cuserid(3) [netbsd man page]

CUSERID(3)						   BSD Library Functions Manual 						CUSERID(3)

NAME

     cuserid -- get user name

LIBRARY

     Compatibility Library (libcompat, -lcompat)

SYNOPSIS

     #include <stdio.h>

     char *
     cuserid(char *buf);

DESCRIPTION

     This interface is available from the compatibility library, libcompat and has been obsoleted by getlogin(2).

     The cuserid() function returns a character string representation of the user name associated with the effective user ID of the calling
     process.

     If buf is not the NULL pointer, the user name is copied into the memory referenced by buf.  The argument buf is assumed to point to an array
     at least L_cuserid (as defined in the include file <stdio.h>) bytes long.	Otherwise, the user name is copied to a static buffer.

RETURN VALUES

     If buf is not the NULL pointer, buf is returned; otherwise the address of the static buffer is returned.

     If the user name could not be determined, if buf is not the NULL pointer, the null character '' will be stored at *buf; otherwise the NULL
     pointer is returned.

SEE ALSO

     getlogin(2), getpwent(3)

STANDARDS

     The cuserid() function conforms to IEEE Std 1003.1-1988 (``POSIX.1'').

BUGS

     Due to irreconcilable differences in historic implementations, cuserid() was removed from the ISO/IEC 9945-1:1990 (``POSIX.1'') standard.
     This implementation exists purely for compatibility with existing programs.  New programs should use one of the following three alternatives
     to obtain the user name:

	   1.	getlogin() to return the user's login name.
	   2.	getpwuid(geteuid()) to return the user name associated with the calling process' effective user ID.
	   3.	getpwuid(getuid()) to return the user name associated with the calling process' real user ID.

BSD
								 November 28, 1993							       BSD

Check Out this Related Man Page

cuserid(3S)															       cuserid(3S)

NAME

       cuserid() - get character login name of the user

SYNOPSIS

   Remarks:
       Because	this  function	behaved differently in previous releases of HP-UX, and behaves differently on other systems, its use is not recom-
       mended.	It is provided only for conformance to current industry standards, and is subject to withdrawal in future releases of HP-UX.

       For portability and security, application writers and maintainers should search their existing code and replace references to with  equiva-
       lent calls to or depending on which user name is desired.

DESCRIPTION

       generates  a  character-string  representation  of  the	user  name  corresponding to the effective user ID of the process.  If s is a NULL
       pointer, this representation is generated in an internal static area, the address of which is returned.	Otherwise, s is assumed  to  point
       to an array of at least characters; the representation is left in this array.  The constant is defined in the header file.

       For multi-thread applications, if s is a NULL pointer, the operation is not performed and a NULL pointer is returned.

DIAGNOSTICS

       If the login name cannot be found, returns a NULL pointer; if s is not a NULL pointer, a null character is placed at s[0].

WARNINGS

   Obsolescent Interfaces
       is to be obsoleted at a future date.

SEE ALSO

       geteuid(2), getuid(2), getlogin(3C), getpwent(3C), getpwuid(3C), thread_safety(5).

STANDARDS CONFORMANCE

								  TO BE OBSOLETED						       cuserid(3S)

Linux and UNIX Man Pages

cuserid(3) [netbsd man page]

Check Out this Related Man Page