| pty.c (154170) | pty.c (154833) |
|---|---|
| 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 --- 16 unchanged lines hidden (view full) --- 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 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95 30 */ 31 32#include <sys/cdefs.h> | 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 --- 16 unchanged lines hidden (view full) --- 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 * @(#)tty_pty.c 8.4 (Berkeley) 2/20/95 30 */ 31 32#include <sys/cdefs.h> |
| 33__FBSDID("$FreeBSD: head/sys/kern/tty_pty.c 154170 2006-01-10 09:19:10Z phk $"); | 33__FBSDID("$FreeBSD: head/sys/kern/tty_pty.c 154833 2006-01-26 01:30:34Z cognet $"); |
| 34 35/* 36 * Pseudo-teletype Driver 37 * (Actually two drivers, requiring two entries in 'cdevsw') 38 */ 39#include "opt_compat.h" 40#include "opt_tty.h" 41#include <sys/param.h> --- 60 unchanged lines hidden (view full) --- 102 103struct ptsc { 104 int pt_flags; 105 struct selinfo pt_selr, pt_selw; 106 u_char pt_send; 107 u_char pt_ucntl; 108 struct tty *pt_tty; 109 struct cdev *devs, *devc; | 34 35/* 36 * Pseudo-teletype Driver 37 * (Actually two drivers, requiring two entries in 'cdevsw') 38 */ 39#include "opt_compat.h" 40#include "opt_tty.h" 41#include <sys/param.h> --- 60 unchanged lines hidden (view full) --- 102 103struct ptsc { 104 int pt_flags; 105 struct selinfo pt_selr, pt_selw; 106 u_char pt_send; 107 u_char pt_ucntl; 108 struct tty *pt_tty; 109 struct cdev *devs, *devc; |
| 110 int pt_devs_open, pt_devc_open; |
|
| 110 struct prison *pt_prison; 111}; 112 113#define PF_PKT 0x08 /* packet mode */ 114#define PF_STOPPED 0x10 /* user told stopped */ 115#define PF_NOSTOP 0x40 116#define PF_UCNTL 0x80 /* user control mode */ 117 --- 9 unchanged lines hidden (view full) --- 127 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 128 * 129 * XXX: define and add mapping of upper minor bits to allow more 130 * than 256 ptys. 131 */ 132static struct cdev * 133ptyinit(struct cdev *devc, struct thread *td) 134{ | 111 struct prison *pt_prison; 112}; 113 114#define PF_PKT 0x08 /* packet mode */ 115#define PF_STOPPED 0x10 /* user told stopped */ 116#define PF_NOSTOP 0x40 117#define PF_UCNTL 0x80 /* user control mode */ 118 --- 9 unchanged lines hidden (view full) --- 128 * ptc == /dev/pty[pqrsPQRS][0123456789abcdefghijklmnopqrstuv] 129 * 130 * XXX: define and add mapping of upper minor bits to allow more 131 * than 256 ptys. 132 */ 133static struct cdev * 134ptyinit(struct cdev *devc, struct thread *td) 135{ |
| 135 struct cdev *devs; | |
| 136 struct ptsc *pt; 137 int n; 138 139 n = minor(devc); 140 /* For now we only map the lower 8 bits of the minor */ 141 if (n & ~0xff) 142 return (NULL); 143 144 devc->si_flags &= ~SI_CHEAPCLONE; 145 | 136 struct ptsc *pt; 137 int n; 138 139 n = minor(devc); 140 /* For now we only map the lower 8 bits of the minor */ 141 if (n & ~0xff) 142 return (NULL); 143 144 devc->si_flags &= ~SI_CHEAPCLONE; 145 |
| 146 /* 147 * Initially do not create a slave endpoint. 148 */ |
|
| 146 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO); | 149 pt = malloc(sizeof(*pt), M_PTY, M_WAITOK | M_ZERO); |
| 147 pt->devs = devs = make_dev_cred(&pts_cdevsw, n, td->td_ucred, 148 UID_ROOT, GID_WHEEL, 0666, "tty%c%r", names[n / 32], n % 32); | |
| 149 pt->devc = devc; 150 151 pt->pt_tty = ttyalloc(); 152 pt->pt_tty->t_sc = pt; | 150 pt->devc = devc; 151 152 pt->pt_tty = ttyalloc(); 153 pt->pt_tty->t_sc = pt; |
| 153 devs->si_drv1 = devc->si_drv1 = pt; 154 devs->si_tty = devc->si_tty = pt->pt_tty; 155 pt->pt_tty->t_dev = devs; | 154 devc->si_drv1 = pt; 155 devc->si_tty = pt->pt_tty; |
| 156 return (devc); 157} 158 | 156 return (devc); 157} 158 |
| 159static void 160pty_create_slave(struct ucred *cred, struct ptsc *pt, int n) 161{ 162 163 pt->devs = make_dev_cred(&pts_cdevsw, n, cred, UID_ROOT, GID_WHEEL, 164 0666, "tty%c%r", names[n / 32], n % 32); 165 pt->devs->si_drv1 = pt; 166 pt->devs->si_tty = pt->pt_tty; 167 pt->pt_tty->t_dev = pt->devs; 168} 169 170static void 171pty_destroy_slave(struct ptsc *pt) 172{ 173 174 pt->pt_tty->t_dev = NULL; 175 destroy_dev(pt->devs); 176 pt->devs = NULL; 177} 178 179static void 180pty_maybe_destroy_slave(struct ptsc *pt) 181{ 182 183 if (pt->pt_devc_open == 0 && pt->pt_devs_open == 0) 184 pty_destroy_slave(pt); 185} 186 |
|
| 159/*ARGSUSED*/ 160static int 161ptsopen(struct cdev *dev, int flag, int devtype, struct thread *td) 162{ 163 struct tty *tp; 164 int error; 165 struct ptsc *pt; 166 --- 13 unchanged lines hidden (view full) --- 180 if (flag&FNONBLOCK) 181 break; 182 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 183 "ptsopn", 0); 184 if (error) 185 return (error); 186 } 187 error = ttyld_open(tp, dev); | 187/*ARGSUSED*/ 188static int 189ptsopen(struct cdev *dev, int flag, int devtype, struct thread *td) 190{ 191 struct tty *tp; 192 int error; 193 struct ptsc *pt; 194 --- 13 unchanged lines hidden (view full) --- 208 if (flag&FNONBLOCK) 209 break; 210 error = ttysleep(tp, TSA_CARR_ON(tp), TTIPRI | PCATCH, 211 "ptsopn", 0); 212 if (error) 213 return (error); 214 } 215 error = ttyld_open(tp, dev); |
| 188 if (error == 0) | 216 if (error == 0) { |
| 189 ptcwakeup(tp, FREAD|FWRITE); | 217 ptcwakeup(tp, FREAD|FWRITE); |
| 218 pt->pt_devs_open = 1; 219 } else 220 pty_maybe_destroy_slave(pt); |
|
| 190 return (error); 191} 192 193static int 194ptsclose(struct cdev *dev, int flag, int mode, struct thread *td) 195{ | 221 return (error); 222} 223 224static int 225ptsclose(struct cdev *dev, int flag, int mode, struct thread *td) 226{ |
| 227 struct ptsc *pti; |
|
| 196 struct tty *tp; 197 int err; 198 199 tp = dev->si_tty; | 228 struct tty *tp; 229 int err; 230 231 tp = dev->si_tty; |
| 232 pti = dev->si_drv1; 233 234 KASSERT(dev == pti->devs, ("ptsclose: dev != pti->devs")); 235 |
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| 200 err = ttyld_close(tp, flag); 201 (void) tty_close(tp); | 236 err = ttyld_close(tp, flag); 237 (void) tty_close(tp); |
| 238 239 pti->pt_devs_open = 0; 240 pty_maybe_destroy_slave(pti); 241 |
|
| 202 return (err); 203} 204 205static int 206ptsread(struct cdev *dev, struct uio *uio, int flag) 207{ 208 struct tty *tp = dev->si_tty; 209 int error = 0; --- 71 unchanged lines hidden (view full) --- 281 tp->t_stop = ptsstop; 282 (void)ttyld_modem(tp, 1); 283 tp->t_lflag &= ~EXTPROC; 284 pt = dev->si_drv1; 285 pt->pt_prison = td->td_ucred->cr_prison; 286 pt->pt_flags = 0; 287 pt->pt_send = 0; 288 pt->pt_ucntl = 0; | 242 return (err); 243} 244 245static int 246ptsread(struct cdev *dev, struct uio *uio, int flag) 247{ 248 struct tty *tp = dev->si_tty; 249 int error = 0; --- 71 unchanged lines hidden (view full) --- 321 tp->t_stop = ptsstop; 322 (void)ttyld_modem(tp, 1); 323 tp->t_lflag &= ~EXTPROC; 324 pt = dev->si_drv1; 325 pt->pt_prison = td->td_ucred->cr_prison; 326 pt->pt_flags = 0; 327 pt->pt_send = 0; 328 pt->pt_ucntl = 0; |
| 329 330 pty_create_slave(td->td_ucred, pt, minor(dev)); 331 pt->pt_devc_open = 1; 332 |
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| 289 return (0); 290} 291 292static int 293ptcclose(struct cdev *dev, int flags, int fmt, struct thread *td) 294{ | 333 return (0); 334} 335 336static int 337ptcclose(struct cdev *dev, int flags, int fmt, struct thread *td) 338{ |
| 339 struct ptsc *pti = dev->si_drv1; |
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| 295 struct tty *tp; 296 297 tp = dev->si_tty; 298 (void)ttyld_modem(tp, 0); 299 300 /* 301 * XXX MDMBUF makes no sense for ptys but would inhibit the above 302 * l_modem(). CLOCAL makes sense but isn't supported. Special --- 4 unchanged lines hidden (view full) --- 307 */ 308 if (tp->t_state & TS_ISOPEN) { 309 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 310 tp->t_state |= TS_ZOMBIE; 311 ttyflush(tp, FREAD | FWRITE); 312 } 313 314 tp->t_oproc = 0; /* mark closed */ | 340 struct tty *tp; 341 342 tp = dev->si_tty; 343 (void)ttyld_modem(tp, 0); 344 345 /* 346 * XXX MDMBUF makes no sense for ptys but would inhibit the above 347 * l_modem(). CLOCAL makes sense but isn't supported. Special --- 4 unchanged lines hidden (view full) --- 352 */ 353 if (tp->t_state & TS_ISOPEN) { 354 tp->t_state &= ~(TS_CARR_ON | TS_CONNECTED); 355 tp->t_state |= TS_ZOMBIE; 356 ttyflush(tp, FREAD | FWRITE); 357 } 358 359 tp->t_oproc = 0; /* mark closed */ |
| 360 pti->pt_devc_open = 0; 361 pty_maybe_destroy_slave(pti); |
|
| 315 return (0); 316} 317 318static int 319ptcread(struct cdev *dev, struct uio *uio, int flag) 320{ 321 struct tty *tp = dev->si_tty; 322 struct ptsc *pt = dev->si_drv1; --- 398 unchanged lines hidden --- | 362 return (0); 363} 364 365static int 366ptcread(struct cdev *dev, struct uio *uio, int flag) 367{ 368 struct tty *tp = dev->si_tty; 369 struct ptsc *pt = dev->si_drv1; --- 398 unchanged lines hidden --- |