Here I wrote a C program which executes hi.sh file using system call.

Here I used . ./hi.sh so I want to execute this script in the same shell and then try to get environment variable using getenv function, but here I am getting different output from what I expected.

The hi.sh file contains

export TEST=10
return

Means when I run this hi.sh file using system call, its export TEST sets the value to 10 in same shell. After this, I am trying to get this variable value but its given NULL value.

And if I run this script manually from console like . ./hi.sh then it works fine and I get 10 value of TEST using getenv("TEST") function.

Code: 

#include <stdio.h>
int main()
{
    system(". ./hi.sh");
    char *errcode;
    char *env = "TEST";
    int errCode;    
    errcode = getenv(env);
    printf("Value is = %s\n",errcode);
    if (errcode != NULL) {
        errCode =atoi(errcode);
        printf("Value is = %d\n",errCode);
    }
}

output : 

Value is = (null)

How can I export TEST variable in program shell? If system() executes commands in different shell then how can I use C program code to get an environment variable which is exported by the shell invoked via a system() call?

c linux embedded
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