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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?

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