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, size_t 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 size_t 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, size_t size, int offset, const char *str)
100 size_t 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, size_t 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"),