Re: how does qx select a "/bin/sh equivalent"?

To see what Perl uses,

$ perl -le'use Config; print $Config{sh}'
/bin/sh
[download]

But note that on many systems, /bin/sh is bash.

$ /bin/sh -c 'echo $SHELL'
/bin/bash
[download]

If you want to use an alternate shell,

sub backticks_mysh {
  open(my $pipe, '-|', '/bin/mysh', '-c', $_[0])
     or return;
  local $/ = wantarray ? $/ : undef;
  <$pipe>
}
[download]

Comment on Re: how does qx select a "/bin/sh equivalent"? Select or Download Code

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Re^2: how does qx select a "/bin/sh equivalent"? by gnujsa (Acolyte) on Jul 30, 2012 at 00:40 UTC
Ok, it was some time ago, but I do not think that the $SHELL variable is reliable. look at my `$ /bin/sh -c 'echo $SHELL' /bin/bash` [download] although: $ file /bin/sh /bin/sh: symbolic link to `dash' [download] and, `$ file /bin/dash /bin/dash: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), d +ynamically linked (uses shared libs), for GNU/Linux 2.6.26, BuildID[s +ha1]=0x890a514bd261794a6d39da58ea2372fdf48e98d6, stripped` [download] I don't really know why. Maybe DASH keeps the environment of the calling shell, but I do not trust $SHELL.	[reply] [d/l] [select]
Re^3: how does qx select a "/bin/sh equivalent"? by ikegami (Patriarch) on Sep 17, 2012 at 05:25 UTC
I used `$SHELL` to demonstrate that `/bin/sh` is not always the bourne shell. I don't see how your reply relates.	[reply] [d/l] [select]