/* vi: set sw=4 ts=4: */ /* * makemime: create MIME-encoded message * * Copyright (C) 2008 by Vladimir Dronnikov * * 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 }