mirror of
https://github.com/libretro/Lakka-LibreELEC.git
synced 2024-12-15 22:39:12 +00:00
55 lines
1.0 KiB
C
55 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2020-present Team LibreELEC (https://libreelec.tv) */
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#include <sys/timex.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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#define POLL_FREQ 10
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void usage(char *name)
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{
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if (!name)
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name = "wait-time-sync";
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printf("Usage: %s [-t seconds | --timeout seconds]\n", name);
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exit(2);
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}
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int main(int argc, char** argv)
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{
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unsigned timeout = UINT_MAX;
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int rc = 0;
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if (argc == 3)
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{
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unsigned long val;
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char *p;
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if (strcmp(argv[1], "-t") && strcmp(argv[1], "--timeout"))
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usage(argv[0]);
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val = strtoul(argv[2], &p, 0);
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if (*p || val == 0 || val >= UINT_MAX / POLL_FREQ)
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usage(argv[0]);
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timeout = (unsigned)val * POLL_FREQ;
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}
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else if (argc != 1)
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usage(argv[0]);
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for ( ; timeout; --timeout)
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{
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struct timex tx = {};
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rc = adjtimex(&tx);
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if (rc != TIME_ERROR)
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break;
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usleep(1000000U / POLL_FREQ);
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}
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return rc == -1 ? errno : !timeout;
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}
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