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/* vi: set sw=4 ts=4: */
/*
* Mini watch implementation for busybox
*
* Copyright (C) 2001 by Michael Habermann <mhabermann@gmx.de>
* Copyrigjt (C) Mar 16, 2003 Manuel Novoa III (mjn3@codepoet.org)
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
/* BB_AUDIT SUSv3 N/A */
/* BB_AUDIT GNU defects -- only option -n is supported. */
#include "busybox.h"
int watch_main(int argc, char **argv)
{
int width, len;
unsigned period = 2;
char **watched_argv, *header;
if (argc < 2) bb_show_usage();
get_terminal_width_height(STDOUT_FILENO, &width, 0);
header = xzalloc(width--);
/* don't use getopt, because it permutes the arguments */
++argv;
if ((argc > 3) && argv[0][0] == '-' && argv[0][1] == 'n') {
period = xatou(argv[1]);
argv += 2;
}
watched_argv = argv;
/* create header */
len = snprintf(header, width, "Every %ds:", period);
while (*argv && len<width)
snprintf(header+len, width-len, " %s", *(argv++));
while (1) {
char *thyme;
time_t t;
time(&t);
thyme = ctime(&t);
len = strlen(thyme);
if (len < width)
header[width-len] = 0;
bb_printf("\033[H\033[J%s %s\n", header, thyme);
waitpid(xspawn(watched_argv),0,0);
sleep(period);
}
if (ENABLE_FEATURE_CLEAN_UP)
free(header);
}
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