Man page or keyword search:   man All Sections 1 - General Commands 2 - System Calls 3 - Subroutines, Functions 4 - Special Files 5 - File Formats 6 - Games and Screensavers 7 - Macros and Conventions 8 - Maintenence Commands 9 - Kernel Interface New Commands Server 4.4BSD AIX Alpinelinux Archlinux Aros BSDOS BSDi Bifrost CentOS Cygwin Darwin Debian DigitalUNIX DragonFly ElementaryOS Fedora FreeBSD Gentoo GhostBSD HP-UX Haiku Hurd IRIX Inferno JazzOS Kali Knoppix LinuxMint MacOSX Mageia Mandriva Manjaro Minix MirBSD NeXTSTEP NetBSD OPENSTEP OSF1 OpenBSD OpenDarwin OpenIndiana OpenMandriva OpenServer OpenSuSE OpenVMS Oracle PC-BSD Peanut Pidora Plan9 QNX Raspbian RedHat Scientific Slackware SmartOS Solaris SuSE SunOS Syllable Tru64 UNIXv7 Ubuntu Ultrix UnixWare Xenix YellowDog aLinux   31170 pages apropos Keyword Search (all sections) Output format html ascii pdf view pdf save postscript

SD_SEAT_GET_ACTIVE(3)	      sd_seat_get_active	 SD_SEAT_GET_ACTIVE(3)

NAME
       sd_seat_get_active, sd_seat_get_sessions, sd_seat_can_multi_session -
       Determine state of a specific seat

SYNOPSIS
       #include <systemd/sd-login.h>

       int sd_seat_get_active(const char* seat, char** session, uid_t* uid);

       int sd_seat_get_sessions(const char* seat, char*** sessions,
				uid_t** uid, unsigned* n_uids);

       int sd_seat_can_multi_session(const char* session);

DESCRIPTION
       sd_seat_get_active() may be used to determine which session is
       currently active on a seat, if there is any. Returns the session
       identifier and the user identifier of the Unix user the session is
       belonging to. Either the session or the user identifier parameter can
       be be passed NULL, in case only one of the parameters shall be queried.
       The returned string needs to be freed with the libc free(3) call after
       use.

       sd_seat_get_sessions() may be used to determine all sessions on the
       specified seat. Returns two arrays, one (NULL terminated) with the
       session identifiers of the sessions and one with the user identifiers
       of the Unix users the sessions belong to. An additional parameter may
       be used to return the number of entries in the latter array. The two
       arrays and the latter parameter may be passed as NULL in case these
       values need not to be determined. The arrays and the strings referenced
       by them 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.

       sd_seat_can_multi_session() may be used to determine whether a specific
       seat is capable of multi-session, i.e. allows multiple login sessions
       in parallel (whith only one being active at a time).

RETURN VALUE
       On success sd_seat_get_active() return return 0 or a positive integer.
       On success sd_seat_get_sessions() returns the number of entries in the
       session identifier array. If the test succeeds
       sd_seat_can_multi_session returns a positive integer, if it fails 0. On
       failure, these calls return a negative errno-style error code.

NOTES
       The sd_seat_get_active(), sd_seat_get_sessions(), and
       sd_seat_can_multi_session() 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				  05/23/2012		 SD_SEAT_GET_ACTIVE(3)

Vote for polarhome