59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
/*
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* Copyright (c) 2020 Dylan Lom <djl@dylanlom.com>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "util.h"
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const char* argv0;
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void usage() {
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fprintf(stderr, "usage: %s time\n", argv0);
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exit(EXIT_FAILURE);
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}
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int main(int argc, char* argv[]) {
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SET_ARGV0();
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if (argc < 1) usage();
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long time;
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char* p;
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time = strtol(argv[0], &p, 10);
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if (errno != 0 || *p != '\0') {
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fprintf(stderr, "strtol: %s\n", errno
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? strerror(errno)
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: "Failed to parse time argument."
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);
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exit(EXIT_FAILURE);
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}
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SHIFT_ARGS();
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while (time) {
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/* Clear stdout, otherwise going from e.g. 10->9 leaves a trailing 0 */
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printf("\r ");
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printf("\r%d", (int)time);
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fflush(stdout);
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sleep(1);
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time--;
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}
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puts("\n");
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return EXIT_SUCCESS;
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}
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