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        signal(SIGINT, SIG_DFL);
  22        raise(signo);
  23}
  24
  25int hold_index_file_for_update(struct cache_file *cf, const char *path)
  26{
  27        int fd;
  28        sprintf(cf->lockfile, "%s.lock", path);
  29        fd = open(cf->lockfile, O_RDWR | O_CREAT | O_EXCL, 0666);
  30        if (fd >=0 && !cf->next) {
  31                cf->next = cache_file_list;
  32                cache_file_list = cf;
  33                signal(SIGINT, remove_lock_file_on_signal);
  34                atexit(remove_lock_file);
  35        }
  36        return fd;
  37}
  38
  39int commit_index_file(struct cache_file *cf)
  40{
  41        char indexfile[PATH_MAX];
  42        int i;
  43        strcpy(indexfile, cf->lockfile);
  44        i = strlen(indexfile) - 5; /* .lock */
  45        indexfile[i] = 0;
  46        i = rename(cf->lockfile, indexfile);
  47        cf->lockfile[0] = 0;
  48        return i;
  49}
  50
  51void rollback_index_file(struct cache_file *cf)
  52{
  53        if (cf->lockfile[0])
  54                unlink(cf->lockfile);
  55        cf->lockfile[0] = 0;
  56}
  57