Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

/usr/bin/perl -w?

by biochris (Beadle)
on Jun 20, 2005 at 19:53 UTC ( #468472=perlquestion: print w/ replies, xml ) Need Help??
biochris has asked for the wisdom of the Perl Monks concerning the following question:

I try to run a logon perl script on RedHat Workstation 3. When I run a ps -ef I see my script as /usr/bin/perl -w? script_name Anyone knows why I get the question mark after the -w switch? Thank you

Comment on /usr/bin/perl -w?
Re: /usr/bin/perl -w?
by ysth (Canon) on Jun 20, 2005 at 20:33 UTC
    Just at a guess, your script has a CR at the end of the shebang line?
      Thank you so much :)
Re: /usr/bin/perl -w?
by chas (Priest) on Jun 20, 2005 at 21:14 UTC
    And with regard to ysth's reply, I once noted that if my shebang line was #!/usr/bin/perl followed by a carriage return (due to editing the script on a Windows machine and then transferring to Linux), the script exited with an error that the command was not found. (Putting -w at the end of the line fixed the problem, because then the carriage return was ignored as an unknown option, I think.) You can check if the return is there by editing the script in binary mode with vi(m) or emacs, etc.
    chas
        Some people take the approach of creating a "/usr/bin/perl\r" link to /usr/bin/perl :)

        And Unix commands in general, too! Because of shell design and such, typing rm * in a directory which contains a file named -rf could delete everything (except the file -rf)! You should do rm -- * instead. I have actually been bitten by this once or twice, but luckily not by -rf but something more mundane.

      Looks like it worked. thanks so much
Re: /usr/bin/perl -w?
by aditya.singh (Acolyte) on Jun 22, 2005 at 09:36 UTC
    Check you shebang(#!) line. You probably have ^M or some other unprintable character there.
      Yep, that was the problem. Thanks

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: perlquestion [id://468472]
Approved by ikegami
Front-paged by ikegami
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others imbibing at the Monastery: (16)
As of 2015-07-02 17:34 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









    Results (44 votes), past polls