Andrew's git - gitweb.git/blob

   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{
  25        int fd;
  26        sprintf(cf->lockfile, "%s.lock", path);
  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;
  31                signal(SIGINT, remove_lock_file_on_signal);
  32                atexit(remove_lock_file);
  33        }
  34        return fd;
  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