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Non-integer argument in expr

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Top Forums Shell Programming and Scripting Non-integer argument in expr
# 8  
Old 05-08-2011
Quote:
Originally Posted by ahamed101
can you tell me how you are executing this? where have you included the arguments? try echo-ing N1 and N2 and see they have the desired values.

regards,
Ahamed
i try this as you said
Code:
#!/bin/bash
read  N1; read  N2
typeset -i N1
typeset -i N2
echo $N1
echo $N2
((sum=N1+N2)) 
echo $sum

and i got this

Code:
ehsan@debian:~$ telnet 192.168.1.4 1234
Trying 192.168.1.4...
Connected to 192.168.1.4.
Escape character is '^]'.
12
23
12
23
")syntax error: invalid arithmetic operator (error token is "

Connection closed by foreign host.

i put this script under xinetd as a service and i execute it whit telnet
# 9  
Old 05-08-2011
the machine where you are trying to telnet, does this script run on that machine?

Code:
#!/bin/bash
set -x
#and the rest of the code

# 10  
Old 05-08-2011
i try telnet on the same machine with script and another machine but there is same results

Code:
ehsan@debian:~$ telnet 192.168.1.4 1234
Trying 192.168.1.4...
Connected to 192.168.1.4.
Escape character is '^]'.
+ read N1
1
+ read N2
12
+ typeset -i N1
+ typeset -i N2
+ echo $'1\r'
1
+ echo $'12\r'
12
+ (( sum=N1+N2 ))
")syntax error: invalid arithmetic operator (error token is "
+ echo

Connection closed by foreign host.

---------- Post updated at 03:44 AM ---------- Previous update was at 03:44 AM ----------

i try telnet on the same machine with script and another machine but there is same results

Code:
ehsan@debian:~$ telnet 192.168.1.4 1234
Trying 192.168.1.4...
Connected to 192.168.1.4.
Escape character is '^]'.
+ read N1
1
+ read N2
12
+ typeset -i N1
+ typeset -i N2
+ echo $'1\r'
1
+ echo $'12\r'
12
+ (( sum=N1+N2 ))
")syntax error: invalid arithmetic operator (error token is "
+ echo

Connection closed by foreign host.

---------- Post updated at 03:48 AM ---------- Previous update was at 03:44 AM ----------

Quote:
Originally Posted by niasha
i try telnet on the same machine with script and another machine but there is same results

Code:
ehsan@debian:~$ telnet 192.168.1.4 1234
Trying 192.168.1.4...
Connected to 192.168.1.4.
Escape character is '^]'.
+ read N1
1
+ read N2
12
+ typeset -i N1
+ typeset -i N2
+ echo $'1\r'
1
+ echo $'12\r'
12
+ (( sum=N1+N2 ))
")syntax error: invalid arithmetic operator (error token is "
+ echo

Connection closed by foreign host.

---------- Post updated at 03:44 AM ---------- Previous update was at 03:44 AM ----------

i try telnet on the same machine with script and another machine but there is same results

Code:
ehsan@debian:~$ telnet 192.168.1.4 1234
Trying 192.168.1.4...
Connected to 192.168.1.4.
Escape character is '^]'.
+ read N1
1
+ read N2
12
+ typeset -i N1
+ typeset -i N2
+ echo $'1\r'
1
+ echo $'12\r'
12
+ (( sum=N1+N2 ))
")syntax error: invalid arithmetic operator (error token is "
+ echo

Connection closed by foreign host.

is ( \r ) make thing wrong ?
# 11  
Old 05-08-2011
There is a \r and that's the issue I guess
Try this now, should work

Code:
#!/bin/bash
set -x
read  N1; read  N2
typeset -i N1
typeset -i N2
n1=$( echo $N1 | tr -s "\r" )
n2=$( echo $N2 | tr -s "\r" )
echo $n1" "$n2
((sum=n1+n2)) 
echo $sum

# 12  
Old 05-08-2011
Quote:
Originally Posted by ahamed101
There is a \r and that's the issue I guess
Try this now, should work

Code:
#!/bin/bash
set -x
read  N1; read  N2
typeset -i N1
typeset -i N2
n1=$( echo $N1 | tr -s "\r" )
n2=$( echo $N2 | tr -s "\r" )
echo $n1" "$n2
((sum=n1+n2)) 
echo $sum


same error
Code:
ehsan@debian:~$ telnet 192.168.1.4 1234
Trying 192.168.1.4...
Connected to 192.168.1.4.
Escape character is '^]'.
+ read N1
12
+ read N2
13
+ typeset -i N1
+ typeset -i N2
++ echo $'12\r'
++ tr -s '\r'
+ n1=$'12\r'
++ echo $'13\r'
++ tr -s '\r'
+ n2=$'13\r'
'13cho '12
 13
+ (( sum=n1+n2 ))
")syntax error: invalid arithmetic operator (error token is "
+ echo

Connection closed by foreign host.

# 13  
Old 05-08-2011
try different combinations

Code:
n1=$( echo $N1 | tr -d '\r' )
n2=$( echo $N2 | tr -d '\r' )
#or
n1=$( echo $N1 | sed 's/\r//g' )
n2=$( echo $N2 | sed 's/\r//g' )

# 14  
Old 05-08-2011
Quote:
Originally Posted by ahamed101
try different combinations

Code:
n1=$( echo $N1 | tr -d '\r' )
n2=$( echo $N2 | tr -d '\r' )
#or
n1=$( echo $N1 | sed 's/\r//g' )
n2=$( echo $N2 | sed 's/\r//g' )

Code:
n1=$( echo $N1 | tr -d '\r' )
n2=$( echo $N2 | tr -d '\r' )

worked , thanks a lot , and one more things , what is this error ?
Code:
Escape character is '^]'.


Code:
ehsan@debian:~$ telnet 192.168.1.4 1234
Trying 192.168.1.4...
Connected to 192.168.1.4.
Escape character is '^]'.
+ read N1
12
+ read N2
45
+ typeset -i N1
+ typeset -i N2
++ echo $'12\r'
++ tr -d '\r'
+ n1=12
++ echo $'45\r'
++ tr -d '\r'
+ n2=45
+ echo '12 45'
12 45
+ (( sum=n1+n2 ))
+ echo 57
57
Connection closed by foreign host.
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