getenv man page on SmartOS

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GETENV(3C)							    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	appli‐
       cation.	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 suc‐
       cessively 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)

				 Jul 24, 2002			    GETENV(3C)
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