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   geteuid    ( 2 )

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Имя (Name)

getuid, geteuid - get user identity

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Синопсис (Synopsis)

#include <unistd.h>

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

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Описание (Description)

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

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

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Ошибки (Error)

These functions are always successful and never modify errno.

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Стандарты (Conforming to)

POSIX.1-2001, POSIX.1-2008, 4.3BSD.

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Примечание (Note)

History
       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.

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Смотри также (See also)

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

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