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Full Discussion: Solaris Shell Scripting
Operating Systems Solaris Solaris Shell Scripting Post 302995557 by MadeInGermany on Friday 7th of April 2017 12:49:05 PM
Old 04-07-2017
sh,ksh,bash login shell? Put the following to the user's .profile
Code:
logins=`\who -u | \awk '$1==u&&$NF!~/^\(?:[0-9]+\..\)?$/{++s}END{print s+0}' u="$USER"`
[ $logins -gt 1 ] && exec echo "user already logged in"

tcsh,csh login shell? Put the following to the user's .login
Code:
set logins=`\who -u | \awk '$1==u&&$NF!~/^\(?:[0-9]+\..\)?$/{++s}END{print s+0}' u="$USER"`
if ( $logins > 1 ) exec echo "user already logged in"

 

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LEARN ABOUT OPENSOLARIS

listusers

listusers(1)							   User Commands						      listusers(1)

NAME

       listusers - list user login information

SYNOPSIS

       listusers [-g groups] [-l logins]

DESCRIPTION

       Executed without any options, this command lists all user logins sorted by login. The output shows the login ID and the account field value
       from the system's password database as specified by /etc/nsswitch.conf.

OPTIONS

       The following options are supported:

       -g groups    Lists all user logins belonging to group, sorted by login. Multiple groups can be specified as a comma-separated list.

       -l logins    Lists the user login or logins specified by logins, sorted by login. Multiple logins can be  specified  as	a  comma-separated
		    list.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------------------------------------+
       |ATTRIBUTE TYPE		      ATTRIBUTE VALUE		   |
       |Availability		      SUNWcsu			   |
       +-----------------------------------------------------------+

SEE ALSO

       nsswitch.conf(4), attributes(5)

NOTES

       A user login is one that has a UID of 100 or greater.

       The -l and -g options can be combined. User logins will only be listed once, even if they belong to more than one of the selected groups.

SunOS 5.11							    18 Mar 1994 						      listusers(1)
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