1 /* $Cambridge: exim/src/src/spool_mbox.c,v 1.11 2006/02/22 14:46:44 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */
10 /* Code for setting up a MBOX style spool file inside a /scan/<msgid>
11 sub directory of exim's spool directory. */
14 #ifdef WITH_CONTENT_SCAN
16 /* externals, we must reset them on unspooling */
17 #ifdef WITH_OLD_DEMIME
19 extern struct file_extension
*file_extensions
;
22 extern int malware_ok
;
25 int spool_mbox_ok
= 0;
26 uschar spooled_message_id
[17];
28 /* returns a pointer to the FILE, and puts the size in bytes into mbox_file_size */
30 FILE *spool_mbox(unsigned long *mbox_file_size
) {
31 uschar mbox_path
[1024];
32 uschar message_subdir
[2];
33 uschar data_buffer
[65535];
35 FILE *data_file
= NULL
;
36 header_line
*my_headerlist
;
39 uschar
*mbox_delimiter
;
40 uschar
*envelope_from
;
44 /* create scan directory, if not present */
45 if (!directory_make(spool_directory
, US
"scan", 0750, FALSE
)) {
46 debug_printf("unable to create directory: %s/scan\n", spool_directory
);
50 /* create temp directory inside scan dir */
51 (void)string_format(mbox_path
, 1024, "%s/scan/%s", spool_directory
, message_id
);
52 if (!directory_make(NULL
, mbox_path
, 0750, FALSE
)) {
53 debug_printf("unable to create directory: %s/scan/%s\n", spool_directory
, message_id
);
57 /* open [message_id].eml file for writing */
58 (void)string_format(mbox_path
, 1024, "%s/scan/%s/%s.eml", spool_directory
, message_id
, message_id
);
59 mbox_file
= modefopen(mbox_path
,"wb",SPOOL_MODE
);
61 if (mbox_file
== NULL
) {
62 debug_printf("unable to open file for writing: %s\n", mbox_path
);
66 /* Generate mailbox delimiter */
67 mbox_delimiter
= expand_string(US
"From ${sender_address} ${tod_bsdinbox}\n");
68 if (mbox_delimiter
!= NULL
) {
69 if (mbox_delimiter
[0] != 0) {
70 i
= fwrite(mbox_delimiter
, 1, Ustrlen(mbox_delimiter
), mbox_file
);
71 if (i
!= Ustrlen(mbox_delimiter
)) {
72 debug_printf("error/short write on writing in: %s", mbox_path
);
73 (void)fclose(mbox_file
);
78 /* Generate X-Envelope-From header */
79 envelope_from
= expand_string(US
"${sender_address}");
80 if (envelope_from
!= NULL
) {
81 if (envelope_from
[0] != 0) {
82 uschar
*my_envelope_from
;
83 my_envelope_from
= string_sprintf("X-Envelope-From: <%s>\n", envelope_from
);
84 i
= fwrite(my_envelope_from
, 1, Ustrlen(my_envelope_from
), mbox_file
);
85 if (i
!= Ustrlen(my_envelope_from
)) {
86 debug_printf("error/short write on writing in: %s", mbox_path
);
87 (void)fclose(mbox_file
);
92 /* Generate X-Envelope-To header */
93 envelope_to
= expand_string(US
"${if def:received_for{$received_for}}");
94 if (envelope_to
!= NULL
) {
95 if (envelope_to
[0] != 0) {
96 uschar
*my_envelope_to
;
97 my_envelope_to
= string_sprintf("X-Envelope-To: <%s>\n", envelope_to
);
98 i
= fwrite(my_envelope_to
, 1, Ustrlen(my_envelope_to
), mbox_file
);
99 if (i
!= Ustrlen(my_envelope_to
)) {
100 debug_printf("error/short write on writing in: %s", mbox_path
);
101 (void)fclose(mbox_file
);
107 /* write all header lines to mbox file */
108 my_headerlist
= header_list
;
109 while (my_headerlist
!= NULL
) {
111 /* skip deleted headers */
112 if (my_headerlist
->type
== '*') {
113 my_headerlist
= my_headerlist
->next
;
117 i
= fwrite(my_headerlist
->text
, 1, my_headerlist
->slen
, mbox_file
);
118 if (i
!= my_headerlist
->slen
) {
119 debug_printf("error/short write on writing in: %s", mbox_path
);
120 (void)fclose(mbox_file
);
124 my_headerlist
= my_headerlist
->next
;
128 message_subdir
[1] = '\0';
129 for (i
= 0; i
< 2; i
++) {
130 message_subdir
[0] = (split_spool_directory
== (i
== 0))? message_id
[5] : 0;
131 sprintf(CS mbox_path
, "%s/input/%s/%s-D", spool_directory
, message_subdir
, message_id
);
132 data_file
= Ufopen(mbox_path
,"rb");
133 if (data_file
!= NULL
)
137 /* The code used to use this line, but it doesn't work in Cygwin.
139 * (void)fread(data_buffer, 1, 18, data_file);
141 * What's happening is that spool_mbox used to use an fread to jump over the
142 * file header. That fails under Cygwin because the header is locked, but
143 * doing an fseek succeeds. We have to output the leading newline
144 * explicitly, because the one in the file is parted of the locked area.
147 (void)fwrite("\n", 1, 1, mbox_file
);
148 (void)fseek(data_file
, SPOOL_DATA_START_OFFSET
, SEEK_SET
);
151 j
= fread(data_buffer
, 1, sizeof(data_buffer
), data_file
);
154 i
= fwrite(data_buffer
, 1, j
, mbox_file
);
156 debug_printf("error/short write on writing in: %s", mbox_path
);
157 (void)fclose(mbox_file
);
158 (void)fclose(data_file
);
164 (void)fclose(data_file
);
165 (void)fclose(mbox_file
);
166 Ustrcpy(spooled_message_id
, message_id
);
170 (void)string_format(mbox_path
, 1024, "%s/scan/%s/%s.eml", spool_directory
, message_id
, message_id
);
172 /* get the size of the mbox message */
173 stat(CS mbox_path
, &statbuf
);
174 *mbox_file_size
= statbuf
.st_size
;
176 /* open [message_id].eml file for reading */
177 mbox_file
= Ufopen(mbox_path
,"rb");
182 /* remove mbox spool file, demimed files and temp directory */
183 void unspool_mbox(void) {
185 /* reset all exiscan state variables */
186 #ifdef WITH_OLD_DEMIME
188 demime_errorlevel
= 0;
189 demime_reason
= NULL
;
190 file_extensions
= NULL
;
200 if (!no_mbox_unspool
) {
201 uschar mbox_path
[1024];
202 uschar file_path
[1024];
204 struct dirent
*entry
;
207 (void)string_format(mbox_path
, 1024, "%s/scan/%s", spool_directory
, spooled_message_id
);
209 tempdir
= opendir(CS mbox_path
);
210 /* loop thru dir & delete entries */
213 entry
= readdir(tempdir
);
214 if (entry
== NULL
) break;
215 (void)string_format(file_path
, 1024,"%s/scan/%s/%s", spool_directory
, spooled_message_id
, entry
->d_name
);
216 if ( (Ustrcmp(entry
->d_name
,"..") != 0) && (Ustrcmp(entry
->d_name
,".") != 0) ) {
217 debug_printf("unspool_mbox(): unlinking '%s'\n", file_path
);
218 n
= unlink(CS file_path
);
224 /* remove directory */
225 n
= rmdir(CS mbox_path
);