manipulate its environment using the functions getenv (3), putenv (3), setenv (3), and unsetenv ... execve (2), clearenv (3), exec (3), getenv (3), putenv (3), setenv (3), unsetenv…POSIX.1-2008)] getc_unlocked() getchar_unlocked() getdate() getenv() getgrent() getgrgid() getgrnam() gethostbyaddr() [POSIX.1-2001 only (function removedSafety issue access the environment with getenv (3) or similar, without any guards to ensure