Commit | Line | Data |
---|---|---|
8523533c TK |
1 | /************************************************* |
2 | * Exim - an Internet mail transport agent * | |
3 | *************************************************/ | |
4 | ||
80fea873 JH |
5 | /* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2003 - 2015 |
6 | * License: GPL | |
7 | * Copyright (c) The Exim Maintainers 2016 | |
8 | */ | |
8523533c TK |
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 | ||
8523533c TK |
16 | extern int malware_ok; |
17 | extern int spam_ok; | |
18 | ||
19 | int spool_mbox_ok = 0; | |
6e3b198d | 20 | uschar spooled_message_id[MESSAGE_ID_LENGTH+1]; |
8523533c | 21 | |
8544e77a PP |
22 | /* returns a pointer to the FILE, and puts the size in bytes into mbox_file_size |
23 | * normally, source_file_override is NULL */ | |
8523533c | 24 | |
0f0c8159 JH |
25 | FILE * |
26 | spool_mbox(unsigned long *mbox_file_size, const uschar *source_file_override) | |
27 | { | |
3c51463e JH |
28 | uschar message_subdir[2]; |
29 | uschar buffer[16384]; | |
30 | uschar *temp_string; | |
31 | uschar *mbox_path; | |
32 | FILE *mbox_file = NULL; | |
33 | FILE *data_file = NULL; | |
34 | FILE *yield = NULL; | |
35 | header_line *my_headerlist; | |
36 | struct stat statbuf; | |
37 | int i, j; | |
38 | void *reset_point = store_get(0); | |
39 | ||
40 | mbox_path = string_sprintf("%s/scan/%s/%s.eml", spool_directory, message_id, | |
41 | message_id); | |
42 | ||
43 | /* Skip creation if already spooled out as mbox file */ | |
44 | if (!spool_mbox_ok) | |
45 | { | |
46 | /* create temp directory inside scan dir, directory_make works recursively */ | |
47 | temp_string = string_sprintf("scan/%s", message_id); | |
48 | if (!directory_make(spool_directory, temp_string, 0750, FALSE)) | |
49 | { | |
50 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", string_open_failed(errno, | |
51 | "scan directory %s/scan/%s", spool_directory, temp_string)); | |
52 | goto OUT; | |
53 | } | |
8e669ac1 | 54 | |
3c51463e JH |
55 | /* open [message_id].eml file for writing */ |
56 | mbox_file = modefopen(mbox_path, "wb", SPOOL_MODE); | |
57 | if (mbox_file == NULL) | |
58 | { | |
59 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", string_open_failed(errno, | |
60 | "scan file %s", mbox_path)); | |
61 | goto OUT; | |
62 | } | |
63 | ||
64 | /* Generate mailbox headers. The $received_for variable is (up to at least | |
65 | Exim 4.64) never set here, because it is only set when expanding the | |
66 | contents of the Received: header line. However, the code below will use it | |
67 | if it should become available in future. */ | |
68 | ||
69 | temp_string = expand_string( | |
70 | US"From ${if def:return_path{$return_path}{MAILER-DAEMON}} ${tod_bsdinbox}\n" | |
71 | "${if def:sender_address{X-Envelope-From: <${sender_address}>\n}}" | |
72 | "${if def:recipients{X-Envelope-To: ${recipients}\n}}"); | |
73 | ||
74 | if (temp_string != NULL) | |
f951fd57 | 75 | { |
3c51463e JH |
76 | i = fwrite(temp_string, Ustrlen(temp_string), 1, mbox_file); |
77 | if (i != 1) | |
78 | { | |
1ac6b2e7 | 79 | log_write(0, LOG_MAIN|LOG_PANIC, "Error/short write while writing \ |
3c51463e | 80 | mailbox headers to %s", mbox_path); |
1ac6b2e7 | 81 | goto OUT; |
3c51463e | 82 | } |
1ac6b2e7 | 83 | } |
f951fd57 | 84 | |
3c51463e JH |
85 | /* write all header lines to mbox file */ |
86 | my_headerlist = header_list; | |
87 | for (my_headerlist = header_list; my_headerlist != NULL; | |
88 | my_headerlist = my_headerlist->next) | |
89 | { | |
90 | /* skip deleted headers */ | |
91 | if (my_headerlist->type == '*') continue; | |
92 | ||
93 | i = fwrite(my_headerlist->text, my_headerlist->slen, 1, mbox_file); | |
94 | if (i != 1) | |
95 | { | |
96 | log_write(0, LOG_MAIN|LOG_PANIC, "Error/short write while writing \ | |
97 | message headers to %s", mbox_path); | |
f951fd57 | 98 | goto OUT; |
3c51463e JH |
99 | } |
100 | } | |
8e669ac1 | 101 | |
3c51463e JH |
102 | /* End headers */ |
103 | if (fwrite("\n", 1, 1, mbox_file) != 1) | |
104 | { | |
105 | log_write(0, LOG_MAIN|LOG_PANIC, "Error/short write while writing \ | |
106 | message headers to %s", mbox_path); | |
107 | goto OUT; | |
108 | } | |
21a04aa3 | 109 | |
3c51463e JH |
110 | /* copy body file */ |
111 | if (source_file_override == NULL) | |
112 | { | |
113 | message_subdir[1] = '\0'; | |
114 | for (i = 0; i < 2; i++) | |
115 | { | |
a2da3176 JH |
116 | message_subdir[0] = split_spool_directory == (i == 0) ? message_id[5] : 0; |
117 | temp_string = string_sprintf("%s/input/%s/%s/%s-D", | |
118 | spool_directory, queue_name, message_subdir, message_id); | |
119 | if ((data_file = Ufopen(temp_string, "rb"))) break; | |
3c51463e JH |
120 | } |
121 | } | |
122 | else | |
123 | data_file = Ufopen(source_file_override, "rb"); | |
8523533c | 124 | |
a2da3176 | 125 | if (!data_file) |
3c51463e JH |
126 | { |
127 | log_write(0, LOG_MAIN|LOG_PANIC, "Could not open datafile for message %s", | |
128 | message_id); | |
f951fd57 | 129 | goto OUT; |
3c51463e JH |
130 | } |
131 | ||
132 | /* The code used to use this line, but it doesn't work in Cygwin. | |
8523533c | 133 | |
3c51463e JH |
134 | (void)fread(data_buffer, 1, 18, data_file); |
135 | ||
136 | What's happening is that spool_mbox used to use an fread to jump over the | |
137 | file header. That fails under Cygwin because the header is locked, but | |
138 | doing an fseek succeeds. We have to output the leading newline | |
139 | explicitly, because the one in the file is parted of the locked area. */ | |
8523533c | 140 | |
3c51463e JH |
141 | if (!source_file_override) |
142 | (void)fseek(data_file, SPOOL_DATA_START_OFFSET, SEEK_SET); | |
143 | ||
144 | do | |
145 | { | |
146 | j = fread(buffer, 1, sizeof(buffer), data_file); | |
147 | ||
148 | if (j > 0) | |
149 | { | |
150 | i = fwrite(buffer, j, 1, mbox_file); | |
151 | if (i != 1) | |
152 | { | |
153 | log_write(0, LOG_MAIN|LOG_PANIC, "Error/short write while writing \ | |
154 | message body to %s", mbox_path); | |
155 | goto OUT; | |
156 | } | |
157 | } | |
158 | } while (j > 0); | |
159 | ||
160 | (void)fclose(mbox_file); | |
161 | mbox_file = NULL; | |
162 | ||
8d468c4c JH |
163 | Ustrncpy(spooled_message_id, message_id, sizeof(spooled_message_id)); |
164 | spooled_message_id[sizeof(spooled_message_id)-1] = '\0'; | |
3c51463e JH |
165 | spool_mbox_ok = 1; |
166 | } | |
167 | ||
168 | /* get the size of the mbox message and open [message_id].eml file for reading*/ | |
169 | if (Ustat(mbox_path, &statbuf) != 0 || | |
170 | (yield = Ufopen(mbox_path,"rb")) == NULL) | |
171 | { | |
172 | log_write(0, LOG_MAIN|LOG_PANIC, "%s", string_open_failed(errno, | |
173 | "scan file %s", mbox_path)); | |
174 | goto OUT; | |
175 | } | |
176 | ||
177 | *mbox_file_size = statbuf.st_size; | |
178 | ||
179 | OUT: | |
180 | if (data_file) (void)fclose(data_file); | |
181 | if (mbox_file) (void)fclose(mbox_file); | |
182 | store_reset(reset_point); | |
183 | return yield; | |
8523533c TK |
184 | } |
185 | ||
3c51463e JH |
186 | |
187 | ||
188 | ||
8e669ac1 | 189 | |
03d5892b | 190 | /* remove mbox spool file and temp directory */ |
3c51463e JH |
191 | void |
192 | unspool_mbox(void) | |
193 | { | |
3c51463e JH |
194 | spam_ok = 0; |
195 | malware_ok = 0; | |
8e669ac1 | 196 | |
3c51463e JH |
197 | if (spool_mbox_ok && !no_mbox_unspool) |
198 | { | |
199 | uschar *mbox_path; | |
200 | uschar *file_path; | |
201 | int n; | |
202 | struct dirent *entry; | |
203 | DIR *tempdir; | |
204 | ||
205 | mbox_path = string_sprintf("%s/scan/%s", spool_directory, spooled_message_id); | |
206 | ||
207 | tempdir = opendir(CS mbox_path); | |
208 | if (!tempdir) | |
209 | { | |
210 | debug_printf("Unable to opendir(%s): %s\n", mbox_path, strerror(errno)); | |
211 | /* Just in case we still can: */ | |
f951fd57 | 212 | rmdir(CS mbox_path); |
3c51463e JH |
213 | return; |
214 | } | |
215 | /* loop thru dir & delete entries */ | |
216 | while((entry = readdir(tempdir)) != NULL) | |
217 | { | |
218 | uschar *name = US entry->d_name; | |
219 | if (Ustrcmp(name, US".") == 0 || Ustrcmp(name, US"..") == 0) continue; | |
220 | ||
221 | file_path = string_sprintf("%s/%s", mbox_path, name); | |
222 | debug_printf("unspool_mbox(): unlinking '%s'\n", file_path); | |
223 | n = unlink(CS file_path); | |
224 | } | |
225 | ||
226 | closedir(tempdir); | |
227 | ||
228 | /* remove directory */ | |
229 | rmdir(CS mbox_path); | |
230 | store_reset(mbox_path); | |
231 | } | |
232 | spool_mbox_ok = 0; | |
8523533c TK |
233 | } |
234 | ||
235 | #endif |