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Operating Systems AIX xx=`date +"%a %b %d"`;rsh xxx grep "^$XX" zzz ? Post 302325169 by Browser_ice on Saturday 13th of June 2009 08:39:49 AM
Old 06-13-2009
Quote:
Originally Posted by bakunin
The reason for your problem is the command evaluation process in ksh. You might want to read what i have written for a different (but related) problem here.

Your commandline is first interpreted locally and the content of the variable is filled in and protected by the double quotes. Now a remote connection is opened and the rest of the line is passed as command line to the remote shell interpreter. Guess what? At the remote site the commandline is getting interpreted *again* and now the double quotes are not there any more because they are already "used". The command will look like this (first line=local, second line=remote):

Code:
rsh host grep ^Sat Jun 13 06:19:07 CEST 2009 file
              --------one argument-----
grep ^Sat Jun 13 06:19:07 CEST 2009 file

And of course "grep" will try to find "^Sat" is a file called "Jun", which leads to the error.

The solution is to protect your double quotes by escaping them:

Code:
rsh host grep "\"$xx\"" file

I hope this helps.

bakunin
It worked !

Thank you.
 

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xon(1X) 																   xon(1X)

NAME
xon - start an X program on a remote machine SYNOPSIS
xon remote-host [-access] [-debug] [-name window-name] [-nols] [-screen screen-no] [-user user-name] [command...] OPTIONS
Note that the options follow the remote host name (as they do with rlogin). Runs xhost locally to add the remote host to the host access list in the X server. This will not work unless xhost is given permission to modify the access list. Normally, xon disconnects the remote process from stdin, stdout and stderr to eliminate the daemon processes which usually connect them across the network. Specifying the -debug option leaves them connected so that error messages from the remote execution are sent back to the originating host. This specifies a different application name and window title for the default command (xterm). Normally xon passes the -ls option to the remote xterm; this option suspends that behaviour. This changes the screen number of the DISPLAY variable passed to the remote command. By default, xon simply uses rsh/remsh/rcmd to connect to the remote machine using the same user name as on the local machine. This option cause xon to specify an alternative user name. This will not work unless you have authorization to access the remote account, by placing an appropriate entry in the remote users file. DESCRIPTION
The xon program runs the specified command (default xterm -ls) on the remote machine using rsh, remsh, or rcmd. xon passes the DISPLAY, XAUTHORITY and XUSERFILESEARCHPATH environment variables to the remote command. When no command is specified, xon runs 'xterm -ls'. It additionally specifies the application name to be 'xterm-remote-host' and the win- dow title to be 'remote-host'. xon can only work when the remote host will allow you to log in without a password, by having an entry in the file permitting access. BUGS
xon can get easily confused when the remote-host, user-name or various environment variable values contain white space. xon has no way to send the appropriate X authorization information to the remote host. xon(1X)
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