Annotation of prex/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 <server/proc.h>
! 37: #include <server/stdmsg.h>
! 38: #include <prex/capability.h>
! 39:
! 40: #include <unistd.h>
! 41: #include <stdio.h>
! 42:
! 43: /* #define DEBUG_PROC 1 */
! 44:
! 45: #ifdef DEBUG_PROC
! 46: #define DPRINTF(a) dprintf a
! 47: #else
! 48: #define DPRINTF(a)
! 49: #endif
! 50:
! 51: #define PRIO_PROC 130 /* priority of process server */
! 52: #define PID_MAX 0x8000 /* max number for PID */
! 53:
! 54: #define ID_MAXBUCKETS 32
! 55: #define IDHASH(x) ((x) & (ID_MAXBUCKETS - 1))
! 56:
! 57: struct proc;
! 58:
! 59: /*
! 60: * Session
! 61: */
! 62: struct session {
! 63: int s_refcnt; /* reference count */
! 64: struct proc *s_leader; /* session leader */
! 65: int s_ttyhold; /* true if hold tty */
! 66: };
! 67:
! 68:
! 69: /*
! 70: * Process group
! 71: */
! 72: struct pgrp {
! 73: struct list pg_link; /* link for pgid hash */
! 74: struct list pg_members; /* list head of processes */
! 75: struct session *pg_session; /* pointer to session */
! 76: pid_t pg_pgid; /* pgrp id */
! 77: };
! 78:
! 79: /*
! 80: * Description of a process
! 81: */
! 82: struct proc {
! 83: struct list p_link; /* link for all processes */
! 84: struct proc *p_parent; /* pointer to parent process */
! 85: struct list p_children; /* list head of child processes */
! 86: struct list p_sibling; /* link for sibling processes */
! 87: struct list p_pid_link; /* link for pid hash */
! 88: struct list p_task_link; /* link for task hash */
! 89: struct list p_pgrp_link; /* link for process group */
! 90: struct pgrp *p_pgrp; /* pointer to process group */
! 91: int p_stat; /* process status S* */
! 92: int p_exitcode; /* exit code to send to parrent */
! 93: int p_vforked; /* true while processing vfork() */
! 94: pid_t p_pid; /* process id */
! 95: task_t p_task; /* task id */
! 96: cap_t p_cap; /* capability of the task */
! 97: void *p_stackbase; /* pointer to stack */
! 98: void *p_stacksaved; /* pointer to saved stack */
! 99: };
! 100:
! 101: /*
! 102: * stat codes
! 103: */
! 104: #define SRUN 1 /* running */
! 105: #define SZOMB 2 /* process terminated but not waited for */
! 106: #define SSTOP 3 /* proces stopped */
! 107:
! 108: /*
! 109: * Global variables.
! 110: */
! 111: extern struct proc initproc; /* process slot for init */
! 112: extern struct list allproc; /* list of all processes */
! 113: extern struct proc *curproc; /* current (caller) process */
! 114:
! 115: extern struct proc *proc_find(pid_t);
! 116: extern struct pgrp *pgrp_find(pid_t);
! 117: extern struct proc *task_to_proc(task_t);
! 118:
! 119: extern pid_t pid_assign(void);
! 120: extern void proc_add(struct proc *);
! 121: extern void proc_remove(struct proc *);
! 122: extern void pgrp_add(struct pgrp *);
! 123: extern void pgrp_remove(struct pgrp *);
! 124: extern void table_init(void);
! 125: extern void pid_init(void);
! 126: extern void proc_cleanup(struct proc *);
! 127: extern void vfork_end(struct proc *);
! 128: extern int kill_pg(pid_t, int);
! 129: extern void tty_init(void);
! 130:
! 131: extern int proc_getpid(struct msg *);
! 132: extern int proc_getppid(struct msg *);
! 133: extern int proc_getpgid(struct msg *);
! 134: extern int proc_setpgid(struct msg *);
! 135: extern int proc_getsid(struct msg *);
! 136: extern int proc_setsid(struct msg *);
! 137: extern int proc_fork(struct msg *);
! 138: extern int proc_exit(struct msg *);
! 139: extern int proc_stop(struct msg *);
! 140: extern int proc_waitpid(struct msg *);
! 141: extern int proc_kill(struct msg *);
! 142:
! 143: #endif /* !_PROC_H */
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