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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.7 by pcg, Mon Mar 1 01:06:46 2004 UTC vs.
Revision 1.22 by root, Tue Jan 11 04:44:57 2005 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * 4 *
5 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> 6 * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com>
7 * Copyright (c) 2004 Marc Lehmann <pcg@goof.com>
7 * 8 *
8 * This program is free software; you can redistribute it and/or modify 9 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by 10 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or 11 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version. 12 * (at your option) any later version.
… …
19 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
22 23
23#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h"
24 26
25/*
26 * Try to be self-contained except for the above autoconfig'd defines
27 */
28
29#if 0
30#ifdef HAVE_GETPT
31# define _GNU_SOURCE
32#endif
33#endif
34
35#include <stdio.h>
36#ifdef HAVE_STDLIB_H 27#ifdef HAVE_STDLIB_H
37# include <stdlib.h> 28# include <cstdlib>
38#endif 29#endif
39#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
40# include <sys/types.h> 31# include <sys/types.h>
41#endif 32#endif
42#ifdef HAVE_UNISTD_H 33#ifdef HAVE_UNISTD_H
43# include <unistd.h> 34# include <unistd.h>
44#endif 35#endif
45#if defined(HAVE_STRING_H) 36#if defined(HAVE_STRING_H)
46# include <string.h> 37# include <cstring>
47#endif 38#endif
48#ifdef HAVE_FCNTL_H 39#ifdef HAVE_FCNTL_H
49# include <fcntl.h> 40# include <fcntl.h>
50#endif 41#endif
51#ifdef HAVE_SYS_IOCTL_H 42#ifdef HAVE_SYS_IOCTL_H
52# include <sys/ioctl.h> 43# include <sys/ioctl.h>
53#endif 44#endif
54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 45#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
55# include <sys/stropts.h> /* for I_PUSH */ 46# include <sys/stropts.h> /* for I_PUSH */
56#endif 47#endif
57 48#ifdef HAVE_ISASTREAM
58#ifdef DEBUG_TTY 49# include <stropts.h>
59# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
60#else
61# define D_TTY(x)
62#endif 50#endif
51#ifdef HAVE_PTY_H
52# include <pty.h>
53#endif
54
55// better do this via configure, but....
56#if defined(__FreeBSD__)
57# include <libutil.h>
58#elif defined(__DARWIN__) || (defined (__MACH__) && defined (__APPLE__))
59# include <util.h>
60#endif
61
62#include <cstdio>
63#include <grp.h>
63 64
64/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
65 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
66 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
67/* 68/*
68 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
69 * If successful, ttydev is set to the name of the slave device. 70 * If successful, ttydev is set to the name of the slave device.
70 * fd_tty _may_ also be set to an open fd to the slave device 71 * fd_tty _may_ also be set to an open fd to the slave device
71 */ 72 */
72/* EXTPROTO */ 73static int
73int
74rxvt_get_pty (int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
75{ 75{
76 int pfd; 76 int pfd;
77 77
78#ifdef PTYS_ARE_OPENPTY 78#ifdef PTYS_ARE_OPENPTY
79
80 char tty_name[sizeof "/dev/pts/????\0"]; 79 char tty_name[sizeof "/dev/pts/????\0"];
81 80
82 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 81 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1)
83 { 82 {
84 *ttydev = strdup (tty_name); 83 *ttydev = strdup (tty_name);
… …
109 108
110 { 109 {
111# ifdef PTYS_ARE_GETPT 110# ifdef PTYS_ARE_GETPT
112 pfd = getpt (); 111 pfd = getpt ();
113# else 112# else
114
115 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 113 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
116# endif 114# endif
117 115
118 if (pfd >= 0) 116 if (pfd >= 0)
119 { 117 {
120 if (grantpt (pfd) == 0 /* change slave permissions */ 118 if (grantpt (pfd) == 0 /* change slave permissions */
121 && unlockpt (pfd) == 0) 119 && unlockpt (pfd) == 0)
122 { /* slave now unlocked */ 120 { /* slave now unlocked */
123 *ttydev = ptsname (pfd); /* get slave's name */ 121 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
124 return pfd; 122 return pfd;
125 } 123 }
126 close (pfd); 124 close (pfd);
127 } 125 }
128 } 126 }
… …
130#endif 128#endif
131 129
132#ifdef PTYS_ARE_PTC 130#ifdef PTYS_ARE_PTC
133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 131 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 132 {
135 *ttydev = ttyname (pfd); 133 *ttydev = strdup (ttyname (pfd));
136 return pfd; 134 return pfd;
137 } 135 }
138#endif 136#endif
139 137
140#ifdef PTYS_ARE_CLONE 138#ifdef PTYS_ARE_CLONE
141 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 139 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
142 { 140 {
143 *ttydev = ptsname (pfd); 141 *ttydev = strdup (ptsname (pfd));
144 return pfd; 142 return pfd;
145 } 143 }
146#endif 144#endif
147 145
148#ifdef PTYS_ARE_NUMERIC 146#ifdef PTYS_ARE_NUMERIC
149 { 147 {
150 int idx; 148 int idx;
151 char *c1, *c2; 149 char *c1, *c2;
152 char pty_name[] = "/dev/ptyp???"; 150 char pty_name[] = "/dev/ptyp???";
153 char tty_name[] = "/dev/ttyp???"; 151 char tty_name[] = "/dev/ttyp???";
154 152
155 c1 = & (pty_name[sizeof (pty_name) - 4]); 153 c1 = &(pty_name[sizeof (pty_name) - 4]);
156 c2 = & (tty_name[sizeof (tty_name) - 4]); 154 c2 = &(tty_name[sizeof (tty_name) - 4]);
157 for (idx = 0; idx < 256; idx++) 155 for (idx = 0; idx < 256; idx++)
158 { 156 {
159 sprintf (c1, "%d", idx); 157 sprintf (c1, "%d", idx);
160 sprintf (c2, "%d", idx); 158 sprintf (c2, "%d", idx);
161 if (access (tty_name, F_OK) < 0) 159 if (access (tty_name, F_OK) < 0)
162 { 160 {
163 idx = 256; 161 idx = 256;
164 break; 162 break;
165 } 163 }
164
166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 165 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
167 { 166 {
168 if (access (tty_name, R_OK | W_OK) == 0) 167 if (access (tty_name, R_OK | W_OK) == 0)
169 { 168 {
170 *ttydev = strdup (tty_name); 169 *ttydev = strdup (tty_name);
171 return pfd; 170 return pfd;
172 } 171 }
172
173 close (pfd); 173 close (pfd);
174 } 174 }
175 } 175 }
176 } 176 }
177#endif 177#endif
178
178#ifdef PTYS_ARE_SEARCHED 179#ifdef PTYS_ARE_SEARCHED
179 { 180 {
180 const char *c1, *c2; 181 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??"; 182 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??"; 183 char tty_name[] = "/dev/tty??";
183 184
184# ifndef PTYCHAR1 185# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz" 186# define PTYCHAR1 "pqrstuvwxyz"
186# endif 187# endif
187# ifndef PTYCHAR2 188# ifndef PTYCHAR2
… …
201 if (access (tty_name, R_OK | W_OK) == 0) 202 if (access (tty_name, R_OK | W_OK) == 0)
202 { 203 {
203 *ttydev = strdup (tty_name); 204 *ttydev = strdup (tty_name);
204 return pfd; 205 return pfd;
205 } 206 }
207
206 close (pfd); 208 close (pfd);
207 } 209 }
208 } 210 }
209 } 211 }
210 } 212 }
211#endif 213#endif
214
212 return -1; 215 return -1;
213} 216}
214 217
215/*----------------------------------------------------------------------*/ 218/*----------------------------------------------------------------------*/
216/* 219/*
217 * Returns tty file descriptor, or -1 on failure 220 * Returns tty file descriptor, or -1 on failure
218 */ 221 */
219/* EXTPROTO */ 222static int
220int
221rxvt_get_tty (const char *ttydev) 223get_tty (char *ttydev)
222{ 224{
223 return open (ttydev, O_RDWR | O_NOCTTY, 0); 225 return open (ttydev, O_RDWR | O_NOCTTY, 0);
224} 226}
225 227
226/*----------------------------------------------------------------------*/ 228/*----------------------------------------------------------------------*/
227/* 229/*
228 * Make our tty a controlling tty so that /dev/tty points to us 230 * Make our tty a controlling tty so that /dev/tty points to us
229 */ 231 */
230/* EXTPROTO */ 232static int
231int
232rxvt_control_tty (int fd_tty, const char *ttydev) 233control_tty (int fd_tty, const char *ttydev)
233{ 234{
234#ifndef __QNX__ 235#ifndef __QNX__
235 int fd; 236 int fd;
236 237
237 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
238 /* ---------------------------------------- */ 238 /* ---------------------------------------- */
239# ifdef HAVE_SETSID 239# ifdef HAVE_SETSID
240 setsid (); 240 setsid ();
241# endif 241# endif
242# if defined(HAVE_SETPGID) 242# if defined(HAVE_SETPGID)
243 setpgid (0, 0); 243 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP) 244# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0); 245 setpgrp (0, 0);
246# endif 246# endif
247
247 /* ---------------------------------------- */ 248 /* ---------------------------------------- */
248# ifdef TIOCNOTTY 249# ifdef TIOCNOTTY
249
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
251 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
252 if (fd >= 0) 251 if (fd >= 0)
253 { 252 {
254 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 253 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
255 close (fd); 254 close (fd);
256 } 255 }
257# endif 256# endif
257
258 /* ---------------------------------------- */ 258 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
260 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
261 if (fd >= 0) 260 if (fd >= 0)
262 close (fd); /* ouch: still have controlling tty */ 261 close (fd); /* ouch: still have controlling tty */
262
263 /* ---------------------------------------- */ 263 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
265 /* 265 /*
266 * Push STREAMS modules: 266 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 267 * ptem: pseudo-terminal hardware emulation module.
… …
281 */ 281 */
282# ifdef HAVE_ISASTREAM 282# ifdef HAVE_ISASTREAM
283 if (isastream (fd_tty) == 1) 283 if (isastream (fd_tty) == 1)
284# endif 284# endif
285 { 285 {
286 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
287 ioctl (fd_tty, I_PUSH, "ptem"); 286 ioctl (fd_tty, I_PUSH, "ptem");
288 ioctl (fd_tty, I_PUSH, "ldterm"); 287 ioctl (fd_tty, I_PUSH, "ldterm");
289 ioctl (fd_tty, I_PUSH, "ttcompat"); 288 ioctl (fd_tty, I_PUSH, "ttcompat");
290 } 289 }
291#endif 290#endif
292 /* ---------------------------------------- */ 291 /* ---------------------------------------- */
293# if defined(TIOCSCTTY) 292# if defined(TIOCSCTTY)
294 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 293 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
295 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
296# elif defined(TIOCSETCTTY) 294# elif defined(TIOCSETCTTY)
297 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 295 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
299# else 296# else
300 fd = open (ttydev, O_RDWR); 297 fd = open (ttydev, O_RDWR);
301 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
302 if (fd >= 0) 298 if (fd >= 0)
303 close (fd); 299 close (fd);
304# endif 300# endif
305 /* ---------------------------------------- */ 301 /* ---------------------------------------- */
306 fd = open ("/dev/tty", O_WRONLY); 302 fd = open ("/dev/tty", O_WRONLY);
307 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
308 if (fd < 0) 303 if (fd < 0)
309 return -1; /* fatal */ 304 return -1; /* fatal */
310 close (fd); 305 close (fd);
311 /* ---------------------------------------- */ 306 /* ---------------------------------------- */
312 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
313 /* ---------------------------------------- */
314#endif /* ! __QNX__ */ 307#endif /* ! __QNX__ */
315 308
316 return 0; 309 return 0;
317} 310}
311
312#ifndef NO_SETOWNER_TTYDEV
313static struct ttyconf {
314 gid_t gid;
315 mode_t mode;
316
317 ttyconf ()
318 {
319#ifdef TTY_GID_SUPPORT
320 struct group *gr = getgrnam ("tty");
321
322 if (gr)
323 { /* change group ownership of tty to "tty" */
324 mode = S_IRUSR | S_IWUSR | S_IWGRP;
325 gid = gr->gr_gid;
326 }
327 else
328#endif /* TTY_GID_SUPPORT */
329 {
330 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
331 gid = getgid ();
332 }
333 }
334} ttyconf;
335
336void
337rxvt_ptytty::privileges (rxvt_privaction action)
338{
339 rxvt_privileges (RESTORE);
340
341 if (action == SAVE)
342 {
343 //next_tty_action = RESTORE;
344# ifndef RESET_TTY_TO_COMMON_DEFAULTS
345 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
346 if (lstat (name, &savestat) < 0) /* you lose out */
347 ;//next_tty_action = IGNORE;
348 else
349# endif
350
351 {
352 chown (name, getuid (), ttyconf.gid); /* fail silently */
353 chmod (name, ttyconf.mode);
354# ifdef HAVE_REVOKE
355 revoke (name);
356# endif
357
358 }
359 }
360 else
361 { /* action == RESTORE */
362 //next_tty_action = IGNORE;
363# ifndef RESET_TTY_TO_COMMON_DEFAULTS
364 chmod (name, savestat.st_mode);
365 chown (name, savestat.st_uid, savestat.st_gid);
366# else
367 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
368 chown (name, 0, 0);
369# endif
370
371 }
372
373 rxvt_privileges (IGNORE);
374}
375#endif
376
377rxvt_ptytty::rxvt_ptytty ()
378{
379 pty = tty = -1;
380 name = 0;
381}
382
383rxvt_ptytty::~rxvt_ptytty ()
384{
385 put ();
386}
387
388void
389
390rxvt_ptytty::close_tty ()
391{
392 if (tty >= 0) close (tty);
393 tty = -1;
394}
395
396void
397rxvt_ptytty::put ()
398{
399#ifndef NO_SETOWNER_TTYDEV
400 if (tty >= 0)
401 privileges (RESTORE);
402#endif
403
404 if (pty >= 0) close (pty);
405 close_tty ();
406 free (name);
407
408 pty = tty = -1;
409 name = 0;
410}
411
412bool
413rxvt_ptytty::make_controlling_tty ()
414{
415 return control_tty (tty, name) >= 0;
416}
417
418bool
419rxvt_ptytty::get ()
420{
421 /* get master (pty) */
422 if ((pty = get_pty (&tty, &name)) < 0)
423 return false;
424
425 fcntl (pty, F_SETFL, O_NONBLOCK);
426
427 /* get slave (tty) */
428 if (tty < 0)
429 {
430#ifndef NO_SETOWNER_TTYDEV
431 privileges (SAVE);
432#endif
433
434 if ((tty = get_tty (name)) < 0)
435 {
436 put ();
437 return false;
438 }
439 }
440
441 return true;
442}
443
444void
445rxvt_ptytty::set_utf8_mode (bool on)
446{
447#ifdef IUTF8
448 if (pty != -1)
449 {
450 struct termios tio;
451
452 if (tcgetattr (pty, &tio) != -1)
453 {
454 tcflag_t new_cflag = tio.c_iflag;
455
456 if (on)
457 new_cflag |= IUTF8;
458 else
459 new_cflag &= ~IUTF8;
460
461 if (new_cflag != tio.c_iflag)
462 {
463 tio.c_iflag = new_cflag;
464 tcsetattr (pty, TCSANOW, &tio);
465 }
466 }
467 }
468#endif
469}
470
318/*----------------------- end-of-file (C source) -----------------------*/ 471/*----------------------- end-of-file (C source) -----------------------*/
472

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