Beefy Boxes and Bandwidth Generously Provided by pair Networks
Your skill will accomplish
what the force of many cannot

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

It is possible to fool $ENV{SHELL} into thinking it's something other than the right answer. So I was going to mention using Proc::ProcessTable or something, combined with $$, to see what your parent process was, and check what that command was, etc., until you found a shell. But two things stop me from actually suggesting it. First, your program may be run from another program from another from the cron daemon, which is owned by init. So there may not be an obvious shell (it's there, but you may not be able to easily find it). Or your parent process may have died, and you got inherited by init.

So, I second the vote on $ENV{SHELL}. If some advanced user wants to fool you into thinking the shell is csh when it's really bash, well, they may actually know what they're doing. Let them. If it's not set, ask that it be set - or have a reasonable fallback, whatever that means to your program.

Although, I have to admit some curiosity - what are you doing that you care what the shell is? The only thing I can think of is that you're printing out a bunch of environment-setting commands, and you want to know whether to "setenv" or "export" them so that a parent shell could say exec ``.

In reply to Re: find the shell inside a perl script by Tanktalus
in thread find the shell inside a perl script by jesuashok

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 How to display code and escape characters are good places to start.
Log In?

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

How do I use this? | Other CB clients
Other Users?
Others scrutinizing the Monastery: (2)
As of 2023-10-03 04:37 GMT
Find Nodes?
    Voting Booth?

    No recent polls found