]>
Commit | Line | Data |
---|---|---|
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 | ||
10 | #include <pwd.h> | |
adc3dbca | 11 | #include <netdb.h> |
6aa33f40 | 12 | |
e1b10391 | 13 | static char git_default_date[50]; |
6aa33f40 | 14 | |
e9bacb4f JH |
15 | static void copy_gecos(struct passwd *w, char *name, int sz) |
16 | { | |
17 | char *src, *dst; | |
18 | int len, nlen; | |
19 | ||
20 | nlen = strlen(w->pw_name); | |
21 | ||
22 | /* Traditionally GECOS field had office phone numbers etc, separated | |
23 | * with commas. Also & stands for capitalized form of the login name. | |
24 | */ | |
25 | ||
26 | for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) { | |
27 | int ch = *src; | |
28 | if (ch != '&') { | |
29 | *dst++ = ch; | |
30 | if (ch == 0 || ch == ',') | |
31 | break; | |
32 | len++; | |
33 | continue; | |
34 | } | |
35 | if (len + nlen < sz) { | |
36 | /* Sorry, Mr. McDonald... */ | |
37 | *dst++ = toupper(*w->pw_name); | |
38 | memcpy(dst, w->pw_name + 1, nlen - 1); | |
39 | dst += nlen - 1; | |
40 | } | |
41 | } | |
42 | if (len < sz) | |
43 | name[len] = 0; | |
44 | else | |
45 | die("Your parents must have hated you!"); | |
46 | ||
47 | } | |
48 | ||
6aa33f40 LT |
49 | int setup_ident(void) |
50 | { | |
51 | int len; | |
52 | struct passwd *pw = getpwuid(getuid()); | |
53 | ||
54 | if (!pw) | |
55 | die("You don't exist. Go away!"); | |
56 | ||
57 | /* Get the name ("gecos") */ | |
e1b10391 | 58 | copy_gecos(pw, git_default_name, sizeof(git_default_name)); |
6aa33f40 LT |
59 | |
60 | /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */ | |
61 | len = strlen(pw->pw_name); | |
e1b10391 | 62 | if (len > sizeof(git_default_email)/2) |
7a868a84 | 63 | die("Your sysadmin must hate you!"); |
e1b10391 LT |
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, '.')) { | |
adc3dbca PB |
68 | struct hostent *he = gethostbyname(git_default_email + len); |
69 | char *domainname; | |
70 | ||
e1b10391 LT |
71 | len = strlen(git_default_email); |
72 | git_default_email[len++] = '.'; | |
adc3dbca | 73 | if (he && (domainname = strchr(he->h_name, '.'))) |
817151e6 | 74 | strlcpy(git_default_email + len, domainname + 1, sizeof(git_default_email) - len); |
adc3dbca | 75 | else |
817151e6 | 76 | strlcpy(git_default_email + len, "(none)", sizeof(git_default_email) - len); |
6aa33f40 | 77 | } |
6aa33f40 | 78 | /* And set the default date */ |
e1b10391 | 79 | datestamp(git_default_date, sizeof(git_default_date)); |
6aa33f40 LT |
80 | return 0; |
81 | } | |
82 | ||
83 | static int add_raw(char *buf, int size, int offset, const char *str) | |
84 | { | |
85 | int len = strlen(str); | |
86 | if (offset + len > size) | |
87 | return size; | |
88 | memcpy(buf + offset, str, len); | |
89 | return offset + len; | |
90 | } | |
91 | ||
92 | static int crud(unsigned char c) | |
93 | { | |
fb2af037 JR |
94 | static char crud_array[256]; |
95 | static int crud_array_initialized = 0; | |
96 | ||
97 | if (!crud_array_initialized) { | |
98 | int k; | |
99 | ||
100 | for (k = 0; k <= 31; ++k) crud_array[k] = 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['>'] = 1; | |
108 | crud_array['"'] = 1; | |
109 | crud_array['\''] = 1; | |
110 | crud_array_initialized = 1; | |
111 | } | |
6aa33f40 LT |
112 | return crud_array[c]; |
113 | } | |
114 | ||
115 | /* | |
116 | * Copy over a string to the destination, but avoid special | |
117 | * characters ('\n', '<' and '>') and remove crud at the end | |
118 | */ | |
119 | static int copy(char *buf, int size, int offset, const char *src) | |
120 | { | |
121 | int i, len; | |
122 | unsigned char c; | |
123 | ||
124 | /* Remove crud from the beginning.. */ | |
125 | while ((c = *src) != 0) { | |
126 | if (!crud(c)) | |
127 | break; | |
128 | src++; | |
129 | } | |
130 | ||
131 | /* Remove crud from the end.. */ | |
132 | len = strlen(src); | |
133 | while (len > 0) { | |
134 | c = src[len-1]; | |
135 | if (!crud(c)) | |
136 | break; | |
137 | --len; | |
138 | } | |
139 | ||
140 | /* | |
141 | * Copy the rest to the buffer, but avoid the special | |
82f9d58a | 142 | * characters '\n' '<' and '>' that act as delimiters on |
6aa33f40 LT |
143 | * a identification line |
144 | */ | |
145 | for (i = 0; i < len; i++) { | |
146 | c = *src++; | |
147 | switch (c) { | |
148 | case '\n': case '<': case '>': | |
149 | continue; | |
150 | } | |
151 | if (offset >= size) | |
152 | return size; | |
153 | buf[offset++] = c; | |
154 | } | |
155 | return offset; | |
156 | } | |
157 | ||
749be728 JH |
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"; | |
167 | ||
c7d77dab | 168 | static const char *get_ident(const char *name, const char *email, |
749be728 | 169 | const char *date_str, int error_on_no_name) |
6aa33f40 LT |
170 | { |
171 | static char buffer[1000]; | |
172 | char date[50]; | |
173 | int i; | |
174 | ||
175 | if (!name) | |
e1b10391 | 176 | name = git_default_name; |
6aa33f40 | 177 | if (!email) |
e1b10391 | 178 | email = git_default_email; |
dfdd309e | 179 | |
749be728 JH |
180 | if (!*name) { |
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" */ | |
184 | } | |
185 | if (error_on_no_name) | |
186 | die("empty ident %s <%s> not allowed", name, email); | |
187 | } | |
dfdd309e | 188 | |
e1b10391 | 189 | strcpy(date, git_default_date); |
6aa33f40 LT |
190 | if (date_str) |
191 | parse_date(date_str, date, sizeof(date)); | |
192 | ||
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"); | |
200 | buffer[i] = 0; | |
201 | return buffer; | |
202 | } | |
d289d136 | 203 | |
749be728 | 204 | const char *git_author_info(int error_on_no_name) |
d289d136 | 205 | { |
c7d77dab JH |
206 | return get_ident(getenv("GIT_AUTHOR_NAME"), |
207 | getenv("GIT_AUTHOR_EMAIL"), | |
749be728 JH |
208 | getenv("GIT_AUTHOR_DATE"), |
209 | error_on_no_name); | |
d289d136 EB |
210 | } |
211 | ||
749be728 | 212 | const char *git_committer_info(int error_on_no_name) |
d289d136 | 213 | { |
c7d77dab JH |
214 | return get_ident(getenv("GIT_COMMITTER_NAME"), |
215 | getenv("GIT_COMMITTER_EMAIL"), | |
749be728 JH |
216 | getenv("GIT_COMMITTER_DATE"), |
217 | error_on_no_name); | |
d289d136 | 218 | } |