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Comparing rxvt-unicode/src/ptytty.C (file contents):
Revision 1.12 by root, Fri Aug 13 03:36:57 2004 UTC vs.
Revision 1.29 by root, Fri Jan 6 02:11:15 2006 UTC

… …
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#if 0
31#ifdef HAVE_GETPT
32# define _GNU_SOURCE
33#endif
34#endif
35
36#include <cstdio>
37#ifdef HAVE_STDLIB_H 27#ifdef HAVE_STDLIB_H
38# include <cstdlib> 28# include <cstdlib>
39#endif 29#endif
40#ifdef HAVE_SYS_TYPES_H 30#ifdef HAVE_SYS_TYPES_H
41# include <sys/types.h> 31# include <sys/types.h>
… …
56# include <sys/stropts.h> /* for I_PUSH */ 46# include <sys/stropts.h> /* for I_PUSH */
57#endif 47#endif
58#ifdef HAVE_ISASTREAM 48#ifdef HAVE_ISASTREAM
59# include <stropts.h> 49# include <stropts.h>
60#endif 50#endif
61 51#ifdef HAVE_PTY_H
62#ifdef DEBUG_TTY 52# include <pty.h>
63# define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr)
64#else
65# define D_TTY(x)
66#endif 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>
67 64
68/* ------------------------------------------------------------------------- * 65/* ------------------------------------------------------------------------- *
69 * GET PSEUDO TELETYPE - MASTER AND SLAVE * 66 * GET PSEUDO TELETYPE - MASTER AND SLAVE *
70 * ------------------------------------------------------------------------- */ 67 * ------------------------------------------------------------------------- */
71/* 68/*
72 * Returns pty file descriptor, or -1 on failure 69 * Returns pty file descriptor, or -1 on failure
73 * 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.
74 * 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
75 */ 72 */
76/* EXTPROTO */ 73static int
77int
78rxvt_get_pty (int *fd_tty, const char **ttydev) 74get_pty (int *fd_tty, char **ttydev)
79{ 75{
80 int pfd; 76 int pfd;
81 77
82#ifdef PTYS_ARE_OPENPTY 78#ifdef PTYS_ARE_OPENPTY
83
84 char tty_name[sizeof "/dev/pts/????\0"]; 79 char tty_name[sizeof "/dev/pts/????\0"];
85 80
81 rxvt_privileges(RESTORE);
86 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)
87 { 86 {
88 *ttydev = strdup (tty_name); 87 *ttydev = strdup (tty_name);
89 return pfd; 88 return pfd;
90 } 89 }
91#endif 90#endif
… …
95 if (*ttydev != NULL) 94 if (*ttydev != NULL)
96 return pfd; 95 return pfd;
97#endif 96#endif
98 97
99#ifdef PTYS_ARE_GETPTY 98#ifdef PTYS_ARE_GETPTY
100
101 char *ptydev; 99 char *ptydev;
102 100
103 while ((ptydev = getpty ()) != NULL) 101 while ((ptydev = getpty ()) != NULL)
104 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) 102 if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0)
105 { 103 {
… …
113 111
114 { 112 {
115# ifdef PTYS_ARE_GETPT 113# ifdef PTYS_ARE_GETPT
116 pfd = getpt (); 114 pfd = getpt ();
117# else 115# else
118
119 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); 116 pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0);
120# endif 117# endif
121 118
122 if (pfd >= 0) 119 if (pfd >= 0)
123 { 120 {
124 if (grantpt (pfd) == 0 /* change slave permissions */ 121 if (grantpt (pfd) == 0 /* change slave permissions */
125 && unlockpt (pfd) == 0) 122 && unlockpt (pfd) == 0)
126 { /* slave now unlocked */ 123 { /* slave now unlocked */
127 *ttydev = ptsname (pfd); /* get slave's name */ 124 *ttydev = strdup (ptsname (pfd)); /* get slave's name */
128 return pfd; 125 return pfd;
129 } 126 }
130 close (pfd); 127 close (pfd);
131 } 128 }
132 } 129 }
… …
134#endif 131#endif
135 132
136#ifdef PTYS_ARE_PTC 133#ifdef PTYS_ARE_PTC
137 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) 134 if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0)
138 { 135 {
139 *ttydev = ttyname (pfd); 136 *ttydev = strdup (ttyname (pfd));
140 return pfd; 137 return pfd;
141 } 138 }
142#endif 139#endif
143 140
144#ifdef PTYS_ARE_CLONE 141#ifdef PTYS_ARE_CLONE
145 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)
146 { 143 {
147 *ttydev = ptsname (pfd); 144 *ttydev = strdup (ptsname (pfd));
148 return pfd; 145 return pfd;
149 } 146 }
150#endif 147#endif
151 148
152#ifdef PTYS_ARE_NUMERIC 149#ifdef PTYS_ARE_NUMERIC
153 { 150 {
154 int idx; 151 int idx;
155 char *c1, *c2; 152 char *c1, *c2;
156 char pty_name[] = "/dev/ptyp???"; 153 char pty_name[] = "/dev/ptyp???";
157 char tty_name[] = "/dev/ttyp???"; 154 char tty_name[] = "/dev/ttyp???";
158 155
159 c1 = & (pty_name[sizeof (pty_name) - 4]); 156 c1 = &(pty_name[sizeof (pty_name) - 4]);
160 c2 = & (tty_name[sizeof (tty_name) - 4]); 157 c2 = &(tty_name[sizeof (tty_name) - 4]);
161 for (idx = 0; idx < 256; idx++) 158 for (idx = 0; idx < 256; idx++)
162 { 159 {
163 sprintf (c1, "%d", idx); 160 sprintf (c1, "%d", idx);
164 sprintf (c2, "%d", idx); 161 sprintf (c2, "%d", idx);
165 if (access (tty_name, F_OK) < 0) 162 if (access (tty_name, F_OK) < 0)
166 { 163 {
167 idx = 256; 164 idx = 256;
168 break; 165 break;
169 } 166 }
167
170 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) 168 if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0)
171 { 169 {
172 if (access (tty_name, R_OK | W_OK) == 0) 170 if (access (tty_name, R_OK | W_OK) == 0)
173 { 171 {
174 *ttydev = strdup (tty_name); 172 *ttydev = strdup (tty_name);
175 return pfd; 173 return pfd;
176 } 174 }
175
177 close (pfd); 176 close (pfd);
178 } 177 }
179 } 178 }
180 } 179 }
181#endif 180#endif
181
182#ifdef PTYS_ARE_SEARCHED 182#ifdef PTYS_ARE_SEARCHED
183 { 183 {
184 const char *c1, *c2; 184 const char *c1, *c2;
185 char pty_name[] = "/dev/pty??"; 185 char pty_name[] = "/dev/pty??";
186 char tty_name[] = "/dev/tty??"; 186 char tty_name[] = "/dev/tty??";
187 187
188# ifndef PTYCHAR1 188# ifndef PTYCHAR1
189# define PTYCHAR1 "pqrstuvwxyz" 189# define PTYCHAR1 "pqrstuvwxyz"
190# endif 190# endif
191# ifndef PTYCHAR2 191# ifndef PTYCHAR2
… …
205 if (access (tty_name, R_OK | W_OK) == 0) 205 if (access (tty_name, R_OK | W_OK) == 0)
206 { 206 {
207 *ttydev = strdup (tty_name); 207 *ttydev = strdup (tty_name);
208 return pfd; 208 return pfd;
209 } 209 }
210
210 close (pfd); 211 close (pfd);
211 } 212 }
212 } 213 }
213 } 214 }
214 } 215 }
215#endif 216#endif
217
216 return -1; 218 return -1;
217} 219}
218 220
219/*----------------------------------------------------------------------*/ 221/*----------------------------------------------------------------------*/
220/* 222/*
221 * Returns tty file descriptor, or -1 on failure 223 * Returns tty file descriptor, or -1 on failure
222 */ 224 */
223/* EXTPROTO */ 225static int
224int
225rxvt_get_tty (const char *ttydev) 226get_tty (char *ttydev)
226{ 227{
227 return open (ttydev, O_RDWR | O_NOCTTY, 0); 228 return open (ttydev, O_RDWR | O_NOCTTY, 0);
228} 229}
229 230
230/*----------------------------------------------------------------------*/ 231/*----------------------------------------------------------------------*/
231/* 232/*
232 * 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
233 */ 234 */
234/* EXTPROTO */ 235static int
235int
236rxvt_control_tty (int fd_tty, const char *ttydev) 236control_tty (int fd_tty, const char *ttydev)
237{ 237{
238#ifndef __QNX__ 238#ifndef __QNX__
239 int fd; 239 int fd;
240 240
241 D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev));
242 /* ---------------------------------------- */ 241 /* ---------------------------------------- */
243# ifdef HAVE_SETSID 242# ifdef HAVE_SETSID
244 setsid (); 243 setsid ();
245# endif 244# endif
246# if defined(HAVE_SETPGID) 245# if defined(HAVE_SETPGID)
247 setpgid (0, 0); 246 setpgid (0, 0);
248# elif defined(HAVE_SETPGRP) 247# elif defined(HAVE_SETPGRP)
249 setpgrp (0, 0); 248 setpgrp (0, 0);
250# endif 249# endif
250
251 /* ---------------------------------------- */ 251 /* ---------------------------------------- */
252# ifdef TIOCNOTTY 252# ifdef TIOCNOTTY
253
254 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 253 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
255 D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes"));
256 if (fd >= 0) 254 if (fd >= 0)
257 { 255 {
258 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ 256 ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */
259 close (fd); 257 close (fd);
260 } 258 }
261# endif 259# endif
260
262 /* ---------------------------------------- */ 261 /* ---------------------------------------- */
263 fd = open ("/dev/tty", O_RDWR | O_NOCTTY); 262 fd = open ("/dev/tty", O_RDWR | O_NOCTTY);
264 D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)"));
265 if (fd >= 0) 263 if (fd >= 0)
266 close (fd); /* ouch: still have controlling tty */ 264 close (fd); /* ouch: still have controlling tty */
265
267 /* ---------------------------------------- */ 266 /* ---------------------------------------- */
268#if defined(PTYS_ARE_PTMX) && defined(I_PUSH) 267#if defined(PTYS_ARE_PTMX) && defined(I_PUSH)
269 /* 268 /*
270 * Push STREAMS modules: 269 * Push STREAMS modules:
271 * ptem: pseudo-terminal hardware emulation module. 270 * ptem: pseudo-terminal hardware emulation module.
… …
285 */ 284 */
286# ifdef HAVE_ISASTREAM 285# ifdef HAVE_ISASTREAM
287 if (isastream (fd_tty) == 1) 286 if (isastream (fd_tty) == 1)
288# endif 287# endif
289 { 288 {
290 D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules"));
291 ioctl (fd_tty, I_PUSH, "ptem"); 289 ioctl (fd_tty, I_PUSH, "ptem");
292 ioctl (fd_tty, I_PUSH, "ldterm"); 290 ioctl (fd_tty, I_PUSH, "ldterm");
293 ioctl (fd_tty, I_PUSH, "ttcompat"); 291 ioctl (fd_tty, I_PUSH, "ttcompat");
294 } 292 }
295#endif 293#endif
296 /* ---------------------------------------- */ 294 /* ---------------------------------------- */
297# if defined(TIOCSCTTY) 295# if defined(TIOCSCTTY)
298 fd = ioctl (fd_tty, TIOCSCTTY, NULL); 296 fd = ioctl (fd_tty, TIOCSCTTY, NULL);
299 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd));
300# elif defined(TIOCSETCTTY) 297# elif defined(TIOCSETCTTY)
301 fd = ioctl (fd_tty, TIOCSETCTTY, NULL); 298 fd = ioctl (fd_tty, TIOCSETCTTY, NULL);
302 D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd));
303# else 299# else
304 fd = open (ttydev, O_RDWR); 300 fd = open (ttydev, O_RDWR);
305 D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK"));
306 if (fd >= 0) 301 if (fd >= 0)
307 close (fd); 302 close (fd);
308# endif 303# endif
309 /* ---------------------------------------- */ 304 /* ---------------------------------------- */
310 fd = open ("/dev/tty", O_WRONLY); 305 fd = open ("/dev/tty", O_WRONLY);
311 D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)"));
312 if (fd < 0) 306 if (fd < 0)
313 return -1; /* fatal */ 307 return -1; /* fatal */
314 close (fd); 308 close (fd);
315 /* ---------------------------------------- */ 309 /* ---------------------------------------- */
316 D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ()));
317 /* ---------------------------------------- */
318#endif /* ! __QNX__ */ 310#endif /* ! __QNX__ */
319 311
320 return 0; 312 return 0;
321} 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)
402 return;
403
404 close (tty);
405 tty = -1;
406}
407
408void
409rxvt_ptytty::put ()
410{
411#ifndef NO_SETOWNER_TTYDEV
412 privileges (RESTORE);
413#endif
414
415 if (pty >= 0) close (pty);
416 close_tty ();
417 free (name);
418
419 pty = tty = -1;
420 name = 0;
421}
422
423bool
424rxvt_ptytty::make_controlling_tty ()
425{
426 return control_tty (tty, name) >= 0;
427}
428
429bool
430rxvt_ptytty::get ()
431{
432 /* get master (pty) */
433 if ((pty = get_pty (&tty, &name)) < 0)
434 return false;
435
436 fcntl (pty, F_SETFL, O_NONBLOCK);
437
438 /* get slave (tty) */
439 if (tty < 0)
440 {
441#ifndef NO_SETOWNER_TTYDEV
442 privileges (SAVE);
443#endif
444
445 if ((tty = get_tty (name)) < 0)
446 {
447 put ();
448 return false;
449 }
450 }
451
452 return true;
453}
454
455void
456rxvt_ptytty::set_utf8_mode (bool on)
457{
458#ifdef IUTF8
459 if (pty < 0)
460 return;
461
462 struct termios tio;
463
464 if (tcgetattr (pty, &tio) != -1)
465 {
466 tcflag_t new_cflag = tio.c_iflag;
467
468 if (on)
469 new_cflag |= IUTF8;
470 else
471 new_cflag &= ~IUTF8;
472
473 if (new_cflag != tio.c_iflag)
474 {
475 tio.c_iflag = new_cflag;
476 tcsetattr (pty, TCSANOW, &tio);
477 }
478 }
479#endif
480}
481
322/*----------------------- end-of-file (C source) -----------------------*/ 482/*----------------------- end-of-file (C source) -----------------------*/
483

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