t/helper/test-truncate.c

   1 #include "test-tool.h"
   2 #include "git-compat-util.h"
   3
   4 /*
   5  * Truncate a file to the given size.
   6  */
   7 int cmd__truncate(int argc, const char **argv)
   8 {
   9         char *p = NULL;
  10         uintmax_t sz = 0;
  11         int fd = -1;
  12
  13         if (argc != 3)
  14                 die("expected filename and size");
  15
  16         sz = strtoumax(argv[2], &p, 0);
  17         if (*p)
  18                 die("invalid size");
  19
  20         fd = xopen(argv[1], O_WRONLY | O_CREAT, 0600);
  21
  22         if (ftruncate(fd, (off_t) sz) < 0)
  23                 die_errno("failed to truncate file");
  24         return 0;
  25 }