Command-line interface to realpath(3)

realpath.c

#include <stdio.h>
#include <limits.h>
#include <stdlib.h>

int main (int argc, char *argv[]) {
  char* instr;
  char outstr[PATH_MAX];
  
  instr = argv[1];
  
  if (!realpath(instr, outstr)) {
    printf("Usage: %s path\n", argv[0]);
    return 1;
  }
  printf("%s\n", outstr);
  return 0;
}