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parents: 0
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333 ok = TRUE;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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334
10
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meillo@marmaro.de
parents: 0
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335 } else
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meillo@marmaro.de
parents: 0
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336 logwrite(LOG_ALERT, "could not open pipe '%s': %s\n", cmd, strerror(errno));
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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337
10
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meillo@marmaro.de
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338 signal(SIGCHLD, old_signal);
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meillo@marmaro.de
parents: 0
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339
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340 /* free environment */
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341 for (i = 0; i < n; i++) {
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meillo@marmaro.de
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342 g_free(envp[i]);
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meillo@marmaro.de
parents: 0
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343 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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344
10
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meillo@marmaro.de
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345 /* set uid and gid back */
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parents: 0
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346 if (!conf.run_as_user) {
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meillo@marmaro.de
parents: 0
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347 set_euidgid(saved_uid, saved_gid, NULL, NULL);
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meillo@marmaro.de
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348 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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349
10
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meillo@marmaro.de
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350 return ok;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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351 }