camel/providers/sendmail/camel-sendmail-transport.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /* camel-sendmail-transport.c: Sendmail-based transport class. */
   3
   4 /*
   5  *
   6  * Authors: Dan Winship <danw@ximian.com>
   7  *
   8  * Copyright 2000 Ximian, Inc. (www.ximian.com)
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of version 2 of the GNU Lesser General Public
  12  * License as published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
  22  * USA
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #endif
  28
  29 #include <errno.h>
  30 #include <fcntl.h>
  31 #include <signal.h>
  32 #include <string.h>
  33 #include <unistd.h>
  34 #include <sys/wait.h>
  35
  36 #include <glib/gi18n-lib.h>
  37
  38 #include "camel-data-wrapper.h"
  39 #include "camel-exception.h"
  40 #include "camel-mime-filter-crlf.h"
  41 #include "camel-mime-message.h"
  42 #include "camel-sendmail-transport.h"
  43 #include "camel-stream-filter.h"
  44 #include "camel-stream-fs.h"
  45
  46 static char *get_name (CamelService *service, gboolean brief);
  47
  48 static gboolean sendmail_send_to (CamelTransport *transport,
  49                                   CamelMimeMessage *message,
  50                                   CamelAddress *from, CamelAddress *recipients,
  51                                   CamelException *ex);
  52
  53
  54 static void
  55 camel_sendmail_transport_class_init (CamelSendmailTransportClass *camel_sendmail_transport_class)
  56 {
  57         CamelTransportClass *camel_transport_class =
  58                 CAMEL_TRANSPORT_CLASS (camel_sendmail_transport_class);
  59         CamelServiceClass *camel_service_class =
  60                 CAMEL_SERVICE_CLASS (camel_sendmail_transport_class);
  61
  62         /* virtual method overload */
  63         camel_service_class->get_name = get_name;
  64         camel_transport_class->send_to = sendmail_send_to;
  65 }
  66
  67 CamelType
  68 camel_sendmail_transport_get_type (void)
  69 {
  70         static CamelType camel_sendmail_transport_type = CAMEL_INVALID_TYPE;
  71
  72         if (camel_sendmail_transport_type == CAMEL_INVALID_TYPE)        {
  73                 camel_sendmail_transport_type =
  74                         camel_type_register (CAMEL_TRANSPORT_TYPE, "CamelSendmailTransport",
  75                                              sizeof (CamelSendmailTransport),
  76                                              sizeof (CamelSendmailTransportClass),
  77                                              (CamelObjectClassInitFunc) camel_sendmail_transport_class_init,
  78                                              NULL,
  79                                              (CamelObjectInitFunc) NULL,
  80                                              NULL);
  81         }
  82
  83         return camel_sendmail_transport_type;
  84 }
  85
  86
  87 static gboolean
  88 sendmail_send_to (CamelTransport *transport, CamelMimeMessage *message,
  89                   CamelAddress *from, CamelAddress *recipients,
  90                   CamelException *ex)
  91 {
  92         struct _camel_header_raw *header, *savedbcc, *n, *tail;
  93         const char *from_addr, *addr, **argv;
  94         int i, len, fd[2], nullfd, wstat;
  95         CamelStreamFilter *filter;
  96         CamelMimeFilter *crlf;
  97         sigset_t mask, omask;
  98         CamelStream *out;
  99         pid_t pid;
 100
 101         if (!camel_internet_address_get (CAMEL_INTERNET_ADDRESS (from), 0, NULL, &from_addr))
 102                 return FALSE;
 103
 104         len = camel_address_length (recipients);
 105         argv = g_malloc ((len + 6) * sizeof (char *));
 106         argv[0] = "sendmail";
 107         argv[1] = "-i";
 108         argv[2] = "-f";
 109         argv[3] = from_addr;
 110         argv[4] = "--";
 111
 112         for (i = 0; i < len; i++) {
 113                 if (!camel_internet_address_get (CAMEL_INTERNET_ADDRESS (recipients), i, NULL, &addr)) {
 114                         camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
 115                                              _("Could not parse recipient list"));
 116                         g_free (argv);
 117                         return FALSE;
 118                 }
 119
 120                 argv[i + 5] = addr;
 121         }
 122
 123         argv[i + 5] = NULL;
 124
 125         /* unlink the bcc headers */
 126         savedbcc = NULL;
 127         tail = (struct _camel_header_raw *) &savedbcc;
 128
 129         header = (struct _camel_header_raw *) &CAMEL_MIME_PART (message)->headers;
 130         n = header->next;
 131         while (n != NULL) {
 132                 if (!g_ascii_strcasecmp (n->name, "Bcc")) {
 133                         header->next = n->next;
 134                         tail->next = n;
 135                         n->next = NULL;
 136                         tail = n;
 137                 } else {
 138                         header = n;
 139                 }
 140
 141                 n = header->next;
 142         }
 143
 144         if (pipe (fd) == -1) {
 145                 camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
 146                                       _("Could not create pipe to sendmail: "
 147                                         "%s: mail not sent"),
 148                                       g_strerror (errno));
 149
 150                 /* restore the bcc headers */
 151                 header->next = savedbcc;
 152
 153                 return FALSE;
 154         }
 155
 156         /* Block SIGCHLD so the calling application doesn't notice
 157          * sendmail exiting before we do.
 158          */
 159         sigemptyset (&mask);
 160         sigaddset (&mask, SIGCHLD);
 161         sigprocmask (SIG_BLOCK, &mask, &omask);
 162
 163         pid = fork ();
 164         switch (pid) {
 165         case -1:
 166                 camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
 167                                       _("Could not fork sendmail: "
 168                                         "%s: mail not sent"),
 169                                       g_strerror (errno));
 170                 close (fd[0]);
 171                 close (fd[1]);
 172                 sigprocmask (SIG_SETMASK, &omask, NULL);
 173                 g_free (argv);
 174
 175                 /* restore the bcc headers */
 176                 header->next = savedbcc;
 177
 178                 return FALSE;
 179         case 0:
 180                 /* Child process */
 181                 nullfd = open ("/dev/null", O_RDWR);
 182                 dup2 (fd[0], STDIN_FILENO);
 183                 /*dup2 (nullfd, STDOUT_FILENO);
 184                   dup2 (nullfd, STDERR_FILENO);*/
 185                 close (nullfd);
 186                 close (fd[1]);
 187
 188                 execv (SENDMAIL_PATH, (char **)argv);
 189                 _exit (255);
 190         }
 191         g_free (argv);
 192
 193         /* Parent process. Write the message out. */
 194         close (fd[0]);
 195         out = camel_stream_fs_new_with_fd (fd[1]);
 196
 197         /* workaround for lame sendmail implementations that can't handle CRLF eoln sequences */
 198         filter = camel_stream_filter_new_with_stream (out);
 199         crlf = camel_mime_filter_crlf_new (CAMEL_MIME_FILTER_CRLF_DECODE, CAMEL_MIME_FILTER_CRLF_MODE_CRLF_ONLY);
 200         camel_stream_filter_add (filter, crlf);
 201         camel_object_unref (crlf);
 202         camel_object_unref (out);
 203
 204         out = (CamelStream *) filter;
 205         if (camel_data_wrapper_write_to_stream (CAMEL_DATA_WRAPPER (message), out) == -1
 206             || camel_stream_close (out) == -1) {
 207                 camel_object_unref (CAMEL_OBJECT (out));
 208                 camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
 209                                       _("Could not send message: %s"),
 210                                       g_strerror (errno));
 211
 212                 /* Wait for sendmail to exit. */
 213                 while (waitpid (pid, &wstat, 0) == -1 && errno == EINTR)
 214                         ;
 215
 216                 sigprocmask (SIG_SETMASK, &omask, NULL);
 217
 218                 /* restore the bcc headers */
 219                 header->next = savedbcc;
 220
 221                 return FALSE;
 222         }
 223
 224         camel_object_unref (CAMEL_OBJECT (out));
 225
 226         /* Wait for sendmail to exit. */
 227         while (waitpid (pid, &wstat, 0) == -1 && errno == EINTR)
 228                 ;
 229
 230         sigprocmask (SIG_SETMASK, &omask, NULL);
 231
 232         /* restore the bcc headers */
 233         header->next = savedbcc;
 234
 235         if (!WIFEXITED (wstat)) {
 236                 camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
 237                                       _("sendmail exited with signal %s: "
 238                                         "mail not sent."),
 239                                       g_strsignal (WTERMSIG (wstat)));
 240                 return FALSE;
 241         } else if (WEXITSTATUS (wstat) != 0) {
 242                 if (WEXITSTATUS (wstat) == 255) {
 243                         camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
 244                                               _("Could not execute %s: "
 245                                                 "mail not sent."),
 246                                               SENDMAIL_PATH);
 247                 } else {
 248                         camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
 249                                               _("sendmail exited with status "
 250                                                 "%d: mail not sent."),
 251                                               WEXITSTATUS (wstat));
 252                 }
 253                 return FALSE;
 254         }
 255
 256         return TRUE;
 257 }
 258
 259 static char *
 260 get_name (CamelService *service, gboolean brief)
 261 {
 262         if (brief)
 263                 return g_strdup (_("sendmail"));
 264         else
 265                 return g_strdup (_("Mail delivery via the sendmail program"));
 266 }