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 |
… | |
… | |
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> |
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34 | #include <sys/stat.h> |
37 | #include <unistd.h> |
35 | #include <unistd.h> |
38 | #include <fcntl.h> |
36 | #include <fcntl.h> |
39 | |
37 | |
40 | #ifdef HAVE_SYS_IOCTL_H |
38 | #ifdef HAVE_SYS_IOCTL_H |
41 | # include <sys/ioctl.h> |
39 | # include <sys/ioctl.h> |
42 | #endif |
40 | #endif |
43 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) |
41 | #ifdef HAVE_STROPTS_H |
44 | # include <sys/stropts.h> /* for I_PUSH */ |
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45 | #endif |
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46 | #ifdef HAVE_ISASTREAM |
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47 | # include <stropts.h> |
42 | # include <stropts.h> |
48 | #endif |
43 | #endif |
49 | #if defined(HAVE_PTY_H) |
44 | #if defined(HAVE_PTY_H) |
50 | # include <pty.h> |
45 | # include <pty.h> |
51 | #elif defined(HAVE_LIBUTIL_H) |
46 | #elif defined(HAVE_LIBUTIL_H) |
… | |
… | |
55 | #endif |
50 | #endif |
56 | #ifdef TTY_GID_SUPPORT |
51 | #ifdef TTY_GID_SUPPORT |
57 | #include <grp.h> |
52 | #include <grp.h> |
58 | #endif |
53 | #endif |
59 | |
54 | |
60 | #include <cstdio> |
55 | #ifndef O_NOCTTY |
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56 | # define O_NOCTTY 0 |
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57 | #endif |
61 | |
58 | |
62 | ///////////////////////////////////////////////////////////////////////////// |
59 | ///////////////////////////////////////////////////////////////////////////// |
63 | |
60 | |
64 | /* ------------------------------------------------------------------------- * |
61 | /* ------------------------------------------------------------------------- * |
65 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
62 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
… | |
… | |
75 | get_pty (int *fd_tty, char **ttydev) |
72 | get_pty (int *fd_tty, char **ttydev) |
76 | { |
73 | { |
77 | int pfd; |
74 | int pfd; |
78 | |
75 | |
79 | # if defined(HAVE_GETPT) |
76 | # if defined(HAVE_GETPT) |
80 | pfd = getpt(); |
77 | pfd = getpt (); |
81 | # elif defined(HAVE_POSIX_OPENPT) |
78 | # elif defined(HAVE_POSIX_OPENPT) |
82 | pfd = posix_openpt (O_RDWR); |
79 | pfd = posix_openpt (O_RDWR | O_NOCTTY); |
83 | # else |
80 | # else |
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81 | # ifdef _AIX |
84 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
82 | pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0); |
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83 | # else |
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84 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
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85 | # endif |
85 | # endif |
86 | # endif |
86 | |
87 | |
87 | if (pfd >= 0) |
88 | if (pfd >= 0) |
88 | { |
89 | { |
89 | if (grantpt (pfd) == 0 /* change slave permissions */ |
90 | if (grantpt (pfd) == 0 /* change slave permissions */ |
90 | && unlockpt (pfd) == 0) |
91 | && unlockpt (pfd) == 0) |
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92 | { |
91 | { /* slave now unlocked */ |
93 | /* slave now unlocked */ |
92 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
94 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
93 | return pfd; |
95 | return pfd; |
94 | } |
96 | } |
95 | |
97 | |
96 | close (pfd); |
98 | close (pfd); |
… | |
… | |
124 | get_pty (int *fd_tty, char **ttydev) |
126 | get_pty (int *fd_tty, char **ttydev) |
125 | { |
127 | { |
126 | int pfd; |
128 | int pfd; |
127 | char *slave; |
129 | char *slave; |
128 | |
130 | |
129 | slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
131 | slave = _getpty (&pfd, O_RDWR | O_NOCTTY, 0622, 0); |
130 | |
132 | |
131 | if (slave != NULL) { |
133 | if (slave != NULL) |
132 | *ttydev = strdup (slave); |
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133 | return pfd; |
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134 | } |
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135 | |
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136 | return -1; |
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137 | } |
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138 | |
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139 | #elif defined(HAVE_DEV_PTC) |
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140 | |
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141 | static int |
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142 | get_pty (int *fd_tty, char **ttydev) |
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143 | { |
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144 | int pfd; |
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145 | |
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146 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
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147 | { |
134 | { |
148 | *ttydev = strdup (ttyname (pfd)); |
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149 | return pfd; |
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150 | } |
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151 | |
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152 | return -1; |
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153 | } |
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154 | |
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155 | #elif defined(HAVE_DEV_CLONE) |
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156 | |
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157 | static int |
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158 | get_pty (int *fd_tty, char **ttydev) |
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159 | { |
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160 | int pfd; |
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161 | |
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162 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
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163 | { |
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164 | *ttydev = strdup (ptsname (pfd)); |
135 | *ttydev = strdup (slave); |
165 | return pfd; |
136 | return pfd; |
166 | } |
137 | } |
167 | |
138 | |
168 | return -1; |
139 | return -1; |
169 | } |
140 | } |
… | |
… | |
181 | const char *majors = "pqrstuvwxyzabcde"; |
152 | const char *majors = "pqrstuvwxyzabcde"; |
182 | const char *minors = "0123456789abcdef"; |
153 | const char *minors = "0123456789abcdef"; |
183 | |
154 | |
184 | for (i = 0; i < 256; i++) |
155 | for (i = 0; i < 256; i++) |
185 | { |
156 | { |
186 | 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]); |
187 | 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]); |
188 | |
159 | |
189 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
160 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
190 | { |
161 | { |
191 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
162 | snprintf (pty_name, 32, "/dev/ptyp%d", i); |
192 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
163 | snprintf (tty_name, 32, "/dev/ttyp%d", i); |
193 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
164 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
194 | continue; |
165 | continue; |
195 | } |
166 | } |
196 | |
167 | |
197 | if (access (tty_name, R_OK | W_OK) == 0) |
168 | if (access (tty_name, R_OK | W_OK) == 0) |
… | |
… | |
227 | { |
198 | { |
228 | int fd; |
199 | int fd; |
229 | |
200 | |
230 | setsid (); |
201 | setsid (); |
231 | |
202 | |
232 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
203 | #ifdef TIOCSCTTY |
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204 | ioctl (fd_tty, TIOCSCTTY, NULL); |
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205 | #else |
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206 | fd = open (ttyname (fd_tty), O_RDWR); |
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207 | if (fd >= 0) |
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208 | close (fd); |
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209 | #endif |
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210 | |
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211 | fd = open ("/dev/tty", O_WRONLY); |
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212 | if (fd < 0) |
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213 | return -1; /* fatal */ |
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214 | |
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215 | close (fd); |
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216 | |
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217 | return 0; |
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218 | } |
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219 | |
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220 | void |
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221 | ptytty::close_tty () |
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222 | { |
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223 | if (tty < 0) |
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224 | return; |
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225 | |
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226 | close (tty); |
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227 | tty = -1; |
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228 | } |
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229 | |
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230 | bool |
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231 | ptytty::make_controlling_tty () |
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232 | { |
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233 | return control_tty (tty) >= 0; |
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234 | } |
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235 | |
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236 | void |
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237 | ptytty::set_utf8_mode (bool on) |
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238 | { |
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239 | #ifdef IUTF8 |
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240 | if (pty < 0) |
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241 | return; |
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242 | |
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243 | struct termios tio; |
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244 | |
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245 | if (tcgetattr (pty, &tio) != -1) |
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246 | { |
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247 | tcflag_t new_cflag = tio.c_iflag; |
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248 | |
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249 | if (on) |
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250 | new_cflag |= IUTF8; |
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251 | else |
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252 | new_cflag &= ~IUTF8; |
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253 | |
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254 | if (new_cflag != tio.c_iflag) |
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255 | { |
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256 | tio.c_iflag = new_cflag; |
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257 | tcsetattr (pty, TCSANOW, &tio); |
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258 | } |
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259 | } |
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260 | #endif |
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261 | } |
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262 | |
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263 | static struct ttyconf { |
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264 | gid_t gid; |
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265 | mode_t mode; |
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266 | |
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267 | ttyconf () |
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268 | { |
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269 | #ifdef TTY_GID_SUPPORT |
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270 | struct group *gr = getgrnam ("tty"); |
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271 | |
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272 | if (gr) |
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273 | { |
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274 | /* change group ownership of tty to "tty" */ |
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275 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
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276 | gid = gr->gr_gid; |
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277 | } |
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278 | else |
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279 | #endif /* TTY_GID_SUPPORT */ |
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280 | { |
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281 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
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282 | gid = 0; |
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283 | } |
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284 | } |
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285 | } ttyconf; |
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286 | |
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287 | ptytty_unix::ptytty_unix () |
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288 | { |
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289 | name = 0; |
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290 | #if UTMP_SUPPORT |
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291 | cmd_pid = 0; |
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292 | #endif |
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293 | } |
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294 | |
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295 | ptytty_unix::~ptytty_unix () |
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296 | { |
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297 | #if UTMP_SUPPORT |
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298 | logout (); |
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299 | #endif |
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300 | put (); |
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301 | } |
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302 | |
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303 | void |
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304 | ptytty_unix::put () |
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305 | { |
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306 | if (name) |
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307 | { |
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308 | chmod (name, RESTORE_TTY_MODE); |
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309 | chown (name, 0, ttyconf.gid); |
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310 | } |
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311 | |
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312 | close_tty (); |
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313 | |
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314 | if (pty >= 0) |
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315 | close (pty); |
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316 | |
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317 | free (name); |
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318 | |
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319 | pty = tty = -1; |
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320 | name = 0; |
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321 | } |
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322 | |
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323 | bool |
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324 | ptytty_unix::get () |
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325 | { |
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326 | /* get master (pty) */ |
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327 | if ((pty = get_pty (&tty, &name)) < 0) |
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328 | return false; |
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329 | |
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330 | /* get slave (tty) */ |
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331 | if (tty < 0) |
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332 | { |
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333 | #ifndef NO_SETOWNER_TTYDEV |
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334 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
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335 | chmod (name, ttyconf.mode); |
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336 | # ifdef HAVE_REVOKE |
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337 | revoke (name); |
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338 | # endif |
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339 | #endif |
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340 | |
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341 | if ((tty = get_tty (name)) < 0) |
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342 | { |
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343 | put (); |
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344 | return false; |
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345 | } |
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346 | } |
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347 | |
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348 | #if defined(I_PUSH) |
233 | /* |
349 | /* |
234 | * Push STREAMS modules: |
350 | * Push STREAMS modules: |
235 | * ptem: pseudo-terminal hardware emulation module. |
351 | * ptem: pseudo-terminal hardware emulation module. |
236 | * ldterm: standard terminal line discipline. |
352 | * ldterm: standard terminal line discipline. |
237 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
353 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
238 | * |
354 | * |
239 | * 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 |
240 | * (i.e. the next section between the dashes giving us "tty opened OK") |
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241 | * should make the "ptem" (or "ldterm" depending upon either which OS |
356 | * should make the "ptem" (or "ldterm" depending upon either which OS |
242 | * 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 |
243 | * controlling terminal. We must already have close ()d the master side |
358 | * controlling terminal. We must already have close ()d the master side |
244 | * 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 |
245 | * documentation is really unclear about whether it is any close () on |
360 | * documentation is really unclear about whether it is any close () on |
246 | * 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 |
247 | * 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 |
248 | * through - Geoff Wing |
363 | * through - Geoff Wing |
249 | */ |
364 | */ |
250 | # ifdef HAVE_ISASTREAM |
365 | #if defined(HAVE_ISASTREAM) && defined(HAVE_STROPTS_H) |
251 | if (isastream (fd_tty) == 1) |
366 | if (isastream (tty) == 1) |
252 | # endif |
367 | # endif |
253 | { |
368 | { |
254 | ioctl (fd_tty, I_PUSH, "ptem"); |
369 | ioctl (tty, I_PUSH, "ptem"); |
255 | ioctl (fd_tty, I_PUSH, "ldterm"); |
370 | ioctl (tty, I_PUSH, "ldterm"); |
256 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
371 | ioctl (tty, I_PUSH, "ttcompat"); |
257 | } |
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258 | #endif |
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259 | |
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260 | #ifdef TIOCSCTTY |
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261 | ioctl (fd_tty, TIOCSCTTY, NULL); |
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262 | #else |
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263 | fd = open (ttyname (fd_tty), O_RDWR); |
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264 | if (fd >= 0) |
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265 | close (fd); |
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266 | #endif |
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267 | |
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268 | fd = open ("/dev/tty", O_WRONLY); |
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269 | if (fd < 0) |
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270 | return -1; /* fatal */ |
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271 | |
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272 | close (fd); |
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273 | |
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274 | return 0; |
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275 | } |
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276 | |
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277 | void |
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278 | ptytty::close_tty () |
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279 | { |
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280 | if (tty < 0) |
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281 | return; |
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282 | |
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283 | close (tty); |
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284 | tty = -1; |
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285 | } |
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286 | |
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287 | bool |
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288 | ptytty::make_controlling_tty () |
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289 | { |
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290 | return control_tty (tty) >= 0; |
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291 | } |
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292 | |
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293 | void |
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294 | ptytty::set_utf8_mode (bool on) |
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295 | { |
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296 | #ifdef IUTF8 |
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297 | if (pty < 0) |
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298 | return; |
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299 | |
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300 | struct termios tio; |
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301 | |
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302 | if (tcgetattr (pty, &tio) != -1) |
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303 | { |
372 | } |
304 | tcflag_t new_cflag = tio.c_iflag; |
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305 | |
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306 | if (on) |
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307 | new_cflag |= IUTF8; |
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308 | else |
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309 | new_cflag &= ~IUTF8; |
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310 | |
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311 | if (new_cflag != tio.c_iflag) |
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312 | { |
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313 | tio.c_iflag = new_cflag; |
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314 | tcsetattr (pty, TCSANOW, &tio); |
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315 | } |
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316 | } |
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317 | #endif |
373 | #endif |
318 | } |
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319 | |
374 | |
320 | static struct ttyconf { |
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321 | gid_t gid; |
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322 | mode_t mode; |
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323 | |
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324 | ttyconf () |
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325 | { |
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326 | #ifdef TTY_GID_SUPPORT |
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327 | struct group *gr = getgrnam ("tty"); |
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328 | |
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329 | if (gr) |
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330 | { /* change group ownership of tty to "tty" */ |
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331 | mode = S_IRUSR | S_IWUSR | S_IWGRP; |
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332 | gid = gr->gr_gid; |
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333 | } |
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334 | else |
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335 | #endif /* TTY_GID_SUPPORT */ |
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336 | { |
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337 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
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338 | gid = 0; |
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339 | } |
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340 | } |
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341 | } ttyconf; |
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342 | |
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343 | ptytty_unix::ptytty_unix () |
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344 | { |
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345 | name = 0; |
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|
346 | #if UTMP_SUPPORT |
375 | #if UTMP_SUPPORT |
347 | cmd_pid = 0; |
376 | # if defined(HAVE_STRUCT_UTMP) && !defined(HAVE_UTMP_PID) |
348 | #endif |
377 | int fd_stdin = dup (STDIN_FILENO); |
349 | } |
378 | dup2 (tty, STDIN_FILENO); |
350 | |
379 | |
351 | ptytty_unix::~ptytty_unix () |
380 | utmp_pos = ttyslot (); |
352 | { |
|
|
353 | #if UTMP_SUPPORT |
|
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354 | logout (); |
|
|
355 | #endif |
|
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356 | put (); |
|
|
357 | } |
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358 | |
381 | |
359 | void |
382 | dup2 (fd_stdin, STDIN_FILENO); |
360 | ptytty_unix::put () |
383 | close (fd_stdin); |
361 | { |
|
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362 | if (name) |
|
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363 | { |
|
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364 | chmod (name, RESTORE_TTY_MODE); |
|
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365 | chown (name, 0, ttyconf.gid); |
|
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366 | } |
|
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367 | |
|
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368 | close_tty (); |
|
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369 | |
|
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370 | if (pty >= 0) |
|
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371 | close (pty); |
|
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372 | |
|
|
373 | free (name); |
|
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374 | |
|
|
375 | pty = tty = -1; |
|
|
376 | name = 0; |
|
|
377 | } |
|
|
378 | |
|
|
379 | bool |
|
|
380 | ptytty_unix::get () |
|
|
381 | { |
|
|
382 | /* get master (pty) */ |
|
|
383 | if ((pty = get_pty (&tty, &name)) < 0) |
|
|
384 | return false; |
|
|
385 | |
|
|
386 | fcntl (pty, F_SETFL, O_NONBLOCK); |
|
|
387 | |
|
|
388 | /* get slave (tty) */ |
|
|
389 | if (tty < 0) |
|
|
390 | { |
|
|
391 | #ifndef NO_SETOWNER_TTYDEV |
|
|
392 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
393 | chmod (name, ttyconf.mode); |
|
|
394 | # ifdef HAVE_REVOKE |
|
|
395 | revoke (name); |
|
|
396 | # endif |
384 | # endif |
397 | #endif |
385 | #endif |
398 | |
386 | |
399 | if ((tty = get_tty (name)) < 0) |
|
|
400 | { |
|
|
401 | put (); |
|
|
402 | return false; |
|
|
403 | } |
|
|
404 | } |
|
|
405 | |
|
|
406 | return true; |
387 | return true; |
407 | } |
388 | } |
408 | |
389 | |