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Environmental Variable

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# 1  
Old 05-14-2007
Question Environmental Variable
Hi,

I'm exporting an environmental variable from a C program using putenv function. I'm calling the exe of the C program from shell script. But when I display the environmental variables from the Shell script, My varaible is not getting displayed.
Can anyone please tell me how to get it in shell script ?

Thanks,
Jane A
Last edited by janemary.a; 05-14-2007 at 10:36 AM..
# 2  
Old 05-14-2007
The C code runs in a child process. Any variable created there is not seen by the parent. If C the code wants to have the variable set in the parent it will have to print it, then the parent will have to read what the child process wrote.
Code:
in my_c_program somewhere:
printf("MYENV=%s\n", new_value_for_variable)

shell:
Code:
#!/bin/ksh
new_env_var=$(my_c_program| awk -F= '{ if($1=="MYENV") {print $2} }' )
export new_env_var

# 3  
Old 05-15-2007
Quote:
Originally Posted by jim mcnamara
The C code runs in a child process. Any variable created there is not seen by the parent. If C the code wants to have the variable set in the parent it will have to print it, then the parent will have to read what the child process wrote.
Code:
in my_c_program somewhere:
printf("MYENV=%s\n", new_value_for_variable)

shell:
Code:
#!/bin/ksh
new_env_var=$(my_c_program| awk -F= '{ if($1=="MYENV") {print $2} }' )
export new_env_var

Hi Jim !

Thank you so much. It worked.

Jane A
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