redhat man page for getenv

GETENV(3)						     Linux Programmer's Manual							 GETENV(3)

NAME
       getenv - get an environment variable

SYNOPSIS
       #include <stdlib.h>

       char *getenv(const char *name);

DESCRIPTION
       The  getenv()  function searches the environment list for a string that matches the string pointed to by name.  The strings are of the form
       name = value.

RETURN VALUE
       The getenv() function returns a pointer to the value in the environment, or NULL if there is no match.

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899

SEE ALSO
       putenv(3), setenv(3), clearenv(3), unsetenv(3), environ(5)

GNU
								    1993-04-03								 GETENV(3)