Show Modes Of A Linux File

showmodes.c

#include <stdio.h>
#include <sys/stat.h>
#include <stdlib.h>

int main(int argc, char* argv[])
{
	if(argc != 2) {
		printf("usage: %s <filename>\n", argv[0]);
		exit(1);
	}
	
	struct stat fileStat;
	
	int result = stat(argv[1], &fileStat);
	
	if(result != 0) {
		printf("No such file found: %s\n", argv[1]);
		exit(2);
	}

	unsigned int OTH_X = 1;
	unsigned int OTH_W = 1 << 1;
	unsigned int OTH_R = 1 << 2;
	
	unsigned int GRP_X = 1 << 3;
	unsigned int GRP_W = 1 << 4;
	unsigned int GRP_R = 1 << 5;

	unsigned int USR_X = 1 << 6;
	unsigned int USR_W = 1 << 7;
	unsigned int USR_R = 1 << 8;
	
	unsigned int MODE = fileStat.st_mode;
		
	printf("File Mode: %c%c%c%c%c%c%c%c%c\n",
		( MODE & USR_R ) == USR_R ? 'r' : '-' ,
		( MODE & USR_W ) == USR_W ? 'w' : '-' ,
		( MODE & USR_X ) == USR_X ? 'x' : '-' ,
		( MODE & GRP_R ) == GRP_R ? 'r' : '-' ,
		( MODE & GRP_W ) == GRP_W ? 'w' : '-' ,
		( MODE & GRP_X ) == GRP_X ? 'x' : '-' ,
		( MODE & OTH_R ) == OTH_R ? 'r' : '-' ,
		( MODE & OTH_W ) == OTH_W ? 'w' : '-' ,
		( MODE & OTH_X ) == OTH_X ? 'x' : '-' 
	);

}

Usage;