topic Re: Help on Script needed in Operating System - HP-UX

Help on Script needed

Rudi Martin — Fri, 19 Mar 2004 04:09:16 GMT

Hi all

Below is a sample of the script I'm working on. I cannot remember how to do the "no error" bit. Please help.

rcp -p /sdata/files/cptester/r1.txt a646001:/home/amartir/main_unix.txt
IF no error THEN
mailx -s"Copy of Main_Unix to DSA" elit
rm /sdata/files/cptester/r1.txt;;
rcp -p /sdata/files/cptester/r2.txt a646001:/home/amartir/sub_unix.txt
IF no error THEN
mailx -s"Copy of Sub_Unix to DSA" elit
rm /sdata/files/cptester/r2.txt;;

Re: Help on Script needed

Borislav Perkov — Fri, 19 Mar 2004 04:13:59 GMT

Hi,
You can try with:

if [ $? -eq 0 ]

$? is exit error code, and if it is 0 the command properly.

Boris.

Re: Help on Script needed

Sanjay Kumar Suri — Fri, 19 Mar 2004 04:15:24 GMT

if [ $? -eq 0 ]
then
command
fi

sks

Re: Help on Script needed

Graham Cameron_1 — Fri, 19 Mar 2004 04:17:49 GMT

or you can use the double pipe "||" to specify an action to take if the operation fails, eg:
rcp -p /sdata/files/cptester/r1.txt a646001:/home/amartir/main_unix.txt || return 1

mailx -s"Copy of Main_Unix to DSA"

etc

-- Graham

Re: Help on Script needed

Nicolas Dumeige — Fri, 19 Mar 2004 04:21:55 GMT

Beware that r services connot be trusted as for the return code.
rcp return code should be ok, but if're doing rsh, a good idea is to make the remote script display a final OK and the local caller grep this output.

For the test :
if [ $? -eq 0 ] ; then
command
else
other_command
fi

is equivalent to
[ $? -eq 0 ] && command || other_command

Re: Help on Script needed

Borislav Perkov — Fri, 19 Mar 2004 04:25:39 GMT

oops,
Sorry
$? is exit error code, and if it is 0 the command properly ENDED.

Boris

Re: Help on Script needed

Elmar P. Kolkman — Fri, 19 Mar 2004 05:27:42 GMT

I would do this by using not the || but the &&...

rcp -p /sdata/files/cptester/r1.txt a646001:/home/amartir/main_unix.txt && \
mailx -s"Copy of Main_Unix to DSA" elit && \
rm /sdata/files/cptester/r1.txt

The same for the other command.

Or the way mentioned above, using the return code in $? which is 0 (zero) for succesfull commands. You could even do it this way:

if rcp ...
then
mailx ...
rm ...
fi

Re: Help on Script needed

Mark Grant — Fri, 19 Mar 2004 05:30:07 GMT

The simplest way is to use the "&&" operator which will only allow the things on the right of it to run if the thing on the left is succesful.

rcp -p /sdata/files/cptester/r1.txt a646001:/home/amartir/main_unix.txt && mycommand

If "mycommand" needs to be several commands you can put them in braces as in

rcp -p /sdata/files/cptester/r1.txt a646001:/home/amartir/main_unix.txt && {
mailx .....
rm ....
etc ...
}

The opposite of && is ||

Re: Help on Script needed

rvrameshbabu — Mon, 22 Mar 2004 01:24:43 GMT

Note that the remote shell and remote copy commands cannot be trusted for return code

#!/bin/sh
HOST=a646001
rcp -p /sdata/files/cptester/r1.txt $HOST:/home/amartir/main_unix.txt
OK=`remsh $HOST ls /home/amartir/main_unix.txt | wc -l`
if [ "$OK" -eq 1 ]
then
# ur commands
elif
# ur commands
fi

So try the above and make sure copy is done and use the number of files copied as input to ur if statement