C - Check for file existence and permissions
============================================

Public domain
********************************************************************************

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

    #define FILE "/etc/resolv.conf"

    int main()
    {
        if(access(FILE, F_OK) == 0)
            printf("%s is exist.\n", FILE);
    
        if(access(FILE, R_OK) == 0)
            printf("%s is readable.\n", FILE);
    
        if(access(FILE, W_OK) == 0)
            printf("%s is writable.\n", FILE);
    
        if(access(FILE, X_OK) == 0)
            printf("%s is executable.\n", FILE);
    
        if(access(FILE, R_OK | W_OK) == 0)
            printf("%s is readable AND writable.\n", FILE);
    
        return 0;
    }

********************************************************************************
_BY: Pejman Moghadam_  
_TAG: permission, existence_  
_DATE: 2012-02-25 14:55:54_