source: branches/2.2.2/mindi-busybox/coreutils/watch.c @ 1247

Last change on this file since 1247 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 1.4 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini watch implementation for busybox
4 *
5 * Copyright (C) 2001 by Michael Habermann <mhabermann@gmx.de>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
8 */
9
10/* BB_AUDIT SUSv3 N/A */
11/* BB_AUDIT GNU defects -- only option -n is supported. */
12
13/* Mar 16, 2003      Manuel Novoa III   (mjn3@codepoet.org)
14 *
15 * Removed dependency on date_main(), added proper error checking, and
16 * reduced size.
17 */
18
19#include <stdio.h>
20#include <stdlib.h>
21#include <string.h>
22#include <limits.h>
23#include <time.h>
24#include <assert.h>
25#include <unistd.h>
26#include <sys/wait.h>
27#include "busybox.h"
28
29int watch_main(int argc, char **argv)
30{
31    int width, len;
32    unsigned period = 2;
33    char **watched_argv, *header;
34
35    if (argc < 2) bb_show_usage();
36
37    get_terminal_width_height(1, &width, 0);
38    header = xzalloc(width--);
39
40    /* don't use getopt, because it permutes the arguments */
41    ++argv;
42    if ((argc > 3) && !strcmp(*argv, "-n")) {
43        period = bb_xgetularg10_bnd(argv[1], 1, UINT_MAX);
44        argv += 2;
45    }
46    watched_argv = argv;
47
48    /* create header */
49
50    len = snprintf(header, width, "Every %ds:", period);
51    while (*argv && len<width)
52        snprintf(header+len, width-len, " %s", *(argv++));
53
54    while (1) {
55        char *thyme;
56        time_t t;
57
58        time(&t);
59        thyme = ctime(&t);
60        len = strlen(thyme);
61        if (len < width) header[width-len] = 0;
62       
63        printf("\033[H\033[J%s %s\n", header, thyme);
64
65        waitpid(bb_xspawn(watched_argv),0,0);
66        sleep(period);
67    }
68}
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