getenv(3c) [hpux man page]

getenv(3C)																getenv(3C)

NAME

       getenv() - return value for environment name

SYNOPSIS

DESCRIPTION

       searches  the  environment  list (see environ(5)) for a string of the form and returns a pointer to the value in the current environment if
       such a string is present or a NULL pointer if it is not.  name can be either the desired name, null-terminated, or of  the  form  in  which
       case uses the portion to the left of the as the search key.

       If the optional HP Getenv-Perf-Enh product is installed on the system, the performance of in threaded applications may increase.

WARNINGS

       returns a pointer to static data which can be overwritten by subsequent calls.

EXTERNAL INFLUENCES

   Locale
       The category determines the interpretation of characters in name as single and/or multibyte characters.

   International Code Set Support
       Single and multibyte character code sets are supported.

SEE ALSO

       exec(2), putenv(3C), environ(5), thread_safety(5).

STANDARDS CONFORMANCE

																	getenv(3C)

getenv(3C)						   Standard C Library Functions 						getenv(3C)

NAME

       getenv - return value for environment name

SYNOPSIS

       #include <stdlib.h>

       char *getenv(const char *name);

DESCRIPTION

       The  getenv()  function	searches  the environment list (see environ(5)) for a string of the form name=value and, if the string is present,
       returns a pointer to the value in the current environment.

RETURN VALUES

       If successful, getenv() returns a pointer to the value in the current environment; otherwise, it returns a null pointer.

USAGE

       The getenv() function can be safely called from a multithreaded	application.   Care  must  be  exercised  when	using  both  getenv()  and
       putenv(3C)  in  a multithreaded application.  These functions examine and modify the environment list, which is shared by all threads in an
       application.  The system prevents the list from being accessed simultaneously by two different threads.	It does not, however, prevent  two
       threads from successively accessing the environment list using  getenv() or putenv(3C).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       exec(2), putenv(3C), attributes(5), environ(5), standards(5)

SunOS 5.10							    24 Jul 2002 							getenv(3C)