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#1
August 7th, 2004, 11:54 PM
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why can't i run expr command. please
ps -e|grep vap
if [ $? = 0 ] then x = ` expr $x + 1 ` else echo N O T - R U N N I N G fi ps -e|grep amserv if [ $? = 0 ] then x = ` expr $x + 1 ` else echo N O T - R U N N I N G fi echo There are $x processes running this is part of my script where i need to do increments if the test is true, but it always return an error in expr.. please help me out.. 
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#2
August 8th, 2004, 07:32 AM
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x must have an illegal value at the time that expr runs. I don't see "x=0" anywhere, but I understand that you posted a fragment of a script. Put a "echo x = $x" statement in front of the expr to help debug this.
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#4
August 9th, 2004, 03:59 PM
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FWIW -
This expects the item to be tested to be a string Code:
if [ $? = 0 ] This expects a number Code:
if [ $? -eq 0 ] You can get funny results using numbers as strings when you really want a numeric comparison.
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