ref: 88ab2978b63f3de29994685a168a1606b8b62e28
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.