> I'm not sure if XPG4v2 requires command substitution to behave
> like that. At least, both Solaris' and DEC UNIX... oops...
> True64 UNIX do execute all command substitutions in a subshell
> (`pwd` does not affect the surrounding shell), and both claim
> XPG4 compliance.
They only execute a subshell when they need to:
$ echo $$ `echo $$`
14405 14405
$ uname -a
SunOS molotov.boi.ie 5.6 Generic_105181-05 sun4u sparc SUNW,Ultra-5_10
Regards,
Niall
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