HP-UX Reference (11i v2 07/12) - 3 Library Functions N-Z (vol 7)

setenv(3C) setenv(3C)

setenv("NEWHOME","/tmp/HOME",1);

The following code updates the variable HOME.

const char *envname="HOME";

const char *envval="/tmp/home";

setenv(envname,envval,1);

The following code removes the variable NEWHOME

from the current environment.

unsetenv("NEWHOME");

WARNINGS

The setenv() and unsetenv() functions manipulate the environment pointed to by environ, and can

be used in conjunction with

getenv(). However, envp (the third argument to main) is not changed.

The

setenv() uses malloc() to enlarge the environment (see malloc(3C)).

After the

setenv() or unsetenv() function is called, environment variables may not be in alphabeti-

cal order.

Users of setenv() and unsetenv() should note that the libcext library will not be available in

future releases of HP-UX. However these functions will be available as part of the C library libc

AUTHOR

setenv() and unsetenv() were developed by HP.