SD_GET_SEATS(3)                                                    sd_get_seats                                                    SD_GET_SEATS(3)

NAME

       sd_get_seats, sd_get_sessions, sd_get_uids - Determine available seats, sessions and logged in users

SYNOPSIS

       #include <systemd/sd-login.h>

       int sd_get_seats(char*** seats);

       int sd_get_sessions(char*** sessions);

       int sd_get_uids(char*** sessions);

DESCRIPTION

       sd_get_seats() may be used to determine all currently available local seats. Returns a NULL terminated array of seat identifiers. 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.

       Similar, sd_get_sessions() may be used to determine all current login sessions.

       Similar, sd_get_uids() may be used to determine all Unix users who currently have login sessions.

RETURN VALUE

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

NOTES

       The sd_get_seats(), sd_get_sessions() and sd_get_uids() interfaces are available as shared library, which can be compiled and linked to
       with the libsystemd-login pkg-config(1) file.

SEE ALSO

       systemd(1), sd-login(7), sd_session_get_seat(3)

AUTHOR

       Lennart Poettering <lennart@poettering.net>
           Developer

systemd                                                             10/07/2013                                                     SD_GET_SEATS(3)