GETUID(2) manual page
Table of Contents
getuid, geteuid - get user identity
#include
<unistd.h>
#include <sys/types.h>
uid_t getuid(void);
uid_t geteuid(void);
getuid() returns the real user ID of the
calling process.
geteuid() returns the effective user ID of the calling
process.
These functions are always successful.
POSIX.1-2001,
4.3BSD.
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.
getresuid(2)
, setreuid(2)
, setuid(2)
, credentials(7)
This page is part of release 3.78 of the Linux man-pages project.
A description of the project, information about reporting bugs, and the
latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.
Table of Contents
![[Go to CFHT Home Page]](/images/cfht-icon.gif){kind=icon}
Man Pages 
Back to Software Index 
Manpage Top Level