123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
/*
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* timeout - wait for timeout
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <common.h>
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#include <command.h>
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#include <linux/stat.h>
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#include <errno.h>
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#include <getopt.h>
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#include <clock.h>
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#include <environment.h>
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#define TIMEOUT_RETURN (1 << 0)
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#define TIMEOUT_CTRLC (1 << 1)
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#define TIMEOUT_ANYKEY (1 << 2)
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#define TIMEOUT_SILENT (1 << 3)
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static int do_timeout(int argc, char *argv[])
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{
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int timeout = 3, ret = 1;
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int flags = 0, opt, countdown;
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int key = 0;
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uint64_t start, second;
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const char *varname = NULL;
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while((opt = getopt(argc, argv, "t:crsav:")) > 0) {
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switch(opt) {
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case 'r':
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flags |= TIMEOUT_RETURN;
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break;
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case 'c':
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flags |= TIMEOUT_CTRLC;
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break;
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case 'a':
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flags |= TIMEOUT_ANYKEY;
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break;
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case 's':
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flags |= TIMEOUT_SILENT;
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break;
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case 'v':
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varname = optarg;
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break;
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default:
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return 1;
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}
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}
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if (optind == argc)
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return COMMAND_ERROR_USAGE;
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timeout = simple_strtoul(argv[optind], NULL, 0);
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start = get_time_ns();
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second = start;
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countdown = timeout;
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if (!(flags & TIMEOUT_SILENT))
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printf("%2d", countdown--);
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do {
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if (tstc()) {
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key = getc();
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if (flags & TIMEOUT_CTRLC && key == 3)
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goto out;
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if (flags & TIMEOUT_ANYKEY)
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goto out;
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if (flags & TIMEOUT_RETURN && key == '\n')
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goto out;
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key = 0;
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}
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if (!(flags & TIMEOUT_SILENT) && is_timeout(second, SECOND)) {
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printf("\b\b%2d", countdown--);
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second += SECOND;
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}
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} while (!is_timeout(start, timeout * SECOND));
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ret = 0;
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out:
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if (varname && key) {
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char str[2] = { };
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str[0] = key;
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setenv(varname, str);
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}
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if (!(flags & TIMEOUT_SILENT))
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printf("\n");
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return ret;
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}
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BAREBOX_CMD_HELP_START(timeout)
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BAREBOX_CMD_HELP_TEXT("Wait SECONDS for a timeout. Return 1 if the user intervented.")
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BAREBOX_CMD_HELP_TEXT("")
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BAREBOX_CMD_HELP_TEXT("Options:")
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BAREBOX_CMD_HELP_OPT("-a", "interrupt on any key")
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BAREBOX_CMD_HELP_OPT("-c", "interrupt on Ctrl-C")
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BAREBOX_CMD_HELP_OPT("-r", "interrupt on RETURN")
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BAREBOX_CMD_HELP_OPT("-s", "silent mode")
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BAREBOX_CMD_HELP_END
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BAREBOX_CMD_START(timeout)
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.cmd = do_timeout,
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BAREBOX_CMD_DESC("wait for a specified timeout")
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BAREBOX_CMD_OPTS("[-acrs] SECONDS")
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BAREBOX_CMD_GROUP(CMD_GRP_CONSOLE)
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BAREBOX_CMD_HELP(cmd_timeout_help)
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BAREBOX_CMD_END
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