Mercurial > masqmail-0.2

annotate src/local.c @ 179:ec3fe72a3e99

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Fixed an important bug with folded headers! g_strconcat() returns a *copy* of the string, but hdr->value still pointed to the old header (which probably was a memory leak, too). If the folded part had been quite small it was likely that the new string was at the same position as the old one, thus making everything go well. But if pretty long headers were folded several times it was likely that the new string was allocated somewhere else in memory, thus breaking things. In result mails to lots of recipients (folded header) were frequently only sent to the ones in the first line. Sorry for the inconvenience.
author meillo@marmaro.de
date Fri, 03 Jun 2011 09:52:17 +0200
parents d1c53e76096f
children
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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
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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/stat.h>
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21
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22 #include "masqmail.h"
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23 #include "peopen.h"
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24
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25 static void
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26 message_stream(FILE * out, message * msg, GList * hdr_list, guint flags)
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27 {
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28 time_t now = time(NULL);
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29 GList *node;
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30
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31 if (flags & MSGSTR_FROMLINE) {
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32 fprintf(out, "From <%s@%s> %s", msg->return_path->local_part, msg->return_path->domain, ctime(&now));
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33 }
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34
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35 foreach(hdr_list, node) {
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36 header *hdr = (header *) (node->data);
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37 fputs(hdr->header, out);
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38 }
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39 putc('\n', out);
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40 foreach(msg->data_list, node) {
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41 /* From hack: */
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42 if (flags & MSGSTR_FROMHACK) {
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43 if (strncmp(node->data, "From ", 5) == 0)
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44 putc('>', out);
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45 }
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46 fputs(node->data, out);
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47 }
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48 putc('\n', out);
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49 }
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50
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51 gboolean
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52 append_file(message * msg, GList * hdr_list, gchar * user)
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53 {
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54 struct passwd *pw;
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55 gboolean ok = FALSE;
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56
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57 /* headers may be special for a local delivery */
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58 if (hdr_list == NULL)
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59 hdr_list = msg->hdr_list;
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60
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61 if ((pw = getpwnam(user))) {
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62 uid_t saved_uid = geteuid();
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63 gid_t saved_gid = getegid();
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64 gboolean uid_ok = TRUE, gid_ok = TRUE;
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66 if (!conf.run_as_user) {
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67 uid_ok = (seteuid(0) == 0);
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68 if (uid_ok) {
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69 gid_ok = (setegid(conf.mail_gid) == 0);
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70 uid_ok = (seteuid(pw->pw_uid) == 0);
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71 }
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72 }
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73
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74 DEBUG(5) debugf("running as euid %d, egid %d\n", geteuid(), getegid());
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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
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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145 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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146
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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147 #ifdef ENABLE_MAILDIR
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diff changeset
148 gboolean
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149 maildir_out(message * msg, GList * hdr_list, gchar * user, guint flags)
0
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150 {
10
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diff changeset
151 struct passwd *pw;
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diff changeset
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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parents: 0
diff changeset
155 if (hdr_list == NULL)
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diff changeset
156 hdr_list = msg->hdr_list;
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parents: 0
diff changeset
157
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parents: 0
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158 if ((pw = getpwnam(user))) {
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parents: 0
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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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diff changeset
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
114
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171 DEBUG(5) debugf("running as euid %d, egid %d\n", geteuid(), getegid());
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172
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173 if (uid_ok && gid_ok) {
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174 char *path = g_strdup_printf("%s/Maildir", pw->pw_dir);
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175 struct stat statbuf;
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176 int ret;
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177
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178 DEBUG(5) debugf(" path = %s\n", path);
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179
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180 ok = TRUE;
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181 ret = stat(path, &statbuf);
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182 if (ret != 0) {
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183 ok = FALSE;
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184 if (errno == ENOENT) {
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185 logwrite(LOG_NOTICE, "directory %s does not exist, creating\n", path);
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186 if (mkdir(path, 0700) == 0)
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187 ok = TRUE;
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188 } else
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189 logwrite(LOG_ALERT, "stat of %s failed: %s\n", path, strerror(errno));
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190 }
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191 if (ok) {
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192 ok = FALSE;
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193 ret = stat(path, &statbuf);
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194 if (S_ISDIR(statbuf.st_mode)) {
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195 gchar *subdirs[] = { "tmp", "new", "cur" };
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196 int i;
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197 for (i = 0; i < 3; i++) {
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198 char *path1 = g_strdup_printf("%s/%s", path, subdirs[i]);
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199 ret = stat(path1, &statbuf);
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200 if (ret != 0) {
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201 if (errno == ENOENT) {
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202 logwrite(LOG_NOTICE, "directory %s does not exist, creating\n", path1);
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203 if (mkdir(path1, 0700) != 0)
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204 break;
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parents: 0
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205 }
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206 }
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207 g_free(path1);
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208 }
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209 if (i == 3) {
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210 FILE *out;
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211 mode_t saved_mode = umask(066);
15
f671821d8222 code beautifying; 0 -> \0 if appropriate
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212 /* the qmail style unique works only if delivering with different process.
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213 We do not fork for each delivery, so our uid is more unique.
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214 Hope it is compatible with all MUAs.
10
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215 */
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216 gchar *filename = g_strdup_printf("%s/tmp/%s.%s", path, msg->uid, conf.host_name);
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217
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218 DEBUG(5) debugf("filename = %s\n", filename);
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219
10
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220 if ((out = fopen(filename, "w"))) {
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221 gchar *newname = g_strdup_printf("%s/new/%s.%s", path, msg->uid, conf.host_name);
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222 message_stream(out, msg, hdr_list, flags);
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223 ok = TRUE;
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224 if (fflush(out) == EOF)
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225 ok = FALSE;
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226 else if (fdatasync(fileno(out)) != 0) {
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227 if (errno != EINVAL)
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228 /* some fs do not support this.. I hope this also means that it is not necessary */
10
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229 ok = FALSE;
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230 }
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231 fclose(out);
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parents: 0
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232 if (rename(filename, newname) != 0) {
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233 ok = FALSE;
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parents: 0
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234 logwrite(LOG_ALERT, "moving %s to %s failed: %s", filename, newname, strerror(errno));
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parents: 0
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235 }
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parents: 0
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236 g_free(newname);
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parents: 0
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237 }
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238 umask(saved_mode);
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parents: 0
diff changeset
239 g_free(filename);
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parents: 0
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240 }
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parents: 0
diff changeset
241 } else {
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parents: 0
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242 logwrite(LOG_ALERT, "%s is not a directory\n", path);
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parents: 0
diff changeset
243 errno = ENOTDIR;
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parents: 0
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244 }
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parents: 0
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245 }
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parents: 0
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246 if (!conf.run_as_user) {
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247 uid_ok = (seteuid(0) == 0);
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parents: 0
diff changeset
248 if (uid_ok) {
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249 gid_ok = (setegid(saved_gid) == 0);
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250 uid_ok = (seteuid(saved_uid) == 0);
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parents: 0
diff changeset
251 }
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parents: 0
diff changeset
252 }
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parents: 0
diff changeset
253 if (!uid_ok || !gid_ok) {
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parents: 0
diff changeset
254 /* FIXME: if this fails we HAVE to exit, because we shall not run
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parents: 0
diff changeset
255 with some users id. But we do not return, and so this message
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256 will not be finished, so the user will get the message again
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diff changeset
257 next time a delivery is attempted... */
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parents: 0
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258 logwrite(LOG_ALERT, "could not set back uid or gid after local delivery: %s\n", strerror(errno));
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259 exit(EXIT_FAILURE);
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parents: 0
diff changeset
260 }
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261 g_free(path);
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parents: 0
diff changeset
262 } else {
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263 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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parents: 0
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264 }
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265 } else {
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266 logwrite(LOG_ALERT, "could not find password entry for user %s\n", user);
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267 errno = ENOENT; /* getpwnam does not set errno correctly */
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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268 }
10
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diff changeset
269 return ok;
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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270 }
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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271 #endif
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272
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273 gboolean
10
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diff changeset
274 pipe_out(message * msg, GList * hdr_list, address * rcpt, gchar * cmd, guint flags)
0
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275 {
10
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diff changeset
276 gchar *envp[40];
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277 FILE *out;
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parents: 0
diff changeset
278 uid_t saved_uid = geteuid();
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parents: 0
diff changeset
279 gid_t saved_gid = getegid();
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diff changeset
280 gboolean ok = FALSE;
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parents: 0
diff changeset
281 gint i, n;
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parents: 0
diff changeset
282 pid_t pid;
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parents: 0
diff changeset
283 void (*old_signal) (int);
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diff changeset
284 int status;
0
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285
10
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diff changeset
286 /* set uid and gid to the mail ids */
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parents: 0
diff changeset
287 if (!conf.run_as_user) {
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diff changeset
288 set_euidgid(conf.mail_uid, conf.mail_gid, &saved_uid, &saved_gid);
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289 }
0
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290
10
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291 /* set environment */
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parents: 0
diff changeset
292 {
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meillo@marmaro.de
parents: 0
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293 gint i = 0;
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294 address *ancestor = addr_find_ancestor(rcpt);
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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295
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296 envp[i++] = g_strdup_printf("SENDER=%s@%s", msg->return_path->local_part, msg->return_path->domain);
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297 envp[i++] = g_strdup_printf("SENDER_DOMAIN=%s", msg->return_path->domain);
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298 envp[i++] = g_strdup_printf("SENDER_LOCAL=%s", msg->return_path->local_part);
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299 envp[i++] = g_strdup_printf("RECEIVED_HOST=%s", msg->received_host ? msg->received_host : "");
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300
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301 envp[i++] = g_strdup_printf("RETURN_PATH=%s@%s", msg->return_path->local_part, msg->return_path->domain);
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302 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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303
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304 envp[i++] = g_strdup_printf("LOCAL_PART=%s", ancestor->local_part);
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305 envp[i++] = g_strdup_printf("USER=%s", ancestor->local_part);
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306 envp[i++] = g_strdup_printf("LOGNAME=%s", ancestor->local_part);
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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307
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308 envp[i++] = g_strdup_printf("MESSAGE_ID=%s", msg->uid);
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309 envp[i++] = g_strdup_printf("QUALIFY_DOMAIN=%s", conf.host_name);
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310
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311 envp[i] = NULL;
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312 n = i;
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313 }
0
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314
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315 old_signal = signal(SIGCHLD, SIG_DFL);
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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316
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317 out = peidopen(cmd, "w", envp, &pid, conf.mail_uid, conf.mail_gid);
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318 if (out != NULL) {
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319 message_stream(out, msg, hdr_list, flags);
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320
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321 fclose(out);
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322
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parents: 0
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323 waitpid(pid, &status, 0);
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
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324
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325 if (WEXITSTATUS(status) != 0) {
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326 int exstat = WEXITSTATUS(status);
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327 logwrite(LOG_ALERT, "process returned %d (%s)\n", exstat, ext_strerror(1024 + exstat));
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328 errno = 1024 + exstat;
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329 } else if (WIFSIGNALED(status)) {
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330 logwrite(LOG_ALERT, "process got signal %d\n", WTERMSIG(status));
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parents: 0
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331 } else
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parents: 0
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332 ok = TRUE;
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333
10
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334 } else
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parents: 0
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335 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
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336
10
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meillo@marmaro.de
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337 signal(SIGCHLD, old_signal);
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parents: 0
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338
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339 /* free environment */
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parents: 0
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340 for (i = 0; i < n; i++) {
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meillo@marmaro.de
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341 g_free(envp[i]);
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meillo@marmaro.de
parents: 0
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342 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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343
10
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parents: 0
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344 /* set uid and gid back */
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parents: 0
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345 if (!conf.run_as_user) {
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346 set_euidgid(saved_uid, saved_gid, NULL, NULL);
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meillo@marmaro.de
parents: 0
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347 }
0
08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
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348
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349 return ok;
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08114f7dcc23 this is masqmail-0.2.21 from oliver kurth
meillo@marmaro.de
parents:
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350 }