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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.8 by pcg, Sat Mar 6 00:05:01 2004 UTC vs.
Revision 1.27 by root, Tue Jan 3 16:32:33 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 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 27#ifdef HAVE_STDLIB_H
37# include <cstdlib> 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>
… …
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
81 rxvt_privileges(RESTORE);
82 if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) 82 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
83 rxvt_privileges(IGNORE);
84
85 if (res != -1)
83 { 86 {
84 *ttydev = strdup (tty_name); 87 *ttydev = strdup (tty_name);
85 return pfd; 88 return pfd;
86 } 89 }
87#endif 90#endif
… …
91 if (*ttydev != NULL) 94 if (*ttydev != NULL)
92 return pfd; 95 return pfd;
93#endif 96#endif
94 97
95#ifdef PTYS_ARE_GETPTY 98#ifdef PTYS_ARE_GETPTY
96
97 char *ptydev; 99 char *ptydev;
98 100
99 while ((ptydev = getpty ()) != NULL) 101 while ((ptydev = getpty ()) != NULL)
100 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) 102 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
101 { 103 {
… …
109 111
110 { 112 {
111# ifdef PTYS_ARE_GETPT 113# ifdef PTYS_ARE_GETPT
112 pfd = getpt (); 114 pfd = getpt ();
113# else 115# else
114
115 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 116 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
116# endif 117# endif
117 118
118 if (pfd >= 0) 119 if (pfd >= 0)
119 { 120 {
120 if (grantpt (pfd) == 0 /* change slave permissions */ 121 if (grantpt (pfd) == 0 /* change slave permissions */
121 && unlockpt (pfd) == 0) 122 && unlockpt (pfd) == 0)
122 { /* slave now unlocked */ 123 { /* slave now unlocked */
123 *ttydev = ptsname (pfd); /* get slave's name */ 124 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
124 return pfd; 125 return pfd;
125 } 126 }
126 close (pfd); 127 close (pfd);
127 } 128 }
128 } 129 }
… …
130#endif 131#endif
131 132
132#ifdef PTYS_ARE_PTC 133#ifdef PTYS_ARE_PTC
133 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
134 { 135 {
135 *ttydev = ttyname (pfd); 136 *ttydev = strdup (ttyname (pfd));
136 return pfd; 137 return pfd;
137 } 138 }
138#endif 139#endif
139 140
140#ifdef PTYS_ARE_CLONE 141#ifdef PTYS_ARE_CLONE
141 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 142 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
142 { 143 {
143 *ttydev = ptsname (pfd); 144 *ttydev = strdup (ptsname (pfd));
144 return pfd; 145 return pfd;
145 } 146 }
146#endif 147#endif
147 148
148#ifdef PTYS_ARE_NUMERIC 149#ifdef PTYS_ARE_NUMERIC
149 { 150 {
150 int idx; 151 int idx;
151 char *c1, *c2; 152 char *c1, *c2;
152 char pty_name[] = "/dev/ptyp???"; 153 char pty_name[] = "/dev/ptyp???";
153 char tty_name[] = "/dev/ttyp???"; 154 char tty_name[] = "/dev/ttyp???";
154 155
155 c1 = & (pty_name[sizeof (pty_name) - 4]); 156 c1 = &(pty_name[sizeof (pty_name) - 4]);
156 c2 = & (tty_name[sizeof (tty_name) - 4]); 157 c2 = &(tty_name[sizeof (tty_name) - 4]);
157 for (idx = 0; idx < 256; idx++) 158 for (idx = 0; idx < 256; idx++)
158 { 159 {
159 sprintf (c1, "%d", idx); 160 sprintf (c1, "%d", idx);
160 sprintf (c2, "%d", idx); 161 sprintf (c2, "%d", idx);
161 if (access (tty_name, F_OK) < 0) 162 if (access (tty_name, F_OK) < 0)
162 { 163 {
163 idx = 256; 164 idx = 256;
164 break; 165 break;
165 } 166 }
167
166 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
167 { 169 {
168 if (access (tty_name, R_OK | W_OK) == 0) 170 if (access (tty_name, R_OK | W_OK) == 0)
169 { 171 {
170 *ttydev = strdup (tty_name); 172 *ttydev = strdup (tty_name);
171 return pfd; 173 return pfd;
172 } 174 }
175
173 close (pfd); 176 close (pfd);
174 } 177 }
175 } 178 }
176 } 179 }
177#endif 180#endif
181
178#ifdef PTYS_ARE_SEARCHED 182#ifdef PTYS_ARE_SEARCHED
179 { 183 {
180 const char *c1, *c2; 184 const char *c1, *c2;
181 char pty_name[] = "/dev/pty??"; 185 char pty_name[] = "/dev/pty??";
182 char tty_name[] = "/dev/tty??"; 186 char tty_name[] = "/dev/tty??";
183 187
184# ifndef PTYCHAR1 188# ifndef PTYCHAR1
185# define PTYCHAR1 "pqrstuvwxyz" 189# define PTYCHAR1 "pqrstuvwxyz"
186# endif 190# endif
187# ifndef PTYCHAR2 191# ifndef PTYCHAR2
… …
201 if (access (tty_name, R_OK | W_OK) == 0) 205 if (access (tty_name, R_OK | W_OK) == 0)
202 { 206 {
203 *ttydev = strdup (tty_name); 207 *ttydev = strdup (tty_name);
204 return pfd; 208 return pfd;
205 } 209 }
210
206 close (pfd); 211 close (pfd);
207 } 212 }
208 } 213 }
209 } 214 }
210 } 215 }
211#endif 216#endif
217
212 return -1; 218 return -1;
213} 219}
214 220
215/*----------------------------------------------------------------------*/ 221/*----------------------------------------------------------------------*/
216/* 222/*
217 * Returns tty file descriptor, or -1 on failure 223 * Returns tty file descriptor, or -1 on failure
218 */ 224 */
219/* EXTPROTO */ 225static int
220int
221rxvt_get_tty (const char *ttydev) 226get_tty (char *ttydev)
222{ 227{
223 return open (ttydev, O_RDWR | O_NOCTTY, 0); 228 return open (ttydev, O_RDWR | O_NOCTTY, 0);
224} 229}
225 230
226/*----------------------------------------------------------------------*/ 231/*----------------------------------------------------------------------*/
227/* 232/*
228 * Make our tty a controlling tty so that /dev/tty points to us 233 * Make our tty a controlling tty so that /dev/tty points to us
229 */ 234 */
230/* EXTPROTO */ 235static int
231int
232rxvt_control_tty (int fd_tty, const char *ttydev) 236control_tty (int fd_tty, const char *ttydev)
233{ 237{
234#ifndef __QNX__ 238#ifndef __QNX__
235 int fd; 239 int fd;
236 240
237 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
238 /* ---------------------------------------- */ 241 /* ---------------------------------------- */
239# ifdef HAVE_SETSID 242# ifdef HAVE_SETSID
240 setsid (); 243 setsid ();
241# endif 244# endif
242# if defined(HAVE_SETPGID) 245# if defined(HAVE_SETPGID)
243 setpgid (0, 0); 246 setpgid (0, 0);
244# elif defined(HAVE_SETPGRP) 247# elif defined(HAVE_SETPGRP)
245 setpgrp (0, 0); 248 setpgrp (0, 0);
246# endif 249# endif
250
247 /* ---------------------------------------- */ 251 /* ---------------------------------------- */
248# ifdef TIOCNOTTY 252# ifdef TIOCNOTTY
249
250 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 253 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) 254 if (fd >= 0)
253 { 255 {
254 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 256 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
255 close (fd); 257 close (fd);
256 } 258 }
257# endif 259# endif
260
258 /* ---------------------------------------- */ 261 /* ---------------------------------------- */
259 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 262 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) 263 if (fd >= 0)
262 close (fd); /* ouch: still have controlling tty */ 264 close (fd); /* ouch: still have controlling tty */
265
263 /* ---------------------------------------- */ 266 /* ---------------------------------------- */
264#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
265 /* 268 /*
266 * Push STREAMS modules: 269 * Push STREAMS modules:
267 * ptem: pseudo-terminal hardware emulation module. 270 * ptem: pseudo-terminal hardware emulation module.
… …
281 */ 284 */
282# ifdef HAVE_ISASTREAM 285# ifdef HAVE_ISASTREAM
283 if (isastream (fd_tty) == 1) 286 if (isastream (fd_tty) == 1)
284# endif 287# endif
285 { 288 {
286 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
287 ioctl (fd_tty, I_PUSH, "ptem"); 289 ioctl (fd_tty, I_PUSH, "ptem");
288 ioctl (fd_tty, I_PUSH, "ldterm"); 290 ioctl (fd_tty, I_PUSH, "ldterm");
289 ioctl (fd_tty, I_PUSH, "ttcompat"); 291 ioctl (fd_tty, I_PUSH, "ttcompat");
290 } 292 }
291#endif 293#endif
292 /* ---------------------------------------- */ 294 /* ---------------------------------------- */
293# if defined(TIOCSCTTY) 295# if defined(TIOCSCTTY)
294 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 296 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
295 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
296# elif defined(TIOCSETCTTY) 297# elif defined(TIOCSETCTTY)
297 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 298 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
298 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
299# else 299# else
300 fd = open (ttydev, O_RDWR); 300 fd = open (ttydev, O_RDWR);
301 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
302 if (fd >= 0) 301 if (fd >= 0)
303 close (fd); 302 close (fd);
304# endif 303# endif
305 /* ---------------------------------------- */ 304 /* ---------------------------------------- */
306 fd = open ("/dev/tty", O_WRONLY); 305 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) 306 if (fd < 0)
309 return -1; /* fatal */ 307 return -1; /* fatal */
310 close (fd); 308 close (fd);
311 /* ---------------------------------------- */ 309 /* ---------------------------------------- */
312 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
313 /* ---------------------------------------- */
314#endif /* ! __QNX__ */ 310#endif /* ! __QNX__ */
315 311
316 return 0; 312 return 0;
317} 313}
314
315#ifndef NO_SETOWNER_TTYDEV
316static struct ttyconf {
317 gid_t gid;
318 mode_t mode;
319
320 ttyconf ()
321 {
322#ifdef TTY_GID_SUPPORT
323 struct group *gr = getgrnam ("tty");
324
325 if (gr)
326 { /* change group ownership of tty to "tty" */
327 mode = S_IRUSR | S_IWUSR | S_IWGRP;
328 gid = gr->gr_gid;
329 }
330 else
331#endif /* TTY_GID_SUPPORT */
332 {
333 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
334 gid = getgid ();
335 }
336 }
337} ttyconf;
338
339void
340rxvt_ptytty::privileges (rxvt_privaction action)
341{
342 if (!name || !*name)
343 return;
344
345 rxvt_privileges (RESTORE);
346
347 if (action == SAVE)
348 {
349# ifndef RESET_TTY_TO_COMMON_DEFAULTS
350 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
351 if (lstat (name, &savestat) < 0) /* you lose out */
352 ;
353 else
354# endif
355 {
356 saved = true;
357 chown (name, getuid (), ttyconf.gid); /* fail silently */
358 chmod (name, ttyconf.mode);
359# ifdef HAVE_REVOKE
360 revoke (name);
361# endif
362 }
363 }
364 else
365 { /* action == RESTORE */
366# ifndef RESET_TTY_TO_COMMON_DEFAULTS
367 if (saved)
368 {
369 chmod (name, savestat.st_mode);
370 chown (name, savestat.st_uid, savestat.st_gid);
371 }
372# else
373 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
374 chown (name, 0, 0);
375# endif
376
377 }
378
379 rxvt_privileges (IGNORE);
380}
381#endif
382
383rxvt_ptytty::rxvt_ptytty ()
384{
385 pty = tty = -1;
386 name = 0;
387#ifndef NO_SETOWNER_TTYDEV
388 saved = false;
389#endif
390}
391
392rxvt_ptytty::~rxvt_ptytty ()
393{
394 put ();
395}
396
397void
398
399rxvt_ptytty::close_tty ()
400{
401 if (tty >= 0) close (tty);
402 tty = -1;
403}
404
405void
406rxvt_ptytty::put ()
407{
408#ifndef NO_SETOWNER_TTYDEV
409 if (tty >= 0)
410 privileges (RESTORE);
411#endif
412
413 if (pty >= 0) close (pty);
414 close_tty ();
415 free (name);
416
417 pty = tty = -1;
418 name = 0;
419}
420
421bool
422rxvt_ptytty::make_controlling_tty ()
423{
424 return control_tty (tty, name) >= 0;
425}
426
427bool
428rxvt_ptytty::get ()
429{
430 /* get master (pty) */
431 if ((pty = get_pty (&tty, &name)) < 0)
432 return false;
433
434 fcntl (pty, F_SETFL, O_NONBLOCK);
435
436 /* get slave (tty) */
437 if (tty < 0)
438 {
439#ifndef NO_SETOWNER_TTYDEV
440 privileges (SAVE);
441#endif
442
443 if ((tty = get_tty (name)) < 0)
444 {
445 put ();
446 return false;
447 }
448 }
449
450 return true;
451}
452
453void
454rxvt_ptytty::set_utf8_mode (bool on)
455{
456#ifdef IUTF8
457 if (pty != -1)
458 {
459 struct termios tio;
460
461 if (tcgetattr (pty, &tio) != -1)
462 {
463 tcflag_t new_cflag = tio.c_iflag;
464
465 if (on)
466 new_cflag |= IUTF8;
467 else
468 new_cflag &= ~IUTF8;
469
470 if (new_cflag != tio.c_iflag)
471 {
472 tio.c_iflag = new_cflag;
473 tcsetattr (pty, TCSANOW, &tio);
474 }
475 }
476 }
477#endif
478}
479
318/*----------------------- end-of-file (C source) -----------------------*/ 480/*----------------------- end-of-file (C source) -----------------------*/
481

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