Given a file path, we have to check whether a specified file exist or not using the access() function.

Program:

The source code to check a specified file exists or not using the access() function is given below. The given program is compiled and executed using GCC compile on UBUNTU 18.04 OS successfully.

// C program to check whether a specified file exist
// or not using access() function

#include <stdio.h>
#include <unistd.h>

int main(void)
{
    int isFileExist = 0;

    isFileExist = access("includehelp.txt", F_OK);

    if (isFileExist != -1) {
        printf("file exists.\n");
        return 1;
    }

    printf("file does not exists.\n");
    return 0;
}

Output:

file exists.

Explanation:

Here, we checked file "includehelp.txt" exists in the current directory or not using the access() function. Then printed the appropriate message on the console screen.