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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

tctmttest

TCTMTTEST(1)							   Tokyo Cabinet						      TCTMTTEST(1)

NAME

       tctmttest - test cases of the table database API

DESCRIPTION

       The command `tctmttest' is a utility for facility test under multi-thread situation.  This command is used in the following format.  `path'
       specifies the path of a database file.  `tnum' specifies the number of running threads.	`rnum' specifies the number of iterations.  `bnum'
       specifies the number of buckets.  `apow' specifies the power of the alignment.  `fpow' specifies the power of the free block pool.

	      tctmttest  write	[-tl]  [-td|-tb|-tt|-tx]  [-rc	num]  [-lc  num] [-nc num] [-xm num] [-df num] [-ip] [-is] [-in] [-it] [-if] [-ix]
	      [-nl|-nb] [-rnd] path tnum rnum [bnum [apow [fpow]]]
		     Store records with columns "str", "num", "type", and "flag".
	      tctmttest read [-rc num] [-lc num] [-nc num] [-xm num] [-df num] [-nl|-nb] [-rnd] path tnum
		     Retrieve all records of the database above.
	      tctmttest remove [-rc num] [-lc num] [-nc num] [-xm num] [-df num] [-nl|-nb] [-rnd] path tnum
		     Remove all records of the database above.
	      tctmttest wicked [-tl] [-td|-tb|-tt|-tx] [-nl|-nb] path tnum rnum
		     Perform updating operations selected at random.
	      tctmttest typical [-tl] [-td|-tb|-tt|-tx] [-rc num] [-lc num] [-nc num] [-xm num] [-df num] [-nl|-nb] [-rr num] path tnum rnum [bnum
	      [apow [fpow]]
		     Perform typical operations selected at random.

       Options feature the following.

	      -tl : enable the option `TDBTLARGE'.
	      -td : enable the option `TDBTDEFLATE'.
	      -tb : enable the option `TDBTBZIP'.
	      -tt : enable the option `TDBTTCBS'.
	      -tx : enable the option `TDBTEXCODEC'.
	      -rc num : specify the number of cached records.
	      -lc num : specify the number of cached leaf pages.
	      -nc num : specify the number of cached non-leaf pages.
	      -xm num : specify the size of the extra mapped memory.
	      -df num : specify the unit step number of auto defragmentation.
	      -ip : create the number index for the primary key.
	      -is : create the string index for the column "str".
	      -in : create the number index for the column "num".
	      -it : create the string index for the column "type".
	      -if : create the token inverted index for the column "flag".
	      -ix : create the q-gram inverted index for the column "text".
	      -nl : enable the option `TDBNOLCK'.
	      -nb : enable the option `TDBLCKNB'.
	      -rnd : select keys at random.
	      -nc : omit the comparison test.
	      -rr num : specify the ratio of reading operation by percentage.

       This command returns 0 on success, another on failure.

SEE ALSO

       tcttest(1), tctmgr(1), tctdb(3), tokyocabinet(3)

Man Page							    2011-02-12							      TCTMTTEST(1)
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