ref: 66f3f58a03578914ba97a7aa3862bacfa0bd00df
dir: /changeblog/1596011563.ms/
.HTML Restrict RCPU User Access to Groups
.TL
Restrict RCPU User Access to Groups
.LP
This is how to restrict user access to groups.
You can use this to enable
.CW rcpu
access for all users of a specific group.
All other groups will not be allowed.
.LP
To allow access only to
.CW sys
group members: adjust your
.CW /rc/bin/service/tcp17019
.IP
.CW
#!/bin/rc
.br
userfile=/adm/users
.br
fn useringroup{
.br
grep $1 $userfile | {
.br
found=0
.br
while(~ $found 0 && line=`:{read}){
.br
if(~ $line(2) $2){
.br
found=1
.br
}
.br
}
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if(~ $found 1)
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status=''
.br
if not
.br
status='not found'
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}
.br
}
.br
if(~ $#* 3){
.br
netdir=$3
.br
remote=$2!`{cat $3/remote}
.br
}
.br
fn server {
.br
~ $#remote 0 || echo -n $netdir $remote >/proc/$pid/args
.br
rm -f /env/'fn#server'
.br
. <{n=`{read} && ! ~ $#n 0 && read -c $n} >[2=1]
.br
}
.br
exec tlssrv -a /bin/rc -c 'useringroup $user sys && server'
.LP
This checks if the user is in group
.CW sys
and only then calls the
.CW server
function.
Otherwise the connection is terminated.
.LP
This is especially useful if you want a CPU server to expose filesystems
.I and
have cpu access for administrators only.