1 | /*--------------------------------*-C-*---------------------------------* |
1 | /*----------------------------------------------------------------------* |
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 | * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de> |
|
|
8 | * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
8 | * |
9 | * |
9 | * This program is free software; you can redistribute it and/or modify |
10 | * 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 |
11 | * 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 |
12 | * the Free Software Foundation; either version 2 of the License, or |
12 | * (at your option) any later version. |
13 | * (at your option) any later version. |
… | |
… | |
19 | * You should have received a copy of the GNU General Public License |
20 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software |
21 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
22 | *---------------------------------------------------------------------*/ |
23 | *---------------------------------------------------------------------*/ |
23 | |
24 | |
24 | #include "../config.h" /* NECESSARY */ |
25 | #include "config.h" |
25 | |
26 | |
26 | #include "fdpass.h" |
|
|
27 | #include "ptytty.h" |
27 | #include "ptytty.h" |
28 | |
28 | |
29 | #include <cstdlib> |
29 | #include <stdlib.h> |
|
|
30 | #include <stdio.h> |
30 | #include <cstring> |
31 | #include <string.h> |
31 | |
32 | |
32 | #include <sys/types.h> |
33 | #include <sys/types.h> |
33 | #include <sys/socket.h> |
34 | #include <sys/stat.h> |
34 | #include <unistd.h> |
35 | #include <unistd.h> |
35 | #include <fcntl.h> |
36 | #include <fcntl.h> |
36 | |
37 | |
37 | #ifdef HAVE_SYS_IOCTL_H |
38 | #ifdef HAVE_SYS_IOCTL_H |
38 | # include <sys/ioctl.h> |
39 | # include <sys/ioctl.h> |
39 | #endif |
40 | #endif |
40 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) |
41 | #ifdef HAVE_STROPTS_H |
41 | # include <sys/stropts.h> /* for I_PUSH */ |
|
|
42 | #endif |
|
|
43 | #ifdef HAVE_ISASTREAM |
|
|
44 | # include <stropts.h> |
42 | # include <stropts.h> |
45 | #endif |
43 | #endif |
46 | #if defined(HAVE_PTY_H) |
44 | #if defined(HAVE_PTY_H) |
47 | # include <pty.h> |
45 | # include <pty.h> |
48 | #elif defined(HAVE_LIBUTIL_H) |
46 | #elif defined(HAVE_LIBUTIL_H) |
… | |
… | |
52 | #endif |
50 | #endif |
53 | #ifdef TTY_GID_SUPPORT |
51 | #ifdef TTY_GID_SUPPORT |
54 | #include <grp.h> |
52 | #include <grp.h> |
55 | #endif |
53 | #endif |
56 | |
54 | |
57 | #include <cstdio> |
55 | #ifndef O_NOCTTY |
|
|
56 | # define O_NOCTTY 0 |
|
|
57 | #endif |
58 | |
58 | |
59 | ///////////////////////////////////////////////////////////////////////////// |
59 | ///////////////////////////////////////////////////////////////////////////// |
60 | |
60 | |
61 | /* ------------------------------------------------------------------------- * |
61 | /* ------------------------------------------------------------------------- * |
62 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
62 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
63 | * ------------------------------------------------------------------------- */ |
63 | * ------------------------------------------------------------------------- */ |
64 | /* |
64 | /* |
65 | * Returns pty file descriptor, or -1 on failure |
65 | * Returns pty file descriptor, or -1 on failure |
66 | * 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. |
67 | * 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 |
68 | */ |
68 | */ |
69 | #if defined(UNIX98_PTY) |
69 | #if defined(UNIX98_PTY) |
|
|
70 | |
70 | static int |
71 | static int |
71 | get_pty (int *fd_tty, char **ttydev) |
72 | get_pty (int *fd_tty, char **ttydev) |
72 | { |
73 | { |
73 | int pfd; |
74 | int pfd; |
74 | |
75 | |
75 | # if defined(HAVE_GETPT) |
76 | # if defined(HAVE_GETPT) |
76 | pfd = getpt(); |
77 | pfd = getpt (); |
77 | # elif defined(HAVE_POSIX_OPENPT) |
78 | # elif defined(HAVE_POSIX_OPENPT) |
78 | pfd = posix_openpt (O_RDWR); |
79 | pfd = posix_openpt (O_RDWR | O_NOCTTY); |
79 | # else |
80 | # else |
|
|
81 | # ifdef _AIX |
80 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
82 | pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0); |
|
|
83 | # else |
|
|
84 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
|
|
85 | # endif |
81 | # endif |
86 | # endif |
|
|
87 | |
82 | if (pfd >= 0) |
88 | if (pfd >= 0) |
83 | { |
89 | { |
84 | if (grantpt (pfd) == 0 /* change slave permissions */ |
90 | if (grantpt (pfd) == 0 /* change slave permissions */ |
85 | && unlockpt (pfd) == 0) |
91 | && unlockpt (pfd) == 0) |
|
|
92 | { |
86 | { /* slave now unlocked */ |
93 | /* slave now unlocked */ |
87 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
94 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
88 | return pfd; |
95 | return pfd; |
89 | } |
96 | } |
90 | |
97 | |
91 | close (pfd); |
98 | close (pfd); |
92 | } |
99 | } |
93 | |
100 | |
94 | return -1; |
101 | return -1; |
95 | } |
102 | } |
|
|
103 | |
96 | #elif defined(HAVE_OPENPTY) |
104 | #elif defined(HAVE_OPENPTY) |
|
|
105 | |
97 | static int |
106 | static int |
98 | get_pty (int *fd_tty, char **ttydev) |
107 | get_pty (int *fd_tty, char **ttydev) |
99 | { |
108 | { |
100 | int pfd; |
109 | int pfd; |
101 | int res; |
110 | int res; |
102 | char tty_name[32]; |
111 | |
103 | |
|
|
104 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
112 | res = openpty (&pfd, fd_tty, NULL, NULL, NULL); |
|
|
113 | |
105 | if (res != -1) |
114 | if (res != -1) |
106 | { |
115 | { |
107 | *ttydev = strdup (tty_name); |
116 | *ttydev = strdup (ttyname (*fd_tty)); |
108 | return pfd; |
117 | return pfd; |
109 | } |
118 | } |
110 | |
119 | |
111 | return -1; |
120 | return -1; |
112 | } |
121 | } |
|
|
122 | |
113 | #elif defined(HAVE__GETPTY) |
123 | #elif defined(HAVE__GETPTY) |
|
|
124 | |
114 | static int |
125 | static int |
115 | get_pty (int *fd_tty, char **ttydev) |
126 | get_pty (int *fd_tty, char **ttydev) |
116 | { |
127 | { |
117 | int pfd; |
128 | int pfd; |
|
|
129 | char *slave; |
118 | |
130 | |
119 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
131 | slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0); |
120 | if (*ttydev != NULL) |
|
|
121 | return pfd; |
|
|
122 | |
132 | |
123 | return -1; |
133 | if (slave != NULL) |
124 | } |
|
|
125 | #elif defined(HAVE_DEV_PTC) |
|
|
126 | static int |
|
|
127 | get_pty (int *fd_tty, char **ttydev) |
|
|
128 | { |
|
|
129 | int pfd; |
|
|
130 | |
|
|
131 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
132 | { |
134 | { |
133 | *ttydev = strdup (ttyname (pfd)); |
135 | *ttydev = strdup (slave); |
134 | return pfd; |
136 | return pfd; |
135 | } |
137 | } |
136 | |
138 | |
137 | return -1; |
139 | return -1; |
138 | } |
|
|
139 | #elif defined(HAVE_DEV_CLONE) |
|
|
140 | static int |
|
|
141 | get_pty (int *fd_tty, char **ttydev) |
|
|
142 | { |
|
|
143 | int pfd; |
|
|
144 | |
|
|
145 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
146 | { |
|
|
147 | *ttydev = strdup (ptsname (pfd)); |
|
|
148 | return pfd; |
|
|
149 | } |
140 | } |
150 | |
141 | |
151 | return -1; |
|
|
152 | } |
|
|
153 | #else |
142 | #else |
|
|
143 | |
154 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
144 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
155 | static int |
145 | static int |
156 | get_pty (int *fd_tty, char **ttydev) |
146 | get_pty (int *fd_tty, char **ttydev) |
157 | { |
147 | { |
158 | int pfd; |
148 | int pfd; |
159 | int i; |
149 | int i; |
160 | char pty_name[32]; |
150 | char pty_name[32]; |
161 | char tty_name[32]; |
151 | char tty_name[32]; |
162 | const char *majors = "pqrstuvwxyzabcde"; |
152 | const char *majors = "pqrstuvwxyzabcde"; |
163 | const char *minors = "0123456789abcdef"; |
153 | const char *minors = "0123456789abcdef"; |
|
|
154 | |
164 | for (i = 0; i < 256; i++) |
155 | for (i = 0; i < 256; i++) |
165 | { |
156 | { |
166 | snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
157 | snprintf (pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
167 | snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
158 | snprintf (tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
|
|
159 | |
168 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
160 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
169 | { |
161 | { |
170 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
162 | snprintf (pty_name, 32, "/dev/ptyp%d", i); |
171 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
163 | snprintf (tty_name, 32, "/dev/ttyp%d", i); |
172 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
164 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
173 | continue; |
165 | continue; |
174 | } |
166 | } |
|
|
167 | |
175 | if (access (tty_name, R_OK | W_OK) == 0) |
168 | if (access (tty_name, R_OK | W_OK) == 0) |
176 | { |
169 | { |
177 | *ttydev = strdup (tty_name); |
170 | *ttydev = strdup (tty_name); |
178 | return pfd; |
171 | return pfd; |
179 | } |
172 | } |
180 | |
173 | |
181 | close (pfd); |
174 | close (pfd); |
182 | } |
175 | } |
183 | } |
176 | |
|
|
177 | return -1; |
|
|
178 | } |
|
|
179 | |
184 | #endif |
180 | #endif |
185 | |
181 | |
186 | /*----------------------------------------------------------------------*/ |
182 | /*----------------------------------------------------------------------*/ |
187 | /* |
183 | /* |
188 | * Returns tty file descriptor, or -1 on failure |
184 | * Returns tty file descriptor, or -1 on failure |
189 | */ |
185 | */ |
190 | static int |
186 | static int |
191 | get_tty (char *ttydev) |
187 | get_tty (char *ttydev) |
192 | { |
188 | { |
193 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
189 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
… | |
… | |
198 | * Make our tty a controlling tty so that /dev/tty points to us |
194 | * Make our tty a controlling tty so that /dev/tty points to us |
199 | */ |
195 | */ |
200 | static int |
196 | static int |
201 | control_tty (int fd_tty) |
197 | control_tty (int fd_tty) |
202 | { |
198 | { |
|
|
199 | int fd; |
|
|
200 | |
203 | setsid (); |
201 | setsid (); |
204 | |
202 | |
205 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
203 | #ifdef TIOCSCTTY |
|
|
204 | ioctl (fd_tty, TIOCSCTTY, NULL); |
|
|
205 | #else |
|
|
206 | fd = open (ttyname (fd_tty), O_RDWR); |
|
|
207 | if (fd >= 0) |
|
|
208 | close (fd); |
|
|
209 | #endif |
|
|
210 | |
|
|
211 | fd = open ("/dev/tty", O_WRONLY); |
|
|
212 | if (fd < 0) |
|
|
213 | return -1; /* fatal */ |
|
|
214 | |
|
|
215 | close (fd); |
|
|
216 | |
|
|
217 | return 0; |
|
|
218 | } |
|
|
219 | |
|
|
220 | void |
|
|
221 | ptytty::close_tty () |
|
|
222 | { |
|
|
223 | if (tty < 0) |
|
|
224 | return; |
|
|
225 | |
|
|
226 | close (tty); |
|
|
227 | tty = -1; |
|
|
228 | } |
|
|
229 | |
|
|
230 | bool |
|
|
231 | ptytty::make_controlling_tty () |
|
|
232 | { |
|
|
233 | return control_tty (tty) >= 0; |
|
|
234 | } |
|
|
235 | |
|
|
236 | void |
|
|
237 | ptytty::set_utf8_mode (bool on) |
|
|
238 | { |
|
|
239 | #ifdef IUTF8 |
|
|
240 | if (pty < 0) |
|
|
241 | return; |
|
|
242 | |
|
|
243 | struct termios tio; |
|
|
244 | |
|
|
245 | if (tcgetattr (pty, &tio) != -1) |
|
|
246 | { |
|
|
247 | tcflag_t new_cflag = tio.c_iflag; |
|
|
248 | |
|
|
249 | if (on) |
|
|
250 | new_cflag |= IUTF8; |
|
|
251 | else |
|
|
252 | new_cflag &= ~IUTF8; |
|
|
253 | |
|
|
254 | if (new_cflag != tio.c_iflag) |
|
|
255 | { |
|
|
256 | tio.c_iflag = new_cflag; |
|
|
257 | tcsetattr (pty, TCSANOW, &tio); |
|
|
258 | } |
|
|
259 | } |
|
|
260 | #endif |
|
|
261 | } |
|
|
262 | |
|
|
263 | static struct ttyconf { |
|
|
264 | gid_t gid; |
|
|
265 | mode_t mode; |
|
|
266 | |
|
|
267 | ttyconf () |
|
|
268 | { |
|
|
269 | #ifdef TTY_GID_SUPPORT |
|
|
270 | struct group *gr = getgrnam ("tty"); |
|
|
271 | |
|
|
272 | if (gr) |
|
|
273 | { |
|
|
274 | /* change group ownership of tty to "tty" */ |
|
|
275 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
|
|
276 | gid = gr->gr_gid; |
|
|
277 | } |
|
|
278 | else |
|
|
279 | #endif /* TTY_GID_SUPPORT */ |
|
|
280 | { |
|
|
281 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
|
|
282 | gid = 0; |
|
|
283 | } |
|
|
284 | } |
|
|
285 | } ttyconf; |
|
|
286 | |
|
|
287 | ptytty_unix::ptytty_unix () |
|
|
288 | { |
|
|
289 | name = 0; |
|
|
290 | #if UTMP_SUPPORT |
|
|
291 | cmd_pid = 0; |
|
|
292 | #endif |
|
|
293 | } |
|
|
294 | |
|
|
295 | ptytty_unix::~ptytty_unix () |
|
|
296 | { |
|
|
297 | #if UTMP_SUPPORT |
|
|
298 | logout (); |
|
|
299 | #endif |
|
|
300 | put (); |
|
|
301 | } |
|
|
302 | |
|
|
303 | void |
|
|
304 | ptytty_unix::put () |
|
|
305 | { |
|
|
306 | if (name) |
|
|
307 | { |
|
|
308 | chmod (name, RESTORE_TTY_MODE); |
|
|
309 | chown (name, 0, ttyconf.gid); |
|
|
310 | } |
|
|
311 | |
|
|
312 | close_tty (); |
|
|
313 | |
|
|
314 | if (pty >= 0) |
|
|
315 | close (pty); |
|
|
316 | |
|
|
317 | free (name); |
|
|
318 | |
|
|
319 | pty = tty = -1; |
|
|
320 | name = 0; |
|
|
321 | } |
|
|
322 | |
|
|
323 | bool |
|
|
324 | ptytty_unix::get () |
|
|
325 | { |
|
|
326 | /* get master (pty) */ |
|
|
327 | if ((pty = get_pty (&tty, &name)) < 0) |
|
|
328 | return false; |
|
|
329 | |
|
|
330 | /* get slave (tty) */ |
|
|
331 | if (tty < 0) |
|
|
332 | { |
|
|
333 | #ifndef NO_SETOWNER_TTYDEV |
|
|
334 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
335 | chmod (name, ttyconf.mode); |
|
|
336 | # ifdef HAVE_REVOKE |
|
|
337 | revoke (name); |
|
|
338 | # endif |
|
|
339 | #endif |
|
|
340 | |
|
|
341 | if ((tty = get_tty (name)) < 0) |
|
|
342 | { |
|
|
343 | put (); |
|
|
344 | return false; |
|
|
345 | } |
|
|
346 | } |
|
|
347 | |
|
|
348 | #if defined(I_PUSH) |
206 | /* |
349 | /* |
207 | * Push STREAMS modules: |
350 | * Push STREAMS modules: |
208 | * ptem: pseudo-terminal hardware emulation module. |
351 | * ptem: pseudo-terminal hardware emulation module. |
209 | * ldterm: standard terminal line discipline. |
352 | * ldterm: standard terminal line discipline. |
210 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
353 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
211 | * |
354 | * |
212 | * After we push the STREAMS modules, the first open () on the slave side |
355 | * After we push the STREAMS modules, the first open () on the slave side |
213 | * (i.e. the next section between the dashes giving us "tty opened OK") |
|
|
214 | * should make the "ptem" (or "ldterm" depending upon either which OS |
356 | * should make the "ptem" (or "ldterm" depending upon either which OS |
215 | * version or which set of manual pages you have) module give us a |
357 | * version or which set of manual pages you have) module give us a |
216 | * controlling terminal. We must already have close ()d the master side |
358 | * controlling terminal. We must already have close ()d the master side |
217 | * fd in this child process before we push STREAMS modules on because the |
359 | * fd in this child process before we push STREAMS modules on because the |
218 | * documentation is really unclear about whether it is any close () on |
360 | * documentation is really unclear about whether it is any close () on |
219 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
361 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
220 | * close () - on the master side which causes a hang up to be sent |
362 | * close () - on the master side which causes a hang up to be sent |
221 | * through - Geoff Wing |
363 | * through - Geoff Wing |
222 | */ |
364 | */ |
223 | # ifdef HAVE_ISASTREAM |
365 | #if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H) |
224 | if (isastream (fd_tty) == 1) |
366 | if (isastream (tty) == 1) |
225 | # endif |
367 | # endif |
226 | { |
368 | { |
227 | ioctl (fd_tty, I_PUSH, "ptem"); |
369 | ioctl (tty, I_PUSH, "ptem"); |
228 | ioctl (fd_tty, I_PUSH, "ldterm"); |
370 | ioctl (tty, I_PUSH, "ldterm"); |
229 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
371 | ioctl (tty, I_PUSH, "ttcompat"); |
230 | } |
|
|
231 | #endif |
|
|
232 | |
|
|
233 | ioctl (fd_tty, TIOCSCTTY, NULL); |
|
|
234 | |
|
|
235 | int fd = open ("/dev/tty", O_WRONLY); |
|
|
236 | if (fd < 0) |
|
|
237 | return -1; /* fatal */ |
|
|
238 | |
|
|
239 | close (fd); |
|
|
240 | |
|
|
241 | return 0; |
|
|
242 | } |
|
|
243 | |
|
|
244 | void |
|
|
245 | ptytty::close_tty () |
|
|
246 | { |
|
|
247 | if (tty < 0) |
|
|
248 | return; |
|
|
249 | |
|
|
250 | close (tty); |
|
|
251 | tty = -1; |
|
|
252 | } |
|
|
253 | |
|
|
254 | bool |
|
|
255 | ptytty::make_controlling_tty () |
|
|
256 | { |
|
|
257 | return control_tty (tty) >= 0; |
|
|
258 | } |
|
|
259 | |
|
|
260 | void |
|
|
261 | ptytty::set_utf8_mode (bool on) |
|
|
262 | { |
|
|
263 | #ifdef IUTF8 |
|
|
264 | if (pty < 0) |
|
|
265 | return; |
|
|
266 | |
|
|
267 | struct termios tio; |
|
|
268 | |
|
|
269 | if (tcgetattr (pty, &tio) != -1) |
|
|
270 | { |
372 | } |
271 | tcflag_t new_cflag = tio.c_iflag; |
|
|
272 | |
|
|
273 | if (on) |
|
|
274 | new_cflag |= IUTF8; |
|
|
275 | else |
|
|
276 | new_cflag &= ~IUTF8; |
|
|
277 | |
|
|
278 | if (new_cflag != tio.c_iflag) |
|
|
279 | { |
|
|
280 | tio.c_iflag = new_cflag; |
|
|
281 | tcsetattr (pty, TCSANOW, &tio); |
|
|
282 | } |
|
|
283 | } |
|
|
284 | #endif |
373 | #endif |
285 | } |
|
|
286 | |
374 | |
287 | static struct ttyconf { |
|
|
288 | gid_t gid; |
|
|
289 | mode_t mode; |
|
|
290 | |
|
|
291 | ttyconf () |
|
|
292 | { |
|
|
293 | #ifdef TTY_GID_SUPPORT |
|
|
294 | struct group *gr = getgrnam ("tty"); |
|
|
295 | |
|
|
296 | if (gr) |
|
|
297 | { /* change group ownership of tty to "tty" */ |
|
|
298 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
|
|
299 | gid = gr->gr_gid; |
|
|
300 | } |
|
|
301 | else |
|
|
302 | #endif /* TTY_GID_SUPPORT */ |
|
|
303 | { |
|
|
304 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
|
|
305 | gid = 0; |
|
|
306 | } |
|
|
307 | } |
|
|
308 | } ttyconf; |
|
|
309 | |
|
|
310 | ptytty_unix::ptytty_unix () |
|
|
311 | { |
|
|
312 | name = 0; |
|
|
313 | #if UTMP_SUPPORT |
375 | #if UTMP_SUPPORT |
314 | cmd_pid = 0; |
376 | # if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID) |
315 | #endif |
377 | int fd_stdin = dup (STDIN_FILENO); |
316 | } |
378 | dup2 (tty, STDIN_FILENO); |
317 | |
379 | |
318 | ptytty_unix::~ptytty_unix () |
380 | utmp_pos = ttyslot (); |
319 | { |
|
|
320 | #if UTMP_SUPPORT |
|
|
321 | logout (); |
|
|
322 | #endif |
|
|
323 | put (); |
|
|
324 | } |
|
|
325 | |
381 | |
326 | void |
382 | dup2 (fd_stdin, STDIN_FILENO); |
327 | ptytty_unix::put () |
383 | close (fd_stdin); |
328 | { |
|
|
329 | chmod (name, RESTORE_TTY_MODE); |
|
|
330 | chown (name, 0, ttyconf.gid); |
|
|
331 | |
|
|
332 | close_tty (); |
|
|
333 | |
|
|
334 | if (pty >= 0) |
|
|
335 | close (pty); |
|
|
336 | |
|
|
337 | free (name); |
|
|
338 | |
|
|
339 | pty = tty = -1; |
|
|
340 | name = 0; |
|
|
341 | } |
|
|
342 | |
|
|
343 | bool |
|
|
344 | ptytty_unix::get () |
|
|
345 | { |
|
|
346 | /* get master (pty) */ |
|
|
347 | if ((pty = get_pty (&tty, &name)) < 0) |
|
|
348 | return false; |
|
|
349 | |
|
|
350 | fcntl (pty, F_SETFL, O_NONBLOCK); |
|
|
351 | |
|
|
352 | /* get slave (tty) */ |
|
|
353 | if (tty < 0) |
|
|
354 | { |
|
|
355 | #ifndef NO_SETOWNER_TTYDEV |
|
|
356 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
357 | chmod (name, ttyconf.mode); |
|
|
358 | # ifdef HAVE_REVOKE |
|
|
359 | revoke (name); |
|
|
360 | # endif |
384 | # endif |
361 | #endif |
385 | #endif |
362 | |
386 | |
363 | if ((tty = get_tty (name)) < 0) |
|
|
364 | { |
|
|
365 | put (); |
|
|
366 | return false; |
|
|
367 | } |
|
|
368 | } |
|
|
369 | |
|
|
370 | return true; |
387 | return true; |
371 | } |
388 | } |
372 | |
389 | |
373 | #if PTYTTY_HELPER |
|
|
374 | |
|
|
375 | static int sock_fd; |
|
|
376 | static int pid; |
|
|
377 | |
|
|
378 | struct command |
|
|
379 | { |
|
|
380 | enum { get, login, destroy } type; |
|
|
381 | |
|
|
382 | ptytty *id; |
|
|
383 | |
|
|
384 | bool login_shell; |
|
|
385 | int cmd_pid; |
|
|
386 | char hostname[512]; // arbitrary, but should be plenty |
|
|
387 | }; |
|
|
388 | |
|
|
389 | struct ptytty_proxy : ptytty |
|
|
390 | { |
|
|
391 | ptytty *id; |
|
|
392 | |
|
|
393 | ptytty_proxy () |
|
|
394 | : id(0) |
|
|
395 | { |
|
|
396 | } |
|
|
397 | |
|
|
398 | ~ptytty_proxy (); |
|
|
399 | |
|
|
400 | bool get (); |
|
|
401 | void login (int cmd_pid, bool login_shell, const char *hostname); |
|
|
402 | }; |
|
|
403 | |
|
|
404 | bool |
|
|
405 | ptytty_proxy::get () |
|
|
406 | { |
|
|
407 | command cmd; |
|
|
408 | |
|
|
409 | cmd.type = command::get; |
|
|
410 | |
|
|
411 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
412 | |
|
|
413 | if (read (sock_fd, &id, sizeof (id)) != sizeof (id)) |
|
|
414 | fatal ("protocol error while creating pty using helper process, aborting.\n"); |
|
|
415 | |
|
|
416 | if (!id) |
|
|
417 | return false; |
|
|
418 | |
|
|
419 | if ((pty = ptytty_recv_fd (sock_fd)) < 0 |
|
|
420 | || (tty = ptytty_recv_fd (sock_fd)) < 0) |
|
|
421 | fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n"); |
|
|
422 | |
|
|
423 | return true; |
|
|
424 | } |
|
|
425 | |
|
|
426 | void |
|
|
427 | ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
|
|
428 | { |
|
|
429 | command cmd; |
|
|
430 | |
|
|
431 | cmd.type = command::login; |
|
|
432 | cmd.id = id; |
|
|
433 | cmd.cmd_pid = cmd_pid; |
|
|
434 | cmd.login_shell = login_shell; |
|
|
435 | strncpy (cmd.hostname, hostname, sizeof (cmd.hostname)); |
|
|
436 | |
|
|
437 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
438 | } |
|
|
439 | |
|
|
440 | ptytty_proxy::~ptytty_proxy () |
|
|
441 | { |
|
|
442 | if (id) |
|
|
443 | { |
|
|
444 | command cmd; |
|
|
445 | |
|
|
446 | cmd.type = command::destroy; |
|
|
447 | cmd.id = id; |
|
|
448 | |
|
|
449 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
450 | } |
|
|
451 | } |
|
|
452 | |
|
|
453 | static |
|
|
454 | void serve () |
|
|
455 | { |
|
|
456 | command cmd; |
|
|
457 | vector<ptytty *> ptys; |
|
|
458 | |
|
|
459 | while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command)) |
|
|
460 | { |
|
|
461 | if (cmd.type == command::get) |
|
|
462 | { |
|
|
463 | // -> id ptyfd ttyfd |
|
|
464 | cmd.id = new ptytty_unix; |
|
|
465 | |
|
|
466 | if (cmd.id->get ()) |
|
|
467 | { |
|
|
468 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
469 | ptys.push_back (cmd.id); |
|
|
470 | |
|
|
471 | ptytty_send_fd (sock_fd, cmd.id->pty); |
|
|
472 | ptytty_send_fd (sock_fd, cmd.id->tty); |
|
|
473 | } |
|
|
474 | else |
|
|
475 | { |
|
|
476 | delete cmd.id; |
|
|
477 | cmd.id = 0; |
|
|
478 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
479 | } |
|
|
480 | } |
|
|
481 | else if (cmd.type == command::login) |
|
|
482 | { |
|
|
483 | #if UTMP_SUPPORT |
|
|
484 | if (find (ptys.begin (), ptys.end (), cmd.id)) |
|
|
485 | { |
|
|
486 | cmd.hostname[sizeof (cmd.hostname) - 1] = 0; |
|
|
487 | cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname); |
|
|
488 | } |
|
|
489 | #endif |
|
|
490 | } |
|
|
491 | else if (cmd.type == command::destroy) |
|
|
492 | { |
|
|
493 | ptytty **pty = find (ptys.begin (), ptys.end (), cmd.id); |
|
|
494 | |
|
|
495 | if (pty) |
|
|
496 | { |
|
|
497 | delete *pty; |
|
|
498 | ptys.erase (pty); |
|
|
499 | } |
|
|
500 | } |
|
|
501 | else |
|
|
502 | break; |
|
|
503 | } |
|
|
504 | |
|
|
505 | // destroy all ptys |
|
|
506 | for (ptytty **i = ptys.end (); i-- > ptys.begin (); ) |
|
|
507 | delete *i; |
|
|
508 | } |
|
|
509 | |
|
|
510 | void ptytty_server () |
|
|
511 | { |
|
|
512 | int sv[2]; |
|
|
513 | |
|
|
514 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
|
|
515 | fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
|
|
516 | |
|
|
517 | pid = fork (); |
|
|
518 | |
|
|
519 | if (pid < 0) |
|
|
520 | fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
|
|
521 | |
|
|
522 | if (pid) |
|
|
523 | { |
|
|
524 | // client, process |
|
|
525 | sock_fd = sv[0]; |
|
|
526 | close (sv[1]); |
|
|
527 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
|
|
528 | } |
|
|
529 | else |
|
|
530 | { |
|
|
531 | // server, pty-helper |
|
|
532 | sock_fd = sv[1]; |
|
|
533 | |
|
|
534 | for (int fd = 0; fd < 1023; fd++) |
|
|
535 | if (fd != sock_fd) |
|
|
536 | close (fd); |
|
|
537 | |
|
|
538 | serve (); |
|
|
539 | _exit (EXIT_SUCCESS); |
|
|
540 | } |
|
|
541 | } |
|
|
542 | |
|
|
543 | #endif |
|
|
544 | |
|
|
545 | // a "factory" *g* |
|
|
546 | ptytty * |
|
|
547 | new_ptytty () |
|
|
548 | { |
|
|
549 | #if PTYTTY_HELPER |
|
|
550 | if (pid > 0) |
|
|
551 | // use helper process |
|
|
552 | return new ptytty_proxy; |
|
|
553 | else |
|
|
554 | #endif |
|
|
555 | return new ptytty_unix; |
|
|
556 | } |
|
|
557 | |
|
|
558 | /*----------------------- end-of-file (C source) -----------------------*/ |
|
|
559 | |
|
|