t5704: fix nonportable sed/grep usages
[git/git.git] / ident.c
CommitLineData
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 10static 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 18static 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
8a55caa8
JN
53static int add_mailname_host(char *buf, size_t len)
54{
55 FILE *mailname;
56
57 mailname = fopen("/etc/mailname", "r");
58 if (!mailname) {
59 if (errno != ENOENT)
60 warning("cannot open /etc/mailname: %s",
61 strerror(errno));
62 return -1;
63 }
64 if (!fgets(buf, len, mailname)) {
65 if (ferror(mailname))
66 warning("cannot read /etc/mailname: %s",
67 strerror(errno));
68 fclose(mailname);
69 return -1;
70 }
71 /* success! */
72 fclose(mailname);
73 return 0;
74}
75
76static void add_domainname(char *buf, size_t len)
77{
78 struct hostent *he;
79 size_t namelen;
80 const char *domainname;
81
82 if (gethostname(buf, len)) {
83 warning("cannot get host name: %s", strerror(errno));
84 strlcpy(buf, "(none)", len);
85 return;
86 }
87 namelen = strlen(buf);
88 if (memchr(buf, '.', namelen))
89 return;
90
91 he = gethostbyname(buf);
92 buf[namelen++] = '.';
93 buf += namelen;
94 len -= namelen;
95 if (he && (domainname = strchr(he->h_name, '.')))
96 strlcpy(buf, domainname + 1, len);
97 else
98 strlcpy(buf, "(none)", len);
99}
100
0b952a98 101static void copy_email(const struct passwd *pw)
6aa33f40 102{
01754769
JH
103 /*
104 * Make up a fake email address
105 * (name + '@' + hostname [+ '.' + domainname])
106 */
b0732115 107 size_t len = strlen(pw->pw_name);
e1b10391 108 if (len > sizeof(git_default_email)/2)
7a868a84 109 die("Your sysadmin must hate you!");
e1b10391
LT
110 memcpy(git_default_email, pw->pw_name, len);
111 git_default_email[len++] = '@';
8a55caa8
JN
112
113 if (!add_mailname_host(git_default_email + len,
114 sizeof(git_default_email) - len))
115 return; /* read from "/etc/mailname" (Debian) */
116 add_domainname(git_default_email + len,
117 sizeof(git_default_email) - len);
01754769
JH
118}
119
d855e4d3 120static void setup_ident(const char **name, const char **emailp)
01754769
JH
121{
122 struct passwd *pw = NULL;
123
124 /* Get the name ("gecos") */
d855e4d3 125 if (!*name && !git_default_name[0]) {
01754769
JH
126 pw = getpwuid(getuid());
127 if (!pw)
128 die("You don't exist. Go away!");
129 copy_gecos(pw, git_default_name, sizeof(git_default_name));
130 }
d855e4d3
JN
131 if (!*name)
132 *name = git_default_name;
01754769 133
d855e4d3 134 if (!*emailp && !git_default_email[0]) {
46f74f00
MK
135 const char *email = getenv("EMAIL");
136
99178c83 137 if (email && email[0]) {
46f74f00
MK
138 strlcpy(git_default_email, email,
139 sizeof(git_default_email));
99178c83
JH
140 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
141 } else {
46f74f00
MK
142 if (!pw)
143 pw = getpwuid(getuid());
144 if (!pw)
145 die("You don't exist. Go away!");
146 copy_email(pw);
147 }
01754769 148 }
d855e4d3
JN
149 if (!*emailp)
150 *emailp = git_default_email;
01754769 151
6aa33f40 152 /* And set the default date */
01754769
JH
153 if (!git_default_date[0])
154 datestamp(git_default_date, sizeof(git_default_date));
6aa33f40
LT
155}
156
b0732115 157static int add_raw(char *buf, size_t size, int offset, const char *str)
6aa33f40 158{
b0732115 159 size_t len = strlen(str);
6aa33f40
LT
160 if (offset + len > size)
161 return size;
162 memcpy(buf + offset, str, len);
163 return offset + len;
164}
165
166static int crud(unsigned char c)
167{
f64c81d4
AR
168 return c <= 32 ||
169 c == '.' ||
170 c == ',' ||
171 c == ':' ||
172 c == ';' ||
173 c == '<' ||
174 c == '>' ||
175 c == '"' ||
d404bf02 176 c == '\\' ||
f64c81d4 177 c == '\'';
6aa33f40
LT
178}
179
180/*
181 * Copy over a string to the destination, but avoid special
182 * characters ('\n', '<' and '>') and remove crud at the end
183 */
b0732115 184static int copy(char *buf, size_t size, int offset, const char *src)
6aa33f40 185{
b0732115 186 size_t i, len;
6aa33f40
LT
187 unsigned char c;
188
189 /* Remove crud from the beginning.. */
190 while ((c = *src) != 0) {
191 if (!crud(c))
192 break;
193 src++;
194 }
195
196 /* Remove crud from the end.. */
197 len = strlen(src);
198 while (len > 0) {
199 c = src[len-1];
200 if (!crud(c))
201 break;
202 --len;
203 }
204
205 /*
206 * Copy the rest to the buffer, but avoid the special
82f9d58a 207 * characters '\n' '<' and '>' that act as delimiters on
790296fd 208 * an identification line
6aa33f40
LT
209 */
210 for (i = 0; i < len; i++) {
211 c = *src++;
212 switch (c) {
213 case '\n': case '<': case '>':
214 continue;
215 }
216 if (offset >= size)
217 return size;
218 buf[offset++] = c;
219 }
220 return offset;
221}
222
749be728 223static const char *env_hint =
d5cc2de9 224"\n"
6c293d40 225"*** Please tell me who you are.\n"
d5cc2de9
HWN
226"\n"
227"Run\n"
228"\n"
8e7425da 229" git config --global user.email \"you@example.com\"\n"
180787c4 230" git config --global user.name \"Your Name\"\n"
d5cc2de9 231"\n"
180787c4
SP
232"to set your account\'s default identity.\n"
233"Omit --global to set the identity only in this repository.\n"
d5cc2de9 234"\n";
749be728 235
774751a8
JH
236const char *fmt_ident(const char *name, const char *email,
237 const char *date_str, int flag)
6aa33f40
LT
238{
239 static char buffer[1000];
240 char date[50];
241 int i;
774751a8
JH
242 int error_on_no_name = (flag & IDENT_ERROR_ON_NO_NAME);
243 int warn_on_no_name = (flag & IDENT_WARN_ON_NO_NAME);
244 int name_addr_only = (flag & IDENT_NO_DATE);
6aa33f40 245
d855e4d3 246 setup_ident(&name, &email);
dfdd309e 247
749be728 248 if (!*name) {
cb280e10
JH
249 struct passwd *pw;
250
774751a8 251 if ((warn_on_no_name || error_on_no_name) &&
cb280e10 252 name == git_default_name && env_hint) {
8b770a2a 253 fputs(env_hint, stderr);
c27b3925 254 env_hint = NULL; /* warn only once */
749be728 255 }
774751a8 256 if (error_on_no_name)
749be728 257 die("empty ident %s <%s> not allowed", name, email);
cb280e10
JH
258 pw = getpwuid(getuid());
259 if (!pw)
260 die("You don't exist. Go away!");
261 strlcpy(git_default_name, pw->pw_name,
262 sizeof(git_default_name));
263 name = git_default_name;
749be728 264 }
dfdd309e 265
e1b10391 266 strcpy(date, git_default_date);
4579bb41
JK
267 if (!name_addr_only && date_str && date_str[0]) {
268 if (parse_date(date_str, date, sizeof(date)) < 0)
269 die("invalid date format: %s", date_str);
270 }
6aa33f40
LT
271
272 i = copy(buffer, sizeof(buffer), 0, name);
273 i = add_raw(buffer, sizeof(buffer), i, " <");
274 i = copy(buffer, sizeof(buffer), i, email);
d9ccfe77
JH
275 if (!name_addr_only) {
276 i = add_raw(buffer, sizeof(buffer), i, "> ");
277 i = copy(buffer, sizeof(buffer), i, date);
278 } else {
279 i = add_raw(buffer, sizeof(buffer), i, ">");
280 }
6aa33f40
LT
281 if (i >= sizeof(buffer))
282 die("Impossibly long personal identifier");
283 buffer[i] = 0;
284 return buffer;
285}
d289d136 286
d9ccfe77
JH
287const char *fmt_name(const char *name, const char *email)
288{
774751a8 289 return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE);
d9ccfe77
JH
290}
291
774751a8 292const char *git_author_info(int flag)
d289d136 293{
798123af 294 return fmt_ident(getenv("GIT_AUTHOR_NAME"),
c7d77dab 295 getenv("GIT_AUTHOR_EMAIL"),
749be728 296 getenv("GIT_AUTHOR_DATE"),
774751a8 297 flag);
d289d136
EB
298}
299
774751a8 300const char *git_committer_info(int flag)
d289d136 301{
91c38a21
JH
302 if (getenv("GIT_COMMITTER_NAME"))
303 user_ident_explicitly_given |= IDENT_NAME_GIVEN;
304 if (getenv("GIT_COMMITTER_EMAIL"))
305 user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
798123af 306 return fmt_ident(getenv("GIT_COMMITTER_NAME"),
c7d77dab 307 getenv("GIT_COMMITTER_EMAIL"),
749be728 308 getenv("GIT_COMMITTER_DATE"),
774751a8 309 flag);
d289d136 310}
5aeb3a3a
JH
311
312int user_ident_sufficiently_given(void)
313{
314#ifndef WINDOWS
315 return (user_ident_explicitly_given & IDENT_MAIL_GIVEN);
316#else
317 return (user_ident_explicitly_given == IDENT_ALL_GIVEN);
318#endif
319}