blob: 5f2ab9a206d9ef12d060d866585c6e67d139b2e7 [file] [log] [blame] [edit]
/*
* timeout - wait for timeout
*
* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <common.h>
#include <command.h>
#include <linux/stat.h>
#include <errno.h>
#include <getopt.h>
#include <clock.h>
#define TIMEOUT_RETURN (1 << 0)
#define TIMEOUT_CTRLC (1 << 1)
#define TIMEOUT_ANYKEY (1 << 2)
#define TIMEOUT_SILENT (1 << 3)
static int do_timeout(struct command *cmdtp, int argc, char *argv[])
{
int timeout = 3, ret = 1;
int flags = 0, opt, countdown;
uint64_t start, second;
while((opt = getopt(argc, argv, "t:crsa")) > 0) {
switch(opt) {
case 'r':
flags |= TIMEOUT_RETURN;
break;
case 'c':
flags |= TIMEOUT_CTRLC;
break;
case 'a':
flags |= TIMEOUT_ANYKEY;
break;
case 's':
flags |= TIMEOUT_SILENT;
break;
default:
return 1;
}
}
if (optind == argc)
return COMMAND_ERROR_USAGE;
timeout = simple_strtoul(argv[optind], NULL, 0);
start = get_time_ns();
second = start;
countdown = timeout;
if (!(flags & TIMEOUT_SILENT))
printf("%2d", countdown--);
do {
if (tstc()) {
int key = getc();
if (flags & TIMEOUT_CTRLC && key == 3)
goto out;
if (flags & TIMEOUT_ANYKEY)
goto out;
if (flags & TIMEOUT_RETURN && key == '\n')
goto out;
}
if (!(flags & TIMEOUT_SILENT) && is_timeout(second, SECOND)) {
printf("\b\b%2d", countdown--);
second += SECOND;
}
} while (!is_timeout(start, timeout * SECOND));
ret = 0;
out:
if (!(flags & TIMEOUT_SILENT))
printf("\n");
return ret;
}
static const __maybe_unused char cmd_timeout_help[] =
"Usage: timeout [OPTION]... <timeout>\n"
"Wait <timeout> seconds for a timeout. Return 1 if the user intervented\n"
"or 0 if a timeout occured\n"
" -a interrupt on any key\n"
" -c interrupt on ctrl-c\n"
" -r interrupt on return\n"
" -s silent mode\n";
BAREBOX_CMD_START(timeout)
.cmd = do_timeout,
.usage = "wait for a specified timeout",
BAREBOX_CMD_HELP(cmd_timeout_help)
BAREBOX_CMD_END