Re: When scripting, which is better?

Sorry guys,

I didn't realise I actually sent this, it was part of an email I was
putting together to achieve consistency in the scripts, but I thought I
cancelled it when it got late in the morning.

My apologies.

Regards and best wishes,

Justin Clift

Bruce Momjian wrote:
>
> > Hi all,
> >
> > Reading through the script files again, there seems to be several
> > different methods of doing the same thing :
> >
> > i.e. if [ -x "$self_path/postmaster" ] && [ -x "$self_path/psql" ];
> > then
>
> The above semicolon is useless. Actually, I have never see this. The
> normal way is:
>
> if [ -x "$self_path/postmaster" -a -x "$self_path/psql" ]
>
> >
> > or
> >
> > if [[ -x "$self_path/postmaster" && -x "$self_path/psql" ]]; then
>
> I usually do:
>
> if [ ... ]
> then
>
> Pretty simple.
>
> >
> >
> >
> >
> > if [ x"$foo" = x"" ]; then
> >
> > or
> >
> > if [ "$op" = "" ]; then
>
> This is done if you think $op may have a leading dash.
>
> >
> > or
> >
> > if [ "$foo" ]; then
> >
>
> This tests whether "$foo" is not equal to "".
>
> --
> Bruce Momjian | http://candle.pha.pa.us
> pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
> + If your life is a hard drive, | 830 Blythe Avenue
> + Christ can be your backup. | Drexel Hill, Pennsylvania 19026

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