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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 | ||
10 | static char git_default_date[50]; | |
11 | ||
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 | ||
18 | static void copy_gecos(const struct passwd *w, char *name, size_t sz) | |
19 | { | |
20 | char *src, *dst; | |
21 | size_t len, nlen; | |
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 | ||
29 | for (len = 0, dst = name, src = get_gecos(w); len < sz; src++) { | |
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; | |
43 | len += nlen; | |
44 | } | |
45 | } | |
46 | if (len < sz) | |
47 | name[len] = 0; | |
48 | else | |
49 | die("Your parents must have hated you!"); | |
50 | ||
51 | } | |
52 | ||
53 | static void copy_email(const struct passwd *pw) | |
54 | { | |
55 | /* | |
56 | * Make up a fake email address | |
57 | * (name + '@' + hostname [+ '.' + domainname]) | |
58 | */ | |
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); | |
67 | char *domainname; | |
68 | ||
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); | |
74 | else | |
75 | strlcpy(git_default_email + len, "(none)", | |
76 | sizeof(git_default_email) - len); | |
77 | } | |
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]) { | |
93 | const char *email = getenv("EMAIL"); | |
94 | ||
95 | if (email && email[0]) { | |
96 | strlcpy(git_default_email, email, | |
97 | sizeof(git_default_email)); | |
98 | user_ident_explicitly_given |= IDENT_MAIL_GIVEN; | |
99 | } else { | |
100 | if (!pw) | |
101 | pw = getpwuid(getuid()); | |
102 | if (!pw) | |
103 | die("You don't exist. Go away!"); | |
104 | copy_email(pw); | |
105 | } | |
106 | } | |
107 | ||
108 | /* And set the default date */ | |
109 | if (!git_default_date[0]) | |
110 | datestamp(git_default_date, sizeof(git_default_date)); | |
111 | } | |
112 | ||
113 | static int add_raw(char *buf, size_t size, int offset, const char *str) | |
114 | { | |
115 | size_t len = strlen(str); | |
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 | { | |
124 | return c <= 32 || | |
125 | c == '.' || | |
126 | c == ',' || | |
127 | c == ':' || | |
128 | c == ';' || | |
129 | c == '<' || | |
130 | c == '>' || | |
131 | c == '"' || | |
132 | c == '\\' || | |
133 | c == '\''; | |
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 | */ | |
140 | static int copy(char *buf, size_t size, int offset, const char *src) | |
141 | { | |
142 | size_t i, len; | |
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 | |
163 | * characters '\n' '<' and '>' that act as delimiters on | |
164 | * an identification line | |
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 | ||
179 | static const char *env_hint = | |
180 | "\n" | |
181 | "*** Please tell me who you are.\n" | |
182 | "\n" | |
183 | "Run\n" | |
184 | "\n" | |
185 | " git config --global user.email \"you@example.com\"\n" | |
186 | " git config --global user.name \"Your Name\"\n" | |
187 | "\n" | |
188 | "to set your account\'s default identity.\n" | |
189 | "Omit --global to set the identity only in this repository.\n" | |
190 | "\n"; | |
191 | ||
192 | const char *fmt_ident(const char *name, const char *email, | |
193 | const char *date_str, int flag) | |
194 | { | |
195 | static char buffer[1000]; | |
196 | char date[50]; | |
197 | int i; | |
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); | |
201 | ||
202 | setup_ident(); | |
203 | if (!name) | |
204 | name = git_default_name; | |
205 | if (!email) | |
206 | email = git_default_email; | |
207 | ||
208 | if (!*name) { | |
209 | struct passwd *pw; | |
210 | ||
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 */ | |
215 | } | |
216 | if (error_on_no_name) | |
217 | die("empty ident %s <%s> not allowed", name, email); | |
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; | |
224 | } | |
225 | ||
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); | |
230 | } | |
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); | |
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 | } | |
241 | if (i >= sizeof(buffer)) | |
242 | die("Impossibly long personal identifier"); | |
243 | buffer[i] = 0; | |
244 | return buffer; | |
245 | } | |
246 | ||
247 | const char *fmt_name(const char *name, const char *email) | |
248 | { | |
249 | return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE); | |
250 | } | |
251 | ||
252 | const char *git_author_info(int flag) | |
253 | { | |
254 | return fmt_ident(getenv("GIT_AUTHOR_NAME"), | |
255 | getenv("GIT_AUTHOR_EMAIL"), | |
256 | getenv("GIT_AUTHOR_DATE"), | |
257 | flag); | |
258 | } | |
259 | ||
260 | const char *git_committer_info(int flag) | |
261 | { | |
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"), | |
269 | flag); | |
270 | } | |
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 | } |