mirror of
https://github.com/troglobit/finit.git
synced 2026-10-05 23:33:36 +07:00
Joachim Nilsson
f6f2895524
Try to do better by the user, by default, if no tty is specified in the finit.conf. This way the user will at least have a way to interact with the system and repair it. Signed-off-by: Joachim Nilsson <troglobit@gmail.com>
118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
/* Finit service monitor and generic API for managing svc_t structures
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*
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* Copyright (c) 2008-2010 Claudio Matsuoka <cmatsuoka@gmail.com>
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* Copyright (c) 2008-2012 Joachim Nilsson <troglobit@gmail.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef FINIT_SVC_H_
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#define FINIT_SVC_H_
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#include <errno.h>
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#include <string.h> /* strerror() */
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#include <sys/ipc.h> /* IPC_CREAT */
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#include <sys/shm.h> /* shmat() */
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#include <sys/types.h> /* pid_t */
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typedef enum {
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SVC_STOP = 0, /* Disabled */
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SVC_START, /* Enabled */
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SVC_RELOAD /* Enabled, needs restart */
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} svc_cmd_t;
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typedef enum {
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SVC_CMD_SERVICE = 0, /* Monitored, will be respawned */
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SVC_CMD_TASK, /* One-shot, runs in parallell */
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SVC_CMD_RUN /* Like task, but wait for completion */
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} svc_type_t;
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#define FINIT_SHM_ID 0x494E4954 /* "INIT", see ascii(7) */
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#define MAX_ARG_LEN 64
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#define MAX_STR_LEN 64
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#define MAX_USER_LEN 16
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#define MAX_NUM_FDS 64 /* Max number of I/O plugins */
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#define MAX_NUM_SVC 64 /* Enough? */
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#define MAX_NUM_SVC_ARGS 16
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/* Default enable for all services, can be stopped by means
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* of issuing an initctl call. E.g.
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* initctl <stop|start|restart> service */
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typedef struct svc {
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pid_t pid;
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svc_type_t type;
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int reload;
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int runlevels;
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unsigned int restart_counter; /* Incremented for each restart by service monitor. */
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char cmd[MAX_ARG_LEN];
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char args[MAX_NUM_SVC_ARGS][MAX_ARG_LEN];
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char desc[MAX_STR_LEN];
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char username[MAX_USER_LEN];
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/* For external plugins. If @cb is set a plugin is loaded.
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* @dynamic: Set by plugins that want dynamic events.
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* @dynamic_stop: Set by plugins that allow dyn. events to stop it as well.
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* @private: Can be used freely by plugin, e.g., to store "states".
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*/
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int dynamic;
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int dynamic_stop;
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int private;
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svc_cmd_t (*cb)(struct svc *svc, int event, void *event_arg);
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} svc_t;
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typedef struct svc_map svc_map_t;
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/* Put services array in shm */
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static inline svc_t *finit_svc_connect(void)
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{
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static void *ptr = (void *)-1;
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if ((void *)-1 == ptr) {
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ptr = shmat (shmget (FINIT_SHM_ID, sizeof(svc_t) * MAX_NUM_SVC,
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0600 | IPC_CREAT), NULL, 0);
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if ((void *)-1 == ptr)
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return NULL;
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}
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return (svc_t *)ptr;
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}
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svc_t *svc_new (void);
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svc_t *svc_find (char *name);
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svc_t *svc_iterator (int restart);
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void svc_runlevel (int newlevel);
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int svc_register (int type, char *line, char *username);
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int svc_id_by_name (char *name);
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svc_cmd_t svc_enabled (svc_t *svc, int event, void *arg);
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int svc_start (svc_t *svc);
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int svc_start_by_name (char *name);
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int svc_stop (svc_t *svc);
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int svc_reload (svc_t *svc);
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#endif /* FINIT_SVC_H_ */
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/**
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* Local Variables:
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* version-control: t
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* indent-tabs-mode: t
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* c-file-style: "linux"
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* End:
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*/
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