Re: [bug-inetutils] Shell capabilities.

[Mats Erik Andersson]

måndag den 23 januari 2012 klockan 09:55 skrev Simon Josefsson detta:
> Mats Erik Andersson <address@hidden> writes:
> 
> > lördag den 21 januari 2012 klockan 08:11 skrev Alfred M. Szmidt detta:
> >>    >    BTW, syslogd.sh says #!/bin/sh, but it seems to use non-POSIX
> >>    >    extensions, no?
> >>    >
> >>    > What extentions do are you thinking of exactly?  I couldn't find
> >>    > anything particular
> >> 
> >>    I noticed the $((foo)) construct that, according to the Autoconf
> >>    manual, doesn't work on Solaris 10.  However I thought we had some
> >>    positive success on Solaris?
> >> 
> >> $((FOO)) is in IEEE 1003.1-2004, not sure about earlier.  Maybe
> >> Solaris uses a non-POSIX shell?

[...]

> to care about that platform.  And further, I don't think Solaris support
> is something we should spend a lot of time on if it takes away time to
> work on other improvements that benefits GNU platforms.

Both of GNU/OpenSolaris-NexentaCore (in /sbin/sh) and
OpenIndiana (in /usr/has/bin/sh) provide a SVR4 Bourne
shell for legacy purposes. The issues that arise are

   ## Exit value reversal not available.
   $ ! false
   sh: !: not found

   ## Tilde expansion not provided.
   $ echo ~ftp
   ~ftp

   ## Missing $( ) and $(( )) constructs.
   $ echo $(date)
   syntax error at line 1: ...
   $ echo $((1 + 2))
   syntax error at line 1: ...

   ## Stripped down grep: no "-q", no extended regex.
   $ grep -h
   Usage: grep -hblcnsviw pattern file ...

   ## Defective parameter handling
   $ echo ${10}
   sh: bad substitution
   $ set -- 0 1 2
   $ echo $2
   1
   $ set --
   $ echo $2
   1

Regards,
  Mats