Hi

I'd like to know a way to check if a file exists in the current directory in C. Or any directory really.

Something like PHP's file_exists or Python's os.path.exists().

Is it possible to do in C standard? Thx

You can use fopen.

FILE * fp = fopen("file.txt", "rb");
if (fp == NULL) { 

    /* Can't open "file.txt" => file doesn't exist. */ 

} 

else { 

    /* File was opened, ergo it exists. */ 

    fclose(fp); // Close the file right after.

}

I don't like ^

If a file can be opened, it must exist. Ok.

But the reverse isn't always true. It can fail to open for multiple reasons, not least of which user permissions.

A better way would be checking if errno is equal to ENOENT (No entry (no such file or directory)).

Alternatively:

#include <unistd.h>

#include <stdio.h>
int main() {

    const char *filename = "file.txt";
if (access(filename, F_OK) == 0) {

        printf("File exists.\n");

    } else {

        printf("File does not exist.\n");

    }
return 0;

}

Bruh. Burned.

My bad I should of checked before posting. But he did ask how to check if a file exists, not if it doesn't exist :°

Yes it works now. Thanks for your answers!