Bash scripting

[CataM]

I need some help. I want to create a script to tell me info about all users from a system who logged in in the last month, at least 3 times. I made this over far but I need for all users... To get all users from /etc/passwd not to type them from keyboard... Can someone help me ?Thanks.





if [ $# = 0 ]
then
echo "Enter user: "
else
for i
do
last -3 $i || echo "The user $i never logged in!"
done
fi

[ghostdog74]

awk 'BEGIN{FS=":"}
{
 cmd="last -3 " $1
 while( (cmd | getline result )>0 ) {
   if ( result ~ $1 ) {
    print result
   }
 }
 close(cmd)
}' /etc/passwd