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1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | #ifndef foosdloginhfoo | |
4 | #define foosdloginhfoo | |
5 | ||
6 | /*** | |
7 | This file is part of systemd. | |
8 | ||
9 | Copyright 2011 Lennart Poettering | |
10 | ||
11 | systemd is free software; you can redistribute it and/or modify it | |
12 | under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
15 | ||
16 | systemd is distributed in the hope that it will be useful, but | |
17 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
19 | General Public License for more details. | |
20 | ||
21 | You should have received a copy of the GNU General Public License | |
22 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
23 | ***/ | |
24 | ||
25 | #include <sys/types.h> | |
26 | ||
034a2a52 LP |
27 | /* |
28 | * A few points: | |
29 | * | |
30 | * Instead of returning an empty string array or empty uid array, we | |
31 | * may return NULL. | |
32 | * | |
33 | * Free the data we return with libc free(). | |
34 | * | |
d60ef526 LP |
35 | * We return error codes as negative errno, kernel-style. 0 or |
36 | * positive on success. | |
034a2a52 LP |
37 | * |
38 | * These functions access data in /proc, /sys/fs/cgroup and /run. All | |
39 | * of these are virtual file systems, hence the accesses are | |
40 | * relatively cheap. | |
41 | */ | |
42 | ||
43 | /* Get session from PID. Note that 'shared' processes of a user are | |
44 | * not attached to a session, but only attached to a user. This will | |
45 | * return an error for system processes and 'shared' processes of a | |
46 | * user. */ | |
74b91131 LP |
47 | int sd_pid_get_session(pid_t pid, char **session); |
48 | ||
034a2a52 LP |
49 | /* Get UID of the owner of the session of the PID (or in case the |
50 | * process is a 'shared' user process the UID of that user is | |
51 | * returned). This will not return the UID of the process, but rather | |
52 | * the UID of the owner of the cgroup the process is in. This will | |
53 | * return an error for system processes. */ | |
54 | int sd_pid_get_owner_uid(pid_t pid, uid_t *uid); | |
55 | ||
94fb446e LP |
56 | /* Get systemd unit (i.e. service) name from PID. This will return an |
57 | * error for non-service processes. */ | |
58 | int sd_pid_get_unit(pid_t, char **unit); | |
9847946e | 59 | |
74b91131 LP |
60 | /* Get state from uid. Possible states: offline, lingering, online, active */ |
61 | int sd_uid_get_state(uid_t uid, char**state); | |
62 | ||
034a2a52 LP |
63 | /* Return 1 if uid has session on seat. If require_active is true will |
64 | * look for active sessions only. */ | |
65 | int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat); | |
66 | ||
d60ef526 LP |
67 | /* Return sessions of user. If require_active is true will look for |
68 | * active sessions only. Returns number of sessions as return | |
69 | * value. If sessions is NULL will just return number of sessions. */ | |
034a2a52 | 70 | int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions); |
74b91131 | 71 | |
034a2a52 | 72 | /* Return seats of user is on. If require_active is true will look for |
d60ef526 LP |
73 | * active seats only. Returns number of seats. If seats is NULL will |
74 | * just return number of seats.*/ | |
034a2a52 | 75 | int sd_uid_get_seats(uid_t uid, int require_active, char ***seats); |
74b91131 LP |
76 | |
77 | /* Return 1 if the session is a active */ | |
78 | int sd_session_is_active(const char *session); | |
79 | ||
80 | /* Determine user id of session */ | |
81 | int sd_session_get_uid(const char *session, uid_t *uid); | |
82 | ||
83 | /* Determine seat of session */ | |
84 | int sd_session_get_seat(const char *session, char **seat); | |
85 | ||
86 | /* Return active session and user of seat */ | |
87 | int sd_seat_get_active(const char *seat, char **session, uid_t *uid); | |
88 | ||
d60ef526 | 89 | /* Return sessions and users on seat. Returns number of sessions as |
e8fbe35d | 90 | * return value. If sessions is NULL returns only the number of |
d60ef526 | 91 | * sessions. */ |
034a2a52 LP |
92 | int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uid, unsigned *n_uids); |
93 | ||
add30678 LP |
94 | /* Return whether the seat is multi-session capable */ |
95 | int sd_seat_can_multi_session(const char *seat); | |
96 | ||
d60ef526 LP |
97 | /* Get all seats, store in *seats. Returns the number of seats. If |
98 | * seats is NULL only returns number of seats. */ | |
034a2a52 LP |
99 | int sd_get_seats(char ***seats); |
100 | ||
e8fbe35d | 101 | /* Get all sessions, store in *sessions. Returns the number of |
d60ef526 | 102 | * sessions. If sessions is NULL only returns number of sessions. */ |
034a2a52 LP |
103 | int sd_get_sessions(char ***sessions); |
104 | ||
d60ef526 LP |
105 | /* Get all logged in users, store in *users. Returns the number of |
106 | * users. If users is NULL only returns the number of users. */ | |
034a2a52 LP |
107 | int sd_get_uids(uid_t **users); |
108 | ||
109 | /* Monitor object */ | |
110 | typedef struct sd_login_monitor sd_login_monitor; | |
111 | ||
112 | /* Create a new monitor. Category must be NULL, "seat", "session", | |
113 | * "uid" to get monitor events for the specific category (or all). */ | |
114 | int sd_login_monitor_new(const char *category, sd_login_monitor** ret); | |
115 | ||
116 | /* Destroys the passed monitor. Returns NULL. */ | |
117 | sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m); | |
118 | ||
119 | /* Flushes the monitor */ | |
120 | int sd_login_monitor_flush(sd_login_monitor *m); | |
121 | ||
122 | /* Get FD from monitor */ | |
123 | int sd_login_monitor_get_fd(sd_login_monitor *m); | |
124 | ||
74b91131 | 125 | #endif |