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 static void copy_gecos(const struct passwd
*w
, char *name
, int sz
)
17 nlen
= strlen(w
->pw_name
);
19 /* Traditionally GECOS field had office phone numbers etc, separated
20 * with commas. Also & stands for capitalized form of the login name.
23 for (len
= 0, dst
= name
, src
= w
->pw_gecos
; len
< sz
; src
++) {
27 if (ch
== 0 || ch
== ',')
32 if (len
+ nlen
< sz
) {
33 /* Sorry, Mr. McDonald... */
34 *dst
++ = toupper(*w
->pw_name
);
35 memcpy(dst
, w
->pw_name
+ 1, nlen
- 1);
42 die("Your parents must have hated you!");
46 static void copy_email(const struct passwd
*pw
)
49 * Make up a fake email address
50 * (name + '@' + hostname [+ '.' + domainname])
52 int len
= strlen(pw
->pw_name
);
53 if (len
> sizeof(git_default_email
)/2)
54 die("Your sysadmin must hate you!");
55 memcpy(git_default_email
, pw
->pw_name
, len
);
56 git_default_email
[len
++] = '@';
57 gethostname(git_default_email
+ len
, sizeof(git_default_email
) - len
);
58 if (!strchr(git_default_email
+len
, '.')) {
59 struct hostent
*he
= gethostbyname(git_default_email
+ len
);
62 len
= strlen(git_default_email
);
63 git_default_email
[len
++] = '.';
64 if (he
&& (domainname
= strchr(he
->h_name
, '.')))
65 strlcpy(git_default_email
+ len
, domainname
+ 1,
66 sizeof(git_default_email
) - len
);
68 strlcpy(git_default_email
+ len
, "(none)",
69 sizeof(git_default_email
) - len
);
73 static void setup_ident(void)
75 struct passwd
*pw
= NULL
;
77 /* Get the name ("gecos") */
78 if (!git_default_name
[0]) {
79 pw
= getpwuid(getuid());
81 die("You don't exist. Go away!");
82 copy_gecos(pw
, git_default_name
, sizeof(git_default_name
));
85 if (!git_default_email
[0]) {
87 pw
= getpwuid(getuid());
89 die("You don't exist. Go away!");
93 /* And set the default date */
94 if (!git_default_date
[0])
95 datestamp(git_default_date
, sizeof(git_default_date
));
98 static int add_raw(char *buf
, int size
, int offset
, const char *str
)
100 int len
= strlen(str
);
101 if (offset
+ len
> size
)
103 memcpy(buf
+ offset
, str
, len
);
107 static int crud(unsigned char c
)
109 static char crud_array
[256];
110 static int crud_array_initialized
= 0;
112 if (!crud_array_initialized
) {
115 for (k
= 0; k
<= 31; ++k
) crud_array
[k
] = 1;
124 crud_array
['\''] = 1;
125 crud_array_initialized
= 1;
127 return crud_array
[c
];
131 * Copy over a string to the destination, but avoid special
132 * characters ('\n', '<' and '>') and remove crud at the end
134 static int copy(char *buf
, int size
, int offset
, const char *src
)
139 /* Remove crud from the beginning.. */
140 while ((c
= *src
) != 0) {
146 /* Remove crud from the end.. */
156 * Copy the rest to the buffer, but avoid the special
157 * characters '\n' '<' and '>' that act as delimiters on
158 * a identification line
160 for (i
= 0; i
< len
; i
++) {
163 case '\n': case '<': case '>':
173 static const char au_env
[] = "GIT_AUTHOR_NAME";
174 static const char co_env
[] = "GIT_COMMITTER_NAME";
175 static const char *env_hint
=
177 "*** Your name cannot be determined from your system services (gecos).\n"
181 " git config user.email \"you@email.com\"\n"
182 " git config user.name \"Your Name\"\n"
184 "To set the identity in this repository.\n"
185 "Add --global to set your account\'s default\n"
188 const char *fmt_ident(const char *name
, const char *email
,
189 const char *date_str
, int error_on_no_name
)
191 static char buffer
[1000];
197 name
= git_default_name
;
199 email
= git_default_email
;
204 if (0 <= error_on_no_name
&&
205 name
== git_default_name
&& env_hint
) {
206 fprintf(stderr
, env_hint
, au_env
, co_env
);
207 env_hint
= NULL
; /* warn only once, for "git-var -l" */
209 if (0 < error_on_no_name
)
210 die("empty ident %s <%s> not allowed", name
, email
);
211 pw
= getpwuid(getuid());
213 die("You don't exist. Go away!");
214 strlcpy(git_default_name
, pw
->pw_name
,
215 sizeof(git_default_name
));
216 name
= git_default_name
;
219 strcpy(date
, git_default_date
);
221 parse_date(date_str
, date
, sizeof(date
));
223 i
= copy(buffer
, sizeof(buffer
), 0, name
);
224 i
= add_raw(buffer
, sizeof(buffer
), i
, " <");
225 i
= copy(buffer
, sizeof(buffer
), i
, email
);
226 i
= add_raw(buffer
, sizeof(buffer
), i
, "> ");
227 i
= copy(buffer
, sizeof(buffer
), i
, date
);
228 if (i
>= sizeof(buffer
))
229 die("Impossibly long personal identifier");
234 const char *git_author_info(int error_on_no_name
)
236 return fmt_ident(getenv("GIT_AUTHOR_NAME"),
237 getenv("GIT_AUTHOR_EMAIL"),
238 getenv("GIT_AUTHOR_DATE"),
242 const char *git_committer_info(int error_on_no_name
)
244 return fmt_ident(getenv("GIT_COMMITTER_NAME"),
245 getenv("GIT_COMMITTER_EMAIL"),
246 getenv("GIT_COMMITTER_DATE"),