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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.10 by pcg, Fri Apr 2 20:41:01 2004 UTC vs.
Revision 1.32 by root, Wed Jan 11 20:46:46 2006 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) 2004-2006 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 <cstdio>
36#ifdef HAVE_STDLIB_H
37# include <cstdlib> 27# include <cstdlib>
38#endif 28# include <cstring>
29
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)
46# include <cstring>
47#endif
48#ifdef HAVE_FCNTL_H 36#ifdef HAVE_FCNTL_H
49# include <fcntl.h> 37# include <fcntl.h>
50#endif 38#endif
51#ifdef HAVE_SYS_IOCTL_H 39#ifdef HAVE_SYS_IOCTL_H
52# include <sys/ioctl.h> 40# include <sys/ioctl.h>
53#endif 41#endif
54#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
55# include <sys/stropts.h> /* for I_PUSH */ 43# include <sys/stropts.h> /* for I_PUSH */
56#endif 44#endif
57#ifdef HAVE_ISASTREAM 45#ifdef HAVE_ISASTREAM
58# include <stropts.h> 46# include <stropts.h>
59#endif 47#endif
60 48#if defined(HAVE_PTY_H)
61#ifdef DEBUG_TTY 49# include <pty.h>
62# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) 50#elif defined(HAVE_LIBUTIL_H)
63#else 51# include <libutil.h>
64# define D_TTY(x) 52#elif defined(HAVE_UTIL_H)
53# include <util.h>
65#endif 54#endif
55
56#include <cstdio>
57#include <grp.h>
66 58
67/* ------------------------------------------------------------------------- * 59/* ------------------------------------------------------------------------- *
68 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 60 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
69 * ------------------------------------------------------------------------- */ 61 * ------------------------------------------------------------------------- */
70/* 62/*
71 * Returns pty file descriptor, or -1 on failure 63 * Returns pty file descriptor, or -1 on failure
72 * If successful, ttydev is set to the name of the slave device. 64 * If successful, ttydev is set to the name of the slave device.
73 * fd_tty _may_ also be set to an open fd to the slave device 65 * fd_tty _may_ also be set to an open fd to the slave device
74 */ 66 */
75/* EXTPROTO */ 67static int
76int
77rxvt_get_pty (int *fd_tty, const char **ttydev) 68get_pty (int *fd_tty, char **ttydev)
78{ 69{
79 int pfd; 70 int pfd;
80 71
81#ifdef PTYS_ARE_OPENPTY 72#ifdef PTYS_ARE_OPENPTY
82
83 char tty_name[sizeof "/dev/pts/????\0"]; 73 char tty_name[sizeof "/dev/pts/????\0"];
84 74
75 rxvt_privileges(RESTORE);
85 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 76 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
77 rxvt_privileges(IGNORE);
78
79 if (res != -1)
86 { 80 {
87 *ttydev = strdup (tty_name); 81 *ttydev = strdup (tty_name);
88 return pfd; 82 return pfd;
89 } 83 }
90#endif 84#endif
… …
93 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 87 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
94 if (*ttydev != NULL) 88 if (*ttydev != NULL)
95 return pfd; 89 return pfd;
96#endif 90#endif
97 91
98#ifdef PTYS_ARE_GETPTY
99
100 char *ptydev;
101
102 while ((ptydev = getpty ()) != NULL)
103 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
104 {
105 *ttydev = ptydev;
106 return pfd;
107 }
108#endif
109
110#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 92#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
111# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 93# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX)
112 94
113 { 95 {
114# ifdef PTYS_ARE_GETPT 96# ifdef PTYS_ARE_GETPT
115 pfd = getpt (); 97 pfd = getpt ();
116# else 98# else
117
118 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 99 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
119# endif 100# endif
120 101
121 if (pfd >= 0) 102 if (pfd >= 0)
122 { 103 {
123 if (grantpt (pfd) == 0 /* change slave permissions */ 104 if (grantpt (pfd) == 0 /* change slave permissions */
124 && unlockpt (pfd) == 0) 105 && unlockpt (pfd) == 0)
125 { /* slave now unlocked */ 106 { /* slave now unlocked */
126 *ttydev = ptsname (pfd); /* get slave's name */ 107 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
127 return pfd; 108 return pfd;
128 } 109 }
129 close (pfd); 110 close (pfd);
130 } 111 }
131 } 112 }
… …
133#endif 114#endif
134 115
135#ifdef PTYS_ARE_PTC 116#ifdef PTYS_ARE_PTC
136 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 117 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 118 {
138 *ttydev = ttyname (pfd); 119 *ttydev = strdup (ttyname (pfd));
139 return pfd; 120 return pfd;
140 } 121 }
141#endif 122#endif
142 123
143#ifdef PTYS_ARE_CLONE 124#ifdef PTYS_ARE_CLONE
144 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 125 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
145 { 126 {
146 *ttydev = ptsname (pfd); 127 *ttydev = strdup (ptsname (pfd));
147 return pfd; 128 return pfd;
148 } 129 }
149#endif 130#endif
150 131
151#ifdef PTYS_ARE_NUMERIC 132#ifdef PTYS_ARE_NUMERIC
152 { 133 {
153 int idx; 134 int idx;
154 char *c1, *c2; 135 char *c1, *c2;
155 char pty_name[] = "/dev/ptyp???"; 136 char pty_name[] = "/dev/ptyp???";
156 char tty_name[] = "/dev/ttyp???"; 137 char tty_name[] = "/dev/ttyp???";
157 138
158 c1 = & (pty_name[sizeof (pty_name) - 4]); 139 c1 = &(pty_name[sizeof (pty_name) - 4]);
159 c2 = & (tty_name[sizeof (tty_name) - 4]); 140 c2 = &(tty_name[sizeof (tty_name) - 4]);
160 for (idx = 0; idx < 256; idx++) 141 for (idx = 0; idx < 256; idx++)
161 { 142 {
162 sprintf (c1, "%d", idx); 143 sprintf (c1, "%d", idx);
163 sprintf (c2, "%d", idx); 144 sprintf (c2, "%d", idx);
164 if (access (tty_name, F_OK) < 0) 145 if (access (tty_name, F_OK) < 0)
165 { 146 {
166 idx = 256; 147 idx = 256;
167 break; 148 break;
168 } 149 }
150
169 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 151 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
170 { 152 {
171 if (access (tty_name, R_OK | W_OK) == 0) 153 if (access (tty_name, R_OK | W_OK) == 0)
172 { 154 {
173 *ttydev = strdup (tty_name); 155 *ttydev = strdup (tty_name);
174 return pfd; 156 return pfd;
175 } 157 }
158
176 close (pfd); 159 close (pfd);
177 } 160 }
178 } 161 }
179 } 162 }
180#endif 163#endif
164
181#ifdef PTYS_ARE_SEARCHED 165#ifdef PTYS_ARE_SEARCHED
182 { 166 {
183 const char *c1, *c2; 167 const char *c1, *c2;
184 char pty_name[] = "/dev/pty??"; 168 char pty_name[] = "/dev/pty??";
185 char tty_name[] = "/dev/tty??"; 169 char tty_name[] = "/dev/tty??";
186 170
187# ifndef PTYCHAR1 171# ifndef PTYCHAR1
188# define PTYCHAR1 "pqrstuvwxyz" 172# define PTYCHAR1 "pqrstuvwxyz"
189# endif 173# endif
190# ifndef PTYCHAR2 174# ifndef PTYCHAR2
… …
204 if (access (tty_name, R_OK | W_OK) == 0) 188 if (access (tty_name, R_OK | W_OK) == 0)
205 { 189 {
206 *ttydev = strdup (tty_name); 190 *ttydev = strdup (tty_name);
207 return pfd; 191 return pfd;
208 } 192 }
193
209 close (pfd); 194 close (pfd);
210 } 195 }
211 } 196 }
212 } 197 }
213 } 198 }
214#endif 199#endif
200
215 return -1; 201 return -1;
216} 202}
217 203
218/*----------------------------------------------------------------------*/ 204/*----------------------------------------------------------------------*/
219/* 205/*
220 * Returns tty file descriptor, or -1 on failure 206 * Returns tty file descriptor, or -1 on failure
221 */ 207 */
222/* EXTPROTO */ 208static int
223int
224rxvt_get_tty (const char *ttydev) 209get_tty (char *ttydev)
225{ 210{
226 return open (ttydev, O_RDWR | O_NOCTTY, 0); 211 return open (ttydev, O_RDWR | O_NOCTTY, 0);
227} 212}
228 213
229/*----------------------------------------------------------------------*/ 214/*----------------------------------------------------------------------*/
230/* 215/*
231 * Make our tty a controlling tty so that /dev/tty points to us 216 * Make our tty a controlling tty so that /dev/tty points to us
232 */ 217 */
233/* EXTPROTO */ 218static int
234int
235rxvt_control_tty (int fd_tty, const char *ttydev) 219control_tty (int fd_tty, const char *ttydev)
236{ 220{
237#ifndef __QNX__ 221#ifndef __QNX__
238 int fd; 222 int fd;
239 223
240 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
241 /* ---------------------------------------- */ 224 /* ---------------------------------------- */
242# ifdef HAVE_SETSID 225# ifdef HAVE_SETSID
243 setsid (); 226 setsid ();
244# endif 227# endif
245# if defined(HAVE_SETPGID) 228# if defined(HAVE_SETPGID)
246 setpgid (0, 0); 229 setpgid (0, 0);
247# elif defined(HAVE_SETPGRP) 230# elif defined(HAVE_SETPGRP)
248 setpgrp (0, 0); 231 setpgrp (0, 0);
249# endif 232# endif
233
250 /* ---------------------------------------- */ 234 /* ---------------------------------------- */
251# ifdef TIOCNOTTY 235# ifdef TIOCNOTTY
252
253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 236 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
254 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
255 if (fd >= 0) 237 if (fd >= 0)
256 { 238 {
257 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 239 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
258 close (fd); 240 close (fd);
259 } 241 }
260# endif 242# endif
243
261 /* ---------------------------------------- */ 244 /* ---------------------------------------- */
262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
263 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
264 if (fd >= 0) 246 if (fd >= 0)
265 close (fd); /* ouch: still have controlling tty */ 247 close (fd); /* ouch: still have controlling tty */
248
266 /* ---------------------------------------- */ 249 /* ---------------------------------------- */
267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 250#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
268 /* 251 /*
269 * Push STREAMS modules: 252 * Push STREAMS modules:
270 * ptem: pseudo-terminal hardware emulation module. 253 * ptem: pseudo-terminal hardware emulation module.
… …
284 */ 267 */
285# ifdef HAVE_ISASTREAM 268# ifdef HAVE_ISASTREAM
286 if (isastream (fd_tty) == 1) 269 if (isastream (fd_tty) == 1)
287# endif 270# endif
288 { 271 {
289 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
290 ioctl (fd_tty, I_PUSH, "ptem"); 272 ioctl (fd_tty, I_PUSH, "ptem");
291 ioctl (fd_tty, I_PUSH, "ldterm"); 273 ioctl (fd_tty, I_PUSH, "ldterm");
292 ioctl (fd_tty, I_PUSH, "ttcompat"); 274 ioctl (fd_tty, I_PUSH, "ttcompat");
293 } 275 }
294#endif 276#endif
295 /* ---------------------------------------- */ 277 /* ---------------------------------------- */
296# if defined(TIOCSCTTY) 278# if defined(TIOCSCTTY)
297 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 279 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
299# elif defined(TIOCSETCTTY) 280# elif defined(TIOCSETCTTY)
300 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 281 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
301 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
302# else 282# else
303 fd = open (ttydev, O_RDWR); 283 fd = open (ttydev, O_RDWR);
304 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
305 if (fd >= 0) 284 if (fd >= 0)
306 close (fd); 285 close (fd);
307# endif 286# endif
308 /* ---------------------------------------- */ 287 /* ---------------------------------------- */
309 fd = open ("/dev/tty", O_WRONLY); 288 fd = open ("/dev/tty", O_WRONLY);
310 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
311 if (fd < 0) 289 if (fd < 0)
312 return -1; /* fatal */ 290 return -1; /* fatal */
313 close (fd); 291 close (fd);
314 /* ---------------------------------------- */ 292 /* ---------------------------------------- */
315 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
316 /* ---------------------------------------- */
317#endif /* ! __QNX__ */ 293#endif /* ! __QNX__ */
318 294
319 return 0; 295 return 0;
320} 296}
297
298#ifndef NO_SETOWNER_TTYDEV
299static struct ttyconf {
300 gid_t gid;
301 mode_t mode;
302
303 ttyconf ()
304 {
305#ifdef TTY_GID_SUPPORT
306 struct group *gr = getgrnam ("tty");
307
308 if (gr)
309 { /* change group ownership of tty to "tty" */
310 mode = S_IRUSR | S_IWUSR | S_IWGRP;
311 gid = gr->gr_gid;
312 }
313 else
314#endif /* TTY_GID_SUPPORT */
315 {
316 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
317 gid = getgid ();
318 }
319 }
320} ttyconf;
321
322void
323rxvt_ptytty::privileges (rxvt_privaction action)
324{
325 if (!name || !*name)
326 return;
327
328 rxvt_privileges (RESTORE);
329
330 if (action == SAVE)
331 {
332# ifndef RESET_TTY_TO_COMMON_DEFAULTS
333 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
334 if (lstat (name, &savestat) < 0) /* you lose out */
335 ;
336 else
337# endif
338 {
339 saved = true;
340 chown (name, getuid (), ttyconf.gid); /* fail silently */
341 chmod (name, ttyconf.mode);
342# ifdef HAVE_REVOKE
343 revoke (name);
344# endif
345 }
346 }
347 else
348 { /* action == RESTORE */
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 if (saved)
351 {
352 chmod (name, savestat.st_mode);
353 chown (name, savestat.st_uid, savestat.st_gid);
354 }
355# else
356 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
357 chown (name, 0, 0);
358# endif
359
360 }
361
362 rxvt_privileges (IGNORE);
363}
364#endif
365
366rxvt_ptytty::rxvt_ptytty ()
367{
368 pty = tty = -1;
369 name = 0;
370#ifndef NO_SETOWNER_TTYDEV
371 saved = false;
372#endif
373}
374
375rxvt_ptytty::~rxvt_ptytty ()
376{
377 put ();
378}
379
380void
381
382rxvt_ptytty::close_tty ()
383{
384 if (tty < 0)
385 return;
386
387 close (tty);
388 tty = -1;
389}
390
391void
392rxvt_ptytty::put ()
393{
394#ifndef NO_SETOWNER_TTYDEV
395 privileges (RESTORE);
396#endif
397
398 if (pty >= 0) close (pty);
399 close_tty ();
400 free (name);
401
402 pty = tty = -1;
403 name = 0;
404}
405
406bool
407rxvt_ptytty::make_controlling_tty ()
408{
409 return control_tty (tty, name) >= 0;
410}
411
412bool
413rxvt_ptytty::get ()
414{
415 /* get master (pty) */
416 if ((pty = get_pty (&tty, &name)) < 0)
417 return false;
418
419 fcntl (pty, F_SETFL, O_NONBLOCK);
420
421 /* get slave (tty) */
422 if (tty < 0)
423 {
424#ifndef NO_SETOWNER_TTYDEV
425 privileges (SAVE);
426#endif
427
428 if ((tty = get_tty (name)) < 0)
429 {
430 put ();
431 return false;
432 }
433 }
434
435 return true;
436}
437
438void
439rxvt_ptytty::set_utf8_mode (bool on)
440{
441#ifdef IUTF8
442 if (pty < 0)
443 return;
444
445 struct termios tio;
446
447 if (tcgetattr (pty, &tio) != -1)
448 {
449 tcflag_t new_cflag = tio.c_iflag;
450
451 if (on)
452 new_cflag |= IUTF8;
453 else
454 new_cflag &= ~IUTF8;
455
456 if (new_cflag != tio.c_iflag)
457 {
458 tio.c_iflag = new_cflag;
459 tcsetattr (pty, TCSANOW, &tio);
460 }
461 }
462#endif
463}
464
321/*----------------------- end-of-file (C source) -----------------------*/ 465/*----------------------- end-of-file (C source) -----------------------*/
466

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