In sh, is '[' a portable synonym for 'test'?

[John Ruschmeyer]

>From: guy at sun.uucp (Guy Harris)
>Message-ID: <2887 at sun.uucp>
>Organization: Sun Microsystems, Inc.
>
>V7 systems where /bin/[ isn't a link to /bin/test.  Any V7 or post-V7 system
>can be made to support "if [ <condition> ]" as equivalent to "if test
><condition>", but the S5 manual properly warns you that not all systems have
>been made to support it.  If you want to make something portable, and you
>don't think you can convince every recipient of the program to make that
>link, you're best off not using "[ ... ]".

Any good reason *NOT* to make the link?


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