mirror of
https://github.com/git/git.git
synced 2024-11-24 10:26:17 +08:00
6a1f79c1f1
So far, e.g. git-update-index --refresh was basically uninterruptable by ctrl-c, since it hooked the SIGINT handler, but that handler would only unlink the lockfile but not actually quit. This makes it propagate the signal to the default handler. Note that I expected it to work without resetting the signal handler to SIG_DFL, but without that it ended in an infinite loop of tgkill()s - is my glibc violating SUS or what? Signed-off-by: Petr Baudis <pasky@suse.cz> Signed-off-by: Junio C Hamano <junkio@cox.net>
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
/*
|
|
* Copyright (c) 2005, Junio C Hamano
|
|
*/
|
|
#include <signal.h>
|
|
#include "cache.h"
|
|
|
|
static struct cache_file *cache_file_list;
|
|
|
|
static void remove_lock_file(void)
|
|
{
|
|
while (cache_file_list) {
|
|
if (cache_file_list->lockfile[0])
|
|
unlink(cache_file_list->lockfile);
|
|
cache_file_list = cache_file_list->next;
|
|
}
|
|
}
|
|
|
|
static void remove_lock_file_on_signal(int signo)
|
|
{
|
|
remove_lock_file();
|
|
signal(SIGINT, SIG_DFL);
|
|
raise(signo);
|
|
}
|
|
|
|
int hold_index_file_for_update(struct cache_file *cf, const char *path)
|
|
{
|
|
int fd;
|
|
sprintf(cf->lockfile, "%s.lock", path);
|
|
fd = open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0666);
|
|
if (fd >=0 && !cf->next) {
|
|
cf->next = cache_file_list;
|
|
cache_file_list = cf;
|
|
signal(SIGINT, remove_lock_file_on_signal);
|
|
atexit(remove_lock_file);
|
|
}
|
|
return fd;
|
|
}
|
|
|
|
int commit_index_file(struct cache_file *cf)
|
|
{
|
|
char indexfile[PATH_MAX];
|
|
int i;
|
|
strcpy(indexfile, cf->lockfile);
|
|
i = strlen(indexfile) - 5; /* .lock */
|
|
indexfile[i] = 0;
|
|
i = rename(cf->lockfile, indexfile);
|
|
cf->lockfile[0] = 0;
|
|
return i;
|
|
}
|
|
|
|
void rollback_index_file(struct cache_file *cf)
|
|
{
|
|
if (cf->lockfile[0])
|
|
unlink(cf->lockfile);
|
|
cf->lockfile[0] = 0;
|
|
}
|
|
|