… | |
… | |
6 | *----------------------------------------------------------------------* |
6 | *----------------------------------------------------------------------* |
7 | * |
7 | * |
8 | * All portions of code are copyright by their respective author/s. |
8 | * All portions of code are copyright by their respective author/s. |
9 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
9 | * Copyright (c) 1999-2001 Geoff Wing <gcw@pobox.com> |
10 | * 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> |
11 | * Copyright (c) 2006 Emanuele Giaquinta <e.giaquinta@glauco.it> |
12 | * |
12 | * |
13 | * 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 |
14 | * 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 |
15 | * the Free Software Foundation; either version 2 of the License, or |
15 | * the Free Software Foundation; either version 2 of the License, or |
16 | * (at your option) any later version. |
16 | * (at your option) any later version. |
… | |
… | |
29 | |
29 | |
30 | #include "ptytty.h" |
30 | #include "ptytty.h" |
31 | |
31 | |
32 | #include <cstdlib> |
32 | #include <cstdlib> |
33 | #include <cstring> |
33 | #include <cstring> |
|
|
34 | #include <csignal> |
34 | |
35 | |
35 | #include <sys/types.h> |
36 | #include <sys/types.h> |
36 | #include <sys/socket.h> |
|
|
37 | #include <unistd.h> |
37 | #include <unistd.h> |
38 | #include <fcntl.h> |
38 | #include <fcntl.h> |
39 | |
39 | |
40 | #ifdef HAVE_SYS_IOCTL_H |
40 | #ifdef HAVE_SYS_IOCTL_H |
41 | # include <sys/ioctl.h> |
41 | # include <sys/ioctl.h> |
… | |
… | |
63 | |
63 | |
64 | /* ------------------------------------------------------------------------- * |
64 | /* ------------------------------------------------------------------------- * |
65 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
65 | * GET PSEUDO TELETYPE - MASTER AND SLAVE * |
66 | * ------------------------------------------------------------------------- */ |
66 | * ------------------------------------------------------------------------- */ |
67 | /* |
67 | /* |
68 | * Returns pty file descriptor, or -1 on failure |
68 | * Returns pty file descriptor, or -1 on failure |
69 | * 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. |
70 | * 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 |
71 | */ |
71 | */ |
72 | #if defined(UNIX98_PTY) |
72 | #if defined(UNIX98_PTY) |
|
|
73 | |
73 | static int |
74 | static int |
74 | get_pty (int *fd_tty, char **ttydev) |
75 | get_pty (int *fd_tty, char **ttydev) |
75 | { |
76 | { |
76 | int pfd; |
77 | int pfd; |
77 | |
78 | |
78 | # if defined(HAVE_GETPT) |
79 | # if defined(HAVE_GETPT) |
79 | pfd = getpt(); |
80 | pfd = getpt(); |
80 | # elif defined(HAVE_POSIX_OPENPT) |
81 | # elif defined(HAVE_POSIX_OPENPT) |
81 | pfd = posix_openpt (O_RDWR); |
82 | pfd = posix_openpt (O_RDWR); |
82 | # else |
83 | # else |
83 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
84 | pfd = open (CLONE_DEVICE, O_RDWR | O_NOCTTY, 0); |
84 | # endif |
85 | # endif |
|
|
86 | |
85 | if (pfd >= 0) |
87 | if (pfd >= 0) |
86 | { |
88 | { |
87 | if (grantpt (pfd) == 0 /* change slave permissions */ |
89 | if (grantpt (pfd) == 0 /* change slave permissions */ |
88 | && unlockpt (pfd) == 0) |
90 | && unlockpt (pfd) == 0) |
89 | { /* slave now unlocked */ |
91 | { /* slave now unlocked */ |
90 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
92 | *ttydev = strdup (ptsname (pfd)); /* get slave's name */ |
91 | return pfd; |
93 | return pfd; |
92 | } |
94 | } |
93 | |
95 | |
94 | close (pfd); |
96 | close (pfd); |
95 | } |
97 | } |
96 | |
98 | |
97 | return -1; |
99 | return -1; |
98 | } |
100 | } |
|
|
101 | |
99 | #elif defined(HAVE_OPENPTY) |
102 | #elif defined(HAVE_OPENPTY) |
|
|
103 | |
100 | static int |
104 | static int |
101 | get_pty (int *fd_tty, char **ttydev) |
105 | get_pty (int *fd_tty, char **ttydev) |
102 | { |
106 | { |
103 | int pfd; |
107 | int pfd; |
104 | int res; |
108 | int res; |
105 | char tty_name[32]; |
109 | |
106 | |
|
|
107 | res = openpty (&pfd, fd_tty, tty_name, NULL, NULL); |
110 | res = openpty (&pfd, fd_tty, NULL, NULL, NULL); |
|
|
111 | |
108 | if (res != -1) |
112 | if (res != -1) |
109 | { |
113 | { |
|
|
114 | *ttydev = strdup (ttyname (*fd_tty)); |
|
|
115 | return pfd; |
|
|
116 | } |
|
|
117 | |
|
|
118 | return -1; |
|
|
119 | } |
|
|
120 | |
|
|
121 | #elif defined(HAVE__GETPTY) |
|
|
122 | |
|
|
123 | static int |
|
|
124 | get_pty (int *fd_tty, char **ttydev) |
|
|
125 | { |
|
|
126 | int pfd; |
|
|
127 | char *slave; |
|
|
128 | |
|
|
129 | slave = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
|
|
130 | |
|
|
131 | if (slave != NULL) { |
110 | *ttydev = strdup (tty_name); |
132 | *ttydev = strdup (slave); |
111 | return pfd; |
133 | return pfd; |
112 | } |
134 | } |
113 | |
135 | |
114 | return -1; |
136 | return -1; |
115 | } |
137 | } |
116 | #elif defined(HAVE__GETPTY) |
|
|
117 | static int |
|
|
118 | get_pty (int *fd_tty, char **ttydev) |
|
|
119 | { |
|
|
120 | int pfd; |
|
|
121 | |
138 | |
122 | *ttydev = _getpty (&pfd, O_RDWR | O_NONBLOCK | O_NOCTTY, 0622, 0); |
|
|
123 | if (*ttydev != NULL) |
|
|
124 | return pfd; |
|
|
125 | |
|
|
126 | return -1; |
|
|
127 | } |
|
|
128 | #elif defined(HAVE_DEV_PTC) |
139 | #elif defined(HAVE_DEV_PTC) |
|
|
140 | |
129 | static int |
141 | static int |
130 | get_pty (int *fd_tty, char **ttydev) |
142 | get_pty (int *fd_tty, char **ttydev) |
131 | { |
143 | { |
132 | int pfd; |
144 | int pfd; |
133 | |
145 | |
134 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
146 | if ((pfd = open ("/dev/ptc", O_RDWR | O_NOCTTY, 0)) >= 0) |
135 | { |
147 | { |
136 | *ttydev = strdup (ttyname (pfd)); |
148 | *ttydev = strdup (ttyname (pfd)); |
137 | return pfd; |
149 | return pfd; |
138 | } |
150 | } |
139 | |
151 | |
140 | return -1; |
152 | return -1; |
141 | } |
153 | } |
|
|
154 | |
142 | #elif defined(HAVE_DEV_CLONE) |
155 | #elif defined(HAVE_DEV_CLONE) |
|
|
156 | |
143 | static int |
157 | static int |
144 | get_pty (int *fd_tty, char **ttydev) |
158 | get_pty (int *fd_tty, char **ttydev) |
145 | { |
159 | { |
146 | int pfd; |
160 | int pfd; |
147 | |
161 | |
148 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
162 | if ((pfd = open ("/dev/ptym/clone", O_RDWR | O_NOCTTY, 0)) >= 0) |
149 | { |
163 | { |
150 | *ttydev = strdup (ptsname (pfd)); |
164 | *ttydev = strdup (ptsname (pfd)); |
151 | return pfd; |
165 | return pfd; |
152 | } |
166 | } |
153 | |
167 | |
154 | return -1; |
168 | return -1; |
155 | } |
169 | } |
|
|
170 | |
156 | #else |
171 | #else |
|
|
172 | |
157 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
173 | /* Based on the code in openssh/openbsd-compat/bsd-openpty.c */ |
158 | static int |
174 | static int |
159 | get_pty (int *fd_tty, char **ttydev) |
175 | get_pty (int *fd_tty, char **ttydev) |
160 | { |
176 | { |
161 | int pfd; |
177 | int pfd; |
162 | int i; |
178 | int i; |
163 | char pty_name[32]; |
179 | char pty_name[32]; |
164 | char tty_name[32]; |
180 | char tty_name[32]; |
165 | const char *majors = "pqrstuvwxyzabcde"; |
181 | const char *majors = "pqrstuvwxyzabcde"; |
166 | const char *minors = "0123456789abcdef"; |
182 | const char *minors = "0123456789abcdef"; |
|
|
183 | |
167 | for (i = 0; i < 256; i++) |
184 | for (i = 0; i < 256; i++) |
168 | { |
185 | { |
169 | snprintf(pty_name, 32, "/dev/pty%c%c", majors[i / 16], minors[i % 16]); |
186 | 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]); |
187 | snprintf(tty_name, 32, "/dev/tty%c%c", majors[i / 16], minors[i % 16]); |
|
|
188 | |
171 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
189 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
172 | { |
190 | { |
173 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
191 | snprintf(pty_name, 32, "/dev/ptyp%d", i); |
174 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
192 | snprintf(tty_name, 32, "/dev/ttyp%d", i); |
175 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
193 | if ((pfd = open (pty_name, O_RDWR | O_NOCTTY, 0)) == -1) |
176 | continue; |
194 | continue; |
177 | } |
195 | } |
|
|
196 | |
178 | if (access (tty_name, R_OK | W_OK) == 0) |
197 | if (access (tty_name, R_OK | W_OK) == 0) |
179 | { |
198 | { |
180 | *ttydev = strdup (tty_name); |
199 | *ttydev = strdup (tty_name); |
181 | return pfd; |
200 | return pfd; |
182 | } |
201 | } |
183 | |
202 | |
184 | close (pfd); |
203 | close (pfd); |
185 | } |
204 | } |
186 | } |
205 | |
|
|
206 | return -1; |
|
|
207 | } |
|
|
208 | |
187 | #endif |
209 | #endif |
188 | |
210 | |
189 | /*----------------------------------------------------------------------*/ |
211 | /*----------------------------------------------------------------------*/ |
190 | /* |
212 | /* |
191 | * Returns tty file descriptor, or -1 on failure |
213 | * Returns tty file descriptor, or -1 on failure |
192 | */ |
214 | */ |
193 | static int |
215 | static int |
194 | get_tty (char *ttydev) |
216 | get_tty (char *ttydev) |
195 | { |
217 | { |
196 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
218 | return open (ttydev, O_RDWR | O_NOCTTY, 0); |
… | |
… | |
201 | * Make our tty a controlling tty so that /dev/tty points to us |
223 | * Make our tty a controlling tty so that /dev/tty points to us |
202 | */ |
224 | */ |
203 | static int |
225 | static int |
204 | control_tty (int fd_tty) |
226 | control_tty (int fd_tty) |
205 | { |
227 | { |
|
|
228 | int fd; |
|
|
229 | |
206 | setsid (); |
230 | setsid (); |
207 | |
231 | |
208 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
232 | #if defined(HAVE_DEV_PTMX) && defined(I_PUSH) |
209 | /* |
233 | /* |
210 | * Push STREAMS modules: |
234 | * Push STREAMS modules: |
… | |
… | |
231 | ioctl (fd_tty, I_PUSH, "ldterm"); |
255 | ioctl (fd_tty, I_PUSH, "ldterm"); |
232 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
256 | ioctl (fd_tty, I_PUSH, "ttcompat"); |
233 | } |
257 | } |
234 | #endif |
258 | #endif |
235 | |
259 | |
|
|
260 | #ifdef TIOCSCTTY |
236 | ioctl (fd_tty, TIOCSCTTY, NULL); |
261 | ioctl (fd_tty, TIOCSCTTY, NULL); |
|
|
262 | #else |
|
|
263 | fd = open (ttyname (fd_tty), O_RDWR); |
|
|
264 | if (fd >= 0) |
|
|
265 | close (fd); |
|
|
266 | #endif |
237 | |
267 | |
238 | int fd = open ("/dev/tty", O_WRONLY); |
268 | fd = open ("/dev/tty", O_WRONLY); |
239 | if (fd < 0) |
269 | if (fd < 0) |
240 | return -1; /* fatal */ |
270 | return -1; /* fatal */ |
241 | |
271 | |
242 | close (fd); |
272 | close (fd); |
243 | |
273 | |
… | |
… | |
327 | } |
357 | } |
328 | |
358 | |
329 | void |
359 | void |
330 | ptytty_unix::put () |
360 | ptytty_unix::put () |
331 | { |
361 | { |
|
|
362 | if (name) |
|
|
363 | { |
332 | chmod (name, RESTORE_TTY_MODE); |
364 | chmod (name, RESTORE_TTY_MODE); |
333 | chown (name, 0, ttyconf.gid); |
365 | chown (name, 0, ttyconf.gid); |
|
|
366 | } |
334 | |
367 | |
335 | close_tty (); |
368 | close_tty (); |
336 | |
369 | |
337 | if (pty >= 0) |
370 | if (pty >= 0) |
338 | close (pty); |
371 | close (pty); |
… | |
… | |
371 | } |
404 | } |
372 | |
405 | |
373 | return true; |
406 | return true; |
374 | } |
407 | } |
375 | |
408 | |
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 | |
|
|
429 | void |
|
|
430 | ptytty_proxy::login (int cmd_pid, bool login_shell, const char *hostname) |
|
|
431 | { |
|
|
432 | command cmd; |
|
|
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) |
|
|
519 | return; |
|
|
520 | |
|
|
521 | owner_pid = pid; |
|
|
522 | |
|
|
523 | int sv[2]; |
|
|
524 | |
|
|
525 | if (socketpair (AF_UNIX, SOCK_STREAM, 0, sv)) |
|
|
526 | ptytty_fatal ("could not create socket to communicate with pty/sessiondb helper, aborting.\n"); |
|
|
527 | |
|
|
528 | helper_pid = fork (); |
|
|
529 | |
|
|
530 | if (helper_pid < 0) |
|
|
531 | ptytty_fatal ("could not create pty/sessiondb helper process, aborting.\n"); |
|
|
532 | |
|
|
533 | if (helper_pid) |
|
|
534 | { |
|
|
535 | // client, process |
|
|
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 |
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543 | sock_fd = sv[1]; |
|
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544 | |
|
|
545 | chdir ("/"); |
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|
546 | |
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547 | for (int fd = 0; fd < 1023; fd++) |
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548 | if (fd != sock_fd) |
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549 | close (fd); |
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|
550 | |
|
|
551 | serve (); |
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|
552 | _exit (EXIT_SUCCESS); |
|
|
553 | } |
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554 | } |
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555 | |
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556 | #endif |
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|
557 | |
|
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558 | ptytty * |
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559 | ptytty::create () |
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560 | { |
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|
561 | #if PTYTTY_HELPER |
|
|
562 | if (helper_pid && getpid () == owner_pid) |
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|
563 | // use helper process |
|
|
564 | return new ptytty_proxy; |
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|
565 | else |
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|
566 | #endif |
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567 | return new ptytty_unix; |
|
|
568 | } |
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|
569 | |
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|
570 | void |
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571 | ptytty::init () |
|
|
572 | { |
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|
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 |
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|
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 | |
|
|