Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I have found this works quite well as a work-around.

Wrap all calls to perl into a binary that is SUID. At the top of any script needing to go suid, put something like:

  #!/bin/sh
     eval 'exec /usr/local/bin/perlwrap $0 {$1+"$@"}'
     if 0;
where /usr/local/bin/perlwrap has the SUID bit correctly set. The name the script was actually called as ( including the path component ) and all the remaining command line arguments are sent to the wrapper as arguments. The wrapper does the SUID stuff and then runs the script, passing along the arguments. Since the script itself was never SUID, you don't get the file descriptor problem.

You can then use a special ID to control which scripts can and cannot go SUID. Basically, if the script isn't owned by the special ID the permissions get reset to the user's before the script is run.

If you need more help, email me and I will do what I can.

HTH,
Mik Firestone ( perlus bigotus maximus )


In reply to Re: How to determine the program path from a set-uid program by mikfire
in thread How to determine the program path from a set-uid program by ZZamboni

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others contemplating the Monastery: (3)
As of 2022-08-20 00:01 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found

    Notices?