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TIME(3) 	      DragonFly Library Functions Manual	       TIME(3)


time -- get time of day


Standard C Library (libc, -lc)


#include <time.h> time_t time(time_t *tloc);


The time() function returns the value of time in seconds since 0 hours, 0 minutes, 0 seconds, January 1, 1970, Coordinated Universal Time. If an error occurs, time() returns the value (time_t)-1. The return value is also stored in *tloc, provided that tloc is non-null.


The time() function may fail for any of the reasons described in gettimeofday(2).


gettimeofday(2), ctime(3)


The time function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').


A time() function appeared in Version 6 AT&T UNIX.


Neither ISO/IEC 9899:1999 (``ISO C99'') nor IEEE Std 1003.1-2001 (``POSIX.1'') requires time() to set errno on failure; thus, it is impos- sible for an application to distinguish the valid time value -1 (repre- senting the last UTC second of 1969) from the error return value. Systems conforming to earlier versions of the C and POSIX standards (including older versions of FreeBSD) did not set *tloc in the error case. DragonFly 5.3 July 18, 2003 DragonFly 5.3 TIME(3am) GNU Awk Extension Modules TIME(3am)


time - time functions for gawk


@load "time" time = gettimeofday() ret = sleep(amount)


The time extension adds two functions named gettimeofday() and sleep(), as follows. gettimeofday() This function returns the number of seconds since the Epoch as a floating-point value. It should have subsecond precision. It returns -1 upon error and sets ERRNO to indicate the problem. sleep(seconds) This function attempts to sleep for the given amount of seconds, which may include a fractional portion. If seconds is negative, or the attempt to sleep fails, then it returns -1 and sets ERRNO. Otherwise, the function should return 0 after sleeping for the indicated amount of time.


@load "time" ... printf "It is now %g seconds since the Epoch\n", gettimeofday() printf "Pausing for a while... " ; sleep(2.5) ; print "done"


GAWK: Effective AWK Programming, filefuncs(3am), fnmatch(3am), fork(3am), inplace(3am), ordchr(3am), readdir(3am), readfile(3am), revoutput(3am), rwarray(3am). gettimeofday(2), nanosleep(2), select(2).


Arnold Robbins, arnold@skeeve.com.


Copyright (C) 2012, 2013, Free Software Foundation, Inc. Permission is granted to make and distribute verbatim copies of this manual page provided the copyright notice and this permission notice are preserved on all copies. Permission is granted to copy and distribute modified versions of this manual page under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one. Permission is granted to copy and distribute translations of this man- ual page into another language, under the above conditions for modified versions, except that this permission notice may be stated in a trans- lation approved by the Foundation. Free Software Foundation Jan 15 2013 TIME(3am)

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