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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 | ||
10 | #include <pwd.h> | |
6aa33f40 | 11 | |
e1b10391 | 12 | static char git_default_date[50]; |
6aa33f40 | 13 | |
e9bacb4f JH |
14 | static void copy_gecos(struct passwd *w, char *name, int sz) |
15 | { | |
16 | char *src, *dst; | |
17 | int len, nlen; | |
18 | ||
19 | nlen = strlen(w->pw_name); | |
20 | ||
21 | /* Traditionally GECOS field had office phone numbers etc, separated | |
22 | * with commas. Also & stands for capitalized form of the login name. | |
23 | */ | |
24 | ||
25 | for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) { | |
26 | int ch = *src; | |
27 | if (ch != '&') { | |
28 | *dst++ = ch; | |
29 | if (ch == 0 || ch == ',') | |
30 | break; | |
31 | len++; | |
32 | continue; | |
33 | } | |
34 | if (len + nlen < sz) { | |
35 | /* Sorry, Mr. McDonald... */ | |
36 | *dst++ = toupper(*w->pw_name); | |
37 | memcpy(dst, w->pw_name + 1, nlen - 1); | |
38 | dst += nlen - 1; | |
39 | } | |
40 | } | |
41 | if (len < sz) | |
42 | name[len] = 0; | |
43 | else | |
44 | die("Your parents must have hated you!"); | |
45 | ||
46 | } | |
47 | ||
6aa33f40 LT |
48 | int setup_ident(void) |
49 | { | |
50 | int len; | |
51 | struct passwd *pw = getpwuid(getuid()); | |
52 | ||
53 | if (!pw) | |
54 | die("You don't exist. Go away!"); | |
55 | ||
56 | /* Get the name ("gecos") */ | |
e1b10391 | 57 | copy_gecos(pw, git_default_name, sizeof(git_default_name)); |
6aa33f40 LT |
58 | |
59 | /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */ | |
60 | len = strlen(pw->pw_name); | |
e1b10391 | 61 | if (len > sizeof(git_default_email)/2) |
7a868a84 | 62 | die("Your sysadmin must hate you!"); |
e1b10391 LT |
63 | memcpy(git_default_email, pw->pw_name, len); |
64 | git_default_email[len++] = '@'; | |
65 | gethostname(git_default_email + len, sizeof(git_default_email) - len); | |
66 | if (!strchr(git_default_email+len, '.')) { | |
67 | len = strlen(git_default_email); | |
68 | git_default_email[len++] = '.'; | |
69 | getdomainname(git_default_email+len, sizeof(git_default_email)-len); | |
6aa33f40 | 70 | } |
6aa33f40 | 71 | /* And set the default date */ |
e1b10391 | 72 | datestamp(git_default_date, sizeof(git_default_date)); |
6aa33f40 LT |
73 | return 0; |
74 | } | |
75 | ||
76 | static int add_raw(char *buf, int size, int offset, const char *str) | |
77 | { | |
78 | int len = strlen(str); | |
79 | if (offset + len > size) | |
80 | return size; | |
81 | memcpy(buf + offset, str, len); | |
82 | return offset + len; | |
83 | } | |
84 | ||
85 | static int crud(unsigned char c) | |
86 | { | |
fb2af037 JR |
87 | static char crud_array[256]; |
88 | static int crud_array_initialized = 0; | |
89 | ||
90 | if (!crud_array_initialized) { | |
91 | int k; | |
92 | ||
93 | for (k = 0; k <= 31; ++k) crud_array[k] = 1; | |
94 | crud_array[' '] = 1; | |
95 | crud_array['.'] = 1; | |
96 | crud_array[','] = 1; | |
97 | crud_array[':'] = 1; | |
98 | crud_array[';'] = 1; | |
99 | crud_array['<'] = 1; | |
100 | crud_array['>'] = 1; | |
101 | crud_array['"'] = 1; | |
102 | crud_array['\''] = 1; | |
103 | crud_array_initialized = 1; | |
104 | } | |
6aa33f40 LT |
105 | return crud_array[c]; |
106 | } | |
107 | ||
108 | /* | |
109 | * Copy over a string to the destination, but avoid special | |
110 | * characters ('\n', '<' and '>') and remove crud at the end | |
111 | */ | |
112 | static int copy(char *buf, int size, int offset, const char *src) | |
113 | { | |
114 | int i, len; | |
115 | unsigned char c; | |
116 | ||
117 | /* Remove crud from the beginning.. */ | |
118 | while ((c = *src) != 0) { | |
119 | if (!crud(c)) | |
120 | break; | |
121 | src++; | |
122 | } | |
123 | ||
124 | /* Remove crud from the end.. */ | |
125 | len = strlen(src); | |
126 | while (len > 0) { | |
127 | c = src[len-1]; | |
128 | if (!crud(c)) | |
129 | break; | |
130 | --len; | |
131 | } | |
132 | ||
133 | /* | |
134 | * Copy the rest to the buffer, but avoid the special | |
135 | * characters '\n' '<' and '>' that act as delimeters on | |
136 | * a identification line | |
137 | */ | |
138 | for (i = 0; i < len; i++) { | |
139 | c = *src++; | |
140 | switch (c) { | |
141 | case '\n': case '<': case '>': | |
142 | continue; | |
143 | } | |
144 | if (offset >= size) | |
145 | return size; | |
146 | buf[offset++] = c; | |
147 | } | |
148 | return offset; | |
149 | } | |
150 | ||
151 | char *get_ident(const char *name, const char *email, const char *date_str) | |
152 | { | |
153 | static char buffer[1000]; | |
154 | char date[50]; | |
155 | int i; | |
156 | ||
157 | if (!name) | |
e1b10391 | 158 | name = git_default_name; |
6aa33f40 | 159 | if (!email) |
e1b10391 LT |
160 | email = git_default_email; |
161 | strcpy(date, git_default_date); | |
6aa33f40 LT |
162 | if (date_str) |
163 | parse_date(date_str, date, sizeof(date)); | |
164 | ||
165 | i = copy(buffer, sizeof(buffer), 0, name); | |
166 | i = add_raw(buffer, sizeof(buffer), i, " <"); | |
167 | i = copy(buffer, sizeof(buffer), i, email); | |
168 | i = add_raw(buffer, sizeof(buffer), i, "> "); | |
169 | i = copy(buffer, sizeof(buffer), i, date); | |
170 | if (i >= sizeof(buffer)) | |
171 | die("Impossibly long personal identifier"); | |
172 | buffer[i] = 0; | |
173 | return buffer; | |
174 | } | |
d289d136 EB |
175 | |
176 | char *git_author_info(void) | |
177 | { | |
a9ab586a | 178 | return get_ident(getenv("GIT_AUTHOR_NAME"), getenv("GIT_AUTHOR_EMAIL"), getenv("GIT_AUTHOR_DATE")); |
d289d136 EB |
179 | } |
180 | ||
181 | char *git_committer_info(void) | |
182 | { | |
a9ab586a | 183 | return get_ident(getenv("GIT_COMMITTER_NAME"), getenv("GIT_COMMITTER_EMAIL"), getenv("GIT_COMMITTER_DATE")); |
d289d136 | 184 | } |