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0ad19a3f | 1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
9afe19d6 | 7 | * Daniel Lezcano <daniel.lezcano at free.fr> |
0ad19a3f | 8 | * |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
250b1eec | 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
0ad19a3f | 22 | */ |
f1a4a029 ÇO |
23 | #ifndef __LXC_MONITOR_H |
24 | #define __LXC_MONITOR_H | |
0ad19a3f | 25 | |
f9870943 | 26 | #include <limits.h> |
80f41298 | 27 | #include <sys/param.h> |
e51d4895 | 28 | #include <sys/un.h> |
2366b8a7 | 29 | #include <poll.h> |
e51d4895 | 30 | |
f2363e38 | 31 | #include "conf.h" |
80f41298 | 32 | |
eae6543d | 33 | typedef enum { |
34 | lxc_msg_state, | |
35 | lxc_msg_priority, | |
1787abca | 36 | lxc_msg_exit_code, |
eae6543d | 37 | } lxc_msg_type_t; |
38 | ||
39 | struct lxc_msg { | |
40 | lxc_msg_type_t type; | |
e51d4895 | 41 | char name[NAME_MAX+1]; |
eae6543d | 42 | int value; |
43 | }; | |
44 | ||
e51d4895 | 45 | extern int lxc_monitor_sock_name(const char *lxcpath, struct sockaddr_un *addr); |
9e60f51d DE |
46 | extern int lxc_monitor_fifo_name(const char *lxcpath, char *fifo_path, |
47 | size_t fifo_path_sz, int do_mkdirp); | |
e51d4895 | 48 | extern void lxc_monitor_send_state(const char *name, lxc_state_t state, |
9123e471 | 49 | const char *lxcpath); |
1787abca JTLB |
50 | extern void lxc_monitor_send_exit_code(const char *name, int exit_code, |
51 | const char *lxcpath); | |
e51d4895 | 52 | extern int lxc_monitord_spawn(const char *lxcpath); |
0ad19a3f | 53 | |
2366b8a7 SH |
54 | /* |
55 | * Open the monitoring mechanism for a specific container | |
56 | * The function will return an fd corresponding to the events | |
57 | * Returns a file descriptor on success, < 0 otherwise | |
58 | */ | |
59 | extern int lxc_monitor_open(const char *lxcpath); | |
60 | ||
61 | /* | |
62 | * Blocking read for the next container state change | |
63 | * @fd : the file descriptor provided by lxc_monitor_open | |
64 | * @msg : the variable which will be filled with the state | |
65 | * Returns 0 if the monitored container has exited, > 0 if | |
66 | * data was read, < 0 otherwise | |
67 | */ | |
68 | extern int lxc_monitor_read(int fd, struct lxc_msg *msg); | |
69 | ||
70 | /* | |
71 | * Blocking read for the next container state change with timeout | |
72 | * @fd : the file descriptor provided by lxc_monitor_open | |
73 | * @msg : the variable which will be filled with the state | |
74 | * @timeout : the timeout in seconds to wait for a state change | |
75 | * Returns 0 if the monitored container has exited, > 0 if | |
76 | * data was read, < 0 otherwise | |
77 | */ | |
78 | extern int lxc_monitor_read_timeout(int fd, struct lxc_msg *msg, int timeout); | |
79 | ||
80 | /* | |
81 | * Blocking read from multiple monitors for the next container state | |
82 | * change with timeout | |
83 | * @fds : struct pollfd descripting the fds to use | |
84 | * @nfds : the number of entries in fds | |
85 | * @msg : the variable which will be filled with the state | |
86 | * @timeout : the timeout in seconds to wait for a state change | |
87 | * Returns 0 if the monitored container has exited, > 0 if | |
88 | * data was read, < 0 otherwise | |
89 | */ | |
90 | extern int lxc_monitor_read_fdset(struct pollfd *fds, nfds_t nfds, struct lxc_msg *msg, | |
91 | int timeout); | |
92 | ||
93 | ||
0ad19a3f | 94 | #endif |