blob: 1dadd715f4abcb672bb9fe2fc431184fb0e355fa
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * makemime: create MIME-encoded message |
4 | * |
5 | * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com> |
6 | * |
7 | * Licensed under GPLv2, see file LICENSE in this source tree. |
8 | */ |
9 | |
10 | //kbuild:lib-$(CONFIG_MAKEMIME) += makemime.o mail.o |
11 | |
12 | #include "libbb.h" |
13 | #include "mail.h" |
14 | |
15 | #if 0 |
16 | # define dbg_error_msg(...) bb_error_msg(__VA_ARGS__) |
17 | #else |
18 | # define dbg_error_msg(...) ((void)0) |
19 | #endif |
20 | |
21 | /* |
22 | makemime -c type [-o file] [-e encoding] [-C charset] [-N name] \ |
23 | [-a "Header: Contents"] file |
24 | -m [ type ] [-o file] [-e encoding] [-a "Header: Contents"] file |
25 | -j [-o file] file1 file2 |
26 | @file |
27 | |
28 | file: filename - read or write from filename |
29 | - - read or write from stdin or stdout |
30 | &n - read or write from file descriptor n |
31 | \( opts \) - read from child process, that generates [ opts ] |
32 | |
33 | Options: |
34 | -c type - create a new MIME section from "file" with this |
35 | Content-Type: (default is application/octet-stream). |
36 | -C charset - MIME charset of a new text/plain section. |
37 | -N name - MIME content name of the new mime section. |
38 | -m [ type ] - create a multipart mime section from "file" of this |
39 | Content-Type: (default is multipart/mixed). |
40 | -e encoding - use the given encoding (7bit, 8bit, quoted-printable, |
41 | or base64), instead of guessing. Omit "-e" and use |
42 | -c auto to set Content-Type: to text/plain or |
43 | application/octet-stream based on picked encoding. |
44 | -j file1 file2 - join mime section file2 to multipart section file1. |
45 | -o file - write the result to file, instead of stdout (not |
46 | allowed in child processes). |
47 | -a header - prepend an additional header to the output. |
48 | |
49 | @file - read all of the above options from file, one option or |
50 | value on each line. |
51 | {which version of makemime is this? What do we support?} |
52 | */ |
53 | /* man makemime: |
54 | |
55 | * -c TYPE: create a (non-multipart) MIME section with Content-Type: TYPE |
56 | * makemime -c TYPE [-e ENCODING] [-o OUTFILE] [-C CHARSET] [-N NAME] [-a HEADER...] FILE |
57 | * The -C option sets the MIME charset attribute for text/plain content. |
58 | * The -N option sets the name attribute for Content-Type: |
59 | * Encoding must be one of the following: 7bit, 8bit, quoted-printable, or base64. |
60 | |
61 | * -m multipart/TYPE: create a multipart MIME collection with Content-Type: multipart/TYPE |
62 | * makemime -m multipart/TYPE [-e ENCODING] [-o OUTFILE] [-a HEADER...] FILE |
63 | * Type must be either "multipart/mixed", "multipart/alternative", or some other MIME multipart content type. |
64 | * Additionally, encoding can only be "7bit" or "8bit", and will default to "8bit" if not specified. |
65 | * Finally, filename must be a MIME-formatted section, NOT a regular file. |
66 | * The -m option creates an initial multipart MIME collection, that contains only one MIME section, taken from filename. |
67 | * The collection is written to standard output, or the pipe or to outputfile. |
68 | |
69 | * -j FILE1: add a section to a multipart MIME collection |
70 | * makemime -j FILE1 [-o OUTFILE] FILE2 |
71 | * FILE1 must be a MIME collection that was previously created by the -m option. |
72 | * FILE2 must be a MIME section that was previously created by the -c option. |
73 | * The -j options adds the MIME section in FILE2 to the MIME collection in FILE1. |
74 | */ |
75 | |
76 | |
77 | /* In busybox 1.15.0.svn, makemime generates output like this |
78 | * (empty lines are shown exactly!): |
79 | {headers added with -a HDR} |
80 | Mime-Version: 1.0 |
81 | Content-Type: multipart/mixed; boundary="24269534-2145583448-1655890676" |
82 | |
83 | --24269534-2145583448-1655890676 |
84 | Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii} |
85 | Content-Disposition: inline; filename="A" |
86 | Content-Transfer-Encoding: base64 |
87 | |
88 | ...file A contents... |
89 | --24269534-2145583448-1655890676 |
90 | Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii} |
91 | Content-Disposition: inline; filename="B" |
92 | Content-Transfer-Encoding: base64 |
93 | |
94 | ...file B contents... |
95 | --24269534-2145583448-1655890676-- |
96 | |
97 | * |
98 | * For reference: here is an example email to LKML which has |
99 | * 1st unnamed part (so it serves as an email body) |
100 | * and one attached file: |
101 | ...other headers... |
102 | Content-Type: multipart/mixed; boundary="=-tOfTf3byOS0vZgxEWcX+" |
103 | ...other headers... |
104 | Mime-Version: 1.0 |
105 | ...other headers... |
106 | |
107 | |
108 | --=-tOfTf3byOS0vZgxEWcX+ |
109 | Content-Type: text/plain |
110 | Content-Transfer-Encoding: 7bit |
111 | |
112 | ...email text... |
113 | ...email text... |
114 | |
115 | |
116 | --=-tOfTf3byOS0vZgxEWcX+ |
117 | Content-Disposition: attachment; filename="xyz" |
118 | Content-Type: text/plain; name="xyz"; charset="UTF-8" |
119 | Content-Transfer-Encoding: 7bit |
120 | |
121 | ...file contents... |
122 | ...file contents... |
123 | |
124 | --=-tOfTf3byOS0vZgxEWcX+-- |
125 | |
126 | ...random junk added by mailing list robots and such... |
127 | */ |
128 | |
129 | //usage:#define makemime_trivial_usage |
130 | //usage: "[OPTIONS] [FILE]..." |
131 | //usage:#define makemime_full_usage "\n\n" |
132 | //usage: "Create multipart MIME-encoded message from FILEs\n" |
133 | /* //usage: "Transfer encoding is base64, disposition is inline (not attachment)\n" */ |
134 | //usage: "\n -o FILE Output. Default: stdout" |
135 | //usage: "\n -a HDR Add header(s). Examples:" |
136 | //usage: "\n \"From: user@host.org\", \"Date: `date -R`\"" |
137 | //usage: "\n -c CT Content type. Default: application/octet-stream" |
138 | //usage: "\n -C CS Charset. Default: " CONFIG_FEATURE_MIME_CHARSET |
139 | /* //usage: "\n -e ENC Transfer encoding. Ignored. base64 is assumed" */ |
140 | //usage: "\n" |
141 | //usage: "\nOther options are silently ignored" |
142 | |
143 | /* |
144 | * -c [Content-Type] should create just one MIME section |
145 | * with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR". |
146 | * NB: without "Content-Disposition:" auto-added, unlike we do now |
147 | * NB2: -c has *optional* param which nevertheless _can_ be specified after a space :( |
148 | * |
149 | * -m [multipart/mixed] should create multipart MIME section |
150 | * with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR", |
151 | * and add FILE to it _verbatim_: |
152 | * HEADERS |
153 | * |
154 | * --=_1_1321709112_1605 |
155 | * FILE_CONTENTS |
156 | * --=_1_1321709112_1605 |
157 | * without any encoding of FILE_CONTENTS. (Basically, it expects that FILE |
158 | * is the result of "makemime -c"). |
159 | * |
160 | * -j MULTIPART_FILE1 SINGLE_FILE2 should output MULTIPART_FILE1 + SINGLE_FILE2 |
161 | * |
162 | * Our current behavior is a mutant "-m + -c + -j" one: we create multipart MIME |
163 | * and we put "-c" encoded FILEs into many multipart sections. |
164 | */ |
165 | |
166 | int makemime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
167 | int makemime_main(int argc UNUSED_PARAM, char **argv) |
168 | { |
169 | llist_t *opt_headers = NULL, *l; |
170 | const char *opt_output; |
171 | const char *content_type = "application/octet-stream"; |
172 | #define boundary opt_output |
173 | enum { |
174 | OPT_c = 1 << 0, // create (non-multipart) section |
175 | OPT_e = 1 << 1, // Content-Transfer-Encoding. Ignored. Assumed base64 |
176 | OPT_o = 1 << 2, // output to |
177 | OPT_C = 1 << 3, // charset |
178 | OPT_N = 1 << 4, // COMPAT |
179 | OPT_a = 1 << 5, // additional headers |
180 | //OPT_m = 1 << 6, // create mutipart section |
181 | //OPT_j = 1 << 7, // join section to multipart section |
182 | }; |
183 | |
184 | INIT_G(); |
185 | |
186 | // parse options |
187 | opt_complementary = "a::"; |
188 | opts = getopt32(argv, |
189 | "c:e:o:C:N:a:", // "m:j:", |
190 | &content_type, NULL, &opt_output, &G.opt_charset, NULL, &opt_headers //, NULL, NULL |
191 | ); |
192 | //argc -= optind; |
193 | argv += optind; |
194 | |
195 | // respect -o output |
196 | if (opts & OPT_o) |
197 | freopen(opt_output, "w", stdout); |
198 | |
199 | // no files given on command line? -> use stdin |
200 | if (!*argv) |
201 | *--argv = (char *)"-"; |
202 | |
203 | // put additional headers |
204 | for (l = opt_headers; l; l = l->link) |
205 | puts(l->data); |
206 | |
207 | // make a random string -- it will delimit message parts |
208 | srand(monotonic_us()); |
209 | boundary = xasprintf("%u-%u-%u", |
210 | (unsigned)rand(), (unsigned)rand(), (unsigned)rand()); |
211 | |
212 | // put multipart header |
213 | printf( |
214 | "Mime-Version: 1.0\n" |
215 | "Content-Type: multipart/mixed; boundary=\"%s\"\n" |
216 | , boundary |
217 | ); |
218 | |
219 | // put attachments |
220 | while (*argv) { |
221 | printf( |
222 | "\n--%s\n" |
223 | "Content-Type: %s; charset=%s\n" |
224 | "Content-Disposition: inline; filename=\"%s\"\n" |
225 | "Content-Transfer-Encoding: base64\n" |
226 | , boundary |
227 | , content_type |
228 | , G.opt_charset |
229 | , bb_get_last_path_component_strip(*argv) |
230 | ); |
231 | encode_base64(*argv++, (const char *)stdin, ""); |
232 | } |
233 | |
234 | // put multipart footer |
235 | printf("\n--%s--\n" "\n", boundary); |
236 | |
237 | return EXIT_SUCCESS; |
238 | #undef boundary |
239 | } |
240 |