Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change
 
PerlMonks  

Re: The problem of "the" default shell

by haukex (Archbishop)
on Dec 09, 2017 at 13:56 UTC ( [id://1205218]=note: print w/replies, xml ) Need Help??


in reply to The problem of "the" default shell

Excellent post, thank you very much for this! Bookmarked :-)

Did you notice that qx() and its shorter alias `` don't support a list form?

IPC::System::Simple provides the function capturex as a replacement for qx that always avoids the shell*.

IPC::Run3 is another good module that will avoid the shell* if you give it an arrayref. The more advanced IPC::Run, although its documentation does not mention this, will also use the exec {...} ... form, although I haven't yet fully traced back in how many cases this is used - it's not always.

I wrote a post in a similar vein to yours showing example code with these modules here.

* Does not apply on Windows, but I have heard good things about Win32::ShellQuote, which recent versions of IPC::Run3 use internally. On *NIX systems and others with execvp(3), the above should always completely avoid the shell.

Update 2: Cleaned up formatting and wording.

(Side note: I don't normally both front-page and reply to a node, but I feel this is an important topic.)

Log In?
Username:
Password:

What's my password?
Create A New User
Domain Nodelet?
Node Status?
node history
Node Type: note [id://1205218]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this?Last hourOther CB clients
Other Users?
Others exploiting the Monastery: (7)
As of 2024-03-28 22:03 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found