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RE: Advanced Korn Question

From: hp <hp_at_lechateau.ca>
Date: Tue, 13 Mar 2001 14:39:25 -0800
Message-ID: <F001.002CB7A6.20010313134628@fatcity.com>

can you tell mne what the difference is between:  > $log 2>&1 &
and
2>&1 > $log &

if tried both ways and the std err and std out go to the log both ways.

-----Original Message-----
Sent: Tuesday, March 13, 2001 3:09 PM
To: Multiple recipients of list ORACLE-L

Your syntax is incorrect, try this:

su - updater -c "/prod/exe/pos2100" > $log 2>&1 &

>>> RROGERS_at_galottery.org 03/13 1:47 PM >>>
David,
 I think it is because of the ksh b.ksh you execute. The ksh is looking for some place to direct the output to and you supply that with the 2>&1 command.
I am only quessing that is the answer because it has been awhile since I used Unix.
ROR mm
>>> david.hill_at_lechateau.ca 03/13/01 11:21AM >>>
I was hoping someone in the list might be able to help me understand why this happens.

i have a script a.ksh that looks like this a.ksh



ksh b.ksh

b.ksh


su - updater -c "/prod/exe/pos2100" 2>&1 $log1 &
su - updater -c "/prod/exe/pos2100" 2>&1 $log2 &
su - updater -c "/prod/exe/pos2100" 2>&1 $log3 &
su - updater -c "/prod/exe/pos2100" 2>&1 $log4 &
wait

when i run this only 1 of the background runs and the other 3 hang

but if i change a.ksh to this



ksh b.ksh 2>&1 /dev/null

everything works ok and all 4 jobs go into background and run fine

coudl someone tell me why this happens

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Author: david hill
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Author: hp
  INET: hp_at_lechateau.ca

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Received on Tue Mar 13 2001 - 16:39:25 CST

Original text of this message

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