Re: Non-shell-invoking system/exec and qx//

Opening '-|' can take a list argument, so here's a substitute for backticks and readpipe given by ikegami in the thread CLASSPATH problem when using backticks:

sub backticks {
  open(my $pipe, '-|', @_)
     or return;
  local $/ = wantarray ? $/ : undef;
  <$pipe>
}
[download]

Note that a shell could still get invoked if @_ == 1 and the first element contains shell metacharacters.

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Re^2: Non-shell-invoking system/exec and qx// by ikegami (Patriarch) on Jun 18, 2008 at 14:38 UTC
Note that a shell could still get invoked if @_ == 1 and the first element contains shell metacharacters. Good point. And rather unfortunate. Many commands accept '--' as an argument to signify the end of the command line switches. You could pass that if you're executing such a program. `backticks('ls foo'); # Run "ls" with argument "foo" backticks('ls foo', '--'); # Run "ls foo" with argument "--"` [download]	[reply] [d/l]
Re^2: Non-shell-invoking system/exec and qx// by ikegami (Patriarch) on Jul 17, 2008 at 19:28 UTC
IPC::System::Simple is an alternate solution that doesn't suffer from that bug. Update: Oops, didn't notice it was already mentioned below.	[reply]