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Top Forums Shell Programming and Scripting Time in seconds on AIX 4.3.2.0 Post 302992575 by bakunin on Monday 27th of February 2017 12:23:32 PM
Old 02-27-2017
Quote:
Originally Posted by Don Cragun
The date +%T output gives you hours, minutes, and seconds (on a 24 hour clock) since midnight in the current timezone. The desired date +%s (which is not available on many UNIX systems, including AIX) gives you seconds since the Epoch (midnight at the start of January 1, 1970 UCT).
I am well aware of the difference between epoch time and seconds since midnight. I was (see post #1) - and perhaps erroneously so - convinced that thread-o/p was looking for the seconds since midnight ("time in seconds"), not the epoch (from which the seconds since midnight can be derived too, with some effort). So i offered this as a perceived shortcut.

date +'%s' is, btw., available on (a recent) AIX, but probably not on AIX 4.3.2 (which, IIRC, should be around 1997 or 1998).

bakunin

Last edited by bakunin; 02-27-2017 at 01:28 PM..
 

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FTIME(3)						     Linux Programmer's Manual							  FTIME(3)

NAME
ftime - return date and time SYNOPSIS
#include <sys/timeb.h> int ftime(struct timeb *tp); DESCRIPTION
Return current date and time in tp, which is declared as follows: struct timeb { time_t time; unsigned short millitm; short timezone; short dstflag; }; Here time is the number of seconds since the epoch, millitm is the number of milliseconds since time seconds since the epoch, timezone is the local time zone measured in minutes of time west of Greenwich, and dstflag is a flag that, if nonzero, indicates that Daylight Saving time applies locally during the appropriate part of the year. These days the contents of the timezone and dstflag fields are undefined. RETURN VALUE
This function always returns 0. BUGS
This function is obsolete. Don't use it. If the time in seconds suffices, time(2) can be used; gettimeofday(2) gives microseconds; clock_gettime(3) gives nanoseconds but is not yet widely available. Under libc4 and libc5 the millitm field is meaningful. But early glibc2 is buggy and returns 0 there; glibc 2.1.1 is correct again. HISTORY
The ftime() function appeared in 4.2BSD. CONFORMING TO
BSD 4.2, POSIX 1003.1-2001. SEE ALSO
gettimeofday(2), time(2) Linux 2001-12-14 FTIME(3)
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