shell_script showing errors in the below mentioned script while executing in linux

Shell Programming and Scripting
1

code:

IMAGE=$imgvalue;
 if [ $imgvalue :=1 ] 
then 
echo DO=ABC; 
elif [ $imgvalue :=2 ] 
then echo DO=ETC; 
elif [ $imgvalue :=3 ] 
then echo DO=XYZ; 
else 
echo "$imgvalue is unsupported"; 
exit 1; 
fi

in above script IMAGE=1 , IMAGE=2, IMAGE=3 whatever may be the value i have assigned it's showing only DO=ABC other conditions not working . any one pls check.

2

try this.

 
 
IMAGE=$imgvalue;
if [ "$imgvalue" -eq "1" ] 
then 
 echo DO=ABC; 
elif [ "$imgvalue" -eq "2" ] 
then 
 echo DO=ETC; 
elif [ "$imgvalue" -eq "3" ] 
then 
 echo DO=XYZ; 
else 
 echo "$imgvalue is unsupported"; 
 exit 1; 
fi

use [code] tag

3

Try:

case $imgvalue in
  1) echo DO=ABC;;
  2) echo DO=ETC;; 
  3) echo DO=XYZ;;
  *) echo "$imgvalue is unsupported" 
     exit 1
esac
4

i have tried all possibilities and solutions mentioned above . it's not working .

can any one help the make script coding with the above requirement.only in below senario it's working and displaying DO=ABC for all inputs like IMAGE=1 or IMAGE=2 or IMAGE=3

IMAGE=$imgvalue;
if  [ $imgvalue =:1 ]
then
echo DO=ABC;
elif [ $imgvalue =:2 ]
then
echo DO=ETC;
elif [ $imgvalue =:3 ]
then
echo DO=XYZ;
else
    echo "$imgvalue is unsupported";
    exit 1; 
fi
5

Hi,

I have tried the *two* solutions posted above and they both work. So can you be more specific about how it is not working.

If you are getting errors then post them.

6

what is the problem?

imgvalue=$1
 if [ $imgvalue = 1 ]
then
echo DO=ABC
elif [ $imgvalue = 2 ]
then echo DO=ETC
elif [ $imgvalue = 3 ]
then echo DO=XYZ
else
echo "$imgvalue is unsupported"
exit 1
fi

# ./script 1
DO=ABC
# ./script 2
DO=ETC
# ./script 3
DO=XYZ
# ./script 4
4 is unsupported
7

Hi,

cmd i am executing in linux:
and make is the file which having these changes.

$./make rel sapqe1 IMAGE=2
DO=ABC
$./make rel sapqe1 IMAGE=1
DO=ABC
$./make rel sapqe1 IMAGE=3
DO=ABC
$./make rel sapqe1 IMAGE=5
is unsupported

the problem is for every input of image only output i am getting DO=ABC

IMAGE=$imgvalue;
if  [ $imgvalue =:1 ]
then
echo DO=ABC;
elif [ $imgvalue =:2 ]
then
echo DO=ETC;
elif [ $imgvalue =:3 ]
then
echo DO=XYZ;
else
    echo "$imgvalue is unsupported";
    exit 1; 
fi

i am getting below error if i use if [ "$imgvalue" -eq "1" ] or if [ "$imgvalue" -eq "1" ]

error :
[: =: unary operator expected

8

firstly we must get the IMAGE value and its represented to $3
so $3="IMAGE=2"
and we must cut the value from IMAGE express with `imgvalue=${3/*=/}`
then imgvalue equals to 2..then go to if-elif..
try this...

imgvalue=${3/*=/}
if  [ $imgvalue = 1 ]
then
echo DO=ABC;
elif [ $imgvalue = 2 ]
then
echo DO=ETC;
elif [ $imgvalue = 3 ]
then
echo DO=XYZ;
else
    echo "$imgvalue is unsupported";
    exit 1;
fi