masqmail

view src/fail_msg.c @ 215:08b32edca1d5

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added the contents of the old FAQ page it surely needs an update
author meillo@marmaro.de
date Mon, 19 Jul 2010 14:10:14 +0200
parents f671821d8222
children bc9d9cd9ee8e
line source
1 /* MasqMail
2 Copyright (C) 2000-2001 Oliver Kurth
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 #include <sys/wait.h>
20
21 #include "masqmail.h"
22 #include "peopen.h"
23 #include "readsock.h"
24
25 gboolean
26 fail_msg(message * msg, gchar * template, GList * failed_rcpts, gchar * err_fmt, va_list args)
27 {
28 gboolean ok = FALSE;
29 address *ret_path = NULL;
30
31 /* do not bounce bounces, send to postmaster instead */
32 if (msg->return_path->local_part[0] == '\0') {
33 GList *node;
34
35 ret_path = create_address_qualified("postmaster", TRUE, conf.host_name);
36 foreach(failed_rcpts, node) {
37 address *addr = (address *) (node->data);
38 if (addr_isequal_parent(addr, ret_path)) {
39 logwrite(LOG_ALERT, "%s == %s: postmaster address failed\n", msg->uid, addr_string(ret_path));
40 return FALSE;
41 }
42 }
43 } else
44 ret_path = copy_address(msg->return_path);
45
46 DEBUG(1) debugf("sending failure notice to %s.\n", addr_string(ret_path));
47
48 if (template) {
49 FILE *file;
50 GList *var_table = var_table_conf(var_table_msg(NULL, msg));
51 gchar *err_msg = g_strdup_vprintf(err_fmt, args);
52
53 var_table = g_list_prepend(var_table, create_pair_string("err_msg", err_msg));
54 g_free(err_msg);
55
56 if ((file = fopen(template, "r"))) {
57 FILE *out;
58 gchar *cmd;
59 pid_t pid;
60
61 cmd = g_strdup_printf(SBINDIR "/masqmail -oi -f <> %s@%s", ret_path->local_part, ret_path->domain);
62 if ((out = peidopen(cmd, "w", environ, &pid, conf.mail_uid, conf.mail_gid))) {
63 gchar fmt[256], line[256];
64 int status, ret;
65
66 while ((ret = read_sockline(file, fmt, 256, 0, 0)) > 0) {
67 if (fmt[0] == '@') {
68 GList *node;
69 if (strncmp(fmt, "@failed_rcpts", 13) == 0) {
70 foreach(failed_rcpts, node) {
71 address *rcpt = (address *) (node->data);
72 fprintf(out, "\t%s\n", addr_string(rcpt));
73 }
74 } else if (strncmp(fmt, "@msg_headers", 12) == 0) {
75 foreach(msg->hdr_list, node) {
76 header *hdr = (header *) (node->data);
77 fputs(hdr->header, out);
78 }
79 } else if (strncmp(fmt, "@msg_body", 9) == 0) {
80 /* we may have to read the data at this point and remember if we did */
81 gboolean flag = (msg->data_list == NULL);
82 if (flag) {
83 if (!spool_read_data(msg)) {
84 logwrite(LOG_ALERT, "could not open data spool file %s\n", msg->uid);
85 }
86 }
87 foreach(msg->data_list, node) {
88 gchar *line = (gchar *) (node->data);
89 fputs(line, out);
90 }
91 if (flag)
92 msg_free_data(msg);
93 }
94 } else {
95 expand(var_table, fmt, line, 256);
96 fputs(line, out);
97 }
98 }
99
100 fclose(out);
101 waitpid(pid, &status, 0);
102 if ((WEXITSTATUS(status) != EXIT_SUCCESS) || WIFSIGNALED(status)) {
103 if (WEXITSTATUS(status) != EXIT_SUCCESS)
104 logwrite(LOG_WARNING, "child returned %d\n", WEXITSTATUS(status));
105 if (WIFSIGNALED(status))
106 logwrite(LOG_WARNING, "child got signal: %d\n", WTERMSIG(status));
107 } else
108 ok = TRUE;
109 } else {
110 logwrite(LOG_ERR, "peopen failed: %s\n", strerror(errno));
111 }
112 g_free(cmd);
113 fclose(file);
114 } else
115 logwrite(LOG_ALERT, "could not open failure message template %s: %s\n", conf.errmsg_file, strerror(errno));
116
117 destroy_table(var_table);
118 }
119
120 destroy_address(ret_path);
121
122 return ok;
123 }
124
125 /*
126 ival : |--|--|----|--------|--------|
127 warned: |-------W-------------W------
128 result: |nnnyyyynnnnyyyyyyyyyynnnnnnn
129 */
130
131 static gboolean
132 warn_msg_is_due(message * msg)
133 {
134 time_t now = time(NULL);
135 gint dummy;
136
137 GList *node;
138 for (node = g_list_last(conf.warn_intervals); node; node = g_list_previous(node)) {
139 gchar *str_ival = (gchar *) (node->data);
140 gint ival = time_interval(str_ival, &dummy);
141 if (ival >= 0) {
142 DEBUG(5) debugf("ival = %d\n", ival);
143 DEBUG(5) debugf("now - msg->received_time = %d\n", now - msg->received_time);
144 if ((now - msg->received_time) > ival) {
145 if (msg->warned_time != 0) {
146 if ((msg->warned_time - msg->received_time) < ival)
147 return TRUE;
148 } else
149 return TRUE;
150 }
151 } else
152 logwrite(LOG_WARNING, "invalid time interval: %s\n", str_ival);
153 }
154 return FALSE;
155 }
156
157 gboolean
158 warn_msg(message * msg, gchar * template, GList * defered_rcpts, gchar * err_fmt, va_list args)
159 {
160 time_t now = time(NULL);
161
162 if (warn_msg_is_due(msg)) {
163 if (fail_msg(msg, template, defered_rcpts, err_fmt, args)) {
164 msg->warned_time = now;
165 return TRUE;
166 } else
167 return FALSE;
168 }
169 return TRUE;
170 }