send-email: discard blank around address in extract_valid_address as well.
[git/git.git] / lockfile.c
CommitLineData
021b6e45
JH
1/*
2 * Copyright (c) 2005, Junio C Hamano
3 */
021b6e45
JH
4#include "cache.h"
5
6static struct lock_file *lock_file_list;
5e7f56ac 7static const char *alternate_index_output;
021b6e45
JH
8
9static void remove_lock_file(void)
10{
5e635e39
JH
11 pid_t me = getpid();
12
021b6e45 13 while (lock_file_list) {
5e635e39
JH
14 if (lock_file_list->owner == me &&
15 lock_file_list->filename[0])
021b6e45
JH
16 unlink(lock_file_list->filename);
17 lock_file_list = lock_file_list->next;
18 }
19}
20
21static void remove_lock_file_on_signal(int signo)
22{
23 remove_lock_file();
24 signal(SIGINT, SIG_DFL);
25 raise(signo);
26}
27
40aaae88 28static int lock_file(struct lock_file *lk, const char *path)
021b6e45
JH
29{
30 int fd;
31 sprintf(lk->filename, "%s.lock", path);
32 fd = open(lk->filename, O_RDWR | O_CREAT | O_EXCL, 0666);
138086a7 33 if (0 <= fd) {
5e635e39 34 lk->owner = getpid();
1084b845 35 if (!lk->on_list) {
138086a7
JH
36 lk->next = lock_file_list;
37 lock_file_list = lk;
1084b845
JH
38 lk->on_list = 1;
39 }
40 if (lock_file_list) {
138086a7
JH
41 signal(SIGINT, remove_lock_file_on_signal);
42 atexit(remove_lock_file);
43 }
44 if (adjust_shared_perm(lk->filename))
45 return error("cannot fix permission bits on %s",
46 lk->filename);
021b6e45 47 }
1084b845
JH
48 else
49 lk->filename[0] = 0;
021b6e45
JH
50 return fd;
51}
52
40aaae88
JH
53int hold_lock_file_for_update(struct lock_file *lk, const char *path, int die_on_error)
54{
55 int fd = lock_file(lk, path);
56 if (fd < 0 && die_on_error)
f9e8a43a 57 die("unable to create '%s.lock': %s", path, strerror(errno));
40aaae88
JH
58 return fd;
59}
60
021b6e45
JH
61int commit_lock_file(struct lock_file *lk)
62{
63 char result_file[PATH_MAX];
64 int i;
65 strcpy(result_file, lk->filename);
66 i = strlen(result_file) - 5; /* .lock */
67 result_file[i] = 0;
68 i = rename(lk->filename, result_file);
69 lk->filename[0] = 0;
70 return i;
71}
72
30ca07a2
JH
73int hold_locked_index(struct lock_file *lk, int die_on_error)
74{
75 return hold_lock_file_for_update(lk, get_index_file(), die_on_error);
76}
77
5e7f56ac
JH
78void set_alternate_index_output(const char *name)
79{
80 alternate_index_output = name;
81}
82
30ca07a2
JH
83int commit_locked_index(struct lock_file *lk)
84{
5e7f56ac
JH
85 if (alternate_index_output) {
86 int result = rename(lk->filename, alternate_index_output);
30ca07a2
JH
87 lk->filename[0] = 0;
88 return result;
89 }
90 else
91 return commit_lock_file(lk);
92}
93
021b6e45
JH
94void rollback_lock_file(struct lock_file *lk)
95{
96 if (lk->filename[0])
97 unlink(lk->filename);
98 lk->filename[0] = 0;
99}