2 ** mhbuild.c -- expand/translate MIME composition files
4 ** This code is Copyright (c) 2002, by the authors of nmh. See the
5 ** COPYRIGHT file in the root directory of the nmh distribution for
6 ** complete copyright information.
10 ** This code was originally part of mhn.c. I split it into
11 ** a separate program (mhbuild.c). But the code still has some of
12 ** the mhn.c code in it. This program needs additional
13 ** streamlining and removal of unneeded code.
21 #include <h/mhparse.h>
29 #ifdef HAVE_SYS_TIME_H
30 # include <sys/time.h>
34 static struct swit switches[] = {
50 ** Directory to place tmp files. This must
51 ** be set before these routines are called.
57 static char prefix[] = "----- =_aaaaaaaaaa";
65 int make_intermediates(char *);
66 void content_error(char *, CT, char *, ...);
69 void free_content(CT);
71 void free_encoding(CT, int);
76 static int init_decoded_content(CT);
77 static char *fgetstr(char *, int, FILE *);
78 static int user_content(FILE *, char *, char *, CT *);
79 static void set_id(CT, int);
80 static int compose_content(CT);
81 static int scan_content(CT);
82 static int build_headers(CT);
83 static CT build_mime(char *);
92 static char infile[BUFSIZ];
93 static int unlink_infile = 0;
95 static char outfile[BUFSIZ];
96 static int unlink_outfile = 0;
101 int output_message(CT, char *);
102 int output_message_fp(CT, FILE *, char*);
105 void set_endian(void);
108 void free_content(CT);
112 main(int argc, char **argv)
114 char *cp, buf[BUFSIZ];
115 char buffer[BUFSIZ], *compfile = NULL;
116 char **argp, **arguments;
121 if (atexit(unlink_done) != 0) {
122 adios(EX_OSERR, NULL, "atexit failed");
125 setlocale(LC_ALL, "");
126 invo_name = mhbasename(argv[0]);
128 /* read user profile/context */
131 arguments = getarguments(invo_name, argc, argv, 1);
134 while ((cp = *argp++)) {
135 if (cp[0] == '-' && cp[1] == '\0') {
137 adios(EX_USAGE, NULL, "cannot specify both standard input and a file");
140 verbosw = 0; /* turn off -verbose listings */
144 switch (smatch(++cp, switches)) {
146 ambigsw(cp, switches);
149 adios(EX_USAGE, NULL, "-%s unknown", cp);
152 snprintf(buf, sizeof(buf), "%s [switches] file", invo_name);
153 print_help(buf, switches, 1);
154 exit(argc == 2 ? EX_OK : EX_USAGE);
156 print_version(invo_name);
157 exit(argc == 2 ? EX_OK : EX_USAGE);
171 adios(EX_USAGE, NULL, "only one composition file allowed");
179 ** Check if we've specified an additional profile
181 if ((cp = getenv("MHBUILD"))) {
182 if ((fp = fopen(cp, "r"))) {
183 readconfig((struct node **) 0, fp, cp, 0);
186 admonish("", "unable to read $MHBUILD profile (%s)",
192 ** Read the standard profile setup
194 if ((fp = fopen(cp = etcpath("mhn.defaults"), "r"))) {
195 readconfig((struct node **) 0, fp, cp, 0);
200 ** Check for storage directory. If defined, we
201 ** will store temporary files there. Else we
202 ** store them in standard nmh directory.
204 if ((cp = context_find(nmhstorage)) && *cp)
205 tmp = concat(cp, "/", invo_name, NULL);
207 tmp = getcpy(toabsdir(invo_name));
209 /* Check if we have a file to process */
211 adios(EX_USAGE, NULL, "need to specify a %s composition file",
215 ** Process the composition file from standard input.
217 if (compfile[0] == '-' && compfile[1] == '\0') {
218 /* copy standard input to temporary file */
219 strncpy(infile, m_mktemp(invo_name, NULL, &fp),
221 while (fgets(buffer, BUFSIZ, stdin))
226 /* build the content structures for MIME message */
227 ct = build_mime(infile);
229 /* output MIME message to this temporary file */
230 strncpy(outfile, m_mktemp(invo_name, NULL, &fp_out),
234 /* output the message */
235 output_message_fp(ct, fp_out, outfile);
238 /* output the temp file to standard output */
239 if ((fp = fopen(outfile, "r")) == NULL)
240 adios(EX_IOERR, outfile, "unable to open");
241 while (fgets(buffer, BUFSIZ, fp))
242 fputs(buffer, stdout);
256 ** Process the composition file from a file.
259 /* build the content structures for MIME message */
260 ct = build_mime(compfile);
262 /* output MIME message to this temporary file */
263 strncpy(outfile, m_mktemp2(compfile, invo_name, NULL, &fp_out),
267 /* output the message */
268 output_message_fp(ct, fp_out, outfile);
271 /* Rename composition draft */
272 snprintf(buffer, sizeof(buffer), "%s.orig", compfile);
273 if (rename(compfile, buffer) == NOTOK) {
274 adios(EX_IOERR, buffer, "unable to rename draft %s to", compfile);
277 /* Rename output file to take its place */
278 if (rename(outfile, compfile) == NOTOK) {
279 advise(compfile, "unable to rename output %s to", outfile);
280 rename(buffer, compfile);
294 ** Check if we need to remove stray temporary files.
299 if (unlink_outfile) {
305 ** Main routine for translating composition file
306 ** into valid MIME message. It translates the draft
307 ** into a content structure (actually a tree of content
308 ** structures). This message then can be manipulated
309 ** in various ways, including being output via
313 build_mime(char *infile)
316 char buf[BUFSIZ], name[NAMESZ];
325 /* open the composition draft */
326 if ((in = fopen(infile, "r")) == NULL)
327 adios(EX_IOERR, infile, "unable to open for reading");
330 ** Allocate space for primary (outside) content
332 if ((ct = (CT) mh_xcalloc(1, sizeof(*ct))) == NULL)
333 adios(EX_OSERR, NULL, "out of memory");
336 ** Allocate structure for handling decoded content
337 ** for this part. We don't really need this, but
338 ** allocate it to remain consistent.
340 init_decoded_content(ct);
343 ** Parse some of the header fields in the composition
344 ** draft into the linked list of header fields for
345 ** the new MIME message.
347 for (compnum = 1, state = FLD;;) {
348 switch (state = m_getfld(state, name, buf, sizeof(buf), in)) {
354 /* abort if draft has Mime-Version header field */
355 if (!mh_strcasecmp(name, VRSN_FIELD))
356 adios(EX_CONFIG, NULL, "draft shouldn't contain %s: field", VRSN_FIELD);
359 ** abort if draft has Content-Transfer-Encoding
362 if (!mh_strcasecmp(name, ENCODING_FIELD))
363 adios(EX_CONFIG, NULL, "draft shouldn't contain %s: field", ENCODING_FIELD);
365 /* ignore any Content-Type fields in the header */
366 if (!mh_strcasecmp(name, TYPE_FIELD)) {
367 while (state == FLDPLUS)
368 state = m_getfld(state, name, buf,
373 /* get copies of the buffers */
377 /* if necessary, get rest of field */
378 while (state == FLDPLUS) {
379 state = m_getfld(state, name, buf,
381 vp = add(buf, vp); /* add to prev value */
384 /* Now add the header data to the list */
385 add_header(ct, np, vp);
388 /* if this wasn't the last hdr field, then continue */
394 adios(EX_CONFIG, NULL, "draft has empty body -- no directives!");
399 fseek(in, (long) (-strlen(buf)), SEEK_CUR);
404 adios(EX_CONFIG, NULL, "message format error in component #%d",
408 adios(EX_SOFTWARE, NULL, "getfld() returned %d", state);
414 * Iterate through the list of headers and call the function to MIME-ify
419 for (hp = ct->c_first_hf; hp != NULL; hp = hp->next) {
420 if (encode_rfc2047(hp->name, &hp->value, NULL)) {
421 adios(EX_DATAERR, NULL, "Unable to encode header \"%s\"", hp->name);
426 ** Now add the MIME-Version header field
427 ** to the list of header fields.
429 np = getcpy(VRSN_FIELD);
430 vp = concat(" ", VRSN_VALUE, "\n", NULL);
431 add_header(ct, np, vp);
434 ** We initally assume we will find multiple contents in the
435 ** draft. So create a multipart/mixed content to hold everything.
436 ** We can remove this later, if it is not needed.
438 if (get_ctinfo("multipart/mixed", ct, 0) == NOTOK) {
441 ct->c_type = CT_MULTIPART;
442 ct->c_subtype = MULTI_MIXED;
443 ct->c_file = getcpy(infile);
445 if ((m = (struct multipart *) mh_xcalloc(1, sizeof(*m))) == NULL)
446 adios(EX_OSERR, NULL, "out of memory");
447 ct->c_ctparams = (void *) m;
451 ** read and parse the composition file
452 ** and the directives it contains.
454 while (fgetstr(buf, sizeof(buf) - 1, in)) {
458 if (user_content(in, infile, buf, &p) == DONE) {
459 admonish(NULL, "ignoring spurious #end");
465 if ((part = (struct part *) mh_xcalloc(1, sizeof(*part))) == NULL)
466 adios(EX_OSERR, NULL, "out of memory");
473 ** close the composition draft since
474 ** it's not needed any longer.
478 /* check if any contents were found */
480 adios(EX_OSERR, NULL, "no content directives found");
483 ** If only one content was found, then remove and
484 ** free the outer multipart content.
486 if (!m->mp_parts->mp_next) {
489 p = m->mp_parts->mp_part;
490 m->mp_parts->mp_part = NULL;
492 /* move header fields */
493 p->c_first_hf = ct->c_first_hf;
494 p->c_last_hf = ct->c_last_hf;
495 ct->c_first_hf = NULL;
496 ct->c_last_hf = NULL;
505 ** Fill out, or expand directives. Parse and execute
506 ** commands specified by profile composition strings.
510 if ((cp = strchr(prefix, 'a')) == NULL)
511 adios(EX_SOFTWARE, NULL, "internal error(4)");
514 ** Scan the contents. Choose a transfer encoding, and
515 ** check if prefix for multipart boundary clashes with
516 ** any of the contents.
518 while (scan_content(ct) == NOTOK) {
523 adios(EX_SOFTWARE, NULL, "giving up trying to find a unique delimiter string");
529 /* Build the rest of the header field structures */
537 ** Set up structures for placing unencoded
538 ** content when building parts.
542 init_decoded_content(CT ct)
546 if ((ce = (CE) mh_xcalloc(1, sizeof(*ce))) == NULL)
547 adios(EX_OSERR, NULL, "out of memory");
550 ct->c_ceopenfnx = open7Bit; /* since unencoded */
551 ct->c_ceclosefnx = close_encoding;
552 ct->c_cesizefnx = NULL; /* since unencoded */
559 fgetstr(char *s, int n, FILE *stream)
563 for (ep = (cp = s) + n; cp < ep; ) {
566 if (!fgets(cp, n, stream))
567 return (cp != s ? s : NULL);
568 if (cp == s && *cp != '#')
571 cp += (i = strlen(cp)) - 1;
572 if (i <= 1 || *cp-- != '\n' || *cp != '\\')
583 ** Parse the composition draft for text and directives.
584 ** Do initial setup of Content structure.
588 user_content(FILE *in, char *file, char *buf, CT *ctp)
596 struct str2init *s2i;
601 if (buf[0] == '\n' || strcmp(buf, "#\n") == 0) {
606 /* allocate basic Content structure */
607 if ((ct = (CT) mh_xcalloc(1, sizeof(*ct))) == NULL)
608 adios(EX_OSERR, NULL, "out of memory");
611 /* allocate basic structure for handling decoded content */
612 init_decoded_content(ct);
619 ** Handle inline text. Check if line
620 ** is one of the following forms:
622 ** 1) doesn't begin with '#' (implicit directive)
623 ** 2) begins with "##" (implicit directive)
624 ** 3) begins with "#<"
626 if (buf[0] != '#' || buf[1] == '#' || buf[1] == '<') {
630 char content[BUFSIZ];
634 cp = m_mktemp2(NULL, invo_name, NULL, &out);
636 adios(EX_CANTCREAT, "mhbuild", "unable to create temporary file");
638 /* use a temp file to collect the plain text lines */
639 ce->ce_file = getcpy(cp);
642 if (buf[0] == '#' && buf[1] == '<') {
643 strncpy(content, buf + 2, sizeof(content));
650 /* the directive is implicit */
651 strncpy(content, "text/plain", sizeof(content));
653 strncpy(buffer, buf[0] != '#' ? buf : buf + 1, sizeof(buffer));
657 if (headers >= 0 && uprf(buffer, DESCR_FIELD) &&
658 buffer[i=strlen(DESCR_FIELD)] == ':') {
662 ct->c_descr = add(buffer + i + 1, ct->c_descr);
663 if (!fgetstr(buffer, sizeof(buffer) - 1, in))
664 adios(EX_DATAERR, NULL, "end-of-file after %s: field in plaintext", DESCR_FIELD);
672 adios(EX_DATAERR, NULL, "#-directive after %s: field in plaintext", DESCR_FIELD);
680 if (headers >= 0 && uprf(buffer, DISPO_FIELD)
681 && buffer[i = strlen(DISPO_FIELD)] == ':') {
685 ct->c_dispo = add(buffer + i + 1, ct->c_dispo);
686 if (!fgetstr(buffer, sizeof(buffer) - 1, in))
687 adios(EX_DATAERR, NULL, "end-of-file after %s: field in plaintext", DISPO_FIELD);
695 adios(EX_DATAERR, NULL, "#-directive after %s: field in plaintext", DISPO_FIELD);
703 if (headers != 1 || buffer[0] != '\n')
709 if ((cp = fgetstr(buffer, sizeof(buffer) - 1, in))
712 if (buffer[0] == '#') {
715 if (buffer[1] != '#')
717 for (cp = (bp = buffer) + 1; *cp; cp++)
725 /* parse content type */
726 if (get_ctinfo(content, ct, inlineD) == NOTOK)
729 for (s2i = str2cts; s2i->si_key; s2i++)
730 if (!mh_strcasecmp(ci->ci_type, s2i->si_key))
732 if (!s2i->si_key && !uprf(ci->ci_type, "X-"))
736 ** check type specified (possibly implicitly)
738 switch (ct->c_type = s2i->si_val) {
740 if (!mh_strcasecmp(ci->ci_subtype, "rfc822")) {
741 ct->c_encoding = CE_7BIT;
746 adios(EX_DATAERR, NULL, "it doesn't make sense to define an in-line %s content",
747 ct->c_type == CT_MESSAGE ? "message" :
753 if ((ct->c_ctinitfnx = s2i->si_init))
754 (*ct->c_ctinitfnx) (ct);
759 fseek(in, pos, SEEK_SET);
764 ** If we've reached this point, the next line
765 ** must be some type of explicit directive.
769 adios(EX_DATAERR, NULL, "The #@ directive i.e. message/external-body "
770 "is not supported anymore.");
773 /* parse directive */
774 if (get_ctinfo(buf+1, ct, 1) == NOTOK)
777 /* check directive against the list of MIME types */
778 for (s2i = str2cts; s2i->si_key; s2i++)
779 if (!mh_strcasecmp(ci->ci_type, s2i->si_key))
783 ** Check if the directive specified a valid type.
784 ** This will happen if it was one of the following forms:
790 adios(EX_DATAERR, NULL, "missing subtype in \"#%s\"", ci->ci_type);
792 switch (ct->c_type = s2i->si_val) {
794 adios(EX_DATAERR, NULL, "use \"#begin ... #end\" instead of \"#%s/%s\"", ci->ci_type, ci->ci_subtype);
798 if (!mh_strcasecmp(ci->ci_subtype, "partial") ||
799 !mh_strcasecmp(ci->ci_subtype,
801 adios(EX_DATAERR, NULL, "sorry, \"#%s/%s\" isn't supported", ci->ci_type, ci->ci_subtype);
804 admonish(NULL, "use \"#forw [+folder] [msgs]\" instead of \"#%s/%s\"", ci->ci_type, ci->ci_subtype);
808 if ((ct->c_ctinitfnx = s2i->si_init))
809 (*ct->c_ctinitfnx) (ct);
813 /* Handle [file] argument */
815 /* check if specifies command to execute */
816 if (*ci->ci_magic == '|' || *ci->ci_magic == '!') {
817 for (cp = ci->ci_magic + 1; isspace(*cp); cp++)
820 adios(EX_DATAERR, NULL, "empty pipe command for #%s directive", ci->ci_type);
825 /* record filename of decoded contents */
826 ce->ce_file = ci->ci_magic;
827 if (access(ce->ce_file, R_OK) == NOTOK)
828 adios(EX_IOERR, "reading", "unable to access %s for", ce->ce_file);
835 ** No [file] argument, so check profile for
836 ** method to compose content.
838 snprintf(buffer, sizeof(buffer), "%s-compose-%s/%s",
839 invo_name, ci->ci_type, ci->ci_subtype);
840 if ((cp = context_find(buffer)) == NULL || *cp == '\0') {
841 snprintf(buffer, sizeof(buffer), "%s-compose-%s",
842 invo_name, ci->ci_type);
843 if ((cp = context_find(buffer)) == NULL ||
845 content_error(NULL, ct, "don't know how to compose content");
849 ci->ci_magic = getcpy(cp);
855 ** #forw [+folder] [msgs]
857 if (!mh_strcasecmp(ci->ci_type, "forw")) {
859 char *folder, *arguments[MAXARGS];
865 ap = brkstring(ci->ci_magic, " ", "\n");
866 for (i=0; ap[i] && i<MAXARGS-1; i++) {
867 arguments[i] = ap[i];
872 arguments[0] = seq_cur;
877 /* search the arguments for a folder name */
878 for (ap = arguments; *ap; ap++) {
880 if (*cp == '+' || *cp == '@') {
882 adios(EX_USAGE, NULL, "only one folder per #forw directive");
884 folder = getcpy(expandfol(cp));
888 /* else, use the current folder */
890 folder = getcpy(getcurfol());
892 if (!(mp = folder_read(folder)))
893 adios(EX_IOERR, NULL, "unable to read folder %s", folder);
894 for (ap = arguments; *ap; ap++) {
896 if (*cp != '+' && *cp != '@')
897 if (!m_convert(mp, cp))
904 ** If there is more than one message to include, make this
905 ** a content of type "multipart/digest" and insert each message
906 ** as a subpart. If there is only one message, then make this
907 ** a content of type "message/rfc822".
909 if (mp->numsel > 1) {
910 /* we are forwarding multiple messages */
911 if (get_ctinfo("multipart/digest", ct, 0) == NOTOK)
913 ct->c_type = CT_MULTIPART;
914 ct->c_subtype = MULTI_DIGEST;
916 if ((m = (struct multipart *)
917 mh_xcalloc(1, sizeof(*m))) == NULL)
918 adios(EX_OSERR, NULL, "out of memory");
919 ct->c_ctparams = (void *) m;
922 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++) {
923 if (is_selected(mp, msgnum)) {
928 if ((p = (CT) mh_xcalloc(1, sizeof(*p)))
930 adios(EX_OSERR, NULL, "out of memory");
931 init_decoded_content(p);
933 if (get_ctinfo("message/rfc822", p, 0)
936 p->c_type = CT_MESSAGE;
937 p->c_subtype = MESSAGE_RFC822;
939 snprintf(buffer, sizeof(buffer),
940 "%s/%d", mp->foldpath,
942 pe->ce_file = getcpy(buffer);
944 if ((part = (struct part *) mh_xcalloc(1, sizeof(*part))) == NULL)
945 adios(EX_OSERR, NULL, "out of memory");
952 /* we are forwarding one message */
953 if (get_ctinfo("message/rfc822", ct, 0) == NOTOK)
955 ct->c_type = CT_MESSAGE;
956 ct->c_subtype = MESSAGE_RFC822;
959 snprintf(buffer, sizeof(buffer), "%s/%d",
960 mp->foldpath, msgnum);
961 ce->ce_file = getcpy(buffer);
964 folder_free(mp); /* free folder/message structure */
971 if (!mh_strcasecmp(ci->ci_type, "end")) {
978 ** #begin [ alternative | parallel ]
980 if (!mh_strcasecmp(ci->ci_type, "begin")) {
983 cp = SubMultiPart[vrsn - 1].kv_key;
984 } else if (!mh_strcasecmp(ci->ci_magic, "alternative")) {
985 vrsn = MULTI_ALTERNATE;
986 cp = SubMultiPart[vrsn - 1].kv_key;
987 } else if (!mh_strcasecmp(ci->ci_magic, "parallel")) {
988 vrsn = MULTI_PARALLEL;
989 cp = SubMultiPart[vrsn - 1].kv_key;
990 } else if (uprf(ci->ci_magic, "digest")) {
993 vrsn = MULTI_UNKNOWN;
998 snprintf(buffer, sizeof(buffer), "multipart/%s", cp);
999 if (get_ctinfo(buffer, ct, 0) == NOTOK)
1001 ct->c_type = CT_MULTIPART;
1002 ct->c_subtype = vrsn;
1004 if ((m = (struct multipart *) mh_xcalloc(1, sizeof(*m))) == NULL)
1005 adios(EX_OSERR, NULL, "out of memory");
1006 ct->c_ctparams = (void *) m;
1009 while (fgetstr(buffer, sizeof(buffer) - 1, in)) {
1013 if (user_content(in, file, buffer, &p) == DONE) {
1015 adios(EX_DATAERR, NULL, "empty \"#begin ... #end\" sequence");
1021 if ((part = (struct part *)
1022 mh_xcalloc(1, sizeof(*part))) == NULL)
1023 adios(EX_OSERR, NULL, "out of memory");
1025 pp = &part->mp_next;
1028 admonish(NULL, "premature end-of-file, missing #end");
1033 ** Unknown directive
1035 adios(EX_DATAERR, NULL, "unknown directive \"#%s\"", ci->ci_type);
1036 return NOTOK; /* NOT REACHED */
1041 set_id(CT ct, int top)
1045 static time_t clock = 0;
1046 static char *msgfmt;
1050 snprintf(msgid, sizeof(msgid), "<%d.%ld.%%d@%s>\n",
1051 (int) getpid(), (long) clock, LocalName());
1053 msgfmt = getcpy(msgid);
1055 snprintf(msgid, sizeof(msgid), msgfmt, top ? 0 : ++partno);
1056 ct->c_id = getcpy(msgid);
1061 ** Fill out, or expand the various contents in the composition
1062 ** draft. Read-in any necessary files. Parse and execute any
1063 ** commands specified by profile composition strings.
1067 compose_content(CT ct)
1069 CE ce = ct->c_cefile;
1071 switch (ct->c_type) {
1076 char partnam[BUFSIZ];
1077 struct multipart *m = (struct multipart *) ct->c_ctparams;
1081 snprintf(partnam, sizeof(partnam), "%s.",
1083 pp = partnam + strlen(partnam);
1088 /* first, we call compose_content on all the subparts */
1089 for (part = m->mp_parts, partnum = 1; part;
1090 part = part->mp_next, partnum++) {
1091 CT p = part->mp_part;
1093 sprintf(pp, "%d", partnum);
1094 p->c_partno = getcpy(partnam);
1095 if (compose_content(p) == NOTOK)
1102 /* Nothing to do for type message */
1106 ** Discrete types (text/application/audio/image/video)
1111 int xstdout, len, buflen;
1112 char *bp, **ap, *cp;
1113 char *vec[4], buffer[BUFSIZ];
1115 CI ci = &ct->c_ctinfo;
1118 if (!(cp = ci->ci_magic))
1119 adios(EX_SOFTWARE, NULL, "internal error(5)");
1121 tfile = m_mktemp2(NULL, invo_name, NULL, NULL);
1122 if (tfile == NULL) {
1123 adios(EX_CANTCREAT, "mhbuild", "unable to create temporary file");
1125 ce->ce_file = getcpy(tfile);
1130 /* Get buffer ready to go */
1133 buflen = sizeof(buffer);
1136 ** Parse composition string into buffer
1138 for ( ; *cp; cp++) {
1144 ** insert parameters from
1150 for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
1151 snprintf(bp, buflen, "%s%s=\"%s\"", s, *ap, *ep);
1161 /* %f, and stdout is not-redirected */
1167 ** insert temporary filename
1168 ** where content should be
1171 snprintf(bp, buflen, "%s", ce->ce_file);
1175 /* insert content subtype */
1176 strncpy(bp, ci->ci_subtype, buflen);
1180 /* insert character % */
1201 printf("composing content %s/%s from command\n\t%s\n", ci->ci_type, ci->ci_subtype, buffer);
1203 fflush(stdout); /* not sure if need for -noverbose */
1210 if ((out = fopen(ce->ce_file, "w")) == NULL)
1211 adios(EX_IOERR, ce->ce_file, "unable to open for writing");
1213 switch (child_id = fork()) {
1215 adios(EX_OSERR, "fork", "unable to fork");
1220 dup2(fileno(out), 1);
1222 execvp("/bin/sh", vec);
1223 fprintf(stderr, "unable to exec ");
1230 if (pidXwait(child_id, NULL))
1243 ** Scan the content.
1245 ** 1) choose a transfer encoding.
1246 ** 2) check for clashes with multipart boundary string.
1247 ** 3) for text content, figure out which character set is being used.
1249 ** If there is a clash with one of the contents and the multipart boundary,
1250 ** this function will exit with NOTOK. This will cause the scanning process
1251 ** to be repeated with a different multipart boundary. It is possible
1252 ** (although highly unlikely) that this scan will be repeated multiple times.
1259 int check8bit = 0, contains8bit = 0;
1260 int checklinelen = 0, linelen = 0;
1261 int checkboundary = 0, boundaryclash = 0;
1262 int checklinespace = 0, linespace = 0; /* trailing whitespace */
1263 unsigned char *cp = NULL, buffer[BUFSIZ];
1264 struct text *t = NULL;
1266 CE ce = ct->c_cefile;
1269 ** handle multipart by scanning all subparts
1270 ** and then checking their encoding.
1272 if (ct->c_type == CT_MULTIPART) {
1273 struct multipart *m = (struct multipart *) ct->c_ctparams;
1276 /* initially mark the domain of enclosing multipart as 7bit */
1277 ct->c_encoding = CE_7BIT;
1279 for (part = m->mp_parts; part; part = part->mp_next) {
1280 CT p = part->mp_part;
1282 if (scan_content(p) == NOTOK) {
1283 /* choose encoding for subpart */
1288 ** if necessary, enlarge encoding for enclosing
1291 if (p->c_encoding == CE_BINARY)
1292 ct->c_encoding = CE_BINARY;
1293 if (p->c_encoding == CE_8BIT &&
1294 ct->c_encoding != CE_BINARY)
1295 ct->c_encoding = CE_8BIT;
1302 ** Decide what to check while scanning this content.
1304 switch (ct->c_type) {
1308 if (ct->c_subtype == TEXT_PLAIN) {
1324 case CT_APPLICATION:
1336 ** Scan the unencoded content
1338 if (check8bit || checklinelen || checklinespace || checkboundary) {
1339 if ((in = fopen(ce->ce_file, "r")) == NULL)
1340 adios(EX_IOERR, ce->ce_file, "unable to open for reading");
1341 len = strlen(prefix);
1343 while (fgets(buffer, sizeof(buffer) - 1, in)) {
1345 for (cp = buffer; *cp; cp++) {
1346 if (!isascii(*cp)) {
1348 /* no need to keep checking */
1354 if (checklinelen && (strlen(buffer) > CPERLIN + 1)) {
1356 checklinelen = 0; /* no need to keep checking */
1359 if (checklinespace &&
1360 (cp = buffer + strlen(buffer) - 2) >
1361 buffer && isspace(*cp)) {
1363 /* no need to keep checking */
1368 ** Check if content contains a line that clashes
1369 ** with our standard boundary for multipart messages.
1371 if (checkboundary && buffer[0] == '-' &&
1373 for (cp = buffer + strlen(buffer) - 1;
1378 if (strncmp(buffer + 2, prefix, len)==0 &&
1379 isdigit(buffer[2 + len])) {
1381 /* no need to keep checking */
1390 ** Decide which transfer encoding to use.
1392 switch (ct->c_type) {
1395 ** If the text content didn't specify a character
1396 ** set, we need to figure out which one was used.
1398 t = (struct text *) ct->c_ctparams;
1399 if (t->tx_charset == CHARSET_UNSPECIFIED) {
1400 CI ci = &ct->c_ctinfo;
1403 for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++)
1407 t->tx_charset = CHARSET_UNKNOWN;
1408 *ap = concat("charset=", write_charset_8bit(),
1411 t->tx_charset = CHARSET_USASCII;
1412 *ap = getcpy("charset=us-ascii");
1415 cp = strchr(*ap++, '=');
1421 if (contains8bit || linelen || linespace)
1422 ct->c_encoding = CE_QUOTED;
1424 ct->c_encoding = CE_7BIT;
1428 ct->c_encoding = CE_7BIT;
1431 case CT_APPLICATION:
1436 ** Forcing use of base64, because these types likely
1437 ** contain binary data and NUL bytes. Don't care about
1438 ** files that would be clean.
1440 ct->c_encoding = CE_BASE64;
1444 return (boundaryclash ? NOTOK : OK);
1449 ** Scan the content structures, and build header
1450 ** fields that will need to be output into the
1455 build_headers(CT ct)
1459 char *np, *vp, buffer[BUFSIZ];
1460 CI ci = &ct->c_ctinfo;
1463 ** If message is type multipart, then add the multipart
1464 ** boundary to the list of attribute/value pairs.
1466 if (ct->c_type == CT_MULTIPART) {
1468 static int level = 0; /* store nesting level */
1472 snprintf(buffer, sizeof(buffer), "boundary=%s%d",
1474 cp = strchr(*ap++ = getcpy(buffer), '=');
1481 ** output the content type and subtype
1483 np = getcpy(TYPE_FIELD);
1484 vp = concat(" ", ci->ci_type, "/", ci->ci_subtype, NULL);
1486 /* keep track of length of line */
1487 len = strlen(TYPE_FIELD) + strlen(ci->ci_type) +
1488 strlen(ci->ci_subtype) + 3;
1491 ** Append the attribute/value pairs to
1492 ** the end of the Content-Type line.
1494 for (ap = ci->ci_attrs, ep = ci->ci_values; *ap; ap++, ep++) {
1498 snprintf(buffer, sizeof(buffer), "%s=\"%s\"", *ap, *ep);
1499 if (len + 1 + (cc = strlen(buffer)) >= CPERLIN) {
1500 vp = add("\n\t", vp);
1506 vp = add(buffer, vp);
1511 ** Append any RFC-822 comment to the end of
1512 ** the Content-Type line.
1514 if (ci->ci_comment) {
1515 snprintf(buffer, sizeof(buffer), "(%s)", ci->ci_comment);
1516 if (len + 1 + (cc = 2 + strlen(ci->ci_comment)) >= CPERLIN) {
1517 vp = add("\n\t", vp);
1523 vp = add(buffer, vp);
1527 add_header(ct, np, vp);
1530 ** output the Content-ID
1533 np = getcpy(ID_FIELD);
1534 vp = concat(" ", ct->c_id, NULL);
1535 add_header(ct, np, vp);
1539 ** output the Content-Description
1542 np = getcpy(DESCR_FIELD);
1543 vp = concat(" ", ct->c_descr, NULL);
1544 if (encode_rfc2047(DESCR_FIELD, &vp, NULL)) {
1545 adios(EX_DATAERR, NULL, "Unable to encode %s header", DESCR_FIELD);
1547 add_header(ct, np, vp);
1551 ** output the Content-Disposition
1554 np = getcpy(DISPO_FIELD);
1555 vp = concat(" ", ct->c_dispo, NULL);
1556 add_header(ct, np, vp);
1560 ** output the Content-Transfer-Encoding
1562 switch (ct->c_encoding) {
1564 /* Nothing to output */
1568 if (ct->c_type == CT_MESSAGE)
1569 adios(EX_DATAERR, NULL, "internal error, invalid encoding");
1571 np = getcpy(ENCODING_FIELD);
1572 vp = concat(" ", "8bit", "\n", NULL);
1573 add_header(ct, np, vp);
1577 if (ct->c_type == CT_MESSAGE || ct->c_type == CT_MULTIPART)
1578 adios(EX_DATAERR, NULL, "internal error, invalid encoding");
1580 np = getcpy(ENCODING_FIELD);
1581 vp = concat(" ", "quoted-printable", "\n", NULL);
1582 add_header(ct, np, vp);
1586 if (ct->c_type == CT_MESSAGE || ct->c_type == CT_MULTIPART)
1587 adios(EX_DATAERR, NULL, "internal error, invalid encoding");
1589 np = getcpy(ENCODING_FIELD);
1590 vp = concat(" ", "base64", "\n", NULL);
1591 add_header(ct, np, vp);
1595 if (ct->c_type == CT_MESSAGE)
1596 adios(EX_DATAERR, NULL, "internal error, invalid encoding");
1598 np = getcpy(ENCODING_FIELD);
1599 vp = concat(" ", "binary", "\n", NULL);
1600 add_header(ct, np, vp);
1604 adios(EX_DATAERR, NULL, "unknown transfer encoding in content");
1609 ** Additional content specific header processing
1611 switch (ct->c_type) {
1614 struct multipart *m;
1617 m = (struct multipart *) ct->c_ctparams;
1618 for (part = m->mp_parts; part; part = part->mp_next) {