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Full Discussion: Discussion: use "/usr/bin/env" or not
Top Forums Shell Programming and Scripting Discussion: use "/usr/bin/env" or not Post 302973161 by Aia on Sunday 15th of May 2016 01:18:43 PM
Old 05-15-2016
Hi drl,

The topic of using env as a _silver bullet_ for portability in the Unices world has been discussed extensively on many forums and a quick search on the Net will produce many of those conversations.

Your experience, certainly, will contribute to how strongly you feel about a particular topic. However, portability is an elusive concept, as much as we would like to believe not so. The classic _it has worked for me for so many years_ or _I have never had a problem with it_ does not produce an assurance of portability, neither. And since this could be a call to _holy war_ for many, I would like to leave it there, on my part.

My original objective was to bring awareness that by using env you might be trading a _minor_ inconvenience (merely the need to know what systems you are coding for) for a whole new set of issues.

Thank you for including my post.
 

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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