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Denys Vlasenkod616ab62011-05-22 03:46:33 +02001/* vi: set sw=4 ts=4: */
2/*
3 * makemime: create MIME-encoded message
Denys Vlasenkod616ab62011-05-22 03:46:33 +02004 *
5 * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
6 *
7 * Licensed under GPLv2, see file LICENSE in this source tree.
8 */
Denys Vlasenkoc19f7582016-11-23 09:58:03 +01009//config:config MAKEMIME
Denys Vlasenko4eed2c62017-07-18 22:01:24 +020010//config: bool "makemime (5.9 kb)"
Denys Vlasenkoc19f7582016-11-23 09:58:03 +010011//config: default y
12//config: help
Denys Vlasenko72089cf2017-07-21 09:50:55 +020013//config: Create MIME-formatted messages.
Denys Vlasenkoc19f7582016-11-23 09:58:03 +010014
15//applet:IF_MAKEMIME(APPLET(makemime, BB_DIR_BIN, BB_SUID_DROP))
Denys Vlasenkod616ab62011-05-22 03:46:33 +020016
17//kbuild:lib-$(CONFIG_MAKEMIME) += makemime.o mail.o
18
19#include "libbb.h"
20#include "mail.h"
21
22#if 0
23# define dbg_error_msg(...) bb_error_msg(__VA_ARGS__)
24#else
25# define dbg_error_msg(...) ((void)0)
26#endif
27
28/*
29 makemime -c type [-o file] [-e encoding] [-C charset] [-N name] \
30 [-a "Header: Contents"] file
31 -m [ type ] [-o file] [-e encoding] [-a "Header: Contents"] file
32 -j [-o file] file1 file2
33 @file
34
35 file: filename - read or write from filename
36 - - read or write from stdin or stdout
37 &n - read or write from file descriptor n
38 \( opts \) - read from child process, that generates [ opts ]
39
40Options:
41 -c type - create a new MIME section from "file" with this
42 Content-Type: (default is application/octet-stream).
43 -C charset - MIME charset of a new text/plain section.
44 -N name - MIME content name of the new mime section.
45 -m [ type ] - create a multipart mime section from "file" of this
46 Content-Type: (default is multipart/mixed).
47 -e encoding - use the given encoding (7bit, 8bit, quoted-printable,
48 or base64), instead of guessing. Omit "-e" and use
49 -c auto to set Content-Type: to text/plain or
50 application/octet-stream based on picked encoding.
51 -j file1 file2 - join mime section file2 to multipart section file1.
52 -o file - write the result to file, instead of stdout (not
53 allowed in child processes).
54 -a header - prepend an additional header to the output.
55
56 @file - read all of the above options from file, one option or
57 value on each line.
58 {which version of makemime is this? What do we support?}
59*/
60/* man makemime:
61
62 * -c TYPE: create a (non-multipart) MIME section with Content-Type: TYPE
63 * makemime -c TYPE [-e ENCODING] [-o OUTFILE] [-C CHARSET] [-N NAME] [-a HEADER...] FILE
64 * The -C option sets the MIME charset attribute for text/plain content.
65 * The -N option sets the name attribute for Content-Type:
66 * Encoding must be one of the following: 7bit, 8bit, quoted-printable, or base64.
67
68 * -m multipart/TYPE: create a multipart MIME collection with Content-Type: multipart/TYPE
69 * makemime -m multipart/TYPE [-e ENCODING] [-o OUTFILE] [-a HEADER...] FILE
70 * Type must be either "multipart/mixed", "multipart/alternative", or some other MIME multipart content type.
71 * Additionally, encoding can only be "7bit" or "8bit", and will default to "8bit" if not specified.
72 * Finally, filename must be a MIME-formatted section, NOT a regular file.
73 * The -m option creates an initial multipart MIME collection, that contains only one MIME section, taken from filename.
74 * The collection is written to standard output, or the pipe or to outputfile.
75
76 * -j FILE1: add a section to a multipart MIME collection
77 * makemime -j FILE1 [-o OUTFILE] FILE2
78 * FILE1 must be a MIME collection that was previously created by the -m option.
79 * FILE2 must be a MIME section that was previously created by the -c option.
80 * The -j options adds the MIME section in FILE2 to the MIME collection in FILE1.
81 */
82
83
84/* In busybox 1.15.0.svn, makemime generates output like this
85 * (empty lines are shown exactly!):
86{headers added with -a HDR}
87Mime-Version: 1.0
88Content-Type: multipart/mixed; boundary="24269534-2145583448-1655890676"
89
90--24269534-2145583448-1655890676
91Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii}
92Content-Disposition: inline; filename="A"
93Content-Transfer-Encoding: base64
94
95...file A contents...
96--24269534-2145583448-1655890676
97Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii}
98Content-Disposition: inline; filename="B"
99Content-Transfer-Encoding: base64
100
101...file B contents...
102--24269534-2145583448-1655890676--
103
104 *
105 * For reference: here is an example email to LKML which has
106 * 1st unnamed part (so it serves as an email body)
107 * and one attached file:
108...other headers...
109Content-Type: multipart/mixed; boundary="=-tOfTf3byOS0vZgxEWcX+"
110...other headers...
111Mime-Version: 1.0
112...other headers...
113
114
115--=-tOfTf3byOS0vZgxEWcX+
116Content-Type: text/plain
117Content-Transfer-Encoding: 7bit
118
119...email text...
120...email text...
121
122
123--=-tOfTf3byOS0vZgxEWcX+
124Content-Disposition: attachment; filename="xyz"
125Content-Type: text/plain; name="xyz"; charset="UTF-8"
126Content-Transfer-Encoding: 7bit
127
128...file contents...
129...file contents...
130
131--=-tOfTf3byOS0vZgxEWcX+--
132
133...random junk added by mailing list robots and such...
134*/
135
136//usage:#define makemime_trivial_usage
137//usage: "[OPTIONS] [FILE]..."
138//usage:#define makemime_full_usage "\n\n"
139//usage: "Create multipart MIME-encoded message from FILEs\n"
140/* //usage: "Transfer encoding is base64, disposition is inline (not attachment)\n" */
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200141//usage: "\n -o FILE Output. Default: stdout"
Denys Vlasenko3365e9f2011-12-20 02:15:19 +0100142//usage: "\n -a HDR Add header(s). Examples:"
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200143//usage: "\n \"From: user@host.org\", \"Date: `date -R`\""
Denys Vlasenkofc186712011-11-19 14:43:02 +0100144//usage: "\n -c CT Content type. Default: application/octet-stream"
Denys Vlasenko66426762011-06-05 03:58:28 +0200145//usage: "\n -C CS Charset. Default: " CONFIG_FEATURE_MIME_CHARSET
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200146/* //usage: "\n -e ENC Transfer encoding. Ignored. base64 is assumed" */
147//usage: "\n"
148//usage: "\nOther options are silently ignored"
149
Denys Vlasenkofc186712011-11-19 14:43:02 +0100150/*
151 * -c [Content-Type] should create just one MIME section
Denys Vlasenko3365e9f2011-12-20 02:15:19 +0100152 * with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR".
Denys Vlasenkofc186712011-11-19 14:43:02 +0100153 * NB: without "Content-Disposition:" auto-added, unlike we do now
154 * NB2: -c has *optional* param which nevertheless _can_ be specified after a space :(
155 *
156 * -m [multipart/mixed] should create multipart MIME section
Denys Vlasenko3365e9f2011-12-20 02:15:19 +0100157 * with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR",
Denys Vlasenkofc186712011-11-19 14:43:02 +0100158 * and add FILE to it _verbatim_:
159 * HEADERS
160 *
161 * --=_1_1321709112_1605
162 * FILE_CONTENTS
163 * --=_1_1321709112_1605
164 * without any encoding of FILE_CONTENTS. (Basically, it expects that FILE
165 * is the result of "makemime -c").
166 *
167 * -j MULTIPART_FILE1 SINGLE_FILE2 should output MULTIPART_FILE1 + SINGLE_FILE2
168 *
169 * Our current behavior is a mutant "-m + -c + -j" one: we create multipart MIME
170 * and we put "-c" encoded FILEs into many multipart sections.
171 */
172
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200173int makemime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
174int makemime_main(int argc UNUSED_PARAM, char **argv)
175{
176 llist_t *opt_headers = NULL, *l;
177 const char *opt_output;
Denys Vlasenko3bc4fc52011-11-19 13:55:46 +0100178 const char *content_type = "application/octet-stream";
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200179#define boundary opt_output
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200180 enum {
181 OPT_c = 1 << 0, // create (non-multipart) section
182 OPT_e = 1 << 1, // Content-Transfer-Encoding. Ignored. Assumed base64
183 OPT_o = 1 << 2, // output to
184 OPT_C = 1 << 3, // charset
185 OPT_N = 1 << 4, // COMPAT
186 OPT_a = 1 << 5, // additional headers
187 //OPT_m = 1 << 6, // create mutipart section
188 //OPT_j = 1 << 7, // join section to multipart section
189 };
190
191 INIT_G();
192
193 // parse options
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200194 opts = getopt32(argv,
Denys Vlasenko237bedd2016-07-06 21:58:02 +0200195 "c:e:o:C:N:a:*", // "m:j:",
Denys Vlasenko3bc4fc52011-11-19 13:55:46 +0100196 &content_type, NULL, &opt_output, &G.opt_charset, NULL, &opt_headers //, NULL, NULL
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200197 );
198 //argc -= optind;
199 argv += optind;
200
201 // respect -o output
202 if (opts & OPT_o)
203 freopen(opt_output, "w", stdout);
204
205 // no files given on command line? -> use stdin
206 if (!*argv)
207 *--argv = (char *)"-";
208
209 // put additional headers
210 for (l = opt_headers; l; l = l->link)
211 puts(l->data);
212
213 // make a random string -- it will delimit message parts
214 srand(monotonic_us());
215 boundary = xasprintf("%u-%u-%u",
216 (unsigned)rand(), (unsigned)rand(), (unsigned)rand());
217
218 // put multipart header
219 printf(
220 "Mime-Version: 1.0\n"
221 "Content-Type: multipart/mixed; boundary=\"%s\"\n"
222 , boundary
223 );
224
225 // put attachments
226 while (*argv) {
227 printf(
228 "\n--%s\n"
229 "Content-Type: %s; charset=%s\n"
230 "Content-Disposition: inline; filename=\"%s\"\n"
231 "Content-Transfer-Encoding: base64\n"
232 , boundary
Denys Vlasenko3bc4fc52011-11-19 13:55:46 +0100233 , content_type
Denys Vlasenkod616ab62011-05-22 03:46:33 +0200234 , G.opt_charset
235 , bb_get_last_path_component_strip(*argv)
236 );
237 encode_base64(*argv++, (const char *)stdin, "");
238 }
239
240 // put multipart footer
241 printf("\n--%s--\n" "\n", boundary);
242
243 return EXIT_SUCCESS;
244#undef boundary
245}