| kern_cons.c (5) | kern_cons.c (301) |
|---|---|
| 1/* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1991 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. --- 42 unchanged lines hidden (view full) --- 51#include "sys/proc.h" 52#include "sys/user.h" 53#include "sys/systm.h" 54#include "sys/buf.h" 55#include "sys/ioctl.h" 56#include "sys/tty.h" 57#include "sys/file.h" 58#include "sys/conf.h" | 1/* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1991 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. --- 42 unchanged lines hidden (view full) --- 51#include "sys/proc.h" 52#include "sys/user.h" 53#include "sys/systm.h" 54#include "sys/buf.h" 55#include "sys/ioctl.h" 56#include "sys/tty.h" 57#include "sys/file.h" 58#include "sys/conf.h" |
| 59#include "sys/vnode.h" |
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| 59 60#include "cons.h" 61 62/* XXX - all this could be autoconfig()ed */ 63int pccnprobe(), pccninit(), pccngetc(), pccnputc(); 64#include "com.h" 65#if NCOM > 0 66int comcnprobe(), comcninit(), comcngetc(), comcnputc(); --- 33 unchanged lines hidden (view full) --- 100 return; 101 /* 102 * Turn on console 103 */ 104 cn_tty = cp->cn_tp; 105 (*cp->cn_init)(cp); 106} 107 | 60 61#include "cons.h" 62 63/* XXX - all this could be autoconfig()ed */ 64int pccnprobe(), pccninit(), pccngetc(), pccnputc(); 65#include "com.h" 66#if NCOM > 0 67int comcnprobe(), comcninit(), comcngetc(), comcnputc(); --- 33 unchanged lines hidden (view full) --- 101 return; 102 /* 103 * Turn on console 104 */ 105 cn_tty = cp->cn_tp; 106 (*cp->cn_init)(cp); 107} 108 |
| 109static struct vnode *cnopenvp = NULLVP; 110 111 |
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| 108cnopen(dev, flag, mode, p) 109 dev_t dev; 110 int flag, mode; 111 struct proc *p; 112{ | 112cnopen(dev, flag, mode, p) 113 dev_t dev; 114 int flag, mode; 115 struct proc *p; 116{ |
| 117 int error; 118 119 |
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| 113 if (cn_tab == NULL) 114 return (0); 115 dev = cn_tab->cn_dev; | 120 if (cn_tab == NULL) 121 return (0); 122 dev = cn_tab->cn_dev; |
| 123 if (cnopenvp == NULLVP) 124 if ((error = getdevvp(dev, &cnopenvp, VCHR))) { 125 printf("cnopen: getdevvp returned %d !\n", error); 126 return(error); 127 } |
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| 116 return ((*cdevsw[major(dev)].d_open)(dev, flag, mode, p)); 117} 118 119cnclose(dev, flag, mode, p) 120 dev_t dev; 121 int flag, mode; 122 struct proc *p; 123{ | 128 return ((*cdevsw[major(dev)].d_open)(dev, flag, mode, p)); 129} 130 131cnclose(dev, flag, mode, p) 132 dev_t dev; 133 int flag, mode; 134 struct proc *p; 135{ |
| 136 int error; 137 138 |
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| 124 if (cn_tab == NULL) 125 return (0); 126 dev = cn_tab->cn_dev; | 139 if (cn_tab == NULL) 140 return (0); 141 dev = cn_tab->cn_dev; |
| 127 return ((*cdevsw[major(dev)].d_close)(dev, flag, mode, p)); | 142 if (vcount(cnopenvp) <= 1) 143 error = (*cdevsw[major(dev)].d_close)(dev, flag, mode, p); 144 else 145 error = 0; 146 if (error == 0) { 147 vrele(cnopenvp); 148 cnopenvp = NULLVP; 149 return(error); 150 } |
| 128} 129 130cnread(dev, uio, flag) 131 dev_t dev; 132 struct uio *uio; 133{ 134 if (cn_tab == NULL) 135 return (0); --- 78 unchanged lines hidden --- | 151} 152 153cnread(dev, uio, flag) 154 dev_t dev; 155 struct uio *uio; 156{ 157 if (cn_tab == NULL) 158 return (0); --- 78 unchanged lines hidden --- |