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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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RESIZE(1)						      General Commands Manual							 RESIZE(1)

NAME
resize - set TERMCAP and terminal settings to current xterm window size SYNOPSIS
resize [ -u | -c ] [ -s [ row col ] ] DESCRIPTION
Resize prints a shell command for setting the TERM and TERMCAP environment variables to indicate the current size of xterm window from which the command is run. For this output to take effect, resize must either be evaluated as part of the command line (usually done with a shell alias or function) or else redirected to a file which can then be read in. From the C shell (usually known as /bin/csh), the follow- ing alias could be defined in the user's .cshrc: % alias rs 'set noglob; eval `resize`' After resizing the window, the user would type: % rs Users of versions of the Bourne shell (usually known as /bin/sh) that don't have command functions will need to send the output to a tempo- rary file and then read it back in with the "." command: $ resize > /tmp/out $ . /tmp/out OPTIONS
The following options may be used with resize: -u This option indicates that Bourne shell commands should be generated even if the user's current shell isn't /bin/sh. -c This option indicates that C shell commands should be generated even if the user's current shell isn't /bin/csh. -s [rows columns] This option indicates that Sun console escape sequences will be used instead of the VT100-style xterm escape codes. If rows and columns are given, resize will ask the xterm to resize itself. However, the window manager may choose to disallow the change. Note that the Sun console escape sequences are recognized by XFree86 xterm and by dtterm. The resize program may be installed as sunsize, which causes makes it assume the -s option. The rows and columns arguments must appear last; though they are normally associated with the -s option, they are parsed sepa- rately. FILES
/etc/termcap for the base termcap entry to modify. ~/.cshrc user's alias for the command. SEE ALSO
csh(1), tset(1), xterm(1) AUTHORS
Mark Vandevoorde (MIT-Athena), Edward Moy (Berkeley) Copyright (c) 1984, 1985 by X Consortium See X() for a complete copyright notice. X Window System RESIZE(1)
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