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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 | |
590e081d RG |
12 | #ifdef NO_GECOS_IN_PWENT |
13 | #define get_gecos(ignored) "&" | |
14 | #else | |
15 | #define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos) | |
16 | #endif | |
17 | ||
b0732115 | 18 | static void copy_gecos(const struct passwd *w, char *name, size_t sz) |
e9bacb4f JH |
19 | { |
20 | char *src, *dst; | |
b0732115 | 21 | size_t len, nlen; |
e9bacb4f JH |
22 | |
23 | nlen = strlen(w->pw_name); | |
24 | ||
25 | /* Traditionally GECOS field had office phone numbers etc, separated | |
26 | * with commas. Also & stands for capitalized form of the login name. | |
27 | */ | |
28 | ||
590e081d | 29 | for (len = 0, dst = name, src = get_gecos(w); len < sz; src++) { |
e9bacb4f JH |
30 | int ch = *src; |
31 | if (ch != '&') { | |
32 | *dst++ = ch; | |
33 | if (ch == 0 || ch == ',') | |
34 | break; | |
35 | len++; | |
36 | continue; | |
37 | } | |
38 | if (len + nlen < sz) { | |
39 | /* Sorry, Mr. McDonald... */ | |
40 | *dst++ = toupper(*w->pw_name); | |
41 | memcpy(dst, w->pw_name + 1, nlen - 1); | |
42 | dst += nlen - 1; | |
c0336ff2 | 43 | len += nlen; |
e9bacb4f JH |
44 | } |
45 | } | |
46 | if (len < sz) | |
47 | name[len] = 0; | |
48 | else | |
49 | die("Your parents must have hated you!"); | |
50 | ||
51 | } | |
52 | ||
0b952a98 | 53 | static void copy_email(const struct passwd *pw) |
6aa33f40 | 54 | { |
01754769 JH |
55 | /* |
56 | * Make up a fake email address | |
57 | * (name + '@' + hostname [+ '.' + domainname]) | |
58 | */ | |
b0732115 | 59 | size_t len = strlen(pw->pw_name); |
e1b10391 | 60 | if (len > sizeof(git_default_email)/2) |
7a868a84 | 61 | die("Your sysadmin must hate you!"); |
e1b10391 LT |
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, '.')) { | |
adc3dbca PB |
66 | struct hostent *he = gethostbyname(git_default_email + len); |
67 | char *domainname; | |
68 | ||
e1b10391 LT |
69 | len = strlen(git_default_email); |
70 | git_default_email[len++] = '.'; | |
adc3dbca | 71 | if (he && (domainname = strchr(he->h_name, '.'))) |
01754769 JH |
72 | strlcpy(git_default_email + len, domainname + 1, |
73 | sizeof(git_default_email) - len); | |
adc3dbca | 74 | else |
01754769 JH |
75 | strlcpy(git_default_email + len, "(none)", |
76 | sizeof(git_default_email) - len); | |
6aa33f40 | 77 | } |
01754769 JH |
78 | } |
79 | ||
80 | static void setup_ident(void) | |
81 | { | |
82 | struct passwd *pw = NULL; | |
83 | ||
84 | /* Get the name ("gecos") */ | |
85 | if (!git_default_name[0]) { | |
86 | pw = getpwuid(getuid()); | |
87 | if (!pw) | |
88 | die("You don't exist. Go away!"); | |
89 | copy_gecos(pw, git_default_name, sizeof(git_default_name)); | |
90 | } | |
91 | ||
92 | if (!git_default_email[0]) { | |
46f74f00 MK |
93 | const char *email = getenv("EMAIL"); |
94 | ||
99178c83 | 95 | if (email && email[0]) { |
46f74f00 MK |
96 | strlcpy(git_default_email, email, |
97 | sizeof(git_default_email)); | |
99178c83 JH |
98 | user_ident_explicitly_given |= IDENT_MAIL_GIVEN; |
99 | } else { | |
46f74f00 MK |
100 | if (!pw) |
101 | pw = getpwuid(getuid()); | |
102 | if (!pw) | |
103 | die("You don't exist. Go away!"); | |
104 | copy_email(pw); | |
105 | } | |
01754769 JH |
106 | } |
107 | ||
6aa33f40 | 108 | /* And set the default date */ |
01754769 JH |
109 | if (!git_default_date[0]) |
110 | datestamp(git_default_date, sizeof(git_default_date)); | |
6aa33f40 LT |
111 | } |
112 | ||
b0732115 | 113 | static int add_raw(char *buf, size_t size, int offset, const char *str) |
6aa33f40 | 114 | { |
b0732115 | 115 | size_t len = strlen(str); |
6aa33f40 LT |
116 | if (offset + len > size) |
117 | return size; | |
118 | memcpy(buf + offset, str, len); | |
119 | return offset + len; | |
120 | } | |
121 | ||
122 | static int crud(unsigned char c) | |
123 | { | |
f64c81d4 AR |
124 | return c <= 32 || |
125 | c == '.' || | |
126 | c == ',' || | |
127 | c == ':' || | |
128 | c == ';' || | |
129 | c == '<' || | |
130 | c == '>' || | |
131 | c == '"' || | |
d404bf02 | 132 | c == '\\' || |
f64c81d4 | 133 | c == '\''; |
6aa33f40 LT |
134 | } |
135 | ||
136 | /* | |
137 | * Copy over a string to the destination, but avoid special | |
138 | * characters ('\n', '<' and '>') and remove crud at the end | |
139 | */ | |
b0732115 | 140 | static int copy(char *buf, size_t size, int offset, const char *src) |
6aa33f40 | 141 | { |
b0732115 | 142 | size_t i, len; |
6aa33f40 LT |
143 | unsigned char c; |
144 | ||
145 | /* Remove crud from the beginning.. */ | |
146 | while ((c = *src) != 0) { | |
147 | if (!crud(c)) | |
148 | break; | |
149 | src++; | |
150 | } | |
151 | ||
152 | /* Remove crud from the end.. */ | |
153 | len = strlen(src); | |
154 | while (len > 0) { | |
155 | c = src[len-1]; | |
156 | if (!crud(c)) | |
157 | break; | |
158 | --len; | |
159 | } | |
160 | ||
161 | /* | |
162 | * Copy the rest to the buffer, but avoid the special | |
82f9d58a | 163 | * characters '\n' '<' and '>' that act as delimiters on |
790296fd | 164 | * an identification line |
6aa33f40 LT |
165 | */ |
166 | for (i = 0; i < len; i++) { | |
167 | c = *src++; | |
168 | switch (c) { | |
169 | case '\n': case '<': case '>': | |
170 | continue; | |
171 | } | |
172 | if (offset >= size) | |
173 | return size; | |
174 | buf[offset++] = c; | |
175 | } | |
176 | return offset; | |
177 | } | |
178 | ||
749be728 | 179 | static const char *env_hint = |
d5cc2de9 | 180 | "\n" |
6c293d40 | 181 | "*** Please tell me who you are.\n" |
d5cc2de9 HWN |
182 | "\n" |
183 | "Run\n" | |
184 | "\n" | |
8e7425da | 185 | " git config --global user.email \"you@example.com\"\n" |
180787c4 | 186 | " git config --global user.name \"Your Name\"\n" |
d5cc2de9 | 187 | "\n" |
180787c4 SP |
188 | "to set your account\'s default identity.\n" |
189 | "Omit --global to set the identity only in this repository.\n" | |
d5cc2de9 | 190 | "\n"; |
749be728 | 191 | |
774751a8 JH |
192 | const char *fmt_ident(const char *name, const char *email, |
193 | const char *date_str, int flag) | |
6aa33f40 LT |
194 | { |
195 | static char buffer[1000]; | |
196 | char date[50]; | |
197 | int i; | |
774751a8 JH |
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); | |
6aa33f40 | 201 | |
01754769 | 202 | setup_ident(); |
6aa33f40 | 203 | if (!name) |
e1b10391 | 204 | name = git_default_name; |
6aa33f40 | 205 | if (!email) |
e1b10391 | 206 | email = git_default_email; |
dfdd309e | 207 | |
749be728 | 208 | if (!*name) { |
cb280e10 JH |
209 | struct passwd *pw; |
210 | ||
774751a8 | 211 | if ((warn_on_no_name || error_on_no_name) && |
cb280e10 | 212 | name == git_default_name && env_hint) { |
8b770a2a | 213 | fputs(env_hint, stderr); |
c27b3925 | 214 | env_hint = NULL; /* warn only once */ |
749be728 | 215 | } |
774751a8 | 216 | if (error_on_no_name) |
749be728 | 217 | die("empty ident %s <%s> not allowed", name, email); |
cb280e10 JH |
218 | pw = getpwuid(getuid()); |
219 | if (!pw) | |
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; | |
749be728 | 224 | } |
dfdd309e | 225 | |
e1b10391 | 226 | strcpy(date, git_default_date); |
4579bb41 JK |
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); | |
230 | } | |
6aa33f40 LT |
231 | |
232 | i = copy(buffer, sizeof(buffer), 0, name); | |
233 | i = add_raw(buffer, sizeof(buffer), i, " <"); | |
234 | i = copy(buffer, sizeof(buffer), i, email); | |
d9ccfe77 JH |
235 | if (!name_addr_only) { |
236 | i = add_raw(buffer, sizeof(buffer), i, "> "); | |
237 | i = copy(buffer, sizeof(buffer), i, date); | |
238 | } else { | |
239 | i = add_raw(buffer, sizeof(buffer), i, ">"); | |
240 | } | |
6aa33f40 LT |
241 | if (i >= sizeof(buffer)) |
242 | die("Impossibly long personal identifier"); | |
243 | buffer[i] = 0; | |
244 | return buffer; | |
245 | } | |
d289d136 | 246 | |
d9ccfe77 JH |
247 | const char *fmt_name(const char *name, const char *email) |
248 | { | |
774751a8 | 249 | return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE); |
d9ccfe77 JH |
250 | } |
251 | ||
774751a8 | 252 | const char *git_author_info(int flag) |
d289d136 | 253 | { |
798123af | 254 | return fmt_ident(getenv("GIT_AUTHOR_NAME"), |
c7d77dab | 255 | getenv("GIT_AUTHOR_EMAIL"), |
749be728 | 256 | getenv("GIT_AUTHOR_DATE"), |
774751a8 | 257 | flag); |
d289d136 EB |
258 | } |
259 | ||
774751a8 | 260 | const char *git_committer_info(int flag) |
d289d136 | 261 | { |
91c38a21 JH |
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; | |
798123af | 266 | return fmt_ident(getenv("GIT_COMMITTER_NAME"), |
c7d77dab | 267 | getenv("GIT_COMMITTER_EMAIL"), |
749be728 | 268 | getenv("GIT_COMMITTER_DATE"), |
774751a8 | 269 | flag); |
d289d136 | 270 | } |
5aeb3a3a JH |
271 | |
272 | int user_ident_sufficiently_given(void) | |
273 | { | |
274 | #ifndef WINDOWS | |
275 | return (user_ident_explicitly_given & IDENT_MAIL_GIVEN); | |
276 | #else | |
277 | return (user_ident_explicitly_given == IDENT_ALL_GIVEN); | |
278 | #endif | |
279 | } |