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

int main(int argc, char **argv)
{
    char * const filename = argv[1];

    if (!filename)
    {
        printf("%s: Needs a filename parameter.\n", argv[0]);
        return -1;
    }

    printf("%s %s as a normal file.\n",   filename, (0 != access(filename, F_OK)) ? "does not exist" : "exists" );
    printf("%s %s a readable file.\n",    filename, (0 != access(filename, R_OK)) ? "is not" : "is" );
    printf("%s %s a writeable file.\n",   filename, (0 != access(filename, W_OK)) ? "is not" : "is" );
    printf("%s %s an executable file.\n", filename, (0 != access(filename, X_OK)) ? "is not" : "is" );

    return 0;
}