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CentOS 7.0 - man page for geteuid32 (centos section 2)

GETUID(2)			    Linux Programmer's Manual				GETUID(2)

NAME
       getuid, geteuid - get user identity

SYNOPSIS
       #include <unistd.h>
       #include <sys/types.h>

       uid_t getuid(void);
       uid_t geteuid(void);

DESCRIPTION
       getuid() returns the real user ID of the calling process.

       geteuid() returns the effective user ID of the calling process.

ERRORS
       These functions are always successful.

CONFORMING TO
       POSIX.1-2001, 4.3BSD.

NOTES
   History
       In  UNIX  V6  the  getuid()  call returned (euid << 8) + uid.  UNIX V7 introduced separate
       calls getuid() and geteuid().

       The original Linux getuid() and geteuid() system calls supported  only  16-bit  user  IDs.
       Subsequently,  Linux  2.4  added  getuid32()  and geteuid32(), supporting 32-bit IDs.  The
       glibc getuid() and geteuid() wrapper functions  transparently  deal  with  the  variations
       across kernel versions.

SEE ALSO
       getresuid(2), setreuid(2), setuid(2), credentials(7)

COLOPHON
       This  page  is  part of release 3.53 of the Linux man-pages project.  A description of the
       project,    and	  information	 about	  reporting    bugs,	can    be    found     at
       http://www.kernel.org/doc/man-pages/.

Linux					    2010-11-22					GETUID(2)


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