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Home: Perl Programming Help: Beginner:
#!/usr/bin/perl -U


New User

Apr 30, 2009, 5:42 AM

Post #1 of 2 (601 views)
#!/usr/bin/perl -U Can't Post

I have inherited the support of a script.

It contains the following line at the top of the script:

#!/usr/bin/perl -U

I know what #!/usr/bin/perl is for.

However, I don't know what the -U switch is for.

Does anyone know?


Veteran / Moderator

Apr 30, 2009, 5:55 AM

Post #2 of 2 (599 views)
Re: [script123] #!/usr/bin/perl -U [In reply to] Can't Post

You should read the whole doc, but here's part of it.


allows Perl to do unsafe operations. Currently the only "unsafe" operations are attempting to unlink directories while running as superuser, and running setuid programs with fatal taint checks turned into warnings. Note that the -w switch (or the $^W variable) must be used along with this option to actually generate the taint-check warnings.


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