getuid(2) — Справочная страница Linux

getuid(2)                  System Calls Manual                 getuid(2)

ИМЯ

       getuid, geteuid - get user identity

БИБЛИОТЕКА

       Standard C library (libc, -lc)

СИНТАКСИС

       #include <unistd.h>

       uid_t getuid(void);
       uid_t geteuid(void);

ОПИСАНИЕ

       getuid() returns the real user ID of the calling process.

       geteuid() returns the effective user ID of the calling process.

ОШИБКИ

       These functions are always successful and never modify errno.

СТАНДАРТЫ

       POSIX.1-2008.

ИСТОРИЯ

       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.

       On Alpha, instead of a pair of getuid() and geteuid() system
       calls, a single getxuid() system call is provided, which returns
       a pair of real and effective UIDs.  The glibc getuid() and
       geteuid() wrapper functions transparently deal with this.  See
       syscall(2) for details regarding register mapping.

СМОТРИТЕ ТАКЖЕ

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

КОЛОФОН

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.9.1.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2024-06-26.  If you discover any rendering problems in this HTML
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       to-date source for the page, or you have corrections or
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       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02                      getuid(2)

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