git/ident.c
Petr Baudis adc3dbca1a Use sensible domain name (the DNS one) when guessing ident information
Currently, the code would use getdomainname() call, which however returns
something usually unset and not necessarily related at all to the DNS
domain name (it seems to be mostly some scary NIS/YP thing).

This patch changes the code to actually use the DNS domain name, which is
also what tends to be used in emails, and we aim at emails with our ident
code.

Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2005-10-20 22:32:07 -07:00

193 lines
4.3 KiB
C

/*
* ident.c
*
* create git identifier lines of the form "name <email> date"
*
* Copyright (C) 2005 Linus Torvalds
*/
#include "cache.h"
#include <pwd.h>
#include <netdb.h>
static char git_default_date[50];
static void copy_gecos(struct passwd *w, char *name, int sz)
{
char *src, *dst;
int len, nlen;
nlen = strlen(w->pw_name);
/* Traditionally GECOS field had office phone numbers etc, separated
* with commas. Also & stands for capitalized form of the login name.
*/
for (len = 0, dst = name, src = w->pw_gecos; len < sz; src++) {
int ch = *src;
if (ch != '&') {
*dst++ = ch;
if (ch == 0 || ch == ',')
break;
len++;
continue;
}
if (len + nlen < sz) {
/* Sorry, Mr. McDonald... */
*dst++ = toupper(*w->pw_name);
memcpy(dst, w->pw_name + 1, nlen - 1);
dst += nlen - 1;
}
}
if (len < sz)
name[len] = 0;
else
die("Your parents must have hated you!");
}
int setup_ident(void)
{
int len;
struct passwd *pw = getpwuid(getuid());
if (!pw)
die("You don't exist. Go away!");
/* Get the name ("gecos") */
copy_gecos(pw, git_default_name, sizeof(git_default_name));
/* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */
len = strlen(pw->pw_name);
if (len > sizeof(git_default_email)/2)
die("Your sysadmin must hate you!");
memcpy(git_default_email, pw->pw_name, len);
git_default_email[len++] = '@';
gethostname(git_default_email + len, sizeof(git_default_email) - len);
if (!strchr(git_default_email+len, '.')) {
struct hostent *he = gethostbyname(git_default_email + len);
char *domainname;
len = strlen(git_default_email);
git_default_email[len++] = '.';
if (he && (domainname = strchr(he->h_name, '.')))
strncpy(git_default_email + len, domainname + 1, sizeof(git_default_email) - len);
else
strncpy(git_default_email + len, "(none)", sizeof(git_default_email) - len);
git_default_email[sizeof(git_default_email) - 1] = 0;
}
/* And set the default date */
datestamp(git_default_date, sizeof(git_default_date));
return 0;
}
static int add_raw(char *buf, int size, int offset, const char *str)
{
int len = strlen(str);
if (offset + len > size)
return size;
memcpy(buf + offset, str, len);
return offset + len;
}
static int crud(unsigned char c)
{
static char crud_array[256];
static int crud_array_initialized = 0;
if (!crud_array_initialized) {
int k;
for (k = 0; k <= 31; ++k) crud_array[k] = 1;
crud_array[' '] = 1;
crud_array['.'] = 1;
crud_array[','] = 1;
crud_array[':'] = 1;
crud_array[';'] = 1;
crud_array['<'] = 1;
crud_array['>'] = 1;
crud_array['"'] = 1;
crud_array['\''] = 1;
crud_array_initialized = 1;
}
return crud_array[c];
}
/*
* Copy over a string to the destination, but avoid special
* characters ('\n', '<' and '>') and remove crud at the end
*/
static int copy(char *buf, int size, int offset, const char *src)
{
int i, len;
unsigned char c;
/* Remove crud from the beginning.. */
while ((c = *src) != 0) {
if (!crud(c))
break;
src++;
}
/* Remove crud from the end.. */
len = strlen(src);
while (len > 0) {
c = src[len-1];
if (!crud(c))
break;
--len;
}
/*
* Copy the rest to the buffer, but avoid the special
* characters '\n' '<' and '>' that act as delimeters on
* a identification line
*/
for (i = 0; i < len; i++) {
c = *src++;
switch (c) {
case '\n': case '<': case '>':
continue;
}
if (offset >= size)
return size;
buf[offset++] = c;
}
return offset;
}
char *get_ident(const char *name, const char *email, const char *date_str)
{
static char buffer[1000];
char date[50];
int i;
if (!name)
name = git_default_name;
if (!email)
email = git_default_email;
strcpy(date, git_default_date);
if (date_str)
parse_date(date_str, date, sizeof(date));
i = copy(buffer, sizeof(buffer), 0, name);
i = add_raw(buffer, sizeof(buffer), i, " <");
i = copy(buffer, sizeof(buffer), i, email);
i = add_raw(buffer, sizeof(buffer), i, "> ");
i = copy(buffer, sizeof(buffer), i, date);
if (i >= sizeof(buffer))
die("Impossibly long personal identifier");
buffer[i] = 0;
return buffer;
}
char *git_author_info(void)
{
return get_ident(getenv("GIT_AUTHOR_NAME"), getenv("GIT_AUTHOR_EMAIL"), getenv("GIT_AUTHOR_DATE"));
}
char *git_committer_info(void)
{
return get_ident(getenv("GIT_COMMITTER_NAME"), getenv("GIT_COMMITTER_EMAIL"), getenv("GIT_COMMITTER_DATE"));
}