ls-tree.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7
   8 static int list(unsigned char *sha1)
   9 {
  10         void *buffer;
  11         unsigned long size;
  12         char type[20];
  13
  14         buffer = read_sha1_file(sha1, type, &size);
  15         if (!buffer)
  16                 usage("unable to read sha1 file");
  17         if (strcmp(type, "tree"))
  18                 usage("expected a 'tree' node");
  19         while (size) {
  20                 int len = strlen(buffer)+1;
  21                 unsigned char *sha1 = buffer + len;
  22                 char *path = strchr(buffer, ' ')+1;
  23                 unsigned int mode;
  24                 unsigned char *type;
  25
  26                 if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
  27                         usage("corrupt 'tree' file");
  28                 buffer = sha1 + 20;
  29                 size -= len + 20;
  30                 /* XXX: We do some ugly mode heuristics here.
  31                  * It seems not worth it to read each file just to get this
  32                  * and the file size. -- pasky@ucw.cz */
  33                 type = S_ISDIR(mode) ? "tree" : "blob";
  34                 printf("%03o\t%s\t%s\t%s\n", mode, type, sha1_to_hex(sha1), path);
  35         }
  36         return 0;
  37 }
  38
  39 int main(int argc, char **argv)
  40 {
  41         unsigned char sha1[20];
  42
  43         if (argc != 2)
  44                 usage("ls-tree <key>");
  45         if (get_sha1_hex(argv[1], sha1) < 0)
  46                 usage("ls-tree <key>");
  47         sha1_file_directory = getenv(DB_ENVIRONMENT);
  48         if (!sha1_file_directory)
  49                 sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
  50         if (list(sha1) < 0)
  51                 usage("list failed");
  52         return 0;
  53 }