[PATCH] hold_index_file_for_update should not unlink failed to open .lock files atexit
[git/git.git] / index.c
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415e96c8
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1/*
2 * Copyright (c) 2005, Junio C Hamano
3 */
4#include <signal.h>
5#include "cache.h"
6
7static struct cache_file *cache_file_list;
8
9static void remove_lock_file(void)
10{
11 while (cache_file_list) {
12 if (cache_file_list->lockfile[0])
13 unlink(cache_file_list->lockfile);
14 cache_file_list = cache_file_list->next;
15 }
16}
17
18static void remove_lock_file_on_signal(int signo)
19{
20 remove_lock_file();
21}
22
23int hold_index_file_for_update(struct cache_file *cf, const char *path)
24{
d6e548d6 25 int fd;
415e96c8 26 sprintf(cf->lockfile, "%s.lock", path);
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27 fd = open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0666);
28 if (fd >=0 && !cf->next) {
29 cf->next = cache_file_list;
30 cache_file_list = cf;
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31 signal(SIGINT, remove_lock_file_on_signal);
32 atexit(remove_lock_file);
33 }
d6e548d6 34 return fd;
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35}
36
37int commit_index_file(struct cache_file *cf)
38{
39 char indexfile[PATH_MAX];
40 int i;
41 strcpy(indexfile, cf->lockfile);
42 i = strlen(indexfile) - 5; /* .lock */
43 indexfile[i] = 0;
44 i = rename(cf->lockfile, indexfile);
45 cf->lockfile[0] = 0;
46 return i;
47}
48
49void rollback_index_file(struct cache_file *cf)
50{
51 if (cf->lockfile[0])
52 unlink(cf->lockfile);
53 cf->lockfile[0] = 0;
54}
55