v7 man page for getenv

GETENV(3)						     Library Functions Manual							 GETENV(3)

NAME
       getenv - value for environment name

SYNOPSIS
       char *getenv(name)
       char *name;

DESCRIPTION
       Getenv  searches  the  environment list (see environ(5)) for a string of the form name=value and returns value if such a string is present,
       otherwise 0 (NULL).

SEE ALSO
       environ(5), exec(2)

																	 GETENV(3)