… | |
… | |
33 | #include <fcntl.h> |
33 | #include <fcntl.h> |
34 | |
34 | |
35 | #ifdef HAVE_SYS_IOCTL_H |
35 | #ifdef HAVE_SYS_IOCTL_H |
36 | # include <sys/ioctl.h> |
36 | # include <sys/ioctl.h> |
37 | #endif |
37 | #endif |
38 | #if defined(PTYS_ARE_PTMX) && defined(HAVE_SYS_STROPTS_H) |
38 | #if defined(HAVE_DEV_PTMX) && defined(HAVE_SYS_STROPTS_H) |
39 | # include <sys/stropts.h> /* for I_PUSH */ |
39 | # include <sys/stropts.h> /* for I_PUSH */ |
40 | #endif |
40 | #endif |
41 | #ifdef HAVE_ISASTREAM |
41 | #ifdef HAVE_ISASTREAM |
42 | # include <stropts.h> |
42 | # include <stropts.h> |
43 | #endif |
43 | #endif |
… | |
… | |
46 | #elif defined(HAVE_LIBUTIL_H) |
46 | #elif defined(HAVE_LIBUTIL_H) |
47 | # include <libutil.h> |
47 | # include <libutil.h> |
48 | #elif defined(HAVE_UTIL_H) |
48 | #elif defined(HAVE_UTIL_H) |
49 | # include <util.h> |
49 | # include <util.h> |
50 | #endif |
50 | #endif |
|
|
51 | #ifdef TTY_GID_SUPPORT |
|
|
52 | #include <grp.h> |
|
|
53 | #endif |
51 | |
54 | |
52 | #include <cstdio> |
55 | #include <cstdio> |
53 | #include <grp.h> |
|
|
54 | |
56 | |
55 | #include "rxvtutil.h" |
57 | #include "rxvtutil.h" |
56 | #include "fdpass.h" |
58 | #include "fdpass.h" |
57 | #include "ptytty.h" |
59 | #include "ptytty.h" |
58 | |
60 | |
… | |
… | |
64 | /* |
66 | /* |
65 | * Returns pty file descriptor, or -1 on failure |
67 | * Returns pty file descriptor, or -1 on failure |
66 | * If successful, ttydev is set to the name of the slave device. |
68 | * If successful, ttydev is set to the name of the slave device. |
67 | * fd_tty _may_ also be set to an open fd to the slave device |
69 | * fd_tty _may_ also be set to an open fd to the slave device |
68 | */ |
70 | */ |
|
|
71 | #if defined(UNIX98_PTY) |
69 | static int |
72 | static int |
70 | get_pty (int *fd_tty, char **ttydev) |
73 | get_pty (int *fd_tty, char **ttydev) |
71 | { |
74 | { |
72 | int pfd; |
75 | int pfd; |
73 | |
76 | |
74 | #ifdef PTYS_ARE_OPENPTY |
77 | # if defined(HAVE_GETPT) |
75 | char tty_name[sizeof "/dev/pts/????\0"]; |
78 | pfd = getpt(); |
|
|
79 | # elif defined(HAVE_POSIX_OPENPT) |
|
|
80 | pfd = posix_openpt (O_RDWR); |
|
|
81 | # else |
|
|
82 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
|
|
83 | # endif |
|
|
84 | if (pfd >= 0) |
|
|
85 | { |
|
|
86 | if (grantpt (pfd) == 0 /* change slave permissions */ |
|
|
87 | && unlockpt (pfd) == 0) |
|
|
88 | { /* slave now unlocked */ |
|
|
89 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
|
|
90 | return pfd; |
|
|
91 | } |
76 | |
92 | |
|
|
93 | close (pfd); |
|
|
94 | } |
|
|
95 | |
|
|
96 | return -1; |
|
|
97 | } |
|
|
98 | #elif defined(HAVE_OPENPTY) |
|
|
99 | static int |
|
|
100 | get_pty (int *fd_tty, char **ttydev) |
|
|
101 | { |
|
|
102 | int pfd; |
|
|
103 | int res; |
|
|
104 | char tty_name[32]; |
|
|
105 | |
77 | int res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
106 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
78 | |
|
|
79 | if (res != -1) |
107 | if (res != -1) |
80 | { |
108 | { |
81 | *ttydev = strdup (tty_name); |
109 | *ttydev = strdup (tty_name); |
82 | return pfd; |
110 | return pfd; |
83 | } |
111 | } |
84 | #endif |
|
|
85 | |
112 | |
86 | #ifdef PTYS_ARE__GETPTY |
113 | return -1; |
|
|
114 | } |
|
|
115 | #elif defined(HAVE__GETPTY) |
|
|
116 | static int |
|
|
117 | get_pty (int *fd_tty, char **ttydev) |
|
|
118 | { |
|
|
119 | int pfd; |
|
|
120 | |
87 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
121 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
88 | if (*ttydev != NULL) |
122 | if (*ttydev != NULL) |
89 | return pfd; |
123 | return pfd; |
90 | #endif |
|
|
91 | |
124 | |
92 | #if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) |
125 | return -1; |
93 | # if defined(PTYS_ARE_GETPT) || defined(PTYS_ARE_POSIX) || defined(PTYS_ARE_PTMX) |
126 | } |
|
|
127 | #elif defined(HAVE_DEV_PTC) |
|
|
128 | static int |
|
|
129 | get_pty (int *fd_tty, char **ttydev) |
|
|
130 | { |
|
|
131 | int pfd; |
94 | |
132 | |
95 | { |
|
|
96 | # ifdef PTYS_ARE_GETPT |
|
|
97 | pfd = getpt(); |
|
|
98 | # else |
|
|
99 | # ifdef PTYS_ARE_POSIX |
|
|
100 | pfd = posix_openpt (O_RDWR); |
|
|
101 | # else |
|
|
102 | pfd = open ("/dev/ptmx", O_RDWR | O_NOCTTY, 0); |
|
|
103 | # endif |
|
|
104 | # endif |
|
|
105 | |
|
|
106 | if (pfd >= 0) |
|
|
107 | { |
|
|
108 | if (grantpt (pfd) == 0 /* change slave permissions */ |
|
|
109 | && unlockpt (pfd) == 0) |
|
|
110 | { /* slave now unlocked */ |
|
|
111 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
|
|
112 | return pfd; |
|
|
113 | } |
|
|
114 | close (pfd); |
|
|
115 | } |
|
|
116 | } |
|
|
117 | # endif |
|
|
118 | #endif |
|
|
119 | |
|
|
120 | #ifdef PTYS_ARE_PTC |
|
|
121 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
133 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
122 | { |
134 | { |
123 | *ttydev = strdup (ttyname (pfd)); |
135 | *ttydev = strdup (ttyname (pfd)); |
124 | return pfd; |
136 | return pfd; |
125 | } |
137 | } |
126 | #endif |
|
|
127 | |
138 | |
128 | #ifdef PTYS_ARE_CLONE |
139 | return -1; |
|
|
140 | } |
|
|
141 | #elif defined(HAVE_DEV_CLONE) |
|
|
142 | static int |
|
|
143 | get_pty (int *fd_tty, char **ttydev) |
|
|
144 | { |
|
|
145 | int pfd; |
|
|
146 | |
129 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
147 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
130 | { |
148 | { |
131 | *ttydev = strdup (ptsname (pfd)); |
149 | *ttydev = strdup (ptsname (pfd)); |
132 | return pfd; |
150 | return pfd; |
133 | } |
151 | } |
134 | #endif |
|
|
135 | |
|
|
136 | #ifdef PTYS_ARE_NUMERIC |
|
|
137 | { |
|
|
138 | int idx; |
|
|
139 | char *c1, *c2; |
|
|
140 | char pty_name[] = "/dev/ptyp???"; |
|
|
141 | char tty_name[] = "/dev/ttyp???"; |
|
|
142 | |
|
|
143 | c1 = &(pty_name[sizeof (pty_name) - 4]); |
|
|
144 | c2 = &(tty_name[sizeof (tty_name) - 4]); |
|
|
145 | for (idx = 0; idx < 256; idx++) |
|
|
146 | { |
|
|
147 | sprintf (c1, "%d", idx); |
|
|
148 | sprintf (c2, "%d", idx); |
|
|
149 | if (access (tty_name, F_OK) < 0) |
|
|
150 | { |
|
|
151 | idx = 256; |
|
|
152 | break; |
|
|
153 | } |
|
|
154 | |
|
|
155 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
156 | { |
|
|
157 | if (access (tty_name, R_OK | W_OK) == 0) |
|
|
158 | { |
|
|
159 | *ttydev = strdup (tty_name); |
|
|
160 | return pfd; |
|
|
161 | } |
|
|
162 | |
|
|
163 | close (pfd); |
|
|
164 | } |
|
|
165 | } |
|
|
166 | } |
|
|
167 | #endif |
|
|
168 | |
|
|
169 | #ifdef PTYS_ARE_SEARCHED |
|
|
170 | { |
|
|
171 | const char *c1, *c2; |
|
|
172 | char pty_name[] = "/dev/pty??"; |
|
|
173 | char tty_name[] = "/dev/tty??"; |
|
|
174 | |
|
|
175 | # ifndef PTYCHAR1 |
|
|
176 | # define PTYCHAR1 "pqrstuvwxyz" |
|
|
177 | # endif |
|
|
178 | # ifndef PTYCHAR2 |
|
|
179 | # define PTYCHAR2 "0123456789abcdef" |
|
|
180 | # endif |
|
|
181 | |
|
|
182 | for (c1 = PTYCHAR1; *c1; c1++) |
|
|
183 | { |
|
|
184 | pty_name[ (sizeof (pty_name) - 3)] = |
|
|
185 | tty_name[ (sizeof (pty_name) - 3)] = *c1; |
|
|
186 | for (c2 = PTYCHAR2; *c2; c2++) |
|
|
187 | { |
|
|
188 | pty_name[ (sizeof (pty_name) - 2)] = |
|
|
189 | tty_name[ (sizeof (pty_name) - 2)] = *c2; |
|
|
190 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) >= 0) |
|
|
191 | { |
|
|
192 | if (access (tty_name, R_OK | W_OK) == 0) |
|
|
193 | { |
|
|
194 | *ttydev = strdup (tty_name); |
|
|
195 | return pfd; |
|
|
196 | } |
|
|
197 | |
|
|
198 | close (pfd); |
|
|
199 | } |
|
|
200 | } |
|
|
201 | } |
|
|
202 | } |
|
|
203 | #endif |
|
|
204 | |
152 | |
205 | return -1; |
153 | return -1; |
206 | } |
154 | } |
|
|
155 | #else |
|
|
156 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
|
|
157 | static int |
|
|
158 | get_pty (int *fd_tty, char **ttydev) |
|
|
159 | { |
|
|
160 | int pfd; |
|
|
161 | int i; |
|
|
162 | char pty_name[32]; |
|
|
163 | char tty_name[32]; |
|
|
164 | const char *majors = "pqrstuvwxyzabcde"; |
|
|
165 | const char *minors = "0123456789abcdef"; |
|
|
166 | for (i = 0; i < 256; i++) |
|
|
167 | { |
|
|
168 | snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
|
|
169 | snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
|
|
170 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
|
|
171 | { |
|
|
172 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
|
|
173 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
|
|
174 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
|
|
175 | continue; |
|
|
176 | } |
|
|
177 | if (access (tty_name, R_OK | W_OK) == 0) |
|
|
178 | { |
|
|
179 | *ttydev = strdup (tty_name); |
|
|
180 | return pfd; |
|
|
181 | } |
|
|
182 | |
|
|
183 | close (pfd); |
|
|
184 | } |
|
|
185 | } |
|
|
186 | #endif |
207 | |
187 | |
208 | /*----------------------------------------------------------------------*/ |
188 | /*----------------------------------------------------------------------*/ |
209 | /* |
189 | /* |
210 | * Returns tty file descriptor, or -1 on failure |
190 | * Returns tty file descriptor, or -1 on failure |
211 | */ |
191 | */ |
… | |
… | |
220 | * Make our tty a controlling tty so that /dev/tty points to us |
200 | * Make our tty a controlling tty so that /dev/tty points to us |
221 | */ |
201 | */ |
222 | static int |
202 | static int |
223 | control_tty (int fd_tty) |
203 | control_tty (int fd_tty) |
224 | { |
204 | { |
225 | int fd; |
|
|
226 | |
|
|
227 | /* ---------------------------------------- */ |
|
|
228 | setsid (); |
205 | setsid (); |
229 | |
206 | |
230 | /* ---------------------------------------- */ |
|
|
231 | # if defined(PTYS_ARE_PTMX) && defined(I_PUSH) |
207 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
232 | /* |
208 | /* |
233 | * Push STREAMS modules: |
209 | * Push STREAMS modules: |
234 | * ptem: pseudo-terminal hardware emulation module. |
210 | * ptem: pseudo-terminal hardware emulation module. |
235 | * ldterm: standard terminal line discipline. |
211 | * ldterm: standard terminal line discipline. |
236 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
212 | * ttcompat: V7, 4BSD and XENIX STREAMS compatibility module. |
… | |
… | |
244 | * documentation is really unclear about whether it is any close () on |
220 | * documentation is really unclear about whether it is any close () on |
245 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
221 | * the master side or the last close () - i.e. a proper STREAMS dismantling |
246 | * close () - on the master side which causes a hang up to be sent |
222 | * close () - on the master side which causes a hang up to be sent |
247 | * through - Geoff Wing |
223 | * through - Geoff Wing |
248 | */ |
224 | */ |
249 | # ifdef HAVE_ISASTREAM |
225 | # ifdef HAVE_ISASTREAM |
250 | if (isastream (fd_tty) == 1) |
226 | if (isastream (fd_tty) == 1) |
251 | # endif |
227 | # endif |
252 | { |
228 | { |
253 | ioctl (fd_tty, I_PUSH, "ptem"); |
229 | ioctl (fd_tty, I_PUSH, "ptem"); |
254 | ioctl (fd_tty, I_PUSH, "ldterm"); |
230 | ioctl (fd_tty, I_PUSH, "ldterm"); |
255 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
231 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
256 | } |
232 | } |
257 | # endif |
233 | #endif |
258 | /* ---------------------------------------- */ |
234 | |
259 | fd = ioctl (fd_tty, TIOCSCTTY, NULL); |
235 | ioctl (fd_tty, TIOCSCTTY, NULL); |
260 | /* ---------------------------------------- */ |
236 | |
261 | fd = open ("/dev/tty", O_WRONLY); |
237 | int fd = open ("/dev/tty", O_WRONLY); |
262 | if (fd < 0) |
238 | if (fd < 0) |
263 | return -1; /* fatal */ |
239 | return -1; /* fatal */ |
|
|
240 | |
264 | close (fd); |
241 | close (fd); |
265 | /* ---------------------------------------- */ |
|
|
266 | |
242 | |
267 | return 0; |
243 | return 0; |
268 | } |
244 | } |
269 | |
245 | |
270 | void |
246 | void |
… | |
… | |
308 | } |
284 | } |
309 | } |
285 | } |
310 | #endif |
286 | #endif |
311 | } |
287 | } |
312 | |
288 | |
313 | ///////////////////////////////////////////////////////////////////////////// |
|
|
314 | |
|
|
315 | #ifndef NO_SETOWNER_TTYDEV |
|
|
316 | static struct ttyconf { |
289 | static struct ttyconf { |
317 | gid_t gid; |
290 | gid_t gid; |
318 | mode_t mode; |
291 | mode_t mode; |
319 | |
292 | |
320 | ttyconf () |
293 | ttyconf () |
… | |
… | |
329 | } |
302 | } |
330 | else |
303 | else |
331 | #endif /* TTY_GID_SUPPORT */ |
304 | #endif /* TTY_GID_SUPPORT */ |
332 | { |
305 | { |
333 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
306 | mode = S_IRUSR | S_IWUSR | S_IWGRP | S_IWOTH; |
334 | gid = getgid (); |
307 | gid = 0; |
335 | } |
308 | } |
336 | } |
309 | } |
337 | } ttyconf; |
310 | } ttyconf; |
338 | |
311 | |
339 | ///////////////////////////////////////////////////////////////////////////// |
|
|
340 | |
|
|
341 | void |
|
|
342 | rxvt_ptytty_unix::privileges (rxvt_privaction action) |
|
|
343 | { |
|
|
344 | if (!name || !*name) |
|
|
345 | return; |
|
|
346 | |
|
|
347 | if (action == SAVE) |
|
|
348 | { |
|
|
349 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
|
|
350 | /* store original tty status for restoration rxvt_clean_exit () -- rgg 04/12/95 */ |
|
|
351 | if (lstat (name, &savestat) < 0) /* you lose out */ |
|
|
352 | ; |
|
|
353 | else |
|
|
354 | # endif |
|
|
355 | { |
|
|
356 | saved = true; |
|
|
357 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
358 | chmod (name, ttyconf.mode); |
|
|
359 | # ifdef HAVE_REVOKE |
|
|
360 | revoke (name); |
|
|
361 | # endif |
|
|
362 | } |
|
|
363 | } |
|
|
364 | else |
|
|
365 | { /* action == RESTORE */ |
|
|
366 | # ifndef RESET_TTY_TO_COMMON_DEFAULTS |
|
|
367 | if (saved) |
|
|
368 | { |
|
|
369 | chmod (name, savestat.st_mode); |
|
|
370 | chown (name, savestat.st_uid, savestat.st_gid); |
|
|
371 | } |
|
|
372 | # else |
|
|
373 | chmod (name, (S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH)); |
|
|
374 | chown (name, 0, 0); |
|
|
375 | # endif |
|
|
376 | |
|
|
377 | } |
|
|
378 | } |
|
|
379 | #endif |
|
|
380 | |
|
|
381 | rxvt_ptytty_unix::rxvt_ptytty_unix () |
312 | rxvt_ptytty_unix::rxvt_ptytty_unix () |
382 | { |
313 | { |
383 | pty = tty = -1; |
|
|
384 | name = 0; |
314 | name = 0; |
385 | #ifndef NO_SETOWNER_TTYDEV |
|
|
386 | saved = false; |
|
|
387 | #endif |
|
|
388 | #if UTMP_SUPPORT |
315 | #if UTMP_SUPPORT |
389 | cmd_pid = 0; |
316 | cmd_pid = 0; |
390 | #endif |
317 | #endif |
391 | } |
318 | } |
392 | |
319 | |
… | |
… | |
399 | } |
326 | } |
400 | |
327 | |
401 | void |
328 | void |
402 | rxvt_ptytty_unix::put () |
329 | rxvt_ptytty_unix::put () |
403 | { |
330 | { |
404 | #ifndef NO_SETOWNER_TTYDEV |
331 | chmod (name, RESTORE_TTY_MODE); |
405 | privileges (RESTORE); |
332 | chown (name, 0, ttyconf.gid); |
406 | #endif |
|
|
407 | |
333 | |
408 | if (pty >= 0) close (pty); |
|
|
409 | close_tty (); |
334 | close_tty (); |
|
|
335 | |
|
|
336 | if (pty >= 0) |
|
|
337 | close (pty); |
|
|
338 | |
410 | free (name); |
339 | free (name); |
411 | |
340 | |
412 | pty = tty = -1; |
341 | pty = tty = -1; |
413 | name = 0; |
342 | name = 0; |
414 | } |
343 | } |
… | |
… | |
424 | |
353 | |
425 | /* get slave (tty) */ |
354 | /* get slave (tty) */ |
426 | if (tty < 0) |
355 | if (tty < 0) |
427 | { |
356 | { |
428 | #ifndef NO_SETOWNER_TTYDEV |
357 | #ifndef NO_SETOWNER_TTYDEV |
429 | privileges (SAVE); |
358 | chown (name, getuid (), ttyconf.gid); /* fail silently */ |
|
|
359 | chmod (name, ttyconf.mode); |
|
|
360 | # ifdef HAVE_REVOKE |
|
|
361 | revoke (name); |
|
|
362 | # endif |
430 | #endif |
363 | #endif |
431 | |
364 | |
432 | if ((tty = get_tty (name)) < 0) |
365 | if ((tty = get_tty (name)) < 0) |
433 | { |
366 | { |
434 | put (); |
367 | put (); |
… | |
… | |
587 | close (sv[1]); |
520 | close (sv[1]); |
588 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
521 | fcntl (sock_fd, F_SETFD, FD_CLOEXEC); |
589 | } |
522 | } |
590 | else |
523 | else |
591 | { |
524 | { |
592 | setgid (getegid ()); |
|
|
593 | setuid (geteuid ()); |
|
|
594 | |
|
|
595 | // server, pty-helper |
525 | // server, pty-helper |
596 | sock_fd = sv[1]; |
526 | sock_fd = sv[1]; |
597 | |
527 | |
598 | for (int fd = 0; fd < 1023; fd++) |
528 | for (int fd = 0; fd < 1023; fd++) |
599 | if (fd != sock_fd && fd != 1) |
529 | if (fd != sock_fd) |
600 | close (fd); |
530 | close (fd); |
601 | |
531 | |
602 | serve (); |
532 | serve (); |
603 | _exit (EXIT_SUCCESS); |
533 | _exit (EXIT_SUCCESS); |
604 | } |
534 | } |
605 | } |
535 | } |
|
|
536 | |
606 | #endif |
537 | #endif |
607 | |
538 | |
608 | // a "factory" *g* |
539 | // a "factory" *g* |
609 | rxvt_ptytty * |
540 | rxvt_ptytty * |
610 | rxvt_new_ptytty () |
541 | rxvt_new_ptytty () |