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Annotation of prex-old/usr/server/proc/proc.h, Revision 1.1

1.1     ! nbrk        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:  */
        !            29:
        !            30: #ifndef _PROC_H
        !            31: #define _PROC_H
        !            32:
        !            33: #include <sys/param.h>
        !            34: #include <sys/types.h>
        !            35: #include <sys/list.h>
        !            36: #include <sys/syslog.h>
        !            37: #include <server/proc.h>
        !            38: #include <server/stdmsg.h>
        !            39:
        !            40: #include <unistd.h>
        !            41: #include <stdio.h>
        !            42:
        !            43: #ifdef DEBUG
        !            44: /* #define DEBUG_PROC 1 */
        !            45: #endif
        !            46:
        !            47: #ifdef DEBUG_PROC
        !            48: #define dprintf(fmt, args...)  syslog(LOG_DEBUG, "proc: " fmt, ## args)
        !            49: #else
        !            50: #define dprintf(fmt...)                do {} while (0)
        !            51: #endif
        !            52:
        !            53: #define PRIO_PROC      130             /* priority of process server */
        !            54: #define PID_MAX                0x8000          /* max number for PID */
        !            55:
        !            56: #define ID_MAXBUCKETS  32
        !            57: #define IDHASH(x)      ((x) & (ID_MAXBUCKETS - 1))
        !            58:
        !            59: /*
        !            60:  * Process group
        !            61:  */
        !            62: struct pgrp {
        !            63:        struct list     pgid_link;      /* link for pgid hash */
        !            64:        struct list     members;        /* list head of processes */
        !            65:        pid_t           pgid;           /* pgrp id */
        !            66: };
        !            67:
        !            68: /*
        !            69:  * Description of a process.
        !            70:  */
        !            71: struct proc {
        !            72:        struct list     link;           /* link for all processes */
        !            73:        struct proc     *parent;        /* pointer to parent process */
        !            74:        struct list     children;       /* list head of child processes */
        !            75:        struct list     sibling;        /* link for sibling processes */
        !            76:        struct list     pid_link;       /* link for pid hash */
        !            77:        struct list     task_link;      /* link for task hash */
        !            78:        struct list     pgrp_link;      /* link for process group */
        !            79:        struct pgrp     *pgrp;          /* pointer to process group */
        !            80:        int             stat;           /* process status S* */
        !            81:        int             exit_code;      /* exit code to send to parrent */
        !            82:        int             wait_vfork;     /* true while processing vfork() */
        !            83:        pid_t           pid;            /* process id */
        !            84:        task_t          task;           /* task id */
        !            85:        cap_t           cap;            /* capability of the task */
        !            86:        void            *stack_base;    /* pointer to stack */
        !            87:        void            *stack_saved;   /* pointer to saved stack */
        !            88: };
        !            89:
        !            90: /*
        !            91:  * stat codes
        !            92:  */
        !            93: #define SRUN   1       /* running */
        !            94: #define SZOMB  2       /* process terminated but not waited for */
        !            95: #define SSTOP  3       /* proces stopped */
        !            96:
        !            97: /*
        !            98:  * Global variables.
        !            99:  */
        !           100: extern struct proc initproc;           /* process slot for init */
        !           101: extern struct list allproc;            /* list of all processes */
        !           102: extern struct proc *curproc;           /* current (caller) process */
        !           103:
        !           104: extern pid_t pid_assign(void);
        !           105: extern struct proc *proc_find(pid_t);
        !           106: extern struct pgrp *pgrp_find(pid_t);
        !           107: extern struct proc *task_to_proc(task_t);
        !           108: extern void proc_add(struct proc *);
        !           109: extern void proc_remove(struct proc *);
        !           110: extern void pgrp_add(struct pgrp *);
        !           111: extern void pgrp_remove(struct pgrp *);
        !           112: extern void table_init(void);
        !           113: extern void pid_init(void);
        !           114: extern void proc_cleanup(struct proc *);
        !           115: extern void vfork_end(struct proc *);
        !           116: extern int kill_pg(pid_t, int);
        !           117: extern void tty_init(void);
        !           118:
        !           119: extern int proc_getpid(struct msg *);
        !           120: extern int proc_getppid(struct msg *);
        !           121: extern int proc_getpgid(struct msg *);
        !           122: extern int proc_setpgid(struct msg *);
        !           123: extern int proc_fork(struct msg *);
        !           124: extern int proc_exit(struct msg *);
        !           125: extern int proc_stop(struct msg *);
        !           126: extern int proc_waitpid(struct msg *);
        !           127: extern int proc_kill(struct msg *);
        !           128:
        !           129: #endif /* !_PROC_H */