1 /* vi: set sw=4 ts=4: */
3 * Mini watch implementation for busybox
5 * Copyright (C) 2001 by Michael Habermann <mhabermann@gmx.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 /* getopt not needed */
33 extern int watch_main(int argc, char **argv)
35 const char date_argv[2][10] = { "date", "" };
36 const int header_len = 40;
37 char header[header_len + 1];
51 /* don't use getopt, because it permutes the arguments */
52 if (argc >= 3 && !strcmp(argv[1], "-n")) {
53 period = strtol(argv[2], NULL, 10);
63 snprintf(header, header_len, "Every %ds: ", period);
64 for (i = 0; i < cargc && (strlen(header) + strlen(cargv[i]) < header_len);
66 strcat(header, cargv[i]);
70 /* fill with blanks */
71 for (i = strlen(header); i < header_len; i++)
74 header[header_len - 1] = '\0';
77 /* thanks to lye, who showed me how to redirect stdin/stdout */
81 printf("\033[H\033[J%s", header);
82 date_main(1, (char **) date_argv);
85 pid = vfork(); /* vfork, because of ucLinux */
90 } else if (0 == pid) {
94 if (execvp(*cargv, cargv))
95 error_msg_and_die("Couldn't run command\n");
97 error_msg_and_die("Couldn't vfork\n");