/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #ifndef foosdloginhfoo #define foosdloginhfoo /*** This file is part of systemd. Copyright 2011 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <sys/types.h> /* * A few points: * * Instead of returning an empty string array or empty uid array, we * may return NULL. * * Free the data we return with libc free(). * * We return error codes as negative errno, kernel-style. 0 or * positive on success. * * These functions access data in /proc, /sys/fs/cgroup and /run. All * of these are virtual file systems, hence the accesses are * relatively cheap. */ /* Get session from PID. Note that 'shared' processes of a user are * not attached to a session, but only attached to a user. This will * return an error for system processes and 'shared' processes of a * user. */ int sd_pid_get_session(pid_t pid, char **session); /* Get UID of the owner of the session of the PID (or in case the * process is a 'shared' user process the UID of that user is * returned). This will not return the UID of the process, but rather * the UID of the owner of the cgroup the process is in. This will * return an error for system processes. */ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid); /* Get state from uid. Possible states: offline, lingering, online, active */ int sd_uid_get_state(uid_t uid, char**state); /* Return 1 if uid has session on seat. If require_active is true will * look for active sessions only. */ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat); /* Return sessions of user. If require_active is true will look for * active sessions only. Returns number of sessions as return * value. If sessions is NULL will just return number of sessions. */ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions); /* Return seats of user is on. If require_active is true will look for * active seats only. Returns number of seats. If seats is NULL will * just return number of seats.*/ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats); /* Return 1 if the session is a active */ int sd_session_is_active(const char *session); /* Determine user id of session */ int sd_session_get_uid(const char *session, uid_t *uid); /* Determine seat of session */ int sd_session_get_seat(const char *session, char **seat); /* Return active session and user of seat */ int sd_seat_get_active(const char *seat, char **session, uid_t *uid); /* Return sessions and users on seat. Returns number of sessions as * return value. If sessions is NULL returs only the number of * sessions. */ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uid, unsigned *n_uids); /* Return whether the seat is multi-session capable */ int sd_seat_can_multi_session(const char *seat); /* Get all seats, store in *seats. Returns the number of seats. If * seats is NULL only returns number of seats. */ int sd_get_seats(char ***seats); /* Get all sessions, store in *seessions. Returns the number of * sessions. If sessions is NULL only returns number of sessions. */ int sd_get_sessions(char ***sessions); /* Get all logged in users, store in *users. Returns the number of * users. If users is NULL only returns the number of users. */ int sd_get_uids(uid_t **users); /* Monitor object */ typedef struct sd_login_monitor sd_login_monitor; /* Create a new monitor. Category must be NULL, "seat", "session", * "uid" to get monitor events for the specific category (or all). */ int sd_login_monitor_new(const char *category, sd_login_monitor** ret); /* Destroys the passed monitor. Returns NULL. */ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m); /* Flushes the monitor */ int sd_login_monitor_flush(sd_login_monitor *m); /* Get FD from monitor */ int sd_login_monitor_get_fd(sd_login_monitor *m); #endif