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113 lines
2.8 KiB
C
113 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-3.0-or-later */
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/*
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* Copyright (C) 2018 - David Oberhollenzer
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef SERVICE_H
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#define SERVICE_H
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#include <sys/types.h>
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enum {
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/*
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Start the service in the background and continue with
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other services. The service will eventually terminate.
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*/
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SVC_ONCE = 0,
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SVC_WAIT, /* run service and wait until it finishes */
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/*
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Similar to SVC_ONCE, but restart the service when
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it terminates.
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*/
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SVC_RESPAWN,
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};
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enum {
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TGT_BOOT = 0, /* run service when the system boots */
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TGT_SHUTDOWN, /* run service when at system shut down */
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TGT_REBOOT, /* run service when during system reboot */
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TGT_CAD, /* run service when CTRL+ALT+DEL is pressed */
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TGT_MAX
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};
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typedef struct exec_t {
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struct exec_t *next;
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int argc; /* number of elements in argument vector */
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char args[]; /* argument vectot string blob */
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} exec_t;
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typedef struct service_t {
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struct service_t *next;
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int type; /* SVC_* service type */
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int target; /* TGT_* service target */
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char *desc; /* description string */
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char *ctty; /* controlling tty or log file */
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int rspwn_limit; /* maximum respawn count */
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/* linked list of command lines to execute */
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exec_t *exec;
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char *before; /* services that must be executed later */
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char *after; /* services that must be executed first */
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int num_before;
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int num_after;
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pid_t pid;
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int status; /* process exit status */
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char name[]; /* canonical service name */
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} service_t;
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typedef struct {
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service_t *targets[TGT_MAX];
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} service_list_t;
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/*
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Read a service from a file.
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*/
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service_t *rdsvc(int dirfd, const char *filename);
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void delsvc(service_t *svc);
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/*
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Rebuild a service list by scanning a directory and parsing all
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service descriptions.
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Returns 0 on success, -1 on failure. The function takes care of
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printing error messages on failure.
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*/
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int svcscan(const char *directory, service_list_t *list);
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void del_svc_list(service_list_t *list);
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/*
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Sort a list of services by dependencies.
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*/
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service_t *svc_tsort(service_t *list);
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const char *svc_type_to_string(int type);
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int svc_type_from_string(const char *type);
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const char *svc_target_to_string(int target);
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int svc_target_from_string(const char *target);
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#endif /* SERVICE_H */
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