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240 lines
8.2 KiB
C
240 lines
8.2 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* makemime: create MIME-encoded message
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*
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* Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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//kbuild:lib-$(CONFIG_MAKEMIME) += makemime.o mail.o
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#include "libbb.h"
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#include "mail.h"
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#if 0
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# define dbg_error_msg(...) bb_error_msg(__VA_ARGS__)
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#else
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# define dbg_error_msg(...) ((void)0)
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#endif
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/*
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makemime -c type [-o file] [-e encoding] [-C charset] [-N name] \
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[-a "Header: Contents"] file
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-m [ type ] [-o file] [-e encoding] [-a "Header: Contents"] file
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-j [-o file] file1 file2
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@file
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file: filename - read or write from filename
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- - read or write from stdin or stdout
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&n - read or write from file descriptor n
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\( opts \) - read from child process, that generates [ opts ]
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Options:
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-c type - create a new MIME section from "file" with this
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Content-Type: (default is application/octet-stream).
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-C charset - MIME charset of a new text/plain section.
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-N name - MIME content name of the new mime section.
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-m [ type ] - create a multipart mime section from "file" of this
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Content-Type: (default is multipart/mixed).
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-e encoding - use the given encoding (7bit, 8bit, quoted-printable,
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or base64), instead of guessing. Omit "-e" and use
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-c auto to set Content-Type: to text/plain or
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application/octet-stream based on picked encoding.
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-j file1 file2 - join mime section file2 to multipart section file1.
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-o file - write the result to file, instead of stdout (not
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allowed in child processes).
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-a header - prepend an additional header to the output.
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@file - read all of the above options from file, one option or
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value on each line.
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{which version of makemime is this? What do we support?}
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*/
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/* man makemime:
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* -c TYPE: create a (non-multipart) MIME section with Content-Type: TYPE
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* makemime -c TYPE [-e ENCODING] [-o OUTFILE] [-C CHARSET] [-N NAME] [-a HEADER...] FILE
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* The -C option sets the MIME charset attribute for text/plain content.
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* The -N option sets the name attribute for Content-Type:
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* Encoding must be one of the following: 7bit, 8bit, quoted-printable, or base64.
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* -m multipart/TYPE: create a multipart MIME collection with Content-Type: multipart/TYPE
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* makemime -m multipart/TYPE [-e ENCODING] [-o OUTFILE] [-a HEADER...] FILE
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* Type must be either "multipart/mixed", "multipart/alternative", or some other MIME multipart content type.
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* Additionally, encoding can only be "7bit" or "8bit", and will default to "8bit" if not specified.
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* Finally, filename must be a MIME-formatted section, NOT a regular file.
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* The -m option creates an initial multipart MIME collection, that contains only one MIME section, taken from filename.
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* The collection is written to standard output, or the pipe or to outputfile.
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* -j FILE1: add a section to a multipart MIME collection
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* makemime -j FILE1 [-o OUTFILE] FILE2
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* FILE1 must be a MIME collection that was previously created by the -m option.
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* FILE2 must be a MIME section that was previously created by the -c option.
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* The -j options adds the MIME section in FILE2 to the MIME collection in FILE1.
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*/
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/* In busybox 1.15.0.svn, makemime generates output like this
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* (empty lines are shown exactly!):
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{headers added with -a HDR}
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Mime-Version: 1.0
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Content-Type: multipart/mixed; boundary="24269534-2145583448-1655890676"
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--24269534-2145583448-1655890676
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Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii}
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Content-Disposition: inline; filename="A"
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Content-Transfer-Encoding: base64
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...file A contents...
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--24269534-2145583448-1655890676
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Content-Type: {set by -c, e.g. text/plain}; charset={set by -C, e.g. us-ascii}
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Content-Disposition: inline; filename="B"
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Content-Transfer-Encoding: base64
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...file B contents...
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--24269534-2145583448-1655890676--
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*
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* For reference: here is an example email to LKML which has
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* 1st unnamed part (so it serves as an email body)
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* and one attached file:
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...other headers...
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Content-Type: multipart/mixed; boundary="=-tOfTf3byOS0vZgxEWcX+"
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...other headers...
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Mime-Version: 1.0
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...other headers...
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--=-tOfTf3byOS0vZgxEWcX+
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Content-Type: text/plain
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Content-Transfer-Encoding: 7bit
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...email text...
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...email text...
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--=-tOfTf3byOS0vZgxEWcX+
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Content-Disposition: attachment; filename="xyz"
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Content-Type: text/plain; name="xyz"; charset="UTF-8"
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Content-Transfer-Encoding: 7bit
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...file contents...
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...file contents...
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--=-tOfTf3byOS0vZgxEWcX+--
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...random junk added by mailing list robots and such...
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*/
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//usage:#define makemime_trivial_usage
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//usage: "[OPTIONS] [FILE]..."
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//usage:#define makemime_full_usage "\n\n"
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//usage: "Create multipart MIME-encoded message from FILEs\n"
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/* //usage: "Transfer encoding is base64, disposition is inline (not attachment)\n" */
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//usage: "\n -o FILE Output. Default: stdout"
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//usage: "\n -a HDR Add header(s). Examples:"
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//usage: "\n \"From: user@host.org\", \"Date: `date -R`\""
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//usage: "\n -c CT Content type. Default: application/octet-stream"
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//usage: "\n -C CS Charset. Default: " CONFIG_FEATURE_MIME_CHARSET
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/* //usage: "\n -e ENC Transfer encoding. Ignored. base64 is assumed" */
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//usage: "\n"
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//usage: "\nOther options are silently ignored"
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/*
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* -c [Content-Type] should create just one MIME section
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* with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR".
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* NB: without "Content-Disposition:" auto-added, unlike we do now
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* NB2: -c has *optional* param which nevertheless _can_ be specified after a space :(
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*
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* -m [multipart/mixed] should create multipart MIME section
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* with "Content-Type:", "Content-Transfer-Encoding:", and HDRs from "-a HDR",
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* and add FILE to it _verbatim_:
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* HEADERS
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*
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* --=_1_1321709112_1605
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* FILE_CONTENTS
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* --=_1_1321709112_1605
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* without any encoding of FILE_CONTENTS. (Basically, it expects that FILE
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* is the result of "makemime -c").
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*
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* -j MULTIPART_FILE1 SINGLE_FILE2 should output MULTIPART_FILE1 + SINGLE_FILE2
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*
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* Our current behavior is a mutant "-m + -c + -j" one: we create multipart MIME
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* and we put "-c" encoded FILEs into many multipart sections.
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*/
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int makemime_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int makemime_main(int argc UNUSED_PARAM, char **argv)
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{
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llist_t *opt_headers = NULL, *l;
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const char *opt_output;
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const char *content_type = "application/octet-stream";
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#define boundary opt_output
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enum {
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OPT_c = 1 << 0, // create (non-multipart) section
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OPT_e = 1 << 1, // Content-Transfer-Encoding. Ignored. Assumed base64
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OPT_o = 1 << 2, // output to
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OPT_C = 1 << 3, // charset
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OPT_N = 1 << 4, // COMPAT
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OPT_a = 1 << 5, // additional headers
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//OPT_m = 1 << 6, // create mutipart section
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//OPT_j = 1 << 7, // join section to multipart section
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};
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INIT_G();
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// parse options
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opt_complementary = "a::";
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opts = getopt32(argv,
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"c:e:o:C:N:a:", // "m:j:",
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&content_type, NULL, &opt_output, &G.opt_charset, NULL, &opt_headers //, NULL, NULL
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);
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//argc -= optind;
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argv += optind;
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// respect -o output
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if (opts & OPT_o)
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freopen(opt_output, "w", stdout);
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// no files given on command line? -> use stdin
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if (!*argv)
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*--argv = (char *)"-";
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// put additional headers
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for (l = opt_headers; l; l = l->link)
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puts(l->data);
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// make a random string -- it will delimit message parts
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srand(monotonic_us());
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boundary = xasprintf("%u-%u-%u",
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(unsigned)rand(), (unsigned)rand(), (unsigned)rand());
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// put multipart header
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printf(
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"Mime-Version: 1.0\n"
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"Content-Type: multipart/mixed; boundary=\"%s\"\n"
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, boundary
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);
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// put attachments
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while (*argv) {
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printf(
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"\n--%s\n"
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"Content-Type: %s; charset=%s\n"
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"Content-Disposition: inline; filename=\"%s\"\n"
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"Content-Transfer-Encoding: base64\n"
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, boundary
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, content_type
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, G.opt_charset
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, bb_get_last_path_component_strip(*argv)
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);
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encode_base64(*argv++, (const char *)stdin, "");
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}
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// put multipart footer
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printf("\n--%s--\n" "\n", boundary);
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return EXIT_SUCCESS;
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#undef boundary
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}
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