git

1
/*
2
 * ident.c
3
 *
4
 * create git identifier lines of the form "name <email> date"
5
 *
6
 * Copyright (C) 2005 Linus Torvalds
7
 */
8
#include "git-compat-util.h"
9
#include "ident.h"
10
#include "config.h"
11
#include "date.h"
12
#include "gettext.h"
13
#include "mailmap.h"
14
#include "strbuf.h"
15

16
static struct strbuf git_default_name = STRBUF_INIT;
17
static struct strbuf git_default_email = STRBUF_INIT;
18
static struct strbuf git_default_date = STRBUF_INIT;
19
static struct strbuf git_author_name = STRBUF_INIT;
20
static struct strbuf git_author_email = STRBUF_INIT;
21
static struct strbuf git_committer_name = STRBUF_INIT;
22
static struct strbuf git_committer_email = STRBUF_INIT;
23
static int default_email_is_bogus;
24
static int default_name_is_bogus;
25

26
static int ident_use_config_only;
27

28
#define IDENT_NAME_GIVEN 01
29
#define IDENT_MAIL_GIVEN 02
30
#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
31
static int committer_ident_explicitly_given;
32
static int author_ident_explicitly_given;
33
static int ident_config_given;
34

35
#ifdef NO_GECOS_IN_PWENT
36
#define get_gecos(ignored) "&"
37
#else
38
#define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos)
39
#endif
40

41
static struct passwd *xgetpwuid_self(int *is_bogus)
42
{
43
	struct passwd *pw;
44

45
	errno = 0;
46
	pw = getpwuid(getuid());
47
	if (!pw) {
48
		static struct passwd fallback;
49
		fallback.pw_name = (char *) "unknown";
50
#ifndef NO_GECOS_IN_PWENT
51
		fallback.pw_gecos = (char *) "Unknown";
52
#endif
53
		pw = &fallback;
54
		if (is_bogus)
55
			*is_bogus = 1;
56
	}
57
	return pw;
58
}
59

60
static void copy_gecos(const struct passwd *w, struct strbuf *name)
61
{
62
	char *src;
63

64
	/* Traditionally GECOS field had office phone numbers etc, separated
65
	 * with commas.  Also & stands for capitalized form of the login name.
66
	 */
67

68
	for (src = get_gecos(w); *src && *src != ','; src++) {
69
		int ch = *src;
70
		if (ch != '&')
71
			strbuf_addch(name, ch);
72
		else {
73
			/* Sorry, Mr. McDonald... */
74
			strbuf_addch(name, toupper(*w->pw_name));
75
			strbuf_addstr(name, w->pw_name + 1);
76
		}
77
	}
78
}
79

80
static int add_mailname_host(struct strbuf *buf)
81
{
82
	FILE *mailname;
83
	struct strbuf mailnamebuf = STRBUF_INIT;
84

85
	mailname = fopen_or_warn("/etc/mailname", "r");
86
	if (!mailname)
87
		return -1;
88

89
	if (strbuf_getline(&mailnamebuf, mailname) == EOF) {
90
		if (ferror(mailname))
91
			warning_errno("cannot read /etc/mailname");
92
		strbuf_release(&mailnamebuf);
93
		fclose(mailname);
94
		return -1;
95
	}
96
	/* success! */
97
	strbuf_addbuf(buf, &mailnamebuf);
98
	strbuf_release(&mailnamebuf);
99
	fclose(mailname);
100
	return 0;
101
}
102

103
static int canonical_name(const char *host, struct strbuf *out)
104
{
105
	int status = -1;
106

107
#ifndef NO_IPV6
108
	struct addrinfo hints, *ai;
109
	memset (&hints, '\0', sizeof (hints));
110
	hints.ai_flags = AI_CANONNAME;
111
	if (!getaddrinfo(host, NULL, &hints, &ai)) {
112
		if (ai && ai->ai_canonname && strchr(ai->ai_canonname, '.')) {
113
			strbuf_addstr(out, ai->ai_canonname);
114
			status = 0;
115
		}
116
		freeaddrinfo(ai);
117
	}
118
#else
119
	struct hostent *he = gethostbyname(host);
120
	if (he && strchr(he->h_name, '.')) {
121
		strbuf_addstr(out, he->h_name);
122
		status = 0;
123
	}
124
#endif /* NO_IPV6 */
125

126
	return status;
127
}
128

129
static void add_domainname(struct strbuf *out, int *is_bogus)
130
{
131
	char buf[HOST_NAME_MAX + 1];
132

133
	if (xgethostname(buf, sizeof(buf))) {
134
		warning_errno("cannot get host name");
135
		strbuf_addstr(out, "(none)");
136
		*is_bogus = 1;
137
		return;
138
	}
139
	if (strchr(buf, '.'))
140
		strbuf_addstr(out, buf);
141
	else if (canonical_name(buf, out) < 0) {
142
		strbuf_addf(out, "%s.(none)", buf);
143
		*is_bogus = 1;
144
	}
145
}
146

147
static void copy_email(const struct passwd *pw, struct strbuf *email,
148
		       int *is_bogus)
149
{
150
	/*
151
	 * Make up a fake email address
152
	 * (name + '@' + hostname [+ '.' + domainname])
153
	 */
154
	strbuf_addstr(email, pw->pw_name);
155
	strbuf_addch(email, '@');
156

157
	if (!add_mailname_host(email))
158
		return;	/* read from "/etc/mailname" (Debian) */
159
	add_domainname(email, is_bogus);
160
}
161

162
const char *ident_default_name(void)
163
{
164
	if (!(ident_config_given & IDENT_NAME_GIVEN) && !git_default_name.len) {
165
		copy_gecos(xgetpwuid_self(&default_name_is_bogus), &git_default_name);
166
		strbuf_trim(&git_default_name);
167
	}
168
	return git_default_name.buf;
169
}
170

171
const char *ident_default_email(void)
172
{
173
	if (!(ident_config_given & IDENT_MAIL_GIVEN) && !git_default_email.len) {
174
		const char *email = getenv("EMAIL");
175

176
		if (email && email[0]) {
177
			strbuf_addstr(&git_default_email, email);
178
			committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
179
			author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
180
		} else if ((email = query_user_email()) && email[0]) {
181
			strbuf_addstr(&git_default_email, email);
182
			free((char *)email);
183
		} else
184
			copy_email(xgetpwuid_self(&default_email_is_bogus),
185
				   &git_default_email, &default_email_is_bogus);
186
		strbuf_trim(&git_default_email);
187
	}
188
	return git_default_email.buf;
189
}
190

191
static const char *ident_default_date(void)
192
{
193
	if (!git_default_date.len)
194
		datestamp(&git_default_date);
195
	return git_default_date.buf;
196
}
197

198
void reset_ident_date(void)
199
{
200
	strbuf_reset(&git_default_date);
201
}
202

203
static int crud(unsigned char c)
204
{
205
	return  c <= 32  ||
206
		c == ',' ||
207
		c == ':' ||
208
		c == ';' ||
209
		c == '<' ||
210
		c == '>' ||
211
		c == '"' ||
212
		c == '\\' ||
213
		c == '\'';
214
}
215

216
static int has_non_crud(const char *str)
217
{
218
	for (; *str; str++) {
219
		if (!crud(*str))
220
			return 1;
221
	}
222
	return 0;
223
}
224

225
/*
226
 * Copy over a string to the destination, but avoid special
227
 * characters ('\n', '<' and '>') and remove crud at the end
228
 */
229
static void strbuf_addstr_without_crud(struct strbuf *sb, const char *src)
230
{
231
	size_t i, len;
232
	unsigned char c;
233

234
	/* Remove crud from the beginning.. */
235
	while ((c = *src) != 0) {
236
		if (!crud(c))
237
			break;
238
		src++;
239
	}
240

241
	/* Remove crud from the end.. */
242
	len = strlen(src);
243
	while (len > 0) {
244
		c = src[len-1];
245
		if (!crud(c))
246
			break;
247
		--len;
248
	}
249

250
	/*
251
	 * Copy the rest to the buffer, but avoid the special
252
	 * characters '\n' '<' and '>' that act as delimiters on
253
	 * an identification line. We can only remove crud, never add it,
254
	 * so 'len' is our maximum.
255
	 */
256
	strbuf_grow(sb, len);
257
	for (i = 0; i < len; i++) {
258
		c = *src++;
259
		switch (c) {
260
		case '\n': case '<': case '>':
261
			continue;
262
		}
263
		sb->buf[sb->len++] = c;
264
	}
265
	sb->buf[sb->len] = '\0';
266
}
267

268
/*
269
 * Reverse of fmt_ident(); given an ident line, split the fields
270
 * to allow the caller to parse it.
271
 * Signal a success by returning 0, but date/tz fields of the result
272
 * can still be NULL if the input line only has the name/email part
273
 * (e.g. reading from a reflog entry).
274
 */
275
int split_ident_line(struct ident_split *split, const char *line, int len)
276
{
277
	const char *cp;
278
	size_t span;
279
	int status = -1;
280

281
	memset(split, 0, sizeof(*split));
282

283
	split->name_begin = line;
284
	for (cp = line; *cp && cp < line + len; cp++)
285
		if (*cp == '<') {
286
			split->mail_begin = cp + 1;
287
			break;
288
		}
289
	if (!split->mail_begin)
290
		return status;
291

292
	for (cp = split->mail_begin - 2; line <= cp; cp--)
293
		if (!isspace(*cp)) {
294
			split->name_end = cp + 1;
295
			break;
296
		}
297
	if (!split->name_end) {
298
		/* no human readable name */
299
		split->name_end = split->name_begin;
300
	}
301

302
	for (cp = split->mail_begin; cp < line + len; cp++)
303
		if (*cp == '>') {
304
			split->mail_end = cp;
305
			break;
306
		}
307
	if (!split->mail_end)
308
		return status;
309

310
	/*
311
	 * Look from the end-of-line to find the trailing ">" of the mail
312
	 * address, even though we should already know it as split->mail_end.
313
	 * This can help in cases of broken idents with an extra ">" somewhere
314
	 * in the email address.  Note that we are assuming the timestamp will
315
	 * never have a ">" in it.
316
	 *
317
	 * Note that we will always find some ">" before going off the front of
318
	 * the string, because will always hit the split->mail_end closing
319
	 * bracket.
320
	 */
321
	for (cp = line + len - 1; *cp != '>'; cp--)
322
		;
323

324
	for (cp = cp + 1; cp < line + len && isspace(*cp); cp++)
325
		;
326
	if (line + len <= cp)
327
		goto person_only;
328
	split->date_begin = cp;
329
	span = strspn(cp, "0123456789");
330
	if (!span)
331
		goto person_only;
332
	split->date_end = split->date_begin + span;
333
	for (cp = split->date_end; cp < line + len && isspace(*cp); cp++)
334
		;
335
	if (line + len <= cp || (*cp != '+' && *cp != '-'))
336
		goto person_only;
337
	split->tz_begin = cp;
338
	span = strspn(cp + 1, "0123456789");
339
	if (!span)
340
		goto person_only;
341
	split->tz_end = split->tz_begin + 1 + span;
342
	return 0;
343

344
person_only:
345
	split->date_begin = NULL;
346
	split->date_end = NULL;
347
	split->tz_begin = NULL;
348
	split->tz_end = NULL;
349
	return 0;
350
}
351

352
/*
353
 * Returns the difference between the new and old length of the ident line.
354
 */
355
static ssize_t rewrite_ident_line(const char *person, size_t len,
356
				   struct strbuf *buf,
357
				   struct string_list *mailmap)
358
{
359
	size_t namelen, maillen;
360
	const char *name;
361
	const char *mail;
362
	struct ident_split ident;
363

364
	if (split_ident_line(&ident, person, len))
365
		return 0;
366

367
	mail = ident.mail_begin;
368
	maillen = ident.mail_end - ident.mail_begin;
369
	name = ident.name_begin;
370
	namelen = ident.name_end - ident.name_begin;
371

372
	if (map_user(mailmap, &mail, &maillen, &name, &namelen)) {
373
		struct strbuf namemail = STRBUF_INIT;
374
		size_t newlen;
375

376
		strbuf_addf(&namemail, "%.*s <%.*s>",
377
			    (int)namelen, name, (int)maillen, mail);
378

379
		strbuf_splice(buf, ident.name_begin - buf->buf,
380
			      ident.mail_end - ident.name_begin + 1,
381
			      namemail.buf, namemail.len);
382
		newlen = namemail.len;
383

384
		strbuf_release(&namemail);
385

386
		return newlen - (ident.mail_end - ident.name_begin);
387
	}
388

389
	return 0;
390
}
391

392
void apply_mailmap_to_header(struct strbuf *buf, const char **header,
393
			       struct string_list *mailmap)
394
{
395
	size_t buf_offset = 0;
396

397
	if (!mailmap)
398
		return;
399

400
	for (;;) {
401
		const char *person, *line;
402
		size_t i;
403
		int found_header = 0;
404

405
		line = buf->buf + buf_offset;
406
		if (!*line || *line == '\n')
407
			return; /* End of headers */
408

409
		for (i = 0; header[i]; i++)
410
			if (skip_prefix(line, header[i], &person)) {
411
				const char *endp = strchrnul(person, '\n');
412
				found_header = 1;
413
				buf_offset += endp - line;
414
				buf_offset += rewrite_ident_line(person, endp - person, buf, mailmap);
415
				break;
416
			}
417

418
		if (!found_header) {
419
			buf_offset = strchrnul(line, '\n') - buf->buf;
420
			if (buf->buf[buf_offset] == '\n')
421
				buf_offset++;
422
		}
423
	}
424
}
425

426
static void ident_env_hint(enum want_ident whose_ident)
427
{
428
	switch (whose_ident) {
429
	case WANT_AUTHOR_IDENT:
430
		fputs(_("Author identity unknown\n"), stderr);
431
		break;
432
	case WANT_COMMITTER_IDENT:
433
		fputs(_("Committer identity unknown\n"), stderr);
434
		break;
435
	default:
436
		break;
437
	}
438

439
	fputs(_("\n"
440
		"*** Please tell me who you are.\n"
441
		"\n"
442
		"Run\n"
443
		"\n"
444
		"  git config --global user.email \"you@example.com\"\n"
445
		"  git config --global user.name \"Your Name\"\n"
446
		"\n"
447
		"to set your account\'s default identity.\n"
448
		"Omit --global to set the identity only in this repository.\n"
449
		"\n"), stderr);
450
}
451

452
const char *fmt_ident(const char *name, const char *email,
453
		      enum want_ident whose_ident, const char *date_str, int flag)
454
{
455
	static int index;
456
	static struct strbuf ident_pool[2] = { STRBUF_INIT, STRBUF_INIT };
457
	int strict = (flag & IDENT_STRICT);
458
	int want_date = !(flag & IDENT_NO_DATE);
459
	int want_name = !(flag & IDENT_NO_NAME);
460

461
	struct strbuf *ident = &ident_pool[index];
462
	index = (index + 1) % ARRAY_SIZE(ident_pool);
463

464
	if (!email) {
465
		if (whose_ident == WANT_AUTHOR_IDENT && git_author_email.len)
466
			email = git_author_email.buf;
467
		else if (whose_ident == WANT_COMMITTER_IDENT && git_committer_email.len)
468
			email = git_committer_email.buf;
469
	}
470
	if (!email) {
471
		if (strict && ident_use_config_only
472
		    && !(ident_config_given & IDENT_MAIL_GIVEN)) {
473
			ident_env_hint(whose_ident);
474
			die(_("no email was given and auto-detection is disabled"));
475
		}
476
		email = ident_default_email();
477
		if (strict && default_email_is_bogus) {
478
			ident_env_hint(whose_ident);
479
			die(_("unable to auto-detect email address (got '%s')"), email);
480
		}
481
	}
482

483
	if (want_name) {
484
		int using_default = 0;
485
		if (!name) {
486
			if (whose_ident == WANT_AUTHOR_IDENT && git_author_name.len)
487
				name = git_author_name.buf;
488
			else if (whose_ident == WANT_COMMITTER_IDENT &&
489
					git_committer_name.len)
490
				name = git_committer_name.buf;
491
		}
492
		if (!name) {
493
			if (strict && ident_use_config_only
494
			    && !(ident_config_given & IDENT_NAME_GIVEN)) {
495
				ident_env_hint(whose_ident);
496
				die(_("no name was given and auto-detection is disabled"));
497
			}
498
			name = ident_default_name();
499
			using_default = 1;
500
			if (strict && default_name_is_bogus) {
501
				ident_env_hint(whose_ident);
502
				die(_("unable to auto-detect name (got '%s')"), name);
503
			}
504
		}
505
		if (!*name) {
506
			struct passwd *pw;
507
			if (strict) {
508
				if (using_default)
509
					ident_env_hint(whose_ident);
510
				die(_("empty ident name (for <%s>) not allowed"), email);
511
			}
512
			pw = xgetpwuid_self(NULL);
513
			name = pw->pw_name;
514
		}
515
		if (strict && !has_non_crud(name))
516
			die(_("name consists only of disallowed characters: %s"), name);
517
	}
518

519
	strbuf_reset(ident);
520
	if (want_name) {
521
		strbuf_addstr_without_crud(ident, name);
522
		strbuf_addstr(ident, " <");
523
	}
524
	strbuf_addstr_without_crud(ident, email);
525
	if (want_name)
526
		strbuf_addch(ident, '>');
527
	if (want_date) {
528
		strbuf_addch(ident, ' ');
529
		if (date_str && date_str[0]) {
530
			if (parse_date(date_str, ident) < 0)
531
				die(_("invalid date format: %s"), date_str);
532
		}
533
		else
534
			strbuf_addstr(ident, ident_default_date());
535
	}
536

537
	return ident->buf;
538
}
539

540
const char *fmt_name(enum want_ident whose_ident)
541
{
542
	char *name = NULL;
543
	char *email = NULL;
544

545
	switch (whose_ident) {
546
	case WANT_BLANK_IDENT:
547
		break;
548
	case WANT_AUTHOR_IDENT:
549
		name = getenv("GIT_AUTHOR_NAME");
550
		email = getenv("GIT_AUTHOR_EMAIL");
551
		break;
552
	case WANT_COMMITTER_IDENT:
553
		name = getenv("GIT_COMMITTER_NAME");
554
		email = getenv("GIT_COMMITTER_EMAIL");
555
		break;
556
	}
557
	return fmt_ident(name, email, whose_ident, NULL,
558
			IDENT_STRICT | IDENT_NO_DATE);
559
}
560

561
const char *git_author_info(int flag)
562
{
563
	if (getenv("GIT_AUTHOR_NAME"))
564
		author_ident_explicitly_given |= IDENT_NAME_GIVEN;
565
	if (getenv("GIT_AUTHOR_EMAIL"))
566
		author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
567
	return fmt_ident(getenv("GIT_AUTHOR_NAME"),
568
			 getenv("GIT_AUTHOR_EMAIL"),
569
			 WANT_AUTHOR_IDENT,
570
			 getenv("GIT_AUTHOR_DATE"),
571
			 flag);
572
}
573

574
const char *git_committer_info(int flag)
575
{
576
	if (getenv("GIT_COMMITTER_NAME"))
577
		committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
578
	if (getenv("GIT_COMMITTER_EMAIL"))
579
		committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
580
	return fmt_ident(getenv("GIT_COMMITTER_NAME"),
581
			 getenv("GIT_COMMITTER_EMAIL"),
582
			 WANT_COMMITTER_IDENT,
583
			 getenv("GIT_COMMITTER_DATE"),
584
			 flag);
585
}
586

587
static int ident_is_sufficient(int user_ident_explicitly_given)
588
{
589
#ifndef WINDOWS
590
	return (user_ident_explicitly_given & IDENT_MAIL_GIVEN);
591
#else
592
	return (user_ident_explicitly_given == IDENT_ALL_GIVEN);
593
#endif
594
}
595

596
int committer_ident_sufficiently_given(void)
597
{
598
	return ident_is_sufficient(committer_ident_explicitly_given);
599
}
600

601
int author_ident_sufficiently_given(void)
602
{
603
	return ident_is_sufficient(author_ident_explicitly_given);
604
}
605

606
static int set_ident(const char *var, const char *value)
607
{
608
	if (!strcmp(var, "author.name")) {
609
		if (!value)
610
			return config_error_nonbool(var);
611
		strbuf_reset(&git_author_name);
612
		strbuf_addstr(&git_author_name, value);
613
		author_ident_explicitly_given |= IDENT_NAME_GIVEN;
614
		ident_config_given |= IDENT_NAME_GIVEN;
615
		return 0;
616
	}
617

618
	if (!strcmp(var, "author.email")) {
619
		if (!value)
620
			return config_error_nonbool(var);
621
		strbuf_reset(&git_author_email);
622
		strbuf_addstr(&git_author_email, value);
623
		author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
624
		ident_config_given |= IDENT_MAIL_GIVEN;
625
		return 0;
626
	}
627

628
	if (!strcmp(var, "committer.name")) {
629
		if (!value)
630
			return config_error_nonbool(var);
631
		strbuf_reset(&git_committer_name);
632
		strbuf_addstr(&git_committer_name, value);
633
		committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
634
		ident_config_given |= IDENT_NAME_GIVEN;
635
		return 0;
636
	}
637

638
	if (!strcmp(var, "committer.email")) {
639
		if (!value)
640
			return config_error_nonbool(var);
641
		strbuf_reset(&git_committer_email);
642
		strbuf_addstr(&git_committer_email, value);
643
		committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
644
		ident_config_given |= IDENT_MAIL_GIVEN;
645
		return 0;
646
	}
647

648
	if (!strcmp(var, "user.name")) {
649
		if (!value)
650
			return config_error_nonbool(var);
651
		strbuf_reset(&git_default_name);
652
		strbuf_addstr(&git_default_name, value);
653
		committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
654
		author_ident_explicitly_given |= IDENT_NAME_GIVEN;
655
		ident_config_given |= IDENT_NAME_GIVEN;
656
		return 0;
657
	}
658

659
	if (!strcmp(var, "user.email")) {
660
		if (!value)
661
			return config_error_nonbool(var);
662
		strbuf_reset(&git_default_email);
663
		strbuf_addstr(&git_default_email, value);
664
		committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
665
		author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
666
		ident_config_given |= IDENT_MAIL_GIVEN;
667
		return 0;
668
	}
669

670
	return 0;
671
}
672

673
int git_ident_config(const char *var, const char *value,
674
		     const struct config_context *ctx UNUSED,
675
		     void *data UNUSED)
676
{
677
	if (!strcmp(var, "user.useconfigonly")) {
678
		ident_use_config_only = git_config_bool(var, value);
679
		return 0;
680
	}
681

682
	return set_ident(var, value);
683
}
684

685
static void set_env_if(const char *key, const char *value, int *given, int bit)
686
{
687
	if ((*given & bit) || getenv(key))
688
		return; /* nothing to do */
689
	setenv(key, value, 0);
690
	*given |= bit;
691
}
692

693
void prepare_fallback_ident(const char *name, const char *email)
694
{
695
	set_env_if("GIT_AUTHOR_NAME", name,
696
		   &author_ident_explicitly_given, IDENT_NAME_GIVEN);
697
	set_env_if("GIT_AUTHOR_EMAIL", email,
698
		   &author_ident_explicitly_given, IDENT_MAIL_GIVEN);
699
	set_env_if("GIT_COMMITTER_NAME", name,
700
		   &committer_ident_explicitly_given, IDENT_NAME_GIVEN);
701
	set_env_if("GIT_COMMITTER_EMAIL", email,
702
		   &committer_ident_explicitly_given, IDENT_MAIL_GIVEN);
703
}
704

705
static int buf_cmp(const char *a_begin, const char *a_end,
706
		   const char *b_begin, const char *b_end)
707
{
708
	int a_len = a_end - a_begin;
709
	int b_len = b_end - b_begin;
710
	int min = a_len < b_len ? a_len : b_len;
711
	int cmp;
712

713
	cmp = memcmp(a_begin, b_begin, min);
714
	if (cmp)
715
		return cmp;
716

717
	return a_len - b_len;
718
}
719

720
int ident_cmp(const struct ident_split *a,
721
	      const struct ident_split *b)
722
{
723
	int cmp;
724

725
	cmp = buf_cmp(a->mail_begin, a->mail_end,
726
		      b->mail_begin, b->mail_end);
727
	if (cmp)
728
		return cmp;
729

730
	return buf_cmp(a->name_begin, a->name_end,
731
		       b->name_begin, b->name_end);
732
}
733