check-files.c

   1 /*
   2  * check-files.c
   3  *
   4  * Check that a set of files are up-to-date in the filesystem or
   5  * do not exist. Used to verify a patch target before doing a patch.
   6  *
   7  * Copyright (C) 2005 Linus Torvalds
   8  */
   9 #include "cache.h"
  10
  11 static void check_file(const char *path)
  12 {
  13         int fd = open(path, O_RDONLY);
  14         struct cache_entry *ce;
  15         struct stat st;
  16         int pos, changed;
  17
  18         /* Nonexistent is fine */
  19         if (fd < 0) {
  20                 if (errno != ENOENT)
  21                         usage("%s: %s", path, strerror(errno));
  22                 return;
  23         }
  24
  25         /* Exists but is not in the cache is not fine */
  26         pos = cache_name_pos(path, strlen(path));
  27         if (pos < 0)
  28                 usage("preparing to update existing file '%s' not in cache", path);
  29         ce = active_cache[pos];
  30
  31         if (fstat(fd, &st) < 0)
  32                 usage("fstat(%s): %s", path, strerror(errno));
  33
  34         changed = cache_match_stat(ce, &st);
  35         if (changed)
  36                 usage("preparing to update file '%s' not uptodate in cache", path);
  37 }
  38
  39 int main(int argc, char **argv)
  40 {
  41         int i;
  42
  43         read_cache();
  44         for (i = 1; i < argc ; i++)
  45                 check_file(argv[i]);
  46         return 0;
  47 }