How to Compare string with integer in bash shell

Question

In my program I have to compare a string to the integer like

            temp=$(taskset -p $pid)
            if[ ${temp:35:1} -eq $cpu || ${temp:35:2} -eq $cpu ] ; then

Here I am comparing a substring from temp with integer cpu. But when I run this script I get following error

line 16: syntax error near unexpected token then' line 16: if[ ${temp:35:1} -eq $cpu || ${temp:35:2} -eq $cpu ] ; then'

How can I compare this string with integer?

jlliagre · Accepted Answer · 2013-11-26 23:39:25Z

2

|| is for the shell, use -o for the test command:

if [ ${temp:35:1} -eq $cpu -o ${temp:35:2} -eq $cpu ]

You might replace the whole thing by

if [ $(taskset -p $pid|awk '{print $NF}') = $cpu ]

answered Nov 26, 2013 at 8:40

jlliagre

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2 Comments

It's hard to tell without knowing what taskset returns and what the cpu variable contains. Answer updated anyway.

NF = number of fields, $NF = the value of the last field

DusteD · Accepted Answer · 2013-11-26 08:38:04Z

0

Syntax error.

if [ condition1 ] || [ condition2 ] && [ condition3 ] ; then

answered Nov 26, 2013 at 8:38

DusteD

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R.Sicart · Accepted Answer · 2013-11-26 08:50:44Z

0

to compare the value between an integer and a string you should compare the 2 vars inside double quotes: "$a" == "$b"

answered Nov 26, 2013 at 8:50

R.Sicart

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