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47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
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/*
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* Copyright (c) 2023 Darren Tucker <dtucker@openssh.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $OpenBSD: timestamp.c,v 1.1 2023/03/01 09:29:32 dtucker Exp $ */
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/*
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* Print a microsecond-granularity timestamp to stdout in an ISO8601-ish
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* format, which we can then use as the first component of the log file
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* so that they'll sort into chronological order.
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*/
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#include <sys/time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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int
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main(void)
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{
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struct timeval tv;
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struct tm *tm;
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char buf[1024];
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if (gettimeofday(&tv, NULL) != 0)
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exit(1);
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if ((tm = localtime(&tv.tv_sec)) == NULL)
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exit(2);
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if (strftime(buf, sizeof buf, "%Y%m%dT%H%M%S", tm) <= 0)
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exit(3);
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printf("%s.%06d\n", buf, (int)tv.tv_usec);
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exit(0);
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}
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