cuserid(3C)

NAME

     cuserid - get character login name of the user

SYNOPSIS

     #include <stdio.h>

     char *cuserid(char *s);

DESCRIPTION

     The  cuserid()   function   generates   a   character-string
     representation  of  the  login name under which the owner of
     the current process is logged in. If s is  a  null  pointer,
     this  representation is generated in an internal static area
     whose address is returned. Otherwise, s is assumed to  point
     to  an array of at least L_cuserid characters; the represen-
     tation is left in this  array.  The  constant  L_cuserid  is
     defined in the <stdio.h> header.

     In multithreaded applications, the caller must always supply
     an array s for the return value.

RETURN VALUES

     If the login name cannot be found, cuserid() returns a  null
     pointer.   If  s  is  not a null pointer, the null character
     `\0' will be placed at s[0].

ATTRIBUTES

     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|

SEE ALSO

     getlogin(3C), getpwnam(3C), attributes(5)