file_demo.c
author Markus Bröker <mbroeker@largo.dyndns.tv>
Fri, 27 Dec 2013 16:00:09 +0100
changeset 167 7c6b221900bf
parent 138 dff18d1ac2af
permissions -rw-r--r--
Proper Datatypes to leave the 80's
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/**
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 * file_demo.c
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 * Copyright (C) 2008 Markus Broeker
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <string.h>
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#include <fcntl.h>
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#define TESTFILE1 "/tmp/test1.txt"
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#define TESTFILE2 "/tmp/test2.txt"
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int main (int argc, char **argv)
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{
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    int fd1;
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    int fd2;
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    int mode;
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    char *str = "Schreib mal was!";
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    if (argc != 2) {
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        printf ("Usage: %s <MODE>\n", argv[0]);
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        return -1;
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    }
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    mode = strtoul (argv[1], NULL, 8);
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    unlink (TESTFILE1);
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    unlink (TESTFILE2);
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    /*
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     * Opens ReadOnly
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     */
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    fd1 = open (TESTFILE1, O_CREAT, mode);
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    fd2 = open (TESTFILE2, O_RDWR | O_CREAT, mode);
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    if (fd1)
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        if (write (fd1, str, strlen (str)) == -1)
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            perror ("FD1");
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    if (fd2)
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        if (write (fd2, str, strlen (str) + 1) == -1)
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            perror ("FD2");
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    close (fd1);
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    close (fd2);
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    return EXIT_SUCCESS;
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}