/*
* Copyright (c) 2005, Junio C Hamano
*/
-#include <signal.h>
#include "cache.h"
static struct lock_file *lock_file_list;
raise(signo);
}
-int hold_lock_file_for_update(struct lock_file *lk, const char *path)
+static int lock_file(struct lock_file *lk, const char *path)
{
int fd;
sprintf(lk->filename, "%s.lock", path);
fd = open(lk->filename, O_RDWR | O_CREAT | O_EXCL, 0666);
- if (fd >=0 && !lk->next) {
- lk->next = lock_file_list;
- lock_file_list = lk;
- signal(SIGINT, remove_lock_file_on_signal);
- atexit(remove_lock_file);
+ if (0 <= fd) {
+ if (!lk->on_list) {
+ lk->next = lock_file_list;
+ lock_file_list = lk;
+ lk->on_list = 1;
+ }
+ if (lock_file_list) {
+ signal(SIGINT, remove_lock_file_on_signal);
+ atexit(remove_lock_file);
+ }
+ if (adjust_shared_perm(lk->filename))
+ return error("cannot fix permission bits on %s",
+ lk->filename);
}
+ else
+ lk->filename[0] = 0;
+ return fd;
+}
+
+int hold_lock_file_for_update(struct lock_file *lk, const char *path, int die_on_error)
+{
+ int fd = lock_file(lk, path);
+ if (fd < 0 && die_on_error)
+ die("unable to create '%s.lock': %s", path, strerror(errno));
return fd;
}