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 Technology
-- 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 .