|
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | NOTES | SEE ALSO | COLOPHON |
SD_GET_SEATS(3) sd_get_seats SD_GET_SEATS(3)
sd_get_seats, sd_get_sessions, sd_get_uids, sd_get_machine_names -
Determine available seats, sessions, logged in users and virtual
machines/containers
#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);
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.
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.
Returned errors may indicate the following problems:
-ENOMEM
Memory allocation failed.
The sd_get_seats(), sd_get_sessions(), sd_get_uids() and
sd_get_machine_names() interfaces are available as a shared library,
which can be compiled and linked to with the libsystemd pkg-config(1)
file.
systemd(1), sd-login(3), sd_session_get_seat(3)
This page is part of the systemd (systemd system and service manager)
project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have a bug
report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2017-07-05. If you dis‐
cover any rendering problems in this HTML version of the page, or you
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you have corrections or improvements to the information in this
COLOPHON (which is not part of the original manual page), send a mail
to man-pages@man7.org
systemd 234 SD_GET_SEATS(3)
Pages that refer to this page: sd-login(3), sd_login_monitor_new(3), systemd.directives(7), systemd.index(7)