clearenv(3)clearenv(3)NAMEclearenv - Clears the process environment
SYNOPSIS
#include <stdlib.h>
int clearenv(
void );
LIBRARY
Standard C Library (libc)
DESCRIPTION
The clearenv() function clears the process environment. No environment
variables are defined immediately after a call to clearenv(). The
clearenv() function sets the value of the external variable environ to
NULL.
NOTES
Trial use
RETURN VALUES
Upon successful completion, the clearenv() function returns 0 (zero).
Otherwise, it returns -1.
If environ has been modified by anything other than the putenv(),
getenv(), or clearenv() functions, then clearenv() will return an error
and the process environment will remain unchanged.
SEE ALSO
Functions: exec(2), getenv(3), putenv(3)clearenv(3)