/*
 * Copyright (c) 2014 The DragonFly Project.  All rights reserved.
 *
 * This code is derived from software contributed to The DragonFly Project
 * by Matthew Dillon <dillon@backplane.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of The DragonFly Project nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific, prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/param.h>
#include <sys/procctl.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <sys/un.h>
#include <sys/ttycom.h>
#include <sys/devfs.h>
#include <sys/mount.h>
#include <sys/jail.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <dirent.h>
#include <assert.h>
#include <errno.h>
#include <ctype.h>
#include <pwd.h>
#include <grp.h>
#include <pthread.h>

typedef struct SvcCommand {
        int     mountdev : 1;
        int     cmdline : 1;
        int     foreground : 1;
        int     restart_some : 1;
        int     restart_all : 1;
        int     exit_mode : 1;
        int     sync_mode : 1;
        int     tail_mode : 3;
        int     jail_clean : 1;
        int     uid_mode : 1;
        int     gid_mode : 1;
        int     manual_stop : 1;
        int     empty_label : 1;        /* label not specified (vs 'all') */
        int     commanded : 1;          /* command by system operator */
        int     force_remove_files : 1;
        FILE    *fp;                    /* nominal output */
        char    *piddir;
        char    *rootdir;
        char    *jaildir;
        char    *logfile;
        char    *proctitle;
        char    *directive;
        char    *label;
        char    **ext_av;
        int     ext_ac;
        char    **orig_av;
        int     orig_ac;
        int     restart_timo;
        int     termkill_timo;
        int     debug;
        int     restart_per;
        int     restart_count;
        struct passwd pwent;
        struct group grent;
        gid_t   groups[NGROUPS];
        int     ngroups;

        pthread_cond_t logcond;         /* wait for activity */
        char    logbuf[8192];           /* must be power of 2 >= 2048 */
        int     logwindex;
        int     logcount;
        int     logfds[2];              /* logfile pipe descriptors */
        int     logfd;                  /* logfile file descriptor */
} command_t;

typedef enum {
        RS_STOPPED,     /* service died or stopped */
        RS_STARTED,     /* service running */
        RS_STOPPING1,   /* fresh pid to stop */
        RS_STOPPING2,   /* TERM sent */
        RS_STOPPING3,   /* KILL sent */
} runstate_t;

#define LOGCHUNK        1024

extern pthread_mutex_t serial_mtx;

int process_cmd(command_t *cmd, FILE *fp, int ac, char **av);
int execute_cmd(command_t *cmd);
void free_cmd(command_t *cmd);

void sfree(char **strp);
void sreplace(char **strp, const char *orig);
void sdup(char **strp);
void afree(char ***aryp);
void adup(char ***aryp);
int setup_pid_and_socket(command_t *cmd, int *lfdp, int *pfdp);
void remove_pid_and_socket(command_t *cmd, const char *label);

void remote_execute(command_t *cmd, const char *label);
void remote_listener(command_t *cmd, int lfd);
int remote_wait(void);

int execute_init(command_t *cmd);
int execute_start(command_t *cmd);
int execute_stop(command_t *cmd);
int execute_restart(command_t *cmd);
int execute_exit(command_t *cmd);
int execute_list(command_t *cmd);
int execute_status(command_t *cmd);
int execute_log(command_t *cmd);
int execute_logfile(command_t *cmd);
int execute_help(command_t *cmd);