Pointer to the process's environment variables
#include <unistd.h> extern char ** environ;
Use the -l c option to qcc to link against this library. This library is usually included automatically.
When a process begins, an array of strings called the environment is made available. This array is pointed to by the external variable environ. The strings in the array have the form:
and are terminated by a NULL pointer.
Changes to the environment affect all threads in a multithreaded process.