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Full Discussion: Ignore error and get ls file count
Top Forums Shell Programming and Scripting Ignore error and get ls file count Post 302311776 by gbowdridge on Wednesday 29th of April 2009 01:34:43 PM
Old 04-29-2009
in my test, simply redirecting stderr of the ls command to /dev/null achived this:

num=`ls /appsrv/tmp/PrjRefData_20090428-*_in.xml 2>/dev/null | wc -l`

you could also add some code after the ls to see the return code is non-zero ($?), but it seems from testing the above that this is not nessesary as the above line set num to 0 for that example.

This is what you could add, as the very next line of execution, for reduntant error checkig, or an alternate solution:

if [ $? ne 0 ]
then
num=0
fi
 

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LEARN ABOUT DEBIAN

kissnetd

KISSNETD(8)						   Linux System Managers Manual 					       KISSNETD(8)

NAME

       kissnetd - Create a virtual network.

SYNOPSIS

       kissnetd [-f size] [-v] [-p <num> | tty... ]

DESCRIPTION

       Kissnetd allows the creation of a virtual network of AX.25 systems that use the KISS protocol. Each tty named on the command line is opened
       and any KISS frames received on tty is copied to the other ttys. This allows a number of AX.25 systems to share the same packets.

OPTIONS

       -p num	 Automaticaly allocate num Unix98 slave pty's via /dev/ptmx.  These are written to stdout and could  be  parsed  by  your  startup
		 scripts.  "kissnetd -p 3" is an comfortable alternative to "kissnetd /dev/ptmx /dev/ptmx /dev/ptmx".

       -f size	 This  sets  the  maximum KISS frame size that the program will handle. The default is 512 bytes which will be adequate under most
		 circumstances.

       -v	 Enables verbose mode, tracing of data passed is sent to standard output.

SEE ALSO

       kissattach(8), kissparms(8), mkiss(8).

AUTHOR

       Frederic Rible F1OAT <frible@teaser.fr>

Linux								  13 October 1996						       KISSNETD(8)
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