rmv.c

   1 #include <stdio.h>
   2 static int usage(const char *b0) {
   3         dprintf(2, "usage: %s oldname newname\n"
   4                    "renames oldname to newname.\n"
   5                    "there are no options, so any file, even if starting "
   6                    "with a dash, can be renamed.\n", b0);
   7         return 1;
   8 }
   9
  10 int main(int a, char** b) {
  11         if(a != 3) return usage(b[0]);
  12         int ret = rename(b[1], b[2]);
  13         if(ret) perror("rename");
  14         return ret *-1;
  15 }