1SD_GET_SEATS(3)                  sd_get_seats                  SD_GET_SEATS(3)
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NAME

6       sd_get_seats, sd_get_sessions, sd_get_uids, sd_get_machine_names -
7       Determine available seats, sessions, logged in users and virtual
8       machines/containers
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SYNOPSIS

11       #include <systemd/sd-login.h>
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13       int sd_get_seats(char ***seats);
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15       int sd_get_sessions(char ***sessions);
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17       int sd_get_uids(uid_t **users);
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19       int sd_get_machine_names(char ***machines);
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DESCRIPTION

22       sd_get_seats() may be used to determine all currently available local
23       seats. Returns a NULL terminated array of seat identifiers. The
24       returned array and all strings it references need to be freed with the
25       libc free(3) call after use. Note that instead of an empty array NULL
26       may be returned and should be considered equivalent to an empty array.
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28       Similarly, sd_get_sessions() may be used to determine all current login
29       sessions.
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31       Similarly, sd_get_uids() may be used to determine all Unix users who
32       currently have login sessions.
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34       Similarly, sd_get_machine_names() may be used to determine all current
35       virtual machines and containers on the system.
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37       Note that the returned lists are not sorted and in an undefined order.
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RETURN VALUE

40       On success, sd_get_seats(), sd_get_sessions(), sd_get_uids() and
41       sd_get_machine_names() return the number of entries in the arrays. On
42       failure, these calls return a negative errno-style error code.
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NOTES

45       The sd_get_seats(), sd_get_sessions(), sd_get_uids() and
46       sd_get_machine_names() interfaces are available as a shared library,
47       which can be compiled and linked to with the libsystemd pkg-config(1)
48       file.
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SEE ALSO

51       systemd(1), sd-login(3), sd_session_get_seat(3)
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55systemd 219                                                    SD_GET_SEATS(3)
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