help with unix commands
shulbert at clblf.com
shulbert at clblf.com
Wed Jan 25 10:17:28 CST 2006
there a commandcode variable which stores the return value of the last run command.
<phreference>
The COMMANDCODE function returns information on error messages issued when trying to
execute an operating system command. If the COMMANDCODE function returns an empty
string, then the command returns an exit status of 0.
UNIX
If it's a string in the form "UX-WRN #xxx", the command exits with the status xxxx (in
hexadecimal). If it's of the form #xxxx", the command terminates with a signal, returning status
xxxx (in hexadecimal). If the string is of the form "EXEC-ERR #nnnn", the command cannot be
executed because of a UNIX error number nnn.
</phreference>
i'm getting a null string, though. perhaps bob could tell us how to use it.
good luck,
stephen.
-----Original Message-----
From: David_Williams at westbury-homes.co.uk [mailto:David_Williams at westbury-homes.co.uk] Sent: Wednesday, January 25, 2006 3:54 PM
To: paul_diaconescu at hotmail.com; powerh-l at lists.sowder.com
Subject: RE: help with unix commands
Paul
I don't think you can't get the status without getting into convoluted
saving in the script and accessing in the quick, because the command is
spawned at a lower unix shell level.
But if you just want to decide whether you found abc or not then using
Ole's method should work :
>let cmd_str = "grep abc filexx > /dev/null 2>&1"
>run command cmd_str nowarn on error continue if commandok
> then let abcexists = "true"
> else let abcexists = "false"
(We tend to execute scripts in run command rather than direct command
line, so if I've got syntax problems above, apologies. I've added the
2<&1 to your grep to prevent error messages showing).
David
-----Original Message-----
From:
powerh-l-bounces+david_williams=westbury-homes.co.uk at lists.sowder.com
[mailto:powerh-l-bounces+david_williams=westbury-homes.co.uk at lists.sowde
r.com] On Behalf Of PAUL DIACONESCU
Sent: 25 January 2006 15:24
To: powerh-l at lists.sowder.com
Subject: RE: help with unix commands
Thank-you for your answer.
I do not want to check for the existence of a file.
I want to check for the existence of one or more lines containing 'abc'
on a particular file
The 'grep' command exits with status = 0 if any lines match, 1 if not
and 2 for erreors.
How can I retrieve the exit-status ($?) in the quick program ?
paul diaconescu
>From: "Ole Hansen, ScanConsult" <oh at scanconsult.dk>
>Reply-To: oh at scanconsult.dk
>To: "'PAUL DIACONESCU'" <paul_diaconescu at hotmail.com>, ><powerh-l at lists.sowder.com>
>Subject: RE: help with unix commands
>Date: Wed, 25 Jan 2006 16:11:46 +0100
>
>Paul,
>
>I can't answer your question, but I have a feeling that you wish to
test >for
>existence of af particular file. If my feeling is correct, here is what
we
>do:
>
>let cmd_str = "ls $HOME/filename" ; change to point to correct file
>run command cmd_str nowarn on error continue
>if commandok
> then let fileexists = "1"
> else let fileexists = "0"
>
>... otherwise - sorry for the wasted bandwidth.
>
>Mange hilsner / With kind regards
>
>Ole Hansen
>
>===========================================================
>E-mail: oh at scanconsult.dk Cell Phone: +45 4040 1150
>===========================================================
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>
>-----Original Message-----
>From: powerh-l-bounces+oh=scanconsult.dk at lists.sowder.com
>[mailto:powerh-l-bounces+oh=scanconsult.dk at lists.sowder.com] On Behalf
Of
>PAUL DIACONESCU
>Sent: 25. januar 2006 15:52
>To: powerh-l at lists.sowder.com
>Subject: help with unix commands
>
>quick, on hp unix.
>
>I try to do a <RUN COMMAND "grep 'abc' filexx > /dev/null>
>
>In unix this command exits with a status ($?) = 0, 1 or 2.
>
>How can I retrieve this status ($?) in my quick screen ?
>
>paul diaconescu
>
>
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