clearenv(3) Library Functions Manual clearenv(3)
NAME
clearenv - Clears the process environment
LIBRARY
Standard C Library (libc.a)
SYNOPSIS
#include <stdlib.h>
int clearenv ( void );
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.
RELATED INFORMATION
Functions: exec(2), getenv(3), putenv(3) delim off
clearenv(3)
