[c] What's the best way to check if a file exists in C?

Use stat like this:

#include <sys/stat.h>   // stat
#include <stdbool.h>    // bool type

bool file_exists (char *filename) {
  struct stat   buffer;   
  return (stat (filename, &buffer) == 0);
}

and call it like this:

#include <stdio.h>      // printf

int main(int ac, char **av) {
    if (ac != 2)
        return 1;

    if (file_exists(av[1]))
        printf("%s exists\n", av[1]);
    else
        printf("%s does not exist\n", av[1]);

    return 0;
}

Examples related to c

conflicting types for 'outchar' Can't compile C program on a Mac after upgrade to Mojave Program to find largest and second largest number in array Prime numbers between 1 to 100 in C Programming Language In c, in bool, true == 1 and false == 0? How I can print to stderr in C? Visual Studio Code includePath "error: assignment to expression with array type error" when I assign a struct field (C) Compiling an application for use in highly radioactive environments How can you print multiple variables inside a string using printf?

Examples related to filesystems

Get an image extension from an uploaded file in Laravel Notepad++ cached files location No space left on device How to create a directory using Ansible best way to get folder and file list in Javascript Exploring Docker container's file system Remove directory which is not empty GIT_DISCOVERY_ACROSS_FILESYSTEM not set Trying to create a file in Android: open failed: EROFS (Read-only file system) Node.js check if path is file or directory

Examples related to cross-platform

How to execute XPath one-liners from shell? iOS / Android cross platform development How to detect reliably Mac OS X, iOS, Linux, Windows in C preprocessor? What is "stdafx.h" used for in Visual Studio? How to identify platform/compiler from preprocessor macros? How to get the home directory in Python? How to check if running in Cygwin, Mac or Linux? Automatically add all files in a folder to a target using CMake? How is Java platform-independent when it needs a JVM to run? Difference between "\n" and Environment.NewLine