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7368a6c8 | 1 | /* |
2 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
3 | * All rights reserved | |
bcbf86ec | 4 | * |
5 | * As far as I am concerned, the code I have written for this software | |
6 | * can be used freely for any purpose. Any derived versions of this | |
7 | * software must be clearly marked as such, and if the derived work is | |
8 | * incompatible with the protocol description in the RFC file, it must be | |
9 | * called by a name other than "ssh" or "Secure Shell". | |
10 | * | |
e78a59f5 | 11 | * SSH2 support by Markus Friedl. |
a96070d4 | 12 | * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. |
bcbf86ec | 13 | * |
14 | * Redistribution and use in source and binary forms, with or without | |
15 | * modification, are permitted provided that the following conditions | |
16 | * are met: | |
17 | * 1. Redistributions of source code must retain the above copyright | |
18 | * notice, this list of conditions and the following disclaimer. | |
19 | * 2. Redistributions in binary form must reproduce the above copyright | |
20 | * notice, this list of conditions and the following disclaimer in the | |
21 | * documentation and/or other materials provided with the distribution. | |
22 | * | |
23 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
24 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
25 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
26 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
27 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
28 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
29 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
30 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
31 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
32 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
e78a59f5 | 33 | */ |
7368a6c8 | 34 | |
35 | #include "includes.h" | |
32214c88 | 36 | RCSID("$OpenBSD: session.c,v 1.152 2002/12/10 08:56:00 markus Exp $"); |
7368a6c8 | 37 | |
7368a6c8 | 38 | #include "ssh.h" |
42f11eb2 | 39 | #include "ssh1.h" |
40 | #include "ssh2.h" | |
41 | #include "xmalloc.h" | |
1729c161 | 42 | #include "sshpty.h" |
7368a6c8 | 43 | #include "packet.h" |
44 | #include "buffer.h" | |
7368a6c8 | 45 | #include "mpaux.h" |
7368a6c8 | 46 | #include "uidswap.h" |
47 | #include "compat.h" | |
a5efa1bb | 48 | #include "channels.h" |
e78a59f5 | 49 | #include "bufaux.h" |
e78a59f5 | 50 | #include "auth.h" |
38c295d6 | 51 | #include "auth-options.h" |
42f11eb2 | 52 | #include "pathnames.h" |
53 | #include "log.h" | |
54 | #include "servconf.h" | |
1729c161 | 55 | #include "sshlogin.h" |
42f11eb2 | 56 | #include "serverloop.h" |
57 | #include "canohost.h" | |
5ca51e19 | 58 | #include "session.h" |
1853d1ef | 59 | #include "monitor_wrap.h" |
e78a59f5 | 60 | |
3c62e7eb | 61 | #ifdef HAVE_CYGWIN |
62 | #include <windows.h> | |
63 | #include <sys/cygwin.h> | |
64 | #define is_winnt (GetVersion() < 0x80000000) | |
65 | #endif | |
66 | ||
7368a6c8 | 67 | /* func */ |
68 | ||
69 | Session *session_new(void); | |
9c328529 | 70 | void session_set_fds(Session *, int, int, int); |
1853d1ef | 71 | void session_pty_cleanup(void *); |
9c328529 | 72 | void session_proctitle(Session *); |
73 | int session_setup_x11fwd(Session *); | |
74 | void do_exec_pty(Session *, const char *); | |
75 | void do_exec_no_pty(Session *, const char *); | |
76 | void do_exec(Session *, const char *); | |
77 | void do_login(Session *, const char *); | |
8a9ac95d | 78 | #ifdef LOGIN_NEEDS_UTMPX |
79 | static void do_pre_login(Session *s); | |
80 | #endif | |
9c328529 | 81 | void do_child(Session *, const char *); |
f2c2fd71 | 82 | void do_motd(void); |
9c328529 | 83 | int check_quietlogin(Session *, const char *); |
7368a6c8 | 84 | |
396c147e | 85 | static void do_authenticated1(Authctxt *); |
86 | static void do_authenticated2(Authctxt *); | |
9c328529 | 87 | |
396c147e | 88 | static int session_pty_req(Session *); |
bb5639fe | 89 | |
7368a6c8 | 90 | /* import */ |
91 | extern ServerOptions options; | |
92 | extern char *__progname; | |
93 | extern int log_stderr; | |
94 | extern int debug_flag; | |
1e3b8b07 | 95 | extern u_int utmp_len; |
089fbbd2 | 96 | extern int startup_pipe; |
e78e738a | 97 | extern void destroy_sensitive_data(void); |
089fbbd2 | 98 | |
b5e300c2 | 99 | /* original command from peer. */ |
c95add71 | 100 | const char *original_command = NULL; |
b5e300c2 | 101 | |
7368a6c8 | 102 | /* data */ |
103 | #define MAX_SESSIONS 10 | |
104 | Session sessions[MAX_SESSIONS]; | |
c5d85828 | 105 | |
c1ef8333 | 106 | #ifdef WITH_AIXAUTHENTICATE |
c1ef8333 | 107 | char *aixloginmsg; |
108 | #endif /* WITH_AIXAUTHENTICATE */ | |
7368a6c8 | 109 | |
2e73a022 | 110 | #ifdef HAVE_LOGIN_CAP |
1836f69f | 111 | login_cap_t *lc; |
2e73a022 | 112 | #endif |
113 | ||
149cdb60 | 114 | /* Name and directory of socket for authentication agent forwarding. */ |
115 | static char *auth_sock_name = NULL; | |
116 | static char *auth_sock_dir = NULL; | |
117 | ||
118 | /* removes the agent forwarding socket */ | |
119 | ||
120 | static void | |
121 | auth_sock_cleanup_proc(void *_pw) | |
122 | { | |
123 | struct passwd *pw = _pw; | |
124 | ||
125 | if (auth_sock_name != NULL) { | |
126 | temporarily_use_uid(pw); | |
127 | unlink(auth_sock_name); | |
128 | rmdir(auth_sock_dir); | |
129 | auth_sock_name = NULL; | |
130 | restore_uid(); | |
131 | } | |
132 | } | |
133 | ||
134 | static int | |
135 | auth_input_request_forwarding(struct passwd * pw) | |
136 | { | |
137 | Channel *nc; | |
138 | int sock; | |
139 | struct sockaddr_un sunaddr; | |
140 | ||
141 | if (auth_sock_name != NULL) { | |
142 | error("authentication forwarding requested twice."); | |
143 | return 0; | |
144 | } | |
145 | ||
146 | /* Temporarily drop privileged uid for mkdir/bind. */ | |
147 | temporarily_use_uid(pw); | |
148 | ||
149 | /* Allocate a buffer for the socket name, and format the name. */ | |
150 | auth_sock_name = xmalloc(MAXPATHLEN); | |
151 | auth_sock_dir = xmalloc(MAXPATHLEN); | |
152 | strlcpy(auth_sock_dir, "/tmp/ssh-XXXXXXXX", MAXPATHLEN); | |
153 | ||
154 | /* Create private directory for socket */ | |
155 | if (mkdtemp(auth_sock_dir) == NULL) { | |
156 | packet_send_debug("Agent forwarding disabled: " | |
157 | "mkdtemp() failed: %.100s", strerror(errno)); | |
158 | restore_uid(); | |
159 | xfree(auth_sock_name); | |
160 | xfree(auth_sock_dir); | |
161 | auth_sock_name = NULL; | |
162 | auth_sock_dir = NULL; | |
163 | return 0; | |
164 | } | |
c457707e | 165 | snprintf(auth_sock_name, MAXPATHLEN, "%s/agent.%ld", |
166 | auth_sock_dir, (long) getpid()); | |
149cdb60 | 167 | |
168 | /* delete agent socket on fatal() */ | |
169 | fatal_add_cleanup(auth_sock_cleanup_proc, pw); | |
170 | ||
171 | /* Create the socket. */ | |
172 | sock = socket(AF_UNIX, SOCK_STREAM, 0); | |
173 | if (sock < 0) | |
174 | packet_disconnect("socket: %.100s", strerror(errno)); | |
175 | ||
176 | /* Bind it to the name. */ | |
177 | memset(&sunaddr, 0, sizeof(sunaddr)); | |
178 | sunaddr.sun_family = AF_UNIX; | |
179 | strlcpy(sunaddr.sun_path, auth_sock_name, sizeof(sunaddr.sun_path)); | |
180 | ||
181 | if (bind(sock, (struct sockaddr *) & sunaddr, sizeof(sunaddr)) < 0) | |
182 | packet_disconnect("bind: %.100s", strerror(errno)); | |
183 | ||
184 | /* Restore the privileged uid. */ | |
185 | restore_uid(); | |
186 | ||
187 | /* Start listening on the socket. */ | |
188 | if (listen(sock, 5) < 0) | |
189 | packet_disconnect("listen: %.100s", strerror(errno)); | |
190 | ||
191 | /* Allocate a channel for the authentication agent socket. */ | |
192 | nc = channel_new("auth socket", | |
193 | SSH_CHANNEL_AUTH_SOCKET, sock, sock, -1, | |
194 | CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT, | |
195 | 0, xstrdup("auth socket"), 1); | |
196 | strlcpy(nc->path, auth_sock_name, sizeof(nc->path)); | |
197 | return 1; | |
198 | } | |
199 | ||
200 | ||
bb5639fe | 201 | void |
202 | do_authenticated(Authctxt *authctxt) | |
203 | { | |
204 | /* | |
205 | * Cancel the alarm we set to limit the time taken for | |
206 | * authentication. | |
207 | */ | |
208 | alarm(0); | |
209 | if (startup_pipe != -1) { | |
210 | close(startup_pipe); | |
211 | startup_pipe = -1; | |
212 | } | |
19e810f6 | 213 | |
bb5639fe | 214 | /* setup the channel layer */ |
215 | if (!no_port_forwarding_flag && options.allow_tcp_forwarding) | |
216 | channel_permit_all_opens(); | |
217 | ||
218 | if (compat20) | |
219 | do_authenticated2(authctxt); | |
220 | else | |
221 | do_authenticated1(authctxt); | |
e4f7282d | 222 | |
b44de2b1 | 223 | /* remove agent socket */ |
149cdb60 | 224 | if (auth_sock_name != NULL) |
f0f32b8e | 225 | auth_sock_cleanup_proc(authctxt->pw); |
ced49be2 | 226 | #ifdef KRB4 |
227 | if (options.kerberos_ticket_cleanup) | |
228 | krb4_cleanup_proc(authctxt); | |
229 | #endif | |
230 | #ifdef KRB5 | |
231 | if (options.kerberos_ticket_cleanup) | |
232 | krb5_cleanup_proc(authctxt); | |
233 | #endif | |
bb5639fe | 234 | } |
235 | ||
7368a6c8 | 236 | /* |
237 | * Prepares for an interactive session. This is called after the user has | |
238 | * been successfully authenticated. During this message exchange, pseudo | |
239 | * terminals are allocated, X11, TCP/IP, and authentication agent forwardings | |
240 | * are requested, etc. | |
241 | */ | |
396c147e | 242 | static void |
bb5639fe | 243 | do_authenticated1(Authctxt *authctxt) |
7368a6c8 | 244 | { |
245 | Session *s; | |
7368a6c8 | 246 | char *command; |
54a5250f | 247 | int success, type, screen_flag; |
7138ebd9 | 248 | int enable_compression_after_reply = 0; |
249 | u_int proto_len, data_len, dlen, compression_level = 0; | |
7368a6c8 | 250 | |
251 | s = session_new(); | |
ced49be2 | 252 | s->authctxt = authctxt; |
bb5639fe | 253 | s->pw = authctxt->pw; |
2e73a022 | 254 | |
7368a6c8 | 255 | /* |
256 | * We stay in this loop until the client requests to execute a shell | |
257 | * or a command. | |
258 | */ | |
259 | for (;;) { | |
bb5639fe | 260 | success = 0; |
7368a6c8 | 261 | |
262 | /* Get a packet from the client. */ | |
54a5250f | 263 | type = packet_read(); |
7368a6c8 | 264 | |
265 | /* Process the packet. */ | |
266 | switch (type) { | |
267 | case SSH_CMSG_REQUEST_COMPRESSION: | |
7368a6c8 | 268 | compression_level = packet_get_int(); |
95500969 | 269 | packet_check_eom(); |
7368a6c8 | 270 | if (compression_level < 1 || compression_level > 9) { |
271 | packet_send_debug("Received illegal compression level %d.", | |
184eed6a | 272 | compression_level); |
7368a6c8 | 273 | break; |
274 | } | |
636f76ca | 275 | if (!options.compression) { |
276 | debug2("compression disabled"); | |
277 | break; | |
278 | } | |
7368a6c8 | 279 | /* Enable compression after we have responded with SUCCESS. */ |
280 | enable_compression_after_reply = 1; | |
281 | success = 1; | |
282 | break; | |
283 | ||
284 | case SSH_CMSG_REQUEST_PTY: | |
653d5f86 | 285 | success = session_pty_req(s); |
7368a6c8 | 286 | break; |
287 | ||
288 | case SSH_CMSG_X11_REQUEST_FORWARDING: | |
7368a6c8 | 289 | s->auth_proto = packet_get_string(&proto_len); |
290 | s->auth_data = packet_get_string(&data_len); | |
7368a6c8 | 291 | |
2af09193 | 292 | screen_flag = packet_get_protocol_flags() & |
293 | SSH_PROTOFLAG_SCREEN_NUMBER; | |
294 | debug2("SSH_PROTOFLAG_SCREEN_NUMBER: %d", screen_flag); | |
295 | ||
296 | if (packet_remaining() == 4) { | |
297 | if (!screen_flag) | |
298 | debug2("Buggy client: " | |
299 | "X11 screen flag missing"); | |
7368a6c8 | 300 | s->screen = packet_get_int(); |
c8b058b4 | 301 | } else { |
7368a6c8 | 302 | s->screen = 0; |
c8b058b4 | 303 | } |
95500969 | 304 | packet_check_eom(); |
8dcd9d5c | 305 | success = session_setup_x11fwd(s); |
306 | if (!success) { | |
307 | xfree(s->auth_proto); | |
308 | xfree(s->auth_data); | |
1500bcdd | 309 | s->auth_proto = NULL; |
310 | s->auth_data = NULL; | |
7368a6c8 | 311 | } |
7368a6c8 | 312 | break; |
7368a6c8 | 313 | |
314 | case SSH_CMSG_AGENT_REQUEST_FORWARDING: | |
315 | if (no_agent_forwarding_flag || compat13) { | |
316 | debug("Authentication agent forwarding not permitted for this authentication."); | |
317 | break; | |
318 | } | |
319 | debug("Received authentication agent forwarding request."); | |
bb5639fe | 320 | success = auth_input_request_forwarding(s->pw); |
7368a6c8 | 321 | break; |
322 | ||
323 | case SSH_CMSG_PORT_FORWARD_REQUEST: | |
324 | if (no_port_forwarding_flag) { | |
325 | debug("Port forwarding not permitted for this authentication."); | |
326 | break; | |
327 | } | |
33de75a3 | 328 | if (!options.allow_tcp_forwarding) { |
329 | debug("Port forwarding not permitted."); | |
330 | break; | |
331 | } | |
7368a6c8 | 332 | debug("Received TCP/IP port forwarding request."); |
bb5639fe | 333 | channel_input_port_forward_request(s->pw->pw_uid == 0, options.gateway_ports); |
7368a6c8 | 334 | success = 1; |
335 | break; | |
336 | ||
337 | case SSH_CMSG_MAX_PACKET_SIZE: | |
338 | if (packet_set_maxsize(packet_get_int()) > 0) | |
339 | success = 1; | |
340 | break; | |
184eed6a | 341 | |
ced49be2 | 342 | #if defined(AFS) || defined(KRB5) |
343 | case SSH_CMSG_HAVE_KERBEROS_TGT: | |
344 | if (!options.kerberos_tgt_passing) { | |
345 | verbose("Kerberos TGT passing disabled."); | |
346 | } else { | |
347 | char *kdata = packet_get_string(&dlen); | |
95500969 | 348 | packet_check_eom(); |
184eed6a | 349 | |
ced49be2 | 350 | /* XXX - 0x41, see creds_to_radix version */ |
351 | if (kdata[0] != 0x41) { | |
352 | #ifdef KRB5 | |
353 | krb5_data tgt; | |
354 | tgt.data = kdata; | |
355 | tgt.length = dlen; | |
184eed6a | 356 | |
ced49be2 | 357 | if (auth_krb5_tgt(s->authctxt, &tgt)) |
358 | success = 1; | |
359 | else | |
360 | verbose("Kerberos v5 TGT refused for %.100s", s->authctxt->user); | |
361 | #endif /* KRB5 */ | |
362 | } else { | |
363 | #ifdef AFS | |
364 | if (auth_krb4_tgt(s->authctxt, kdata)) | |
365 | success = 1; | |
366 | else | |
367 | verbose("Kerberos v4 TGT refused for %.100s", s->authctxt->user); | |
368 | #endif /* AFS */ | |
369 | } | |
370 | xfree(kdata); | |
371 | } | |
372 | break; | |
373 | #endif /* AFS || KRB5 */ | |
184eed6a | 374 | |
ced49be2 | 375 | #ifdef AFS |
376 | case SSH_CMSG_HAVE_AFS_TOKEN: | |
377 | if (!options.afs_token_passing || !k_hasafs()) { | |
378 | verbose("AFS token passing disabled."); | |
379 | } else { | |
380 | /* Accept AFS token. */ | |
381 | char *token = packet_get_string(&dlen); | |
95500969 | 382 | packet_check_eom(); |
184eed6a | 383 | |
ced49be2 | 384 | if (auth_afs_token(s->authctxt, token)) |
385 | success = 1; | |
386 | else | |
387 | verbose("AFS token refused for %.100s", | |
388 | s->authctxt->user); | |
389 | xfree(token); | |
390 | } | |
391 | break; | |
392 | #endif /* AFS */ | |
7368a6c8 | 393 | |
394 | case SSH_CMSG_EXEC_SHELL: | |
395 | case SSH_CMSG_EXEC_CMD: | |
7368a6c8 | 396 | if (type == SSH_CMSG_EXEC_CMD) { |
397 | command = packet_get_string(&dlen); | |
398 | debug("Exec command '%.500s'", command); | |
c95add71 | 399 | do_exec(s, command); |
400 | xfree(command); | |
7368a6c8 | 401 | } else { |
c95add71 | 402 | do_exec(s, NULL); |
7368a6c8 | 403 | } |
95500969 | 404 | packet_check_eom(); |
fc2a1d28 | 405 | session_close(s); |
7368a6c8 | 406 | return; |
407 | ||
408 | default: | |
409 | /* | |
410 | * Any unknown messages in this phase are ignored, | |
411 | * and a failure message is returned. | |
412 | */ | |
413 | log("Unknown packet type received after authentication: %d", type); | |
414 | } | |
415 | packet_start(success ? SSH_SMSG_SUCCESS : SSH_SMSG_FAILURE); | |
416 | packet_send(); | |
417 | packet_write_wait(); | |
418 | ||
419 | /* Enable compression now that we have replied if appropriate. */ | |
420 | if (enable_compression_after_reply) { | |
421 | enable_compression_after_reply = 0; | |
422 | packet_start_compression(compression_level); | |
423 | } | |
424 | } | |
425 | } | |
426 | ||
427 | /* | |
428 | * This is called to fork and execute a command when we have no tty. This | |
429 | * will call do_child from the child, and server_loop from the parent after | |
430 | * setting up file descriptors and such. | |
431 | */ | |
6ae2364d | 432 | void |
65068d16 | 433 | do_exec_no_pty(Session *s, const char *command) |
7368a6c8 | 434 | { |
c457707e | 435 | pid_t pid; |
7368a6c8 | 436 | |
437 | #ifdef USE_PIPES | |
438 | int pin[2], pout[2], perr[2]; | |
439 | /* Allocate pipes for communicating with the program. */ | |
440 | if (pipe(pin) < 0 || pipe(pout) < 0 || pipe(perr) < 0) | |
441 | packet_disconnect("Could not create pipes: %.100s", | |
442 | strerror(errno)); | |
443 | #else /* USE_PIPES */ | |
444 | int inout[2], err[2]; | |
445 | /* Uses socket pairs to communicate with the program. */ | |
446 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) < 0 || | |
447 | socketpair(AF_UNIX, SOCK_STREAM, 0, err) < 0) | |
448 | packet_disconnect("Could not create socket pairs: %.100s", | |
449 | strerror(errno)); | |
450 | #endif /* USE_PIPES */ | |
451 | if (s == NULL) | |
452 | fatal("do_exec_no_pty: no session"); | |
453 | ||
1d1ffb87 | 454 | session_proctitle(s); |
7368a6c8 | 455 | |
b19d61d7 | 456 | #if defined(USE_PAM) |
78220944 | 457 | do_pam_session(s->pw->pw_name, NULL); |
9afbfcfa | 458 | do_pam_setcred(1); |
7eb73cc1 | 459 | if (is_pam_password_change_required()) |
460 | packet_disconnect("Password change required but no " | |
461 | "TTY available"); | |
266140a8 | 462 | #endif /* USE_PAM */ |
463 | ||
7368a6c8 | 464 | /* Fork the child. */ |
465 | if ((pid = fork()) == 0) { | |
516f0d7d | 466 | fatal_remove_all_cleanups(); |
467 | ||
7368a6c8 | 468 | /* Child. Reinitialize the log since the pid has changed. */ |
469 | log_init(__progname, options.log_level, options.log_facility, log_stderr); | |
470 | ||
471 | /* | |
472 | * Create a new session and process group since the 4.4BSD | |
473 | * setlogin() affects the entire process group. | |
474 | */ | |
475 | if (setsid() < 0) | |
476 | error("setsid failed: %.100s", strerror(errno)); | |
477 | ||
478 | #ifdef USE_PIPES | |
479 | /* | |
480 | * Redirect stdin. We close the parent side of the socket | |
481 | * pair, and make the child side the standard input. | |
482 | */ | |
483 | close(pin[1]); | |
484 | if (dup2(pin[0], 0) < 0) | |
485 | perror("dup2 stdin"); | |
486 | close(pin[0]); | |
487 | ||
488 | /* Redirect stdout. */ | |
489 | close(pout[0]); | |
490 | if (dup2(pout[1], 1) < 0) | |
491 | perror("dup2 stdout"); | |
492 | close(pout[1]); | |
493 | ||
494 | /* Redirect stderr. */ | |
495 | close(perr[0]); | |
496 | if (dup2(perr[1], 2) < 0) | |
497 | perror("dup2 stderr"); | |
498 | close(perr[1]); | |
499 | #else /* USE_PIPES */ | |
500 | /* | |
501 | * Redirect stdin, stdout, and stderr. Stdin and stdout will | |
502 | * use the same socket, as some programs (particularly rdist) | |
503 | * seem to depend on it. | |
504 | */ | |
505 | close(inout[1]); | |
506 | close(err[1]); | |
507 | if (dup2(inout[0], 0) < 0) /* stdin */ | |
508 | perror("dup2 stdin"); | |
509 | if (dup2(inout[0], 1) < 0) /* stdout. Note: same socket as stdin. */ | |
510 | perror("dup2 stdout"); | |
511 | if (dup2(err[0], 2) < 0) /* stderr */ | |
512 | perror("dup2 stderr"); | |
513 | #endif /* USE_PIPES */ | |
514 | ||
ef51930f | 515 | #ifdef _UNICOS |
516 | cray_init_job(s->pw); /* set up cray jid and tmpdir */ | |
517 | #endif | |
518 | ||
7368a6c8 | 519 | /* Do processing for the child (exec command etc). */ |
56b3e9ce | 520 | do_child(s, command); |
7368a6c8 | 521 | /* NOTREACHED */ |
522 | } | |
ef51930f | 523 | #ifdef _UNICOS |
524 | signal(WJSIGNAL, cray_job_termination_handler); | |
525 | #endif /* _UNICOS */ | |
3c62e7eb | 526 | #ifdef HAVE_CYGWIN |
527 | if (is_winnt) | |
528 | cygwin_set_impersonation_token(INVALID_HANDLE_VALUE); | |
529 | #endif | |
7368a6c8 | 530 | if (pid < 0) |
531 | packet_disconnect("fork failed: %.100s", strerror(errno)); | |
532 | s->pid = pid; | |
b5c334cc | 533 | /* Set interactive/non-interactive mode. */ |
534 | packet_set_interactive(s->display != NULL); | |
7368a6c8 | 535 | #ifdef USE_PIPES |
536 | /* We are the parent. Close the child sides of the pipes. */ | |
537 | close(pin[0]); | |
538 | close(pout[1]); | |
539 | close(perr[1]); | |
540 | ||
e78a59f5 | 541 | if (compat20) { |
e5d7a405 | 542 | session_set_fds(s, pin[1], pout[0], s->is_subsystem ? -1 : perr[0]); |
e78a59f5 | 543 | } else { |
544 | /* Enter the interactive session. */ | |
545 | server_loop(pid, pin[1], pout[0], perr[0]); | |
e5d7a405 | 546 | /* server_loop has closed pin[1], pout[0], and perr[0]. */ |
e78a59f5 | 547 | } |
7368a6c8 | 548 | #else /* USE_PIPES */ |
549 | /* We are the parent. Close the child sides of the socket pairs. */ | |
550 | close(inout[0]); | |
551 | close(err[0]); | |
552 | ||
553 | /* | |
554 | * Enter the interactive session. Note: server_loop must be able to | |
555 | * handle the case that fdin and fdout are the same. | |
556 | */ | |
e78a59f5 | 557 | if (compat20) { |
e5d7a405 | 558 | session_set_fds(s, inout[1], inout[1], s->is_subsystem ? -1 : err[1]); |
e78a59f5 | 559 | } else { |
560 | server_loop(pid, inout[1], inout[1], err[1]); | |
561 | /* server_loop has closed inout[1] and err[1]. */ | |
562 | } | |
7368a6c8 | 563 | #endif /* USE_PIPES */ |
564 | } | |
565 | ||
566 | /* | |
567 | * This is called to fork and execute a command when we have a tty. This | |
568 | * will call do_child from the child, and server_loop from the parent after | |
569 | * setting up file descriptors, controlling tty, updating wtmp, utmp, | |
570 | * lastlog, and other such operations. | |
571 | */ | |
6ae2364d | 572 | void |
65068d16 | 573 | do_exec_pty(Session *s, const char *command) |
7368a6c8 | 574 | { |
7368a6c8 | 575 | int fdout, ptyfd, ttyfd, ptymaster; |
7368a6c8 | 576 | pid_t pid; |
7368a6c8 | 577 | |
578 | if (s == NULL) | |
579 | fatal("do_exec_pty: no session"); | |
580 | ptyfd = s->ptyfd; | |
581 | ttyfd = s->ttyfd; | |
582 | ||
b19d61d7 | 583 | #if defined(USE_PAM) |
bb5639fe | 584 | do_pam_session(s->pw->pw_name, s->tty); |
9afbfcfa | 585 | do_pam_setcred(1); |
27cf96de | 586 | #endif |
266140a8 | 587 | |
7368a6c8 | 588 | /* Fork the child. */ |
589 | if ((pid = fork()) == 0) { | |
516f0d7d | 590 | fatal_remove_all_cleanups(); |
57156994 | 591 | |
c345cf9d | 592 | /* Child. Reinitialize the log because the pid has changed. */ |
7368a6c8 | 593 | log_init(__progname, options.log_level, options.log_facility, log_stderr); |
7368a6c8 | 594 | /* Close the master side of the pseudo tty. */ |
595 | close(ptyfd); | |
596 | ||
597 | /* Make the pseudo tty our controlling tty. */ | |
598 | pty_make_controlling_tty(&ttyfd, s->tty); | |
599 | ||
05fd093c | 600 | /* Redirect stdin/stdout/stderr from the pseudo tty. */ |
601 | if (dup2(ttyfd, 0) < 0) | |
602 | error("dup2 stdin: %s", strerror(errno)); | |
603 | if (dup2(ttyfd, 1) < 0) | |
604 | error("dup2 stdout: %s", strerror(errno)); | |
605 | if (dup2(ttyfd, 2) < 0) | |
606 | error("dup2 stderr: %s", strerror(errno)); | |
7368a6c8 | 607 | |
608 | /* Close the extra descriptor for the pseudo tty. */ | |
609 | close(ttyfd); | |
610 | ||
c345cf9d | 611 | /* record login, etc. similar to login(1) */ |
c96a4aaf | 612 | #ifndef HAVE_OSF_SIA |
ef51930f | 613 | if (!(options.use_login && command == NULL)) { |
614 | #ifdef _UNICOS | |
615 | cray_init_job(s->pw); /* set up cray jid and tmpdir */ | |
616 | #endif /* _UNICOS */ | |
a22aff1f | 617 | do_login(s, command); |
ef51930f | 618 | } |
7e2d5fa4 | 619 | # ifdef LOGIN_NEEDS_UTMPX |
620 | else | |
621 | do_pre_login(s); | |
622 | # endif | |
c96a4aaf | 623 | #endif |
7368a6c8 | 624 | |
7368a6c8 | 625 | /* Do common processing for the child, such as execing the command. */ |
56b3e9ce | 626 | do_child(s, command); |
7368a6c8 | 627 | /* NOTREACHED */ |
628 | } | |
ef51930f | 629 | #ifdef _UNICOS |
630 | signal(WJSIGNAL, cray_job_termination_handler); | |
631 | #endif /* _UNICOS */ | |
3c62e7eb | 632 | #ifdef HAVE_CYGWIN |
633 | if (is_winnt) | |
634 | cygwin_set_impersonation_token(INVALID_HANDLE_VALUE); | |
635 | #endif | |
7368a6c8 | 636 | if (pid < 0) |
637 | packet_disconnect("fork failed: %.100s", strerror(errno)); | |
638 | s->pid = pid; | |
639 | ||
640 | /* Parent. Close the slave side of the pseudo tty. */ | |
641 | close(ttyfd); | |
642 | ||
643 | /* | |
644 | * Create another descriptor of the pty master side for use as the | |
645 | * standard input. We could use the original descriptor, but this | |
646 | * simplifies code in server_loop. The descriptor is bidirectional. | |
647 | */ | |
648 | fdout = dup(ptyfd); | |
649 | if (fdout < 0) | |
650 | packet_disconnect("dup #1 failed: %.100s", strerror(errno)); | |
651 | ||
652 | /* we keep a reference to the pty master */ | |
653 | ptymaster = dup(ptyfd); | |
654 | if (ptymaster < 0) | |
655 | packet_disconnect("dup #2 failed: %.100s", strerror(errno)); | |
656 | s->ptymaster = ptymaster; | |
657 | ||
658 | /* Enter interactive session. */ | |
b5c334cc | 659 | packet_set_interactive(1); |
e78a59f5 | 660 | if (compat20) { |
661 | session_set_fds(s, ptyfd, fdout, -1); | |
662 | } else { | |
663 | server_loop(pid, ptyfd, fdout, -1); | |
664 | /* server_loop _has_ closed ptyfd and fdout. */ | |
e78a59f5 | 665 | } |
7368a6c8 | 666 | } |
667 | ||
7e2d5fa4 | 668 | #ifdef LOGIN_NEEDS_UTMPX |
0e0144b7 | 669 | static void |
7e2d5fa4 | 670 | do_pre_login(Session *s) |
671 | { | |
672 | socklen_t fromlen; | |
673 | struct sockaddr_storage from; | |
674 | pid_t pid = getpid(); | |
675 | ||
676 | /* | |
677 | * Get IP address of client. If the connection is not a socket, let | |
678 | * the address be 0.0.0.0. | |
679 | */ | |
680 | memset(&from, 0, sizeof(from)); | |
ba1566dd | 681 | fromlen = sizeof(from); |
7e2d5fa4 | 682 | if (packet_connection_is_on_socket()) { |
7e2d5fa4 | 683 | if (getpeername(packet_get_connection_in(), |
184eed6a | 684 | (struct sockaddr *) & from, &fromlen) < 0) { |
7e2d5fa4 | 685 | debug("getpeername: %.100s", strerror(errno)); |
686 | fatal_cleanup(); | |
687 | } | |
688 | } | |
689 | ||
690 | record_utmp_only(pid, s->tty, s->pw->pw_name, | |
983784a1 | 691 | get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping), |
d4ac26ed | 692 | (struct sockaddr *)&from, fromlen); |
7e2d5fa4 | 693 | } |
694 | #endif | |
695 | ||
dac6753b | 696 | /* |
697 | * This is called to fork and execute a command. If another command is | |
698 | * to be forced, execute that instead. | |
699 | */ | |
700 | void | |
701 | do_exec(Session *s, const char *command) | |
702 | { | |
703 | if (forced_command) { | |
704 | original_command = command; | |
705 | command = forced_command; | |
dac6753b | 706 | debug("Forced command '%.900s'", command); |
707 | } | |
708 | ||
709 | if (s->ttyfd != -1) | |
710 | do_exec_pty(s, command); | |
711 | else | |
712 | do_exec_no_pty(s, command); | |
713 | ||
c95add71 | 714 | original_command = NULL; |
dac6753b | 715 | } |
716 | ||
f7342052 | 717 | |
c345cf9d | 718 | /* administrative, login(1)-like work */ |
719 | void | |
a22aff1f | 720 | do_login(Session *s, const char *command) |
c345cf9d | 721 | { |
c345cf9d | 722 | char *time_string; |
c345cf9d | 723 | socklen_t fromlen; |
724 | struct sockaddr_storage from; | |
c345cf9d | 725 | struct passwd * pw = s->pw; |
726 | pid_t pid = getpid(); | |
727 | ||
728 | /* | |
729 | * Get IP address of client. If the connection is not a socket, let | |
730 | * the address be 0.0.0.0. | |
731 | */ | |
732 | memset(&from, 0, sizeof(from)); | |
d4ac26ed | 733 | fromlen = sizeof(from); |
c345cf9d | 734 | if (packet_connection_is_on_socket()) { |
c345cf9d | 735 | if (getpeername(packet_get_connection_in(), |
f7342052 | 736 | (struct sockaddr *) & from, &fromlen) < 0) { |
c345cf9d | 737 | debug("getpeername: %.100s", strerror(errno)); |
738 | fatal_cleanup(); | |
739 | } | |
740 | } | |
741 | ||
742 | /* Record that there was a login on that tty from the remote host. */ | |
49a34e84 | 743 | if (!use_privsep) |
744 | record_login(pid, s->tty, pw->pw_name, pw->pw_uid, | |
745 | get_remote_name_or_ip(utmp_len, | |
746 | options.verify_reverse_mapping), | |
ba1566dd | 747 | (struct sockaddr *)&from, fromlen); |
c345cf9d | 748 | |
2919e060 | 749 | #ifdef USE_PAM |
750 | /* | |
751 | * If password change is needed, do it now. | |
752 | * This needs to occur before the ~/.hushlogin check. | |
753 | */ | |
e11aab29 | 754 | if (is_pam_password_change_required()) { |
2919e060 | 755 | print_pam_messages(); |
756 | do_pam_chauthtok(); | |
757 | } | |
758 | #endif | |
759 | ||
f2c2fd71 | 760 | if (check_quietlogin(s, command)) |
c345cf9d | 761 | return; |
762 | ||
763 | #ifdef USE_PAM | |
e11aab29 | 764 | if (!is_pam_password_change_required()) |
2919e060 | 765 | print_pam_messages(); |
c345cf9d | 766 | #endif /* USE_PAM */ |
767 | #ifdef WITH_AIXAUTHENTICATE | |
768 | if (aixloginmsg && *aixloginmsg) | |
769 | printf("%s\n", aixloginmsg); | |
770 | #endif /* WITH_AIXAUTHENTICATE */ | |
771 | ||
ef51930f | 772 | #ifndef NO_SSH_LASTLOG |
ffbf7323 | 773 | if (options.print_lastlog && s->last_login_time != 0) { |
774 | time_string = ctime(&s->last_login_time); | |
c345cf9d | 775 | if (strchr(time_string, '\n')) |
776 | *strchr(time_string, '\n') = 0; | |
ffbf7323 | 777 | if (strcmp(s->hostname, "") == 0) |
c345cf9d | 778 | printf("Last login: %s\r\n", time_string); |
779 | else | |
ffbf7323 | 780 | printf("Last login: %s from %s\r\n", time_string, |
781 | s->hostname); | |
c345cf9d | 782 | } |
ef51930f | 783 | #endif /* NO_SSH_LASTLOG */ |
f2c2fd71 | 784 | |
785 | do_motd(); | |
786 | } | |
787 | ||
788 | /* | |
789 | * Display the message of the day. | |
790 | */ | |
791 | void | |
792 | do_motd(void) | |
793 | { | |
794 | FILE *f; | |
795 | char buf[256]; | |
796 | ||
c345cf9d | 797 | if (options.print_motd) { |
2e73a022 | 798 | #ifdef HAVE_LOGIN_CAP |
799 | f = fopen(login_getcapstr(lc, "welcome", "/etc/motd", | |
800 | "/etc/motd"), "r"); | |
801 | #else | |
c345cf9d | 802 | f = fopen("/etc/motd", "r"); |
2e73a022 | 803 | #endif |
c345cf9d | 804 | if (f) { |
805 | while (fgets(buf, sizeof(buf), f)) | |
806 | fputs(buf, stdout); | |
807 | fclose(f); | |
808 | } | |
809 | } | |
810 | } | |
811 | ||
9c328529 | 812 | |
813 | /* | |
814 | * Check for quiet login, either .hushlogin or command given. | |
815 | */ | |
816 | int | |
817 | check_quietlogin(Session *s, const char *command) | |
818 | { | |
819 | char buf[256]; | |
820 | struct passwd *pw = s->pw; | |
821 | struct stat st; | |
822 | ||
823 | /* Return 1 if .hushlogin exists or a command given. */ | |
824 | if (command != NULL) | |
825 | return 1; | |
826 | snprintf(buf, sizeof(buf), "%.200s/.hushlogin", pw->pw_dir); | |
827 | #ifdef HAVE_LOGIN_CAP | |
828 | if (login_getcapbool(lc, "hushlogin", 0) || stat(buf, &st) >= 0) | |
829 | return 1; | |
830 | #else | |
831 | if (stat(buf, &st) >= 0) | |
832 | return 1; | |
833 | #endif | |
834 | return 0; | |
835 | } | |
836 | ||
7368a6c8 | 837 | /* |
838 | * Sets the value of the given variable in the environment. If the variable | |
839 | * already exists, its value is overriden. | |
840 | */ | |
396c147e | 841 | static void |
1e3b8b07 | 842 | child_set_env(char ***envp, u_int *envsizep, const char *name, |
184eed6a | 843 | const char *value) |
7368a6c8 | 844 | { |
1e3b8b07 | 845 | u_int i, namelen; |
7368a6c8 | 846 | char **env; |
847 | ||
848 | /* | |
849 | * Find the slot where the value should be stored. If the variable | |
850 | * already exists, we reuse the slot; otherwise we append a new slot | |
851 | * at the end of the array, expanding if necessary. | |
852 | */ | |
853 | env = *envp; | |
854 | namelen = strlen(name); | |
855 | for (i = 0; env[i]; i++) | |
856 | if (strncmp(env[i], name, namelen) == 0 && env[i][namelen] == '=') | |
857 | break; | |
858 | if (env[i]) { | |
859 | /* Reuse the slot. */ | |
860 | xfree(env[i]); | |
861 | } else { | |
862 | /* New variable. Expand if necessary. */ | |
863 | if (i >= (*envsizep) - 1) { | |
87f18810 | 864 | if (*envsizep >= 1000) |
865 | fatal("child_set_env: too many env vars," | |
866 | " skipping: %.100s", name); | |
7368a6c8 | 867 | (*envsizep) += 50; |
868 | env = (*envp) = xrealloc(env, (*envsizep) * sizeof(char *)); | |
869 | } | |
870 | /* Need to set the NULL pointer at end of array beyond the new slot. */ | |
871 | env[i + 1] = NULL; | |
872 | } | |
873 | ||
874 | /* Allocate space and format the variable in the appropriate slot. */ | |
875 | env[i] = xmalloc(strlen(name) + 1 + strlen(value) + 1); | |
876 | snprintf(env[i], strlen(name) + 1 + strlen(value) + 1, "%s=%s", name, value); | |
877 | } | |
878 | ||
879 | /* | |
880 | * Reads environment variables from the given file and adds/overrides them | |
881 | * into the environment. If the file does not exist, this does nothing. | |
882 | * Otherwise, it must consist of empty lines, comments (line starts with '#') | |
883 | * and assignments of the form name=value. No other forms are allowed. | |
884 | */ | |
396c147e | 885 | static void |
1e3b8b07 | 886 | read_environment_file(char ***env, u_int *envsize, |
184eed6a | 887 | const char *filename) |
7368a6c8 | 888 | { |
889 | FILE *f; | |
890 | char buf[4096]; | |
891 | char *cp, *value; | |
66087567 | 892 | u_int lineno = 0; |
7368a6c8 | 893 | |
894 | f = fopen(filename, "r"); | |
895 | if (!f) | |
896 | return; | |
897 | ||
898 | while (fgets(buf, sizeof(buf), f)) { | |
66087567 | 899 | if (++lineno > 1000) |
900 | fatal("Too many lines in environment file %s", filename); | |
7368a6c8 | 901 | for (cp = buf; *cp == ' ' || *cp == '\t'; cp++) |
902 | ; | |
903 | if (!*cp || *cp == '#' || *cp == '\n') | |
904 | continue; | |
905 | if (strchr(cp, '\n')) | |
906 | *strchr(cp, '\n') = '\0'; | |
907 | value = strchr(cp, '='); | |
908 | if (value == NULL) { | |
66087567 | 909 | fprintf(stderr, "Bad line %u in %.100s\n", lineno, |
910 | filename); | |
7368a6c8 | 911 | continue; |
912 | } | |
71276795 | 913 | /* |
914 | * Replace the equals sign by nul, and advance value to | |
915 | * the value string. | |
916 | */ | |
7368a6c8 | 917 | *value = '\0'; |
918 | value++; | |
919 | child_set_env(env, envsize, cp, value); | |
920 | } | |
921 | fclose(f); | |
922 | } | |
923 | ||
760b35a6 | 924 | void copy_environment(char **source, char ***env, u_int *envsize) |
7368a6c8 | 925 | { |
760b35a6 | 926 | char *var_name, *var_val; |
7368a6c8 | 927 | int i; |
928 | ||
760b35a6 | 929 | if (source == NULL) |
7368a6c8 | 930 | return; |
2b87da3b | 931 | |
760b35a6 | 932 | for(i = 0; source[i] != NULL; i++) { |
933 | var_name = xstrdup(source[i]); | |
934 | if ((var_val = strstr(var_name, "=")) == NULL) { | |
935 | xfree(var_name); | |
7368a6c8 | 936 | continue; |
7368a6c8 | 937 | } |
760b35a6 | 938 | *var_val++ = '\0'; |
7368a6c8 | 939 | |
760b35a6 | 940 | debug3("Copy environment: %s=%s", var_name, var_val); |
941 | child_set_env(env, envsize, var_name, var_val); | |
942 | ||
943 | xfree(var_name); | |
22d89d24 | 944 | } |
945 | } | |
22d89d24 | 946 | |
f7342052 | 947 | static char ** |
948 | do_setup_env(Session *s, const char *shell) | |
7368a6c8 | 949 | { |
7368a6c8 | 950 | char buf[256]; |
f7342052 | 951 | u_int i, envsize; |
7368a6c8 | 952 | char **env; |
f7342052 | 953 | struct passwd *pw = s->pw; |
7368a6c8 | 954 | |
7368a6c8 | 955 | /* Initialize the environment. */ |
956 | envsize = 100; | |
957 | env = xmalloc(envsize * sizeof(char *)); | |
958 | env[0] = NULL; | |
959 | ||
3c62e7eb | 960 | #ifdef HAVE_CYGWIN |
961 | /* | |
962 | * The Windows environment contains some setting which are | |
963 | * important for a running system. They must not be dropped. | |
964 | */ | |
760b35a6 | 965 | copy_environment(environ, &env, &envsize); |
3c62e7eb | 966 | #endif |
967 | ||
7368a6c8 | 968 | if (!options.use_login) { |
969 | /* Set basic environment. */ | |
970 | child_set_env(&env, &envsize, "USER", pw->pw_name); | |
971 | child_set_env(&env, &envsize, "LOGNAME", pw->pw_name); | |
972 | child_set_env(&env, &envsize, "HOME", pw->pw_dir); | |
2e73a022 | 973 | #ifdef HAVE_LOGIN_CAP |
97686bf9 | 974 | if (setusercontext(lc, pw, pw->pw_uid, LOGIN_SETPATH) < 0) |
975 | child_set_env(&env, &envsize, "PATH", _PATH_STDPATH); | |
976 | else | |
977 | child_set_env(&env, &envsize, "PATH", getenv("PATH")); | |
22d89d24 | 978 | #else /* HAVE_LOGIN_CAP */ |
979 | # ifndef HAVE_CYGWIN | |
3c62e7eb | 980 | /* |
981 | * There's no standard path on Windows. The path contains | |
982 | * important components pointing to the system directories, | |
983 | * needed for loading shared libraries. So the path better | |
984 | * remains intact here. | |
985 | */ | |
06617857 | 986 | # ifdef SUPERUSER_PATH |
987 | child_set_env(&env, &envsize, "PATH", | |
988 | s->pw->pw_uid == 0 ? SUPERUSER_PATH : _PATH_STDPATH); | |
989 | # else | |
7368a6c8 | 990 | child_set_env(&env, &envsize, "PATH", _PATH_STDPATH); |
06617857 | 991 | # endif /* SUPERUSER_PATH */ |
22d89d24 | 992 | # endif /* HAVE_CYGWIN */ |
993 | #endif /* HAVE_LOGIN_CAP */ | |
7368a6c8 | 994 | |
995 | snprintf(buf, sizeof buf, "%.200s/%.50s", | |
996 | _PATH_MAILDIR, pw->pw_name); | |
997 | child_set_env(&env, &envsize, "MAIL", buf); | |
998 | ||
999 | /* Normal systems set SHELL by default. */ | |
1000 | child_set_env(&env, &envsize, "SHELL", shell); | |
1001 | } | |
1002 | if (getenv("TZ")) | |
1003 | child_set_env(&env, &envsize, "TZ", getenv("TZ")); | |
1004 | ||
1005 | /* Set custom environment options from RSA authentication. */ | |
2548961d | 1006 | if (!options.use_login) { |
1007 | while (custom_environment) { | |
1008 | struct envstring *ce = custom_environment; | |
7fdc56c5 | 1009 | char *str = ce->s; |
f7342052 | 1010 | |
7fdc56c5 | 1011 | for (i = 0; str[i] != '=' && str[i]; i++) |
2548961d | 1012 | ; |
7fdc56c5 | 1013 | if (str[i] == '=') { |
1014 | str[i] = 0; | |
1015 | child_set_env(&env, &envsize, str, str + i + 1); | |
2548961d | 1016 | } |
1017 | custom_environment = ce->next; | |
1018 | xfree(ce->s); | |
1019 | xfree(ce); | |
7368a6c8 | 1020 | } |
7368a6c8 | 1021 | } |
1022 | ||
da0561eb | 1023 | /* SSH_CLIENT deprecated */ |
7368a6c8 | 1024 | snprintf(buf, sizeof buf, "%.50s %d %d", |
f7342052 | 1025 | get_remote_ipaddr(), get_remote_port(), get_local_port()); |
7368a6c8 | 1026 | child_set_env(&env, &envsize, "SSH_CLIENT", buf); |
1027 | ||
da0561eb | 1028 | snprintf(buf, sizeof buf, "%.50s %d %.50s %d", |
1029 | get_remote_ipaddr(), get_remote_port(), | |
1030 | get_local_ipaddr(packet_get_connection_in()), get_local_port()); | |
1031 | child_set_env(&env, &envsize, "SSH_CONNECTION", buf); | |
1032 | ||
56b3e9ce | 1033 | if (s->ttyfd != -1) |
1034 | child_set_env(&env, &envsize, "SSH_TTY", s->tty); | |
1035 | if (s->term) | |
1036 | child_set_env(&env, &envsize, "TERM", s->term); | |
1037 | if (s->display) | |
1038 | child_set_env(&env, &envsize, "DISPLAY", s->display); | |
b5e300c2 | 1039 | if (original_command) |
1040 | child_set_env(&env, &envsize, "SSH_ORIGINAL_COMMAND", | |
1041 | original_command); | |
7368a6c8 | 1042 | |
ef51930f | 1043 | #ifdef _UNICOS |
1044 | if (cray_tmpdir[0] != '\0') | |
1045 | child_set_env(&env, &envsize, "TMPDIR", cray_tmpdir); | |
1046 | #endif /* _UNICOS */ | |
1047 | ||
7368a6c8 | 1048 | #ifdef _AIX |
4936fcee | 1049 | { |
1050 | char *cp; | |
1051 | ||
1052 | if ((cp = getenv("AUTHSTATE")) != NULL) | |
1053 | child_set_env(&env, &envsize, "AUTHSTATE", cp); | |
1054 | if ((cp = getenv("KRB5CCNAME")) != NULL) | |
1055 | child_set_env(&env, &envsize, "KRB5CCNAME", cp); | |
1056 | read_environment_file(&env, &envsize, "/etc/environment"); | |
1057 | } | |
7368a6c8 | 1058 | #endif |
7368a6c8 | 1059 | #ifdef KRB4 |
ced49be2 | 1060 | if (s->authctxt->krb4_ticket_file) |
1061 | child_set_env(&env, &envsize, "KRBTKFILE", | |
1062 | s->authctxt->krb4_ticket_file); | |
1063 | #endif | |
1064 | #ifdef KRB5 | |
1065 | if (s->authctxt->krb5_ticket_file) | |
1066 | child_set_env(&env, &envsize, "KRB5CCNAME", | |
1067 | s->authctxt->krb5_ticket_file); | |
1068 | #endif | |
7368a6c8 | 1069 | #ifdef USE_PAM |
ee48c949 | 1070 | /* |
1071 | * Pull in any environment variables that may have | |
1072 | * been set by PAM. | |
1073 | */ | |
1074 | { | |
1075 | char **p; | |
1076 | ||
1077 | p = fetch_pam_environment(); | |
1078 | copy_environment(p, &env, &envsize); | |
1079 | free_pam_environment(p); | |
1080 | } | |
7368a6c8 | 1081 | #endif /* USE_PAM */ |
1082 | ||
149cdb60 | 1083 | if (auth_sock_name != NULL) |
7368a6c8 | 1084 | child_set_env(&env, &envsize, SSH_AUTHSOCKET_ENV_NAME, |
149cdb60 | 1085 | auth_sock_name); |
7368a6c8 | 1086 | |
1087 | /* read $HOME/.ssh/environment. */ | |
f00bab84 | 1088 | if (options.permit_user_env && !options.use_login) { |
71276795 | 1089 | snprintf(buf, sizeof buf, "%.200s/.ssh/environment", |
e2e36358 | 1090 | strcmp(pw->pw_dir, "/") ? pw->pw_dir : ""); |
7368a6c8 | 1091 | read_environment_file(&env, &envsize, buf); |
1092 | } | |
1093 | if (debug_flag) { | |
1094 | /* dump the environment */ | |
1095 | fprintf(stderr, "Environment:\n"); | |
1096 | for (i = 0; env[i]; i++) | |
1097 | fprintf(stderr, " %.200s\n", env[i]); | |
1098 | } | |
f7342052 | 1099 | return env; |
1100 | } | |
1101 | ||
1102 | /* | |
1103 | * Run $HOME/.ssh/rc, /etc/ssh/sshrc, or xauth (whichever is found | |
1104 | * first in this order). | |
1105 | */ | |
1106 | static void | |
1107 | do_rc_files(Session *s, const char *shell) | |
1108 | { | |
1109 | FILE *f = NULL; | |
1110 | char cmd[1024]; | |
1111 | int do_xauth; | |
1112 | struct stat st; | |
1113 | ||
1114 | do_xauth = | |
1115 | s->display != NULL && s->auth_proto != NULL && s->auth_data != NULL; | |
1116 | ||
1117 | /* ignore _PATH_SSH_USER_RC for subsystems */ | |
1118 | if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) { | |
1119 | snprintf(cmd, sizeof cmd, "%s -c '%s %s'", | |
1120 | shell, _PATH_BSHELL, _PATH_SSH_USER_RC); | |
1121 | if (debug_flag) | |
1122 | fprintf(stderr, "Running %s\n", cmd); | |
1123 | f = popen(cmd, "w"); | |
1124 | if (f) { | |
1125 | if (do_xauth) | |
1126 | fprintf(f, "%s %s\n", s->auth_proto, | |
1127 | s->auth_data); | |
1128 | pclose(f); | |
1129 | } else | |
1130 | fprintf(stderr, "Could not run %s\n", | |
1131 | _PATH_SSH_USER_RC); | |
1132 | } else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) { | |
1133 | if (debug_flag) | |
1134 | fprintf(stderr, "Running %s %s\n", _PATH_BSHELL, | |
1135 | _PATH_SSH_SYSTEM_RC); | |
1136 | f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w"); | |
1137 | if (f) { | |
1138 | if (do_xauth) | |
1139 | fprintf(f, "%s %s\n", s->auth_proto, | |
1140 | s->auth_data); | |
1141 | pclose(f); | |
1142 | } else | |
1143 | fprintf(stderr, "Could not run %s\n", | |
1144 | _PATH_SSH_SYSTEM_RC); | |
1145 | } else if (do_xauth && options.xauth_location != NULL) { | |
1146 | /* Add authority data to .Xauthority if appropriate. */ | |
1147 | if (debug_flag) { | |
1148 | fprintf(stderr, | |
fe661d8f | 1149 | "Running %.500s remove %.100s\n", |
1150 | options.xauth_location, s->auth_display); | |
1151 | fprintf(stderr, | |
1152 | "%.500s add %.100s %.100s %.100s\n", | |
f7342052 | 1153 | options.xauth_location, s->auth_display, |
1154 | s->auth_proto, s->auth_data); | |
1155 | } | |
1156 | snprintf(cmd, sizeof cmd, "%s -q -", | |
1157 | options.xauth_location); | |
1158 | f = popen(cmd, "w"); | |
1159 | if (f) { | |
fe661d8f | 1160 | fprintf(f, "remove %s\n", |
1161 | s->auth_display); | |
f7342052 | 1162 | fprintf(f, "add %s %s %s\n", |
1163 | s->auth_display, s->auth_proto, | |
1164 | s->auth_data); | |
1165 | pclose(f); | |
1166 | } else { | |
1167 | fprintf(stderr, "Could not run %s\n", | |
1168 | cmd); | |
1169 | } | |
1170 | } | |
1171 | } | |
1172 | ||
1173 | static void | |
1174 | do_nologin(struct passwd *pw) | |
1175 | { | |
1176 | FILE *f = NULL; | |
1177 | char buf[1024]; | |
1178 | ||
1179 | #ifdef HAVE_LOGIN_CAP | |
1180 | if (!login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid) | |
1181 | f = fopen(login_getcapstr(lc, "nologin", _PATH_NOLOGIN, | |
1182 | _PATH_NOLOGIN), "r"); | |
1183 | #else | |
1184 | if (pw->pw_uid) | |
1185 | f = fopen(_PATH_NOLOGIN, "r"); | |
1186 | #endif | |
1187 | if (f) { | |
1188 | /* /etc/nologin exists. Print its contents and exit. */ | |
8bd4e2ae | 1189 | log("User %.100s not allowed because %s exists", |
1190 | pw->pw_name, _PATH_NOLOGIN); | |
f7342052 | 1191 | while (fgets(buf, sizeof(buf), f)) |
1192 | fputs(buf, stderr); | |
1193 | fclose(f); | |
1194 | exit(254); | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | /* Set login name, uid, gid, and groups. */ | |
1853d1ef | 1199 | void |
f7342052 | 1200 | do_setusercontext(struct passwd *pw) |
1201 | { | |
1202 | #ifdef HAVE_CYGWIN | |
8001948f | 1203 | if (is_winnt) { |
f7342052 | 1204 | #else /* HAVE_CYGWIN */ |
1205 | if (getuid() == 0 || geteuid() == 0) { | |
1206 | #endif /* HAVE_CYGWIN */ | |
8bbfc882 | 1207 | #ifdef HAVE_SETPCRED |
1208 | setpcred(pw->pw_name); | |
1209 | #endif /* HAVE_SETPCRED */ | |
f7342052 | 1210 | #ifdef HAVE_LOGIN_CAP |
2d199535 | 1211 | # ifdef __bsdi__ |
8695f9f7 | 1212 | setpgid(0, 0); |
2d199535 | 1213 | # endif |
f7342052 | 1214 | if (setusercontext(lc, pw, pw->pw_uid, |
1215 | (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) { | |
1216 | perror("unable to set user context"); | |
1217 | exit(1); | |
1218 | } | |
1219 | #else | |
1220 | # if defined(HAVE_GETLUID) && defined(HAVE_SETLUID) | |
1221 | /* Sets login uid for accounting */ | |
1222 | if (getluid() == -1 && setluid(pw->pw_uid) == -1) | |
1223 | error("setluid: %s", strerror(errno)); | |
1224 | # endif /* defined(HAVE_GETLUID) && defined(HAVE_SETLUID) */ | |
1225 | ||
1226 | if (setlogin(pw->pw_name) < 0) | |
1227 | error("setlogin failed: %s", strerror(errno)); | |
1228 | if (setgid(pw->pw_gid) < 0) { | |
1229 | perror("setgid"); | |
1230 | exit(1); | |
1231 | } | |
1232 | /* Initialize the group list. */ | |
1233 | if (initgroups(pw->pw_name, pw->pw_gid) < 0) { | |
1234 | perror("initgroups"); | |
1235 | exit(1); | |
1236 | } | |
1237 | endgrent(); | |
1238 | # ifdef USE_PAM | |
1239 | /* | |
1240 | * PAM credentials may take the form of supplementary groups. | |
1241 | * These will have been wiped by the above initgroups() call. | |
1242 | * Reestablish them here. | |
1243 | */ | |
1244 | do_pam_setcred(0); | |
1245 | # endif /* USE_PAM */ | |
1246 | # if defined(WITH_IRIX_PROJECT) || defined(WITH_IRIX_JOBS) || defined(WITH_IRIX_ARRAY) | |
1247 | irix_setusercontext(pw); | |
1248 | # endif /* defined(WITH_IRIX_PROJECT) || defined(WITH_IRIX_JOBS) || defined(WITH_IRIX_ARRAY) */ | |
e2bc41f9 | 1249 | # ifdef _AIX |
0ba40daa | 1250 | aix_usrinfo(pw); |
e2bc41f9 | 1251 | # endif /* _AIX */ |
f7342052 | 1252 | /* Permanently switch to the desired uid. */ |
1253 | permanently_set_uid(pw); | |
1254 | #endif | |
1255 | } | |
1256 | if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid) | |
1257 | fatal("Failed to set uids to %u.", (u_int) pw->pw_uid); | |
1258 | } | |
1259 | ||
51aeb639 | 1260 | static void |
1853d1ef | 1261 | launch_login(struct passwd *pw, const char *hostname) |
1262 | { | |
1263 | /* Launch login(1). */ | |
1264 | ||
85cc9118 | 1265 | execl(LOGIN_PROGRAM, "login", "-h", hostname, |
1178e8db | 1266 | #ifdef xxxLOGIN_NEEDS_TERM |
875ec275 | 1267 | (s->term ? s->term : "unknown"), |
1853d1ef | 1268 | #endif /* LOGIN_NEEDS_TERM */ |
a2572aa7 | 1269 | #ifdef LOGIN_NO_ENDOPT |
1270 | "-p", "-f", pw->pw_name, (char *)NULL); | |
1271 | #else | |
1853d1ef | 1272 | "-p", "-f", "--", pw->pw_name, (char *)NULL); |
a2572aa7 | 1273 | #endif |
1853d1ef | 1274 | |
1275 | /* Login couldn't be executed, die. */ | |
1276 | ||
1277 | perror("login"); | |
1278 | exit(1); | |
1279 | } | |
1280 | ||
f7342052 | 1281 | /* |
1282 | * Performs common processing for the child, such as setting up the | |
1283 | * environment, closing extra file descriptors, setting the user and group | |
1284 | * ids, and executing the command or shell. | |
1285 | */ | |
1286 | void | |
1287 | do_child(Session *s, const char *command) | |
1288 | { | |
1289 | extern char **environ; | |
1290 | char **env; | |
1291 | char *argv[10]; | |
1292 | const char *shell, *shell0, *hostname = NULL; | |
1293 | struct passwd *pw = s->pw; | |
1294 | u_int i; | |
1295 | ||
1296 | /* remove hostkey from the child's memory */ | |
1297 | destroy_sensitive_data(); | |
1298 | ||
1299 | /* login(1) is only called if we execute the login shell */ | |
1300 | if (options.use_login && command != NULL) | |
1301 | options.use_login = 0; | |
1302 | ||
ef51930f | 1303 | #ifdef _UNICOS |
1304 | cray_setup(pw->pw_uid, pw->pw_name, command); | |
1305 | #endif /* _UNICOS */ | |
1306 | ||
f7342052 | 1307 | /* |
1308 | * Login(1) does this as well, and it needs uid 0 for the "-h" | |
1309 | * switch, so we let login(1) to this for us. | |
1310 | */ | |
1311 | if (!options.use_login) { | |
1312 | #ifdef HAVE_OSF_SIA | |
1313 | session_setup_sia(pw->pw_name, s->ttyfd == -1 ? NULL : s->tty); | |
1314 | if (!check_quietlogin(s, command)) | |
1315 | do_motd(); | |
1316 | #else /* HAVE_OSF_SIA */ | |
1317 | do_nologin(pw); | |
1318 | do_setusercontext(pw); | |
1319 | #endif /* HAVE_OSF_SIA */ | |
1320 | } | |
1321 | ||
1322 | /* | |
1323 | * Get the shell from the password data. An empty shell field is | |
1324 | * legal, and means /bin/sh. | |
1325 | */ | |
1326 | shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell; | |
32214c88 | 1327 | |
1328 | /* | |
1329 | * Make sure $SHELL points to the shell from the password file, | |
1330 | * even if shell is overridden from login.conf | |
1331 | */ | |
1332 | env = do_setup_env(s, shell); | |
1333 | ||
f7342052 | 1334 | #ifdef HAVE_LOGIN_CAP |
1335 | shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell); | |
1336 | #endif | |
1337 | ||
2e73a022 | 1338 | /* we have to stash the hostname before we close our socket. */ |
1339 | if (options.use_login) | |
46e3af7f | 1340 | hostname = get_remote_name_or_ip(utmp_len, |
bf4c5edc | 1341 | options.verify_reverse_mapping); |
7368a6c8 | 1342 | /* |
1343 | * Close the connection descriptors; note that this is the child, and | |
1344 | * the server will still have the socket open, and it is important | |
1345 | * that we do not shutdown it. Note that the descriptors cannot be | |
1346 | * closed before building the environment, as we call | |
1347 | * get_remote_ipaddr there. | |
1348 | */ | |
1349 | if (packet_get_connection_in() == packet_get_connection_out()) | |
1350 | close(packet_get_connection_in()); | |
1351 | else { | |
1352 | close(packet_get_connection_in()); | |
1353 | close(packet_get_connection_out()); | |
1354 | } | |
1355 | /* | |
1356 | * Close all descriptors related to channels. They will still remain | |
1357 | * open in the parent. | |
1358 | */ | |
1359 | /* XXX better use close-on-exec? -markus */ | |
1360 | channel_close_all(); | |
1361 | ||
1362 | /* | |
1363 | * Close any extra file descriptors. Note that there may still be | |
1364 | * descriptors left by system functions. They will be closed later. | |
1365 | */ | |
1366 | endpwent(); | |
1367 | ||
1368 | /* | |
1369 | * Close any extra open file descriptors so that we don\'t have them | |
1370 | * hanging around in clients. Note that we want to do this after | |
1371 | * initgroups, because at least on Solaris 2.3 it leaves file | |
1372 | * descriptors open. | |
1373 | */ | |
1374 | for (i = 3; i < 64; i++) | |
1375 | close(i); | |
1376 | ||
7368a6c8 | 1377 | /* |
2a8a6488 | 1378 | * Must take new environment into use so that .ssh/rc, |
1379 | * /etc/ssh/sshrc and xauth are run in the proper environment. | |
7368a6c8 | 1380 | */ |
1381 | environ = env; | |
1382 | ||
6fcf67f7 | 1383 | #ifdef AFS |
1384 | /* Try to get AFS tokens for the local cell. */ | |
1385 | if (k_hasafs()) { | |
1386 | char cell[64]; | |
184eed6a | 1387 | |
6fcf67f7 | 1388 | if (k_afs_cell_of_file(pw->pw_dir, cell, sizeof(cell)) == 0) |
1389 | krb_afslog(cell, 0); | |
184eed6a | 1390 | |
6fcf67f7 | 1391 | krb_afslog(0, 0); |
1392 | } | |
1393 | #endif /* AFS */ | |
1394 | ||
dab89049 | 1395 | /* Change current directory to the user\'s home directory. */ |
1396 | if (chdir(pw->pw_dir) < 0) { | |
1397 | fprintf(stderr, "Could not chdir to home directory %s: %s\n", | |
1398 | pw->pw_dir, strerror(errno)); | |
1399 | #ifdef HAVE_LOGIN_CAP | |
1400 | if (login_getcapbool(lc, "requirehome", 0)) | |
1401 | exit(1); | |
1402 | #endif | |
1403 | } | |
1404 | ||
f7342052 | 1405 | if (!options.use_login) |
1406 | do_rc_files(s, shell); | |
1d3c30db | 1407 | |
1408 | /* restore SIGPIPE for child */ | |
1409 | signal(SIGPIPE, SIG_DFL); | |
1410 | ||
f7342052 | 1411 | if (options.use_login) { |
1853d1ef | 1412 | launch_login(pw, hostname); |
1413 | /* NEVERREACHED */ | |
f7342052 | 1414 | } |
1415 | ||
1416 | /* Get the last component of the shell name. */ | |
1417 | if ((shell0 = strrchr(shell, '/')) != NULL) | |
1418 | shell0++; | |
1419 | else | |
1420 | shell0 = shell; | |
1421 | ||
7368a6c8 | 1422 | /* |
1423 | * If we have no command, execute the shell. In this case, the shell | |
1424 | * name to be passed in argv[0] is preceded by '-' to indicate that | |
1425 | * this is a login shell. | |
1426 | */ | |
1427 | if (!command) { | |
f7342052 | 1428 | char argv0[256]; |
7368a6c8 | 1429 | |
f7342052 | 1430 | /* Start the shell. Set initial character to '-'. */ |
1431 | argv0[0] = '-'; | |
7368a6c8 | 1432 | |
f7342052 | 1433 | if (strlcpy(argv0 + 1, shell0, sizeof(argv0) - 1) |
1434 | >= sizeof(argv0) - 1) { | |
1435 | errno = EINVAL; | |
7368a6c8 | 1436 | perror(shell); |
1437 | exit(1); | |
f7342052 | 1438 | } |
7368a6c8 | 1439 | |
f7342052 | 1440 | /* Execute the shell. */ |
1441 | argv[0] = argv0; | |
1442 | argv[1] = NULL; | |
1443 | execve(shell, argv, env); | |
7368a6c8 | 1444 | |
f7342052 | 1445 | /* Executing the shell failed. */ |
1446 | perror(shell); | |
1447 | exit(1); | |
7368a6c8 | 1448 | } |
1449 | /* | |
1450 | * Execute the command using the user's shell. This uses the -c | |
1451 | * option to execute the command. | |
1452 | */ | |
f7342052 | 1453 | argv[0] = (char *) shell0; |
7368a6c8 | 1454 | argv[1] = "-c"; |
1455 | argv[2] = (char *) command; | |
1456 | argv[3] = NULL; | |
1457 | execve(shell, argv, env); | |
1458 | perror(shell); | |
1459 | exit(1); | |
1460 | } | |
1461 | ||
1462 | Session * | |
1463 | session_new(void) | |
1464 | { | |
1465 | int i; | |
1466 | static int did_init = 0; | |
1467 | if (!did_init) { | |
1468 | debug("session_new: init"); | |
184eed6a | 1469 | for (i = 0; i < MAX_SESSIONS; i++) { |
7368a6c8 | 1470 | sessions[i].used = 0; |
7368a6c8 | 1471 | } |
1472 | did_init = 1; | |
1473 | } | |
184eed6a | 1474 | for (i = 0; i < MAX_SESSIONS; i++) { |
7368a6c8 | 1475 | Session *s = &sessions[i]; |
1476 | if (! s->used) { | |
690d0d7f | 1477 | memset(s, 0, sizeof(*s)); |
7368a6c8 | 1478 | s->chanid = -1; |
1479 | s->ptyfd = -1; | |
1480 | s->ttyfd = -1; | |
7368a6c8 | 1481 | s->used = 1; |
86066315 | 1482 | s->self = i; |
02323c45 | 1483 | debug("session_new: session %d", i); |
7368a6c8 | 1484 | return s; |
1485 | } | |
1486 | } | |
1487 | return NULL; | |
1488 | } | |
1489 | ||
396c147e | 1490 | static void |
7368a6c8 | 1491 | session_dump(void) |
1492 | { | |
1493 | int i; | |
184eed6a | 1494 | for (i = 0; i < MAX_SESSIONS; i++) { |
7368a6c8 | 1495 | Session *s = &sessions[i]; |
c457707e | 1496 | debug("dump: used %d session %d %p channel %d pid %ld", |
7368a6c8 | 1497 | s->used, |
1498 | s->self, | |
1499 | s, | |
1500 | s->chanid, | |
c457707e | 1501 | (long)s->pid); |
7368a6c8 | 1502 | } |
1503 | } | |
1504 | ||
e78a59f5 | 1505 | int |
57156994 | 1506 | session_open(Authctxt *authctxt, int chanid) |
e78a59f5 | 1507 | { |
1508 | Session *s = session_new(); | |
1509 | debug("session_open: channel %d", chanid); | |
1510 | if (s == NULL) { | |
1511 | error("no more sessions"); | |
1512 | return 0; | |
1513 | } | |
57156994 | 1514 | s->authctxt = authctxt; |
1515 | s->pw = authctxt->pw; | |
e78a59f5 | 1516 | if (s->pw == NULL) |
0725ea77 | 1517 | fatal("no user for session %d", s->self); |
0b242b12 | 1518 | debug("session_open: session %d: link with channel %d", s->self, chanid); |
1519 | s->chanid = chanid; | |
e78a59f5 | 1520 | return 1; |
1521 | } | |
1522 | ||
1853d1ef | 1523 | Session * |
1524 | session_by_tty(char *tty) | |
1525 | { | |
1526 | int i; | |
1527 | for (i = 0; i < MAX_SESSIONS; i++) { | |
1528 | Session *s = &sessions[i]; | |
1529 | if (s->used && s->ttyfd != -1 && strcmp(s->tty, tty) == 0) { | |
1530 | debug("session_by_tty: session %d tty %s", i, tty); | |
1531 | return s; | |
1532 | } | |
1533 | } | |
1534 | debug("session_by_tty: unknown tty %.100s", tty); | |
1535 | session_dump(); | |
1536 | return NULL; | |
1537 | } | |
1538 | ||
396c147e | 1539 | static Session * |
e78a59f5 | 1540 | session_by_channel(int id) |
1541 | { | |
1542 | int i; | |
184eed6a | 1543 | for (i = 0; i < MAX_SESSIONS; i++) { |
e78a59f5 | 1544 | Session *s = &sessions[i]; |
1545 | if (s->used && s->chanid == id) { | |
1546 | debug("session_by_channel: session %d channel %d", i, id); | |
1547 | return s; | |
1548 | } | |
1549 | } | |
1550 | debug("session_by_channel: unknown channel %d", id); | |
1551 | session_dump(); | |
1552 | return NULL; | |
1553 | } | |
1554 | ||
396c147e | 1555 | static Session * |
e78a59f5 | 1556 | session_by_pid(pid_t pid) |
1557 | { | |
1558 | int i; | |
c457707e | 1559 | debug("session_by_pid: pid %ld", (long)pid); |
184eed6a | 1560 | for (i = 0; i < MAX_SESSIONS; i++) { |
e78a59f5 | 1561 | Session *s = &sessions[i]; |
1562 | if (s->used && s->pid == pid) | |
1563 | return s; | |
1564 | } | |
c457707e | 1565 | error("session_by_pid: unknown pid %ld", (long)pid); |
e78a59f5 | 1566 | session_dump(); |
1567 | return NULL; | |
1568 | } | |
1569 | ||
396c147e | 1570 | static int |
e78a59f5 | 1571 | session_window_change_req(Session *s) |
1572 | { | |
1573 | s->col = packet_get_int(); | |
1574 | s->row = packet_get_int(); | |
1575 | s->xpixel = packet_get_int(); | |
1576 | s->ypixel = packet_get_int(); | |
95500969 | 1577 | packet_check_eom(); |
e78a59f5 | 1578 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); |
1579 | return 1; | |
1580 | } | |
1581 | ||
396c147e | 1582 | static int |
e78a59f5 | 1583 | session_pty_req(Session *s) |
1584 | { | |
1e3b8b07 | 1585 | u_int len; |
30dcc918 | 1586 | int n_bytes; |
762715ce | 1587 | |
653d5f86 | 1588 | if (no_pty_flag) { |
1589 | debug("Allocating a pty not permitted for this authentication."); | |
38c295d6 | 1590 | return 0; |
653d5f86 | 1591 | } |
1592 | if (s->ttyfd != -1) { | |
1593 | packet_disconnect("Protocol error: you already have a pty."); | |
6ae2364d | 1594 | return 0; |
653d5f86 | 1595 | } |
ffbf7323 | 1596 | /* Get the time and hostname when the user last logged in. */ |
1597 | if (options.print_lastlog) { | |
1598 | s->hostname[0] = '\0'; | |
1599 | s->last_login_time = get_last_login_time(s->pw->pw_uid, | |
1600 | s->pw->pw_name, s->hostname, sizeof(s->hostname)); | |
1601 | } | |
653d5f86 | 1602 | |
e78a59f5 | 1603 | s->term = packet_get_string(&len); |
653d5f86 | 1604 | |
1605 | if (compat20) { | |
1606 | s->col = packet_get_int(); | |
1607 | s->row = packet_get_int(); | |
1608 | } else { | |
1609 | s->row = packet_get_int(); | |
1610 | s->col = packet_get_int(); | |
1611 | } | |
e78a59f5 | 1612 | s->xpixel = packet_get_int(); |
1613 | s->ypixel = packet_get_int(); | |
1614 | ||
1615 | if (strcmp(s->term, "") == 0) { | |
1616 | xfree(s->term); | |
1617 | s->term = NULL; | |
1618 | } | |
653d5f86 | 1619 | |
e78a59f5 | 1620 | /* Allocate a pty and open it. */ |
653d5f86 | 1621 | debug("Allocating pty."); |
1853d1ef | 1622 | if (!PRIVSEP(pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty)))) { |
653d5f86 | 1623 | if (s->term) |
1624 | xfree(s->term); | |
e78a59f5 | 1625 | s->term = NULL; |
1626 | s->ptyfd = -1; | |
1627 | s->ttyfd = -1; | |
1628 | error("session_pty_req: session %d alloc failed", s->self); | |
6ae2364d | 1629 | return 0; |
e78a59f5 | 1630 | } |
1631 | debug("session_pty_req: session %d alloc %s", s->self, s->tty); | |
653d5f86 | 1632 | |
1633 | /* for SSH1 the tty modes length is not given */ | |
1634 | if (!compat20) | |
1635 | n_bytes = packet_remaining(); | |
1636 | tty_parse_modes(s->ttyfd, &n_bytes); | |
1637 | ||
e78a59f5 | 1638 | /* |
1639 | * Add a cleanup function to clear the utmp entry and record logout | |
1640 | * time in case we call fatal() (e.g., the connection gets closed). | |
1641 | */ | |
86066315 | 1642 | fatal_add_cleanup(session_pty_cleanup, (void *)s); |
1853d1ef | 1643 | if (!use_privsep) |
1644 | pty_setowner(s->pw, s->tty); | |
653d5f86 | 1645 | |
1646 | /* Set window size from the packet. */ | |
e78a59f5 | 1647 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); |
1648 | ||
95500969 | 1649 | packet_check_eom(); |
1d1ffb87 | 1650 | session_proctitle(s); |
e78a59f5 | 1651 | return 1; |
1652 | } | |
1653 | ||
396c147e | 1654 | static int |
0b242b12 | 1655 | session_subsystem_req(Session *s) |
1656 | { | |
01855277 | 1657 | struct stat st; |
1e3b8b07 | 1658 | u_int len; |
0b242b12 | 1659 | int success = 0; |
01855277 | 1660 | char *cmd, *subsys = packet_get_string(&len); |
38c295d6 | 1661 | int i; |
0b242b12 | 1662 | |
95500969 | 1663 | packet_check_eom(); |
8875ca97 | 1664 | log("subsystem request for %.100s", subsys); |
0b242b12 | 1665 | |
38c295d6 | 1666 | for (i = 0; i < options.num_subsystems; i++) { |
01855277 | 1667 | if (strcmp(subsys, options.subsystem_name[i]) == 0) { |
1668 | cmd = options.subsystem_command[i]; | |
1669 | if (stat(cmd, &st) < 0) { | |
1670 | error("subsystem: cannot stat %s: %s", cmd, | |
1671 | strerror(errno)); | |
1672 | break; | |
1673 | } | |
1674 | debug("subsystem: exec() %s", cmd); | |
e5d7a405 | 1675 | s->is_subsystem = 1; |
01855277 | 1676 | do_exec(s, cmd); |
38c295d6 | 1677 | success = 1; |
24932ee9 | 1678 | break; |
38c295d6 | 1679 | } |
1680 | } | |
1681 | ||
1682 | if (!success) | |
8875ca97 | 1683 | log("subsystem request for %.100s failed, subsystem not found", |
01855277 | 1684 | subsys); |
38c295d6 | 1685 | |
0b242b12 | 1686 | xfree(subsys); |
1687 | return success; | |
1688 | } | |
1689 | ||
396c147e | 1690 | static int |
0b242b12 | 1691 | session_x11_req(Session *s) |
1692 | { | |
8dcd9d5c | 1693 | int success; |
0b242b12 | 1694 | |
1695 | s->single_connection = packet_get_char(); | |
1696 | s->auth_proto = packet_get_string(NULL); | |
1697 | s->auth_data = packet_get_string(NULL); | |
1698 | s->screen = packet_get_int(); | |
95500969 | 1699 | packet_check_eom(); |
0b242b12 | 1700 | |
8dcd9d5c | 1701 | success = session_setup_x11fwd(s); |
1702 | if (!success) { | |
0b242b12 | 1703 | xfree(s->auth_proto); |
1704 | xfree(s->auth_data); | |
1500bcdd | 1705 | s->auth_proto = NULL; |
1706 | s->auth_data = NULL; | |
0b242b12 | 1707 | } |
8dcd9d5c | 1708 | return success; |
0b242b12 | 1709 | } |
1710 | ||
396c147e | 1711 | static int |
38c295d6 | 1712 | session_shell_req(Session *s) |
1713 | { | |
95500969 | 1714 | packet_check_eom(); |
dac6753b | 1715 | do_exec(s, NULL); |
38c295d6 | 1716 | return 1; |
1717 | } | |
1718 | ||
396c147e | 1719 | static int |
38c295d6 | 1720 | session_exec_req(Session *s) |
1721 | { | |
1e3b8b07 | 1722 | u_int len; |
38c295d6 | 1723 | char *command = packet_get_string(&len); |
95500969 | 1724 | packet_check_eom(); |
dac6753b | 1725 | do_exec(s, command); |
c95add71 | 1726 | xfree(command); |
38c295d6 | 1727 | return 1; |
1728 | } | |
1729 | ||
396c147e | 1730 | static int |
fa08c86b | 1731 | session_auth_agent_req(Session *s) |
1732 | { | |
1733 | static int called = 0; | |
95500969 | 1734 | packet_check_eom(); |
d343d900 | 1735 | if (no_agent_forwarding_flag) { |
1736 | debug("session_auth_agent_req: no_agent_forwarding_flag"); | |
1737 | return 0; | |
1738 | } | |
fa08c86b | 1739 | if (called) { |
1740 | return 0; | |
1741 | } else { | |
1742 | called = 1; | |
1743 | return auth_input_request_forwarding(s->pw); | |
1744 | } | |
1745 | } | |
1746 | ||
7899c98f | 1747 | int |
1748 | session_input_channel_req(Channel *c, const char *rtype) | |
e78a59f5 | 1749 | { |
e78a59f5 | 1750 | int success = 0; |
e78a59f5 | 1751 | Session *s; |
e78a59f5 | 1752 | |
7899c98f | 1753 | if ((s = session_by_channel(c->self)) == NULL) { |
1754 | log("session_input_channel_req: no session %d req %.100s", | |
1755 | c->self, rtype); | |
1756 | return 0; | |
1757 | } | |
1758 | debug("session_input_channel_req: session %d req %s", s->self, rtype); | |
e78a59f5 | 1759 | |
1760 | /* | |
e5d7a405 | 1761 | * a session is in LARVAL state until a shell, a command |
1762 | * or a subsystem is executed | |
e78a59f5 | 1763 | */ |
1764 | if (c->type == SSH_CHANNEL_LARVAL) { | |
1765 | if (strcmp(rtype, "shell") == 0) { | |
38c295d6 | 1766 | success = session_shell_req(s); |
e78a59f5 | 1767 | } else if (strcmp(rtype, "exec") == 0) { |
38c295d6 | 1768 | success = session_exec_req(s); |
e78a59f5 | 1769 | } else if (strcmp(rtype, "pty-req") == 0) { |
35484284 | 1770 | success = session_pty_req(s); |
0b242b12 | 1771 | } else if (strcmp(rtype, "x11-req") == 0) { |
1772 | success = session_x11_req(s); | |
fa08c86b | 1773 | } else if (strcmp(rtype, "auth-agent-req@openssh.com") == 0) { |
1774 | success = session_auth_agent_req(s); | |
0b242b12 | 1775 | } else if (strcmp(rtype, "subsystem") == 0) { |
1776 | success = session_subsystem_req(s); | |
e78a59f5 | 1777 | } |
1778 | } | |
1779 | if (strcmp(rtype, "window-change") == 0) { | |
1780 | success = session_window_change_req(s); | |
1781 | } | |
7899c98f | 1782 | return success; |
e78a59f5 | 1783 | } |
1784 | ||
1785 | void | |
1786 | session_set_fds(Session *s, int fdin, int fdout, int fderr) | |
1787 | { | |
1788 | if (!compat20) | |
1789 | fatal("session_set_fds: called for proto != 2.0"); | |
1790 | /* | |
1791 | * now that have a child and a pipe to the child, | |
1792 | * we can activate our channel and register the fd's | |
1793 | */ | |
1794 | if (s->chanid == -1) | |
1795 | fatal("no channel for session %d", s->self); | |
1796 | channel_set_fds(s->chanid, | |
1797 | fdout, fdin, fderr, | |
a22aff1f | 1798 | fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ, |
ea9700ba | 1799 | 1, |
1800 | CHAN_SES_WINDOW_DEFAULT); | |
e78a59f5 | 1801 | } |
1802 | ||
86066315 | 1803 | /* |
1804 | * Function to perform pty cleanup. Also called if we get aborted abnormally | |
1805 | * (e.g., due to a dropped connection). | |
1806 | */ | |
1853d1ef | 1807 | void |
1808 | session_pty_cleanup2(void *session) | |
7368a6c8 | 1809 | { |
86066315 | 1810 | Session *s = session; |
1811 | ||
1812 | if (s == NULL) { | |
1813 | error("session_pty_cleanup: no session"); | |
1814 | return; | |
1815 | } | |
1816 | if (s->ttyfd == -1) | |
7368a6c8 | 1817 | return; |
1818 | ||
0725ea77 | 1819 | debug("session_pty_cleanup: session %d release %s", s->self, s->tty); |
7368a6c8 | 1820 | |
7368a6c8 | 1821 | /* Record that the user has logged out. */ |
86066315 | 1822 | if (s->pid != 0) |
f3837bc6 | 1823 | record_logout(s->pid, s->tty, s->pw->pw_name); |
7368a6c8 | 1824 | |
1825 | /* Release the pseudo-tty. */ | |
1853d1ef | 1826 | if (getuid() == 0) |
1827 | pty_release(s->tty); | |
7368a6c8 | 1828 | |
1829 | /* | |
1830 | * Close the server side of the socket pairs. We must do this after | |
1831 | * the pty cleanup, so that another process doesn't get this pty | |
1832 | * while we're still cleaning up. | |
1833 | */ | |
1834 | if (close(s->ptymaster) < 0) | |
1853d1ef | 1835 | error("close(s->ptymaster/%d): %s", s->ptymaster, strerror(errno)); |
efcc9957 | 1836 | |
1837 | /* unlink pty from session */ | |
1838 | s->ttyfd = -1; | |
7368a6c8 | 1839 | } |
e78a59f5 | 1840 | |
1853d1ef | 1841 | void |
1842 | session_pty_cleanup(void *session) | |
1843 | { | |
1844 | PRIVSEP(session_pty_cleanup2(session)); | |
1845 | } | |
1846 | ||
6c723e7c | 1847 | static char * |
1848 | sig2name(int sig) | |
1849 | { | |
1850 | #define SSH_SIG(x) if (sig == SIG ## x) return #x | |
1851 | SSH_SIG(ABRT); | |
1852 | SSH_SIG(ALRM); | |
1853 | SSH_SIG(FPE); | |
1854 | SSH_SIG(HUP); | |
1855 | SSH_SIG(ILL); | |
1856 | SSH_SIG(INT); | |
1857 | SSH_SIG(KILL); | |
1858 | SSH_SIG(PIPE); | |
1859 | SSH_SIG(QUIT); | |
1860 | SSH_SIG(SEGV); | |
1861 | SSH_SIG(TERM); | |
1862 | SSH_SIG(USR1); | |
1863 | SSH_SIG(USR2); | |
1864 | #undef SSH_SIG | |
1865 | return "SIG@openssh.com"; | |
1866 | } | |
1867 | ||
396c147e | 1868 | static void |
e78a59f5 | 1869 | session_exit_message(Session *s, int status) |
1870 | { | |
1871 | Channel *c; | |
5a4ae906 | 1872 | |
1873 | if ((c = channel_lookup(s->chanid)) == NULL) | |
86066315 | 1874 | fatal("session_exit_message: session %d: no channel %d", |
e78a59f5 | 1875 | s->self, s->chanid); |
c457707e | 1876 | debug("session_exit_message: session %d channel %d pid %ld", |
1877 | s->self, s->chanid, (long)s->pid); | |
e78a59f5 | 1878 | |
1879 | if (WIFEXITED(status)) { | |
5a4ae906 | 1880 | channel_request_start(s->chanid, "exit-status", 0); |
e78a59f5 | 1881 | packet_put_int(WEXITSTATUS(status)); |
1882 | packet_send(); | |
1883 | } else if (WIFSIGNALED(status)) { | |
5a4ae906 | 1884 | channel_request_start(s->chanid, "exit-signal", 0); |
6c723e7c | 1885 | packet_put_cstring(sig2name(WTERMSIG(status))); |
a64009ad | 1886 | #ifdef WCOREDUMP |
e78a59f5 | 1887 | packet_put_char(WCOREDUMP(status)); |
a64009ad | 1888 | #else /* WCOREDUMP */ |
1889 | packet_put_char(0); | |
1890 | #endif /* WCOREDUMP */ | |
e78a59f5 | 1891 | packet_put_cstring(""); |
1892 | packet_put_cstring(""); | |
1893 | packet_send(); | |
1894 | } else { | |
1895 | /* Some weird exit cause. Just exit. */ | |
1896 | packet_disconnect("wait returned status %04x.", status); | |
1897 | } | |
1898 | ||
1899 | /* disconnect channel */ | |
1900 | debug("session_exit_message: release channel %d", s->chanid); | |
1901 | channel_cancel_cleanup(s->chanid); | |
9da5c3c9 | 1902 | /* |
1903 | * emulate a write failure with 'chan_write_failed', nobody will be | |
1904 | * interested in data we write. | |
1905 | * Note that we must not call 'chan_read_failed', since there could | |
1906 | * be some more data waiting in the pipe. | |
1907 | */ | |
0b242b12 | 1908 | if (c->ostate != CHAN_OUTPUT_CLOSED) |
1909 | chan_write_failed(c); | |
e78a59f5 | 1910 | s->chanid = -1; |
1911 | } | |
1912 | ||
1853d1ef | 1913 | void |
86066315 | 1914 | session_close(Session *s) |
e78a59f5 | 1915 | { |
c457707e | 1916 | debug("session_close: session %d pid %ld", s->self, (long)s->pid); |
86066315 | 1917 | if (s->ttyfd != -1) { |
1918 | fatal_remove_cleanup(session_pty_cleanup, (void *)s); | |
1919 | session_pty_cleanup(s); | |
1920 | } | |
e78a59f5 | 1921 | if (s->term) |
1922 | xfree(s->term); | |
1923 | if (s->display) | |
1924 | xfree(s->display); | |
f9314d9a | 1925 | if (s->auth_display) |
1926 | xfree(s->auth_display); | |
e78a59f5 | 1927 | if (s->auth_data) |
1928 | xfree(s->auth_data); | |
1929 | if (s->auth_proto) | |
1930 | xfree(s->auth_proto); | |
1931 | s->used = 0; | |
1d1ffb87 | 1932 | session_proctitle(s); |
e78a59f5 | 1933 | } |
1934 | ||
1935 | void | |
1936 | session_close_by_pid(pid_t pid, int status) | |
1937 | { | |
1938 | Session *s = session_by_pid(pid); | |
1939 | if (s == NULL) { | |
c457707e | 1940 | debug("session_close_by_pid: no session for pid %ld", |
1941 | (long)pid); | |
e78a59f5 | 1942 | return; |
1943 | } | |
1944 | if (s->chanid != -1) | |
1945 | session_exit_message(s, status); | |
1946 | session_close(s); | |
1947 | } | |
1948 | ||
1949 | /* | |
1950 | * this is called when a channel dies before | |
1951 | * the session 'child' itself dies | |
1952 | */ | |
1953 | void | |
1954 | session_close_by_channel(int id, void *arg) | |
1955 | { | |
1956 | Session *s = session_by_channel(id); | |
1957 | if (s == NULL) { | |
418e724c | 1958 | debug("session_close_by_channel: no session for id %d", id); |
e78a59f5 | 1959 | return; |
1960 | } | |
c457707e | 1961 | debug("session_close_by_channel: channel %d child %ld", |
1962 | id, (long)s->pid); | |
d5f24f94 | 1963 | if (s->pid != 0) { |
418e724c | 1964 | debug("session_close_by_channel: channel %d: has child", id); |
efcc9957 | 1965 | /* |
1966 | * delay detach of session, but release pty, since | |
1967 | * the fd's to the child are already closed | |
1968 | */ | |
1969 | if (s->ttyfd != -1) { | |
1970 | fatal_remove_cleanup(session_pty_cleanup, (void *)s); | |
1971 | session_pty_cleanup(s); | |
1972 | } | |
418e724c | 1973 | return; |
e78a59f5 | 1974 | } |
418e724c | 1975 | /* detach by removing callback */ |
1976 | channel_cancel_cleanup(s->chanid); | |
1977 | s->chanid = -1; | |
d5f24f94 | 1978 | session_close(s); |
1979 | } | |
1980 | ||
1981 | void | |
1853d1ef | 1982 | session_destroy_all(void (*closefunc)(Session *)) |
d5f24f94 | 1983 | { |
1984 | int i; | |
184eed6a | 1985 | for (i = 0; i < MAX_SESSIONS; i++) { |
d5f24f94 | 1986 | Session *s = &sessions[i]; |
1853d1ef | 1987 | if (s->used) { |
1988 | if (closefunc != NULL) | |
1989 | closefunc(s); | |
1990 | else | |
1991 | session_close(s); | |
1992 | } | |
d5f24f94 | 1993 | } |
e78a59f5 | 1994 | } |
1995 | ||
396c147e | 1996 | static char * |
1d1ffb87 | 1997 | session_tty_list(void) |
1998 | { | |
1999 | static char buf[1024]; | |
2000 | int i; | |
2001 | buf[0] = '\0'; | |
184eed6a | 2002 | for (i = 0; i < MAX_SESSIONS; i++) { |
1d1ffb87 | 2003 | Session *s = &sessions[i]; |
2004 | if (s->used && s->ttyfd != -1) { | |
2005 | if (buf[0] != '\0') | |
2006 | strlcat(buf, ",", sizeof buf); | |
2007 | strlcat(buf, strrchr(s->tty, '/') + 1, sizeof buf); | |
2008 | } | |
2009 | } | |
2010 | if (buf[0] == '\0') | |
2011 | strlcpy(buf, "notty", sizeof buf); | |
2012 | return buf; | |
2013 | } | |
2014 | ||
2015 | void | |
2016 | session_proctitle(Session *s) | |
2017 | { | |
2018 | if (s->pw == NULL) | |
2019 | error("no user for session %d", s->self); | |
2020 | else | |
2021 | setproctitle("%s@%s", s->pw->pw_name, session_tty_list()); | |
2022 | } | |
2023 | ||
8dcd9d5c | 2024 | int |
2025 | session_setup_x11fwd(Session *s) | |
2026 | { | |
8dcd9d5c | 2027 | struct stat st; |
c9d0ad9b | 2028 | char display[512], auth_display[512]; |
2029 | char hostname[MAXHOSTNAMELEN]; | |
8dcd9d5c | 2030 | |
2031 | if (no_x11_forwarding_flag) { | |
2032 | packet_send_debug("X11 forwarding disabled in user configuration file."); | |
2033 | return 0; | |
2034 | } | |
2035 | if (!options.x11_forwarding) { | |
2036 | debug("X11 forwarding disabled in server configuration file."); | |
2037 | return 0; | |
2038 | } | |
2039 | if (!options.xauth_location || | |
2040 | (stat(options.xauth_location, &st) == -1)) { | |
2041 | packet_send_debug("No xauth program; cannot forward with spoofing."); | |
2042 | return 0; | |
2043 | } | |
ff027d84 | 2044 | if (options.use_login) { |
2045 | packet_send_debug("X11 forwarding disabled; " | |
2046 | "not compatible with UseLogin=yes."); | |
2047 | return 0; | |
2048 | } | |
b44de2b1 | 2049 | if (s->display != NULL) { |
8dcd9d5c | 2050 | debug("X11 display already set."); |
2051 | return 0; | |
2052 | } | |
57f228e8 | 2053 | if (x11_create_display_inet(options.x11_display_offset, |
2054 | options.x11_use_localhost, s->single_connection, | |
2055 | &s->display_number) == -1) { | |
b44de2b1 | 2056 | debug("x11_create_display_inet failed."); |
8dcd9d5c | 2057 | return 0; |
2058 | } | |
c9d0ad9b | 2059 | |
2060 | /* Set up a suitable value for the DISPLAY variable. */ | |
2061 | if (gethostname(hostname, sizeof(hostname)) < 0) | |
2062 | fatal("gethostname: %.100s", strerror(errno)); | |
2063 | /* | |
2064 | * auth_display must be used as the displayname when the | |
2065 | * authorization entry is added with xauth(1). This will be | |
2066 | * different than the DISPLAY string for localhost displays. | |
2067 | */ | |
e6e573bd | 2068 | if (options.x11_use_localhost) { |
57f228e8 | 2069 | snprintf(display, sizeof display, "localhost:%u.%u", |
c9d0ad9b | 2070 | s->display_number, s->screen); |
57f228e8 | 2071 | snprintf(auth_display, sizeof auth_display, "unix:%u.%u", |
f9314d9a | 2072 | s->display_number, s->screen); |
c9d0ad9b | 2073 | s->display = xstrdup(display); |
f9314d9a | 2074 | s->auth_display = xstrdup(auth_display); |
c9d0ad9b | 2075 | } else { |
2076 | #ifdef IPADDR_IN_DISPLAY | |
2077 | struct hostent *he; | |
2078 | struct in_addr my_addr; | |
2079 | ||
2080 | he = gethostbyname(hostname); | |
2081 | if (he == NULL) { | |
2082 | error("Can't get IP address for X11 DISPLAY."); | |
2083 | packet_send_debug("Can't get IP address for X11 DISPLAY."); | |
2084 | return 0; | |
2085 | } | |
2086 | memcpy(&my_addr, he->h_addr_list[0], sizeof(struct in_addr)); | |
57f228e8 | 2087 | snprintf(display, sizeof display, "%.50s:%u.%u", inet_ntoa(my_addr), |
c9d0ad9b | 2088 | s->display_number, s->screen); |
2089 | #else | |
57f228e8 | 2090 | snprintf(display, sizeof display, "%.400s:%u.%u", hostname, |
c9d0ad9b | 2091 | s->display_number, s->screen); |
2092 | #endif | |
2093 | s->display = xstrdup(display); | |
f9314d9a | 2094 | s->auth_display = xstrdup(display); |
c9d0ad9b | 2095 | } |
2096 | ||
8dcd9d5c | 2097 | return 1; |
2098 | } | |
2099 | ||
396c147e | 2100 | static void |
59c97189 | 2101 | do_authenticated2(Authctxt *authctxt) |
e78a59f5 | 2102 | { |
57156994 | 2103 | server_loop2(authctxt); |
e78a59f5 | 2104 | } |