… | |
… | |
5 | * File: ptytty.C |
5 | * File: ptytty.C |
6 | *----------------------------------------------------------------------* |
6 | *----------------------------------------------------------------------* |
7 | * |
7 | * |
8 | * All portions of code are copyright by their respective author/s. |
8 | * All portions of code are copyright by their respective author/s. |
9 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
9 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
10 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
10 | * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de> |
11 | * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
11 | * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
12 | * |
12 | * |
13 | * This program is free software; you can redistribute it and/or modify |
13 | * This program is free software; you can redistribute it and/or modify |
14 | * it under the terms of the GNU General Public License as published by |
14 | * it under the terms of the GNU General Public License as published by |
15 | * the Free Software Foundation; either version 2 of the License, or |
15 | * the Free Software Foundation; either version 2 of the License, or |
… | |
… | |
23 | * You should have received a copy of the GNU General Public License |
23 | * You should have received a copy of the GNU General Public License |
24 | * along with this program; if not, write to the Free Software |
24 | * along with this program; if not, write to the Free Software |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
26 | *---------------------------------------------------------------------*/ |
26 | *---------------------------------------------------------------------*/ |
27 | |
27 | |
28 | #include "../config.h" |
28 | #include "config.h" |
29 | |
29 | |
30 | #include "ptytty.h" |
30 | #include "ptytty.h" |
31 | |
31 | |
32 | #include <cstdlib> |
32 | #include <cstdlib> |
33 | #include <cstring> |
33 | #include <cstring> |
34 | #include <csignal> |
34 | #include <csignal> |
35 | |
35 | |
36 | #include <sys/types.h> |
36 | #include <sys/types.h> |
|
|
37 | #include <sys/stat.h> |
37 | #include <unistd.h> |
38 | #include <unistd.h> |
38 | #include <fcntl.h> |
39 | #include <fcntl.h> |
39 | |
40 | |
40 | #ifdef HAVE_SYS_IOCTL_H |
41 | #ifdef HAVE_SYS_IOCTL_H |
41 | # include <sys/ioctl.h> |
42 | # include <sys/ioctl.h> |
42 | #endif |
43 | #endif |
43 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) |
44 | #if defined(HAVE_SYS_STROPTS_H) |
44 | # include <sys/stropts.h> /* for I_PUSH */ |
45 | # include <sys/stropts.h> /* for I_PUSH */ |
45 | #endif |
46 | #endif |
46 | #ifdef HAVE_ISASTREAM |
47 | #if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H) |
47 | # include <stropts.h> |
48 | # include <stropts.h> |
48 | #endif |
49 | #endif |
49 | #if defined(HAVE_PTY_H) |
50 | #if defined(HAVE_PTY_H) |
50 | # include <pty.h> |
51 | # include <pty.h> |
51 | #elif defined(HAVE_LIBUTIL_H) |
52 | #elif defined(HAVE_LIBUTIL_H) |
… | |
… | |
77 | int pfd; |
78 | int pfd; |
78 | |
79 | |
79 | # if defined(HAVE_GETPT) |
80 | # if defined(HAVE_GETPT) |
80 | pfd = getpt(); |
81 | pfd = getpt(); |
81 | # elif defined(HAVE_POSIX_OPENPT) |
82 | # elif defined(HAVE_POSIX_OPENPT) |
82 | pfd = posix_openpt (O_RDWR); |
83 | pfd = posix_openpt (O_RDWR | O_NOCTTY); |
83 | # else |
84 | # else |
|
|
85 | # ifdef _AIX |
84 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
86 | pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0); |
|
|
87 | # else |
|
|
88 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
|
|
89 | # endif |
85 | # endif |
90 | # endif |
86 | |
91 | |
87 | if (pfd >= 0) |
92 | if (pfd >= 0) |
88 | { |
93 | { |
89 | if (grantpt (pfd) == 0 /* change slave permissions */ |
94 | if (grantpt (pfd) == 0 /* change slave permissions */ |
90 | && unlockpt (pfd) == 0) |
95 | && unlockpt (pfd) == 0) |
|
|
96 | { |
91 | { /* slave now unlocked */ |
97 | /* slave now unlocked */ |
92 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
98 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
93 | return pfd; |
99 | return pfd; |
94 | } |
100 | } |
95 | |
101 | |
96 | close (pfd); |
102 | close (pfd); |
… | |
… | |
104 | static int |
110 | static int |
105 | get_pty (int *fd_tty, char **ttydev) |
111 | get_pty (int *fd_tty, char **ttydev) |
106 | { |
112 | { |
107 | int pfd; |
113 | int pfd; |
108 | int res; |
114 | int res; |
109 | char tty_name[32]; |
|
|
110 | |
115 | |
111 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
116 | res = openpty (&pfd, fd_tty, NULL, NULL, NULL); |
112 | |
117 | |
113 | if (res != -1) |
118 | if (res != -1) |
114 | { |
119 | { |
115 | *ttydev = strdup (tty_name); |
120 | *ttydev = strdup (ttyname (*fd_tty)); |
116 | return pfd; |
121 | return pfd; |
117 | } |
122 | } |
118 | |
123 | |
119 | return -1; |
124 | return -1; |
120 | } |
125 | } |
… | |
… | |
123 | |
128 | |
124 | static int |
129 | static int |
125 | get_pty (int *fd_tty, char **ttydev) |
130 | get_pty (int *fd_tty, char **ttydev) |
126 | { |
131 | { |
127 | int pfd; |
132 | int pfd; |
|
|
133 | char *slave; |
128 | |
134 | |
129 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
135 | slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
130 | |
136 | |
131 | if (*ttydev != NULL) |
137 | if (slave != NULL) |
132 | return pfd; |
|
|
133 | |
|
|
134 | return -1; |
|
|
135 | } |
|
|
136 | |
|
|
137 | #elif defined(HAVE_DEV_PTC) |
|
|
138 | |
|
|
139 | static int |
|
|
140 | get_pty (int *fd_tty, char **ttydev) |
|
|
141 | { |
|
|
142 | int pfd; |
|
|
143 | |
|
|
144 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
145 | { |
138 | { |
146 | *ttydev = strdup (ttyname (pfd)); |
|
|
147 | return pfd; |
|
|
148 | } |
|
|
149 | |
|
|
150 | return -1; |
|
|
151 | } |
|
|
152 | |
|
|
153 | #elif defined(HAVE_DEV_CLONE) |
|
|
154 | |
|
|
155 | static int |
|
|
156 | get_pty (int *fd_tty, char **ttydev) |
|
|
157 | { |
|
|
158 | int pfd; |
|
|
159 | |
|
|
160 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
161 | { |
|
|
162 | *ttydev = strdup (ptsname (pfd)); |
139 | *ttydev = strdup (slave); |
163 | return pfd; |
140 | return pfd; |
164 | } |
141 | } |
165 | |
142 | |
166 | return -1; |
143 | return -1; |
167 | } |
144 | } |
… | |
… | |
221 | * Make our tty a controlling tty so that /dev/tty points to us |
198 | * Make our tty a controlling tty so that /dev/tty points to us |
222 | */ |
199 | */ |
223 | static int |
200 | static int |
224 | control_tty (int fd_tty) |
201 | control_tty (int fd_tty) |
225 | { |
202 | { |
|
|
203 | int fd; |
|
|
204 | |
226 | setsid (); |
205 | setsid (); |
227 | |
206 | |
228 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
207 | #ifdef TIOCSCTTY |
|
|
208 | ioctl (fd_tty, TIOCSCTTY, NULL); |
|
|
209 | #else |
|
|
210 | fd = open (ttyname (fd_tty), O_RDWR); |
|
|
211 | if (fd >= 0) |
|
|
212 | close (fd); |
|
|
213 | #endif |
|
|
214 | |
|
|
215 | fd = open ("/dev/tty", O_WRONLY); |
|
|
216 | if (fd < 0) |
|
|
217 | return -1; /* fatal */ |
|
|
218 | |
|
|
219 | close (fd); |
|
|
220 | |
|
|
221 | return 0; |
|
|
222 | } |
|
|
223 | |
|
|
224 | void |
|
|
225 | ptytty::close_tty () |
|
|
226 | { |
|
|
227 | if (tty < 0) |
|
|
228 | return; |
|
|
229 | |
|
|
230 | close (tty); |
|
|
231 | tty = -1; |
|
|
232 | } |
|
|
233 | |
|
|
234 | bool |
|
|
235 | ptytty::make_controlling_tty () |
|
|
236 | { |
|
|
237 | return control_tty (tty) >= 0; |
|
|
238 | } |
|
|
239 | |
|
|
240 | void |
|
|
241 | ptytty::set_utf8_mode (bool on) |
|
|
242 | { |
|
|
243 | #ifdef IUTF8 |
|
|
244 | if (pty < 0) |
|
|
245 | return; |
|
|
246 | |
|
|
247 | struct termios tio; |
|
|
248 | |
|
|
249 | if (tcgetattr (pty, &tio) != -1) |
|
|
250 | { |
|
|
251 | tcflag_t new_cflag = tio.c_iflag; |
|
|
252 | |
|
|
253 | if (on) |
|
|
254 | new_cflag |= IUTF8; |
|
|
255 | else |
|
|
256 | new_cflag &= ~IUTF8; |
|
|
257 | |
|
|
258 | if (new_cflag != tio.c_iflag) |
|
|
259 | { |
|
|
260 | tio.c_iflag = new_cflag; |
|
|
261 | tcsetattr (pty, TCSANOW, &tio); |
|
|
262 | } |
|
|
263 | } |
|
|
264 | #endif |
|
|
265 | } |
|
|
266 | |
|
|
267 | static struct ttyconf { |
|
|
268 | gid_t gid; |
|
|
269 | mode_t mode; |
|
|
270 | |
|
|
271 | ttyconf () |
|
|
272 | { |
|
|
273 | #ifdef TTY_GID_SUPPORT |
|
|
274 | struct group *gr = getgrnam ("tty"); |
|
|
275 | |
|
|
276 | if (gr) |
|
|
277 | { |
|
|
278 | /* change group ownership of tty to "tty" */ |
|
|
279 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
|
|
280 | gid = gr->gr_gid; |
|
|
281 | } |
|
|
282 | else |
|
|
283 | #endif /* TTY_GID_SUPPORT */ |
|
|
284 | { |
|
|
285 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
|
|
286 | gid = 0; |
|
|
287 | } |
|
|
288 | } |
|
|
289 | } ttyconf; |
|
|
290 | |
|
|
291 | ptytty_unix::ptytty_unix () |
|
|
292 | { |
|
|
293 | name = 0; |
|
|
294 | #if UTMP_SUPPORT |
|
|
295 | cmd_pid = 0; |
|
|
296 | #endif |
|
|
297 | } |
|
|
298 | |
|
|
299 | ptytty_unix::~ptytty_unix () |
|
|
300 | { |
|
|
301 | #if UTMP_SUPPORT |
|
|
302 | logout (); |
|
|
303 | #endif |
|
|
304 | put (); |
|
|
305 | } |
|
|
306 | |
|
|
307 | void |
|
|
308 | ptytty_unix::put () |
|
|
309 | { |
|
|
310 | if (name) |
|
|
311 | { |
|
|
312 | chmod (name, RESTORE_TTY_MODE); |
|
|
313 | chown (name, 0, ttyconf.gid); |
|
|
314 | } |
|
|
315 | |
|
|
316 | close_tty (); |
|
|
317 | |
|
|
318 | if (pty >= 0) |
|
|
319 | close (pty); |
|
|
320 | |
|
|
321 | free (name); |
|
|
322 | |
|
|
323 | pty = tty = -1; |
|
|
324 | name = 0; |
|
|
325 | } |
|
|
326 | |
|
|
327 | bool |
|
|
328 | ptytty_unix::get () |
|
|
329 | { |
|
|
330 | /* get master (pty) */ |
|
|
331 | if ((pty = get_pty (&tty, &name)) < 0) |
|
|
332 | return false; |
|
|
333 | |
|
|
334 | fcntl (pty, F_SETFL, O_NONBLOCK); |
|
|
335 | |
|
|
336 | /* get slave (tty) */ |
|
|
337 | if (tty < 0) |
|
|
338 | { |
|
|
339 | #ifndef NO_SETOWNER_TTYDEV |
|
|
340 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
341 | chmod (name, ttyconf.mode); |
|
|
342 | # ifdef HAVE_REVOKE |
|
|
343 | revoke (name); |
|
|
344 | # endif |
|
|
345 | #endif |
|
|
346 | |
|
|
347 | if ((tty = get_tty (name)) < 0) |
|
|
348 | { |
|
|
349 | put (); |
|
|
350 | return false; |
|
|
351 | } |
|
|
352 | } |
|
|
353 | |
|
|
354 | #if defined(I_PUSH) |
229 | /* |
355 | /* |
230 | * Push STREAMS modules: |
356 | * Push STREAMS modules: |
231 | * ptem: pseudo-terminal hardware emulation module. |
357 | * ptem: pseudo-terminal hardware emulation module. |
232 | * ldterm: standard terminal line discipline. |
358 | * ldterm: standard terminal line discipline. |
233 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
359 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
234 | * |
360 | * |
235 | * After we push the STREAMS modules, the first open () on the slave side |
361 | * After we push the STREAMS modules, the first open () on the slave side |
236 | * (i.e. the next section between the dashes giving us "tty opened OK") |
|
|
237 | * should make the "ptem" (or "ldterm" depending upon either which OS |
362 | * should make the "ptem" (or "ldterm" depending upon either which OS |
238 | * version or which set of manual pages you have) module give us a |
363 | * version or which set of manual pages you have) module give us a |
239 | * controlling terminal. We must already have close ()d the master side |
364 | * controlling terminal. We must already have close ()d the master side |
240 | * fd in this child process before we push STREAMS modules on because the |
365 | * fd in this child process before we push STREAMS modules on because the |
241 | * documentation is really unclear about whether it is any close () on |
366 | * documentation is really unclear about whether it is any close () on |
242 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
367 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
243 | * close () - on the master side which causes a hang up to be sent |
368 | * close () - on the master side which causes a hang up to be sent |
244 | * through - Geoff Wing |
369 | * through - Geoff Wing |
245 | */ |
370 | */ |
246 | # ifdef HAVE_ISASTREAM |
371 | #if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H) |
247 | if (isastream (fd_tty) == 1) |
372 | if (isastream (tty) == 1) |
248 | # endif |
373 | # endif |
249 | { |
374 | { |
250 | ioctl (fd_tty, I_PUSH, "ptem"); |
375 | ioctl (tty, I_PUSH, "ptem"); |
251 | ioctl (fd_tty, I_PUSH, "ldterm"); |
376 | ioctl (tty, I_PUSH, "ldterm"); |
252 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
377 | ioctl (tty, I_PUSH, "ttcompat"); |
253 | } |
|
|
254 | #endif |
|
|
255 | |
|
|
256 | ioctl (fd_tty, TIOCSCTTY, NULL); |
|
|
257 | |
|
|
258 | int fd = open ("/dev/tty", O_WRONLY); |
|
|
259 | if (fd < 0) |
|
|
260 | return -1; /* fatal */ |
|
|
261 | |
|
|
262 | close (fd); |
|
|
263 | |
|
|
264 | return 0; |
|
|
265 | } |
|
|
266 | |
|
|
267 | void |
|
|
268 | ptytty::close_tty () |
|
|
269 | { |
|
|
270 | if (tty < 0) |
|
|
271 | return; |
|
|
272 | |
|
|
273 | close (tty); |
|
|
274 | tty = -1; |
|
|
275 | } |
|
|
276 | |
|
|
277 | bool |
|
|
278 | ptytty::make_controlling_tty () |
|
|
279 | { |
|
|
280 | return control_tty (tty) >= 0; |
|
|
281 | } |
|
|
282 | |
|
|
283 | void |
|
|
284 | ptytty::set_utf8_mode (bool on) |
|
|
285 | { |
|
|
286 | #ifdef IUTF8 |
|
|
287 | if (pty < 0) |
|
|
288 | return; |
|
|
289 | |
|
|
290 | struct termios tio; |
|
|
291 | |
|
|
292 | if (tcgetattr (pty, &tio) != -1) |
|
|
293 | { |
378 | } |
294 | tcflag_t new_cflag = tio.c_iflag; |
|
|
295 | |
|
|
296 | if (on) |
|
|
297 | new_cflag |= IUTF8; |
|
|
298 | else |
|
|
299 | new_cflag &= ~IUTF8; |
|
|
300 | |
|
|
301 | if (new_cflag != tio.c_iflag) |
|
|
302 | { |
|
|
303 | tio.c_iflag = new_cflag; |
|
|
304 | tcsetattr (pty, TCSANOW, &tio); |
|
|
305 | } |
|
|
306 | } |
|
|
307 | #endif |
|
|
308 | } |
|
|
309 | |
|
|
310 | static struct ttyconf { |
|
|
311 | gid_t gid; |
|
|
312 | mode_t mode; |
|
|
313 | |
|
|
314 | ttyconf () |
|
|
315 | { |
|
|
316 | #ifdef TTY_GID_SUPPORT |
|
|
317 | struct group *gr = getgrnam ("tty"); |
|
|
318 | |
|
|
319 | if (gr) |
|
|
320 | { /* change group ownership of tty to "tty" */ |
|
|
321 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
|
|
322 | gid = gr->gr_gid; |
|
|
323 | } |
|
|
324 | else |
|
|
325 | #endif /* TTY_GID_SUPPORT */ |
|
|
326 | { |
|
|
327 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
|
|
328 | gid = 0; |
|
|
329 | } |
|
|
330 | } |
|
|
331 | } ttyconf; |
|
|
332 | |
|
|
333 | ptytty_unix::ptytty_unix () |
|
|
334 | { |
|
|
335 | name = 0; |
|
|
336 | #if UTMP_SUPPORT |
|
|
337 | cmd_pid = 0; |
|
|
338 | #endif |
|
|
339 | } |
|
|
340 | |
|
|
341 | ptytty_unix::~ptytty_unix () |
|
|
342 | { |
|
|
343 | #if UTMP_SUPPORT |
|
|
344 | logout (); |
|
|
345 | #endif |
|
|
346 | put (); |
|
|
347 | } |
|
|
348 | |
|
|
349 | void |
|
|
350 | ptytty_unix::put () |
|
|
351 | { |
|
|
352 | if (name) |
|
|
353 | { |
|
|
354 | chmod (name, RESTORE_TTY_MODE); |
|
|
355 | chown (name, 0, ttyconf.gid); |
|
|
356 | } |
|
|
357 | |
|
|
358 | close_tty (); |
|
|
359 | |
|
|
360 | if (pty >= 0) |
|
|
361 | close (pty); |
|
|
362 | |
|
|
363 | free (name); |
|
|
364 | |
|
|
365 | pty = tty = -1; |
|
|
366 | name = 0; |
|
|
367 | } |
|
|
368 | |
|
|
369 | bool |
|
|
370 | ptytty_unix::get () |
|
|
371 | { |
|
|
372 | /* get master (pty) */ |
|
|
373 | if ((pty = get_pty (&tty, &name)) < 0) |
|
|
374 | return false; |
|
|
375 | |
|
|
376 | fcntl (pty, F_SETFL, O_NONBLOCK); |
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377 | |
|
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378 | /* get slave (tty) */ |
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379 | if (tty < 0) |
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380 | { |
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381 | #ifndef NO_SETOWNER_TTYDEV |
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382 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
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383 | chmod (name, ttyconf.mode); |
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384 | # ifdef HAVE_REVOKE |
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385 | revoke (name); |
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386 | # endif |
379 | #endif |
387 | #endif |
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388 | |
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389 | if ((tty = get_tty (name)) < 0) |
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390 | { |
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391 | put (); |
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392 | return false; |
|
|
393 | } |
|
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394 | } |
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395 | |
380 | |
396 | return true; |
381 | return true; |
397 | } |
382 | } |
398 | |
383 | |