xfree86 man page for getuid

GETUID(3P)						     POSIX Programmer's Manual							GETUID(3P)

PROLOG
       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME
       getuid - get a real user ID

SYNOPSIS
       #include <unistd.h>

       uid_t getuid(void);

DESCRIPTION
       The getuid() function shall return the real user ID of the calling process.

RETURN VALUE
       The getuid() function shall always be successful and no return value is reserved to indicate the error.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
   Setting the Effective User ID to the Real User ID
       The following example sets the effective user ID and the real user ID of the current process to the real user ID of the caller.

	      #include <unistd.h>
	      #include <sys/types.h>
	      ...
	      setreuid(getuid(), getuid());
	      ...

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       getegid(), geteuid(), getgid(),	setegid(),  seteuid(),	setgid(),  setregid(),	setreuid(),  setuid(),	the  Base  Definitions	volume	of
       IEEE Std 1003.1-2001, <sys/types.h>, <unistd.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
       and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								GETUID(3P)