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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 "cache.h" | |
9 | #include "config.h" | |
10 | ||
11 | static struct strbuf git_default_name = STRBUF_INIT; | |
12 | static struct strbuf git_default_email = STRBUF_INIT; | |
13 | static struct strbuf git_default_date = STRBUF_INIT; | |
14 | static struct strbuf git_author_name = STRBUF_INIT; | |
15 | static struct strbuf git_author_email = STRBUF_INIT; | |
16 | static struct strbuf git_committer_name = STRBUF_INIT; | |
17 | static struct strbuf git_committer_email = STRBUF_INIT; | |
18 | static int default_email_is_bogus; | |
19 | static int default_name_is_bogus; | |
20 | ||
21 | static int ident_use_config_only; | |
22 | ||
23 | #define IDENT_NAME_GIVEN 01 | |
24 | #define IDENT_MAIL_GIVEN 02 | |
25 | #define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN) | |
26 | static int committer_ident_explicitly_given; | |
27 | static int author_ident_explicitly_given; | |
28 | static int ident_config_given; | |
29 | ||
30 | #ifdef NO_GECOS_IN_PWENT | |
31 | #define get_gecos(ignored) "&" | |
32 | #else | |
33 | #define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos) | |
34 | #endif | |
35 | ||
36 | static struct passwd *xgetpwuid_self(int *is_bogus) | |
37 | { | |
38 | struct passwd *pw; | |
39 | ||
40 | errno = 0; | |
41 | pw = getpwuid(getuid()); | |
42 | if (!pw) { | |
43 | static struct passwd fallback; | |
44 | fallback.pw_name = "unknown"; | |
45 | #ifndef NO_GECOS_IN_PWENT | |
46 | fallback.pw_gecos = "Unknown"; | |
47 | #endif | |
48 | pw = &fallback; | |
49 | if (is_bogus) | |
50 | *is_bogus = 1; | |
51 | } | |
52 | return pw; | |
53 | } | |
54 | ||
55 | static void copy_gecos(const struct passwd *w, struct strbuf *name) | |
56 | { | |
57 | char *src; | |
58 | ||
59 | /* Traditionally GECOS field had office phone numbers etc, separated | |
60 | * with commas. Also & stands for capitalized form of the login name. | |
61 | */ | |
62 | ||
63 | for (src = get_gecos(w); *src && *src != ','; src++) { | |
64 | int ch = *src; | |
65 | if (ch != '&') | |
66 | strbuf_addch(name, ch); | |
67 | else { | |
68 | /* Sorry, Mr. McDonald... */ | |
69 | strbuf_addch(name, toupper(*w->pw_name)); | |
70 | strbuf_addstr(name, w->pw_name + 1); | |
71 | } | |
72 | } | |
73 | } | |
74 | ||
75 | static int add_mailname_host(struct strbuf *buf) | |
76 | { | |
77 | FILE *mailname; | |
78 | struct strbuf mailnamebuf = STRBUF_INIT; | |
79 | ||
80 | mailname = fopen_or_warn("/etc/mailname", "r"); | |
81 | if (!mailname) | |
82 | return -1; | |
83 | ||
84 | if (strbuf_getline(&mailnamebuf, mailname) == EOF) { | |
85 | if (ferror(mailname)) | |
86 | warning_errno("cannot read /etc/mailname"); | |
87 | strbuf_release(&mailnamebuf); | |
88 | fclose(mailname); | |
89 | return -1; | |
90 | } | |
91 | /* success! */ | |
92 | strbuf_addbuf(buf, &mailnamebuf); | |
93 | strbuf_release(&mailnamebuf); | |
94 | fclose(mailname); | |
95 | return 0; | |
96 | } | |
97 | ||
98 | static int canonical_name(const char *host, struct strbuf *out) | |
99 | { | |
100 | int status = -1; | |
101 | ||
102 | #ifndef NO_IPV6 | |
103 | struct addrinfo hints, *ai; | |
104 | memset (&hints, '\0', sizeof (hints)); | |
105 | hints.ai_flags = AI_CANONNAME; | |
106 | if (!getaddrinfo(host, NULL, &hints, &ai)) { | |
107 | if (ai && ai->ai_canonname && strchr(ai->ai_canonname, '.')) { | |
108 | strbuf_addstr(out, ai->ai_canonname); | |
109 | status = 0; | |
110 | } | |
111 | freeaddrinfo(ai); | |
112 | } | |
113 | #else | |
114 | struct hostent *he = gethostbyname(host); | |
115 | if (he && strchr(he->h_name, '.')) { | |
116 | strbuf_addstr(out, he->h_name); | |
117 | status = 0; | |
118 | } | |
119 | #endif /* NO_IPV6 */ | |
120 | ||
121 | return status; | |
122 | } | |
123 | ||
124 | static void add_domainname(struct strbuf *out, int *is_bogus) | |
125 | { | |
126 | char buf[HOST_NAME_MAX + 1]; | |
127 | ||
128 | if (xgethostname(buf, sizeof(buf))) { | |
129 | warning_errno("cannot get host name"); | |
130 | strbuf_addstr(out, "(none)"); | |
131 | *is_bogus = 1; | |
132 | return; | |
133 | } | |
134 | if (strchr(buf, '.')) | |
135 | strbuf_addstr(out, buf); | |
136 | else if (canonical_name(buf, out) < 0) { | |
137 | strbuf_addf(out, "%s.(none)", buf); | |
138 | *is_bogus = 1; | |
139 | } | |
140 | } | |
141 | ||
142 | static void copy_email(const struct passwd *pw, struct strbuf *email, | |
143 | int *is_bogus) | |
144 | { | |
145 | /* | |
146 | * Make up a fake email address | |
147 | * (name + '@' + hostname [+ '.' + domainname]) | |
148 | */ | |
149 | strbuf_addstr(email, pw->pw_name); | |
150 | strbuf_addch(email, '@'); | |
151 | ||
152 | if (!add_mailname_host(email)) | |
153 | return; /* read from "/etc/mailname" (Debian) */ | |
154 | add_domainname(email, is_bogus); | |
155 | } | |
156 | ||
157 | const char *ident_default_name(void) | |
158 | { | |
159 | if (!(ident_config_given & IDENT_NAME_GIVEN) && !git_default_name.len) { | |
160 | copy_gecos(xgetpwuid_self(&default_name_is_bogus), &git_default_name); | |
161 | strbuf_trim(&git_default_name); | |
162 | } | |
163 | return git_default_name.buf; | |
164 | } | |
165 | ||
166 | const char *ident_default_email(void) | |
167 | { | |
168 | if (!(ident_config_given & IDENT_MAIL_GIVEN) && !git_default_email.len) { | |
169 | const char *email = getenv("EMAIL"); | |
170 | ||
171 | if (email && email[0]) { | |
172 | strbuf_addstr(&git_default_email, email); | |
173 | committer_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
174 | author_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
175 | } else if ((email = query_user_email()) && email[0]) { | |
176 | strbuf_addstr(&git_default_email, email); | |
177 | free((char *)email); | |
178 | } else | |
179 | copy_email(xgetpwuid_self(&default_email_is_bogus), | |
180 | &git_default_email, &default_email_is_bogus); | |
181 | strbuf_trim(&git_default_email); | |
182 | } | |
183 | return git_default_email.buf; | |
184 | } | |
185 | ||
186 | static const char *ident_default_date(void) | |
187 | { | |
188 | if (!git_default_date.len) | |
189 | datestamp(&git_default_date); | |
190 | return git_default_date.buf; | |
191 | } | |
192 | ||
193 | void reset_ident_date(void) | |
194 | { | |
195 | strbuf_reset(&git_default_date); | |
196 | } | |
197 | ||
198 | static int crud(unsigned char c) | |
199 | { | |
200 | return c <= 32 || | |
201 | c == '.' || | |
202 | c == ',' || | |
203 | c == ':' || | |
204 | c == ';' || | |
205 | c == '<' || | |
206 | c == '>' || | |
207 | c == '"' || | |
208 | c == '\\' || | |
209 | c == '\''; | |
210 | } | |
211 | ||
212 | static int has_non_crud(const char *str) | |
213 | { | |
214 | for (; *str; str++) { | |
215 | if (!crud(*str)) | |
216 | return 1; | |
217 | } | |
218 | return 0; | |
219 | } | |
220 | ||
221 | /* | |
222 | * Copy over a string to the destination, but avoid special | |
223 | * characters ('\n', '<' and '>') and remove crud at the end | |
224 | */ | |
225 | static void strbuf_addstr_without_crud(struct strbuf *sb, const char *src) | |
226 | { | |
227 | size_t i, len; | |
228 | unsigned char c; | |
229 | ||
230 | /* Remove crud from the beginning.. */ | |
231 | while ((c = *src) != 0) { | |
232 | if (!crud(c)) | |
233 | break; | |
234 | src++; | |
235 | } | |
236 | ||
237 | /* Remove crud from the end.. */ | |
238 | len = strlen(src); | |
239 | while (len > 0) { | |
240 | c = src[len-1]; | |
241 | if (!crud(c)) | |
242 | break; | |
243 | --len; | |
244 | } | |
245 | ||
246 | /* | |
247 | * Copy the rest to the buffer, but avoid the special | |
248 | * characters '\n' '<' and '>' that act as delimiters on | |
249 | * an identification line. We can only remove crud, never add it, | |
250 | * so 'len' is our maximum. | |
251 | */ | |
252 | strbuf_grow(sb, len); | |
253 | for (i = 0; i < len; i++) { | |
254 | c = *src++; | |
255 | switch (c) { | |
256 | case '\n': case '<': case '>': | |
257 | continue; | |
258 | } | |
259 | sb->buf[sb->len++] = c; | |
260 | } | |
261 | sb->buf[sb->len] = '\0'; | |
262 | } | |
263 | ||
264 | /* | |
265 | * Reverse of fmt_ident(); given an ident line, split the fields | |
266 | * to allow the caller to parse it. | |
267 | * Signal a success by returning 0, but date/tz fields of the result | |
268 | * can still be NULL if the input line only has the name/email part | |
269 | * (e.g. reading from a reflog entry). | |
270 | */ | |
271 | int split_ident_line(struct ident_split *split, const char *line, int len) | |
272 | { | |
273 | const char *cp; | |
274 | size_t span; | |
275 | int status = -1; | |
276 | ||
277 | memset(split, 0, sizeof(*split)); | |
278 | ||
279 | split->name_begin = line; | |
280 | for (cp = line; *cp && cp < line + len; cp++) | |
281 | if (*cp == '<') { | |
282 | split->mail_begin = cp + 1; | |
283 | break; | |
284 | } | |
285 | if (!split->mail_begin) | |
286 | return status; | |
287 | ||
288 | for (cp = split->mail_begin - 2; line <= cp; cp--) | |
289 | if (!isspace(*cp)) { | |
290 | split->name_end = cp + 1; | |
291 | break; | |
292 | } | |
293 | if (!split->name_end) { | |
294 | /* no human readable name */ | |
295 | split->name_end = split->name_begin; | |
296 | } | |
297 | ||
298 | for (cp = split->mail_begin; cp < line + len; cp++) | |
299 | if (*cp == '>') { | |
300 | split->mail_end = cp; | |
301 | break; | |
302 | } | |
303 | if (!split->mail_end) | |
304 | return status; | |
305 | ||
306 | /* | |
307 | * Look from the end-of-line to find the trailing ">" of the mail | |
308 | * address, even though we should already know it as split->mail_end. | |
309 | * This can help in cases of broken idents with an extra ">" somewhere | |
310 | * in the email address. Note that we are assuming the timestamp will | |
311 | * never have a ">" in it. | |
312 | * | |
313 | * Note that we will always find some ">" before going off the front of | |
314 | * the string, because will always hit the split->mail_end closing | |
315 | * bracket. | |
316 | */ | |
317 | for (cp = line + len - 1; *cp != '>'; cp--) | |
318 | ; | |
319 | ||
320 | for (cp = cp + 1; cp < line + len && isspace(*cp); cp++) | |
321 | ; | |
322 | if (line + len <= cp) | |
323 | goto person_only; | |
324 | split->date_begin = cp; | |
325 | span = strspn(cp, "0123456789"); | |
326 | if (!span) | |
327 | goto person_only; | |
328 | split->date_end = split->date_begin + span; | |
329 | for (cp = split->date_end; cp < line + len && isspace(*cp); cp++) | |
330 | ; | |
331 | if (line + len <= cp || (*cp != '+' && *cp != '-')) | |
332 | goto person_only; | |
333 | split->tz_begin = cp; | |
334 | span = strspn(cp + 1, "0123456789"); | |
335 | if (!span) | |
336 | goto person_only; | |
337 | split->tz_end = split->tz_begin + 1 + span; | |
338 | return 0; | |
339 | ||
340 | person_only: | |
341 | split->date_begin = NULL; | |
342 | split->date_end = NULL; | |
343 | split->tz_begin = NULL; | |
344 | split->tz_end = NULL; | |
345 | return 0; | |
346 | } | |
347 | ||
348 | static const char *env_hint = | |
349 | N_("\n" | |
350 | "*** Please tell me who you are.\n" | |
351 | "\n" | |
352 | "Run\n" | |
353 | "\n" | |
354 | " git config --global user.email \"you@example.com\"\n" | |
355 | " git config --global user.name \"Your Name\"\n" | |
356 | "\n" | |
357 | "to set your account\'s default identity.\n" | |
358 | "Omit --global to set the identity only in this repository.\n" | |
359 | "\n"); | |
360 | ||
361 | const char *fmt_ident(const char *name, const char *email, | |
362 | enum want_ident whose_ident, const char *date_str, int flag) | |
363 | { | |
364 | static struct strbuf ident = STRBUF_INIT; | |
365 | int strict = (flag & IDENT_STRICT); | |
366 | int want_date = !(flag & IDENT_NO_DATE); | |
367 | int want_name = !(flag & IDENT_NO_NAME); | |
368 | ||
369 | if (!email) { | |
370 | if (whose_ident == WANT_AUTHOR_IDENT && git_author_email.len) | |
371 | email = git_author_email.buf; | |
372 | else if (whose_ident == WANT_COMMITTER_IDENT && git_committer_email.len) | |
373 | email = git_committer_email.buf; | |
374 | } | |
375 | if (!email) { | |
376 | if (strict && ident_use_config_only | |
377 | && !(ident_config_given & IDENT_MAIL_GIVEN)) { | |
378 | fputs(_(env_hint), stderr); | |
379 | die(_("no email was given and auto-detection is disabled")); | |
380 | } | |
381 | email = ident_default_email(); | |
382 | if (strict && default_email_is_bogus) { | |
383 | fputs(_(env_hint), stderr); | |
384 | die(_("unable to auto-detect email address (got '%s')"), email); | |
385 | } | |
386 | } | |
387 | ||
388 | if (want_name) { | |
389 | int using_default = 0; | |
390 | if (!name) { | |
391 | if (whose_ident == WANT_AUTHOR_IDENT && git_author_name.len) | |
392 | name = git_author_name.buf; | |
393 | else if (whose_ident == WANT_COMMITTER_IDENT && | |
394 | git_committer_name.len) | |
395 | name = git_committer_name.buf; | |
396 | } | |
397 | if (!name) { | |
398 | if (strict && ident_use_config_only | |
399 | && !(ident_config_given & IDENT_NAME_GIVEN)) { | |
400 | fputs(_(env_hint), stderr); | |
401 | die(_("no name was given and auto-detection is disabled")); | |
402 | } | |
403 | name = ident_default_name(); | |
404 | using_default = 1; | |
405 | if (strict && default_name_is_bogus) { | |
406 | fputs(_(env_hint), stderr); | |
407 | die(_("unable to auto-detect name (got '%s')"), name); | |
408 | } | |
409 | } | |
410 | if (!*name) { | |
411 | struct passwd *pw; | |
412 | if (strict) { | |
413 | if (using_default) | |
414 | fputs(_(env_hint), stderr); | |
415 | die(_("empty ident name (for <%s>) not allowed"), email); | |
416 | } | |
417 | pw = xgetpwuid_self(NULL); | |
418 | name = pw->pw_name; | |
419 | } | |
420 | if (strict && !has_non_crud(name)) | |
421 | die(_("name consists only of disallowed characters: %s"), name); | |
422 | } | |
423 | ||
424 | strbuf_reset(&ident); | |
425 | if (want_name) { | |
426 | strbuf_addstr_without_crud(&ident, name); | |
427 | strbuf_addstr(&ident, " <"); | |
428 | } | |
429 | strbuf_addstr_without_crud(&ident, email); | |
430 | if (want_name) | |
431 | strbuf_addch(&ident, '>'); | |
432 | if (want_date) { | |
433 | strbuf_addch(&ident, ' '); | |
434 | if (date_str && date_str[0]) { | |
435 | if (parse_date(date_str, &ident) < 0) | |
436 | die(_("invalid date format: %s"), date_str); | |
437 | } | |
438 | else | |
439 | strbuf_addstr(&ident, ident_default_date()); | |
440 | } | |
441 | ||
442 | return ident.buf; | |
443 | } | |
444 | ||
445 | const char *fmt_name(enum want_ident whose_ident) | |
446 | { | |
447 | char *name = NULL; | |
448 | char *email = NULL; | |
449 | ||
450 | switch (whose_ident) { | |
451 | case WANT_BLANK_IDENT: | |
452 | break; | |
453 | case WANT_AUTHOR_IDENT: | |
454 | name = getenv("GIT_AUTHOR_NAME"); | |
455 | email = getenv("GIT_AUTHOR_EMAIL"); | |
456 | break; | |
457 | case WANT_COMMITTER_IDENT: | |
458 | name = getenv("GIT_COMMITTER_NAME"); | |
459 | email = getenv("GIT_COMMITTER_EMAIL"); | |
460 | break; | |
461 | } | |
462 | return fmt_ident(name, email, whose_ident, NULL, | |
463 | IDENT_STRICT | IDENT_NO_DATE); | |
464 | } | |
465 | ||
466 | const char *git_author_info(int flag) | |
467 | { | |
468 | if (getenv("GIT_AUTHOR_NAME")) | |
469 | author_ident_explicitly_given |= IDENT_NAME_GIVEN; | |
470 | if (getenv("GIT_AUTHOR_EMAIL")) | |
471 | author_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
472 | return fmt_ident(getenv("GIT_AUTHOR_NAME"), | |
473 | getenv("GIT_AUTHOR_EMAIL"), | |
474 | WANT_AUTHOR_IDENT, | |
475 | getenv("GIT_AUTHOR_DATE"), | |
476 | flag); | |
477 | } | |
478 | ||
479 | const char *git_committer_info(int flag) | |
480 | { | |
481 | if (getenv("GIT_COMMITTER_NAME")) | |
482 | committer_ident_explicitly_given |= IDENT_NAME_GIVEN; | |
483 | if (getenv("GIT_COMMITTER_EMAIL")) | |
484 | committer_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
485 | return fmt_ident(getenv("GIT_COMMITTER_NAME"), | |
486 | getenv("GIT_COMMITTER_EMAIL"), | |
487 | WANT_COMMITTER_IDENT, | |
488 | getenv("GIT_COMMITTER_DATE"), | |
489 | flag); | |
490 | } | |
491 | ||
492 | static int ident_is_sufficient(int user_ident_explicitly_given) | |
493 | { | |
494 | #ifndef WINDOWS | |
495 | return (user_ident_explicitly_given & IDENT_MAIL_GIVEN); | |
496 | #else | |
497 | return (user_ident_explicitly_given == IDENT_ALL_GIVEN); | |
498 | #endif | |
499 | } | |
500 | ||
501 | int committer_ident_sufficiently_given(void) | |
502 | { | |
503 | return ident_is_sufficient(committer_ident_explicitly_given); | |
504 | } | |
505 | ||
506 | int author_ident_sufficiently_given(void) | |
507 | { | |
508 | return ident_is_sufficient(author_ident_explicitly_given); | |
509 | } | |
510 | ||
511 | static int set_ident(const char *var, const char *value) | |
512 | { | |
513 | if (!strcmp(var, "author.name")) { | |
514 | if (!value) | |
515 | return config_error_nonbool(var); | |
516 | strbuf_reset(&git_author_name); | |
517 | strbuf_addstr(&git_author_name, value); | |
518 | author_ident_explicitly_given |= IDENT_NAME_GIVEN; | |
519 | ident_config_given |= IDENT_NAME_GIVEN; | |
520 | return 0; | |
521 | } | |
522 | ||
523 | if (!strcmp(var, "author.email")) { | |
524 | if (!value) | |
525 | return config_error_nonbool(var); | |
526 | strbuf_reset(&git_author_email); | |
527 | strbuf_addstr(&git_author_email, value); | |
528 | author_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
529 | ident_config_given |= IDENT_MAIL_GIVEN; | |
530 | return 0; | |
531 | } | |
532 | ||
533 | if (!strcmp(var, "committer.name")) { | |
534 | if (!value) | |
535 | return config_error_nonbool(var); | |
536 | strbuf_reset(&git_committer_name); | |
537 | strbuf_addstr(&git_committer_name, value); | |
538 | committer_ident_explicitly_given |= IDENT_NAME_GIVEN; | |
539 | ident_config_given |= IDENT_NAME_GIVEN; | |
540 | return 0; | |
541 | } | |
542 | ||
543 | if (!strcmp(var, "committer.email")) { | |
544 | if (!value) | |
545 | return config_error_nonbool(var); | |
546 | strbuf_reset(&git_committer_email); | |
547 | strbuf_addstr(&git_committer_email, value); | |
548 | committer_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
549 | ident_config_given |= IDENT_MAIL_GIVEN; | |
550 | return 0; | |
551 | } | |
552 | ||
553 | if (!strcmp(var, "user.name")) { | |
554 | if (!value) | |
555 | return config_error_nonbool(var); | |
556 | strbuf_reset(&git_default_name); | |
557 | strbuf_addstr(&git_default_name, value); | |
558 | committer_ident_explicitly_given |= IDENT_NAME_GIVEN; | |
559 | author_ident_explicitly_given |= IDENT_NAME_GIVEN; | |
560 | ident_config_given |= IDENT_NAME_GIVEN; | |
561 | return 0; | |
562 | } | |
563 | ||
564 | if (!strcmp(var, "user.email")) { | |
565 | if (!value) | |
566 | return config_error_nonbool(var); | |
567 | strbuf_reset(&git_default_email); | |
568 | strbuf_addstr(&git_default_email, value); | |
569 | committer_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
570 | author_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
571 | ident_config_given |= IDENT_MAIL_GIVEN; | |
572 | return 0; | |
573 | } | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
578 | int git_ident_config(const char *var, const char *value, void *data) | |
579 | { | |
580 | if (!strcmp(var, "user.useconfigonly")) { | |
581 | ident_use_config_only = git_config_bool(var, value); | |
582 | return 0; | |
583 | } | |
584 | ||
585 | return set_ident(var, value); | |
586 | } | |
587 | ||
588 | static void set_env_if(const char *key, const char *value, int *given, int bit) | |
589 | { | |
590 | if ((*given & bit) || getenv(key)) | |
591 | return; /* nothing to do */ | |
592 | setenv(key, value, 0); | |
593 | *given |= bit; | |
594 | } | |
595 | ||
596 | void prepare_fallback_ident(const char *name, const char *email) | |
597 | { | |
598 | set_env_if("GIT_AUTHOR_NAME", name, | |
599 | &author_ident_explicitly_given, IDENT_NAME_GIVEN); | |
600 | set_env_if("GIT_AUTHOR_EMAIL", email, | |
601 | &author_ident_explicitly_given, IDENT_MAIL_GIVEN); | |
602 | set_env_if("GIT_COMMITTER_NAME", name, | |
603 | &committer_ident_explicitly_given, IDENT_NAME_GIVEN); | |
604 | set_env_if("GIT_COMMITTER_EMAIL", email, | |
605 | &committer_ident_explicitly_given, IDENT_MAIL_GIVEN); | |
606 | } | |
607 | ||
608 | static int buf_cmp(const char *a_begin, const char *a_end, | |
609 | const char *b_begin, const char *b_end) | |
610 | { | |
611 | int a_len = a_end - a_begin; | |
612 | int b_len = b_end - b_begin; | |
613 | int min = a_len < b_len ? a_len : b_len; | |
614 | int cmp; | |
615 | ||
616 | cmp = memcmp(a_begin, b_begin, min); | |
617 | if (cmp) | |
618 | return cmp; | |
619 | ||
620 | return a_len - b_len; | |
621 | } | |
622 | ||
623 | int ident_cmp(const struct ident_split *a, | |
624 | const struct ident_split *b) | |
625 | { | |
626 | int cmp; | |
627 | ||
628 | cmp = buf_cmp(a->mail_begin, a->mail_end, | |
629 | b->mail_begin, b->mail_end); | |
630 | if (cmp) | |
631 | return cmp; | |
632 | ||
633 | return buf_cmp(a->name_begin, a->name_end, | |
634 | b->name_begin, b->name_end); | |
635 | } |