4 * create git identifier lines of the form "name <email> date"
6 * Copyright (C) 2005 Linus Torvalds
10 static char git_default_date
[50];
12 #ifdef NO_GECOS_IN_PWENT
13 #define get_gecos(ignored) "&"
15 #define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos)
18 static void copy_gecos(const struct passwd
*w
, char *name
, size_t sz
)
23 nlen
= strlen(w
->pw_name
);
25 /* Traditionally GECOS field had office phone numbers etc, separated
26 * with commas. Also & stands for capitalized form of the login name.
29 for (len
= 0, dst
= name
, src
= get_gecos(w
); len
< sz
; src
++) {
33 if (ch
== 0 || ch
== ',')
38 if (len
+ nlen
< sz
) {
39 /* Sorry, Mr. McDonald... */
40 *dst
++ = toupper(*w
->pw_name
);
41 memcpy(dst
, w
->pw_name
+ 1, nlen
- 1);
49 die("Your parents must have hated you!");
53 static int add_mailname_host(char *buf
, size_t len
)
57 mailname
= fopen("/etc/mailname", "r");
60 warning("cannot open /etc/mailname: %s",
64 if (!fgets(buf
, len
, mailname
)) {
66 warning("cannot read /etc/mailname: %s",
76 static void add_domainname(char *buf
, size_t len
)
80 const char *domainname
;
82 if (gethostname(buf
, len
)) {
83 warning("cannot get host name: %s", strerror(errno
));
84 strlcpy(buf
, "(none)", len
);
87 namelen
= strlen(buf
);
88 if (memchr(buf
, '.', namelen
))
91 he
= gethostbyname(buf
);
95 if (he
&& (domainname
= strchr(he
->h_name
, '.')))
96 strlcpy(buf
, domainname
+ 1, len
);
98 strlcpy(buf
, "(none)", len
);
101 static void copy_email(const struct passwd
*pw
)
104 * Make up a fake email address
105 * (name + '@' + hostname [+ '.' + domainname])
107 size_t len
= strlen(pw
->pw_name
);
108 if (len
> sizeof(git_default_email
)/2)
109 die("Your sysadmin must hate you!");
110 memcpy(git_default_email
, pw
->pw_name
, len
);
111 git_default_email
[len
++] = '@';
113 if (!add_mailname_host(git_default_email
+ len
,
114 sizeof(git_default_email
) - len
))
115 return; /* read from "/etc/mailname" (Debian) */
116 add_domainname(git_default_email
+ len
,
117 sizeof(git_default_email
) - len
);
120 const char *ident_default_name(void)
122 if (!git_default_name
[0]) {
123 struct passwd
*pw
= getpwuid(getuid());
125 die("You don't exist. Go away!");
126 copy_gecos(pw
, git_default_name
, sizeof(git_default_name
));
128 return git_default_name
;
131 const char *ident_default_email(void)
133 if (!git_default_email
[0]) {
134 const char *email
= getenv("EMAIL");
136 if (email
&& email
[0]) {
137 strlcpy(git_default_email
, email
,
138 sizeof(git_default_email
));
139 user_ident_explicitly_given
|= IDENT_MAIL_GIVEN
;
141 struct passwd
*pw
= getpwuid(getuid());
143 die("You don't exist. Go away!");
147 return git_default_email
;
150 const char *ident_default_date(void)
152 if (!git_default_date
[0])
153 datestamp(git_default_date
, sizeof(git_default_date
));
154 return git_default_date
;
157 static int add_raw(char *buf
, size_t size
, int offset
, const char *str
)
159 size_t len
= strlen(str
);
160 if (offset
+ len
> size
)
162 memcpy(buf
+ offset
, str
, len
);
166 static int crud(unsigned char c
)
181 * Copy over a string to the destination, but avoid special
182 * characters ('\n', '<' and '>') and remove crud at the end
184 static int copy(char *buf
, size_t size
, int offset
, const char *src
)
189 /* Remove crud from the beginning.. */
190 while ((c
= *src
) != 0) {
196 /* Remove crud from the end.. */
206 * Copy the rest to the buffer, but avoid the special
207 * characters '\n' '<' and '>' that act as delimiters on
208 * an identification line
210 for (i
= 0; i
< len
; i
++) {
213 case '\n': case '<': case '>':
224 * Reverse of fmt_ident(); given an ident line, split the fields
225 * to allow the caller to parse it.
226 * Signal a success by returning 0, but date/tz fields of the result
227 * can still be NULL if the input line only has the name/email part
228 * (e.g. reading from a reflog entry).
230 int split_ident_line(struct ident_split
*split
, const char *line
, int len
)
236 memset(split
, 0, sizeof(*split
));
238 split
->name_begin
= line
;
239 for (cp
= line
; *cp
&& cp
< line
+ len
; cp
++)
241 split
->mail_begin
= cp
+ 1;
244 if (!split
->mail_begin
)
247 for (cp
= split
->mail_begin
- 2; line
< cp
; cp
--)
249 split
->name_end
= cp
+ 1;
252 if (!split
->name_end
)
255 for (cp
= split
->mail_begin
; cp
< line
+ len
; cp
++)
257 split
->mail_end
= cp
;
260 if (!split
->mail_end
)
263 for (cp
= split
->mail_end
+ 1; cp
< line
+ len
&& isspace(*cp
); cp
++)
265 if (line
+ len
<= cp
)
267 split
->date_begin
= cp
;
268 span
= strspn(cp
, "0123456789");
271 split
->date_end
= split
->date_begin
+ span
;
272 for (cp
= split
->date_end
; cp
< line
+ len
&& isspace(*cp
); cp
++)
274 if (line
+ len
<= cp
|| (*cp
!= '+' && *cp
!= '-'))
276 split
->tz_begin
= cp
;
277 span
= strspn(cp
+ 1, "0123456789");
280 split
->tz_end
= split
->tz_begin
+ 1 + span
;
284 split
->date_begin
= NULL
;
285 split
->date_end
= NULL
;
286 split
->tz_begin
= NULL
;
287 split
->tz_end
= NULL
;
291 static const char *env_hint
=
293 "*** Please tell me who you are.\n"
297 " git config --global user.email \"you@example.com\"\n"
298 " git config --global user.name \"Your Name\"\n"
300 "to set your account\'s default identity.\n"
301 "Omit --global to set the identity only in this repository.\n"
304 const char *fmt_ident(const char *name
, const char *email
,
305 const char *date_str
, int flag
)
307 static char buffer
[1000];
310 int error_on_no_name
= (flag
& IDENT_ERROR_ON_NO_NAME
);
311 int warn_on_no_name
= (flag
& IDENT_WARN_ON_NO_NAME
);
312 int name_addr_only
= (flag
& IDENT_NO_DATE
);
315 name
= ident_default_name();
317 email
= ident_default_email();
322 if ((warn_on_no_name
|| error_on_no_name
) &&
323 name
== git_default_name
&& env_hint
) {
324 fputs(env_hint
, stderr
);
325 env_hint
= NULL
; /* warn only once */
327 if (error_on_no_name
)
328 die("empty ident %s <%s> not allowed", name
, email
);
329 pw
= getpwuid(getuid());
331 die("You don't exist. Go away!");
332 strlcpy(git_default_name
, pw
->pw_name
,
333 sizeof(git_default_name
));
334 name
= git_default_name
;
337 strcpy(date
, ident_default_date());
338 if (!name_addr_only
&& date_str
&& date_str
[0]) {
339 if (parse_date(date_str
, date
, sizeof(date
)) < 0)
340 die("invalid date format: %s", date_str
);
343 i
= copy(buffer
, sizeof(buffer
), 0, name
);
344 i
= add_raw(buffer
, sizeof(buffer
), i
, " <");
345 i
= copy(buffer
, sizeof(buffer
), i
, email
);
346 if (!name_addr_only
) {
347 i
= add_raw(buffer
, sizeof(buffer
), i
, "> ");
348 i
= copy(buffer
, sizeof(buffer
), i
, date
);
350 i
= add_raw(buffer
, sizeof(buffer
), i
, ">");
352 if (i
>= sizeof(buffer
))
353 die("Impossibly long personal identifier");
358 const char *fmt_name(const char *name
, const char *email
)
360 return fmt_ident(name
, email
, NULL
, IDENT_ERROR_ON_NO_NAME
| IDENT_NO_DATE
);
363 const char *git_author_info(int flag
)
365 return fmt_ident(getenv("GIT_AUTHOR_NAME"),
366 getenv("GIT_AUTHOR_EMAIL"),
367 getenv("GIT_AUTHOR_DATE"),
371 const char *git_committer_info(int flag
)
373 if (getenv("GIT_COMMITTER_NAME"))
374 user_ident_explicitly_given
|= IDENT_NAME_GIVEN
;
375 if (getenv("GIT_COMMITTER_EMAIL"))
376 user_ident_explicitly_given
|= IDENT_MAIL_GIVEN
;
377 return fmt_ident(getenv("GIT_COMMITTER_NAME"),
378 getenv("GIT_COMMITTER_EMAIL"),
379 getenv("GIT_COMMITTER_DATE"),
383 int user_ident_sufficiently_given(void)
386 return (user_ident_explicitly_given
& IDENT_MAIL_GIVEN
);
388 return (user_ident_explicitly_given
== IDENT_ALL_GIVEN
);