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   1 /*
   2  * Copyright (c) 2005-2007, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #ifndef _PROC_H
  31 #define _PROC_H
  33 #include <sys/cdefs.h>
  34 #include <sys/param.h>
  35 #include <sys/types.h>
  36 #include <sys/list.h>
  37 #include <ipc/proc.h>
  38 #include <ipc/ipc.h>
  39 #include <sys/capability.h>
  41 #include <unistd.h>
  42 #include <stdio.h>
  43 #include <assert.h>
  45 /* #define DEBUG_PROC 1 */
  47 #ifdef DEBUG_PROC
  48 #define DPRINTF(a)      dprintf a
  49 #define ASSERT(e)       dassert(e)
  50 #else
  51 #define DPRINTF(a)
  52 #define ASSERT(e)
  53 #endif
  55 #define PID_MAX         0x8000          /* max number for PID */
  57 #define ID_MAXBUCKETS   32
  58 #define IDHASH(x)       ((x) & (ID_MAXBUCKETS - 1))
  60 struct proc;
  62 /*
  63  * Session
  64  */
  65 struct session {
  66         int             s_refcnt;       /* reference count */
  67         struct proc     *s_leader;      /* session leader */
  68         int             s_ttyhold;      /* true if hold tty */
  69 };
  72 /*
  73  * Process group
  74  */
  75 struct pgrp {
  76         struct list     pg_link;        /* link for pgid hash */
  77         struct list     pg_members;     /* list head of processes */
  78         struct session  *pg_session;    /* pointer to session */
pid_t           pg_pgid;        /* pgrp id */
  80 };
  82 /*
  83  * Description of a process
  84  */
  85 struct proc {
  86         struct list     p_link;         /* link for all processes */
  87         struct proc     *p_parent;      /* pointer to parent process */
  88         struct list     p_children;     /* list head of child processes */
  89         struct list     p_sibling;      /* link for sibling processes */
  90         struct list     p_pid_link;     /* link for pid hash */
  91         struct list     p_task_link;    /* link for task hash */
  92         struct list     p_pgrp_link;    /* link for process group */
  93         struct pgrp     *p_pgrp;        /* pointer to process group */
  94         int             p_stat;         /* process status S* */
  95         int             p_flag;         /* P_* flags */
  96         int             p_exitcode;     /* exit code to send to parrent */
  97         int             p_vforked;      /* true while processing vfork() */
  98         int             p_invfork;      /* true if child of vfork() */
pid_t           p_pid;          /* process id */
task_t          p_task;         /* task id */
 101         void            *p_stackbase;   /* pointer to stack */
 102         void            *p_stacksaved;  /* pointer to saved stack */
 103 };
 105 /* Status values. */
 106 #define SRUN    1       /* running */
 107 #define SZOMB   2       /* process terminated but not waited for */
 108 #define SSTOP   3       /* proces stopped */
 110 /* These flags are kept in p_flags. */
 111 #define P_TRACED        0x00001         /* debugged process being traced. */
 113 /*
 114  * Global variables.
 115  */
 116 extern struct proc initproc;            /* process slot for init */
 117 extern struct list allproc;             /* list of all processes */
 118 extern struct proc *curproc;            /* current (caller) process */
 119 extern int perrno;                      /* errno */
__BEGIN_DECLS
 123 /* pid.c */
pid_t   sys_getpid(void);
pid_t   sys_getppid(void);
 126 int     sys_getpgid(pid_t, pid_t *);
 127 int     sys_setpgid(pid_t, pid_t);
 128 int     sys_getsid(pid_t, pid_t *);
 129 int     sys_setsid(pid_t *);
 131 /* fork.c */
 132 int     newproc(struct proc *, pid_t, task_t);
 133 int     sys_fork(task_t, int, pid_t *);
 134 void    cleanup(struct proc *);
 135 void    vfork_end(struct proc *);
 137 /* exit.c */
 138 int     sys_exit(int);
 139 int     stop(int);
 140 int     sys_waitpid(pid_t, int *, int, pid_t *);
 142 /* kill.c */
 143 int     sys_kill(pid_t pid, int sig);
 144 int     kill_pg(pid_t, int);
 146 /* hash.c */
 147 struct proc *p_find(pid_t);
 148 struct pgrp *pg_find(pid_t);
 149 struct proc *task_to_proc(task_t);
 150 void    p_add(struct proc *);
 151 void    p_remove(struct proc *);
 152 void    pg_add(struct pgrp *);
 153 void    pg_remove(struct pgrp *);
 154 void    table_init(void);
 156 /* tty.c */
 157 void    tty_init(void);
__END_DECLS
 161 #endif /* !_PROC_H */