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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> | |
11 | #include <time.h> | |
12 | #include <ctype.h> | |
13 | ||
14 | static char real_email[1000]; | |
15 | static char real_name[1000]; | |
16 | static char real_date[50]; | |
17 | ||
e9bacb4f JH |
18 | static void copy_gecos(struct passwd *w, char *name, int sz) |
19 | { | |
20 | char *src, *dst; | |
21 | int 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 = w->pw_gecos; 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 | } | |
44 | } | |
45 | if (len < sz) | |
46 | name[len] = 0; | |
47 | else | |
48 | die("Your parents must have hated you!"); | |
49 | ||
50 | } | |
51 | ||
6aa33f40 LT |
52 | int setup_ident(void) |
53 | { | |
54 | int len; | |
55 | struct passwd *pw = getpwuid(getuid()); | |
56 | ||
57 | if (!pw) | |
58 | die("You don't exist. Go away!"); | |
59 | ||
60 | /* Get the name ("gecos") */ | |
e9bacb4f | 61 | copy_gecos(pw, real_name, sizeof(real_name)); |
6aa33f40 LT |
62 | |
63 | /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */ | |
64 | len = strlen(pw->pw_name); | |
65 | if (len > sizeof(real_email)/2) | |
7a868a84 | 66 | die("Your sysadmin must hate you!"); |
6aa33f40 LT |
67 | memcpy(real_email, pw->pw_name, len); |
68 | real_email[len++] = '@'; | |
69 | gethostname(real_email + len, sizeof(real_email) - len); | |
70 | if (!strchr(real_email+len, '.')) { | |
71 | len = strlen(real_email); | |
72 | real_email[len++] = '.'; | |
73 | getdomainname(real_email+len, sizeof(real_email)-len); | |
74 | } | |
6aa33f40 LT |
75 | /* And set the default date */ |
76 | datestamp(real_date, sizeof(real_date)); | |
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 | |
139 | * characters '\n' '<' and '>' that act as delimeters on | |
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 | ||
155 | char *get_ident(const char *name, const char *email, const char *date_str) | |
156 | { | |
157 | static char buffer[1000]; | |
158 | char date[50]; | |
159 | int i; | |
160 | ||
161 | if (!name) | |
162 | name = real_name; | |
163 | if (!email) | |
164 | email = real_email; | |
165 | strcpy(date, real_date); | |
166 | if (date_str) | |
167 | parse_date(date_str, date, sizeof(date)); | |
168 | ||
169 | i = copy(buffer, sizeof(buffer), 0, name); | |
170 | i = add_raw(buffer, sizeof(buffer), i, " <"); | |
171 | i = copy(buffer, sizeof(buffer), i, email); | |
172 | i = add_raw(buffer, sizeof(buffer), i, "> "); | |
173 | i = copy(buffer, sizeof(buffer), i, date); | |
174 | if (i >= sizeof(buffer)) | |
175 | die("Impossibly long personal identifier"); | |
176 | buffer[i] = 0; | |
177 | return buffer; | |
178 | } | |
d289d136 EB |
179 | |
180 | char *git_author_info(void) | |
181 | { | |
a9ab586a | 182 | return get_ident(getenv("GIT_AUTHOR_NAME"), getenv("GIT_AUTHOR_EMAIL"), getenv("GIT_AUTHOR_DATE")); |
d289d136 EB |
183 | } |
184 | ||
185 | char *git_committer_info(void) | |
186 | { | |
a9ab586a | 187 | return get_ident(getenv("GIT_COMMITTER_NAME"), getenv("GIT_COMMITTER_EMAIL"), getenv("GIT_COMMITTER_DATE")); |
d289d136 | 188 | } |