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Full Discussion: Ambiguous output redirect in xterm
Top Forums Shell Programming and Scripting Ambiguous output redirect in xterm Post 302903864 by Exitalterego on Friday 30th of May 2014 06:52:45 AM
Old 05-30-2014
Ambiguous output redirect in xterm
Hi all,

I've been working on a bash script to help with backups that I have to do at work.

One of the lines in the script is supposed to launch an xterm, log into a specific server node and launch a tar backup to tape. This part works ok, but I've been trying to get stdout and stderr to display in the xterm and output to a log file using tee.

To this end, this is my current code:
Code:
xterm -hold -e "rsh amaqc01 tar -cvML471859200 -f amatap0"$tape_nd":/dev/st"$tape_dr" /dir1/dir2 2>&1 | foo/bar.txt" &

When the script launches this though, the xterm presents an 'Ambiguous output redirect' error.

I suspect that this is actually due to the system using csh as the default shell such that the xterm is actually running csh rather than bash.

I've tried
Code:
xterm -hold -e "bash; rsh amaqc01"

to fix this but this seems to end up opening the xterm, running the rsh and THEN running bash.

So I guess my question is, what am I missing? Is it even possible to achieve what I'm trying and if so, how?

Thanks in advance
 

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LEARN ABOUT SUSE

xon

XON(1)							      General Commands Manual							    XON(1)

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 ...]

DESCRIPTION

       Xon 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 '-fIremote-host'.

       Xon  can  only  work  when  the	remote host will allow you to log in without a password, by having an entry in the .rhosts file permitting
       access.

OPTIONS

       Note that the options follow the remote host name (as they do with rlogin).

       -access
	      Runs xhost locally to add the remote host to the host access list in the X server.  This won't work unless xhost is given permission
	      to modify the access list.

       -debug 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.

       -name window-name
	      This specifies a different application name and window title for the default command (xterm).

       -nols  Normally xon passes the -ls option to the remote xterm; this option suspends that behaviour.

       -screen screen-no
	      This changes the screen number of the DISPLAY variable passed to the remote command.

       -user user-name
	      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 .rhosts file.

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.

X Version 11							   scripts 1.0.1							    XON(1)
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