unsetenv - phpMan

SETENV(3)                  Linux Programmer’s Manual                 SETENV(3)



NAME
       setenv - change or add an environment variable

SYNOPSIS
       #include <stdlib.h>

       int setenv(const char *name, const char *value, int overwrite);

       void unsetenv(const char *name);

DESCRIPTION
       The  setenv()  function  adds  the  variable name to the environment with the value
       value, if name does not already exist.  If name does exist in the environment, then
       its  value is changed to value if overwrite is non-zero; if overwrite is zero, then
       the value of name is not changed.

       The unsetenv() function deletes the variable name from the environment.

RETURN VALUE
       The setenv() function returns zero on success, or  -1  if  there  was  insufficient
       space in the environment.

CONFORMING TO
       BSD 4.3

SEE ALSO
       clearenv(3), getenv(3), putenv(3), environ(5)




BSD                               1993-04-04                         SETENV(3)

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