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> |
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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 */ |
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25 | #include "rxvt.h" |
24 | |
26 | |
25 | /* |
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26 | * Try to be self-contained except for the above autoconfig'd defines |
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27 | */ |
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28 | |
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29 | #if 0 |
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30 | #ifdef HAVE_GETPT |
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31 | # define _GNU_SOURCE |
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32 | #endif |
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33 | #endif |
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34 | |
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35 | #include <cstdio> |
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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 | #ifdef HAVE_ISASTREAM |
48 | #ifdef HAVE_ISASTREAM |
58 | # include <stropts.h> |
49 | # include <stropts.h> |
59 | #endif |
50 | #endif |
60 | |
51 | |
61 | #ifdef DEBUG_TTY |
52 | #if defined( __FreeBSD__) |
62 | # define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) |
53 | // better do this via configure, but.... |
63 | #else |
54 | # include <libutil.h> |
64 | # define D_TTY(x) |
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65 | #endif |
55 | #endif |
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56 | |
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57 | #include <cstdio> |
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58 | #include <grp.h> |
66 | |
59 | |
67 | /* ------------------------------------------------------------------------- * |
60 | /* ------------------------------------------------------------------------- * |
68 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
61 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
69 | * ------------------------------------------------------------------------- */ |
62 | * ------------------------------------------------------------------------- */ |
70 | /* |
63 | /* |
71 | * Returns pty file descriptor, or -1 on failure |
64 | * Returns pty file descriptor, or -1 on failure |
72 | * If successful, ttydev is set to the name of the slave device. |
65 | * If successful, ttydev is set to the name of the slave device. |
73 | * fd_tty _may_ also be set to an open fd to the slave device |
66 | * fd_tty _may_ also be set to an open fd to the slave device |
74 | */ |
67 | */ |
75 | /* EXTPROTO */ |
68 | static int |
76 | int |
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77 | rxvt_get_pty (int *fd_tty, const char **ttydev) |
69 | get_pty (int *fd_tty, char **ttydev) |
78 | { |
70 | { |
79 | int pfd; |
71 | int pfd; |
80 | |
72 | |
81 | #ifdef PTYS_ARE_OPENPTY |
73 | #ifdef PTYS_ARE_OPENPTY |
82 | |
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83 | char tty_name[sizeof "/dev/pts/????\0"]; |
74 | char tty_name[sizeof "/dev/pts/????\0"]; |
84 | |
75 | |
85 | if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) |
76 | if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) |
86 | { |
77 | { |
87 | *ttydev = strdup (tty_name); |
78 | *ttydev = strdup (tty_name); |
… | |
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112 | |
103 | |
113 | { |
104 | { |
114 | # ifdef PTYS_ARE_GETPT |
105 | # ifdef PTYS_ARE_GETPT |
115 | pfd = getpt (); |
106 | pfd = getpt (); |
116 | # else |
107 | # else |
117 | |
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118 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
108 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
119 | # endif |
109 | # endif |
120 | |
110 | |
121 | if (pfd >= 0) |
111 | if (pfd >= 0) |
122 | { |
112 | { |
123 | if (grantpt (pfd) == 0 /* change slave permissions */ |
113 | if (grantpt (pfd) == 0 /* change slave permissions */ |
124 | && unlockpt (pfd) == 0) |
114 | && unlockpt (pfd) == 0) |
125 | { /* slave now unlocked */ |
115 | { /* slave now unlocked */ |
126 | *ttydev = ptsname (pfd); /* get slave's name */ |
116 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
127 | return pfd; |
117 | return pfd; |
128 | } |
118 | } |
129 | close (pfd); |
119 | close (pfd); |
130 | } |
120 | } |
131 | } |
121 | } |
… | |
… | |
133 | #endif |
123 | #endif |
134 | |
124 | |
135 | #ifdef PTYS_ARE_PTC |
125 | #ifdef PTYS_ARE_PTC |
136 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
126 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
137 | { |
127 | { |
138 | *ttydev = ttyname (pfd); |
128 | *ttydev = strdup (ttyname (pfd)); |
139 | return pfd; |
129 | return pfd; |
140 | } |
130 | } |
141 | #endif |
131 | #endif |
142 | |
132 | |
143 | #ifdef PTYS_ARE_CLONE |
133 | #ifdef PTYS_ARE_CLONE |
144 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
134 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
145 | { |
135 | { |
146 | *ttydev = ptsname (pfd); |
136 | *ttydev = strdup (ptsname (pfd)); |
147 | return pfd; |
137 | return pfd; |
148 | } |
138 | } |
149 | #endif |
139 | #endif |
150 | |
140 | |
151 | #ifdef PTYS_ARE_NUMERIC |
141 | #ifdef PTYS_ARE_NUMERIC |
152 | { |
142 | { |
153 | int idx; |
143 | int idx; |
154 | char *c1, *c2; |
144 | char *c1, *c2; |
155 | char pty_name[] = "/dev/ptyp???"; |
145 | char pty_name[] = "/dev/ptyp???"; |
156 | char tty_name[] = "/dev/ttyp???"; |
146 | char tty_name[] = "/dev/ttyp???"; |
157 | |
147 | |
158 | c1 = & (pty_name[sizeof (pty_name) - 4]); |
148 | c1 = &(pty_name[sizeof (pty_name) - 4]); |
159 | c2 = & (tty_name[sizeof (tty_name) - 4]); |
149 | c2 = &(tty_name[sizeof (tty_name) - 4]); |
160 | for (idx = 0; idx < 256; idx++) |
150 | for (idx = 0; idx < 256; idx++) |
161 | { |
151 | { |
162 | sprintf (c1, "%d", idx); |
152 | sprintf (c1, "%d", idx); |
163 | sprintf (c2, "%d", idx); |
153 | sprintf (c2, "%d", idx); |
164 | if (access (tty_name, F_OK) < 0) |
154 | if (access (tty_name, F_OK) < 0) |
165 | { |
155 | { |
166 | idx = 256; |
156 | idx = 256; |
167 | break; |
157 | break; |
168 | } |
158 | } |
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159 | |
169 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
160 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
170 | { |
161 | { |
171 | if (access (tty_name, R_OK | W_OK) == 0) |
162 | if (access (tty_name, R_OK | W_OK) == 0) |
172 | { |
163 | { |
173 | *ttydev = strdup (tty_name); |
164 | *ttydev = strdup (tty_name); |
174 | return pfd; |
165 | return pfd; |
175 | } |
166 | } |
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167 | |
176 | close (pfd); |
168 | close (pfd); |
177 | } |
169 | } |
178 | } |
170 | } |
179 | } |
171 | } |
180 | #endif |
172 | #endif |
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173 | |
181 | #ifdef PTYS_ARE_SEARCHED |
174 | #ifdef PTYS_ARE_SEARCHED |
182 | { |
175 | { |
183 | const char *c1, *c2; |
176 | const char *c1, *c2; |
184 | char pty_name[] = "/dev/pty??"; |
177 | char pty_name[] = "/dev/pty??"; |
185 | char tty_name[] = "/dev/tty??"; |
178 | char tty_name[] = "/dev/tty??"; |
186 | |
179 | |
187 | # ifndef PTYCHAR1 |
180 | # ifndef PTYCHAR1 |
188 | # define PTYCHAR1 "pqrstuvwxyz" |
181 | # define PTYCHAR1 "pqrstuvwxyz" |
189 | # endif |
182 | # endif |
190 | # ifndef PTYCHAR2 |
183 | # ifndef PTYCHAR2 |
… | |
… | |
204 | if (access (tty_name, R_OK | W_OK) == 0) |
197 | if (access (tty_name, R_OK | W_OK) == 0) |
205 | { |
198 | { |
206 | *ttydev = strdup (tty_name); |
199 | *ttydev = strdup (tty_name); |
207 | return pfd; |
200 | return pfd; |
208 | } |
201 | } |
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202 | |
209 | close (pfd); |
203 | close (pfd); |
210 | } |
204 | } |
211 | } |
205 | } |
212 | } |
206 | } |
213 | } |
207 | } |
214 | #endif |
208 | #endif |
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209 | |
215 | return -1; |
210 | return -1; |
216 | } |
211 | } |
217 | |
212 | |
218 | /*----------------------------------------------------------------------*/ |
213 | /*----------------------------------------------------------------------*/ |
219 | /* |
214 | /* |
220 | * Returns tty file descriptor, or -1 on failure |
215 | * Returns tty file descriptor, or -1 on failure |
221 | */ |
216 | */ |
222 | /* EXTPROTO */ |
217 | static int |
223 | int |
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224 | rxvt_get_tty (const char *ttydev) |
218 | get_tty (char *ttydev) |
225 | { |
219 | { |
226 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
220 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
227 | } |
221 | } |
228 | |
222 | |
229 | /*----------------------------------------------------------------------*/ |
223 | /*----------------------------------------------------------------------*/ |
230 | /* |
224 | /* |
231 | * Make our tty a controlling tty so that /dev/tty points to us |
225 | * Make our tty a controlling tty so that /dev/tty points to us |
232 | */ |
226 | */ |
233 | /* EXTPROTO */ |
227 | static int |
234 | int |
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235 | rxvt_control_tty (int fd_tty, const char *ttydev) |
228 | control_tty (int fd_tty, const char *ttydev) |
236 | { |
229 | { |
237 | #ifndef __QNX__ |
230 | #ifndef __QNX__ |
238 | int fd; |
231 | int fd; |
239 | |
232 | |
240 | D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev)); |
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241 | /* ---------------------------------------- */ |
233 | /* ---------------------------------------- */ |
242 | # ifdef HAVE_SETSID |
234 | # ifdef HAVE_SETSID |
243 | setsid (); |
235 | setsid (); |
244 | # endif |
236 | # endif |
245 | # if defined(HAVE_SETPGID) |
237 | # if defined(HAVE_SETPGID) |
246 | setpgid (0, 0); |
238 | setpgid (0, 0); |
247 | # elif defined(HAVE_SETPGRP) |
239 | # elif defined(HAVE_SETPGRP) |
248 | setpgrp (0, 0); |
240 | setpgrp (0, 0); |
249 | # endif |
241 | # endif |
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242 | |
250 | /* ---------------------------------------- */ |
243 | /* ---------------------------------------- */ |
251 | # ifdef TIOCNOTTY |
244 | # ifdef TIOCNOTTY |
252 | |
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253 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
245 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
254 | D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); |
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255 | if (fd >= 0) |
246 | if (fd >= 0) |
256 | { |
247 | { |
257 | ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ |
248 | ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ |
258 | close (fd); |
249 | close (fd); |
259 | } |
250 | } |
260 | # endif |
251 | # endif |
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252 | |
261 | /* ---------------------------------------- */ |
253 | /* ---------------------------------------- */ |
262 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
254 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
263 | D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)")); |
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264 | if (fd >= 0) |
255 | if (fd >= 0) |
265 | close (fd); /* ouch: still have controlling tty */ |
256 | close (fd); /* ouch: still have controlling tty */ |
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257 | |
266 | /* ---------------------------------------- */ |
258 | /* ---------------------------------------- */ |
267 | #if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
259 | #if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
268 | /* |
260 | /* |
269 | * Push STREAMS modules: |
261 | * Push STREAMS modules: |
270 | * ptem: pseudo-terminal hardware emulation module. |
262 | * ptem: pseudo-terminal hardware emulation module. |
… | |
… | |
284 | */ |
276 | */ |
285 | # ifdef HAVE_ISASTREAM |
277 | # ifdef HAVE_ISASTREAM |
286 | if (isastream (fd_tty) == 1) |
278 | if (isastream (fd_tty) == 1) |
287 | # endif |
279 | # endif |
288 | { |
280 | { |
289 | D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules")); |
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290 | ioctl (fd_tty, I_PUSH, "ptem"); |
281 | ioctl (fd_tty, I_PUSH, "ptem"); |
291 | ioctl (fd_tty, I_PUSH, "ldterm"); |
282 | ioctl (fd_tty, I_PUSH, "ldterm"); |
292 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
283 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
293 | } |
284 | } |
294 | #endif |
285 | #endif |
295 | /* ---------------------------------------- */ |
286 | /* ---------------------------------------- */ |
296 | # if defined(TIOCSCTTY) |
287 | # if defined(TIOCSCTTY) |
297 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
288 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
298 | D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); |
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299 | # elif defined(TIOCSETCTTY) |
289 | # elif defined(TIOCSETCTTY) |
300 | fd = ioctl (fd_tty, TIOCSETCTTY, NULL); |
290 | fd = ioctl (fd_tty, TIOCSETCTTY, NULL); |
301 | D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd)); |
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302 | # else |
291 | # else |
303 | fd = open (ttydev, O_RDWR); |
292 | fd = open (ttydev, O_RDWR); |
304 | D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK")); |
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305 | if (fd >= 0) |
293 | if (fd >= 0) |
306 | close (fd); |
294 | close (fd); |
307 | # endif |
295 | # endif |
308 | /* ---------------------------------------- */ |
296 | /* ---------------------------------------- */ |
309 | fd = open ("/dev/tty", O_WRONLY); |
297 | fd = open ("/dev/tty", O_WRONLY); |
310 | D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)")); |
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311 | if (fd < 0) |
298 | if (fd < 0) |
312 | return -1; /* fatal */ |
299 | return -1; /* fatal */ |
313 | close (fd); |
300 | close (fd); |
314 | /* ---------------------------------------- */ |
301 | /* ---------------------------------------- */ |
315 | D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ())); |
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316 | /* ---------------------------------------- */ |
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317 | #endif /* ! __QNX__ */ |
302 | #endif /* ! __QNX__ */ |
318 | |
303 | |
319 | return 0; |
304 | return 0; |
320 | } |
305 | } |
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306 | |
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307 | #ifndef NO_SETOWNER_TTYDEV |
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308 | static struct ttyconf { |
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309 | gid_t gid; |
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310 | mode_t mode; |
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311 | |
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312 | ttyconf () |
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313 | { |
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314 | #ifdef TTY_GID_SUPPORT |
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315 | struct group *gr = getgrnam ("tty"); |
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316 | |
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317 | if (gr) |
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318 | { /* change group ownership of tty to "tty" */ |
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319 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
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320 | gid = gr->gr_gid; |
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321 | } |
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322 | else |
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323 | #endif /* TTY_GID_SUPPORT */ |
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324 | { |
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325 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
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326 | gid = getgid (); |
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327 | } |
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328 | } |
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329 | } ttyconf; |
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330 | |
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331 | void |
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332 | rxvt_ptytty::privileges (rxvt_privaction action) |
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333 | { |
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334 | rxvt_privileges (RESTORE); |
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335 | |
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336 | if (action == SAVE) |
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337 | { |
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338 | //next_tty_action = RESTORE; |
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339 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
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340 | /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
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341 | if (lstat (name, &savestat) < 0) /* you lose out */ |
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342 | ;//next_tty_action = IGNORE; |
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343 | else |
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344 | # endif |
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345 | |
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346 | { |
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347 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
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348 | chmod (name, ttyconf.mode); |
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349 | # ifdef HAVE_REVOKE |
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350 | revoke (name); |
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351 | # endif |
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352 | |
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353 | } |
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354 | } |
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355 | else |
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356 | { /* action == RESTORE */ |
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357 | //next_tty_action = IGNORE; |
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358 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
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359 | chmod (name, savestat.st_mode); |
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360 | chown (name, savestat.st_uid, savestat.st_gid); |
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361 | # else |
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362 | chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
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363 | chown (name, 0, 0); |
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364 | # endif |
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365 | |
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366 | } |
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367 | |
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368 | rxvt_privileges (IGNORE); |
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369 | } |
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370 | #endif |
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371 | |
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372 | rxvt_ptytty::rxvt_ptytty () |
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373 | { |
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374 | pty = tty = -1; |
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375 | name = 0; |
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376 | } |
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377 | |
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378 | rxvt_ptytty::~rxvt_ptytty () |
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379 | { |
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380 | put (); |
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381 | } |
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382 | |
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383 | void |
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384 | |
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385 | rxvt_ptytty::close_tty () |
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386 | { |
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387 | if (tty >= 0) close (tty); |
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388 | tty = -1; |
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389 | } |
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390 | |
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391 | void |
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392 | rxvt_ptytty::put () |
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393 | { |
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394 | #ifndef NO_SETOWNER_TTYDEV |
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395 | if (tty >= 0) |
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396 | privileges (RESTORE); |
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397 | #endif |
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398 | |
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399 | if (pty >= 0) close (pty); |
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400 | close_tty (); |
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401 | free (name); |
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402 | |
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403 | pty = tty = -1; |
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404 | name = 0; |
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405 | } |
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406 | |
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407 | bool |
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408 | rxvt_ptytty::make_controlling_tty () |
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409 | { |
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410 | return control_tty (tty, name) >= 0; |
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411 | } |
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412 | |
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413 | bool |
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414 | rxvt_ptytty::get () |
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415 | { |
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416 | /* get master (pty) */ |
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417 | if ((pty = get_pty (&tty, &name)) < 0) |
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418 | return false; |
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419 | |
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420 | fcntl (pty, F_SETFL, O_NONBLOCK); |
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421 | |
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422 | /* get slave (tty) */ |
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423 | if (tty < 0) |
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424 | { |
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425 | #ifndef NO_SETOWNER_TTYDEV |
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426 | privileges (SAVE); |
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427 | #endif |
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428 | |
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429 | if ((tty = get_tty (name)) < 0) |
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430 | { |
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431 | put (); |
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432 | return false; |
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433 | } |
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434 | } |
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435 | |
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436 | return true; |
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437 | } |
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438 | |
321 | /*----------------------- end-of-file (C source) -----------------------*/ |
439 | /*----------------------- end-of-file (C source) -----------------------*/ |
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440 | |