Shell Programming and Scripting

I want to edit my /etc/security/user, But they are so many.
For example for my user : a1,a2,a3
i want to add this text.

loginretries = 0
minalpha = 0
minlen = 0
minage = 0

For example.
a1:
admin = false

sysad:
login = false
rlogin = false
admin = false
account_locked = true
loginretries = 5

a2:
admin = false

a3:
admin false


OUTPUT:

will look like this


a1:
admin = false
loginretries = 0
minalpha = 0
minlen = 0
minage = 0

sysad:
login = false
rlogin = false
admin = false
account_locked = true
loginretries = 5

a2:
admin = false
loginretries = 0
minalpha = 0
minlen = 0
minage = 0

a3:
admin false
loginretries = 0
minalpha = 0
minlen = 0
minage = 0

Try this:

Code:

awk '
BEGIN{t="loginretries = 0\nminalpha = 0\nminlen = 0\nminage = 0"}
/^a1:/||/^a2:/||/^a3:/{print;getline;print $0 "\n" t;next}
1' file > newfile

Regards

awk '
BEGIN{t="loginretries = 0\nminalpha = 0\nminlen = 0\nminage = 0"}
/^a1:/||/^a2:/||/^a3:/{print;getline;print $0 "\n" t}
' file > newfile

what if i wont declare them on that statement. there are lot of accouts? I want to put it in a file. like

$cat list1.txt
a1
a2
a3

How to do it?

Code:

awk '
BEGIN{t="loginretries = 0\nminalpha = 0\nminlen = 0\nminage = 0"}
NR==FNR{a[$0]=$0;next}
{s=$0;sub(":","",s)}
a[s]{print;getline;print $0 "\n" t;next}
1' list1.txt /etc/security/user

Regards