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TIME(3am)                   GNU Awk Extension Modules                  TIME(3am)


       time - time functions for gawk


       @load "time"

       time = gettimeofday()
       ret = sleep(amount)
       timeval = strptime(string, format)


       The time extension adds three functions named gettimeofday() sleep(), and
       stptrime(), as follows.

              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.

              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.

              This function takes two arguments, a string representing a date
              and time, and a format string describing the data in the string.
              It calls the C library time(3) function with the given values.
              If the parsing succeeds, the results are passed to the C library
              time(3) function, and its result is returned, expressing the
              time in seconds since the epoch in the current local timezone,
              regardless of any timezone specified in the string arguments.
              (This is the same as gawk's built-in time(3) function.)
              Otherwise it returns -1 upon error. In the latter case, ERRNO
              indicates the problem.


       The underlying time(3) C library routine apparently ignores any time
       zone indication in the date string, producing values relative to the
       current time zone.  It might be better to have this routine return a
       string similar to what gawk's time(3) function expects, but we ran out
       of energy.


       @load "time"
       printf "It is now %g seconds since the Epoch\n", gettimeofday()
       printf "Pausing for a while... " ; sleep(2.5) ; print "done"
       format = "%b %d %H:%M:%S %Z %Y"
       now = systime()
       print now, "<" (result = strftime(format, now)) ">",
       then = strptime(result, format)
       print strftime(format, then)


       GAWK: Effective AWK Programming, filefuncs(3), fnmatch(3), fork(3),
       inplace(3), ordchr(3), readdir(3), readfile(3), revoutput(3),



       Arnold Robbins,


       Copyright (C) 2012, 2013, 2018, 2022, 2023, Free Software Foundation,
       Copyright (C) 2019, Arnold David Robbins.

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Free Software Foundation           Jan 16 2023                         TIME(3am)

gawk 5.2.2 - Generated Wed May 10 15:34:56 CDT 2023
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