Shell Programming and Scripting

Hi,

Need some help here on a script I'm writing. I know that STDERR is normally done is this manner:

script 2>stderr.out

However, if I wanted to output the stderr from a rsh command how do I do that?

Example:

su - username -c "rsh $hostname /opt/gilberteu/scriptname" 1>stdout 2>stderr

If the scriptname doesn't exist, an error will be shown on the screen instead of it going to the stderr file.

Any ideas?

I think I found an alternative:

su - username -c "rsh $hostname /opt/gilberteu/scriptname 2>stderr" 1>stdout

This will clear your douts

1> filename #Redirect stdout to file "filename"
1>>filename #Redirect and append stdout to file "filename"
2> filename #Redirect stderr to file "filename"
2>>filename ##Redirect and append stderr to file "filename"
&> filename ##Redirect both stderr and stdout to file "filename"

The last syntax is not recognized by KSH.
To redirect both stderr and stdout to file "filename", the syntax is :
1>filename 2>&1 or
>filename 2>&1


Jean-Pierre.

Thanks for the response.

I think my alternative works but I am just curious if there's any there is any other way to go about it by NOT creating a stderr file on the remote host.

"rsh $hostname /opt/gilberteu/scriptname 2>stderr" creates the stderr on the remote host instead of the host from where I'm running the rsh from. I wanted the stderr on my local host.

Any ideas?

since STDERR is sent to the screen by the shell and since the error will be on the remote host, redirecting the output of the rsh command to a file should get you what you want ...

Code:

rsh $hostname "/opt/gilberteu/scriptname" > /locdir/locfile

or

Code:

rsh $hostname "cd /remdir; ls -ld remfile" | tee /locdir/locfile

in both cases, you don't need to redirect STDERR to /locdir/locfile because you are not trying to capture the STDERR from the rsh command ... unless you felt like it ...


good luck!