|
|
1 | // This file is part of libptytty. Do not make local modifications. |
|
|
2 | // http://software.schmorp.de/pkg/libptytty |
|
|
3 | |
1 | /*--------------------------------*-C-*---------------------------------* |
4 | /*----------------------------------------------------------------------* |
2 | * File: ptytty.C |
5 | * File: ptytty.C |
3 | *----------------------------------------------------------------------* |
6 | *----------------------------------------------------------------------* |
4 | * |
7 | * |
5 | * All portions of code are copyright by their respective author/s. |
8 | * All portions of code are copyright by their respective author/s. |
6 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
9 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
7 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
10 | * Copyright (c) 2004-2006 Marc Lehmann <pcg@goof.com> |
|
|
11 | * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
8 | * |
12 | * |
9 | * This program is free software; you can redistribute it and/or modify |
13 | * This program is free software; you can redistribute it and/or modify |
10 | * it under the terms of the GNU General Public License as published by |
14 | * it under the terms of the GNU General Public License as published by |
11 | * the Free Software Foundation; either version 2 of the License, or |
15 | * the Free Software Foundation; either version 2 of the License, or |
12 | * (at your option) any later version. |
16 | * (at your option) any later version. |
… | |
… | |
19 | * You should have received a copy of the GNU General Public License |
23 | * You should have received a copy of the GNU General Public License |
20 | * along with this program; if not, write to the Free Software |
24 | * along with this program; if not, write to the Free Software |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
22 | *---------------------------------------------------------------------*/ |
26 | *---------------------------------------------------------------------*/ |
23 | |
27 | |
24 | #include "../config.h" /* NECESSARY */ |
28 | #include "../config.h" |
|
|
29 | |
25 | #include "rxvt.h" |
30 | #include "ptytty.h" |
26 | |
31 | |
27 | # include <cstdlib> |
32 | #include <cstdlib> |
28 | # include <cstring> |
33 | #include <cstring> |
29 | |
34 | |
30 | #ifdef HAVE_SYS_TYPES_H |
|
|
31 | # include <sys/types.h> |
35 | #include <sys/types.h> |
32 | #endif |
36 | #include <sys/socket.h> |
33 | #ifdef HAVE_UNISTD_H |
|
|
34 | # include <unistd.h> |
37 | #include <unistd.h> |
35 | #endif |
|
|
36 | #ifdef HAVE_FCNTL_H |
|
|
37 | # include <fcntl.h> |
38 | #include <fcntl.h> |
38 | #endif |
39 | |
39 | #ifdef HAVE_SYS_IOCTL_H |
40 | #ifdef HAVE_SYS_IOCTL_H |
40 | # include <sys/ioctl.h> |
41 | # include <sys/ioctl.h> |
41 | #endif |
42 | #endif |
42 | #if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) |
43 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) |
43 | # include <sys/stropts.h> /* for I_PUSH */ |
44 | # include <sys/stropts.h> /* for I_PUSH */ |
44 | #endif |
45 | #endif |
45 | #ifdef HAVE_ISASTREAM |
46 | #ifdef HAVE_ISASTREAM |
46 | # include <stropts.h> |
47 | # include <stropts.h> |
47 | #endif |
48 | #endif |
… | |
… | |
50 | #elif defined(HAVE_LIBUTIL_H) |
51 | #elif defined(HAVE_LIBUTIL_H) |
51 | # include <libutil.h> |
52 | # include <libutil.h> |
52 | #elif defined(HAVE_UTIL_H) |
53 | #elif defined(HAVE_UTIL_H) |
53 | # include <util.h> |
54 | # include <util.h> |
54 | #endif |
55 | #endif |
|
|
56 | #ifdef TTY_GID_SUPPORT |
|
|
57 | #include <grp.h> |
|
|
58 | #endif |
55 | |
59 | |
56 | #include <cstdio> |
60 | #include <cstdio> |
57 | #include <grp.h> |
61 | |
|
|
62 | ///////////////////////////////////////////////////////////////////////////// |
58 | |
63 | |
59 | /* ------------------------------------------------------------------------- * |
64 | /* ------------------------------------------------------------------------- * |
60 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
65 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
61 | * ------------------------------------------------------------------------- */ |
66 | * ------------------------------------------------------------------------- */ |
62 | /* |
67 | /* |
63 | * Returns pty file descriptor, or -1 on failure |
68 | * Returns pty file descriptor, or -1 on failure |
64 | * If successful, ttydev is set to the name of the slave device. |
69 | * If successful, ttydev is set to the name of the slave device. |
65 | * fd_tty _may_ also be set to an open fd to the slave device |
70 | * fd_tty _may_ also be set to an open fd to the slave device |
66 | */ |
71 | */ |
|
|
72 | #if defined(UNIX98_PTY) |
67 | static int |
73 | static int |
68 | get_pty (int *fd_tty, char **ttydev) |
74 | get_pty (int *fd_tty, char **ttydev) |
69 | { |
75 | { |
70 | int pfd; |
76 | int pfd; |
71 | |
77 | |
72 | #ifdef PTYS_ARE_OPENPTY |
78 | # if defined(HAVE_GETPT) |
73 | char tty_name[sizeof "/dev/pts/????\0"]; |
79 | pfd = getpt(); |
|
|
80 | # elif defined(HAVE_POSIX_OPENPT) |
|
|
81 | pfd = posix_openpt (O_RDWR); |
|
|
82 | # else |
|
|
83 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
|
|
84 | # endif |
|
|
85 | if (pfd >= 0) |
|
|
86 | { |
|
|
87 | if (grantpt (pfd) == 0 /* change slave permissions */ |
|
|
88 | && unlockpt (pfd) == 0) |
|
|
89 | { /* slave now unlocked */ |
|
|
90 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
|
|
91 | return pfd; |
|
|
92 | } |
74 | |
93 | |
75 | rxvt_privileges(RESTORE); |
94 | close (pfd); |
|
|
95 | } |
|
|
96 | |
|
|
97 | return -1; |
|
|
98 | } |
|
|
99 | #elif defined(HAVE_OPENPTY) |
|
|
100 | static int |
|
|
101 | get_pty (int *fd_tty, char **ttydev) |
|
|
102 | { |
|
|
103 | int pfd; |
|
|
104 | int res; |
|
|
105 | char tty_name[32]; |
|
|
106 | |
76 | int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
107 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
77 | rxvt_privileges(IGNORE); |
|
|
78 | |
|
|
79 | if (res != -1) |
108 | if (res != -1) |
80 | { |
109 | { |
81 | *ttydev = strdup (tty_name); |
110 | *ttydev = strdup (tty_name); |
82 | return pfd; |
111 | return pfd; |
83 | } |
112 | } |
84 | #endif |
|
|
85 | |
113 | |
86 | #ifdef PTYS_ARE__GETPTY |
114 | return -1; |
|
|
115 | } |
|
|
116 | #elif defined(HAVE__GETPTY) |
|
|
117 | static int |
|
|
118 | get_pty (int *fd_tty, char **ttydev) |
|
|
119 | { |
|
|
120 | int pfd; |
|
|
121 | |
87 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
122 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
88 | if (*ttydev != NULL) |
123 | if (*ttydev != NULL) |
89 | return pfd; |
124 | return pfd; |
90 | #endif |
|
|
91 | |
125 | |
92 | #ifdef PTYS_ARE_GETPTY |
126 | return -1; |
93 | char *ptydev; |
127 | } |
|
|
128 | #elif defined(HAVE_DEV_PTC) |
|
|
129 | static int |
|
|
130 | get_pty (int *fd_tty, char **ttydev) |
|
|
131 | { |
|
|
132 | int pfd; |
94 | |
133 | |
95 | while ((ptydev = getpty ()) != NULL) |
|
|
96 | if ((pfd = open (ptydev, O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
97 | { |
|
|
98 | *ttydev = ptydev; |
|
|
99 | return pfd; |
|
|
100 | } |
|
|
101 | #endif |
|
|
102 | |
|
|
103 | #if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) |
|
|
104 | # if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_PTMX) |
|
|
105 | |
|
|
106 | { |
|
|
107 | # ifdef PTYS_ARE_GETPT |
|
|
108 | pfd = getpt (); |
|
|
109 | # else |
|
|
110 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
|
|
111 | # endif |
|
|
112 | |
|
|
113 | if (pfd >= 0) |
|
|
114 | { |
|
|
115 | if (grantpt (pfd) == 0 /* change slave permissions */ |
|
|
116 | && unlockpt (pfd) == 0) |
|
|
117 | { /* slave now unlocked */ |
|
|
118 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
|
|
119 | return pfd; |
|
|
120 | } |
|
|
121 | close (pfd); |
|
|
122 | } |
|
|
123 | } |
|
|
124 | # endif |
|
|
125 | #endif |
|
|
126 | |
|
|
127 | #ifdef PTYS_ARE_PTC |
|
|
128 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
134 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
129 | { |
135 | { |
130 | *ttydev = strdup (ttyname (pfd)); |
136 | *ttydev = strdup (ttyname (pfd)); |
131 | return pfd; |
137 | return pfd; |
132 | } |
138 | } |
133 | #endif |
|
|
134 | |
139 | |
135 | #ifdef PTYS_ARE_CLONE |
140 | return -1; |
|
|
141 | } |
|
|
142 | #elif defined(HAVE_DEV_CLONE) |
|
|
143 | static int |
|
|
144 | get_pty (int *fd_tty, char **ttydev) |
|
|
145 | { |
|
|
146 | int pfd; |
|
|
147 | |
136 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
148 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
137 | { |
149 | { |
138 | *ttydev = strdup (ptsname (pfd)); |
150 | *ttydev = strdup (ptsname (pfd)); |
139 | return pfd; |
151 | return pfd; |
140 | } |
152 | } |
141 | #endif |
|
|
142 | |
|
|
143 | #ifdef PTYS_ARE_NUMERIC |
|
|
144 | { |
|
|
145 | int idx; |
|
|
146 | char *c1, *c2; |
|
|
147 | char pty_name[] = "/dev/ptyp???"; |
|
|
148 | char tty_name[] = "/dev/ttyp???"; |
|
|
149 | |
|
|
150 | c1 = &(pty_name[sizeof (pty_name) - 4]); |
|
|
151 | c2 = &(tty_name[sizeof (tty_name) - 4]); |
|
|
152 | for (idx = 0; idx < 256; idx++) |
|
|
153 | { |
|
|
154 | sprintf (c1, "%d", idx); |
|
|
155 | sprintf (c2, "%d", idx); |
|
|
156 | if (access (tty_name, F_OK) < 0) |
|
|
157 | { |
|
|
158 | idx = 256; |
|
|
159 | break; |
|
|
160 | } |
|
|
161 | |
|
|
162 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
163 | { |
|
|
164 | if (access (tty_name, R_OK | W_OK) == 0) |
|
|
165 | { |
|
|
166 | *ttydev = strdup (tty_name); |
|
|
167 | return pfd; |
|
|
168 | } |
|
|
169 | |
|
|
170 | close (pfd); |
|
|
171 | } |
|
|
172 | } |
|
|
173 | } |
|
|
174 | #endif |
|
|
175 | |
|
|
176 | #ifdef PTYS_ARE_SEARCHED |
|
|
177 | { |
|
|
178 | const char *c1, *c2; |
|
|
179 | char pty_name[] = "/dev/pty??"; |
|
|
180 | char tty_name[] = "/dev/tty??"; |
|
|
181 | |
|
|
182 | # ifndef PTYCHAR1 |
|
|
183 | # define PTYCHAR1 "pqrstuvwxyz" |
|
|
184 | # endif |
|
|
185 | # ifndef PTYCHAR2 |
|
|
186 | # define PTYCHAR2 "0123456789abcdef" |
|
|
187 | # endif |
|
|
188 | |
|
|
189 | for (c1 = PTYCHAR1; *c1; c1++) |
|
|
190 | { |
|
|
191 | pty_name[ (sizeof (pty_name) - 3)] = |
|
|
192 | tty_name[ (sizeof (pty_name) - 3)] = *c1; |
|
|
193 | for (c2 = PTYCHAR2; *c2; c2++) |
|
|
194 | { |
|
|
195 | pty_name[ (sizeof (pty_name) - 2)] = |
|
|
196 | tty_name[ (sizeof (pty_name) - 2)] = *c2; |
|
|
197 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
198 | { |
|
|
199 | if (access (tty_name, R_OK | W_OK) == 0) |
|
|
200 | { |
|
|
201 | *ttydev = strdup (tty_name); |
|
|
202 | return pfd; |
|
|
203 | } |
|
|
204 | |
|
|
205 | close (pfd); |
|
|
206 | } |
|
|
207 | } |
|
|
208 | } |
|
|
209 | } |
|
|
210 | #endif |
|
|
211 | |
153 | |
212 | return -1; |
154 | return -1; |
213 | } |
155 | } |
|
|
156 | #else |
|
|
157 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
|
|
158 | static int |
|
|
159 | get_pty (int *fd_tty, char **ttydev) |
|
|
160 | { |
|
|
161 | int pfd; |
|
|
162 | int i; |
|
|
163 | char pty_name[32]; |
|
|
164 | char tty_name[32]; |
|
|
165 | const char *majors = "pqrstuvwxyzabcde"; |
|
|
166 | const char *minors = "0123456789abcdef"; |
|
|
167 | for (i = 0; i < 256; i++) |
|
|
168 | { |
|
|
169 | snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
|
|
170 | snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
|
|
171 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
|
|
172 | { |
|
|
173 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
|
|
174 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
|
|
175 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
|
|
176 | continue; |
|
|
177 | } |
|
|
178 | if (access (tty_name, R_OK | W_OK) == 0) |
|
|
179 | { |
|
|
180 | *ttydev = strdup (tty_name); |
|
|
181 | return pfd; |
|
|
182 | } |
|
|
183 | |
|
|
184 | close (pfd); |
|
|
185 | } |
|
|
186 | } |
|
|
187 | #endif |
214 | |
188 | |
215 | /*----------------------------------------------------------------------*/ |
189 | /*----------------------------------------------------------------------*/ |
216 | /* |
190 | /* |
217 | * Returns tty file descriptor, or -1 on failure |
191 | * Returns tty file descriptor, or -1 on failure |
218 | */ |
192 | */ |
… | |
… | |
225 | /*----------------------------------------------------------------------*/ |
199 | /*----------------------------------------------------------------------*/ |
226 | /* |
200 | /* |
227 | * Make our tty a controlling tty so that /dev/tty points to us |
201 | * Make our tty a controlling tty so that /dev/tty points to us |
228 | */ |
202 | */ |
229 | static int |
203 | static int |
230 | control_tty (int fd_tty, const char *ttydev) |
204 | control_tty (int fd_tty) |
231 | { |
205 | { |
232 | #ifndef __QNX__ |
|
|
233 | int fd; |
|
|
234 | |
|
|
235 | /* ---------------------------------------- */ |
|
|
236 | # ifdef HAVE_SETSID |
|
|
237 | setsid (); |
206 | setsid (); |
238 | # endif |
|
|
239 | # if defined(HAVE_SETPGID) |
|
|
240 | setpgid (0, 0); |
|
|
241 | # elif defined(HAVE_SETPGRP) |
|
|
242 | setpgrp (0, 0); |
|
|
243 | # endif |
|
|
244 | |
207 | |
245 | /* ---------------------------------------- */ |
|
|
246 | # ifdef TIOCNOTTY |
|
|
247 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
|
|
248 | if (fd >= 0) |
|
|
249 | { |
|
|
250 | ioctl (fd, TIOCNOTTY, NULL); /* void tty associations */ |
|
|
251 | close (fd); |
|
|
252 | } |
|
|
253 | # endif |
|
|
254 | |
|
|
255 | /* ---------------------------------------- */ |
|
|
256 | fd = open ("/dev/tty", O_RDWR | O_NOCTTY); |
|
|
257 | if (fd >= 0) |
|
|
258 | close (fd); /* ouch: still have controlling tty */ |
|
|
259 | |
|
|
260 | /* ---------------------------------------- */ |
|
|
261 | #if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
208 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
262 | /* |
209 | /* |
263 | * Push STREAMS modules: |
210 | * Push STREAMS modules: |
264 | * ptem: pseudo-terminal hardware emulation module. |
211 | * ptem: pseudo-terminal hardware emulation module. |
265 | * ldterm: standard terminal line discipline. |
212 | * ldterm: standard terminal line discipline. |
266 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
213 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
… | |
… | |
283 | ioctl (fd_tty, I_PUSH, "ptem"); |
230 | ioctl (fd_tty, I_PUSH, "ptem"); |
284 | ioctl (fd_tty, I_PUSH, "ldterm"); |
231 | ioctl (fd_tty, I_PUSH, "ldterm"); |
285 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
232 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
286 | } |
233 | } |
287 | #endif |
234 | #endif |
288 | /* ---------------------------------------- */ |
235 | |
289 | # if defined(TIOCSCTTY) |
|
|
290 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
236 | ioctl (fd_tty, TIOCSCTTY, NULL); |
291 | # elif defined(TIOCSETCTTY) |
237 | |
292 | fd = ioctl (fd_tty, TIOCSETCTTY, NULL); |
|
|
293 | # else |
|
|
294 | fd = open (ttydev, O_RDWR); |
|
|
295 | if (fd >= 0) |
|
|
296 | close (fd); |
|
|
297 | # endif |
|
|
298 | /* ---------------------------------------- */ |
|
|
299 | fd = open ("/dev/tty", O_WRONLY); |
238 | int fd = open ("/dev/tty", O_WRONLY); |
300 | if (fd < 0) |
239 | if (fd < 0) |
301 | return -1; /* fatal */ |
240 | return -1; /* fatal */ |
|
|
241 | |
302 | close (fd); |
242 | close (fd); |
303 | /* ---------------------------------------- */ |
|
|
304 | #endif /* ! __QNX__ */ |
|
|
305 | |
243 | |
306 | return 0; |
244 | return 0; |
307 | } |
245 | } |
308 | |
246 | |
309 | #ifndef NO_SETOWNER_TTYDEV |
247 | void |
|
|
248 | ptytty::close_tty () |
|
|
249 | { |
|
|
250 | if (tty < 0) |
|
|
251 | return; |
|
|
252 | |
|
|
253 | close (tty); |
|
|
254 | tty = -1; |
|
|
255 | } |
|
|
256 | |
|
|
257 | bool |
|
|
258 | ptytty::make_controlling_tty () |
|
|
259 | { |
|
|
260 | return control_tty (tty) >= 0; |
|
|
261 | } |
|
|
262 | |
|
|
263 | void |
|
|
264 | ptytty::set_utf8_mode (bool on) |
|
|
265 | { |
|
|
266 | #ifdef IUTF8 |
|
|
267 | if (pty < 0) |
|
|
268 | return; |
|
|
269 | |
|
|
270 | struct termios tio; |
|
|
271 | |
|
|
272 | if (tcgetattr (pty, &tio) != -1) |
|
|
273 | { |
|
|
274 | tcflag_t new_cflag = tio.c_iflag; |
|
|
275 | |
|
|
276 | if (on) |
|
|
277 | new_cflag |= IUTF8; |
|
|
278 | else |
|
|
279 | new_cflag &= ~IUTF8; |
|
|
280 | |
|
|
281 | if (new_cflag != tio.c_iflag) |
|
|
282 | { |
|
|
283 | tio.c_iflag = new_cflag; |
|
|
284 | tcsetattr (pty, TCSANOW, &tio); |
|
|
285 | } |
|
|
286 | } |
|
|
287 | #endif |
|
|
288 | } |
|
|
289 | |
310 | static struct ttyconf { |
290 | static struct ttyconf { |
311 | gid_t gid; |
291 | gid_t gid; |
312 | mode_t mode; |
292 | mode_t mode; |
313 | |
293 | |
314 | ttyconf () |
294 | ttyconf () |
… | |
… | |
323 | } |
303 | } |
324 | else |
304 | else |
325 | #endif /* TTY_GID_SUPPORT */ |
305 | #endif /* TTY_GID_SUPPORT */ |
326 | { |
306 | { |
327 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
307 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
328 | gid = getgid (); |
308 | gid = 0; |
329 | } |
309 | } |
330 | } |
310 | } |
331 | } ttyconf; |
311 | } ttyconf; |
332 | |
312 | |
|
|
313 | ptytty_unix::ptytty_unix () |
|
|
314 | { |
|
|
315 | name = 0; |
|
|
316 | #if UTMP_SUPPORT |
|
|
317 | cmd_pid = 0; |
|
|
318 | #endif |
|
|
319 | } |
|
|
320 | |
|
|
321 | ptytty_unix::~ptytty_unix () |
|
|
322 | { |
|
|
323 | #if UTMP_SUPPORT |
|
|
324 | logout (); |
|
|
325 | #endif |
|
|
326 | put (); |
|
|
327 | } |
|
|
328 | |
333 | void |
329 | void |
334 | rxvt_ptytty::privileges (rxvt_privaction action) |
330 | ptytty_unix::put () |
335 | { |
331 | { |
336 | if (!name || !*name) |
332 | chmod (name, RESTORE_TTY_MODE); |
337 | return; |
333 | chown (name, 0, ttyconf.gid); |
338 | |
334 | |
339 | rxvt_privileges (RESTORE); |
335 | close_tty (); |
340 | |
336 | |
341 | if (action == SAVE) |
337 | if (pty >= 0) |
342 | { |
338 | close (pty); |
343 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
|
|
344 | /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
|
|
345 | if (lstat (name, &savestat) < 0) /* you lose out */ |
|
|
346 | ; |
|
|
347 | else |
|
|
348 | # endif |
|
|
349 | { |
|
|
350 | saved = true; |
|
|
351 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
352 | chmod (name, ttyconf.mode); |
|
|
353 | # ifdef HAVE_REVOKE |
|
|
354 | revoke (name); |
|
|
355 | # endif |
|
|
356 | } |
|
|
357 | } |
|
|
358 | else |
|
|
359 | { /* action == RESTORE */ |
|
|
360 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
|
|
361 | if (saved) |
|
|
362 | { |
|
|
363 | chmod (name, savestat.st_mode); |
|
|
364 | chown (name, savestat.st_uid, savestat.st_gid); |
|
|
365 | } |
|
|
366 | # else |
|
|
367 | chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
|
|
368 | chown (name, 0, 0); |
|
|
369 | # endif |
|
|
370 | |
339 | |
371 | } |
340 | free (name); |
372 | |
341 | |
373 | rxvt_privileges (IGNORE); |
|
|
374 | } |
|
|
375 | #endif |
|
|
376 | |
|
|
377 | rxvt_ptytty::rxvt_ptytty () |
|
|
378 | { |
|
|
379 | pty = tty = -1; |
342 | pty = tty = -1; |
380 | name = 0; |
343 | name = 0; |
381 | #ifndef NO_SETOWNER_TTYDEV |
|
|
382 | saved = false; |
|
|
383 | #endif |
|
|
384 | } |
|
|
385 | |
|
|
386 | rxvt_ptytty::~rxvt_ptytty () |
|
|
387 | { |
|
|
388 | put (); |
|
|
389 | } |
|
|
390 | |
|
|
391 | void |
|
|
392 | |
|
|
393 | rxvt_ptytty::close_tty () |
|
|
394 | { |
|
|
395 | if (tty < 0) |
|
|
396 | return; |
|
|
397 | |
|
|
398 | close (tty); |
|
|
399 | tty = -1; |
|
|
400 | } |
|
|
401 | |
|
|
402 | void |
|
|
403 | rxvt_ptytty::put () |
|
|
404 | { |
|
|
405 | #ifndef NO_SETOWNER_TTYDEV |
|
|
406 | privileges (RESTORE); |
|
|
407 | #endif |
|
|
408 | |
|
|
409 | if (pty >= 0) close (pty); |
|
|
410 | close_tty (); |
|
|
411 | free (name); |
|
|
412 | |
|
|
413 | pty = tty = -1; |
|
|
414 | name = 0; |
|
|
415 | } |
344 | } |
416 | |
345 | |
417 | bool |
346 | bool |
418 | rxvt_ptytty::make_controlling_tty () |
347 | ptytty_unix::get () |
419 | { |
|
|
420 | return control_tty (tty, name) >= 0; |
|
|
421 | } |
|
|
422 | |
|
|
423 | bool |
|
|
424 | rxvt_ptytty::get () |
|
|
425 | { |
348 | { |
426 | /* get master (pty) */ |
349 | /* get master (pty) */ |
427 | if ((pty = get_pty (&tty, &name)) < 0) |
350 | if ((pty = get_pty (&tty, &name)) < 0) |
428 | return false; |
351 | return false; |
429 | |
352 | |
… | |
… | |
431 | |
354 | |
432 | /* get slave (tty) */ |
355 | /* get slave (tty) */ |
433 | if (tty < 0) |
356 | if (tty < 0) |
434 | { |
357 | { |
435 | #ifndef NO_SETOWNER_TTYDEV |
358 | #ifndef NO_SETOWNER_TTYDEV |
436 | privileges (SAVE); |
359 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
360 | chmod (name, ttyconf.mode); |
|
|
361 | # ifdef HAVE_REVOKE |
|
|
362 | revoke (name); |
|
|
363 | # endif |
437 | #endif |
364 | #endif |
438 | |
365 | |
439 | if ((tty = get_tty (name)) < 0) |
366 | if ((tty = get_tty (name)) < 0) |
440 | { |
367 | { |
441 | put (); |
368 | put (); |
… | |
… | |
444 | } |
371 | } |
445 | |
372 | |
446 | return true; |
373 | return true; |
447 | } |
374 | } |
448 | |
375 | |
|
|
376 | #if PTYTTY_HELPER |
|
|
377 | |
|
|
378 | static int sock_fd = -1; |
|
|
379 | static int helper_pid, owner_pid; |
|
|
380 | |
|
|
381 | struct command |
|
|
382 | { |
|
|
383 | enum { get, login, destroy } type; |
|
|
384 | |
|
|
385 | ptytty *id; |
|
|
386 | |
|
|
387 | bool login_shell; |
|
|
388 | int cmd_pid; |
|
|
389 | char hostname[512]; // arbitrary, but should be plenty |
|
|
390 | }; |
|
|
391 | |
|
|
392 | struct ptytty_proxy : ptytty |
|
|
393 | { |
|
|
394 | ptytty *id; |
|
|
395 | |
|
|
396 | ptytty_proxy () |
|
|
397 | : id(0) |
|
|
398 | { |
|
|
399 | } |
|
|
400 | |
|
|
401 | ~ptytty_proxy (); |
|
|
402 | |
|
|
403 | bool get (); |
|
|
404 | void login (int cmd_pid, bool login_shell, const char *hostname); |
|
|
405 | }; |
|
|
406 | |
|
|
407 | bool |
|
|
408 | ptytty_proxy::get () |
|
|
409 | { |
|
|
410 | command cmd; |
|
|
411 | |
|
|
412 | cmd.type = command::get; |
|
|
413 | |
|
|
414 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
415 | |
|
|
416 | if (read (sock_fd, &id, sizeof (id)) != sizeof (id)) |
|
|
417 | ptytty_fatal ("protocol error while creating pty using helper process, aborting.\n"); |
|
|
418 | |
|
|
419 | if (!id) |
|
|
420 | return false; |
|
|
421 | |
|
|
422 | if ((pty = recv_fd (sock_fd)) < 0 |
|
|
423 | || (tty = recv_fd (sock_fd)) < 0) |
|
|
424 | ptytty_fatal ("protocol error while reading pty/tty fds from helper process, aborting.\n"); |
|
|
425 | |
|
|
426 | return true; |
|
|
427 | } |
|
|
428 | |
449 | void |
429 | void |
450 | rxvt_ptytty::set_utf8_mode (bool on) |
430 | ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
451 | { |
431 | { |
452 | #ifdef IUTF8 |
432 | command cmd; |
453 | if (pty < 0) |
433 | |
|
|
434 | cmd.type = command::login; |
|
|
435 | cmd.id = id; |
|
|
436 | cmd.cmd_pid = cmd_pid; |
|
|
437 | cmd.login_shell = login_shell; |
|
|
438 | strncpy (cmd.hostname, hostname, sizeof (cmd.hostname)); |
|
|
439 | |
|
|
440 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
441 | } |
|
|
442 | |
|
|
443 | ptytty_proxy::~ptytty_proxy () |
|
|
444 | { |
|
|
445 | if (id) |
|
|
446 | { |
|
|
447 | command cmd; |
|
|
448 | |
|
|
449 | cmd.type = command::destroy; |
|
|
450 | cmd.id = id; |
|
|
451 | |
|
|
452 | write (sock_fd, &cmd, sizeof (cmd)); |
|
|
453 | } |
|
|
454 | } |
|
|
455 | |
|
|
456 | static |
|
|
457 | void serve () |
|
|
458 | { |
|
|
459 | command cmd; |
|
|
460 | vector<ptytty *> ptys; |
|
|
461 | |
|
|
462 | while (read (sock_fd, &cmd, sizeof (command)) == sizeof (command)) |
|
|
463 | { |
|
|
464 | if (cmd.type == command::get) |
|
|
465 | { |
|
|
466 | // -> id ptyfd ttyfd |
|
|
467 | cmd.id = new ptytty_unix; |
|
|
468 | |
|
|
469 | if (cmd.id->get ()) |
|
|
470 | { |
|
|
471 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
472 | ptys.push_back (cmd.id); |
|
|
473 | |
|
|
474 | ptytty::send_fd (sock_fd, cmd.id->pty); |
|
|
475 | ptytty::send_fd (sock_fd, cmd.id->tty); |
|
|
476 | } |
|
|
477 | else |
|
|
478 | { |
|
|
479 | delete cmd.id; |
|
|
480 | cmd.id = 0; |
|
|
481 | write (sock_fd, &cmd.id, sizeof (cmd.id)); |
|
|
482 | } |
|
|
483 | } |
|
|
484 | else if (cmd.type == command::login) |
|
|
485 | { |
|
|
486 | #if UTMP_SUPPORT |
|
|
487 | if (find (ptys.begin (), ptys.end (), cmd.id)) |
|
|
488 | { |
|
|
489 | cmd.hostname[sizeof (cmd.hostname) - 1] = 0; |
|
|
490 | cmd.id->login (cmd.cmd_pid, cmd.login_shell, cmd.hostname); |
|
|
491 | } |
|
|
492 | #endif |
|
|
493 | } |
|
|
494 | else if (cmd.type == command::destroy) |
|
|
495 | { |
|
|
496 | vector<ptytty *>::iterator pty = find (ptys.begin (), ptys.end (), cmd.id); |
|
|
497 | |
|
|
498 | if (pty != ptys.end ()) |
|
|
499 | { |
|
|
500 | delete *pty; |
|
|
501 | ptys.erase (pty); |
|
|
502 | } |
|
|
503 | } |
|
|
504 | else |
|
|
505 | break; |
|
|
506 | } |
|
|
507 | |
|
|
508 | // destroy all ptys |
|
|
509 | for (vector<ptytty *>::iterator i = ptys.end (); i-- > ptys.begin (); ) |
|
|
510 | delete *i; |
|
|
511 | } |
|
|
512 | |
|
|
513 | void |
|
|
514 | ptytty::use_helper () |
|
|
515 | { |
|
|
516 | int pid = getpid (); |
|
|
517 | |
|
|
518 | if (sock_fd >= 0 && pid == owner_pid) |
454 | return; |
519 | return; |
455 | |
520 | |
456 | struct termios tio; |
521 | owner_pid = pid; |
457 | |
522 | |
458 | if (tcgetattr (pty, &tio) != -1) |
523 | int sv[2]; |
459 | { |
|
|
460 | tcflag_t new_cflag = tio.c_iflag; |
|
|
461 | |
524 | |
462 | if (on) |
525 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
463 | new_cflag |= IUTF8; |
526 | ptytty_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
464 | else |
|
|
465 | new_cflag &= ~IUTF8; |
|
|
466 | |
527 | |
467 | if (new_cflag != tio.c_iflag) |
528 | helper_pid = fork (); |
468 | { |
529 | |
469 | tio.c_iflag = new_cflag; |
530 | if (helper_pid < 0) |
470 | tcsetattr (pty, TCSANOW, &tio); |
531 | ptytty_fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
471 | } |
532 | |
|
|
533 | if (helper_pid) |
472 | } |
534 | { |
473 | #endif |
535 | // client, process |
474 | } |
536 | sock_fd = sv[0]; |
|
|
537 | close (sv[1]); |
|
|
538 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
|
|
539 | } |
|
|
540 | else |
|
|
541 | { |
|
|
542 | // server, pty-helper |
|
|
543 | sock_fd = sv[1]; |
475 | |
544 | |
476 | /*----------------------- end-of-file (C source) -----------------------*/ |
545 | chdir ("/"); |
477 | |
546 | |
|
|
547 | for (int fd = 0; fd < 1023; fd++) |
|
|
548 | if (fd != sock_fd) |
|
|
549 | close (fd); |
|
|
550 | |
|
|
551 | serve (); |
|
|
552 | _exit (EXIT_SUCCESS); |
|
|
553 | } |
|
|
554 | } |
|
|
555 | |
|
|
556 | #endif |
|
|
557 | |
|
|
558 | ptytty * |
|
|
559 | ptytty::create () |
|
|
560 | { |
|
|
561 | #if PTYTTY_HELPER |
|
|
562 | if (helper_pid && getpid () == owner_pid) |
|
|
563 | // use helper process |
|
|
564 | return new ptytty_proxy; |
|
|
565 | else |
|
|
566 | #endif |
|
|
567 | return new ptytty_unix; |
|
|
568 | } |
|
|
569 | |
|
|
570 | void |
|
|
571 | ptytty::init () |
|
|
572 | { |
|
|
573 | uid_t uid = getuid (); |
|
|
574 | gid_t gid = getgid (); |
|
|
575 | |
|
|
576 | // before doing anything else, check for setuid/setgid operation, |
|
|
577 | // start the helper process and drop privileges |
|
|
578 | if (uid != geteuid () |
|
|
579 | || gid != getegid ()) |
|
|
580 | { |
|
|
581 | #if PTYTTY_HELPER |
|
|
582 | use_helper (); |
|
|
583 | #else |
|
|
584 | ptytty_warn ("running setuid/setgid without pty helper compiled in, continuing unprivileged.\n"); |
|
|
585 | #endif |
|
|
586 | |
|
|
587 | drop_privileges (); |
|
|
588 | } |
|
|
589 | } |
|
|
590 | |
|
|
591 | void |
|
|
592 | ptytty::drop_privileges () |
|
|
593 | { |
|
|
594 | uid_t uid = getuid (); |
|
|
595 | gid_t gid = getgid (); |
|
|
596 | |
|
|
597 | // drop privileges |
|
|
598 | #if HAVE_SETRESUID |
|
|
599 | setresgid (gid, gid, gid); |
|
|
600 | setresuid (uid, uid, uid); |
|
|
601 | #elif HAVE_SETREUID |
|
|
602 | setregid (gid, gid); |
|
|
603 | setreuid (uid, uid); |
|
|
604 | #elif HAVE_SETUID |
|
|
605 | setgid (gid); |
|
|
606 | setuid (uid); |
|
|
607 | #endif |
|
|
608 | |
|
|
609 | if (uid != geteuid () |
|
|
610 | || gid != getegid ()) |
|
|
611 | ptytty_fatal ("unable to drop privileges, aborting.\n"); |
|
|
612 | } |
|
|
613 | |