получить реальные, эффективные и сохраненные идентификаторы пользователей / групп (get real, effective, and saved user/group IDs)
Имя (Name)
getresuid, getresgid - get real, effective, and saved user/group
IDs
Синопсис (Synopsis)
#define _GNU_SOURCE /* See feature_test_macros(7) */
#include <unistd.h>
int getresuid(uid_t *ruid, uid_t *euid, uid_t *suid);
int getresgid(gid_t *rgid, gid_t *egid, gid_t *sgid);
Описание (Description)
getresuid() returns the real UID, the effective UID, and the
saved set-user-ID of the calling process, in the arguments ruid,
euid, and suid, respectively. getresgid() performs the analogous
task for the process's group IDs.
Возвращаемое значение (Return value)
On success, zero is returned. On error, -1 is returned, and
errno is set to indicate the error.
Ошибки (Error)
EFAULT One of the arguments specified an address outside the
calling program's address space.
Версии (Versions)
These system calls appeared on Linux starting with kernel 2.1.44.
The prototypes are given by glibc since version 2.3.2, provided
_GNU_SOURCE is defined.
Стандарты (Conforming to)
These calls are nonstandard; they also appear on HP-UX and some
of the BSDs.
Примечание (Note)
The original Linux getresuid() and getresgid() system calls
supported only 16-bit user and group IDs. Subsequently, Linux
2.4 added getresuid32() and getresgid32(), supporting 32-bit IDs.
The glibc getresuid() and getresgid() wrapper functions
transparently deal with the variations across kernel versions.
Смотри также (See also)
getuid(2), setresuid(2), setreuid(2), setuid(2), credentials(7)
