GETUID
Section: Linux Programmer's Manual (2)
Updated: 1993-07-23
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.
When a normal program is executed, the effective and real user ID of
the process are set to the ID of the user executing the file.
When a set ID program is executed the real user ID is set to the
calling user and the effective user ID corresponds to the set ID bit
on the file being executed.
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().
SEE ALSO
getresuid(2),
setreuid(2),
setuid(2),
credentials(7)
COLOPHON
This page is part of release 3.27 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/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- ERRORS
-
- CONFORMING TO
-
- NOTES
-
- History
-
- SEE ALSO
-
- COLOPHON
-
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Time: 07:34:57 GMT, March 26, 2013