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Commit | Line | Data |
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6aa33f40 LT |
1 | /* |
2 | * ident.c | |
3 | * | |
4 | * create git identifier lines of the form "name <email> date" | |
5 | * | |
6 | * Copyright (C) 2005 Linus Torvalds | |
7 | */ | |
8 | #include "cache.h" | |
9 | ||
e1b10391 | 10 | static char git_default_date[50]; |
6aa33f40 | 11 | |
e9bacb4f JH |
12 | static void copy_gecos(struct passwd *w, char *name, int sz) |
13 | { | |
14 | char *src, *dst; | |
15 | int len, nlen; | |
16 | ||
17 | nlen = strlen(w->pw_name); | |
18 | ||
19 | /* Traditionally GECOS field had office phone numbers etc, separated | |
20 | * with commas. Also & stands for capitalized form of the login name. | |
21 | */ | |
22 | ||
23 | for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) { | |
24 | int ch = *src; | |
25 | if (ch != '&') { | |
26 | *dst++ = ch; | |
27 | if (ch == 0 || ch == ',') | |
28 | break; | |
29 | len++; | |
30 | continue; | |
31 | } | |
32 | if (len + nlen < sz) { | |
33 | /* Sorry, Mr. McDonald... */ | |
34 | *dst++ = toupper(*w->pw_name); | |
35 | memcpy(dst, w->pw_name + 1, nlen - 1); | |
36 | dst += nlen - 1; | |
37 | } | |
38 | } | |
39 | if (len < sz) | |
40 | name[len] = 0; | |
41 | else | |
42 | die("Your parents must have hated you!"); | |
43 | ||
44 | } | |
45 | ||
6aa33f40 LT |
46 | int setup_ident(void) |
47 | { | |
48 | int len; | |
49 | struct passwd *pw = getpwuid(getuid()); | |
50 | ||
51 | if (!pw) | |
52 | die("You don't exist. Go away!"); | |
53 | ||
54 | /* Get the name ("gecos") */ | |
e1b10391 | 55 | copy_gecos(pw, git_default_name, sizeof(git_default_name)); |
6aa33f40 LT |
56 | |
57 | /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */ | |
58 | len = strlen(pw->pw_name); | |
e1b10391 | 59 | if (len > sizeof(git_default_email)/2) |
7a868a84 | 60 | die("Your sysadmin must hate you!"); |
e1b10391 LT |
61 | memcpy(git_default_email, pw->pw_name, len); |
62 | git_default_email[len++] = '@'; | |
63 | gethostname(git_default_email + len, sizeof(git_default_email) - len); | |
64 | if (!strchr(git_default_email+len, '.')) { | |
adc3dbca PB |
65 | struct hostent *he = gethostbyname(git_default_email + len); |
66 | char *domainname; | |
67 | ||
e1b10391 LT |
68 | len = strlen(git_default_email); |
69 | git_default_email[len++] = '.'; | |
adc3dbca | 70 | if (he && (domainname = strchr(he->h_name, '.'))) |
817151e6 | 71 | strlcpy(git_default_email + len, domainname + 1, sizeof(git_default_email) - len); |
adc3dbca | 72 | else |
817151e6 | 73 | strlcpy(git_default_email + len, "(none)", sizeof(git_default_email) - len); |
6aa33f40 | 74 | } |
6aa33f40 | 75 | /* And set the default date */ |
e1b10391 | 76 | datestamp(git_default_date, sizeof(git_default_date)); |
6aa33f40 LT |
77 | return 0; |
78 | } | |
79 | ||
80 | static int add_raw(char *buf, int size, int offset, const char *str) | |
81 | { | |
82 | int len = strlen(str); | |
83 | if (offset + len > size) | |
84 | return size; | |
85 | memcpy(buf + offset, str, len); | |
86 | return offset + len; | |
87 | } | |
88 | ||
89 | static int crud(unsigned char c) | |
90 | { | |
fb2af037 JR |
91 | static char crud_array[256]; |
92 | static int crud_array_initialized = 0; | |
93 | ||
94 | if (!crud_array_initialized) { | |
95 | int k; | |
96 | ||
97 | for (k = 0; k <= 31; ++k) crud_array[k] = 1; | |
98 | crud_array[' '] = 1; | |
99 | crud_array['.'] = 1; | |
100 | crud_array[','] = 1; | |
101 | crud_array[':'] = 1; | |
102 | crud_array[';'] = 1; | |
103 | crud_array['<'] = 1; | |
104 | crud_array['>'] = 1; | |
105 | crud_array['"'] = 1; | |
106 | crud_array['\''] = 1; | |
107 | crud_array_initialized = 1; | |
108 | } | |
6aa33f40 LT |
109 | return crud_array[c]; |
110 | } | |
111 | ||
112 | /* | |
113 | * Copy over a string to the destination, but avoid special | |
114 | * characters ('\n', '<' and '>') and remove crud at the end | |
115 | */ | |
116 | static int copy(char *buf, int size, int offset, const char *src) | |
117 | { | |
118 | int i, len; | |
119 | unsigned char c; | |
120 | ||
121 | /* Remove crud from the beginning.. */ | |
122 | while ((c = *src) != 0) { | |
123 | if (!crud(c)) | |
124 | break; | |
125 | src++; | |
126 | } | |
127 | ||
128 | /* Remove crud from the end.. */ | |
129 | len = strlen(src); | |
130 | while (len > 0) { | |
131 | c = src[len-1]; | |
132 | if (!crud(c)) | |
133 | break; | |
134 | --len; | |
135 | } | |
136 | ||
137 | /* | |
138 | * Copy the rest to the buffer, but avoid the special | |
82f9d58a | 139 | * characters '\n' '<' and '>' that act as delimiters on |
6aa33f40 LT |
140 | * a identification line |
141 | */ | |
142 | for (i = 0; i < len; i++) { | |
143 | c = *src++; | |
144 | switch (c) { | |
145 | case '\n': case '<': case '>': | |
146 | continue; | |
147 | } | |
148 | if (offset >= size) | |
149 | return size; | |
150 | buf[offset++] = c; | |
151 | } | |
152 | return offset; | |
153 | } | |
154 | ||
749be728 JH |
155 | static const char au_env[] = "GIT_AUTHOR_NAME"; |
156 | static const char co_env[] = "GIT_COMMITTER_NAME"; | |
157 | static const char *env_hint = | |
d5cc2de9 | 158 | "\n" |
749be728 | 159 | "*** Your name cannot be determined from your system services (gecos).\n" |
d5cc2de9 HWN |
160 | "\n" |
161 | "Run\n" | |
162 | "\n" | |
163 | " git repo-config user.email \"you@email.com\"\n" | |
164 | " git repo-config user.name \"Your Name\"\n" | |
165 | "\n" | |
166 | "To set the identity in this repository.\n" | |
167 | "Add --global to set your account\'s default\n" | |
168 | "\n"; | |
749be728 | 169 | |
c7d77dab | 170 | static const char *get_ident(const char *name, const char *email, |
749be728 | 171 | const char *date_str, int error_on_no_name) |
6aa33f40 LT |
172 | { |
173 | static char buffer[1000]; | |
174 | char date[50]; | |
175 | int i; | |
176 | ||
177 | if (!name) | |
e1b10391 | 178 | name = git_default_name; |
6aa33f40 | 179 | if (!email) |
e1b10391 | 180 | email = git_default_email; |
dfdd309e | 181 | |
749be728 JH |
182 | if (!*name) { |
183 | if (name == git_default_name && env_hint) { | |
184 | fprintf(stderr, env_hint, au_env, co_env); | |
185 | env_hint = NULL; /* warn only once, for "git-var -l" */ | |
186 | } | |
187 | if (error_on_no_name) | |
188 | die("empty ident %s <%s> not allowed", name, email); | |
189 | } | |
dfdd309e | 190 | |
e1b10391 | 191 | strcpy(date, git_default_date); |
6aa33f40 LT |
192 | if (date_str) |
193 | parse_date(date_str, date, sizeof(date)); | |
194 | ||
195 | i = copy(buffer, sizeof(buffer), 0, name); | |
196 | i = add_raw(buffer, sizeof(buffer), i, " <"); | |
197 | i = copy(buffer, sizeof(buffer), i, email); | |
198 | i = add_raw(buffer, sizeof(buffer), i, "> "); | |
199 | i = copy(buffer, sizeof(buffer), i, date); | |
200 | if (i >= sizeof(buffer)) | |
201 | die("Impossibly long personal identifier"); | |
202 | buffer[i] = 0; | |
203 | return buffer; | |
204 | } | |
d289d136 | 205 | |
749be728 | 206 | const char *git_author_info(int error_on_no_name) |
d289d136 | 207 | { |
c7d77dab JH |
208 | return get_ident(getenv("GIT_AUTHOR_NAME"), |
209 | getenv("GIT_AUTHOR_EMAIL"), | |
749be728 JH |
210 | getenv("GIT_AUTHOR_DATE"), |
211 | error_on_no_name); | |
d289d136 EB |
212 | } |
213 | ||
749be728 | 214 | const char *git_committer_info(int error_on_no_name) |
d289d136 | 215 | { |
c7d77dab JH |
216 | return get_ident(getenv("GIT_COMMITTER_NAME"), |
217 | getenv("GIT_COMMITTER_EMAIL"), | |
749be728 JH |
218 | getenv("GIT_COMMITTER_DATE"), |
219 | error_on_no_name); | |
d289d136 | 220 | } |
a7f196a7 SP |
221 | |
222 | void ignore_missing_committer_name() | |
223 | { | |
224 | /* If we did not get a name from the user's gecos entry then | |
225 | * git_default_name is empty; so instead load the username | |
226 | * into it as a 'good enough for now' approximation of who | |
227 | * this user is. | |
228 | */ | |
229 | if (!*git_default_name) { | |
230 | struct passwd *pw = getpwuid(getuid()); | |
231 | if (!pw) | |
232 | die("You don't exist. Go away!"); | |
233 | strlcpy(git_default_name, pw->pw_name, sizeof(git_default_name)); | |
234 | } | |
235 | } |