How to force Perl use /bin/ksh instead of /bin/sh?

Question

I am migrating from AIX to Solaris 10 /bin/sh there is so old, that our scripts does not work. Can I somehow force perl to execute commands in `` via different shell (in my case, /bin/ksh)?

I have ALOT of places with system calls, so changing em in every place is not very nice. It would be great to find some global setting or something.

Answer 1

To get a POSIX environment on Solaris, you need to put the standard conformance directory (/usr/xpg6/bin, the number can be different in different Solaris versions) early in your PATH, before /usr/bin or /bin. There is a POSIX-conforming sh in there (it's ksh, in fact), and a few utilities react differently depending on $PATH even though they come in a single executable.

Either hard-code the directories:

my @xpg_dirs = glob('/usr/xpg[0-9]/bin /usr/xpg[0-9][0-9]/bin');
$ENV{PATH} = "$xpg_dirs[@xpg_dirs-1]:$ENV{PATH}" if @xpg_dirs;

or impose a standard PATH with getconf (which oddly enough isn't in the POSIX module):

$ENV{PATH} = `getconf PATH`;
chomp($ENV{PATH});

Answer 2

See this thread on Stack Overflow.

Answer 3

A thought that may help:

Can you update /bin/sh to the same version that was on your old AIX server where these previously worked. The perl behavior has not changed, just your version of /bin/sh

Answer 4

You can use shebang like this

#!/bin/ksh

add/repalce the above at the first line of script. It uses the /bin/ksh to execute the script.