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pty.c (61473) pty.c (64880)
1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. 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

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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
1/*
2 * Copyright (c) 1982, 1986, 1989, 1993
3 * The Regents of the University of California. 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

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26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95
34 * $FreeBSD: head/sys/kern/tty_pty.c 61473 2000-06-10 07:12:40Z peter $
34 * $FreeBSD: head/sys/kern/tty_pty.c 64880 2000-08-20 21:34:39Z phk $
35 */
36
37/*
38 * Pseudo-teletype Driver
39 * (Actually two drivers, requiring two entries in 'cdevsw')
40 */
41#include "opt_compat.h"
35 */
36
37/*
38 * Pseudo-teletype Driver
39 * (Actually two drivers, requiring two entries in 'cdevsw')
40 */
41#include "opt_compat.h"
42#include "opt_devfs.h"
42#include <sys/param.h>
43#include <sys/systm.h>
44#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
45#include <sys/ioctl_compat.h>
46#endif
47#include <sys/proc.h>
48#include <sys/tty.h>
49#include <sys/conf.h>
50#include <sys/fcntl.h>
51#include <sys/poll.h>
52#include <sys/kernel.h>
53#include <sys/vnode.h>
54#include <sys/signalvar.h>
55#include <sys/malloc.h>
56
43#include <sys/param.h>
44#include <sys/systm.h>
45#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
46#include <sys/ioctl_compat.h>
47#endif
48#include <sys/proc.h>
49#include <sys/tty.h>
50#include <sys/conf.h>
51#include <sys/fcntl.h>
52#include <sys/poll.h>
53#include <sys/kernel.h>
54#include <sys/vnode.h>
55#include <sys/signalvar.h>
56#include <sys/malloc.h>
57
58#ifdef DEVFS
59#include <sys/eventhandler.h>
60#include <fs/devfs/devfs.h>
61#endif
62
57MALLOC_DEFINE(M_PTY, "ptys", "pty data structures");
58
59static void ptsstart __P((struct tty *tp));
60static void ptsstop __P((struct tty *tp, int rw));
61static void ptcwakeup __P((struct tty *tp, int flag));
63MALLOC_DEFINE(M_PTY, "ptys", "pty data structures");
64
65static void ptsstart __P((struct tty *tp));
66static void ptsstop __P((struct tty *tp, int rw));
67static void ptcwakeup __P((struct tty *tp, int flag));
62static void ptyinit __P((int n));
68static dev_t ptyinit __P((int n));
63
64static d_open_t ptsopen;
65static d_close_t ptsclose;
66static d_read_t ptsread;
67static d_write_t ptswrite;
68static d_ioctl_t ptyioctl;
69static d_open_t ptcopen;
70static d_close_t ptcclose;

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130 * This function creates and initializes a pts/ptc pair
131 *
132 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
133 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
134 *
135 * XXX: define and add mapping of upper minor bits to allow more
136 * than 256 ptys.
137 */
69
70static d_open_t ptsopen;
71static d_close_t ptsclose;
72static d_read_t ptsread;
73static d_write_t ptswrite;
74static d_ioctl_t ptyioctl;
75static d_open_t ptcopen;
76static d_close_t ptcclose;

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136 * This function creates and initializes a pts/ptc pair
137 *
138 * pts == /dev/tty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
139 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv]
140 *
141 * XXX: define and add mapping of upper minor bits to allow more
142 * than 256 ptys.
143 */
138static void
144static dev_t
139ptyinit(n)
140 int n;
141{
142 dev_t devs, devc;
143 char *names = "pqrsPQRS";
144 struct pt_ioctl *pt;
145
146 /* For now we only map the lower 8 bits of the minor */
147 if (n & ~0xff)
145ptyinit(n)
146 int n;
147{
148 dev_t devs, devc;
149 char *names = "pqrsPQRS";
150 struct pt_ioctl *pt;
151
152 /* For now we only map the lower 8 bits of the minor */
153 if (n & ~0xff)
148 return;
154 return (NODEV);
149
150 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK);
151 bzero(pt, sizeof(*pt));
152 pt->devs = devs = make_dev(&pts_cdevsw, n,
153 0, 0, 0666, "tty%c%r", names[n / 32], n % 32);
154 pt->devc = devc = make_dev(&ptc_cdevsw, n,
155 0, 0, 0666, "pty%c%r", names[n / 32], n % 32);
156
157 devs->si_drv1 = devc->si_drv1 = pt;
158 devs->si_tty = devc->si_tty = &pt->pt_tty;
159 ttyregister(&pt->pt_tty);
155
156 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK);
157 bzero(pt, sizeof(*pt));
158 pt->devs = devs = make_dev(&pts_cdevsw, n,
159 0, 0, 0666, "tty%c%r", names[n / 32], n % 32);
160 pt->devc = devc = make_dev(&ptc_cdevsw, n,
161 0, 0, 0666, "pty%c%r", names[n / 32], n % 32);
162
163 devs->si_drv1 = devc->si_drv1 = pt;
164 devs->si_tty = devc->si_tty = &pt->pt_tty;
165 ttyregister(&pt->pt_tty);
166 return (devc);
160}
161
162/*ARGSUSED*/
163static int
164ptsopen(dev, flag, devtype, p)
165 dev_t dev;
166 int flag, devtype;
167 struct proc *p;
168{
169 register struct tty *tp;
170 int error;
167}
168
169/*ARGSUSED*/
170static int
171ptsopen(dev, flag, devtype, p)
172 dev_t dev;
173 int flag, devtype;
174 struct proc *p;
175{
176 register struct tty *tp;
177 int error;
171 int minr;
172 dev_t nextdev;
173 struct pt_ioctl *pti;
174
178 struct pt_ioctl *pti;
179
180#ifndef DEVFS
181 {
182 int minr = lminor(dev);
175 /*
183 /*
176 * XXX: Gross hack for DEVFS:
177 * If we openned this device, ensure we have the
178 * next one too, so people can open it.
179 */
184 * If we openned this device, ensure we have the
185 * next one too, so people can open it.
186 */
180 minr = lminor(dev);
181 if (minr < 255) {
187 if (minr < 255) {
182 nextdev = makedev(major(dev), minr + 1);
188 dev_t nextdev = makedev(major(dev), minr + 1);
183 if (!nextdev->si_drv1) {
184 ptyinit(minr + 1);
185 }
186 }
187 if (!dev->si_drv1)
188 ptyinit(minor(dev));
189 if (!nextdev->si_drv1) {
190 ptyinit(minr + 1);
191 }
192 }
193 if (!dev->si_drv1)
194 ptyinit(minor(dev));
195 }
196#endif
189 if (!dev->si_drv1)
190 return(ENXIO);
191 pti = dev->si_drv1;
192 tp = dev->si_tty;
193 if ((tp->t_state & TS_ISOPEN) == 0) {
194 ttychars(tp); /* Set up default chars */
195 tp->t_iflag = TTYDEF_IFLAG;
196 tp->t_oflag = TTYDEF_OFLAG;

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342ptcopen(dev, flag, devtype, p)
343 dev_t dev;
344 int flag, devtype;
345 struct proc *p;
346{
347 register struct tty *tp;
348 struct pt_ioctl *pti;
349
197 if (!dev->si_drv1)
198 return(ENXIO);
199 pti = dev->si_drv1;
200 tp = dev->si_tty;
201 if ((tp->t_state & TS_ISOPEN) == 0) {
202 ttychars(tp); /* Set up default chars */
203 tp->t_iflag = TTYDEF_IFLAG;
204 tp->t_oflag = TTYDEF_OFLAG;

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350ptcopen(dev, flag, devtype, p)
351 dev_t dev;
352 int flag, devtype;
353 struct proc *p;
354{
355 register struct tty *tp;
356 struct pt_ioctl *pti;
357
358#ifndef DEVFS
350 if (!dev->si_drv1)
351 ptyinit(minor(dev));
359 if (!dev->si_drv1)
360 ptyinit(minor(dev));
361#endif
352 if (!dev->si_drv1)
353 return(ENXIO);
354 tp = dev->si_tty;
355 if (tp->t_oproc)
356 return (EIO);
357 tp->t_timeout = -1;
358 tp->t_oproc = ptsstart;
359 tp->t_stop = ptsstop;

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811 }
812 }
813 return (error);
814}
815
816
817static void ptc_drvinit __P((void *unused));
818
362 if (!dev->si_drv1)
363 return(ENXIO);
364 tp = dev->si_tty;
365 if (tp->t_oproc)
366 return (EIO);
367 tp->t_timeout = -1;
368 tp->t_oproc = ptsstart;
369 tp->t_stop = ptsstop;

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821 }
822 }
823 return (error);
824}
825
826
827static void ptc_drvinit __P((void *unused));
828
829#ifdef DEVFS
830static void pty_clone __P((void *arg, char *name, int namelen, dev_t *dev));
831
819static void
832static void
833pty_clone(arg, name, namelen, dev)
834 void *arg;
835 char *name;
836 int namelen;
837 dev_t *dev;
838{
839 int u;
840
841 if (*dev != NODEV)
842 return;
843 if (bcmp(name, "pty", 3) != 0)
844 return;
845 if (name[5] != '\0')
846 return;
847 switch (name[3]) {
848 case 'p': u = 0; break;
849 case 'q': u = 32; break;
850 case 'r': u = 64; break;
851 case 's': u = 96; break;
852 case 'P': u = 128; break;
853 case 'Q': u = 160; break;
854 case 'R': u = 192; break;
855 case 'S': u = 224; break;
856 default: return;
857 }
858 if (name[4] >= '0' && name[4] <= '9')
859 u += name[4] - '0';
860 else if (name[4] >= 'a' && name[4] <= 'v')
861 u += name[4] - 'a' + 10;
862 else
863 return;
864 *dev = ptyinit(u);
865 return;
866}
867
868
869#endif
870
871static void
820ptc_drvinit(unused)
821 void *unused;
822{
872ptc_drvinit(unused)
873 void *unused;
874{
875#ifdef DEVFS
876 EVENTHANDLER_REGISTER(devfs_clone, pty_clone, 0, 1000);
877#else
823 cdevsw_add(&pts_cdevsw);
824 cdevsw_add(&ptc_cdevsw);
878 cdevsw_add(&pts_cdevsw);
879 cdevsw_add(&ptc_cdevsw);
825 /* XXX: Gross hack for DEVFS */
826 ptyinit(0);
880 ptyinit(0);
881#endif
827}
828
829SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)
882}
883
884SYSINIT(ptcdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR_C,ptc_drvinit,NULL)