1 /* vi: set sw=4 ts=4: */
3 * Mini watch implementation for busybox
5 * Copyright (C) 2001 by Michael Habermann <mhabermann@gmx.de>
6 * Copyrigjt (C) Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
11 /* BB_AUDIT SUSv3 N/A */
12 /* BB_AUDIT GNU defects -- only option -n is supported. */
17 int watch_main(int argc, char **argv)
21 char **watched_argv, *header;
23 if (argc < 2) bb_show_usage();
25 get_terminal_width_height(STDOUT_FILENO, &width, 0);
26 header = xzalloc(width--);
28 /* don't use getopt, because it permutes the arguments */
30 if ((argc > 3) && argv[0][0] == '-' && argv[0][1] == 'n') {
31 period = bb_xgetularg10_bnd(argv[1], 1, UINT_MAX);
37 len = snprintf(header, width, "Every %ds:", period);
38 while (*argv && len<width)
39 snprintf(header+len, width-len, " %s", *(argv++));
49 header[width-len] = 0;
50 bb_printf("\033[H\033[J%s %s\n", header, thyme);
52 waitpid(xspawn(watched_argv),0,0);
55 if (ENABLE_FEATURE_CLEAN_UP)