Commit | Line | Data |
---|---|---|
b07e6aa3 | 1 | /* $Cambridge: exim/src/src/spool_mbox.c,v 1.10 2005/08/01 14:41:25 ph10 Exp $ */ |
8523533c TK |
2 | |
3 | /************************************************* | |
4 | * Exim - an Internet mail transport agent * | |
5 | *************************************************/ | |
6 | ||
7 | /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003-???? */ | |
8 | /* License: GPL */ | |
9 | ||
10 | /* Code for setting up a MBOX style spool file inside a /scan/<msgid> | |
11 | sub directory of exim's spool directory. */ | |
12 | ||
13 | #include "exim.h" | |
14 | #ifdef WITH_CONTENT_SCAN | |
15 | ||
16 | /* externals, we must reset them on unspooling */ | |
17 | #ifdef WITH_OLD_DEMIME | |
18 | extern int demime_ok; | |
19 | extern struct file_extension *file_extensions; | |
20 | #endif | |
21 | ||
22 | extern int malware_ok; | |
23 | extern int spam_ok; | |
24 | ||
25 | int spool_mbox_ok = 0; | |
26 | uschar spooled_message_id[17]; | |
27 | ||
28 | /* returns a pointer to the FILE, and puts the size in bytes into mbox_file_size */ | |
29 | ||
f7b63901 | 30 | FILE *spool_mbox(unsigned long *mbox_file_size) { |
8523533c TK |
31 | uschar mbox_path[1024]; |
32 | uschar message_subdir[2]; | |
33 | uschar data_buffer[65535]; | |
34 | FILE *mbox_file; | |
35 | FILE *data_file = NULL; | |
36 | header_line *my_headerlist; | |
37 | struct stat statbuf; | |
38 | int i,j; | |
7e274b4b TK |
39 | uschar *mbox_delimiter; |
40 | uschar *envelope_from; | |
41 | uschar *envelope_to; | |
8e669ac1 | 42 | |
8523533c TK |
43 | if (!spool_mbox_ok) { |
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); | |
47 | return NULL; | |
48 | }; | |
8e669ac1 | 49 | |
8523533c | 50 | /* create temp directory inside scan dir */ |
b07e6aa3 | 51 | (void)string_format(mbox_path, 1024, "%s/scan/%s", spool_directory, message_id); |
8523533c TK |
52 | if (!directory_make(NULL, mbox_path, 0750, FALSE)) { |
53 | debug_printf("unable to create directory: %s/scan/%s\n", spool_directory, message_id); | |
54 | return NULL; | |
55 | }; | |
8e669ac1 | 56 | |
8523533c | 57 | /* open [message_id].eml file for writing */ |
b07e6aa3 | 58 | (void)string_format(mbox_path, 1024, "%s/scan/%s/%s.eml", spool_directory, message_id, message_id); |
c58b88df | 59 | mbox_file = Ufopen(mbox_path,"wb"); |
8e669ac1 | 60 | |
8523533c TK |
61 | if (mbox_file == NULL) { |
62 | debug_printf("unable to open file for writing: %s\n", mbox_path); | |
63 | return NULL; | |
64 | }; | |
8e669ac1 | 65 | |
7e274b4b TK |
66 | /* Generate mailbox delimiter */ |
67 | mbox_delimiter = expand_string(US"From ${sender_address} ${tod_bsdinbox}\n"); | |
68 | if (mbox_delimiter != NULL) { | |
69 | if (mbox_delimiter[0] != 0) { | |
70 | i = fwrite(mbox_delimiter, 1, Ustrlen(mbox_delimiter), mbox_file); | |
71 | if (i != Ustrlen(mbox_delimiter)) { | |
72 | debug_printf("error/short write on writing in: %s", mbox_path); | |
f1e894f3 | 73 | (void)fclose(mbox_file); |
7e274b4b TK |
74 | return NULL; |
75 | }; | |
76 | }; | |
77 | }; | |
78 | /* Generate X-Envelope-From header */ | |
79 | envelope_from = expand_string(US"${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); | |
f1e894f3 | 87 | (void)fclose(mbox_file); |
7e274b4b TK |
88 | return NULL; |
89 | }; | |
90 | }; | |
91 | }; | |
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); | |
f1e894f3 | 101 | (void)fclose(mbox_file); |
7e274b4b TK |
102 | return NULL; |
103 | }; | |
104 | }; | |
105 | }; | |
106 | ||
8523533c TK |
107 | /* write all header lines to mbox file */ |
108 | my_headerlist = header_list; | |
109 | while (my_headerlist != NULL) { | |
8e669ac1 | 110 | |
8523533c TK |
111 | /* skip deleted headers */ |
112 | if (my_headerlist->type == '*') { | |
113 | my_headerlist = my_headerlist->next; | |
114 | continue; | |
115 | }; | |
8e669ac1 | 116 | |
8523533c TK |
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); | |
f1e894f3 | 120 | (void)fclose(mbox_file); |
8523533c TK |
121 | return NULL; |
122 | }; | |
8e669ac1 | 123 | |
8523533c TK |
124 | my_headerlist = my_headerlist->next; |
125 | }; | |
8e669ac1 | 126 | |
8523533c TK |
127 | /* copy body file */ |
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); | |
c58b88df | 132 | data_file = Ufopen(mbox_path,"rb"); |
8523533c TK |
133 | if (data_file != NULL) |
134 | break; | |
135 | }; | |
136 | ||
5b68f6e4 PH |
137 | /* The code used to use this line, but it doesn't work in Cygwin. |
138 | * | |
139 | * (void)fread(data_buffer, 1, 18, data_file); | |
140 | * | |
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. | |
145 | */ | |
146 | ||
147 | (void)fwrite("\n", 1, 1, mbox_file); | |
148 | (void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET); | |
8e669ac1 | 149 | |
8523533c TK |
150 | do { |
151 | j = fread(data_buffer, 1, sizeof(data_buffer), data_file); | |
5b68f6e4 | 152 | |
8523533c TK |
153 | if (j > 0) { |
154 | i = fwrite(data_buffer, 1, j, mbox_file); | |
155 | if (i != j) { | |
156 | debug_printf("error/short write on writing in: %s", mbox_path); | |
f1e894f3 PH |
157 | (void)fclose(mbox_file); |
158 | (void)fclose(data_file); | |
8523533c TK |
159 | return NULL; |
160 | }; | |
161 | }; | |
162 | } while (j > 0); | |
8e669ac1 | 163 | |
f1e894f3 PH |
164 | (void)fclose(data_file); |
165 | (void)fclose(mbox_file); | |
8523533c TK |
166 | Ustrcpy(spooled_message_id, message_id); |
167 | spool_mbox_ok = 1; | |
168 | }; | |
169 | ||
b07e6aa3 | 170 | (void)string_format(mbox_path, 1024, "%s/scan/%s/%s.eml", spool_directory, message_id, message_id); |
8523533c TK |
171 | |
172 | /* get the size of the mbox message */ | |
173 | stat(CS mbox_path, &statbuf); | |
174 | *mbox_file_size = statbuf.st_size; | |
175 | ||
176 | /* open [message_id].eml file for reading */ | |
c58b88df | 177 | mbox_file = Ufopen(mbox_path,"rb"); |
8e669ac1 | 178 | |
8523533c TK |
179 | return mbox_file; |
180 | } | |
181 | ||
182 | /* remove mbox spool file, demimed files and temp directory */ | |
183 | void unspool_mbox(void) { | |
184 | ||
185 | /* reset all exiscan state variables */ | |
186 | #ifdef WITH_OLD_DEMIME | |
187 | demime_ok = 0; | |
188 | demime_errorlevel = 0; | |
189 | demime_reason = NULL; | |
190 | file_extensions = NULL; | |
191 | #endif | |
8e669ac1 | 192 | |
8523533c TK |
193 | spam_ok = 0; |
194 | malware_ok = 0; | |
8e669ac1 | 195 | |
8523533c TK |
196 | if (spool_mbox_ok) { |
197 | ||
198 | spool_mbox_ok = 0; | |
8e669ac1 | 199 | |
8523533c TK |
200 | if (!no_mbox_unspool) { |
201 | uschar mbox_path[1024]; | |
202 | uschar file_path[1024]; | |
203 | int n; | |
204 | struct dirent *entry; | |
205 | DIR *tempdir; | |
8e669ac1 | 206 | |
b07e6aa3 | 207 | (void)string_format(mbox_path, 1024, "%s/scan/%s", spool_directory, spooled_message_id); |
8e669ac1 | 208 | |
384152a6 TK |
209 | tempdir = opendir(CS mbox_path); |
210 | /* loop thru dir & delete entries */ | |
211 | n = 0; | |
212 | do { | |
213 | entry = readdir(tempdir); | |
214 | if (entry == NULL) break; | |
b07e6aa3 | 215 | (void)string_format(file_path, 1024,"%s/scan/%s/%s", spool_directory, spooled_message_id, entry->d_name); |
384152a6 TK |
216 | if ( (Ustrcmp(entry->d_name,"..") != 0) && (Ustrcmp(entry->d_name,".") != 0) ) { |
217 | debug_printf("unspool_mbox(): unlinking '%s'\n", file_path); | |
8523533c | 218 | n = unlink(CS file_path); |
8e669ac1 | 219 | }; |
384152a6 | 220 | } while (n > -1); |
8e669ac1 | 221 | |
384152a6 | 222 | closedir(tempdir); |
8e669ac1 | 223 | |
384152a6 TK |
224 | /* remove directory */ |
225 | n = rmdir(CS mbox_path); | |
8523533c TK |
226 | }; |
227 | }; | |
228 | } | |
229 | ||
230 | #endif |