file_demo.c
author Markus Bröker <mbroeker@largo.dyndns.tv>
Sat, 13 Nov 2010 04:05:14 +0100
changeset 153 b223089872b6
parent 138 dff18d1ac2af
permissions -rw-r--r--
ipv6 support added committer: Markus Bröker <mbroeker@largo.homelinux.org>
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
     1
/**
77
49e0babccb23 HEADER TAGS
Markus Bröker <mbroeker@largo.dyndns.tv>
parents: 29
diff changeset
     2
 * file_demo.c
9
c3fecc82ade6 standard tags for git projects
Markus Bröker <mbroeker@largo.dyndns.tv>
parents: 8
diff changeset
     3
 * Copyright (C) 2008 Markus Broeker
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
     4
 */
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
     5
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
     6
#include <stdio.h>
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
     7
#include <stdlib.h>
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
     8
#include <unistd.h>
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
     9
#include <sys/types.h>
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    10
#include <string.h>
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    11
#include <fcntl.h>
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    12
138
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    13
#define TESTFILE1 "/tmp/test1.txt"
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    14
#define TESTFILE2 "/tmp/test2.txt"
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    15
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    16
int main (int argc, char **argv)
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    17
{
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    18
    int fd1;
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    19
    int fd2;
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    20
    int mode;
27
81a574d60c15 typo in min2time format string
Markus Bröker <mbroeker@largo.dyndns.tv>
parents: 9
diff changeset
    21
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    22
    char *str = "Schreib mal was!";
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    23
138
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    24
    if (argc != 2) {
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    25
        printf ("Usage: %s <MODE>\n", argv[0]);
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    26
        return -1;
138
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    27
    }
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    28
    mode = strtoul (argv[1], NULL, 8);
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    29
138
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    30
    unlink (TESTFILE1);
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    31
    unlink (TESTFILE2);
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    32
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    33
    /*
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    34
     * Opens ReadOnly
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    35
     */
138
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    36
    fd1 = open (TESTFILE1, O_CREAT, mode);
dff18d1ac2af Compatibility: We support Linux and BSD
Markus Brökers <mbroeker@largo.homelinux.org>
parents: 131
diff changeset
    37
    fd2 = open (TESTFILE2, O_RDWR | O_CREAT, mode);
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    38
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    39
    if (fd1)
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    40
        if (write (fd1, str, strlen (str)) == -1)
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    41
            perror ("FD1");
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    42
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    43
    if (fd2)
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    44
        if (write (fd2, str, strlen (str) + 1) == -1)
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    45
            perror ("FD2");
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    46
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    47
    close (fd1);
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    48
    close (fd2);
8
96d16dfe787a We use return EXIT_SUCCESS instead of return 0
Markus Bröker <mbroeker@largo.dyndns.tv>
parents: 0
diff changeset
    49
96d16dfe787a We use return EXIT_SUCCESS instead of return 0
Markus Bröker <mbroeker@largo.dyndns.tv>
parents: 0
diff changeset
    50
    return EXIT_SUCCESS;
0
af501b0c1716 demos cvs copy
Markus Bröker <mbroeker@largo.dyndns.tv>
parents:
diff changeset
    51
}