1GETUID(2)                  Linux Programmer's Manual                 GETUID(2)
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NAME

6       getuid, geteuid - get user identity
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SYNOPSIS

9       #include <unistd.h>
10       #include <sys/types.h>
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12       uid_t getuid(void);
13       uid_t geteuid(void);
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DESCRIPTION

16       getuid() returns the real user ID of the calling process.
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18       geteuid() returns the effective user ID of the calling process.
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ERRORS

21       These functions are always successful.
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CONFORMING TO

24       POSIX.1-2001, 4.3BSD.
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NOTES

27   History
28       In  UNIX  V6  the  getuid()  call  returned (euid << 8) + uid.  UNIX V7
29       introduced separate calls getuid() and geteuid().
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31       The original Linux getuid() and geteuid() system calls  supported  only
32       16-bit   user  IDs.   Subsequently,  Linux  2.4  added  getuid32()  and
33       geteuid32(), supporting 32-bit IDs.  The glibc getuid()  and  geteuid()
34       wrapper  functions transparently deal with the variations across kernel
35       versions.
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SEE ALSO

38       getresuid(2), setreuid(2), setuid(2), credentials(7)
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COLOPHON

41       This page is part of release 3.53 of the Linux  man-pages  project.   A
42       description  of  the project, and information about reporting bugs, can
43       be found at http://www.kernel.org/doc/man-pages/.
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47Linux                             2010-11-22                         GETUID(2)
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