posix_setgid Set the GID of the current process &reftitle.description; boolposix_setgid intgid Set the real group ID of the current process. This is a privileged function and needs appropriate privileges (usually root) on the system to be able to perform this function. The appropriate order of function calls is posix_setgid first, posix_setuid last. If the caller is a super user, this will also set the effective group id. &reftitle.parameters; gid The group id. &reftitle.returnvalues; &return.success; &reftitle.examples; This example will print out the effective group id, once it is changed. ]]> &reftitle.seealso; posix_getgrgid posix_getgid