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BarsMonster
Asked: 2010-08-20 03:30:04 +0800 CST

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

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I am migrating from AIX to Solaris 10, but the version of /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 A LOT of places with system calls, so changing them in every place is not very feasible. It would be great to find some global setting or something.

perl shell solaris-10

4 Answers

  1. Best Answer

    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});
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  2. See this thread on Stack Overflow.

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  3. 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.

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  4. 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

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