#include	<stdio.h>
#include	<errno.h>
#include	<string.h>
#include	<fcntl.h>


/*
 * program   perror_demo.c
 * purpose   show how errno is set by syscalls
 *           and how perror prints the associated message
 *   usage   perror_demo
 *   action  tries to open() a file for a given mode
 *           then, if error, prints errno and message
 */

int main()
{
	char	name[100];			/* filename		*/
	int	mode;				/* second arg to open	*/
	int	rv = 0;				/* program status reprt */

	printf("Open what file or dir? "); 
	fgets(name, 100, stdin);
	name[strlen(name)-1] = '\0';
	printf("   Open %s for 0,1, or 2? ", name);
	scanf("%d", &mode);
	if ( open( name, mode ) == -1 ){
		printf("Oh No!, errno %d just occurred\n", errno);
		perror( name );			/* print message	*/
		printf("The error message is %s\n", strerror(errno));
		rv = 1;
	}
	else
		printf("%s opened ok\n", name );

	return rv;
 }