/*
* Copyright (c) 2005-2007, Kohsuke Ohtani
* All rights reserved.
*
* 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 author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*/
#ifndef _PROC_H
#define _PROC_H
#include <sys/param.h>
#include <sys/types.h>
#include <sys/list.h>
#include <sys/syslog.h>
#include <server/proc.h>
#include <server/stdmsg.h>
#include <unistd.h>
#include <stdio.h>
#ifdef DEBUG
/* #define DEBUG_PROC 1 */
#endif
#ifdef DEBUG_PROC
#define dprintf(fmt, args...) syslog(LOG_DEBUG, "proc: " fmt, ## args)
#else
#define dprintf(fmt...) do {} while (0)
#endif
#define PRIO_PROC 130 /* priority of process server */
#define PID_MAX 0x8000 /* max number for PID */
#define ID_MAXBUCKETS 32
#define IDHASH(x) ((x) & (ID_MAXBUCKETS - 1))
/*
* Process group
*/
struct pgrp {
struct list pgid_link; /* link for pgid hash */
struct list members; /* list head of processes */
pid_t pgid; /* pgrp id */
};
/*
* Description of a process.
*/
struct proc {
struct list link; /* link for all processes */
struct proc *parent; /* pointer to parent process */
struct list children; /* list head of child processes */
struct list sibling; /* link for sibling processes */
struct list pid_link; /* link for pid hash */
struct list task_link; /* link for task hash */
struct list pgrp_link; /* link for process group */
struct pgrp *pgrp; /* pointer to process group */
int stat; /* process status S* */
int exit_code; /* exit code to send to parrent */
int wait_vfork; /* true while processing vfork() */
pid_t pid; /* process id */
task_t task; /* task id */
cap_t cap; /* capability of the task */
void *stack_base; /* pointer to stack */
void *stack_saved; /* pointer to saved stack */
};
/*
* stat codes
*/
#define SRUN 1 /* running */
#define SZOMB 2 /* process terminated but not waited for */
#define SSTOP 3 /* proces stopped */
/*
* Global variables.
*/
extern struct proc initproc; /* process slot for init */
extern struct list allproc; /* list of all processes */
extern struct proc *curproc; /* current (caller) process */
extern pid_t pid_assign(void);
extern struct proc *proc_find(pid_t);
extern struct pgrp *pgrp_find(pid_t);
extern struct proc *task_to_proc(task_t);
extern void proc_add(struct proc *);
extern void proc_remove(struct proc *);
extern void pgrp_add(struct pgrp *);
extern void pgrp_remove(struct pgrp *);
extern void table_init(void);
extern void pid_init(void);
extern void proc_cleanup(struct proc *);
extern void vfork_end(struct proc *);
extern int kill_pg(pid_t, int);
extern void tty_init(void);
extern int proc_getpid(struct msg *);
extern int proc_getppid(struct msg *);
extern int proc_getpgid(struct msg *);
extern int proc_setpgid(struct msg *);
extern int proc_fork(struct msg *);
extern int proc_exit(struct msg *);
extern int proc_stop(struct msg *);
extern int proc_waitpid(struct msg *);
extern int proc_kill(struct msg *);
#endif /* !_PROC_H */