Mail Archives: cygwin/2002/08/06/12:43:27
Hello,
Note: This is NOT a Perl question.
I use Cygwin ocassionally on my WIN2K workstation to develop and run Perl
scripts that I use for network testing. I have one script that uses the
Net::Ping module that I'm having some trouble with because it fails saying
it requires root privilege as shown below.
icmp ping requires root privilege at ./sd_ping.pl line 48
Examination of the module reveals that all it's looking for is an effective
UID of 0 (and the OS is not VMS).
croak("icmp ping requires root privilege") if ($> and $^O ne 'VMS');
I can remove this line from the module and then my script works, but I'd
rather not hack the module. It seems like I should be able to establish the
correct EUID by changing the ownership of the script to UID 0 and setting
the setuid bit. But chown doesn't seem to do anything. It doesn't
complain, it just doesn't change the ownership. I am trying to do this
logged into WIN2K with my domain account which is part of the administrators
group. My passwd and group files were created with mkpasswd -l >
/etc/passwd and mkgroup -l > /etc/group.
Then I thought I could create a root user as below and use login to become
root.
root:*:0:0:Administrators group,S-1-5-32-544:/:/bin/bash
But login fails to authenticate me if I enter
login root
and give my domain password.
Then I tried taking the Administrator passwd file entry created by mkpasswd
and replaced the UID and GID generated by mkpasswd with 0:0. Login still
failed to authenticate me.
Just to see if login works at all I created another local user using Windows
Computer Management and then reran mkpasswd -l. Then I tried to login as
that user. No go. Still failed to authenticate. What am I missing here?
As a last resort I changed the UID:GID fields in my password file entry
associated with my domain account to 0:0. Since that's the account I'm
logged into when I start a cygwin session, that should set my UID correctly.
My script works in this environment, but now every time I start a cygwin
shell I'm running as 0:0 which may have other side effects.
Any suggestions on how to handle this cleanly would be appreciated. I'm
running WIN2K-SP2 and cygwin-1.1.8-2
Thanks.
--Dave
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