1GETTIMEOFDAY(3P) POSIX Programmer's Manual GETTIMEOFDAY(3P)
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6 This manual page is part of the POSIX Programmer's Manual. The Linux
7 implementation of this interface may differ (consult the corresponding
8 Linux manual page for details of Linux behavior), or the interface may
9 not be implemented on Linux.
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13 gettimeofday — get the date and time
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16 #include <sys/time.h>
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18 int gettimeofday(struct timeval *restrict tp, void *restrict tzp);
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21 The gettimeofday() function shall obtain the current time, expressed as
22 seconds and microseconds since the Epoch, and store it in the timeval
23 structure pointed to by tp. The resolution of the system clock is
24 unspecified.
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26 If tzp is not a null pointer, the behavior is unspecified.
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29 The gettimeofday() function shall return 0 and no value shall be
30 reserved to indicate an error.
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33 No errors are defined.
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35 The following sections are informative.
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38 None.
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41 Applications should use the clock_gettime() function instead of the
42 obsolescent gettimeofday() function.
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45 None.
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48 The gettimeofday() function may be removed in a future version.
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51 clock_getres(), ctime()
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53 The Base Definitions volume of POSIX.1‐2008, <sys_time.h>
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56 Portions of this text are reprinted and reproduced in electronic form
57 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
58 -- Portable Operating System Interface (POSIX), The Open Group Base
59 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
60 cal and Electronics Engineers, Inc and The Open Group. (This is
61 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
62 event of any discrepancy between this version and the original IEEE and
63 The Open Group Standard, the original IEEE and The Open Group Standard
64 is the referee document. The original Standard can be obtained online
65 at http://www.unix.org/online.html .
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67 Any typographical or formatting errors that appear in this page are
68 most likely to have been introduced during the conversion of the source
69 files to man page format. To report such errors, see https://www.ker‐
70 nel.org/doc/man-pages/reporting_bugs.html .
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74IEEE/The Open Group 2013 GETTIMEOFDAY(3P)