1 | // This file is part of libptytty. Do not make local modifications. |
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2 | // http://software.schmorp.de/pkg/libptytty |
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3 | |
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4 | /*----------------------------------------------------------------------* |
1 | /*----------------------------------------------------------------------* |
5 | * File: ptytty.C |
2 | * File: ptytty.C |
6 | *----------------------------------------------------------------------* |
3 | *----------------------------------------------------------------------* |
7 | * |
4 | * |
8 | * All portions of code are copyright by their respective author/s. |
5 | * All portions of code are copyright by their respective author/s. |
9 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
6 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
10 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
7 | * Copyright (c) 2004-2006 Marc Lehmann <schmorp@schmorp.de> |
11 | * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
8 | * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
12 | * |
9 | * |
13 | * 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 |
14 | * 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 |
15 | * the Free Software Foundation; either version 2 of the License, or |
12 | * the Free Software Foundation; either version 2 of the License, or |
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23 | * 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 |
24 | * along with this program; if not, write to the Free Software |
21 | * along with this program; if not, write to the Free Software |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
26 | *---------------------------------------------------------------------*/ |
23 | *---------------------------------------------------------------------*/ |
27 | |
24 | |
28 | #include "../config.h" |
25 | #include "config.h" |
29 | |
26 | |
30 | #include "ptytty.h" |
27 | #include "ptytty.h" |
31 | |
28 | |
32 | #include <cstdlib> |
29 | #include <stdlib.h> |
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30 | #include <stdio.h> |
33 | #include <cstring> |
31 | #include <string.h> |
34 | #include <csignal> |
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35 | |
32 | |
36 | #include <sys/types.h> |
33 | #include <sys/types.h> |
37 | #include <sys/stat.h> |
34 | #include <sys/stat.h> |
38 | #include <unistd.h> |
35 | #include <unistd.h> |
39 | #include <fcntl.h> |
36 | #include <fcntl.h> |
40 | |
37 | |
41 | #ifdef HAVE_SYS_IOCTL_H |
38 | #ifdef HAVE_SYS_IOCTL_H |
42 | # include <sys/ioctl.h> |
39 | # include <sys/ioctl.h> |
43 | #endif |
40 | #endif |
44 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) |
41 | #if defined(HAVE_SYS_STROPTS_H) |
45 | # include <sys/stropts.h> /* for I_PUSH */ |
42 | # include <sys/stropts.h> /* for I_PUSH */ |
46 | #endif |
43 | #endif |
47 | #ifdef HAVE_ISASTREAM |
44 | #if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H) |
48 | # include <stropts.h> |
45 | # include <stropts.h> |
49 | #endif |
46 | #endif |
50 | #if defined(HAVE_PTY_H) |
47 | #if defined(HAVE_PTY_H) |
51 | # include <pty.h> |
48 | # include <pty.h> |
52 | #elif defined(HAVE_LIBUTIL_H) |
49 | #elif defined(HAVE_LIBUTIL_H) |
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56 | #endif |
53 | #endif |
57 | #ifdef TTY_GID_SUPPORT |
54 | #ifdef TTY_GID_SUPPORT |
58 | #include <grp.h> |
55 | #include <grp.h> |
59 | #endif |
56 | #endif |
60 | |
57 | |
61 | #include <cstdio> |
58 | #ifndef O_NOCTTY |
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59 | # define O_NOCTTY 0 |
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60 | #endif |
62 | |
61 | |
63 | ///////////////////////////////////////////////////////////////////////////// |
62 | ///////////////////////////////////////////////////////////////////////////// |
64 | |
63 | |
65 | /* ------------------------------------------------------------------------- * |
64 | /* ------------------------------------------------------------------------- * |
66 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
65 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
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76 | get_pty (int *fd_tty, char **ttydev) |
75 | get_pty (int *fd_tty, char **ttydev) |
77 | { |
76 | { |
78 | int pfd; |
77 | int pfd; |
79 | |
78 | |
80 | # if defined(HAVE_GETPT) |
79 | # if defined(HAVE_GETPT) |
81 | pfd = getpt(); |
80 | pfd = getpt (); |
82 | # elif defined(HAVE_POSIX_OPENPT) |
81 | # elif defined(HAVE_POSIX_OPENPT) |
83 | pfd = posix_openpt (O_RDWR); |
82 | pfd = posix_openpt (O_RDWR | O_NOCTTY); |
84 | # else |
83 | # else |
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84 | # ifdef _AIX |
85 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
85 | pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0); |
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86 | # else |
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87 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
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88 | # endif |
86 | # endif |
89 | # endif |
87 | |
90 | |
88 | if (pfd >= 0) |
91 | if (pfd >= 0) |
89 | { |
92 | { |
90 | if (grantpt (pfd) == 0 /* change slave permissions */ |
93 | if (grantpt (pfd) == 0 /* change slave permissions */ |
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126 | get_pty (int *fd_tty, char **ttydev) |
129 | get_pty (int *fd_tty, char **ttydev) |
127 | { |
130 | { |
128 | int pfd; |
131 | int pfd; |
129 | char *slave; |
132 | char *slave; |
130 | |
133 | |
131 | slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
134 | slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0); |
132 | |
135 | |
133 | if (slave != NULL) |
136 | if (slave != NULL) |
134 | { |
137 | { |
135 | *ttydev = strdup (slave); |
138 | *ttydev = strdup (slave); |
136 | return pfd; |
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137 | } |
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138 | |
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139 | return -1; |
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140 | } |
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141 | |
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142 | #elif defined(HAVE_DEV_PTC) |
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143 | |
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144 | static int |
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145 | get_pty (int *fd_tty, char **ttydev) |
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146 | { |
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147 | int pfd; |
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148 | |
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149 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
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150 | { |
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151 | *ttydev = strdup (ttyname (pfd)); |
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152 | return pfd; |
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153 | } |
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154 | |
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155 | return -1; |
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156 | } |
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157 | |
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158 | #elif defined(HAVE_DEV_CLONE) |
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159 | |
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160 | static int |
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161 | get_pty (int *fd_tty, char **ttydev) |
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162 | { |
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163 | int pfd; |
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164 | |
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165 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
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166 | { |
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167 | *ttydev = strdup (ptsname (pfd)); |
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168 | return pfd; |
139 | return pfd; |
169 | } |
140 | } |
170 | |
141 | |
171 | return -1; |
142 | return -1; |
172 | } |
143 | } |
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184 | const char *majors = "pqrstuvwxyzabcde"; |
155 | const char *majors = "pqrstuvwxyzabcde"; |
185 | const char *minors = "0123456789abcdef"; |
156 | const char *minors = "0123456789abcdef"; |
186 | |
157 | |
187 | for (i = 0; i < 256; i++) |
158 | for (i = 0; i < 256; i++) |
188 | { |
159 | { |
189 | snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
160 | snprintf (pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
190 | snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
161 | snprintf (tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
191 | |
162 | |
192 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
163 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
193 | { |
164 | { |
194 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
165 | snprintf (pty_name, 32, "/dev/ptyp%d", i); |
195 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
166 | snprintf (tty_name, 32, "/dev/ttyp%d", i); |
196 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
167 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
197 | continue; |
168 | continue; |
198 | } |
169 | } |
199 | |
170 | |
200 | if (access (tty_name, R_OK | W_OK) == 0) |
171 | if (access (tty_name, R_OK | W_OK) == 0) |
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229 | control_tty (int fd_tty) |
200 | control_tty (int fd_tty) |
230 | { |
201 | { |
231 | int fd; |
202 | int fd; |
232 | |
203 | |
233 | setsid (); |
204 | setsid (); |
234 | |
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235 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
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236 | /* |
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237 | * Push STREAMS modules: |
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238 | * ptem: pseudo-terminal hardware emulation module. |
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239 | * ldterm: standard terminal line discipline. |
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240 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
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241 | * |
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242 | * After we push the STREAMS modules, the first open () on the slave side |
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243 | * (i.e. the next section between the dashes giving us "tty opened OK") |
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244 | * should make the "ptem" (or "ldterm" depending upon either which OS |
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245 | * version or which set of manual pages you have) module give us a |
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246 | * controlling terminal. We must already have close ()d the master side |
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247 | * fd in this child process before we push STREAMS modules on because the |
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248 | * documentation is really unclear about whether it is any close () on |
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249 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
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250 | * close () - on the master side which causes a hang up to be sent |
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251 | * through - Geoff Wing |
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252 | */ |
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253 | # ifdef HAVE_ISASTREAM |
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254 | if (isastream (fd_tty) == 1) |
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255 | # endif |
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256 | { |
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257 | ioctl (fd_tty, I_PUSH, "ptem"); |
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258 | ioctl (fd_tty, I_PUSH, "ldterm"); |
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259 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
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260 | } |
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261 | #endif |
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262 | |
205 | |
263 | #ifdef TIOCSCTTY |
206 | #ifdef TIOCSCTTY |
264 | ioctl (fd_tty, TIOCSCTTY, NULL); |
207 | ioctl (fd_tty, TIOCSCTTY, NULL); |
265 | #else |
208 | #else |
266 | fd = open (ttyname (fd_tty), O_RDWR); |
209 | fd = open (ttyname (fd_tty), O_RDWR); |
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385 | { |
328 | { |
386 | /* get master (pty) */ |
329 | /* get master (pty) */ |
387 | if ((pty = get_pty (&tty, &name)) < 0) |
330 | if ((pty = get_pty (&tty, &name)) < 0) |
388 | return false; |
331 | return false; |
389 | |
332 | |
390 | fcntl (pty, F_SETFL, O_NONBLOCK); |
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391 | |
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392 | /* get slave (tty) */ |
333 | /* get slave (tty) */ |
393 | if (tty < 0) |
334 | if (tty < 0) |
394 | { |
335 | { |
395 | #ifndef NO_SETOWNER_TTYDEV |
336 | #ifndef NO_SETOWNER_TTYDEV |
396 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
337 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
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405 | put (); |
346 | put (); |
406 | return false; |
347 | return false; |
407 | } |
348 | } |
408 | } |
349 | } |
409 | |
350 | |
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351 | #if defined(I_PUSH) |
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352 | /* |
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353 | * Push STREAMS modules: |
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354 | * ptem: pseudo-terminal hardware emulation module. |
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355 | * ldterm: standard terminal line discipline. |
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356 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
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357 | * |
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358 | * After we push the STREAMS modules, the first open () on the slave side |
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359 | * should make the "ptem" (or "ldterm" depending upon either which OS |
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360 | * version or which set of manual pages you have) module give us a |
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361 | * controlling terminal. We must already have close ()d the master side |
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362 | * fd in this child process before we push STREAMS modules on because the |
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363 | * documentation is really unclear about whether it is any close () on |
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364 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
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365 | * close () - on the master side which causes a hang up to be sent |
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366 | * through - Geoff Wing |
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367 | */ |
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368 | #if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H) |
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369 | if (isastream (tty) == 1) |
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370 | # endif |
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371 | { |
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372 | ioctl (tty, I_PUSH, "ptem"); |
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373 | ioctl (tty, I_PUSH, "ldterm"); |
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374 | ioctl (tty, I_PUSH, "ttcompat"); |
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375 | } |
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376 | #endif |
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377 | |
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378 | #if UTMP_SUPPORT |
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379 | # if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID) |
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380 | int fd_stdin = dup (STDIN_FILENO); |
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381 | dup2 (tty, STDIN_FILENO); |
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382 | |
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383 | utmp_pos = ttyslot (); |
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384 | |
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385 | dup2 (fd_stdin, STDIN_FILENO); |
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386 | close (fd_stdin); |
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387 | # endif |
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388 | #endif |
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389 | |
410 | return true; |
390 | return true; |
411 | } |
391 | } |
412 | |
392 | |