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 void copy_email(const struct passwd *pw)
56 * Make up a fake email address
57 * (name + '@' + hostname [+ '.' + domainname])
59 size_t len = strlen(pw->pw_name);
60 if (len > sizeof(git_default_email)/2)
61 die("Your sysadmin must hate you!");
62 memcpy(git_default_email, pw->pw_name, len);
63 git_default_email[len++] = '@';
64 gethostname(git_default_email + len, sizeof(git_default_email) - len);
65 if (!strchr(git_default_email+len, '.')) {
66 struct hostent *he = gethostbyname(git_default_email + len);
69 len = strlen(git_default_email);
70 git_default_email[len++] = '.';
71 if (he && (domainname = strchr(he->h_name, '.')))
72 strlcpy(git_default_email + len, domainname + 1,
73 sizeof(git_default_email) - len);
75 strlcpy(git_default_email + len, "(none)",
76 sizeof(git_default_email) - len);
80 static void setup_ident(void)
82 struct passwd *pw = NULL;
84 /* Get the name ("gecos") */
85 if (!git_default_name[0]) {
86 pw = getpwuid(getuid());
88 die("You don't exist. Go away!");
89 copy_gecos(pw, git_default_name, sizeof(git_default_name));
92 if (!git_default_email[0]) {
93 const char *email = getenv("EMAIL");
95 if (email && email[0]) {
96 strlcpy(git_default_email, email,
97 sizeof(git_default_email));
98 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
101 pw = getpwuid(getuid());
103 die("You don't exist. Go away!");
108 /* And set the default date */
109 if (!git_default_date[0])
110 datestamp(git_default_date, sizeof(git_default_date));
113 static int add_raw(char *buf, size_t size, int offset, const char *str)
115 size_t len = strlen(str);
116 if (offset + len > size)
118 memcpy(buf + offset, str, len);
122 static int crud(unsigned char c)
137 * Copy over a string to the destination, but avoid special
138 * characters ('\n', '<' and '>') and remove crud at the end
140 static int copy(char *buf, size_t size, int offset, const char *src)
145 /* Remove crud from the beginning.. */
146 while ((c = *src) != 0) {
152 /* Remove crud from the end.. */
162 * Copy the rest to the buffer, but avoid the special
163 * characters '\n' '<' and '>' that act as delimiters on
164 * an identification line
166 for (i = 0; i < len; i++) {
169 case '\n': case '<': case '>':
179 static const char *env_hint =
181 "*** Please tell me who you are.\n"
185 " git config --global user.email \"you@example.com\"\n"
186 " git config --global user.name \"Your Name\"\n"
188 "to set your account\'s default identity.\n"
189 "Omit --global to set the identity only in this repository.\n"
192 const char *fmt_ident(const char *name, const char *email,
193 const char *date_str, int flag)
195 static char buffer[1000];
198 int error_on_no_name = (flag & IDENT_ERROR_ON_NO_NAME);
199 int warn_on_no_name = (flag & IDENT_WARN_ON_NO_NAME);
200 int name_addr_only = (flag & IDENT_NO_DATE);
204 name = git_default_name;
206 email = git_default_email;
211 if ((warn_on_no_name || error_on_no_name) &&
212 name == git_default_name && env_hint) {
213 fputs(env_hint, stderr);
214 env_hint = NULL; /* warn only once */
216 if (error_on_no_name)
217 die("empty ident %s <%s> not allowed", name, email);
218 pw = getpwuid(getuid());
220 die("You don't exist. Go away!");
221 strlcpy(git_default_name, pw->pw_name,
222 sizeof(git_default_name));
223 name = git_default_name;
226 strcpy(date, git_default_date);
227 if (!name_addr_only && date_str && date_str[0]) {
228 if (parse_date(date_str, date, sizeof(date)) < 0)
229 die("invalid date format: %s", date_str);
232 i = copy(buffer, sizeof(buffer), 0, name);
233 i = add_raw(buffer, sizeof(buffer), i, " <");
234 i = copy(buffer, sizeof(buffer), i, email);
235 if (!name_addr_only) {
236 i = add_raw(buffer, sizeof(buffer), i, "> ");
237 i = copy(buffer, sizeof(buffer), i, date);
239 i = add_raw(buffer, sizeof(buffer), i, ">");
241 if (i >= sizeof(buffer))
242 die("Impossibly long personal identifier");
247 const char *fmt_name(const char *name, const char *email)
249 return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE);
252 const char *git_author_info(int flag)
254 return fmt_ident(getenv("GIT_AUTHOR_NAME"),
255 getenv("GIT_AUTHOR_EMAIL"),
256 getenv("GIT_AUTHOR_DATE"),
260 const char *git_committer_info(int flag)
262 if (getenv("GIT_COMMITTER_NAME"))
263 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
264 if (getenv("GIT_COMMITTER_EMAIL"))
265 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
266 return fmt_ident(getenv("GIT_COMMITTER_NAME"),
267 getenv("GIT_COMMITTER_EMAIL"),
268 getenv("GIT_COMMITTER_DATE"),
272 int user_ident_sufficiently_given(void)
275 return (user_ident_explicitly_given & IDENT_MAIL_GIVEN);
277 return (user_ident_explicitly_given == IDENT_ALL_GIVEN);