1	/* access.c
   2	   This example shows how to test the existence and the R/W/X permissions
   3	   of a file. 
   4	*/
     
   5	#include <stdio.h>
   6	#include <stdlib.h> 
   7	#include <unistd.h>
     
   8	main(int argc, char *argv[])
   9	{
  10	   
  11	   if (access(argv[1], F_OK) < 0)  {
  12	       printf("%s does not exist\n", argv[1]);
  13	       exit(1);
  14	   }
  15	   if (!access(argv[1], R_OK))  
  16	       printf("%s has R permission\n", argv[1]);
  17	   if (!access(argv[1], W_OK))  
  18	       printf("%s has W permission\n", argv[1]);
  19	   if (!access(argv[1], X_OK))  
  20	       printf("%s has X permission\n", argv[1]);
  21	   exit(0);                           
  22	}