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Top Forums Shell Programming and Scripting Shell Script for Epoch Time Conversion Post 302610965 by hedkandi on Thursday 22nd of March 2012 04:34:02 AM
Old 03-22-2012
Shell Script for Epoch Time Conversion

Hi there

I came across this script online to convert Epoch time to proper date format, but I am receiving the following error

Also, I have HISTTIMEFORMAT set in user's .profile so that their history output shows time stamps. Additionally I have changed their .history location to a dedicated directory in /var/log. Example as below:

Code:
export HISTFILE=/var/log/user_history/JP1_history

export HISTFILESIZE=20000

export HISTSIZE=5000

export HISTTIMEFORMAT="%F %T "

This is the error message from the script:

Code:
[root@H99A100 user_history]# ./test
Month '23' out of range 0..11 at -e line 2

This is the script I am using:

Code:
#!/bin/bash
# YYYY MM DD HH MM SS
# perl autosplits the string and uses timelocal to return
# the number of seconds from the Epoch
# No error checking!
function seconds_from_epoch {
echo $*| perl -MTime::Local -ane '
my $epochseconds = timelocal($F[5], $F[4], $F[3], $F[2], $F[1], $F[0]);
print "$epochseconds\n"; '
}

# parse file s32adm_bash_history date and time
set - $(ls -l s32adm_bash_history)
fdate=$6
ftime=$7

# parse the year, month, and day
set - $(IFS="-"; echo $fdate)
fyear=$1
fmonth=$2
fday=$3

# parse the hours and minutes
set - $(IFS=":"; echo $ftime)
fhour=$1
fmin=$2

totsecs=$(seconds_from_epoch "$fyear $fmonth $fday $fhour $fmin 0")
echo $totsecs

Can someone please point out what I am doing wrong?
 

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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
This function returns the current time as seconds and milliseconds since the Epoch, 1970-01-01 00:00:00 +0000 (UTC). The time is returned 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, and millitm is the number of milliseconds since time seconds since the Epoch. The timezone field is the local timezone measured in minutes of time west of Greenwich (with a negative value indicating minutes east of Green- wich). The dstflag field is a flag that, if nonzero, indicates that Daylight Saving time applies locally during the appropriate part of the year. POSIX.1-2001 says that the contents of the timezone and dstflag fields are unspecified; avoid relying on them. RETURN VALUE
This function always returns 0. (POSIX.1-2001 specifies, and some systems document, a -1 error return.) ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7). +----------+---------------+---------+ |Interface | Attribute | Value | +----------+---------------+---------+ |ftime() | Thread safety | MT-Safe | +----------+---------------+---------+ CONFORMING TO
4.2BSD, POSIX.1-2001. POSIX.1-2008 removes the specification of ftime(). 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(2) gives nanoseconds but is not as widely available. BUGS
Early glibc2 is buggy and returns 0 in the millitm field; glibc 2.1.1 is correct again. SEE ALSO
gettimeofday(2), time(2) COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/. GNU
2017-09-15 FTIME(3)
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