Expose the has_non_ascii() function
[debian-git.git] / builtin-mailinfo.c
blob92637ac0bae82d0b88e267b572a51a75299cda5c
1 /*
2 * Another stupid program, this one parsing the headers of an
3 * email to figure out authorship and subject
4 */
5 #include "cache.h"
6 #include "builtin.h"
7 #include "utf8.h"
8 #include "strbuf.h"
10 static FILE *cmitmsg, *patchfile, *fin, *fout;
12 static int keep_subject;
13 static const char *metainfo_charset;
14 static struct strbuf line = STRBUF_INIT;
15 static struct strbuf name = STRBUF_INIT;
16 static struct strbuf email = STRBUF_INIT;
18 static enum {
19 TE_DONTCARE, TE_QP, TE_BASE64,
20 } transfer_encoding;
21 static enum {
22 TYPE_TEXT, TYPE_OTHER,
23 } message_type;
25 static struct strbuf charset = STRBUF_INIT;
26 static int patch_lines;
27 static struct strbuf **p_hdr_data, **s_hdr_data;
29 #define MAX_HDR_PARSED 10
30 #define MAX_BOUNDARIES 5
32 static void cleanup_space(struct strbuf *sb);
35 static void get_sane_name(struct strbuf *out, struct strbuf *name, struct strbuf *email)
37 struct strbuf *src = name;
38 if (name->len < 3 || 60 < name->len || strchr(name->buf, '@') ||
39 strchr(name->buf, '<') || strchr(name->buf, '>'))
40 src = email;
41 else if (name == out)
42 return;
43 strbuf_reset(out);
44 strbuf_addbuf(out, src);
47 static void parse_bogus_from(const struct strbuf *line)
49 /* John Doe <johndoe> */
51 char *bra, *ket;
52 /* This is fallback, so do not bother if we already have an
53 * e-mail address.
55 if (email.len)
56 return;
58 bra = strchr(line->buf, '<');
59 if (!bra)
60 return;
61 ket = strchr(bra, '>');
62 if (!ket)
63 return;
65 strbuf_reset(&email);
66 strbuf_add(&email, bra + 1, ket - bra - 1);
68 strbuf_reset(&name);
69 strbuf_add(&name, line->buf, bra - line->buf);
70 strbuf_trim(&name);
71 get_sane_name(&name, &name, &email);
74 static void handle_from(const struct strbuf *from)
76 char *at;
77 size_t el;
78 struct strbuf f;
80 strbuf_init(&f, from->len);
81 strbuf_addbuf(&f, from);
83 at = strchr(f.buf, '@');
84 if (!at) {
85 parse_bogus_from(from);
86 return;
90 * If we already have one email, don't take any confusing lines
92 if (email.len && strchr(at + 1, '@')) {
93 strbuf_release(&f);
94 return;
97 /* Pick up the string around '@', possibly delimited with <>
98 * pair; that is the email part.
100 while (at > f.buf) {
101 char c = at[-1];
102 if (isspace(c))
103 break;
104 if (c == '<') {
105 at[-1] = ' ';
106 break;
108 at--;
110 el = strcspn(at, " \n\t\r\v\f>");
111 strbuf_reset(&email);
112 strbuf_add(&email, at, el);
113 strbuf_remove(&f, at - f.buf, el + (at[el] ? 1 : 0));
115 /* The remainder is name. It could be
117 * - "John Doe <john.doe@xz>" (a), or
118 * - "john.doe@xz (John Doe)" (b), or
119 * - "John (zzz) Doe <john.doe@xz> (Comment)" (c)
121 * but we have removed the email part, so
123 * - remove extra spaces which could stay after email (case 'c'), and
124 * - trim from both ends, possibly removing the () pair at the end
125 * (cases 'a' and 'b').
127 cleanup_space(&f);
128 strbuf_trim(&f);
129 if (f.buf[0] == '(' && f.len && f.buf[f.len - 1] == ')') {
130 strbuf_remove(&f, 0, 1);
131 strbuf_setlen(&f, f.len - 1);
134 get_sane_name(&name, &f, &email);
135 strbuf_release(&f);
138 static void handle_header(struct strbuf **out, const struct strbuf *line)
140 if (!*out) {
141 *out = xmalloc(sizeof(struct strbuf));
142 strbuf_init(*out, line->len);
143 } else
144 strbuf_reset(*out);
146 strbuf_addbuf(*out, line);
149 /* NOTE NOTE NOTE. We do not claim we do full MIME. We just attempt
150 * to have enough heuristics to grok MIME encoded patches often found
151 * on our mailing lists. For example, we do not even treat header lines
152 * case insensitively.
155 static int slurp_attr(const char *line, const char *name, struct strbuf *attr)
157 const char *ends, *ap = strcasestr(line, name);
158 size_t sz;
160 if (!ap) {
161 strbuf_setlen(attr, 0);
162 return 0;
164 ap += strlen(name);
165 if (*ap == '"') {
166 ap++;
167 ends = "\"";
169 else
170 ends = "; \t";
171 sz = strcspn(ap, ends);
172 strbuf_add(attr, ap, sz);
173 return 1;
176 static struct strbuf *content[MAX_BOUNDARIES];
178 static struct strbuf **content_top = content;
180 static void handle_content_type(struct strbuf *line)
182 struct strbuf *boundary = xmalloc(sizeof(struct strbuf));
183 strbuf_init(boundary, line->len);
185 if (!strcasestr(line->buf, "text/"))
186 message_type = TYPE_OTHER;
187 if (slurp_attr(line->buf, "boundary=", boundary)) {
188 strbuf_insert(boundary, 0, "--", 2);
189 if (++content_top > &content[MAX_BOUNDARIES]) {
190 fprintf(stderr, "Too many boundaries to handle\n");
191 exit(1);
193 *content_top = boundary;
194 boundary = NULL;
196 slurp_attr(line->buf, "charset=", &charset);
198 if (boundary) {
199 strbuf_release(boundary);
200 free(boundary);
204 static void handle_content_transfer_encoding(const struct strbuf *line)
206 if (strcasestr(line->buf, "base64"))
207 transfer_encoding = TE_BASE64;
208 else if (strcasestr(line->buf, "quoted-printable"))
209 transfer_encoding = TE_QP;
210 else
211 transfer_encoding = TE_DONTCARE;
214 static int is_multipart_boundary(const struct strbuf *line)
216 return (((*content_top)->len <= line->len) &&
217 !memcmp(line->buf, (*content_top)->buf, (*content_top)->len));
220 static void cleanup_subject(struct strbuf *subject)
222 char *pos;
223 size_t remove;
224 while (subject->len) {
225 switch (*subject->buf) {
226 case 'r': case 'R':
227 if (subject->len <= 3)
228 break;
229 if (!memcmp(subject->buf + 1, "e:", 2)) {
230 strbuf_remove(subject, 0, 3);
231 continue;
233 break;
234 case ' ': case '\t': case ':':
235 strbuf_remove(subject, 0, 1);
236 continue;
237 case '[':
238 if ((pos = strchr(subject->buf, ']'))) {
239 remove = pos - subject->buf;
240 if (remove <= (subject->len - remove) * 2) {
241 strbuf_remove(subject, 0, remove + 1);
242 continue;
244 } else
245 strbuf_remove(subject, 0, 1);
246 break;
248 strbuf_trim(subject);
249 return;
253 static void cleanup_space(struct strbuf *sb)
255 size_t pos, cnt;
256 for (pos = 0; pos < sb->len; pos++) {
257 if (isspace(sb->buf[pos])) {
258 sb->buf[pos] = ' ';
259 for (cnt = 0; isspace(sb->buf[pos + cnt + 1]); cnt++);
260 strbuf_remove(sb, pos + 1, cnt);
265 static void decode_header(struct strbuf *line);
266 static const char *header[MAX_HDR_PARSED] = {
267 "From","Subject","Date",
270 static inline int cmp_header(const struct strbuf *line, const char *hdr)
272 int len = strlen(hdr);
273 return !strncasecmp(line->buf, hdr, len) && line->len > len &&
274 line->buf[len] == ':' && isspace(line->buf[len + 1]);
277 static int check_header(const struct strbuf *line,
278 struct strbuf *hdr_data[], int overwrite)
280 int i, ret = 0, len;
281 struct strbuf sb = STRBUF_INIT;
282 /* search for the interesting parts */
283 for (i = 0; header[i]; i++) {
284 int len = strlen(header[i]);
285 if ((!hdr_data[i] || overwrite) && cmp_header(line, header[i])) {
286 /* Unwrap inline B and Q encoding, and optionally
287 * normalize the meta information to utf8.
289 strbuf_add(&sb, line->buf + len + 2, line->len - len - 2);
290 decode_header(&sb);
291 handle_header(&hdr_data[i], &sb);
292 ret = 1;
293 goto check_header_out;
297 /* Content stuff */
298 if (cmp_header(line, "Content-Type")) {
299 len = strlen("Content-Type: ");
300 strbuf_add(&sb, line->buf + len, line->len - len);
301 decode_header(&sb);
302 strbuf_insert(&sb, 0, "Content-Type: ", len);
303 handle_content_type(&sb);
304 ret = 1;
305 goto check_header_out;
307 if (cmp_header(line, "Content-Transfer-Encoding")) {
308 len = strlen("Content-Transfer-Encoding: ");
309 strbuf_add(&sb, line->buf + len, line->len - len);
310 decode_header(&sb);
311 handle_content_transfer_encoding(&sb);
312 ret = 1;
313 goto check_header_out;
316 /* for inbody stuff */
317 if (!prefixcmp(line->buf, ">From") && isspace(line->buf[5])) {
318 ret = 1; /* Should this return 0? */
319 goto check_header_out;
321 if (!prefixcmp(line->buf, "[PATCH]") && isspace(line->buf[7])) {
322 for (i = 0; header[i]; i++) {
323 if (!memcmp("Subject", header[i], 7)) {
324 handle_header(&hdr_data[i], line);
325 ret = 1;
326 goto check_header_out;
331 check_header_out:
332 strbuf_release(&sb);
333 return ret;
336 static int is_rfc2822_header(const struct strbuf *line)
339 * The section that defines the loosest possible
340 * field name is "3.6.8 Optional fields".
342 * optional-field = field-name ":" unstructured CRLF
343 * field-name = 1*ftext
344 * ftext = %d33-57 / %59-126
346 int ch;
347 char *cp = line->buf;
349 /* Count mbox From headers as headers */
350 if (!prefixcmp(cp, "From ") || !prefixcmp(cp, ">From "))
351 return 1;
353 while ((ch = *cp++)) {
354 if (ch == ':')
355 return 1;
356 if ((33 <= ch && ch <= 57) ||
357 (59 <= ch && ch <= 126))
358 continue;
359 break;
361 return 0;
364 static int read_one_header_line(struct strbuf *line, FILE *in)
366 /* Get the first part of the line. */
367 if (strbuf_getline(line, in, '\n'))
368 return 0;
371 * Is it an empty line or not a valid rfc2822 header?
372 * If so, stop here, and return false ("not a header")
374 strbuf_rtrim(line);
375 if (!line->len || !is_rfc2822_header(line)) {
376 /* Re-add the newline */
377 strbuf_addch(line, '\n');
378 return 0;
382 * Now we need to eat all the continuation lines..
383 * Yuck, 2822 header "folding"
385 for (;;) {
386 int peek;
387 struct strbuf continuation = STRBUF_INIT;
389 peek = fgetc(in); ungetc(peek, in);
390 if (peek != ' ' && peek != '\t')
391 break;
392 if (strbuf_getline(&continuation, in, '\n'))
393 break;
394 continuation.buf[0] = '\n';
395 strbuf_rtrim(&continuation);
396 strbuf_addbuf(line, &continuation);
399 return 1;
402 static struct strbuf *decode_q_segment(const struct strbuf *q_seg, int rfc2047)
404 const char *in = q_seg->buf;
405 int c;
406 struct strbuf *out = xmalloc(sizeof(struct strbuf));
407 strbuf_init(out, q_seg->len);
409 while ((c = *in++) != 0) {
410 if (c == '=') {
411 int d = *in++;
412 if (d == '\n' || !d)
413 break; /* drop trailing newline */
414 strbuf_addch(out, (hexval(d) << 4) | hexval(*in++));
415 continue;
417 if (rfc2047 && c == '_') /* rfc2047 4.2 (2) */
418 c = 0x20;
419 strbuf_addch(out, c);
421 return out;
424 static struct strbuf *decode_b_segment(const struct strbuf *b_seg)
426 /* Decode in..ep, possibly in-place to ot */
427 int c, pos = 0, acc = 0;
428 const char *in = b_seg->buf;
429 struct strbuf *out = xmalloc(sizeof(struct strbuf));
430 strbuf_init(out, b_seg->len);
432 while ((c = *in++) != 0) {
433 if (c == '+')
434 c = 62;
435 else if (c == '/')
436 c = 63;
437 else if ('A' <= c && c <= 'Z')
438 c -= 'A';
439 else if ('a' <= c && c <= 'z')
440 c -= 'a' - 26;
441 else if ('0' <= c && c <= '9')
442 c -= '0' - 52;
443 else
444 continue; /* garbage */
445 switch (pos++) {
446 case 0:
447 acc = (c << 2);
448 break;
449 case 1:
450 strbuf_addch(out, (acc | (c >> 4)));
451 acc = (c & 15) << 4;
452 break;
453 case 2:
454 strbuf_addch(out, (acc | (c >> 2)));
455 acc = (c & 3) << 6;
456 break;
457 case 3:
458 strbuf_addch(out, (acc | c));
459 acc = pos = 0;
460 break;
463 return out;
467 * When there is no known charset, guess.
469 * Right now we assume that if the target is UTF-8 (the default),
470 * and it already looks like UTF-8 (which includes US-ASCII as its
471 * subset, of course) then that is what it is and there is nothing
472 * to do.
474 * Otherwise, we default to assuming it is Latin1 for historical
475 * reasons.
477 static const char *guess_charset(const struct strbuf *line, const char *target_charset)
479 if (is_encoding_utf8(target_charset)) {
480 if (is_utf8(line->buf))
481 return NULL;
483 return "ISO8859-1";
486 static void convert_to_utf8(struct strbuf *line, const char *charset)
488 char *out;
490 if (!charset || !*charset) {
491 charset = guess_charset(line, metainfo_charset);
492 if (!charset)
493 return;
496 if (!strcasecmp(metainfo_charset, charset))
497 return;
498 out = reencode_string(line->buf, metainfo_charset, charset);
499 if (!out)
500 die("cannot convert from %s to %s",
501 charset, metainfo_charset);
502 strbuf_attach(line, out, strlen(out), strlen(out));
505 static int decode_header_bq(struct strbuf *it)
507 char *in, *ep, *cp;
508 struct strbuf outbuf = STRBUF_INIT, *dec;
509 struct strbuf charset_q = STRBUF_INIT, piecebuf = STRBUF_INIT;
510 int rfc2047 = 0;
512 in = it->buf;
513 while (in - it->buf <= it->len && (ep = strstr(in, "=?")) != NULL) {
514 int encoding;
515 strbuf_reset(&charset_q);
516 strbuf_reset(&piecebuf);
517 rfc2047 = 1;
519 if (in != ep) {
521 * We are about to process an encoded-word
522 * that begins at ep, but there is something
523 * before the encoded word.
525 char *scan;
526 for (scan = in; scan < ep; scan++)
527 if (!isspace(*scan))
528 break;
530 if (scan != ep || in == it->buf) {
532 * We should not lose that "something",
533 * unless we have just processed an
534 * encoded-word, and there is only LWS
535 * before the one we are about to process.
537 strbuf_add(&outbuf, in, ep - in);
540 /* E.g.
541 * ep : "=?iso-2022-jp?B?GyR...?= foo"
542 * ep : "=?ISO-8859-1?Q?Foo=FCbar?= baz"
544 ep += 2;
546 if (ep - it->buf >= it->len || !(cp = strchr(ep, '?')))
547 goto decode_header_bq_out;
549 if (cp + 3 - it->buf > it->len)
550 goto decode_header_bq_out;
551 strbuf_add(&charset_q, ep, cp - ep);
553 encoding = cp[1];
554 if (!encoding || cp[2] != '?')
555 goto decode_header_bq_out;
556 ep = strstr(cp + 3, "?=");
557 if (!ep)
558 goto decode_header_bq_out;
559 strbuf_add(&piecebuf, cp + 3, ep - cp - 3);
560 switch (tolower(encoding)) {
561 default:
562 goto decode_header_bq_out;
563 case 'b':
564 dec = decode_b_segment(&piecebuf);
565 break;
566 case 'q':
567 dec = decode_q_segment(&piecebuf, 1);
568 break;
570 if (metainfo_charset)
571 convert_to_utf8(dec, charset_q.buf);
573 strbuf_addbuf(&outbuf, dec);
574 strbuf_release(dec);
575 free(dec);
576 in = ep + 2;
578 strbuf_addstr(&outbuf, in);
579 strbuf_reset(it);
580 strbuf_addbuf(it, &outbuf);
581 decode_header_bq_out:
582 strbuf_release(&outbuf);
583 strbuf_release(&charset_q);
584 strbuf_release(&piecebuf);
585 return rfc2047;
588 static void decode_header(struct strbuf *it)
590 if (decode_header_bq(it))
591 return;
592 /* otherwise "it" is a straight copy of the input.
593 * This can be binary guck but there is no charset specified.
595 if (metainfo_charset)
596 convert_to_utf8(it, "");
599 static void decode_transfer_encoding(struct strbuf *line)
601 struct strbuf *ret;
603 switch (transfer_encoding) {
604 case TE_QP:
605 ret = decode_q_segment(line, 0);
606 break;
607 case TE_BASE64:
608 ret = decode_b_segment(line);
609 break;
610 case TE_DONTCARE:
611 default:
612 return;
614 strbuf_reset(line);
615 strbuf_addbuf(line, ret);
616 strbuf_release(ret);
617 free(ret);
620 static void handle_filter(struct strbuf *line);
622 static int find_boundary(void)
624 while (!strbuf_getline(&line, fin, '\n')) {
625 if (*content_top && is_multipart_boundary(&line))
626 return 1;
628 return 0;
631 static int handle_boundary(void)
633 struct strbuf newline = STRBUF_INIT;
635 strbuf_addch(&newline, '\n');
636 again:
637 if (line.len >= (*content_top)->len + 2 &&
638 !memcmp(line.buf + (*content_top)->len, "--", 2)) {
639 /* we hit an end boundary */
640 /* pop the current boundary off the stack */
641 strbuf_release(*content_top);
642 free(*content_top);
643 *content_top = NULL;
645 /* technically won't happen as is_multipart_boundary()
646 will fail first. But just in case..
648 if (--content_top < content) {
649 fprintf(stderr, "Detected mismatched boundaries, "
650 "can't recover\n");
651 exit(1);
653 handle_filter(&newline);
654 strbuf_release(&newline);
656 /* skip to the next boundary */
657 if (!find_boundary())
658 return 0;
659 goto again;
662 /* set some defaults */
663 transfer_encoding = TE_DONTCARE;
664 strbuf_reset(&charset);
665 message_type = TYPE_TEXT;
667 /* slurp in this section's info */
668 while (read_one_header_line(&line, fin))
669 check_header(&line, p_hdr_data, 0);
671 strbuf_release(&newline);
672 /* replenish line */
673 if (strbuf_getline(&line, fin, '\n'))
674 return 0;
675 strbuf_addch(&line, '\n');
676 return 1;
679 static inline int patchbreak(const struct strbuf *line)
681 size_t i;
683 /* Beginning of a "diff -" header? */
684 if (!prefixcmp(line->buf, "diff -"))
685 return 1;
687 /* CVS "Index: " line? */
688 if (!prefixcmp(line->buf, "Index: "))
689 return 1;
692 * "--- <filename>" starts patches without headers
693 * "---<sp>*" is a manual separator
695 if (line->len < 4)
696 return 0;
698 if (!prefixcmp(line->buf, "---")) {
699 /* space followed by a filename? */
700 if (line->buf[3] == ' ' && !isspace(line->buf[4]))
701 return 1;
702 /* Just whitespace? */
703 for (i = 3; i < line->len; i++) {
704 unsigned char c = line->buf[i];
705 if (c == '\n')
706 return 1;
707 if (!isspace(c))
708 break;
710 return 0;
712 return 0;
715 static int handle_commit_msg(struct strbuf *line)
717 static int still_looking = 1;
719 if (!cmitmsg)
720 return 0;
722 if (still_looking) {
723 strbuf_ltrim(line);
724 if (!line->len)
725 return 0;
726 if ((still_looking = check_header(line, s_hdr_data, 0)) != 0)
727 return 0;
730 /* normalize the log message to UTF-8. */
731 if (metainfo_charset)
732 convert_to_utf8(line, charset.buf);
734 if (patchbreak(line)) {
735 fclose(cmitmsg);
736 cmitmsg = NULL;
737 return 1;
740 fputs(line->buf, cmitmsg);
741 return 0;
744 static void handle_patch(const struct strbuf *line)
746 fwrite(line->buf, 1, line->len, patchfile);
747 patch_lines++;
750 static void handle_filter(struct strbuf *line)
752 static int filter = 0;
754 /* filter tells us which part we left off on */
755 switch (filter) {
756 case 0:
757 if (!handle_commit_msg(line))
758 break;
759 filter++;
760 case 1:
761 handle_patch(line);
762 break;
766 static void handle_body(void)
768 int len = 0;
769 struct strbuf prev = STRBUF_INIT;
771 /* Skip up to the first boundary */
772 if (*content_top) {
773 if (!find_boundary())
774 goto handle_body_out;
777 do {
778 strbuf_setlen(&line, line.len + len);
780 /* process any boundary lines */
781 if (*content_top && is_multipart_boundary(&line)) {
782 /* flush any leftover */
783 if (prev.len) {
784 handle_filter(&prev);
785 strbuf_reset(&prev);
787 if (!handle_boundary())
788 goto handle_body_out;
791 /* Unwrap transfer encoding */
792 decode_transfer_encoding(&line);
794 switch (transfer_encoding) {
795 case TE_BASE64:
796 case TE_QP:
798 struct strbuf **lines, **it, *sb;
800 /* Prepend any previous partial lines */
801 strbuf_insert(&line, 0, prev.buf, prev.len);
802 strbuf_reset(&prev);
804 /* binary data most likely doesn't have newlines */
805 if (message_type != TYPE_TEXT) {
806 handle_filter(&line);
807 break;
810 * This is a decoded line that may contain
811 * multiple new lines. Pass only one chunk
812 * at a time to handle_filter()
814 lines = strbuf_split(&line, '\n');
815 for (it = lines; (sb = *it); it++) {
816 if (*(it + 1) == NULL) /* The last line */
817 if (sb->buf[sb->len - 1] != '\n') {
818 /* Partial line, save it for later. */
819 strbuf_addbuf(&prev, sb);
820 break;
822 handle_filter(sb);
825 * The partial chunk is saved in "prev" and will be
826 * appended by the next iteration of read_line_with_nul().
828 strbuf_list_free(lines);
829 break;
831 default:
832 handle_filter(&line);
835 strbuf_reset(&line);
836 if (strbuf_avail(&line) < 100)
837 strbuf_grow(&line, 100);
838 } while ((len = read_line_with_nul(line.buf, strbuf_avail(&line), fin)));
840 handle_body_out:
841 strbuf_release(&prev);
844 static void output_header_lines(FILE *fout, const char *hdr, const struct strbuf *data)
846 const char *sp = data->buf;
847 while (1) {
848 char *ep = strchr(sp, '\n');
849 int len;
850 if (!ep)
851 len = strlen(sp);
852 else
853 len = ep - sp;
854 fprintf(fout, "%s: %.*s\n", hdr, len, sp);
855 if (!ep)
856 break;
857 sp = ep + 1;
861 static void handle_info(void)
863 struct strbuf *hdr;
864 int i;
866 for (i = 0; header[i]; i++) {
867 /* only print inbody headers if we output a patch file */
868 if (patch_lines && s_hdr_data[i])
869 hdr = s_hdr_data[i];
870 else if (p_hdr_data[i])
871 hdr = p_hdr_data[i];
872 else
873 continue;
875 if (!memcmp(header[i], "Subject", 7)) {
876 if (!keep_subject) {
877 cleanup_subject(hdr);
878 cleanup_space(hdr);
880 output_header_lines(fout, "Subject", hdr);
881 } else if (!memcmp(header[i], "From", 4)) {
882 cleanup_space(hdr);
883 handle_from(hdr);
884 fprintf(fout, "Author: %s\n", name.buf);
885 fprintf(fout, "Email: %s\n", email.buf);
886 } else {
887 cleanup_space(hdr);
888 fprintf(fout, "%s: %s\n", header[i], hdr->buf);
891 fprintf(fout, "\n");
894 static int mailinfo(FILE *in, FILE *out, int ks, const char *encoding,
895 const char *msg, const char *patch)
897 int peek;
898 keep_subject = ks;
899 metainfo_charset = encoding;
900 fin = in;
901 fout = out;
903 cmitmsg = fopen(msg, "w");
904 if (!cmitmsg) {
905 perror(msg);
906 return -1;
908 patchfile = fopen(patch, "w");
909 if (!patchfile) {
910 perror(patch);
911 fclose(cmitmsg);
912 return -1;
915 p_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(*p_hdr_data));
916 s_hdr_data = xcalloc(MAX_HDR_PARSED, sizeof(*s_hdr_data));
918 do {
919 peek = fgetc(in);
920 } while (isspace(peek));
921 ungetc(peek, in);
923 /* process the email header */
924 while (read_one_header_line(&line, fin))
925 check_header(&line, p_hdr_data, 1);
927 handle_body();
928 handle_info();
930 return 0;
933 static const char mailinfo_usage[] =
934 "git mailinfo [-k] [-u | --encoding=<encoding> | -n] msg patch <mail >info";
936 int cmd_mailinfo(int argc, const char **argv, const char *prefix)
938 const char *def_charset;
940 /* NEEDSWORK: might want to do the optional .git/ directory
941 * discovery
943 git_config(git_default_config, NULL);
945 def_charset = (git_commit_encoding ? git_commit_encoding : "UTF-8");
946 metainfo_charset = def_charset;
948 while (1 < argc && argv[1][0] == '-') {
949 if (!strcmp(argv[1], "-k"))
950 keep_subject = 1;
951 else if (!strcmp(argv[1], "-u"))
952 metainfo_charset = def_charset;
953 else if (!strcmp(argv[1], "-n"))
954 metainfo_charset = NULL;
955 else if (!prefixcmp(argv[1], "--encoding="))
956 metainfo_charset = argv[1] + 11;
957 else
958 usage(mailinfo_usage);
959 argc--; argv++;
962 if (argc != 3)
963 usage(mailinfo_usage);
965 return !!mailinfo(stdin, stdout, keep_subject, metainfo_charset, argv[1], argv[2]);