This manual page is part of the POSIX Programmer's Manual. The Linux
implementation of this interface may differ (consult the corresponding Linux
manual page for details of Linux behavior), or the interface may not be
implemented on Linux.
getuid — get a real user ID
The getuid() function shall return the real user ID of the calling
The getuid() function shall always be successful and no return value is
reserved to indicate the error.
No errors are defined.
The following sections are informative.
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.
getegid(), geteuid(), getgid(),
setegid(), seteuid(), setgid(),
setregid(), setreuid(), setuid()
The Base Definitions volume of POSIX.1‐2008,
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2013 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
7, Copyright (C) 2013 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. (This is POSIX.1-2008 with the 2013
Technical Corrigendum 1 applied.) 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.unix.org/online.html .
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