CS456 - Systems Programming Spring 2026

Displaying ./code/h4/extras.h

/*

This custom header file has functions written by me for use in other programs

To use in your source code add this line: #include "extras.h"


Here, you will finish the function PrintType.h. refer to man 7 inode for assistance

*/

//needed header files for functions
#include <sys/stat.h>

//takes two strings representing filenames, checks if they're the same file
int fileMatchStr(char **f1, char **f2){

	//calling stat on both files
	struct stat file1;
	struct stat file2;
	lstat(f1, &file1);
	lstat(f2, &file2);

	//check if devices are different
	if(file1.st_dev != file2.st_dev)
		return 0;

	//checking if inodes are different
	if(file1.st_ino != file2.st_ino)
		return 0;

	//if we get here, it's the same file, so return 1
	return 1;

}

//checking if file has a certain permission
int checkPermissions(int mode, int perm){        
        if((mode & perm) == perm)
            return 1;
         else    
            return 0; 
}

int getType(int mode){

	//return what filetype this file is
	int type = mode & 0170000;
	return type;
	
}

void printType(int type){

	//print message indicating type
	//find these values in man 7 inode

	//regular file
	if(S_IFREG == type)
		printf("Regular File\n");

	//directory
	if(S_IFDIR == type)
		printf("Directory\n");	

	//character device


	//block device


	//FIFO


	//symbolic link


	//socket


}