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        sprintf(cf->lockfile, "%s.lock", path);
  26        cf->next = cache_file_list;
  27        cache_file_list = cf;
  28        if (!cf->next) {
  29                signal(SIGINT, remove_lock_file_on_signal);
  30                atexit(remove_lock_file);
  31        }
  32        return open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0600);
  33}
  34
  35int commit_index_file(struct cache_file *cf)
  36{
  37        char indexfile[PATH_MAX];
  38        int i;
  39        strcpy(indexfile, cf->lockfile);
  40        i = strlen(indexfile) - 5; /* .lock */
  41        indexfile[i] = 0;
  42        i = rename(cf->lockfile, indexfile);
  43        cf->lockfile[0] = 0;
  44        return i;
  45}
  46
  47void rollback_index_file(struct cache_file *cf)
  48{
  49        if (cf->lockfile[0])
  50                unlink(cf->lockfile);
  51        cf->lockfile[0] = 0;
  52}
  53