83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/*
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* console_countdown - contdown on the console - interruptible by a keypress
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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 <clock.h>
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#include <command.h>
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#include <errno.h>
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#include <console_countdown.h>
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#include <stdio.h>
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static bool console_countdown_timeout_abort;
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void console_countdown_abort(void)
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{
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console_countdown_timeout_abort = true;
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}
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int console_countdown(int timeout_s, unsigned flags, char *out_key)
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{
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uint64_t start, second;
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int countdown, ret = -EINTR;
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int key = 0;
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start = get_time_ns();
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second = start;
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countdown = timeout_s;
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if (!(flags & CONSOLE_COUNTDOWN_SILENT))
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printf("%4d", countdown--);
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do {
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if (tstc()) {
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key = getchar();
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if (flags & CONSOLE_COUNTDOWN_ANYKEY)
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goto out;
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if (flags & CONSOLE_COUNTDOWN_RETURN && key == '\n')
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goto out;
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if (flags & CONSOLE_COUNTDOWN_CTRLC && key == 3)
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goto out;
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key = 0;
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}
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if ((flags & CONSOLE_COUNTDOWN_EXTERN) &&
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console_countdown_timeout_abort)
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goto out;
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if (!(flags & CONSOLE_COUNTDOWN_SILENT) &&
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is_timeout(second, SECOND)) {
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printf("\b\b\b\b%4d", countdown--);
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second += SECOND;
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}
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} while (!is_timeout(start, timeout_s * SECOND));
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if ((flags & CONSOLE_COUNTDOWN_EXTERN) &&
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console_countdown_timeout_abort)
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goto out;
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ret = 0;
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out:
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if (!(flags & CONSOLE_COUNTDOWN_SILENT))
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printf("\n");
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if (key && out_key)
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*out_key = key;
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console_countdown_timeout_abort = false;
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return ret;
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}
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