k9core/src/dirname.c

#include <stdio.h>
#include <libgen.h>

int
main(int argc, char *argv[])
{
  char *dir = dirname(argv[1]);
  if(dir == NULL) {
    fprintf(stderr, "%s", argv[0]);
    return 1;
  }
  printf("%s/\n", dir); /* Trailing slash because POSIX */
  return 0;
}