1 /* vi: set sw=4 ts=4: */
3 * makemime: create MIME-encoded message
5 * Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
7 * Licensed under GPLv2, see file LICENSE in this source tree.
9 //config:config MAKEMIME
10 //config: bool "makemime"
13 //config: Create MIME-formatted messages.
15 //applet:IF_MAKEMIME(APPLET(makemime, BB_DIR_BIN, BB_SUID_DROP))
17 //kbuild:lib-$(CONFIG_MAKEMIME) += makemime.o mail.o
23 # define dbg_error_msg(...) bb_error_msg(__VA_ARGS__)
25 # define dbg_error_msg(...) ((void)0)
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
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 ]
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.
56 @file - read all of the above options from file, one option or
58 {which version of makemime is this? What do we support?}
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.
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.
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.
84 /* In busybox 1.15.0.svn, makemime generates output like this
85 * (empty lines are shown exactly!):
86 {headers added with -a HDR}
88 Content-Type: multipart/mixed; boundary="24269534-2145583448-1655890676"
90 --24269534-2145583448-1655890676
91 Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii}
92 Content-Disposition: inline; filename="A"
93 Content-Transfer-Encoding: base64
96 --24269534-2145583448-1655890676
97 Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii}
98 Content-Disposition: inline; filename="B"
99 Content-Transfer-Encoding: base64
101 ...file B contents...
102 --24269534-2145583448-1655890676--
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:
109 Content-Type: multipart/mixed; boundary="=-tOfTf3byOS0vZgxEWcX+"
115 --=-tOfTf3byOS0vZgxEWcX+
116 Content-Type: text/plain
117 Content-Transfer-Encoding: 7bit
123 --=-tOfTf3byOS0vZgxEWcX+
124 Content-Disposition: attachment; filename="xyz"
125 Content-Type: text/plain; name="xyz"; charset="UTF-8"
126 Content-Transfer-Encoding: 7bit
131 --=-tOfTf3byOS0vZgxEWcX+--
133 ...random junk added by mailing list robots and such...
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" */
141 //usage: "\n -o FILE Output. Default: stdout"
142 //usage: "\n -a HDR Add header(s). Examples:"
143 //usage: "\n \"From: user@host.org\", \"Date: `date -R`\""
144 //usage: "\n -c CT Content type. Default: application/octet-stream"
145 //usage: "\n -C CS Charset. Default: " CONFIG_FEATURE_MIME_CHARSET
146 /* //usage: "\n -e ENC Transfer encoding. Ignored. base64 is assumed" */
148 //usage: "\nOther options are silently ignored"
151 * -c [Content-Type] should create just one MIME section
152 * with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR".
153 * NB: without "Content-Disposition:" auto-added, unlike we do now
154 * NB2: -c has *optional* param which nevertheless _can_ be specified after a space :(
156 * -m [multipart/mixed] should create multipart MIME section
157 * with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR",
158 * and add FILE to it _verbatim_:
161 * --=_1_1321709112_1605
163 * --=_1_1321709112_1605
164 * without any encoding of FILE_CONTENTS. (Basically, it expects that FILE
165 * is the result of "makemime -c").
167 * -j MULTIPART_FILE1 SINGLE_FILE2 should output MULTIPART_FILE1 + SINGLE_FILE2
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.
173 int makemime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
174 int makemime_main(int argc UNUSED_PARAM, char **argv)
176 llist_t *opt_headers = NULL, *l;
177 const char *opt_output;
178 const char *content_type = "application/octet-stream";
179 #define boundary opt_output
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
194 opts = getopt32(argv,
195 "c:e:o:C:N:a:*", // "m:j:",
196 &content_type, NULL, &opt_output, &G.opt_charset, NULL, &opt_headers //, NULL, NULL
203 freopen(opt_output, "w", stdout);
205 // no files given on command line? -> use stdin
207 *--argv = (char *)"-";
209 // put additional headers
210 for (l = opt_headers; l; l = l->link)
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());
218 // put multipart header
220 "Mime-Version: 1.0\n"
221 "Content-Type: multipart/mixed; boundary=\"%s\"\n"
229 "Content-Type: %s; charset=%s\n"
230 "Content-Disposition: inline; filename=\"%s\"\n"
231 "Content-Transfer-Encoding: base64\n"
235 , bb_get_last_path_component_strip(*argv)
237 encode_base64(*argv++, (const char *)stdin, "");
240 // put multipart footer
241 printf("\n--%s--\n" "\n", boundary);