128  * Create a copy of environ and return the new argv[0] size
139  * | environ[0] (pointer)
140  * | environ[1] (pointer)
149  * | *environ[0] (string)
150  * | *environ[1] (string)
153  * After this function is call, all the *environ[*] strings will be moved in
154  * dynamic memory, and the old environ strings space in the stack can be used
158   // Count the number of items in environ  in move_environ()
160   if (environ) {  in move_environ()
161     while (environ[++env_last_id])  in move_environ()
167     // If there is something in environ (it exists and there is something more  in move_environ()
169     // for argv after environ is moved.  In fact, this would be the size of all  in move_environ()
170     // the argv strings, plus the size of all the current environ strings.  in move_environ()
172     // - the address of the last element of environ,  in move_environ()
173     // - plus its content size, so now we have the very last byte of environ,  in move_environ()
175     argv_strings_size = environ[env_last_id - 1] + strlen(environ[env_last_id - 1]) - argv[0];  in move_environ()
181   if (environ) {  in move_environ()
182     // Create a copy of environ in dynamic memory  in move_environ()
185     // Create a copy in dynamic memory for all the environ strings  in move_environ()
187     while (environ[++i]) {  in move_environ()
188       new_environ[i] = strdup(environ[i]);  in move_environ()
191     // Also, update the environ pointer  in move_environ()
192     environ = new_environ;  in move_environ()
206  * function will move environ and use its reclaimed space.