/* error.c */
#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>

int main(int argc,char *argv[])
{
    int fd;
    char *filename = "/invalid/path/name";

    fd = creat(filename,S_IRWXU | S_IRWXG);
    if(fd < 0) {
        fprintf(stderr,"Error code: %d\n",errno);
        perror("Unable to create file");
        fprintf(stderr,"Unable to create %s: %s\n",
                filename,strerror(errno));
    }
}