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Full Discussion: To learn last login date
Top Forums Shell Programming and Scripting To learn last login date Post 302961060 by MadeInGermany on Monday 23rd of November 2015 12:00:28 PM
Old 11-23-2015
SysV Unix does not store the year in wtmp.
Most if not all Unix vendors have migrated to own extended wtmp files, named wtmpx or wtmps.
When adapting the last command, some vendors added new non-standard options.
Here is a portable script that makes some guesses and tries to compute the missing year:
Code:
last | PATH=/usr/xpg4/bin:/bin:/usr/bin awk '
BEGIN {
m["Jan"]=1
m["Feb"]=2
m["Mar"]=3
m["Apr"]=4
m["May"]=5
m["Jun"]=6
m["Jul"]=7
m["Aug"]=8
m["Sep"]=9
m["Oct"]=10
m["Nov"]=11
m["Dec"]=12
}
{
for (i=4;i<NF;i++) {
  if (($(i-1) in m) && $i~/^[0-9]?[0-9]$/ && $(i+1)~/^[0-9]/) {
    if ((m[$(i-1)]>pm || m[$(i-1)]==pm && $i>pday) && NR>1) year--
    pm=m[$(i-1)]; pday=$i
    $i=$i " " year
    break
  }
}
print
}' year=`date +%Y`

This User Gave Thanks to MadeInGermany For This Post:
getrue
 

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LEARN ABOUT SUNOS

sulog

sulog(4)							   File Formats 							  sulog(4)

NAME

       sulog - su command log file

SYNOPSIS

       /var/adm/sulog

DESCRIPTION

       The  sulog file is a record of all attempts by users on the system  to execute the su(1M) command.  Each time  su(1M) is executed, an entry
       is added to the sulog file.

       Each entry in the sulog file is a single line of the form:

	      SU date time
	      result port user-newuser

       where

       date	       The month and date su(1M) was executed.	date is displayed in the form  mm/dd where  mm is the month number and dd  is  the
		       day number in the month.

       time	       The  time   su(1M) was executed. time is displayed in the form  HH/MM where  HH is the hour number (24 hour system) and	MM
		       is the minute number.

       result	       The result of the  su(1M) command.  A ` + ' sign is displayed in this field if the su attempt was successful; otherwise	 a
		       ` - ' sign is displayed.

       port	       The name of the terminal device from which  su(1M) was executed.

       user	       The user id of the user executing the  su(1M) command.

       newuser	       The user id being switched to with  su(1M).

EXAMPLES

       Example 1: A sample sulog file.

       Here is a sample sulog file:

       SU 02/25 09:29 + console root-sys
       SU 02/25 09:32 + pts/3 user1-root
       SU 03/02 08:03 + pts/5 user1-root
       SU 03/03 08:19 + pts/5 user1-root
       SU 03/09 14:24 - pts/5 guest3-root
       SU 03/09 14:24 - pts/5 guest3-root
       SU 03/14 08:31 + pts/4 user1-root

FILES

       /var/adm/sulog	       su log file

       /etc/default/su	       contains the default location of  sulog

SEE ALSO

       su(1M)

SunOS 5.10							    6 Jun 1994								  sulog(4)
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