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/* vi: set sw=4 ts=4: */
/*
* makemime: create MIME-encoded message
*
* Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
//config:config MAKEMIME
//config: bool "makemime (5.4 kb)"
//config: default y
//config: help
//config: Create MIME-formatted messages.
//applet:IF_MAKEMIME(APPLET(makemime, BB_DIR_BIN, BB_SUID_DROP))
//kbuild:lib-$(CONFIG_MAKEMIME) += makemime.o mail.o
#include "libbb.h"
#include "mail.h"
#if 0
# define dbg_error_msg(...) bb_error_msg(__VA_ARGS__)
#else
# define dbg_error_msg(...) ((void)0)
#endif
/*
makemime -c type [-o file] [-e encoding] [-C charset] [-N name] \
[-a "Header: Contents"] file
-m [ type ] [-o file] [-e encoding] [-a "Header: Contents"] file
-j [-o file] file1 file2
@file
file: filename - read or write from filename
- - read or write from stdin or stdout
&n - read or write from file descriptor n
\( opts \) - read from child process, that generates [ opts ]
Options:
-c type - create a new MIME section from "file" with this
Content-Type: (default is application/octet-stream).
-C charset - MIME charset of a new text/plain section.
-N name - MIME content name of the new mime section.
-m [ type ] - create a multipart mime section from "file" of this
Content-Type: (default is multipart/mixed).
-e encoding - use the given encoding (7bit, 8bit, quoted-printable,
or base64), instead of guessing. Omit "-e" and use
-c auto to set Content-Type: to text/plain or
application/octet-stream based on picked encoding.
-j file1 file2 - join mime section file2 to multipart section file1.
-o file - write the result to file, instead of stdout (not
allowed in child processes).
-a header - prepend an additional header to the output.
@file - read all of the above options from file, one option or
value on each line.
{which version of makemime is this? What do we support?}
*/
/* man makemime:
* -c TYPE: create a (non-multipart) MIME section with Content-Type: TYPE
* makemime -c TYPE [-e ENCODING] [-o OUTFILE] [-C CHARSET] [-N NAME] [-a HEADER...] FILE
* The -C option sets the MIME charset attribute for text/plain content.
* The -N option sets the name attribute for Content-Type:
* Encoding must be one of the following: 7bit, 8bit, quoted-printable, or base64.
* -m multipart/TYPE: create a multipart MIME collection with Content-Type: multipart/TYPE
* makemime -m multipart/TYPE [-e ENCODING] [-o OUTFILE] [-a HEADER...] FILE
* Type must be either "multipart/mixed", "multipart/alternative", or some other MIME multipart content type.
* Additionally, encoding can only be "7bit" or "8bit", and will default to "8bit" if not specified.
* Finally, filename must be a MIME-formatted section, NOT a regular file.
* The -m option creates an initial multipart MIME collection, that contains only one MIME section, taken from filename.
* The collection is written to standard output, or the pipe or to outputfile.
* -j FILE1: add a section to a multipart MIME collection
* makemime -j FILE1 [-o OUTFILE] FILE2
* FILE1 must be a MIME collection that was previously created by the -m option.
* FILE2 must be a MIME section that was previously created by the -c option.
* The -j options adds the MIME section in FILE2 to the MIME collection in FILE1.
*/
/* In busybox 1.15.0.svn, makemime generates output like this
* (empty lines are shown exactly!):
{headers added with -a HDR}
Mime-Version: 1.0
Content-Type: multipart/mixed; boundary="24269534-2145583448-1655890676"
--24269534-2145583448-1655890676
Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii}
Content-Disposition: inline; filename="A"
Content-Transfer-Encoding: base64
...file A contents...
--24269534-2145583448-1655890676
Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii}
Content-Disposition: inline; filename="B"
Content-Transfer-Encoding: base64
...file B contents...
--24269534-2145583448-1655890676--
*
* For reference: here is an example email to LKML which has
* 1st unnamed part (so it serves as an email body)
* and one attached file:
...other headers...
Content-Type: multipart/mixed; boundary="=-tOfTf3byOS0vZgxEWcX+"
...other headers...
Mime-Version: 1.0
...other headers...
--=-tOfTf3byOS0vZgxEWcX+
Content-Type: text/plain
Content-Transfer-Encoding: 7bit
...email text...
...email text...
--=-tOfTf3byOS0vZgxEWcX+
Content-Disposition: attachment; filename="xyz"
Content-Type: text/plain; name="xyz"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
...file contents...
...file contents...
--=-tOfTf3byOS0vZgxEWcX+--
...random junk added by mailing list robots and such...
*/
//usage:#define makemime_trivial_usage
//usage: "[OPTIONS] [FILE]..."
//usage:#define makemime_full_usage "\n\n"
//usage: "Create multipart MIME-encoded message from FILEs\n"
/* //usage: "Transfer encoding is base64, disposition is inline (not attachment)\n" */
//usage: "\n -o FILE Output. Default: stdout"
//usage: "\n -a HDR Add header(s). Examples:"
//usage: "\n \"From: user@host.org\", \"Date: `date -R`\""
//usage: "\n -c CT Content type. Default: application/octet-stream"
//usage: "\n -C CS Charset. Default: " CONFIG_FEATURE_MIME_CHARSET
/* //usage: "\n -e ENC Transfer encoding. Ignored. base64 is assumed" */
//usage: "\n"
//usage: "\nOther options are silently ignored"
/*
* -c [Content-Type] should create just one MIME section
* with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR".
* NB: without "Content-Disposition:" auto-added, unlike we do now
* NB2: -c has *optional* param which nevertheless _can_ be specified after a space :(
*
* -m [multipart/mixed] should create multipart MIME section
* with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR",
* and add FILE to it _verbatim_:
* HEADERS
*
* --=_1_1321709112_1605
* FILE_CONTENTS
* --=_1_1321709112_1605
* without any encoding of FILE_CONTENTS. (Basically, it expects that FILE
* is the result of "makemime -c").
*
* -j MULTIPART_FILE1 SINGLE_FILE2 should output MULTIPART_FILE1 + SINGLE_FILE2
*
* Our current behavior is a mutant "-m + -c + -j" one: we create multipart MIME
* and we put "-c" encoded FILEs into many multipart sections.
*/
int makemime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int makemime_main(int argc UNUSED_PARAM, char **argv)
{
unsigned opts;
llist_t *opt_headers = NULL, *l;
const char *opt_output;
const char *content_type = "application/octet-stream";
#define boundary opt_output
enum {
OPT_c = 1 << 0, // create (non-multipart) section
OPT_e = 1 << 1, // Content-Transfer-Encoding. Ignored. Assumed base64
OPT_o = 1 << 2, // output to
OPT_C = 1 << 3, // charset
OPT_N = 1 << 4, // COMPAT
OPT_a = 1 << 5, // additional headers
//OPT_m = 1 << 6, // create mutipart section
//OPT_j = 1 << 7, // join section to multipart section
};
INIT_G();
// parse options
opts = getopt32(argv,
"c:e:o:C:N:a:*", // "m:j:",
&content_type, NULL, &opt_output, &G.opt_charset, NULL, &opt_headers //, NULL, NULL
);
//argc -= optind;
argv += optind;
// respect -o output
if (opts & OPT_o)
freopen(opt_output, "w", stdout);
// no files given on command line? -> use stdin
if (!*argv)
*--argv = (char *)"-";
// put additional headers
for (l = opt_headers; l; l = l->link)
puts(l->data);
// make a random string -- it will delimit message parts
srand(monotonic_us());
boundary = xasprintf("%u-%u-%u",
(unsigned)rand(), (unsigned)rand(), (unsigned)rand());
// put multipart header
printf(
"Mime-Version: 1.0\n"
"Content-Type: multipart/mixed; boundary=\"%s\"\n"
, boundary
);
// put attachments
while (*argv) {
printf(
"\n--%s\n"
"Content-Type: %s; charset=%s\n"
"Content-Disposition: inline; filename=\"%s\"\n"
"Content-Transfer-Encoding: base64\n"
, boundary
, content_type
, G.opt_charset
, bb_get_last_path_component_strip(*argv)
);
printfile_base64(*argv++);
}
// put multipart footer
printf("\n--%s--\n" "\n", boundary);
return EXIT_SUCCESS;
#undef boundary
}
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