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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 | |
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12 | under the terms of the GNU Lesser General Public License as published by |
13 | the Free Software Foundation; either version 2.1 of the License, or | |
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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 | |
5430f7f2 | 19 | Lesser General Public License for more details. |
74b91131 | 20 | |
5430f7f2 | 21 | You should have received a copy of the GNU Lesser General Public License |
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22 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
23 | ***/ | |
24 | ||
25 | #include <sys/types.h> | |
667c24a6 | 26 | #include <inttypes.h> |
74b91131 | 27 | |
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28 | #ifdef __cplusplus |
29 | extern "C" { | |
30 | #endif | |
31 | ||
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32 | /* |
33 | * A few points: | |
34 | * | |
35 | * Instead of returning an empty string array or empty uid array, we | |
36 | * may return NULL. | |
37 | * | |
ee1f44bd LP |
38 | * Free the data the library returns with libc free(). String arrays |
39 | * are NULL terminated and you need to free the array itself in | |
40 | * addition to the strings contained. | |
034a2a52 | 41 | * |
d60ef526 LP |
42 | * We return error codes as negative errno, kernel-style. 0 or |
43 | * positive on success. | |
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44 | * |
45 | * These functions access data in /proc, /sys/fs/cgroup and /run. All | |
46 | * of these are virtual file systems, hence the accesses are | |
47 | * relatively cheap. | |
cb07866b LP |
48 | * |
49 | * See sd-login(3) for more information. | |
034a2a52 LP |
50 | */ |
51 | ||
52 | /* Get session from PID. Note that 'shared' processes of a user are | |
53 | * not attached to a session, but only attached to a user. This will | |
54 | * return an error for system processes and 'shared' processes of a | |
55 | * user. */ | |
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56 | int sd_pid_get_session(pid_t pid, char **session); |
57 | ||
034a2a52 LP |
58 | /* Get UID of the owner of the session of the PID (or in case the |
59 | * process is a 'shared' user process the UID of that user is | |
60 | * returned). This will not return the UID of the process, but rather | |
61 | * the UID of the owner of the cgroup the process is in. This will | |
62 | * return an error for system processes. */ | |
63 | int sd_pid_get_owner_uid(pid_t pid, uid_t *uid); | |
64 | ||
97e13058 LP |
65 | /* Get systemd unit (i.e. service) name from PID, for system |
66 | * services. This will return an error for non-service processes. */ | |
7027ff61 | 67 | int sd_pid_get_unit(pid_t pid, char **unit); |
9847946e | 68 | |
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69 | /* Get systemd unit (i.e. service) name from PID, for user |
70 | * services. This will return an error for non-user-service | |
71 | * processes. */ | |
7027ff61 LP |
72 | int sd_pid_get_user_unit(pid_t pid, char **unit); |
73 | ||
74 | /* Get machine name from PID, for processes assigned to VM or | |
75 | * container. This will return an error for non-service processes. */ | |
76 | int sd_pid_get_machine_name(pid_t pid, char **name); | |
97e13058 | 77 | |
0604381b | 78 | /* Get state from uid. Possible states: offline, lingering, online, active, closing */ |
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79 | int sd_uid_get_state(uid_t uid, char**state); |
80 | ||
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81 | /* Return 1 if uid has session on seat. If require_active is true will |
82 | * look for active sessions only. */ | |
83 | int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat); | |
84 | ||
d60ef526 LP |
85 | /* Return sessions of user. If require_active is true will look for |
86 | * active sessions only. Returns number of sessions as return | |
87 | * value. If sessions is NULL will just return number of sessions. */ | |
034a2a52 | 88 | int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions); |
74b91131 | 89 | |
034a2a52 | 90 | /* Return seats of user is on. If require_active is true will look for |
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91 | * active seats only. Returns number of seats. If seats is NULL will |
92 | * just return number of seats.*/ | |
034a2a52 | 93 | int sd_uid_get_seats(uid_t uid, int require_active, char ***seats); |
74b91131 | 94 | |
0604381b | 95 | /* Return 1 if the session is a active. */ |
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96 | int sd_session_is_active(const char *session); |
97 | ||
0604381b LP |
98 | /* Get state from session. Possible states: online, active, closing |
99 | * (This function is a more generic version of | |
100 | * sd_session_is_active().) */ | |
101 | int sd_session_get_state(const char *sessio, char **state); | |
102 | ||
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103 | /* Determine user id of session */ |
104 | int sd_session_get_uid(const char *session, uid_t *uid); | |
105 | ||
106 | /* Determine seat of session */ | |
107 | int sd_session_get_seat(const char *session, char **seat); | |
108 | ||
eff40633 LP |
109 | /* Determine the (PAM) service name this session was registered by. */ |
110 | int sd_session_get_service(const char *session, char **service); | |
111 | ||
51f58f08 LP |
112 | /* Determine the type of this session, i.e. one of "tty", "x11" or "unspecified". */ |
113 | int sd_session_get_type(const char *session, char **type); | |
114 | ||
115 | /* Determine the class of this session, i.e. one of "user", "greeter" or "lock-screen". */ | |
e09a9a35 | 116 | int sd_session_get_class(const char *session, char **clazz); |
51f58f08 | 117 | |
fc8af9ff LP |
118 | /* Determine the X11 display of this session. */ |
119 | int sd_session_get_display(const char *session, char **display); | |
120 | ||
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121 | /* Determine the TTY of this session. */ |
122 | int sd_session_get_tty(const char *session, char **display); | |
123 | ||
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124 | /* Return active session and user of seat */ |
125 | int sd_seat_get_active(const char *seat, char **session, uid_t *uid); | |
126 | ||
d60ef526 | 127 | /* Return sessions and users on seat. Returns number of sessions as |
e8fbe35d | 128 | * return value. If sessions is NULL returns only the number of |
d60ef526 | 129 | * sessions. */ |
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130 | int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uid, unsigned *n_uids); |
131 | ||
add30678 LP |
132 | /* Return whether the seat is multi-session capable */ |
133 | int sd_seat_can_multi_session(const char *seat); | |
134 | ||
20747498 LP |
135 | /* Return whether the seat is TTY capable, i.e. suitable for showing console UIs */ |
136 | int sd_seat_can_tty(const char *seat); | |
137 | ||
138 | /* Return whether the seat is graphics capable, i.e. suitable for showing graphical UIs */ | |
139 | int sd_seat_can_graphical(const char *seat); | |
140 | ||
d60ef526 LP |
141 | /* Get all seats, store in *seats. Returns the number of seats. If |
142 | * seats is NULL only returns number of seats. */ | |
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143 | int sd_get_seats(char ***seats); |
144 | ||
e8fbe35d | 145 | /* Get all sessions, store in *sessions. Returns the number of |
d60ef526 | 146 | * sessions. If sessions is NULL only returns number of sessions. */ |
034a2a52 LP |
147 | int sd_get_sessions(char ***sessions); |
148 | ||
d60ef526 LP |
149 | /* Get all logged in users, store in *users. Returns the number of |
150 | * users. If users is NULL only returns the number of users. */ | |
034a2a52 LP |
151 | int sd_get_uids(uid_t **users); |
152 | ||
153 | /* Monitor object */ | |
154 | typedef struct sd_login_monitor sd_login_monitor; | |
155 | ||
156 | /* Create a new monitor. Category must be NULL, "seat", "session", | |
157 | * "uid" to get monitor events for the specific category (or all). */ | |
158 | int sd_login_monitor_new(const char *category, sd_login_monitor** ret); | |
159 | ||
160 | /* Destroys the passed monitor. Returns NULL. */ | |
161 | sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m); | |
162 | ||
163 | /* Flushes the monitor */ | |
164 | int sd_login_monitor_flush(sd_login_monitor *m); | |
165 | ||
166 | /* Get FD from monitor */ | |
167 | int sd_login_monitor_get_fd(sd_login_monitor *m); | |
168 | ||
dace83cb LP |
169 | /* Get poll() mask to monitor */ |
170 | int sd_login_monitor_get_events(sd_login_monitor *m); | |
171 | ||
667c24a6 LP |
172 | /* Get timeout for poll(), as usec value relative to CLOCK_MONOTONIC's epoch */ |
173 | int sd_login_monitor_get_timeout(sd_login_monitor *m, uint64_t *timeout_usec); | |
174 | ||
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175 | #ifdef __cplusplus |
176 | } | |
177 | #endif | |
178 | ||
74b91131 | 179 | #endif |