определите доступные рабочие места, сеансы, вошедших в систему пользователей и виртуальные машины / контейнеры (determine available seats, sessions, logged in users and virtual machines/containers)
Имя (Name)
sd_get_seats, sd_get_sessions, sd_get_uids, sd_get_machine_names
- Determine available seats, sessions, logged in users and
virtual machines/containers
Синопсис (Synopsis)
#include <systemd/sd-login.h>
int sd_get_seats(char ***seats);
int sd_get_sessions(char ***sessions);
int sd_get_uids(uid_t **users);
int sd_get_machine_names(char ***machines);
Описание (Description)
sd_get_seats() may be used to determine all currently available
local seats. Returns the number of seat identifiers and if the
input pointer is non-NULL, a NULL-terminated array of seat
identifiers is stored at the address. The returned array and all
strings it references need to be freed with the libc free(3) call
after use. Note that instead of an empty array NULL may be
returned and should be considered equivalent to an empty array.
Similarly, sd_get_sessions() may be used to determine all current
login sessions.
Similarly, sd_get_uids() may be used to determine all Unix users
who currently have login sessions.
Similarly, sd_get_machine_names() may be used to determine all
current virtual machines and containers on the system.
Note that the returned lists are not sorted and in an undefined
order.
Возвращаемое значение (Return value)
On success, sd_get_seats(), sd_get_sessions(), sd_get_uids() and
sd_get_machine_names() return the number of entries in the
arrays. On failure, these calls return a negative errno-style
error code.
Errors
Returned errors may indicate the following problems:
-ENOMEM
Memory allocation failed.
Примечание (Note)
These APIs are implemented as a shared library, which can be
compiled and linked to with the libsystemd pkg-config(1) file.
Смотри также (See also)
systemd(1), sd-login(3), sd_session_get_seat(3)
