1GETUID(3P)                 POSIX Programmer's Manual                GETUID(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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11

NAME

13       getuid — get a real user ID
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SYNOPSIS

16       #include <unistd.h>
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18       uid_t getuid(void);
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DESCRIPTION

21       The getuid() function shall return the real  user  ID  of  the  calling
22       process.
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RETURN VALUE

25       The getuid() function shall always be successful and no return value is
26       reserved to indicate the error.
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ERRORS

29       No errors are defined.
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31       The following sections are informative.
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EXAMPLES

34   Setting the Effective User ID to the Real User ID
35       The following example sets the effective user ID and the real  user  ID
36       of the current process to the real user ID of the caller.
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38           #include <unistd.h>
39           #include <sys/types.h>
40           ...
41           setreuid(getuid(), getuid());
42           ...
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APPLICATION USAGE

45       None.
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RATIONALE

48       None.
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FUTURE DIRECTIONS

51       None.
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SEE ALSO

54       getegid(),   geteuid(),   getgid(),   setegid(),  seteuid(),  setgid(),
55       setregid(), setreuid(), setuid()
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57       The Base Definitions volume of POSIX.1‐2008, <sys_types.h>, <unistd.h>
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60       Portions of this text are reprinted and reproduced in  electronic  form
61       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
62       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
63       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
64       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
65       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
66       event of any discrepancy between this version and the original IEEE and
67       The  Open Group Standard, the original IEEE and The Open Group Standard
68       is the referee document. The original Standard can be  obtained  online
69       at http://www.unix.org/online.html .
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71       Any  typographical  or  formatting  errors that appear in this page are
72       most likely to have been introduced during the conversion of the source
73       files  to  man page format. To report such errors, see https://www.ker‐
74       nel.org/doc/man-pages/reporting_bugs.html .
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78IEEE/The Open Group                  2013                           GETUID(3P)
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