4 * create git identifier lines of the form "name <email> date"
6 * Copyright (C) 2005 Linus Torvalds
13 static char git_default_date[50];
15 static void copy_gecos(struct passwd *w, char *name, int sz)
20 nlen = strlen(w->pw_name);
22 /* Traditionally GECOS field had office phone numbers etc, separated
23 * with commas. Also & stands for capitalized form of the login name.
26 for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) {
30 if (ch == 0 || ch == ',')
35 if (len + nlen < sz) {
36 /* Sorry, Mr. McDonald... */
37 *dst++ = toupper(*w->pw_name);
38 memcpy(dst, w->pw_name + 1, nlen - 1);
45 die("Your parents must have hated you!");
52 struct passwd *pw = getpwuid(getuid());
55 die("You don't exist. Go away!");
57 /* Get the name ("gecos") */
58 copy_gecos(pw, git_default_name, sizeof(git_default_name));
60 /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */
61 len = strlen(pw->pw_name);
62 if (len > sizeof(git_default_email)/2)
63 die("Your sysadmin must hate you!");
64 memcpy(git_default_email, pw->pw_name, len);
65 git_default_email[len++] = '@';
66 gethostname(git_default_email + len, sizeof(git_default_email) - len);
67 if (!strchr(git_default_email+len, '.')) {
68 struct hostent *he = gethostbyname(git_default_email + len);
71 len = strlen(git_default_email);
72 git_default_email[len++] = '.';
73 if (he && (domainname = strchr(he->h_name, '.')))
74 strlcpy(git_default_email + len, domainname + 1, sizeof(git_default_email) - len);
76 strlcpy(git_default_email + len, "(none)", sizeof(git_default_email) - len);
78 /* And set the default date */
79 datestamp(git_default_date, sizeof(git_default_date));
83 static int add_raw(char *buf, int size, int offset, const char *str)
85 int len = strlen(str);
86 if (offset + len > size)
88 memcpy(buf + offset, str, len);
92 static int crud(unsigned char c)
94 static char crud_array[256];
95 static int crud_array_initialized = 0;
97 if (!crud_array_initialized) {
100 for (k = 0; k <= 31; ++k) crud_array[k] = 1;
109 crud_array['\''] = 1;
110 crud_array_initialized = 1;
112 return crud_array[c];
116 * Copy over a string to the destination, but avoid special
117 * characters ('\n', '<' and '>') and remove crud at the end
119 static int copy(char *buf, int size, int offset, const char *src)
124 /* Remove crud from the beginning.. */
125 while ((c = *src) != 0) {
131 /* Remove crud from the end.. */
141 * Copy the rest to the buffer, but avoid the special
142 * characters '\n' '<' and '>' that act as delimiters on
143 * a identification line
145 for (i = 0; i < len; i++) {
148 case '\n': case '<': case '>':
158 static const char au_env[] = "GIT_AUTHOR_NAME";
159 static const char co_env[] = "GIT_COMMITTER_NAME";
160 static const char *env_hint =
161 "\n*** Environment problem:\n"
162 "*** Your name cannot be determined from your system services (gecos).\n"
163 "*** You would need to set %s and %s\n"
164 "*** environment variables; otherwise you won't be able to perform\n"
165 "*** certain operations because of \"empty ident\" errors.\n"
166 "*** Alternatively, you can use user.name configuration variable.\n\n";
168 static const char *get_ident(const char *name, const char *email,
169 const char *date_str, int error_on_no_name)
171 static char buffer[1000];
176 name = git_default_name;
178 email = git_default_email;
181 if (name == git_default_name && env_hint) {
182 fprintf(stderr, env_hint, au_env, co_env);
183 env_hint = NULL; /* warn only once, for "git-var -l" */
185 if (error_on_no_name)
186 die("empty ident %s <%s> not allowed", name, email);
189 strcpy(date, git_default_date);
191 parse_date(date_str, date, sizeof(date));
193 i = copy(buffer, sizeof(buffer), 0, name);
194 i = add_raw(buffer, sizeof(buffer), i, " <");
195 i = copy(buffer, sizeof(buffer), i, email);
196 i = add_raw(buffer, sizeof(buffer), i, "> ");
197 i = copy(buffer, sizeof(buffer), i, date);
198 if (i >= sizeof(buffer))
199 die("Impossibly long personal identifier");
204 const char *git_author_info(int error_on_no_name)
206 return get_ident(getenv("GIT_AUTHOR_NAME"),
207 getenv("GIT_AUTHOR_EMAIL"),
208 getenv("GIT_AUTHOR_DATE"),
212 const char *git_committer_info(int error_on_no_name)
214 return get_ident(getenv("GIT_COMMITTER_NAME"),
215 getenv("GIT_COMMITTER_EMAIL"),
216 getenv("GIT_COMMITTER_DATE"),