Re: solaris "nawk" fixes edit-pr awk: syntax error

[Mel Hatzis]

Milan Zamazal wrote:
> > > > > > "dm" == doug mildram <address@hidden> writes:
>
>     dm> MINOR suggestion: no harm in littering /tmp with epNNNN files.
>     dm>      around line 120 in edit-pr I'm changing
>     dm> #trap 'rm -f $new $new.old $change_msg $fixfil ; exit 0' 0
>     dm>                                     changing to
>     dm> trap 'rm -f       $new.old $change_msg $fixfil ; exit 0' 0
>
> Thanks for the suggestion.  It's a good idea, but I removed $new only
> from the second trap (error signals).
>
> Frankly, I don't know what `trap ... 0' is (no /bin/sh manual here
> around).  If any /bin/sh guru knows, please enlighten me.

The 'trap' command as used above basically let's the shell perform
an action (in this case the 'rm') when it exits - using '0' as the
second argument means the trap is executed for both normal exits as
well as interrupts.

The use of single quotes means variable and command substitution
of the command is done when the trap is executed rather than when
the trap is set.

An excellent resource for additional information is O'Reilly's
'Unix Power Tools' by Peek, O'Reilly and Loukides.

>     dm> MAJOR FIX: for solaris  diff-prs   ....change awk to nawk.
>
> Well, there sometimes occur Solaris compatibility bugs.  They are
> usually unpleasant bugs, since they occur only on certain Solaris
> versions.  I am sorry, but I rather spend my spare time fixing bugs
> present on free systems (such as GNU/Linux, GNU/HURD or free versions of
> BSD), I hope you understand it.  If someone submits reasonable
> compatibility patches, I'll incorporate it, of course.

Perhaps you could conditionally set an 'awk' variable based on
the output of 'uname -sr' in this case.

--
Mel Hatzis
Juniper Networks, Inc.