unpack-file.c

   1 #include "cache.h"
   2
   3 static char *create_temp_file(unsigned char *sha1)
   4 {
   5         static char path[50];
   6         void *buf;
   7         char type[100];
   8         unsigned long size;
   9         int fd;
  10
  11         buf = read_sha1_file(sha1, type, &size);
  12         if (!buf || strcmp(type, "blob"))
  13                 die("unable to read blob object %s", sha1_to_hex(sha1));
  14
  15         strcpy(path, ".merge_file_XXXXXX");
  16         fd = mkstemp(path);
  17         if (fd < 0)
  18                 die("unable to create temp-file");
  19         if (write(fd, buf, size) != size)
  20                 die("unable to write temp-file");
  21         close(fd);
  22         return path;
  23 }
  24
  25 int main(int argc, char **argv)
  26 {
  27         unsigned char sha1[20];
  28
  29         if (argc != 2 || get_sha1(argv[1], sha1))
  30                 usage("git-unpack-file <sha1>");
  31
  32         puts(create_temp_file(sha1));
  33         return 0;
  34 }