how to get second shell script flag value from the first shell script

amit_pansuria · 08-08-2008, 07:33 AM

helo I have two shell script.I m calling second script from first script in which in second script i will set one flag and exit script 2. now I want to get value of the flag in my first script how do i get that?

script 1:

#!/bin/bash

echo " calling script 2"
. ./script2
if [ $flag=0 ]
then
echo "flag = $flag"
echo " exiting script 1"
exit 0;
else
echo "do some thing"

exit 0;

script 2:

#!/bin/bash
flag=1
if [ -s /tmp/time.cfg ]
then
echo " file found"
else
export flag=0;
exit 0; { here I must have to exit script2 if file is not found }
fi

echo " do some process"

exit 0;

I dont get value of flag in script1

Regards,
Amit

matthewg42 · 08-08-2008, 08:17 AM

Please post code in [code] tags to aid readability.

These can't be the actual scripts you're using. Script 1 has several errors in the code - the comparison in the if statement should have spaces between the = and the operands of the comparison, and you have no closing "fi".

You also do not need ; after a command unless you want to follow it with another command on the same line.

I did a test, but with scripts which do not contain errors - works OK for me:

Code:

$ cat script1.sh
#!/bin/bash

var2="apples"
echo "this is script1.sh, about to source script2.sh var1=\"$var1\", var2=\"$var2\""
. ./script2.sh
echo "this is script1.sh, after sourcing script2.sh var1=\"$var1\", var2=\"$var2\""

$ cat script2.sh
#!/bin/bash

var1="oranges"
var2="bananas"
echo "this is script 2, var1=\"$var1\" var2=\"$var2\""

$ ./script1.sh
this is script1.sh, about to source script2.sh var1="", var2="apples"
this is script 2, var1="oranges" var2="bananas"
this is script1.sh, after sourcing script2.sh var1="oranges", var2="bananas"

MensaWater · 08-08-2008, 08:19 AM

edit script 2 so that you are doing:
"export flag=1" instead of just "flag=1"
You then don't need to export in the else you can just do "flag=0".

The first set is initializing the variable but isn't exporting so if you don't get to the else conditional it is never getting back to the first script.