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 | #include <stdio.h> |
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30 | #ifdef HAVE_STDLIB_H |
27 | #ifdef HAVE_STDLIB_H |
31 | # include <stdlib.h> |
28 | # include <cstdlib> |
32 | #endif |
29 | #endif |
33 | #ifdef HAVE_SYS_TYPES_H |
30 | #ifdef HAVE_SYS_TYPES_H |
34 | # include <sys/types.h> |
31 | # include <sys/types.h> |
35 | #endif |
32 | #endif |
36 | #ifdef HAVE_UNISTD_H |
33 | #ifdef HAVE_UNISTD_H |
37 | # include <unistd.h> |
34 | # include <unistd.h> |
38 | #endif |
35 | #endif |
39 | #if defined(HAVE_STRING_H) |
36 | #if defined(HAVE_STRING_H) |
40 | # include <string.h> |
37 | # include <cstring> |
41 | #endif |
38 | #endif |
42 | #ifdef HAVE_FCNTL_H |
39 | #ifdef HAVE_FCNTL_H |
43 | # include <fcntl.h> |
40 | # include <fcntl.h> |
44 | #endif |
41 | #endif |
45 | #ifdef HAVE_SYS_IOCTL_H |
42 | #ifdef HAVE_SYS_IOCTL_H |
46 | # include <sys/ioctl.h> |
43 | # include <sys/ioctl.h> |
47 | #endif |
44 | #endif |
48 | #if defined(PTYS_ARE_PTMX) && !defined(__CYGWIN32__) |
45 | #if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) |
49 | # include <sys/stropts.h> /* for I_PUSH */ |
46 | # include <sys/stropts.h> /* for I_PUSH */ |
50 | #endif |
47 | #endif |
51 | |
48 | #ifdef HAVE_ISASTREAM |
52 | #ifdef DEBUG_TTY |
49 | # include <stropts.h> |
53 | # define D_TTY(x) fprintf x ; fputc('\n', stderr) ; fflush(stderr) |
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54 | #else |
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55 | # define D_TTY(x) |
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56 | #endif |
50 | #endif |
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51 | |
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52 | // better do this via configure, but.... |
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53 | #if defined(__FreeBSD__) |
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54 | # include <libutil.h> |
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55 | #elif defined(__DARWIN__) |
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56 | # include <util.h> |
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57 | #endif |
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58 | |
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59 | #include <cstdio> |
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60 | #include <grp.h> |
57 | |
61 | |
58 | /* ------------------------------------------------------------------------- * |
62 | /* ------------------------------------------------------------------------- * |
59 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
63 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
60 | * ------------------------------------------------------------------------- */ |
64 | * ------------------------------------------------------------------------- */ |
61 | /* |
65 | /* |
62 | * Returns pty file descriptor, or -1 on failure |
66 | * Returns pty file descriptor, or -1 on failure |
63 | * If successful, ttydev is set to the name of the slave device. |
67 | * If successful, ttydev is set to the name of the slave device. |
64 | * fd_tty _may_ also be set to an open fd to the slave device |
68 | * fd_tty _may_ also be set to an open fd to the slave device |
65 | */ |
69 | */ |
66 | /* EXTPROTO */ |
70 | static int |
67 | int |
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68 | rxvt_get_pty (int *fd_tty, const char **ttydev) |
71 | get_pty (int *fd_tty, char **ttydev) |
69 | { |
72 | { |
70 | int pfd; |
73 | int pfd; |
71 | |
74 | |
72 | #ifdef PTYS_ARE_OPENPTY |
75 | #ifdef PTYS_ARE_OPENPTY |
73 | |
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74 | char tty_name[sizeof "/dev/pts/????\0"]; |
76 | char tty_name[sizeof "/dev/pts/????\0"]; |
75 | |
77 | |
76 | if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) |
78 | if (openpty (&pfd, fd_tty, tty_name, NULL, NULL) != -1) |
77 | { |
79 | { |
78 | *ttydev = strdup (tty_name); |
80 | *ttydev = strdup (tty_name); |
… | |
… | |
103 | |
105 | |
104 | { |
106 | { |
105 | # ifdef PTYS_ARE_GETPT |
107 | # ifdef PTYS_ARE_GETPT |
106 | pfd = getpt (); |
108 | pfd = getpt (); |
107 | # else |
109 | # else |
108 | |
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109 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
110 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
110 | # endif |
111 | # endif |
111 | |
112 | |
112 | if (pfd >= 0) |
113 | if (pfd >= 0) |
113 | { |
114 | { |
114 | if (grantpt (pfd) == 0 /* change slave permissions */ |
115 | if (grantpt (pfd) == 0 /* change slave permissions */ |
115 | && unlockpt (pfd) == 0) |
116 | && unlockpt (pfd) == 0) |
116 | { /* slave now unlocked */ |
117 | { /* slave now unlocked */ |
117 | *ttydev = ptsname (pfd); /* get slave's name */ |
118 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
118 | return pfd; |
119 | return pfd; |
119 | } |
120 | } |
120 | close (pfd); |
121 | close (pfd); |
121 | } |
122 | } |
122 | } |
123 | } |
… | |
… | |
124 | #endif |
125 | #endif |
125 | |
126 | |
126 | #ifdef PTYS_ARE_PTC |
127 | #ifdef PTYS_ARE_PTC |
127 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
128 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
128 | { |
129 | { |
129 | *ttydev = ttyname (pfd); |
130 | *ttydev = strdup (ttyname (pfd)); |
130 | return pfd; |
131 | return pfd; |
131 | } |
132 | } |
132 | #endif |
133 | #endif |
133 | |
134 | |
134 | #ifdef PTYS_ARE_CLONE |
135 | #ifdef PTYS_ARE_CLONE |
135 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
136 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
136 | { |
137 | { |
137 | *ttydev = ptsname (pfd); |
138 | *ttydev = strdup (ptsname (pfd)); |
138 | return pfd; |
139 | return pfd; |
139 | } |
140 | } |
140 | #endif |
141 | #endif |
141 | |
142 | |
142 | #ifdef PTYS_ARE_NUMERIC |
143 | #ifdef PTYS_ARE_NUMERIC |
143 | { |
144 | { |
144 | int idx; |
145 | int idx; |
145 | char *c1, *c2; |
146 | char *c1, *c2; |
146 | char pty_name[] = "/dev/ptyp???"; |
147 | char pty_name[] = "/dev/ptyp???"; |
147 | char tty_name[] = "/dev/ttyp???"; |
148 | char tty_name[] = "/dev/ttyp???"; |
148 | |
149 | |
149 | c1 = & (pty_name[sizeof (pty_name) - 4]); |
150 | c1 = &(pty_name[sizeof (pty_name) - 4]); |
150 | c2 = & (tty_name[sizeof (tty_name) - 4]); |
151 | c2 = &(tty_name[sizeof (tty_name) - 4]); |
151 | for (idx = 0; idx < 256; idx++) |
152 | for (idx = 0; idx < 256; idx++) |
152 | { |
153 | { |
153 | sprintf (c1, "%d", idx); |
154 | sprintf (c1, "%d", idx); |
154 | sprintf (c2, "%d", idx); |
155 | sprintf (c2, "%d", idx); |
155 | if (access (tty_name, F_OK) < 0) |
156 | if (access (tty_name, F_OK) < 0) |
156 | { |
157 | { |
157 | idx = 256; |
158 | idx = 256; |
158 | break; |
159 | break; |
159 | } |
160 | } |
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161 | |
160 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
162 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
161 | { |
163 | { |
162 | if (access (tty_name, R_OK | W_OK) == 0) |
164 | if (access (tty_name, R_OK | W_OK) == 0) |
163 | { |
165 | { |
164 | *ttydev = strdup (tty_name); |
166 | *ttydev = strdup (tty_name); |
165 | return pfd; |
167 | return pfd; |
166 | } |
168 | } |
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169 | |
167 | close (pfd); |
170 | close (pfd); |
168 | } |
171 | } |
169 | } |
172 | } |
170 | } |
173 | } |
171 | #endif |
174 | #endif |
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175 | |
172 | #ifdef PTYS_ARE_SEARCHED |
176 | #ifdef PTYS_ARE_SEARCHED |
173 | { |
177 | { |
174 | const char *c1, *c2; |
178 | const char *c1, *c2; |
175 | char pty_name[] = "/dev/pty??"; |
179 | char pty_name[] = "/dev/pty??"; |
176 | char tty_name[] = "/dev/tty??"; |
180 | char tty_name[] = "/dev/tty??"; |
177 | |
181 | |
178 | # ifndef PTYCHAR1 |
182 | # ifndef PTYCHAR1 |
179 | # define PTYCHAR1 "pqrstuvwxyz" |
183 | # define PTYCHAR1 "pqrstuvwxyz" |
180 | # endif |
184 | # endif |
181 | # ifndef PTYCHAR2 |
185 | # ifndef PTYCHAR2 |
… | |
… | |
195 | if (access (tty_name, R_OK | W_OK) == 0) |
199 | if (access (tty_name, R_OK | W_OK) == 0) |
196 | { |
200 | { |
197 | *ttydev = strdup (tty_name); |
201 | *ttydev = strdup (tty_name); |
198 | return pfd; |
202 | return pfd; |
199 | } |
203 | } |
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204 | |
200 | close (pfd); |
205 | close (pfd); |
201 | } |
206 | } |
202 | } |
207 | } |
203 | } |
208 | } |
204 | } |
209 | } |
205 | #endif |
210 | #endif |
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211 | |
206 | return -1; |
212 | return -1; |
207 | } |
213 | } |
208 | |
214 | |
209 | /*----------------------------------------------------------------------*/ |
215 | /*----------------------------------------------------------------------*/ |
210 | /* |
216 | /* |
211 | * Returns tty file descriptor, or -1 on failure |
217 | * Returns tty file descriptor, or -1 on failure |
212 | */ |
218 | */ |
213 | /* EXTPROTO */ |
219 | static int |
214 | int |
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215 | rxvt_get_tty (const char *ttydev) |
220 | get_tty (char *ttydev) |
216 | { |
221 | { |
217 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
222 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
218 | } |
223 | } |
219 | |
224 | |
220 | /*----------------------------------------------------------------------*/ |
225 | /*----------------------------------------------------------------------*/ |
221 | /* |
226 | /* |
222 | * Make our tty a controlling tty so that /dev/tty points to us |
227 | * Make our tty a controlling tty so that /dev/tty points to us |
223 | */ |
228 | */ |
224 | /* EXTPROTO */ |
229 | static int |
225 | int |
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226 | rxvt_control_tty (int fd_tty, const char *ttydev) |
230 | control_tty (int fd_tty, const char *ttydev) |
227 | { |
231 | { |
228 | #ifndef __QNX__ |
232 | #ifndef __QNX__ |
229 | int fd; |
233 | int fd; |
230 | |
234 | |
231 | D_TTY ((stderr, "rxvt_control_tty (): pid: %d, tty fd: %d, dev: %s", getpid (), fd_tty, ttydev)); |
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232 | /* ---------------------------------------- */ |
235 | /* ---------------------------------------- */ |
233 | # ifdef HAVE_SETSID |
236 | # ifdef HAVE_SETSID |
234 | setsid (); |
237 | setsid (); |
235 | # endif |
238 | # endif |
236 | # if defined(HAVE_SETPGID) |
239 | # if defined(HAVE_SETPGID) |
237 | setpgid (0, 0); |
240 | setpgid (0, 0); |
238 | # elif defined(HAVE_SETPGRP) |
241 | # elif defined(HAVE_SETPGRP) |
239 | setpgrp (0, 0); |
242 | setpgrp (0, 0); |
240 | # endif |
243 | # endif |
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244 | |
241 | /* ---------------------------------------- */ |
245 | /* ---------------------------------------- */ |
242 | # ifdef TIOCNOTTY |
246 | # ifdef TIOCNOTTY |
243 | |
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244 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
247 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
245 | D_TTY ((stderr, "rxvt_control_tty (): Voiding tty associations: previous=%s", fd < 0 ? "no" : "yes")); |
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246 | if (fd >= 0) |
248 | if (fd >= 0) |
247 | { |
249 | { |
248 | ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ |
250 | ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ |
249 | close (fd); |
251 | close (fd); |
250 | } |
252 | } |
251 | # endif |
253 | # endif |
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254 | |
252 | /* ---------------------------------------- */ |
255 | /* ---------------------------------------- */ |
253 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
256 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
254 | D_TTY ((stderr, "rxvt_control_tty (): /dev/tty has controlling tty? %s", fd < 0 ? "no (good)" : "yes (bad)")); |
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255 | if (fd >= 0) |
257 | if (fd >= 0) |
256 | close (fd); /* ouch: still have controlling tty */ |
258 | close (fd); /* ouch: still have controlling tty */ |
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259 | |
257 | /* ---------------------------------------- */ |
260 | /* ---------------------------------------- */ |
258 | #if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
261 | #if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
259 | /* |
262 | /* |
260 | * Push STREAMS modules: |
263 | * Push STREAMS modules: |
261 | * ptem: pseudo-terminal hardware emulation module. |
264 | * ptem: pseudo-terminal hardware emulation module. |
… | |
… | |
275 | */ |
278 | */ |
276 | # ifdef HAVE_ISASTREAM |
279 | # ifdef HAVE_ISASTREAM |
277 | if (isastream (fd_tty) == 1) |
280 | if (isastream (fd_tty) == 1) |
278 | # endif |
281 | # endif |
279 | { |
282 | { |
280 | D_TTY ((stderr, "rxvt_control_tty (): Pushing STREAMS modules")); |
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281 | ioctl (fd_tty, I_PUSH, "ptem"); |
283 | ioctl (fd_tty, I_PUSH, "ptem"); |
282 | ioctl (fd_tty, I_PUSH, "ldterm"); |
284 | ioctl (fd_tty, I_PUSH, "ldterm"); |
283 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
285 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
284 | } |
286 | } |
285 | #endif |
287 | #endif |
286 | /* ---------------------------------------- */ |
288 | /* ---------------------------------------- */ |
287 | # if defined(TIOCSCTTY) |
289 | # if defined(TIOCSCTTY) |
288 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
290 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
289 | D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSCTTY): %d", fd)); |
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290 | # elif defined(TIOCSETCTTY) |
291 | # elif defined(TIOCSETCTTY) |
291 | fd = ioctl (fd_tty, TIOCSETCTTY, NULL); |
292 | fd = ioctl (fd_tty, TIOCSETCTTY, NULL); |
292 | D_TTY ((stderr, "rxvt_control_tty (): ioctl (..,TIOCSETCTTY): %d", fd)); |
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293 | # else |
293 | # else |
294 | fd = open (ttydev, O_RDWR); |
294 | fd = open (ttydev, O_RDWR); |
295 | D_TTY ((stderr, "rxvt_control_tty (): tty open%s", fd < 0 ? " failure" : "ed OK")); |
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296 | if (fd >= 0) |
295 | if (fd >= 0) |
297 | close (fd); |
296 | close (fd); |
298 | # endif |
297 | # endif |
299 | /* ---------------------------------------- */ |
298 | /* ---------------------------------------- */ |
300 | fd = open ("/dev/tty", O_WRONLY); |
299 | fd = open ("/dev/tty", O_WRONLY); |
301 | D_TTY ((stderr, "rxvt_control_tty (): do we have controlling tty now: %s", fd < 0 ? "no (fatal)" : "yes (good)")); |
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302 | if (fd < 0) |
300 | if (fd < 0) |
303 | return -1; /* fatal */ |
301 | return -1; /* fatal */ |
304 | close (fd); |
302 | close (fd); |
305 | /* ---------------------------------------- */ |
303 | /* ---------------------------------------- */ |
306 | D_TTY ((stderr, "rxvt_control_tty (): tcgetpgrp (): %d getpgrp (): %d", tcgetpgrp (fd_tty), getpgrp ())); |
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307 | /* ---------------------------------------- */ |
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308 | #endif /* ! __QNX__ */ |
304 | #endif /* ! __QNX__ */ |
309 | |
305 | |
310 | return 0; |
306 | return 0; |
311 | } |
307 | } |
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308 | |
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309 | #ifndef NO_SETOWNER_TTYDEV |
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310 | static struct ttyconf { |
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311 | gid_t gid; |
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312 | mode_t mode; |
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313 | |
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314 | ttyconf () |
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315 | { |
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316 | #ifdef TTY_GID_SUPPORT |
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317 | struct group *gr = getgrnam ("tty"); |
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318 | |
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319 | if (gr) |
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320 | { /* change group ownership of tty to "tty" */ |
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321 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
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322 | gid = gr->gr_gid; |
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323 | } |
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324 | else |
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325 | #endif /* TTY_GID_SUPPORT */ |
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326 | { |
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327 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
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328 | gid = getgid (); |
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329 | } |
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330 | } |
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331 | } ttyconf; |
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332 | |
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333 | void |
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334 | rxvt_ptytty::privileges (rxvt_privaction action) |
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335 | { |
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336 | rxvt_privileges (RESTORE); |
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337 | |
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338 | if (action == SAVE) |
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339 | { |
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340 | //next_tty_action = RESTORE; |
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341 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
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342 | /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
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343 | if (lstat (name, &savestat) < 0) /* you lose out */ |
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344 | ;//next_tty_action = IGNORE; |
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345 | else |
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346 | # endif |
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347 | |
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348 | { |
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349 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
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350 | chmod (name, ttyconf.mode); |
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351 | # ifdef HAVE_REVOKE |
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352 | revoke (name); |
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353 | # endif |
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354 | |
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355 | } |
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356 | } |
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357 | else |
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358 | { /* action == RESTORE */ |
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359 | //next_tty_action = IGNORE; |
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360 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
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361 | chmod (name, savestat.st_mode); |
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362 | chown (name, savestat.st_uid, savestat.st_gid); |
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363 | # else |
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364 | chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
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365 | chown (name, 0, 0); |
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366 | # endif |
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367 | |
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368 | } |
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369 | |
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370 | rxvt_privileges (IGNORE); |
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371 | } |
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372 | #endif |
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373 | |
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374 | rxvt_ptytty::rxvt_ptytty () |
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375 | { |
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376 | pty = tty = -1; |
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377 | name = 0; |
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378 | } |
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379 | |
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380 | rxvt_ptytty::~rxvt_ptytty () |
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381 | { |
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382 | put (); |
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383 | } |
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384 | |
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385 | void |
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386 | |
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387 | rxvt_ptytty::close_tty () |
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388 | { |
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389 | if (tty >= 0) close (tty); |
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390 | tty = -1; |
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391 | } |
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392 | |
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393 | void |
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394 | rxvt_ptytty::put () |
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395 | { |
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396 | #ifndef NO_SETOWNER_TTYDEV |
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397 | if (tty >= 0) |
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398 | privileges (RESTORE); |
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399 | #endif |
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400 | |
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401 | if (pty >= 0) close (pty); |
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402 | close_tty (); |
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403 | free (name); |
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404 | |
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405 | pty = tty = -1; |
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406 | name = 0; |
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407 | } |
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408 | |
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409 | bool |
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410 | rxvt_ptytty::make_controlling_tty () |
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411 | { |
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412 | return control_tty (tty, name) >= 0; |
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413 | } |
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414 | |
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415 | bool |
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416 | rxvt_ptytty::get () |
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417 | { |
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418 | /* get master (pty) */ |
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419 | if ((pty = get_pty (&tty, &name)) < 0) |
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420 | return false; |
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421 | |
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422 | fcntl (pty, F_SETFL, O_NONBLOCK); |
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423 | |
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424 | /* get slave (tty) */ |
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425 | if (tty < 0) |
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426 | { |
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427 | #ifndef NO_SETOWNER_TTYDEV |
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428 | privileges (SAVE); |
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429 | #endif |
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430 | |
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431 | if ((tty = get_tty (name)) < 0) |
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432 | { |
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433 | put (); |
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434 | return false; |
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435 | } |
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436 | } |
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437 | |
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438 | return true; |
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439 | } |
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440 | |
312 | /*----------------------- end-of-file (C source) -----------------------*/ |
441 | /*----------------------- end-of-file (C source) -----------------------*/ |
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442 | |