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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.4 by pcg, Tue Dec 2 21:49:46 2003 UTC vs.
Revision 1.38 by root, Tue Jan 17 11:53:07 2006 UTC

1/*--------------------------------*-C-*---------------------------------* 1/*--------------------------------*-C-*---------------------------------*
2 * File: ptytty.c 2 * File: ptytty.C
3 *----------------------------------------------------------------------* 3 *----------------------------------------------------------------------*
4 * $Id: ptytty.C,v 1.4 2003/12/02 21:49:46 pcg Exp $
5 * 4 *
6 * All portions of code are copyright by their respective author/s. 5 * All portions of code are copyright by their respective author/s.
7 * 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>
8 * 8 *
9 * 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
10 * 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
11 * the Free Software Foundation; either version 2 of the License, or 11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version. 12 * (at your option) any later version.
… …
20 * along with this program; if not, write to the Free Software 20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/ 22 *---------------------------------------------------------------------*/
23 23
24#include "../config.h" /* NECESSARY */ 24#include "../config.h" /* NECESSARY */
25#include "rxvt.h"
25 26
26/*
27 * Try to be self-contained except for the above autoconfig'd defines
28 */
29
30#include <stdio.h>
31#ifdef HAVE_STDLIB_H
32# include <stdlib.h> 27# include <cstdlib>
33#endif 28# include <cstring>
29
34#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
35# include <sys/types.h> 31# include <sys/types.h>
36#endif 32#endif
37#ifdef HAVE_UNISTD_H 33#ifdef HAVE_UNISTD_H
38# include <unistd.h> 34# include <unistd.h>
39#endif 35#endif
40#if defined(HAVE_STRING_H)
41# include <string.h>
42#endif
43#ifdef HAVE_FCNTL_H 36#ifdef HAVE_FCNTL_H
44# include <fcntl.h> 37# include <fcntl.h>
45#endif 38#endif
46#ifdef HAVE_SYS_IOCTL_H 39#ifdef HAVE_SYS_IOCTL_H
47# include <sys/ioctl.h> 40# include <sys/ioctl.h>
48#endif 41#endif
49#if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) 42#if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H)
50# include <sys/stropts.h> /* for I_PUSH */ 43# include <sys/stropts.h> /* for I_PUSH */
51#endif 44#endif
52 45#ifdef HAVE_ISASTREAM
53#ifdef DEBUG_TTY 46# include <stropts.h>
54# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
55#else
56# define D_TTY(x)
57#endif 47#endif
48#if defined(HAVE_PTY_H)
49# include <pty.h>
50#elif defined(HAVE_LIBUTIL_H)
51# include <libutil.h>
52#elif defined(HAVE_UTIL_H)
53# include <util.h>
54#endif
55
56#include <cstdio>
57#include <grp.h>
58
59/////////////////////////////////////////////////////////////////////////////
58 60
59/* ------------------------------------------------------------------------- * 61/* ------------------------------------------------------------------------- *
60 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 62 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
61 * ------------------------------------------------------------------------- */ 63 * ------------------------------------------------------------------------- */
62/* 64/*
63 * Returns pty file descriptor, or -1 on failure 65 * Returns pty file descriptor, or -1 on failure
64 * If successful, ttydev is set to the name of the slave device. 66 * If successful, ttydev is set to the name of the slave device.
65 * fd_tty _may_ also be set to an open fd to the slave device 67 * fd_tty _may_ also be set to an open fd to the slave device
66 */ 68 */
67/* EXTPROTO */ 69static int
68int
69rxvt_get_pty(int *fd_tty, const char **ttydev) 70get_pty (int *fd_tty, char **ttydev)
70{ 71{
71 int pfd; 72 int pfd;
72 73
73#ifdef PTYS_ARE_OPENPTY 74#ifdef PTYS_ARE_OPENPTY
74
75 char tty_name[sizeof "/dev/pts/????\0"]; 75 char tty_name[sizeof "/dev/pts/????\0"];
76 76
77 rxvt_privileges(RESTORE);
77 if (openpty(&pfd, fd_tty, tty_name, NULL, NULL) != -1) 78 int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL);
79 rxvt_privileges(IGNORE);
80
81 if (res != -1)
78 { 82 {
79 *ttydev = strdup(tty_name); 83 *ttydev = strdup (tty_name);
80 return pfd; 84 return pfd;
81 } 85 }
82#endif 86#endif
83 87
84#ifdef PTYS_ARE__GETPTY 88#ifdef PTYS_ARE__GETPTY
85 *ttydev = _getpty(&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); 89 *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0);
86 if (*ttydev != NULL) 90 if (*ttydev != NULL)
87 return pfd; 91 return pfd;
88#endif 92#endif
89 93
90#ifdef PTYS_ARE_GETPTY
91
92 char *ptydev;
93
94 while ((ptydev = getpty()) != NULL)
95 if ((pfd = open(ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
96 {
97 *ttydev = ptydev;
98 return pfd;
99 }
100#endif
101
102#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) 94#if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT)
103# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) 95# if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX)
104 96
105 { 97 {
106# ifdef PTYS_ARE_GETPT 98# ifdef PTYS_ARE_GETPT
107 pfd = getpt(); 99 pfd = getpt();
108# else 100# else
109 101# ifdef PTYS_ARE_POSIX
102 pfd = posix_openpt (O_RDWR);
103# else
110 pfd = open("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 104 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
105# endif
111# endif 106# endif
112 107
113 if (pfd >= 0) 108 if (pfd >= 0)
114 { 109 {
115 if (grantpt(pfd) == 0 /* change slave permissions */ 110 if (grantpt (pfd) == 0 /* change slave permissions */
116 && unlockpt(pfd) == 0) 111 && unlockpt (pfd) == 0)
117 { /* slave now unlocked */ 112 { /* slave now unlocked */
118 *ttydev = ptsname(pfd); /* get slave's name */ 113 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
119 return pfd; 114 return pfd;
120 } 115 }
121 close(pfd); 116 close (pfd);
122 } 117 }
123 } 118 }
124# endif 119# endif
125#endif 120#endif
126 121
127#ifdef PTYS_ARE_PTC 122#ifdef PTYS_ARE_PTC
128 if ((pfd = open("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 123 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
129 { 124 {
130 *ttydev = ttyname(pfd); 125 *ttydev = strdup (ttyname (pfd));
131 return pfd; 126 return pfd;
132 } 127 }
133#endif 128#endif
134 129
135#ifdef PTYS_ARE_CLONE 130#ifdef PTYS_ARE_CLONE
136 if ((pfd = open("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) 131 if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0)
137 { 132 {
138 *ttydev = ptsname(pfd); 133 *ttydev = strdup (ptsname (pfd));
139 return pfd; 134 return pfd;
140 } 135 }
141#endif 136#endif
142 137
143#ifdef PTYS_ARE_NUMERIC 138#ifdef PTYS_ARE_NUMERIC
144 { 139 {
145 int idx; 140 int idx;
146 char *c1, *c2; 141 char *c1, *c2;
147 char pty_name[] = "/dev/ptyp???"; 142 char pty_name[] = "/dev/ptyp???";
148 char tty_name[] = "/dev/ttyp???"; 143 char tty_name[] = "/dev/ttyp???";
149 144
150 c1 = &(pty_name[sizeof(pty_name) - 4]); 145 c1 = &(pty_name[sizeof (pty_name) - 4]);
151 c2 = &(tty_name[sizeof(tty_name) - 4]); 146 c2 = &(tty_name[sizeof (tty_name) - 4]);
152 for (idx = 0; idx < 256; idx++) 147 for (idx = 0; idx < 256; idx++)
153 { 148 {
154 sprintf(c1, "%d", idx); 149 sprintf (c1, "%d", idx);
155 sprintf(c2, "%d", idx); 150 sprintf (c2, "%d", idx);
156 if (access(tty_name, F_OK) < 0) 151 if (access (tty_name, F_OK) < 0)
157 { 152 {
158 idx = 256; 153 idx = 256;
159 break; 154 break;
160 } 155 }
156
161 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 157 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
162 { 158 {
163 if (access(tty_name, R_OK | W_OK) == 0) 159 if (access (tty_name, R_OK | W_OK) == 0)
164 { 160 {
165 *ttydev = strdup(tty_name); 161 *ttydev = strdup (tty_name);
166 return pfd; 162 return pfd;
167 } 163 }
164
168 close(pfd); 165 close (pfd);
169 } 166 }
170 } 167 }
171 } 168 }
172#endif 169#endif
170
173#ifdef PTYS_ARE_SEARCHED 171#ifdef PTYS_ARE_SEARCHED
174 { 172 {
175 const char *c1, *c2; 173 const char *c1, *c2;
176 char pty_name[] = "/dev/pty??"; 174 char pty_name[] = "/dev/pty??";
177 char tty_name[] = "/dev/tty??"; 175 char tty_name[] = "/dev/tty??";
178 176
179# ifndef PTYCHAR1 177# ifndef PTYCHAR1
180# define PTYCHAR1 "pqrstuvwxyz" 178# define PTYCHAR1 "pqrstuvwxyz"
181# endif 179# endif
182# ifndef PTYCHAR2 180# ifndef PTYCHAR2
183# define PTYCHAR2 "0123456789abcdef" 181# define PTYCHAR2 "0123456789abcdef"
184# endif 182# endif
185 183
186 for (c1 = PTYCHAR1; *c1; c1++) 184 for (c1 = PTYCHAR1; *c1; c1++)
187 { 185 {
188 pty_name[(sizeof(pty_name) - 3)] = 186 pty_name[ (sizeof (pty_name) - 3)] =
189 tty_name[(sizeof(pty_name) - 3)] = *c1; 187 tty_name[ (sizeof (pty_name) - 3)] = *c1;
190 for (c2 = PTYCHAR2; *c2; c2++) 188 for (c2 = PTYCHAR2; *c2; c2++)
191 { 189 {
192 pty_name[(sizeof(pty_name) - 2)] = 190 pty_name[ (sizeof (pty_name) - 2)] =
193 tty_name[(sizeof(pty_name) - 2)] = *c2; 191 tty_name[ (sizeof (pty_name) - 2)] = *c2;
194 if ((pfd = open(pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 192 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
195 { 193 {
196 if (access(tty_name, R_OK | W_OK) == 0) 194 if (access (tty_name, R_OK | W_OK) == 0)
197 { 195 {
198 *ttydev = strdup(tty_name); 196 *ttydev = strdup (tty_name);
199 return pfd; 197 return pfd;
200 } 198 }
199
201 close(pfd); 200 close (pfd);
202 } 201 }
203 } 202 }
204 } 203 }
205 } 204 }
206#endif 205#endif
206
207 return -1; 207 return -1;
208} 208}
209 209
210/*----------------------------------------------------------------------*/ 210/*----------------------------------------------------------------------*/
211/* 211/*
212 * Returns tty file descriptor, or -1 on failure 212 * Returns tty file descriptor, or -1 on failure
213 */ 213 */
214/* EXTPROTO */ 214static int
215int
216rxvt_get_tty (const char *ttydev) 215get_tty (char *ttydev)
217{ 216{
218 return open (ttydev, O_RDWR | O_NOCTTY, 0); 217 return open (ttydev, O_RDWR | O_NOCTTY, 0);
219} 218}
220 219
221/*----------------------------------------------------------------------*/ 220/*----------------------------------------------------------------------*/
222/* 221/*
223 * Make our tty a controlling tty so that /dev/tty points to us 222 * Make our tty a controlling tty so that /dev/tty points to us
224 */ 223 */
225/* EXTPROTO */ 224static int
226int 225control_tty (int fd_tty)
227rxvt_control_tty (int fd_tty, const char *ttydev)
228{ 226{
229#ifndef __QNX__
230 int fd; 227 int fd;
231 228
232 D_TTY ((stderr, "rxvt_control_tty(): pid: %d, tty fd: %d, dev: %s", getpid(), fd_tty, ttydev));
233 /* ---------------------------------------- */ 229 /* ---------------------------------------- */
234# ifdef HAVE_SETSID
235 setsid (); 230 setsid ();
236# endif 231
237# if defined(HAVE_SETPGID)
238 setpgid (0, 0);
239# elif defined(HAVE_SETPGRP)
240 setpgrp (0, 0);
241# endif
242 /* ---------------------------------------- */ 232 /* ---------------------------------------- */
243# ifdef TIOCNOTTY
244
245 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
246 D_TTY ((stderr, "rxvt_control_tty(): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
247 if (fd >= 0)
248 {
249 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
250 close (fd);
251 }
252# endif
253 /* ---------------------------------------- */
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 D_TTY ((stderr, "rxvt_control_tty(): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
256 if (fd >= 0)
257 close (fd); /* ouch: still have controlling tty */
258 /* ---------------------------------------- */
259#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 233# if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
260 /* 234 /*
261 * Push STREAMS modules: 235 * Push STREAMS modules:
262 * ptem: pseudo-terminal hardware emulation module. 236 * ptem: pseudo-terminal hardware emulation module.
263 * ldterm: standard terminal line discipline. 237 * ldterm: standard terminal line discipline.
264 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. 238 * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module.
265 * 239 *
266 * After we push the STREAMS modules, the first open() on the slave side 240 * After we push the STREAMS modules, the first open () on the slave side
267 * (i.e. the next section between the dashes giving us "tty opened OK") 241 * (i.e. the next section between the dashes giving us "tty opened OK")
268 * should make the "ptem" (or "ldterm" depending upon either which OS 242 * should make the "ptem" (or "ldterm" depending upon either which OS
269 * version or which set of manual pages you have) module give us a 243 * version or which set of manual pages you have) module give us a
270 * controlling terminal. We must already have close()d the master side 244 * controlling terminal. We must already have close ()d the master side
271 * fd in this child process before we push STREAMS modules on because the 245 * fd in this child process before we push STREAMS modules on because the
272 * documentation is really unclear about whether it is any close() on 246 * documentation is really unclear about whether it is any close () on
273 * the master side or the last close() - i.e. a proper STREAMS dismantling 247 * the master side or the last close () - i.e. a proper STREAMS dismantling
274 * close() - on the master side which causes a hang up to be sent 248 * close () - on the master side which causes a hang up to be sent
275 * through - Geoff Wing 249 * through - Geoff Wing
276 */ 250 */
277# ifdef HAVE_ISASTREAM 251# ifdef HAVE_ISASTREAM
278 if (isastream (fd_tty) == 1) 252 if (isastream (fd_tty) == 1)
279# endif 253# endif
280 { 254 {
281 D_TTY ((stderr, "rxvt_control_tty(): Pushing STREAMS modules"));
282 ioctl (fd_tty, I_PUSH, "ptem"); 255 ioctl (fd_tty, I_PUSH, "ptem");
283 ioctl (fd_tty, I_PUSH, "ldterm"); 256 ioctl (fd_tty, I_PUSH, "ldterm");
284 ioctl (fd_tty, I_PUSH, "ttcompat"); 257 ioctl (fd_tty, I_PUSH, "ttcompat");
285 } 258 }
286#endif 259# endif
287 /* ---------------------------------------- */ 260 /* ---------------------------------------- */
288# if defined(TIOCSCTTY)
289 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 261 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
290 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSCTTY): %d", fd));
291# elif defined(TIOCSETCTTY)
292 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
293 D_TTY ((stderr, "rxvt_control_tty(): ioctl(..,TIOCSETCTTY): %d", fd));
294# else
295 fd = open (ttydev, O_RDWR);
296 D_TTY ((stderr, "rxvt_control_tty(): tty open%s", fd < 0 ? " failure" : "ed OK"));
297 if (fd >= 0)
298 close(fd);
299# endif
300 /* ---------------------------------------- */ 262 /* ---------------------------------------- */
301 fd = open ("/dev/tty", O_WRONLY); 263 fd = open ("/dev/tty", O_WRONLY);
302 D_TTY ((stderr, "rxvt_control_tty(): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
303 if (fd < 0) 264 if (fd < 0)
304 return -1; /* fatal */ 265 return -1; /* fatal */
305 close (fd); 266 close (fd);
306 /* ---------------------------------------- */ 267 /* ---------------------------------------- */
307 D_TTY ((stderr, "rxvt_control_tty(): tcgetpgrp(): %d getpgrp(): %d", tcgetpgrp(fd_tty), getpgrp()));
308 /* ---------------------------------------- */
309#endif /* ! __QNX__ */
310 268
311 return 0; 269 return 0;
312} 270}
271
272void
273rxvt_ptytty::close_tty ()
274{
275 if (tty < 0)
276 return;
277
278 close (tty);
279 tty = -1;
280}
281
282bool
283rxvt_ptytty::make_controlling_tty ()
284{
285 return control_tty (tty) >= 0;
286}
287
288void
289rxvt_ptytty::set_utf8_mode (bool on)
290{
291#ifdef IUTF8
292 if (pty < 0)
293 return;
294
295 struct termios tio;
296
297 if (tcgetattr (pty, &tio) != -1)
298 {
299 tcflag_t new_cflag = tio.c_iflag;
300
301 if (on)
302 new_cflag |= IUTF8;
303 else
304 new_cflag &= ~IUTF8;
305
306 if (new_cflag != tio.c_iflag)
307 {
308 tio.c_iflag = new_cflag;
309 tcsetattr (pty, TCSANOW, &tio);
310 }
311 }
312#endif
313}
314
315/////////////////////////////////////////////////////////////////////////////
316
317#ifndef NO_SETOWNER_TTYDEV
318static struct ttyconf {
319 gid_t gid;
320 mode_t mode;
321
322 ttyconf ()
323 {
324#ifdef TTY_GID_SUPPORT
325 struct group *gr = getgrnam ("tty");
326
327 if (gr)
328 { /* change group ownership of tty to "tty" */
329 mode = S_IRUSR | S_IWUSR | S_IWGRP;
330 gid = gr->gr_gid;
331 }
332 else
333#endif /* TTY_GID_SUPPORT */
334 {
335 mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH;
336 gid = getgid ();
337 }
338 }
339} ttyconf;
340
341/////////////////////////////////////////////////////////////////////////////
342
343void
344rxvt_ptytty_unix::privileges (rxvt_privaction action)
345{
346 if (!name || !*name)
347 return;
348
349 rxvt_privileges (RESTORE);
350
351 if (action == SAVE)
352 {
353# ifndef RESET_TTY_TO_COMMON_DEFAULTS
354 /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */
355 if (lstat (name, &savestat) < 0) /* you lose out */
356 ;
357 else
358# endif
359 {
360 saved = true;
361 chown (name, getuid (), ttyconf.gid); /* fail silently */
362 chmod (name, ttyconf.mode);
363# ifdef HAVE_REVOKE
364 revoke (name);
365# endif
366 }
367 }
368 else
369 { /* action == RESTORE */
370# ifndef RESET_TTY_TO_COMMON_DEFAULTS
371 if (saved)
372 {
373 chmod (name, savestat.st_mode);
374 chown (name, savestat.st_uid, savestat.st_gid);
375 }
376# else
377 chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH));
378 chown (name, 0, 0);
379# endif
380
381 }
382
383 rxvt_privileges (IGNORE);
384}
385#endif
386
387rxvt_ptytty_unix::rxvt_ptytty_unix ()
388{
389 pty = tty = -1;
390 name = 0;
391#ifndef NO_SETOWNER_TTYDEV
392 saved = false;
393#endif
394#if UTMP_SUPPORT
395 cmd_pid = 0;
396#endif
397}
398
399rxvt_ptytty_unix::~rxvt_ptytty_unix ()
400{
401 logout ();
402 put ();
403}
404
405void
406rxvt_ptytty_unix::put ()
407{
408#ifndef NO_SETOWNER_TTYDEV
409 privileges (RESTORE);
410#endif
411
412 if (pty >= 0) close (pty);
413 close_tty ();
414 free (name);
415
416 pty = tty = -1;
417 name = 0;
418}
419
420bool
421rxvt_ptytty_unix::get ()
422{
423 /* get master (pty) */
424 if ((pty = get_pty (&tty, &name)) < 0)
425 return false;
426
427 fcntl (pty, F_SETFL, O_NONBLOCK);
428
429 /* get slave (tty) */
430 if (tty < 0)
431 {
432#ifndef NO_SETOWNER_TTYDEV
433 privileges (SAVE);
434#endif
435
436 if ((tty = get_tty (name)) < 0)
437 {
438 put ();
439 return false;
440 }
441 }
442
443 return true;
444}
445
313/*----------------------- end-of-file (C source) -----------------------*/ 446/*----------------------- end-of-file (C source) -----------------------*/
447

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