read-tree.c

   1 #include "cache.h"
   2
   3 static int unpack(unsigned char *sha1)
   4 {
   5         void *buffer;
   6         unsigned long size;
   7         char type[20];
   8
   9         buffer = read_sha1_file(sha1, type, &size);
  10         if (!buffer)
  11                 usage("unable to read sha1 file");
  12         if (strcmp(type, "tree"))
  13                 usage("expected a 'tree' node");
  14         while (size) {
  15                 int len = strlen(buffer)+1;
  16                 unsigned char *sha1 = buffer + len;
  17                 char *path = strchr(buffer, ' ')+1;
  18                 unsigned int mode;
  19                 if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
  20                         usage("corrupt 'tree' file");
  21                 buffer = sha1 + 20;
  22                 size -= len + 20;
  23                 printf("%o %s (%s)\n", mode, path, sha1_to_hex(sha1));
  24         }
  25         return 0;
  26 }
  27
  28 int main(int argc, char **argv)
  29 {
  30         int fd;
  31         unsigned char sha1[20];
  32
  33         if (argc != 2)
  34                 usage("read-tree <key>");
  35         if (get_sha1_hex(argv[1], sha1) < 0)
  36                 usage("read-tree <key>");
  37         sha1_file_directory = getenv(DB_ENVIRONMENT);
  38         if (!sha1_file_directory)
  39                 sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
  40         if (unpack(sha1) < 0)
  41                 usage("unpack failed");
  42         return 0;
  43 }