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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" | |
5a4ae906 | 36 | RCSID("$OpenBSD: session.c,v 1.124 2002/02/06 14:37:22 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" |
e78a59f5 | 59 | |
3206bb3b | 60 | #ifdef WITH_IRIX_PROJECT |
61 | #include <proj.h> | |
62 | #endif /* WITH_IRIX_PROJECT */ | |
d287c664 | 63 | #ifdef WITH_IRIX_JOBS |
64 | #include <sys/resource.h> | |
2b87da3b | 65 | #endif |
260d427b | 66 | #ifdef WITH_IRIX_AUDIT |
67 | #include <sat.h> | |
68 | #endif /* WITH_IRIX_AUDIT */ | |
3206bb3b | 69 | |
089fbbd2 | 70 | #if defined(HAVE_USERSEC_H) |
71 | #include <usersec.h> | |
72 | #endif | |
73 | ||
3c62e7eb | 74 | #ifdef HAVE_CYGWIN |
75 | #include <windows.h> | |
76 | #include <sys/cygwin.h> | |
77 | #define is_winnt (GetVersion() < 0x80000000) | |
78 | #endif | |
79 | ||
3fcce26c | 80 | /* AIX limits */ |
81 | #if defined(HAVE_GETUSERATTR) && !defined(S_UFSIZE_HARD) && defined(S_UFSIZE) | |
2a2cb9e7 | 82 | # define S_UFSIZE_HARD S_UFSIZE "_hard" |
83 | # define S_UCPU_HARD S_UCPU "_hard" | |
84 | # define S_UDATA_HARD S_UDATA "_hard" | |
85 | # define S_USTACK_HARD S_USTACK "_hard" | |
86 | # define S_URSS_HARD S_URSS "_hard" | |
87 | # define S_UCORE_HARD S_UCORE "_hard" | |
88 | # define S_UNOFILE_HARD S_UNOFILE "_hard" | |
3fcce26c | 89 | #endif |
90 | ||
8a968c25 | 91 | #ifdef _AIX |
92 | # include <uinfo.h> | |
93 | #endif | |
94 | ||
7368a6c8 | 95 | /* types */ |
96 | ||
97 | #define TTYSZ 64 | |
98 | typedef struct Session Session; | |
99 | struct Session { | |
100 | int used; | |
101 | int self; | |
ced49be2 | 102 | struct passwd *pw; |
103 | Authctxt *authctxt; | |
7368a6c8 | 104 | pid_t pid; |
105 | /* tty */ | |
106 | char *term; | |
107 | int ptyfd, ttyfd, ptymaster; | |
108 | int row, col, xpixel, ypixel; | |
109 | char tty[TTYSZ]; | |
110 | /* X11 */ | |
c9d0ad9b | 111 | int display_number; |
7368a6c8 | 112 | char *display; |
113 | int screen; | |
f9314d9a | 114 | char *auth_display; |
7368a6c8 | 115 | char *auth_proto; |
116 | char *auth_data; | |
0b242b12 | 117 | int single_connection; |
7368a6c8 | 118 | /* proto 2 */ |
119 | int chanid; | |
e5d7a405 | 120 | int is_subsystem; |
7368a6c8 | 121 | }; |
122 | ||
123 | /* func */ | |
124 | ||
125 | Session *session_new(void); | |
9c328529 | 126 | void session_set_fds(Session *, int, int, int); |
127 | static void session_pty_cleanup(void *); | |
128 | void session_proctitle(Session *); | |
129 | int session_setup_x11fwd(Session *); | |
130 | void do_exec_pty(Session *, const char *); | |
131 | void do_exec_no_pty(Session *, const char *); | |
132 | void do_exec(Session *, const char *); | |
133 | void do_login(Session *, const char *); | |
8a9ac95d | 134 | #ifdef LOGIN_NEEDS_UTMPX |
135 | static void do_pre_login(Session *s); | |
136 | #endif | |
9c328529 | 137 | void do_child(Session *, const char *); |
f2c2fd71 | 138 | void do_motd(void); |
9c328529 | 139 | int check_quietlogin(Session *, const char *); |
7368a6c8 | 140 | |
396c147e | 141 | static void do_authenticated1(Authctxt *); |
142 | static void do_authenticated2(Authctxt *); | |
9c328529 | 143 | |
396c147e | 144 | static void session_close(Session *); |
145 | static int session_pty_req(Session *); | |
bb5639fe | 146 | |
7368a6c8 | 147 | /* import */ |
148 | extern ServerOptions options; | |
149 | extern char *__progname; | |
150 | extern int log_stderr; | |
151 | extern int debug_flag; | |
1e3b8b07 | 152 | extern u_int utmp_len; |
089fbbd2 | 153 | extern int startup_pipe; |
e78e738a | 154 | extern void destroy_sensitive_data(void); |
089fbbd2 | 155 | |
b5e300c2 | 156 | /* original command from peer. */ |
c95add71 | 157 | const char *original_command = NULL; |
b5e300c2 | 158 | |
7368a6c8 | 159 | /* data */ |
160 | #define MAX_SESSIONS 10 | |
161 | Session sessions[MAX_SESSIONS]; | |
c5d85828 | 162 | |
c1ef8333 | 163 | #ifdef WITH_AIXAUTHENTICATE |
c1ef8333 | 164 | char *aixloginmsg; |
165 | #endif /* WITH_AIXAUTHENTICATE */ | |
7368a6c8 | 166 | |
2e73a022 | 167 | #ifdef HAVE_LOGIN_CAP |
168 | static login_cap_t *lc; | |
169 | #endif | |
170 | ||
bb5639fe | 171 | void |
172 | do_authenticated(Authctxt *authctxt) | |
173 | { | |
174 | /* | |
175 | * Cancel the alarm we set to limit the time taken for | |
176 | * authentication. | |
177 | */ | |
178 | alarm(0); | |
179 | if (startup_pipe != -1) { | |
180 | close(startup_pipe); | |
181 | startup_pipe = -1; | |
182 | } | |
183 | #if defined(HAVE_LOGIN_CAP) && defined(HAVE_PW_CLASS_IN_PASSWD) | |
184 | if ((lc = login_getclass(authctxt->pw->pw_class)) == NULL) { | |
185 | error("unable to get login class"); | |
186 | return; | |
187 | } | |
e78e738a | 188 | #ifdef BSD_AUTH |
189 | if (auth_approval(NULL, lc, authctxt->pw->pw_name, "ssh") <= 0) { | |
190 | packet_disconnect("Approval failure for %s", | |
191 | authctxt->pw->pw_name); | |
192 | } | |
193 | #endif | |
bb5639fe | 194 | #endif |
19e810f6 | 195 | #ifdef WITH_AIXAUTHENTICATE |
196 | /* We don't have a pty yet, so just label the line as "ssh" */ | |
197 | if (loginsuccess(authctxt->user, | |
983784a1 | 198 | get_canonical_hostname(options.verify_reverse_mapping), |
19e810f6 | 199 | "ssh", &aixloginmsg) < 0) |
200 | aixloginmsg = NULL; | |
201 | #endif /* WITH_AIXAUTHENTICATE */ | |
202 | ||
bb5639fe | 203 | /* setup the channel layer */ |
204 | if (!no_port_forwarding_flag && options.allow_tcp_forwarding) | |
205 | channel_permit_all_opens(); | |
206 | ||
207 | if (compat20) | |
208 | do_authenticated2(authctxt); | |
209 | else | |
210 | do_authenticated1(authctxt); | |
e4f7282d | 211 | |
b44de2b1 | 212 | /* remove agent socket */ |
e4f7282d | 213 | if (auth_get_socket_name()) |
f0f32b8e | 214 | auth_sock_cleanup_proc(authctxt->pw); |
ced49be2 | 215 | #ifdef KRB4 |
216 | if (options.kerberos_ticket_cleanup) | |
217 | krb4_cleanup_proc(authctxt); | |
218 | #endif | |
219 | #ifdef KRB5 | |
220 | if (options.kerberos_ticket_cleanup) | |
221 | krb5_cleanup_proc(authctxt); | |
222 | #endif | |
bb5639fe | 223 | } |
224 | ||
7368a6c8 | 225 | /* |
226 | * Prepares for an interactive session. This is called after the user has | |
227 | * been successfully authenticated. During this message exchange, pseudo | |
228 | * terminals are allocated, X11, TCP/IP, and authentication agent forwardings | |
229 | * are requested, etc. | |
230 | */ | |
396c147e | 231 | static void |
bb5639fe | 232 | do_authenticated1(Authctxt *authctxt) |
7368a6c8 | 233 | { |
234 | Session *s; | |
7368a6c8 | 235 | char *command; |
54a5250f | 236 | int success, type, screen_flag; |
bb5639fe | 237 | int compression_level = 0, enable_compression_after_reply = 0; |
1e3b8b07 | 238 | u_int proto_len, data_len, dlen; |
7368a6c8 | 239 | |
240 | s = session_new(); | |
ced49be2 | 241 | s->authctxt = authctxt; |
bb5639fe | 242 | s->pw = authctxt->pw; |
2e73a022 | 243 | |
7368a6c8 | 244 | /* |
245 | * We stay in this loop until the client requests to execute a shell | |
246 | * or a command. | |
247 | */ | |
248 | for (;;) { | |
bb5639fe | 249 | success = 0; |
7368a6c8 | 250 | |
251 | /* Get a packet from the client. */ | |
54a5250f | 252 | type = packet_read(); |
7368a6c8 | 253 | |
254 | /* Process the packet. */ | |
255 | switch (type) { | |
256 | case SSH_CMSG_REQUEST_COMPRESSION: | |
7368a6c8 | 257 | compression_level = packet_get_int(); |
95500969 | 258 | packet_check_eom(); |
7368a6c8 | 259 | if (compression_level < 1 || compression_level > 9) { |
260 | packet_send_debug("Received illegal compression level %d.", | |
184eed6a | 261 | compression_level); |
7368a6c8 | 262 | break; |
263 | } | |
264 | /* Enable compression after we have responded with SUCCESS. */ | |
265 | enable_compression_after_reply = 1; | |
266 | success = 1; | |
267 | break; | |
268 | ||
269 | case SSH_CMSG_REQUEST_PTY: | |
653d5f86 | 270 | success = session_pty_req(s); |
7368a6c8 | 271 | break; |
272 | ||
273 | case SSH_CMSG_X11_REQUEST_FORWARDING: | |
7368a6c8 | 274 | s->auth_proto = packet_get_string(&proto_len); |
275 | s->auth_data = packet_get_string(&data_len); | |
7368a6c8 | 276 | |
2af09193 | 277 | screen_flag = packet_get_protocol_flags() & |
278 | SSH_PROTOFLAG_SCREEN_NUMBER; | |
279 | debug2("SSH_PROTOFLAG_SCREEN_NUMBER: %d", screen_flag); | |
280 | ||
281 | if (packet_remaining() == 4) { | |
282 | if (!screen_flag) | |
283 | debug2("Buggy client: " | |
284 | "X11 screen flag missing"); | |
7368a6c8 | 285 | s->screen = packet_get_int(); |
c8b058b4 | 286 | } else { |
7368a6c8 | 287 | s->screen = 0; |
c8b058b4 | 288 | } |
95500969 | 289 | packet_check_eom(); |
8dcd9d5c | 290 | success = session_setup_x11fwd(s); |
291 | if (!success) { | |
292 | xfree(s->auth_proto); | |
293 | xfree(s->auth_data); | |
1500bcdd | 294 | s->auth_proto = NULL; |
295 | s->auth_data = NULL; | |
7368a6c8 | 296 | } |
7368a6c8 | 297 | break; |
7368a6c8 | 298 | |
299 | case SSH_CMSG_AGENT_REQUEST_FORWARDING: | |
300 | if (no_agent_forwarding_flag || compat13) { | |
301 | debug("Authentication agent forwarding not permitted for this authentication."); | |
302 | break; | |
303 | } | |
304 | debug("Received authentication agent forwarding request."); | |
bb5639fe | 305 | success = auth_input_request_forwarding(s->pw); |
7368a6c8 | 306 | break; |
307 | ||
308 | case SSH_CMSG_PORT_FORWARD_REQUEST: | |
309 | if (no_port_forwarding_flag) { | |
310 | debug("Port forwarding not permitted for this authentication."); | |
311 | break; | |
312 | } | |
33de75a3 | 313 | if (!options.allow_tcp_forwarding) { |
314 | debug("Port forwarding not permitted."); | |
315 | break; | |
316 | } | |
7368a6c8 | 317 | debug("Received TCP/IP port forwarding request."); |
bb5639fe | 318 | channel_input_port_forward_request(s->pw->pw_uid == 0, options.gateway_ports); |
7368a6c8 | 319 | success = 1; |
320 | break; | |
321 | ||
322 | case SSH_CMSG_MAX_PACKET_SIZE: | |
323 | if (packet_set_maxsize(packet_get_int()) > 0) | |
324 | success = 1; | |
325 | break; | |
184eed6a | 326 | |
ced49be2 | 327 | #if defined(AFS) || defined(KRB5) |
328 | case SSH_CMSG_HAVE_KERBEROS_TGT: | |
329 | if (!options.kerberos_tgt_passing) { | |
330 | verbose("Kerberos TGT passing disabled."); | |
331 | } else { | |
332 | char *kdata = packet_get_string(&dlen); | |
95500969 | 333 | packet_check_eom(); |
184eed6a | 334 | |
ced49be2 | 335 | /* XXX - 0x41, see creds_to_radix version */ |
336 | if (kdata[0] != 0x41) { | |
337 | #ifdef KRB5 | |
338 | krb5_data tgt; | |
339 | tgt.data = kdata; | |
340 | tgt.length = dlen; | |
184eed6a | 341 | |
ced49be2 | 342 | if (auth_krb5_tgt(s->authctxt, &tgt)) |
343 | success = 1; | |
344 | else | |
345 | verbose("Kerberos v5 TGT refused for %.100s", s->authctxt->user); | |
346 | #endif /* KRB5 */ | |
347 | } else { | |
348 | #ifdef AFS | |
349 | if (auth_krb4_tgt(s->authctxt, kdata)) | |
350 | success = 1; | |
351 | else | |
352 | verbose("Kerberos v4 TGT refused for %.100s", s->authctxt->user); | |
353 | #endif /* AFS */ | |
354 | } | |
355 | xfree(kdata); | |
356 | } | |
357 | break; | |
358 | #endif /* AFS || KRB5 */ | |
184eed6a | 359 | |
ced49be2 | 360 | #ifdef AFS |
361 | case SSH_CMSG_HAVE_AFS_TOKEN: | |
362 | if (!options.afs_token_passing || !k_hasafs()) { | |
363 | verbose("AFS token passing disabled."); | |
364 | } else { | |
365 | /* Accept AFS token. */ | |
366 | char *token = packet_get_string(&dlen); | |
95500969 | 367 | packet_check_eom(); |
184eed6a | 368 | |
ced49be2 | 369 | if (auth_afs_token(s->authctxt, token)) |
370 | success = 1; | |
371 | else | |
372 | verbose("AFS token refused for %.100s", | |
373 | s->authctxt->user); | |
374 | xfree(token); | |
375 | } | |
376 | break; | |
377 | #endif /* AFS */ | |
7368a6c8 | 378 | |
379 | case SSH_CMSG_EXEC_SHELL: | |
380 | case SSH_CMSG_EXEC_CMD: | |
7368a6c8 | 381 | if (type == SSH_CMSG_EXEC_CMD) { |
382 | command = packet_get_string(&dlen); | |
383 | debug("Exec command '%.500s'", command); | |
c95add71 | 384 | do_exec(s, command); |
385 | xfree(command); | |
7368a6c8 | 386 | } else { |
c95add71 | 387 | do_exec(s, NULL); |
7368a6c8 | 388 | } |
95500969 | 389 | packet_check_eom(); |
fc2a1d28 | 390 | session_close(s); |
7368a6c8 | 391 | return; |
392 | ||
393 | default: | |
394 | /* | |
395 | * Any unknown messages in this phase are ignored, | |
396 | * and a failure message is returned. | |
397 | */ | |
398 | log("Unknown packet type received after authentication: %d", type); | |
399 | } | |
400 | packet_start(success ? SSH_SMSG_SUCCESS : SSH_SMSG_FAILURE); | |
401 | packet_send(); | |
402 | packet_write_wait(); | |
403 | ||
404 | /* Enable compression now that we have replied if appropriate. */ | |
405 | if (enable_compression_after_reply) { | |
406 | enable_compression_after_reply = 0; | |
407 | packet_start_compression(compression_level); | |
408 | } | |
409 | } | |
410 | } | |
411 | ||
412 | /* | |
413 | * This is called to fork and execute a command when we have no tty. This | |
414 | * will call do_child from the child, and server_loop from the parent after | |
415 | * setting up file descriptors and such. | |
416 | */ | |
6ae2364d | 417 | void |
65068d16 | 418 | do_exec_no_pty(Session *s, const char *command) |
7368a6c8 | 419 | { |
420 | int pid; | |
421 | ||
422 | #ifdef USE_PIPES | |
423 | int pin[2], pout[2], perr[2]; | |
424 | /* Allocate pipes for communicating with the program. */ | |
425 | if (pipe(pin) < 0 || pipe(pout) < 0 || pipe(perr) < 0) | |
426 | packet_disconnect("Could not create pipes: %.100s", | |
427 | strerror(errno)); | |
428 | #else /* USE_PIPES */ | |
429 | int inout[2], err[2]; | |
430 | /* Uses socket pairs to communicate with the program. */ | |
431 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) < 0 || | |
432 | socketpair(AF_UNIX, SOCK_STREAM, 0, err) < 0) | |
433 | packet_disconnect("Could not create socket pairs: %.100s", | |
434 | strerror(errno)); | |
435 | #endif /* USE_PIPES */ | |
436 | if (s == NULL) | |
437 | fatal("do_exec_no_pty: no session"); | |
438 | ||
1d1ffb87 | 439 | session_proctitle(s); |
7368a6c8 | 440 | |
b19d61d7 | 441 | #if defined(USE_PAM) |
78220944 | 442 | do_pam_session(s->pw->pw_name, NULL); |
9afbfcfa | 443 | do_pam_setcred(1); |
7eb73cc1 | 444 | if (is_pam_password_change_required()) |
445 | packet_disconnect("Password change required but no " | |
446 | "TTY available"); | |
266140a8 | 447 | #endif /* USE_PAM */ |
448 | ||
7368a6c8 | 449 | /* Fork the child. */ |
450 | if ((pid = fork()) == 0) { | |
451 | /* Child. Reinitialize the log since the pid has changed. */ | |
452 | log_init(__progname, options.log_level, options.log_facility, log_stderr); | |
453 | ||
454 | /* | |
455 | * Create a new session and process group since the 4.4BSD | |
456 | * setlogin() affects the entire process group. | |
457 | */ | |
458 | if (setsid() < 0) | |
459 | error("setsid failed: %.100s", strerror(errno)); | |
460 | ||
461 | #ifdef USE_PIPES | |
462 | /* | |
463 | * Redirect stdin. We close the parent side of the socket | |
464 | * pair, and make the child side the standard input. | |
465 | */ | |
466 | close(pin[1]); | |
467 | if (dup2(pin[0], 0) < 0) | |
468 | perror("dup2 stdin"); | |
469 | close(pin[0]); | |
470 | ||
471 | /* Redirect stdout. */ | |
472 | close(pout[0]); | |
473 | if (dup2(pout[1], 1) < 0) | |
474 | perror("dup2 stdout"); | |
475 | close(pout[1]); | |
476 | ||
477 | /* Redirect stderr. */ | |
478 | close(perr[0]); | |
479 | if (dup2(perr[1], 2) < 0) | |
480 | perror("dup2 stderr"); | |
481 | close(perr[1]); | |
482 | #else /* USE_PIPES */ | |
483 | /* | |
484 | * Redirect stdin, stdout, and stderr. Stdin and stdout will | |
485 | * use the same socket, as some programs (particularly rdist) | |
486 | * seem to depend on it. | |
487 | */ | |
488 | close(inout[1]); | |
489 | close(err[1]); | |
490 | if (dup2(inout[0], 0) < 0) /* stdin */ | |
491 | perror("dup2 stdin"); | |
492 | if (dup2(inout[0], 1) < 0) /* stdout. Note: same socket as stdin. */ | |
493 | perror("dup2 stdout"); | |
494 | if (dup2(err[0], 2) < 0) /* stderr */ | |
495 | perror("dup2 stderr"); | |
496 | #endif /* USE_PIPES */ | |
497 | ||
498 | /* Do processing for the child (exec command etc). */ | |
56b3e9ce | 499 | do_child(s, command); |
7368a6c8 | 500 | /* NOTREACHED */ |
501 | } | |
3c62e7eb | 502 | #ifdef HAVE_CYGWIN |
503 | if (is_winnt) | |
504 | cygwin_set_impersonation_token(INVALID_HANDLE_VALUE); | |
505 | #endif | |
7368a6c8 | 506 | if (pid < 0) |
507 | packet_disconnect("fork failed: %.100s", strerror(errno)); | |
508 | s->pid = pid; | |
b5c334cc | 509 | /* Set interactive/non-interactive mode. */ |
510 | packet_set_interactive(s->display != NULL); | |
7368a6c8 | 511 | #ifdef USE_PIPES |
512 | /* We are the parent. Close the child sides of the pipes. */ | |
513 | close(pin[0]); | |
514 | close(pout[1]); | |
515 | close(perr[1]); | |
516 | ||
e78a59f5 | 517 | if (compat20) { |
e5d7a405 | 518 | session_set_fds(s, pin[1], pout[0], s->is_subsystem ? -1 : perr[0]); |
e78a59f5 | 519 | } else { |
520 | /* Enter the interactive session. */ | |
521 | server_loop(pid, pin[1], pout[0], perr[0]); | |
e5d7a405 | 522 | /* server_loop has closed pin[1], pout[0], and perr[0]. */ |
e78a59f5 | 523 | } |
7368a6c8 | 524 | #else /* USE_PIPES */ |
525 | /* We are the parent. Close the child sides of the socket pairs. */ | |
526 | close(inout[0]); | |
527 | close(err[0]); | |
528 | ||
529 | /* | |
530 | * Enter the interactive session. Note: server_loop must be able to | |
531 | * handle the case that fdin and fdout are the same. | |
532 | */ | |
e78a59f5 | 533 | if (compat20) { |
e5d7a405 | 534 | session_set_fds(s, inout[1], inout[1], s->is_subsystem ? -1 : err[1]); |
e78a59f5 | 535 | } else { |
536 | server_loop(pid, inout[1], inout[1], err[1]); | |
537 | /* server_loop has closed inout[1] and err[1]. */ | |
538 | } | |
7368a6c8 | 539 | #endif /* USE_PIPES */ |
540 | } | |
541 | ||
542 | /* | |
543 | * This is called to fork and execute a command when we have a tty. This | |
544 | * will call do_child from the child, and server_loop from the parent after | |
545 | * setting up file descriptors, controlling tty, updating wtmp, utmp, | |
546 | * lastlog, and other such operations. | |
547 | */ | |
6ae2364d | 548 | void |
65068d16 | 549 | do_exec_pty(Session *s, const char *command) |
7368a6c8 | 550 | { |
7368a6c8 | 551 | int fdout, ptyfd, ttyfd, ptymaster; |
7368a6c8 | 552 | pid_t pid; |
7368a6c8 | 553 | |
554 | if (s == NULL) | |
555 | fatal("do_exec_pty: no session"); | |
556 | ptyfd = s->ptyfd; | |
557 | ttyfd = s->ttyfd; | |
558 | ||
b19d61d7 | 559 | #if defined(USE_PAM) |
bb5639fe | 560 | do_pam_session(s->pw->pw_name, s->tty); |
9afbfcfa | 561 | do_pam_setcred(1); |
27cf96de | 562 | #endif |
266140a8 | 563 | |
7368a6c8 | 564 | /* Fork the child. */ |
565 | if ((pid = fork()) == 0) { | |
57156994 | 566 | |
c345cf9d | 567 | /* Child. Reinitialize the log because the pid has changed. */ |
7368a6c8 | 568 | log_init(__progname, options.log_level, options.log_facility, log_stderr); |
7368a6c8 | 569 | /* Close the master side of the pseudo tty. */ |
570 | close(ptyfd); | |
571 | ||
572 | /* Make the pseudo tty our controlling tty. */ | |
573 | pty_make_controlling_tty(&ttyfd, s->tty); | |
574 | ||
05fd093c | 575 | /* Redirect stdin/stdout/stderr from the pseudo tty. */ |
576 | if (dup2(ttyfd, 0) < 0) | |
577 | error("dup2 stdin: %s", strerror(errno)); | |
578 | if (dup2(ttyfd, 1) < 0) | |
579 | error("dup2 stdout: %s", strerror(errno)); | |
580 | if (dup2(ttyfd, 2) < 0) | |
581 | error("dup2 stderr: %s", strerror(errno)); | |
7368a6c8 | 582 | |
583 | /* Close the extra descriptor for the pseudo tty. */ | |
584 | close(ttyfd); | |
585 | ||
c345cf9d | 586 | /* record login, etc. similar to login(1) */ |
c96a4aaf | 587 | #ifndef HAVE_OSF_SIA |
a22aff1f | 588 | if (!(options.use_login && command == NULL)) |
589 | do_login(s, command); | |
7e2d5fa4 | 590 | # ifdef LOGIN_NEEDS_UTMPX |
591 | else | |
592 | do_pre_login(s); | |
593 | # endif | |
c96a4aaf | 594 | #endif |
7368a6c8 | 595 | |
7368a6c8 | 596 | /* Do common processing for the child, such as execing the command. */ |
56b3e9ce | 597 | do_child(s, command); |
7368a6c8 | 598 | /* NOTREACHED */ |
599 | } | |
3c62e7eb | 600 | #ifdef HAVE_CYGWIN |
601 | if (is_winnt) | |
602 | cygwin_set_impersonation_token(INVALID_HANDLE_VALUE); | |
603 | #endif | |
7368a6c8 | 604 | if (pid < 0) |
605 | packet_disconnect("fork failed: %.100s", strerror(errno)); | |
606 | s->pid = pid; | |
607 | ||
608 | /* Parent. Close the slave side of the pseudo tty. */ | |
609 | close(ttyfd); | |
610 | ||
611 | /* | |
612 | * Create another descriptor of the pty master side for use as the | |
613 | * standard input. We could use the original descriptor, but this | |
614 | * simplifies code in server_loop. The descriptor is bidirectional. | |
615 | */ | |
616 | fdout = dup(ptyfd); | |
617 | if (fdout < 0) | |
618 | packet_disconnect("dup #1 failed: %.100s", strerror(errno)); | |
619 | ||
620 | /* we keep a reference to the pty master */ | |
621 | ptymaster = dup(ptyfd); | |
622 | if (ptymaster < 0) | |
623 | packet_disconnect("dup #2 failed: %.100s", strerror(errno)); | |
624 | s->ptymaster = ptymaster; | |
625 | ||
626 | /* Enter interactive session. */ | |
b5c334cc | 627 | packet_set_interactive(1); |
e78a59f5 | 628 | if (compat20) { |
629 | session_set_fds(s, ptyfd, fdout, -1); | |
630 | } else { | |
631 | server_loop(pid, ptyfd, fdout, -1); | |
632 | /* server_loop _has_ closed ptyfd and fdout. */ | |
e78a59f5 | 633 | } |
7368a6c8 | 634 | } |
635 | ||
7e2d5fa4 | 636 | #ifdef LOGIN_NEEDS_UTMPX |
0e0144b7 | 637 | static void |
7e2d5fa4 | 638 | do_pre_login(Session *s) |
639 | { | |
640 | socklen_t fromlen; | |
641 | struct sockaddr_storage from; | |
642 | pid_t pid = getpid(); | |
643 | ||
644 | /* | |
645 | * Get IP address of client. If the connection is not a socket, let | |
646 | * the address be 0.0.0.0. | |
647 | */ | |
648 | memset(&from, 0, sizeof(from)); | |
649 | if (packet_connection_is_on_socket()) { | |
650 | fromlen = sizeof(from); | |
651 | if (getpeername(packet_get_connection_in(), | |
184eed6a | 652 | (struct sockaddr *) & from, &fromlen) < 0) { |
7e2d5fa4 | 653 | debug("getpeername: %.100s", strerror(errno)); |
654 | fatal_cleanup(); | |
655 | } | |
656 | } | |
657 | ||
658 | record_utmp_only(pid, s->tty, s->pw->pw_name, | |
983784a1 | 659 | get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping), |
7e2d5fa4 | 660 | (struct sockaddr *)&from); |
661 | } | |
662 | #endif | |
663 | ||
dac6753b | 664 | /* |
665 | * This is called to fork and execute a command. If another command is | |
666 | * to be forced, execute that instead. | |
667 | */ | |
668 | void | |
669 | do_exec(Session *s, const char *command) | |
670 | { | |
671 | if (forced_command) { | |
672 | original_command = command; | |
673 | command = forced_command; | |
dac6753b | 674 | debug("Forced command '%.900s'", command); |
675 | } | |
676 | ||
677 | if (s->ttyfd != -1) | |
678 | do_exec_pty(s, command); | |
679 | else | |
680 | do_exec_no_pty(s, command); | |
681 | ||
c95add71 | 682 | original_command = NULL; |
dac6753b | 683 | } |
684 | ||
c345cf9d | 685 | /* administrative, login(1)-like work */ |
686 | void | |
a22aff1f | 687 | do_login(Session *s, const char *command) |
c345cf9d | 688 | { |
c345cf9d | 689 | char *time_string; |
b5e300c2 | 690 | char hostname[MAXHOSTNAMELEN]; |
c345cf9d | 691 | socklen_t fromlen; |
692 | struct sockaddr_storage from; | |
c345cf9d | 693 | time_t last_login_time; |
694 | struct passwd * pw = s->pw; | |
695 | pid_t pid = getpid(); | |
696 | ||
697 | /* | |
698 | * Get IP address of client. If the connection is not a socket, let | |
699 | * the address be 0.0.0.0. | |
700 | */ | |
701 | memset(&from, 0, sizeof(from)); | |
702 | if (packet_connection_is_on_socket()) { | |
703 | fromlen = sizeof(from); | |
704 | if (getpeername(packet_get_connection_in(), | |
705 | (struct sockaddr *) & from, &fromlen) < 0) { | |
706 | debug("getpeername: %.100s", strerror(errno)); | |
707 | fatal_cleanup(); | |
708 | } | |
709 | } | |
710 | ||
bcbf86ec | 711 | /* Get the time and hostname when the user last logged in. */ |
4f4648f9 | 712 | if (options.print_lastlog) { |
713 | hostname[0] = '\0'; | |
714 | last_login_time = get_last_login_time(pw->pw_uid, pw->pw_name, | |
715 | hostname, sizeof(hostname)); | |
716 | } | |
bcbf86ec | 717 | |
c345cf9d | 718 | /* Record that there was a login on that tty from the remote host. */ |
719 | record_login(pid, s->tty, pw->pw_name, pw->pw_uid, | |
bf4c5edc | 720 | get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping), |
46e3af7f | 721 | (struct sockaddr *)&from); |
c345cf9d | 722 | |
2919e060 | 723 | #ifdef USE_PAM |
724 | /* | |
725 | * If password change is needed, do it now. | |
726 | * This needs to occur before the ~/.hushlogin check. | |
727 | */ | |
e11aab29 | 728 | if (is_pam_password_change_required()) { |
2919e060 | 729 | print_pam_messages(); |
730 | do_pam_chauthtok(); | |
731 | } | |
732 | #endif | |
733 | ||
f2c2fd71 | 734 | if (check_quietlogin(s, command)) |
c345cf9d | 735 | return; |
736 | ||
737 | #ifdef USE_PAM | |
e11aab29 | 738 | if (!is_pam_password_change_required()) |
2919e060 | 739 | print_pam_messages(); |
c345cf9d | 740 | #endif /* USE_PAM */ |
741 | #ifdef WITH_AIXAUTHENTICATE | |
742 | if (aixloginmsg && *aixloginmsg) | |
743 | printf("%s\n", aixloginmsg); | |
744 | #endif /* WITH_AIXAUTHENTICATE */ | |
745 | ||
4f4648f9 | 746 | if (options.print_lastlog && last_login_time != 0) { |
c345cf9d | 747 | time_string = ctime(&last_login_time); |
748 | if (strchr(time_string, '\n')) | |
749 | *strchr(time_string, '\n') = 0; | |
f478712e | 750 | if (strcmp(hostname, "") == 0) |
c345cf9d | 751 | printf("Last login: %s\r\n", time_string); |
752 | else | |
bcbf86ec | 753 | printf("Last login: %s from %s\r\n", time_string, hostname); |
c345cf9d | 754 | } |
f2c2fd71 | 755 | |
756 | do_motd(); | |
757 | } | |
758 | ||
759 | /* | |
760 | * Display the message of the day. | |
761 | */ | |
762 | void | |
763 | do_motd(void) | |
764 | { | |
765 | FILE *f; | |
766 | char buf[256]; | |
767 | ||
c345cf9d | 768 | if (options.print_motd) { |
2e73a022 | 769 | #ifdef HAVE_LOGIN_CAP |
770 | f = fopen(login_getcapstr(lc, "welcome", "/etc/motd", | |
771 | "/etc/motd"), "r"); | |
772 | #else | |
c345cf9d | 773 | f = fopen("/etc/motd", "r"); |
2e73a022 | 774 | #endif |
c345cf9d | 775 | if (f) { |
776 | while (fgets(buf, sizeof(buf), f)) | |
777 | fputs(buf, stdout); | |
778 | fclose(f); | |
779 | } | |
780 | } | |
781 | } | |
782 | ||
9c328529 | 783 | |
784 | /* | |
785 | * Check for quiet login, either .hushlogin or command given. | |
786 | */ | |
787 | int | |
788 | check_quietlogin(Session *s, const char *command) | |
789 | { | |
790 | char buf[256]; | |
791 | struct passwd *pw = s->pw; | |
792 | struct stat st; | |
793 | ||
794 | /* Return 1 if .hushlogin exists or a command given. */ | |
795 | if (command != NULL) | |
796 | return 1; | |
797 | snprintf(buf, sizeof(buf), "%.200s/.hushlogin", pw->pw_dir); | |
798 | #ifdef HAVE_LOGIN_CAP | |
799 | if (login_getcapbool(lc, "hushlogin", 0) || stat(buf, &st) >= 0) | |
800 | return 1; | |
801 | #else | |
802 | if (stat(buf, &st) >= 0) | |
803 | return 1; | |
804 | #endif | |
805 | return 0; | |
806 | } | |
807 | ||
7368a6c8 | 808 | /* |
809 | * Sets the value of the given variable in the environment. If the variable | |
810 | * already exists, its value is overriden. | |
811 | */ | |
396c147e | 812 | static void |
1e3b8b07 | 813 | child_set_env(char ***envp, u_int *envsizep, const char *name, |
184eed6a | 814 | const char *value) |
7368a6c8 | 815 | { |
1e3b8b07 | 816 | u_int i, namelen; |
7368a6c8 | 817 | char **env; |
818 | ||
819 | /* | |
820 | * Find the slot where the value should be stored. If the variable | |
821 | * already exists, we reuse the slot; otherwise we append a new slot | |
822 | * at the end of the array, expanding if necessary. | |
823 | */ | |
824 | env = *envp; | |
825 | namelen = strlen(name); | |
826 | for (i = 0; env[i]; i++) | |
827 | if (strncmp(env[i], name, namelen) == 0 && env[i][namelen] == '=') | |
828 | break; | |
829 | if (env[i]) { | |
830 | /* Reuse the slot. */ | |
831 | xfree(env[i]); | |
832 | } else { | |
833 | /* New variable. Expand if necessary. */ | |
834 | if (i >= (*envsizep) - 1) { | |
835 | (*envsizep) += 50; | |
836 | env = (*envp) = xrealloc(env, (*envsizep) * sizeof(char *)); | |
837 | } | |
838 | /* Need to set the NULL pointer at end of array beyond the new slot. */ | |
839 | env[i + 1] = NULL; | |
840 | } | |
841 | ||
842 | /* Allocate space and format the variable in the appropriate slot. */ | |
843 | env[i] = xmalloc(strlen(name) + 1 + strlen(value) + 1); | |
844 | snprintf(env[i], strlen(name) + 1 + strlen(value) + 1, "%s=%s", name, value); | |
845 | } | |
846 | ||
847 | /* | |
848 | * Reads environment variables from the given file and adds/overrides them | |
849 | * into the environment. If the file does not exist, this does nothing. | |
850 | * Otherwise, it must consist of empty lines, comments (line starts with '#') | |
851 | * and assignments of the form name=value. No other forms are allowed. | |
852 | */ | |
396c147e | 853 | static void |
1e3b8b07 | 854 | read_environment_file(char ***env, u_int *envsize, |
184eed6a | 855 | const char *filename) |
7368a6c8 | 856 | { |
857 | FILE *f; | |
858 | char buf[4096]; | |
859 | char *cp, *value; | |
860 | ||
861 | f = fopen(filename, "r"); | |
862 | if (!f) | |
863 | return; | |
864 | ||
865 | while (fgets(buf, sizeof(buf), f)) { | |
866 | for (cp = buf; *cp == ' ' || *cp == '\t'; cp++) | |
867 | ; | |
868 | if (!*cp || *cp == '#' || *cp == '\n') | |
869 | continue; | |
870 | if (strchr(cp, '\n')) | |
871 | *strchr(cp, '\n') = '\0'; | |
872 | value = strchr(cp, '='); | |
873 | if (value == NULL) { | |
874 | fprintf(stderr, "Bad line in %.100s: %.200s\n", filename, buf); | |
875 | continue; | |
876 | } | |
71276795 | 877 | /* |
878 | * Replace the equals sign by nul, and advance value to | |
879 | * the value string. | |
880 | */ | |
7368a6c8 | 881 | *value = '\0'; |
882 | value++; | |
883 | child_set_env(env, envsize, cp, value); | |
884 | } | |
885 | fclose(f); | |
886 | } | |
887 | ||
760b35a6 | 888 | void copy_environment(char **source, char ***env, u_int *envsize) |
7368a6c8 | 889 | { |
760b35a6 | 890 | char *var_name, *var_val; |
7368a6c8 | 891 | int i; |
892 | ||
760b35a6 | 893 | if (source == NULL) |
7368a6c8 | 894 | return; |
2b87da3b | 895 | |
760b35a6 | 896 | for(i = 0; source[i] != NULL; i++) { |
897 | var_name = xstrdup(source[i]); | |
898 | if ((var_val = strstr(var_name, "=")) == NULL) { | |
899 | xfree(var_name); | |
7368a6c8 | 900 | continue; |
7368a6c8 | 901 | } |
760b35a6 | 902 | *var_val++ = '\0'; |
7368a6c8 | 903 | |
760b35a6 | 904 | debug3("Copy environment: %s=%s", var_name, var_val); |
905 | child_set_env(env, envsize, var_name, var_val); | |
906 | ||
907 | xfree(var_name); | |
22d89d24 | 908 | } |
909 | } | |
22d89d24 | 910 | |
5fa45897 | 911 | #if defined(HAVE_GETUSERATTR) |
912 | /* | |
913 | * AIX-specific login initialisation | |
914 | */ | |
915 | void set_limit(char *user, char *soft, char *hard, int resource, int mult) | |
916 | { | |
917 | struct rlimit rlim; | |
56118702 | 918 | int slim, hlim; |
5fa45897 | 919 | |
920 | getrlimit(resource, &rlim); | |
921 | ||
56118702 | 922 | slim = 0; |
923 | if (getuserattr(user, soft, &slim, SEC_INT) != -1) { | |
924 | if (slim < 0) { | |
925 | rlim.rlim_cur = RLIM_INFINITY; | |
926 | } else if (slim != 0) { | |
927 | /* See the wackiness below */ | |
928 | if (rlim.rlim_cur == slim * mult) | |
929 | slim = 0; | |
930 | else | |
931 | rlim.rlim_cur = slim * mult; | |
932 | } | |
933 | } | |
5fa45897 | 934 | |
56118702 | 935 | hlim = 0; |
936 | if (getuserattr(user, hard, &hlim, SEC_INT) != -1) { | |
937 | if (hlim < 0) { | |
938 | rlim.rlim_max = RLIM_INFINITY; | |
939 | } else if (hlim != 0) { | |
940 | rlim.rlim_max = hlim * mult; | |
941 | } | |
942 | } | |
5fa45897 | 943 | |
56118702 | 944 | /* |
945 | * XXX For cpu and fsize the soft limit is set to the hard limit | |
946 | * if the hard limit is left at its default value and the soft limit | |
947 | * is changed from its default value, either by requesting it | |
948 | * (slim == 0) or by setting it to the current default. At least | |
949 | * that's how rlogind does it. If you're confused you're not alone. | |
950 | * Bug or feature? AIX 4.3.1.2 | |
951 | */ | |
952 | if ((!strcmp(soft, "fsize") || !strcmp(soft, "cpu")) | |
953 | && hlim == 0 && slim != 0) | |
954 | rlim.rlim_max = rlim.rlim_cur; | |
955 | /* A specified hard limit limits the soft limit */ | |
956 | else if (hlim > 0 && rlim.rlim_cur > rlim.rlim_max) | |
957 | rlim.rlim_cur = rlim.rlim_max; | |
958 | /* A soft limit can increase a hard limit */ | |
959 | else if (rlim.rlim_cur > rlim.rlim_max) | |
5fa45897 | 960 | rlim.rlim_max = rlim.rlim_cur; |
961 | ||
962 | if (setrlimit(resource, &rlim) != 0) | |
56118702 | 963 | error("setrlimit(%.10s) failed: %.100s", soft, strerror(errno)); |
5fa45897 | 964 | } |
965 | ||
966 | void set_limits_from_userattr(char *user) | |
967 | { | |
968 | int mask; | |
969 | char buf[16]; | |
970 | ||
971 | set_limit(user, S_UFSIZE, S_UFSIZE_HARD, RLIMIT_FSIZE, 512); | |
972 | set_limit(user, S_UCPU, S_UCPU_HARD, RLIMIT_CPU, 1); | |
973 | set_limit(user, S_UDATA, S_UDATA_HARD, RLIMIT_DATA, 512); | |
974 | set_limit(user, S_USTACK, S_USTACK_HARD, RLIMIT_STACK, 512); | |
975 | set_limit(user, S_URSS, S_URSS_HARD, RLIMIT_RSS, 512); | |
976 | set_limit(user, S_UCORE, S_UCORE_HARD, RLIMIT_CORE, 512); | |
977 | #if defined(S_UNOFILE) | |
978 | set_limit(user, S_UNOFILE, S_UNOFILE_HARD, RLIMIT_NOFILE, 1); | |
979 | #endif | |
980 | ||
981 | if (getuserattr(user, S_UMASK, &mask, SEC_INT) != -1) { | |
982 | /* Convert decimal to octal */ | |
983 | (void) snprintf(buf, sizeof(buf), "%d", mask); | |
984 | if (sscanf(buf, "%o", &mask) == 1) | |
985 | umask(mask); | |
986 | } | |
987 | } | |
988 | #endif /* defined(HAVE_GETUSERATTR) */ | |
989 | ||
7368a6c8 | 990 | /* |
991 | * Performs common processing for the child, such as setting up the | |
992 | * environment, closing extra file descriptors, setting the user and group | |
993 | * ids, and executing the command or shell. | |
994 | */ | |
6ae2364d | 995 | void |
56b3e9ce | 996 | do_child(Session *s, const char *command) |
7368a6c8 | 997 | { |
b5e300c2 | 998 | const char *shell, *hostname = NULL, *cp = NULL; |
ced49be2 | 999 | struct passwd *pw = s->pw; |
7368a6c8 | 1000 | char buf[256]; |
6fc1e9f3 | 1001 | char cmd[1024]; |
2e73a022 | 1002 | FILE *f = NULL; |
1e3b8b07 | 1003 | u_int envsize, i; |
7368a6c8 | 1004 | char **env; |
1005 | extern char **environ; | |
1006 | struct stat st; | |
1007 | char *argv[10]; | |
1500bcdd | 1008 | int do_xauth; |
3206bb3b | 1009 | #ifdef WITH_IRIX_PROJECT |
1010 | prid_t projid; | |
1011 | #endif /* WITH_IRIX_PROJECT */ | |
d287c664 | 1012 | #ifdef WITH_IRIX_JOBS |
1013 | jid_t jid = 0; | |
1014 | #else | |
1015 | #ifdef WITH_IRIX_ARRAY | |
1016 | int jid = 0; | |
1017 | #endif /* WITH_IRIX_ARRAY */ | |
1018 | #endif /* WITH_IRIX_JOBS */ | |
1019 | ||
1500bcdd | 1020 | do_xauth = |
1021 | s->display != NULL && s->auth_proto != NULL && s->auth_data != NULL; | |
1022 | ||
e78e738a | 1023 | /* remove hostkey from the child's memory */ |
1024 | destroy_sensitive_data(); | |
1025 | ||
fa649821 | 1026 | /* login(1) is only called if we execute the login shell */ |
1027 | if (options.use_login && command != NULL) | |
1028 | options.use_login = 0; | |
1029 | ||
453b4bd0 | 1030 | #if !defined(HAVE_OSF_SIA) |
2e73a022 | 1031 | if (!options.use_login) { |
1032 | # ifdef HAVE_LOGIN_CAP | |
1033 | if (!login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid) | |
1034 | f = fopen(login_getcapstr(lc, "nologin", _PATH_NOLOGIN, | |
1035 | _PATH_NOLOGIN), "r"); | |
1036 | # else /* HAVE_LOGIN_CAP */ | |
1037 | if (pw->pw_uid) | |
1038 | f = fopen(_PATH_NOLOGIN, "r"); | |
1039 | # endif /* HAVE_LOGIN_CAP */ | |
1040 | if (f) { | |
1041 | /* /etc/nologin exists. Print its contents and exit. */ | |
1042 | while (fgets(buf, sizeof(buf), f)) | |
1043 | fputs(buf, stderr); | |
1044 | fclose(f); | |
7368a6c8 | 1045 | exit(254); |
2e73a022 | 1046 | } |
7368a6c8 | 1047 | } |
453b4bd0 | 1048 | #endif /* HAVE_OSF_SIA */ |
7368a6c8 | 1049 | |
2e73a022 | 1050 | /* Set login name, uid, gid, and groups. */ |
7368a6c8 | 1051 | /* Login(1) does this as well, and it needs uid 0 for the "-h" |
1052 | switch, so we let login(1) to this for us. */ | |
1053 | if (!options.use_login) { | |
4d33e531 | 1054 | #ifdef HAVE_OSF_SIA |
7a7101ec | 1055 | session_setup_sia(pw->pw_name, s->ttyfd == -1 ? NULL : s->tty); |
c96a4aaf | 1056 | if (!check_quietlogin(s, command)) |
1057 | do_motd(); | |
815800e1 | 1058 | #else /* HAVE_OSF_SIA */ |
3c62e7eb | 1059 | #ifdef HAVE_CYGWIN |
1060 | if (is_winnt) { | |
1061 | #else | |
7368a6c8 | 1062 | if (getuid() == 0 || geteuid() == 0) { |
3c62e7eb | 1063 | #endif |
2e73a022 | 1064 | # ifdef HAVE_GETUSERATTR |
5fa45897 | 1065 | set_limits_from_userattr(pw->pw_name); |
2e73a022 | 1066 | # endif /* HAVE_GETUSERATTR */ |
1067 | # ifdef HAVE_LOGIN_CAP | |
1068 | if (setusercontext(lc, pw, pw->pw_uid, | |
1069 | (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) { | |
1070 | perror("unable to set user context"); | |
1071 | exit(1); | |
1072 | } | |
1073 | # else /* HAVE_LOGIN_CAP */ | |
73d6d7fa | 1074 | #if defined(HAVE_GETLUID) && defined(HAVE_SETLUID) |
1075 | /* Sets login uid for accounting */ | |
1076 | if (getluid() == -1 && setluid(pw->pw_uid) == -1) | |
1077 | error("setluid: %s", strerror(errno)); | |
1078 | #endif /* defined(HAVE_GETLUID) && defined(HAVE_SETLUID) */ | |
1079 | ||
2e73a022 | 1080 | if (setlogin(pw->pw_name) < 0) |
1081 | error("setlogin failed: %s", strerror(errno)); | |
7368a6c8 | 1082 | if (setgid(pw->pw_gid) < 0) { |
1083 | perror("setgid"); | |
1084 | exit(1); | |
1085 | } | |
1086 | /* Initialize the group list. */ | |
1087 | if (initgroups(pw->pw_name, pw->pw_gid) < 0) { | |
1088 | perror("initgroups"); | |
1089 | exit(1); | |
1090 | } | |
1091 | endgrent(); | |
9afbfcfa | 1092 | # ifdef USE_PAM |
1093 | /* | |
1094 | * PAM credentials may take the form of | |
1095 | * supplementary groups. These will have been | |
1096 | * wiped by the above initgroups() call. | |
1097 | * Reestablish them here. | |
1098 | */ | |
1099 | do_pam_setcred(0); | |
1100 | # endif /* USE_PAM */ | |
d287c664 | 1101 | # ifdef WITH_IRIX_JOBS |
1102 | jid = jlimit_startjob(pw->pw_name, pw->pw_uid, "interactive"); | |
1103 | if (jid == -1) { | |
1104 | fatal("Failed to create job container: %.100s", | |
1105 | strerror(errno)); | |
2b87da3b | 1106 | } |
d287c664 | 1107 | # endif /* WITH_IRIX_JOBS */ |
2e73a022 | 1108 | # ifdef WITH_IRIX_ARRAY |
3206bb3b | 1109 | /* initialize array session */ |
d287c664 | 1110 | if (jid == 0) { |
1111 | if (newarraysess() != 0) | |
1112 | fatal("Failed to set up new array session: %.100s", | |
1113 | strerror(errno)); | |
1114 | } | |
2e73a022 | 1115 | # endif /* WITH_IRIX_ARRAY */ |
1116 | # ifdef WITH_IRIX_PROJECT | |
3206bb3b | 1117 | /* initialize irix project info */ |
1118 | if ((projid = getdfltprojuser(pw->pw_name)) == -1) { | |
1119 | debug("Failed to get project id, using projid 0"); | |
1120 | projid = 0; | |
1121 | } | |
3206bb3b | 1122 | if (setprid(projid)) |
1123 | fatal("Failed to initialize project %d for %s: %.100s", | |
1124 | (int)projid, pw->pw_name, strerror(errno)); | |
2e73a022 | 1125 | # endif /* WITH_IRIX_PROJECT */ |
260d427b | 1126 | #ifdef WITH_IRIX_AUDIT |
1127 | if (sysconf(_SC_AUDIT)) { | |
1128 | debug("Setting sat id to %d", (int) pw->pw_uid); | |
1129 | if (satsetid(pw->pw_uid)) | |
1130 | debug("error setting satid: %.100s", strerror(errno)); | |
1131 | } | |
1132 | #endif /* WITH_IRIX_AUDIT */ | |
1133 | ||
8a968c25 | 1134 | #ifdef _AIX |
1135 | /* | |
1136 | * AIX has a "usrinfo" area where logname and | |
1137 | * other stuff is stored - a few applications | |
1138 | * actually use this and die if it's not set | |
1139 | */ | |
ee110bfb | 1140 | if (s->ttyfd == -1) |
1141 | s->tty[0] = '\0'; | |
f5f6020e | 1142 | cp = xmalloc(22 + strlen(s->tty) + |
8a968c25 | 1143 | 2 * strlen(pw->pw_name)); |
1144 | i = sprintf(cp, "LOGNAME=%s%cNAME=%s%cTTY=%s%c%c", | |
ee110bfb | 1145 | pw->pw_name, 0, pw->pw_name, 0, s->tty, 0, 0); |
8a968c25 | 1146 | if (usrinfo(SETUINFO, cp, i) == -1) |
1147 | fatal("Couldn't set usrinfo: %s", | |
1148 | strerror(errno)); | |
1149 | debug3("AIX/UsrInfo: set len %d", i); | |
1150 | xfree(cp); | |
1151 | #endif | |
1152 | ||
7368a6c8 | 1153 | /* Permanently switch to the desired uid. */ |
63bd8c36 | 1154 | permanently_set_uid(pw); |
2e73a022 | 1155 | # endif /* HAVE_LOGIN_CAP */ |
7368a6c8 | 1156 | } |
2e73a022 | 1157 | #endif /* HAVE_OSF_SIA */ |
1158 | ||
3c62e7eb | 1159 | #ifdef HAVE_CYGWIN |
1160 | if (is_winnt) | |
1161 | #endif | |
7368a6c8 | 1162 | if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid) |
14a9a859 | 1163 | fatal("Failed to set uids to %u.", (u_int) pw->pw_uid); |
7368a6c8 | 1164 | } |
1165 | /* | |
1166 | * Get the shell from the password data. An empty shell field is | |
1167 | * legal, and means /bin/sh. | |
1168 | */ | |
1169 | shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell; | |
2e73a022 | 1170 | #ifdef HAVE_LOGIN_CAP |
1171 | shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell); | |
1172 | #endif | |
7368a6c8 | 1173 | |
7368a6c8 | 1174 | /* Initialize the environment. */ |
1175 | envsize = 100; | |
1176 | env = xmalloc(envsize * sizeof(char *)); | |
1177 | env[0] = NULL; | |
1178 | ||
3c62e7eb | 1179 | #ifdef HAVE_CYGWIN |
1180 | /* | |
1181 | * The Windows environment contains some setting which are | |
1182 | * important for a running system. They must not be dropped. | |
1183 | */ | |
760b35a6 | 1184 | copy_environment(environ, &env, &envsize); |
3c62e7eb | 1185 | #endif |
1186 | ||
7368a6c8 | 1187 | if (!options.use_login) { |
1188 | /* Set basic environment. */ | |
1189 | child_set_env(&env, &envsize, "USER", pw->pw_name); | |
1190 | child_set_env(&env, &envsize, "LOGNAME", pw->pw_name); | |
1191 | child_set_env(&env, &envsize, "HOME", pw->pw_dir); | |
2e73a022 | 1192 | #ifdef HAVE_LOGIN_CAP |
1193 | (void) setusercontext(lc, pw, pw->pw_uid, LOGIN_SETPATH); | |
1194 | child_set_env(&env, &envsize, "PATH", getenv("PATH")); | |
22d89d24 | 1195 | #else /* HAVE_LOGIN_CAP */ |
1196 | # ifndef HAVE_CYGWIN | |
3c62e7eb | 1197 | /* |
1198 | * There's no standard path on Windows. The path contains | |
1199 | * important components pointing to the system directories, | |
1200 | * needed for loading shared libraries. So the path better | |
1201 | * remains intact here. | |
1202 | */ | |
7368a6c8 | 1203 | child_set_env(&env, &envsize, "PATH", _PATH_STDPATH); |
22d89d24 | 1204 | # endif /* HAVE_CYGWIN */ |
1205 | #endif /* HAVE_LOGIN_CAP */ | |
7368a6c8 | 1206 | |
1207 | snprintf(buf, sizeof buf, "%.200s/%.50s", | |
1208 | _PATH_MAILDIR, pw->pw_name); | |
1209 | child_set_env(&env, &envsize, "MAIL", buf); | |
1210 | ||
1211 | /* Normal systems set SHELL by default. */ | |
1212 | child_set_env(&env, &envsize, "SHELL", shell); | |
1213 | } | |
1214 | if (getenv("TZ")) | |
1215 | child_set_env(&env, &envsize, "TZ", getenv("TZ")); | |
1216 | ||
1217 | /* Set custom environment options from RSA authentication. */ | |
2548961d | 1218 | if (!options.use_login) { |
1219 | while (custom_environment) { | |
1220 | struct envstring *ce = custom_environment; | |
1221 | char *s = ce->s; | |
1222 | int i; | |
1223 | for (i = 0; s[i] != '=' && s[i]; i++) | |
1224 | ; | |
1225 | if (s[i] == '=') { | |
1226 | s[i] = 0; | |
1227 | child_set_env(&env, &envsize, s, s + i + 1); | |
1228 | } | |
1229 | custom_environment = ce->next; | |
1230 | xfree(ce->s); | |
1231 | xfree(ce); | |
7368a6c8 | 1232 | } |
7368a6c8 | 1233 | } |
1234 | ||
1235 | snprintf(buf, sizeof buf, "%.50s %d %d", | |
1236 | get_remote_ipaddr(), get_remote_port(), get_local_port()); | |
1237 | child_set_env(&env, &envsize, "SSH_CLIENT", buf); | |
1238 | ||
56b3e9ce | 1239 | if (s->ttyfd != -1) |
1240 | child_set_env(&env, &envsize, "SSH_TTY", s->tty); | |
1241 | if (s->term) | |
1242 | child_set_env(&env, &envsize, "TERM", s->term); | |
1243 | if (s->display) | |
1244 | child_set_env(&env, &envsize, "DISPLAY", s->display); | |
b5e300c2 | 1245 | if (original_command) |
1246 | child_set_env(&env, &envsize, "SSH_ORIGINAL_COMMAND", | |
1247 | original_command); | |
7368a6c8 | 1248 | |
1249 | #ifdef _AIX | |
22d89d24 | 1250 | if ((cp = getenv("AUTHSTATE")) != NULL) |
1251 | child_set_env(&env, &envsize, "AUTHSTATE", cp); | |
1252 | if ((cp = getenv("KRB5CCNAME")) != NULL) | |
1253 | child_set_env(&env, &envsize, "KRB5CCNAME", cp); | |
1254 | read_environment_file(&env, &envsize, "/etc/environment"); | |
7368a6c8 | 1255 | #endif |
7368a6c8 | 1256 | #ifdef KRB4 |
ced49be2 | 1257 | if (s->authctxt->krb4_ticket_file) |
1258 | child_set_env(&env, &envsize, "KRBTKFILE", | |
1259 | s->authctxt->krb4_ticket_file); | |
1260 | #endif | |
1261 | #ifdef KRB5 | |
1262 | if (s->authctxt->krb5_ticket_file) | |
1263 | child_set_env(&env, &envsize, "KRB5CCNAME", | |
1264 | s->authctxt->krb5_ticket_file); | |
1265 | #endif | |
7368a6c8 | 1266 | #ifdef USE_PAM |
1267 | /* Pull in any environment variables that may have been set by PAM. */ | |
760b35a6 | 1268 | copy_environment(fetch_pam_environment(), &env, &envsize); |
7368a6c8 | 1269 | #endif /* USE_PAM */ |
1270 | ||
7368a6c8 | 1271 | if (auth_get_socket_name() != NULL) |
1272 | child_set_env(&env, &envsize, SSH_AUTHSOCKET_ENV_NAME, | |
184eed6a | 1273 | auth_get_socket_name()); |
7368a6c8 | 1274 | |
1275 | /* read $HOME/.ssh/environment. */ | |
1276 | if (!options.use_login) { | |
71276795 | 1277 | snprintf(buf, sizeof buf, "%.200s/.ssh/environment", |
1278 | pw->pw_dir); | |
7368a6c8 | 1279 | read_environment_file(&env, &envsize, buf); |
1280 | } | |
1281 | if (debug_flag) { | |
1282 | /* dump the environment */ | |
1283 | fprintf(stderr, "Environment:\n"); | |
1284 | for (i = 0; env[i]; i++) | |
1285 | fprintf(stderr, " %.200s\n", env[i]); | |
1286 | } | |
2e73a022 | 1287 | /* we have to stash the hostname before we close our socket. */ |
1288 | if (options.use_login) | |
46e3af7f | 1289 | hostname = get_remote_name_or_ip(utmp_len, |
bf4c5edc | 1290 | options.verify_reverse_mapping); |
7368a6c8 | 1291 | /* |
1292 | * Close the connection descriptors; note that this is the child, and | |
1293 | * the server will still have the socket open, and it is important | |
1294 | * that we do not shutdown it. Note that the descriptors cannot be | |
1295 | * closed before building the environment, as we call | |
1296 | * get_remote_ipaddr there. | |
1297 | */ | |
1298 | if (packet_get_connection_in() == packet_get_connection_out()) | |
1299 | close(packet_get_connection_in()); | |
1300 | else { | |
1301 | close(packet_get_connection_in()); | |
1302 | close(packet_get_connection_out()); | |
1303 | } | |
1304 | /* | |
1305 | * Close all descriptors related to channels. They will still remain | |
1306 | * open in the parent. | |
1307 | */ | |
1308 | /* XXX better use close-on-exec? -markus */ | |
1309 | channel_close_all(); | |
1310 | ||
1311 | /* | |
1312 | * Close any extra file descriptors. Note that there may still be | |
1313 | * descriptors left by system functions. They will be closed later. | |
1314 | */ | |
1315 | endpwent(); | |
1316 | ||
1317 | /* | |
1318 | * Close any extra open file descriptors so that we don\'t have them | |
1319 | * hanging around in clients. Note that we want to do this after | |
1320 | * initgroups, because at least on Solaris 2.3 it leaves file | |
1321 | * descriptors open. | |
1322 | */ | |
1323 | for (i = 3; i < 64; i++) | |
1324 | close(i); | |
1325 | ||
7368a6c8 | 1326 | /* |
1327 | * Must take new environment into use so that .ssh/rc, /etc/sshrc and | |
1328 | * xauth are run in the proper environment. | |
1329 | */ | |
1330 | environ = env; | |
1331 | ||
6fcf67f7 | 1332 | #ifdef AFS |
1333 | /* Try to get AFS tokens for the local cell. */ | |
1334 | if (k_hasafs()) { | |
1335 | char cell[64]; | |
184eed6a | 1336 | |
6fcf67f7 | 1337 | if (k_afs_cell_of_file(pw->pw_dir, cell, sizeof(cell)) == 0) |
1338 | krb_afslog(cell, 0); | |
184eed6a | 1339 | |
6fcf67f7 | 1340 | krb_afslog(0, 0); |
1341 | } | |
1342 | #endif /* AFS */ | |
1343 | ||
dab89049 | 1344 | /* Change current directory to the user\'s home directory. */ |
1345 | if (chdir(pw->pw_dir) < 0) { | |
1346 | fprintf(stderr, "Could not chdir to home directory %s: %s\n", | |
1347 | pw->pw_dir, strerror(errno)); | |
1348 | #ifdef HAVE_LOGIN_CAP | |
1349 | if (login_getcapbool(lc, "requirehome", 0)) | |
1350 | exit(1); | |
1351 | #endif | |
1352 | } | |
1353 | ||
7368a6c8 | 1354 | /* |
1355 | * Run $HOME/.ssh/rc, /etc/sshrc, or xauth (whichever is found first | |
1356 | * in this order). | |
1357 | */ | |
1358 | if (!options.use_login) { | |
e78e738a | 1359 | /* ignore _PATH_SSH_USER_RC for subsystems */ |
1360 | if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) { | |
503e7e5b | 1361 | snprintf(cmd, sizeof cmd, "%s -c '%s %s'", |
1362 | shell, _PATH_BSHELL, _PATH_SSH_USER_RC); | |
7368a6c8 | 1363 | if (debug_flag) |
503e7e5b | 1364 | fprintf(stderr, "Running %s\n", cmd); |
1365 | f = popen(cmd, "w"); | |
7368a6c8 | 1366 | if (f) { |
56b3e9ce | 1367 | if (do_xauth) |
1368 | fprintf(f, "%s %s\n", s->auth_proto, | |
1369 | s->auth_data); | |
7368a6c8 | 1370 | pclose(f); |
1371 | } else | |
96c63318 | 1372 | fprintf(stderr, "Could not run %s\n", |
56b3e9ce | 1373 | _PATH_SSH_USER_RC); |
42f11eb2 | 1374 | } else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) { |
7368a6c8 | 1375 | if (debug_flag) |
56b3e9ce | 1376 | fprintf(stderr, "Running %s %s\n", _PATH_BSHELL, |
1377 | _PATH_SSH_SYSTEM_RC); | |
42f11eb2 | 1378 | f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w"); |
7368a6c8 | 1379 | if (f) { |
56b3e9ce | 1380 | if (do_xauth) |
1381 | fprintf(f, "%s %s\n", s->auth_proto, | |
1382 | s->auth_data); | |
7368a6c8 | 1383 | pclose(f); |
1384 | } else | |
56b3e9ce | 1385 | fprintf(stderr, "Could not run %s\n", |
1386 | _PATH_SSH_SYSTEM_RC); | |
1387 | } else if (do_xauth && options.xauth_location != NULL) { | |
7368a6c8 | 1388 | /* Add authority data to .Xauthority if appropriate. */ |
56b3e9ce | 1389 | if (debug_flag) { |
1390 | fprintf(stderr, | |
1391 | "Running %.100s add " | |
1392 | "%.100s %.100s %.100s\n", | |
f9314d9a | 1393 | options.xauth_location, s->auth_display, |
56b3e9ce | 1394 | s->auth_proto, s->auth_data); |
56b3e9ce | 1395 | } |
1396 | snprintf(cmd, sizeof cmd, "%s -q -", | |
1397 | options.xauth_location); | |
1398 | f = popen(cmd, "w"); | |
1399 | if (f) { | |
c9d0ad9b | 1400 | fprintf(f, "add %s %s %s\n", |
f9314d9a | 1401 | s->auth_display, s->auth_proto, |
c9d0ad9b | 1402 | s->auth_data); |
56b3e9ce | 1403 | pclose(f); |
1404 | } else { | |
1405 | fprintf(stderr, "Could not run %s\n", | |
1406 | cmd); | |
7368a6c8 | 1407 | } |
1408 | } | |
7368a6c8 | 1409 | /* Get the last component of the shell name. */ |
1410 | cp = strrchr(shell, '/'); | |
1411 | if (cp) | |
1412 | cp++; | |
1413 | else | |
1414 | cp = shell; | |
1415 | } | |
1d3c30db | 1416 | |
1417 | /* restore SIGPIPE for child */ | |
1418 | signal(SIGPIPE, SIG_DFL); | |
1419 | ||
7368a6c8 | 1420 | /* |
1421 | * If we have no command, execute the shell. In this case, the shell | |
1422 | * name to be passed in argv[0] is preceded by '-' to indicate that | |
1423 | * this is a login shell. | |
1424 | */ | |
1425 | if (!command) { | |
1426 | if (!options.use_login) { | |
1427 | char buf[256]; | |
1428 | ||
7368a6c8 | 1429 | /* Start the shell. Set initial character to '-'. */ |
1430 | buf[0] = '-'; | |
74860245 | 1431 | strlcpy(buf + 1, cp, sizeof(buf) - 1); |
7368a6c8 | 1432 | |
1433 | /* Execute the shell. */ | |
1434 | argv[0] = buf; | |
1435 | argv[1] = NULL; | |
1436 | execve(shell, argv, env); | |
1437 | ||
1438 | /* Executing the shell failed. */ | |
1439 | perror(shell); | |
1440 | exit(1); | |
1441 | ||
1442 | } else { | |
1443 | /* Launch login(1). */ | |
1444 | ||
2e73a022 | 1445 | execl(LOGIN_PROGRAM, "login", "-h", hostname, |
7e2d5fa4 | 1446 | #ifdef LOGIN_NEEDS_TERM |
184eed6a | 1447 | s->term? s->term : "unknown", |
7e2d5fa4 | 1448 | #endif |
184eed6a | 1449 | "-p", "-f", "--", pw->pw_name, (char *)NULL); |
7368a6c8 | 1450 | |
1451 | /* Login couldn't be executed, die. */ | |
1452 | ||
1453 | perror("login"); | |
1454 | exit(1); | |
1455 | } | |
1456 | } | |
1457 | /* | |
1458 | * Execute the command using the user's shell. This uses the -c | |
1459 | * option to execute the command. | |
1460 | */ | |
1461 | argv[0] = (char *) cp; | |
1462 | argv[1] = "-c"; | |
1463 | argv[2] = (char *) command; | |
1464 | argv[3] = NULL; | |
1465 | execve(shell, argv, env); | |
1466 | perror(shell); | |
1467 | exit(1); | |
1468 | } | |
1469 | ||
1470 | Session * | |
1471 | session_new(void) | |
1472 | { | |
1473 | int i; | |
1474 | static int did_init = 0; | |
1475 | if (!did_init) { | |
1476 | debug("session_new: init"); | |
184eed6a | 1477 | for (i = 0; i < MAX_SESSIONS; i++) { |
7368a6c8 | 1478 | sessions[i].used = 0; |
7368a6c8 | 1479 | } |
1480 | did_init = 1; | |
1481 | } | |
184eed6a | 1482 | for (i = 0; i < MAX_SESSIONS; i++) { |
7368a6c8 | 1483 | Session *s = &sessions[i]; |
1484 | if (! s->used) { | |
690d0d7f | 1485 | memset(s, 0, sizeof(*s)); |
7368a6c8 | 1486 | s->chanid = -1; |
1487 | s->ptyfd = -1; | |
1488 | s->ttyfd = -1; | |
7368a6c8 | 1489 | s->used = 1; |
86066315 | 1490 | s->self = i; |
02323c45 | 1491 | debug("session_new: session %d", i); |
7368a6c8 | 1492 | return s; |
1493 | } | |
1494 | } | |
1495 | return NULL; | |
1496 | } | |
1497 | ||
396c147e | 1498 | static void |
7368a6c8 | 1499 | session_dump(void) |
1500 | { | |
1501 | int i; | |
184eed6a | 1502 | for (i = 0; i < MAX_SESSIONS; i++) { |
7368a6c8 | 1503 | Session *s = &sessions[i]; |
1504 | debug("dump: used %d session %d %p channel %d pid %d", | |
1505 | s->used, | |
1506 | s->self, | |
1507 | s, | |
1508 | s->chanid, | |
1509 | s->pid); | |
1510 | } | |
1511 | } | |
1512 | ||
e78a59f5 | 1513 | int |
57156994 | 1514 | session_open(Authctxt *authctxt, int chanid) |
e78a59f5 | 1515 | { |
1516 | Session *s = session_new(); | |
1517 | debug("session_open: channel %d", chanid); | |
1518 | if (s == NULL) { | |
1519 | error("no more sessions"); | |
1520 | return 0; | |
1521 | } | |
57156994 | 1522 | s->authctxt = authctxt; |
1523 | s->pw = authctxt->pw; | |
e78a59f5 | 1524 | if (s->pw == NULL) |
0725ea77 | 1525 | fatal("no user for session %d", s->self); |
0b242b12 | 1526 | debug("session_open: session %d: link with channel %d", s->self, chanid); |
1527 | s->chanid = chanid; | |
e78a59f5 | 1528 | return 1; |
1529 | } | |
1530 | ||
396c147e | 1531 | static Session * |
e78a59f5 | 1532 | session_by_channel(int id) |
1533 | { | |
1534 | int i; | |
184eed6a | 1535 | for (i = 0; i < MAX_SESSIONS; i++) { |
e78a59f5 | 1536 | Session *s = &sessions[i]; |
1537 | if (s->used && s->chanid == id) { | |
1538 | debug("session_by_channel: session %d channel %d", i, id); | |
1539 | return s; | |
1540 | } | |
1541 | } | |
1542 | debug("session_by_channel: unknown channel %d", id); | |
1543 | session_dump(); | |
1544 | return NULL; | |
1545 | } | |
1546 | ||
396c147e | 1547 | static Session * |
e78a59f5 | 1548 | session_by_pid(pid_t pid) |
1549 | { | |
1550 | int i; | |
1551 | debug("session_by_pid: pid %d", pid); | |
184eed6a | 1552 | for (i = 0; i < MAX_SESSIONS; i++) { |
e78a59f5 | 1553 | Session *s = &sessions[i]; |
1554 | if (s->used && s->pid == pid) | |
1555 | return s; | |
1556 | } | |
1557 | error("session_by_pid: unknown pid %d", pid); | |
1558 | session_dump(); | |
1559 | return NULL; | |
1560 | } | |
1561 | ||
396c147e | 1562 | static int |
e78a59f5 | 1563 | session_window_change_req(Session *s) |
1564 | { | |
1565 | s->col = packet_get_int(); | |
1566 | s->row = packet_get_int(); | |
1567 | s->xpixel = packet_get_int(); | |
1568 | s->ypixel = packet_get_int(); | |
95500969 | 1569 | packet_check_eom(); |
e78a59f5 | 1570 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); |
1571 | return 1; | |
1572 | } | |
1573 | ||
396c147e | 1574 | static int |
e78a59f5 | 1575 | session_pty_req(Session *s) |
1576 | { | |
1e3b8b07 | 1577 | u_int len; |
30dcc918 | 1578 | int n_bytes; |
e78a59f5 | 1579 | |
653d5f86 | 1580 | if (no_pty_flag) { |
1581 | debug("Allocating a pty not permitted for this authentication."); | |
38c295d6 | 1582 | return 0; |
653d5f86 | 1583 | } |
1584 | if (s->ttyfd != -1) { | |
1585 | packet_disconnect("Protocol error: you already have a pty."); | |
6ae2364d | 1586 | return 0; |
653d5f86 | 1587 | } |
1588 | ||
e78a59f5 | 1589 | s->term = packet_get_string(&len); |
653d5f86 | 1590 | |
1591 | if (compat20) { | |
1592 | s->col = packet_get_int(); | |
1593 | s->row = packet_get_int(); | |
1594 | } else { | |
1595 | s->row = packet_get_int(); | |
1596 | s->col = packet_get_int(); | |
1597 | } | |
e78a59f5 | 1598 | s->xpixel = packet_get_int(); |
1599 | s->ypixel = packet_get_int(); | |
1600 | ||
1601 | if (strcmp(s->term, "") == 0) { | |
1602 | xfree(s->term); | |
1603 | s->term = NULL; | |
1604 | } | |
653d5f86 | 1605 | |
e78a59f5 | 1606 | /* Allocate a pty and open it. */ |
653d5f86 | 1607 | debug("Allocating pty."); |
e78a59f5 | 1608 | if (!pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty))) { |
653d5f86 | 1609 | if (s->term) |
1610 | xfree(s->term); | |
e78a59f5 | 1611 | s->term = NULL; |
1612 | s->ptyfd = -1; | |
1613 | s->ttyfd = -1; | |
1614 | error("session_pty_req: session %d alloc failed", s->self); | |
6ae2364d | 1615 | return 0; |
e78a59f5 | 1616 | } |
1617 | debug("session_pty_req: session %d alloc %s", s->self, s->tty); | |
653d5f86 | 1618 | |
1619 | /* for SSH1 the tty modes length is not given */ | |
1620 | if (!compat20) | |
1621 | n_bytes = packet_remaining(); | |
1622 | tty_parse_modes(s->ttyfd, &n_bytes); | |
1623 | ||
e78a59f5 | 1624 | /* |
1625 | * Add a cleanup function to clear the utmp entry and record logout | |
1626 | * time in case we call fatal() (e.g., the connection gets closed). | |
1627 | */ | |
86066315 | 1628 | fatal_add_cleanup(session_pty_cleanup, (void *)s); |
e78a59f5 | 1629 | pty_setowner(s->pw, s->tty); |
653d5f86 | 1630 | |
1631 | /* Set window size from the packet. */ | |
e78a59f5 | 1632 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); |
1633 | ||
95500969 | 1634 | packet_check_eom(); |
1d1ffb87 | 1635 | session_proctitle(s); |
e78a59f5 | 1636 | return 1; |
1637 | } | |
1638 | ||
396c147e | 1639 | static int |
0b242b12 | 1640 | session_subsystem_req(Session *s) |
1641 | { | |
01855277 | 1642 | struct stat st; |
1e3b8b07 | 1643 | u_int len; |
0b242b12 | 1644 | int success = 0; |
01855277 | 1645 | char *cmd, *subsys = packet_get_string(&len); |
38c295d6 | 1646 | int i; |
0b242b12 | 1647 | |
95500969 | 1648 | packet_check_eom(); |
8875ca97 | 1649 | log("subsystem request for %.100s", subsys); |
0b242b12 | 1650 | |
38c295d6 | 1651 | for (i = 0; i < options.num_subsystems; i++) { |
01855277 | 1652 | if (strcmp(subsys, options.subsystem_name[i]) == 0) { |
1653 | cmd = options.subsystem_command[i]; | |
1654 | if (stat(cmd, &st) < 0) { | |
1655 | error("subsystem: cannot stat %s: %s", cmd, | |
1656 | strerror(errno)); | |
1657 | break; | |
1658 | } | |
1659 | debug("subsystem: exec() %s", cmd); | |
e5d7a405 | 1660 | s->is_subsystem = 1; |
01855277 | 1661 | do_exec(s, cmd); |
38c295d6 | 1662 | success = 1; |
24932ee9 | 1663 | break; |
38c295d6 | 1664 | } |
1665 | } | |
1666 | ||
1667 | if (!success) | |
8875ca97 | 1668 | log("subsystem request for %.100s failed, subsystem not found", |
01855277 | 1669 | subsys); |
38c295d6 | 1670 | |
0b242b12 | 1671 | xfree(subsys); |
1672 | return success; | |
1673 | } | |
1674 | ||
396c147e | 1675 | static int |
0b242b12 | 1676 | session_x11_req(Session *s) |
1677 | { | |
8dcd9d5c | 1678 | int success; |
0b242b12 | 1679 | |
1680 | s->single_connection = packet_get_char(); | |
1681 | s->auth_proto = packet_get_string(NULL); | |
1682 | s->auth_data = packet_get_string(NULL); | |
1683 | s->screen = packet_get_int(); | |
95500969 | 1684 | packet_check_eom(); |
0b242b12 | 1685 | |
8dcd9d5c | 1686 | success = session_setup_x11fwd(s); |
1687 | if (!success) { | |
0b242b12 | 1688 | xfree(s->auth_proto); |
1689 | xfree(s->auth_data); | |
1500bcdd | 1690 | s->auth_proto = NULL; |
1691 | s->auth_data = NULL; | |
0b242b12 | 1692 | } |
8dcd9d5c | 1693 | return success; |
0b242b12 | 1694 | } |
1695 | ||
396c147e | 1696 | static int |
38c295d6 | 1697 | session_shell_req(Session *s) |
1698 | { | |
95500969 | 1699 | packet_check_eom(); |
dac6753b | 1700 | do_exec(s, NULL); |
38c295d6 | 1701 | return 1; |
1702 | } | |
1703 | ||
396c147e | 1704 | static int |
38c295d6 | 1705 | session_exec_req(Session *s) |
1706 | { | |
1e3b8b07 | 1707 | u_int len; |
38c295d6 | 1708 | char *command = packet_get_string(&len); |
95500969 | 1709 | packet_check_eom(); |
dac6753b | 1710 | do_exec(s, command); |
c95add71 | 1711 | xfree(command); |
38c295d6 | 1712 | return 1; |
1713 | } | |
1714 | ||
396c147e | 1715 | static int |
fa08c86b | 1716 | session_auth_agent_req(Session *s) |
1717 | { | |
1718 | static int called = 0; | |
95500969 | 1719 | packet_check_eom(); |
d343d900 | 1720 | if (no_agent_forwarding_flag) { |
1721 | debug("session_auth_agent_req: no_agent_forwarding_flag"); | |
1722 | return 0; | |
1723 | } | |
fa08c86b | 1724 | if (called) { |
1725 | return 0; | |
1726 | } else { | |
1727 | called = 1; | |
1728 | return auth_input_request_forwarding(s->pw); | |
1729 | } | |
1730 | } | |
1731 | ||
7899c98f | 1732 | int |
1733 | session_input_channel_req(Channel *c, const char *rtype) | |
e78a59f5 | 1734 | { |
e78a59f5 | 1735 | int success = 0; |
e78a59f5 | 1736 | Session *s; |
e78a59f5 | 1737 | |
7899c98f | 1738 | if ((s = session_by_channel(c->self)) == NULL) { |
1739 | log("session_input_channel_req: no session %d req %.100s", | |
1740 | c->self, rtype); | |
1741 | return 0; | |
1742 | } | |
1743 | debug("session_input_channel_req: session %d req %s", s->self, rtype); | |
e78a59f5 | 1744 | |
1745 | /* | |
e5d7a405 | 1746 | * a session is in LARVAL state until a shell, a command |
1747 | * or a subsystem is executed | |
e78a59f5 | 1748 | */ |
1749 | if (c->type == SSH_CHANNEL_LARVAL) { | |
1750 | if (strcmp(rtype, "shell") == 0) { | |
38c295d6 | 1751 | success = session_shell_req(s); |
e78a59f5 | 1752 | } else if (strcmp(rtype, "exec") == 0) { |
38c295d6 | 1753 | success = session_exec_req(s); |
e78a59f5 | 1754 | } else if (strcmp(rtype, "pty-req") == 0) { |
35484284 | 1755 | success = session_pty_req(s); |
0b242b12 | 1756 | } else if (strcmp(rtype, "x11-req") == 0) { |
1757 | success = session_x11_req(s); | |
fa08c86b | 1758 | } else if (strcmp(rtype, "auth-agent-req@openssh.com") == 0) { |
1759 | success = session_auth_agent_req(s); | |
0b242b12 | 1760 | } else if (strcmp(rtype, "subsystem") == 0) { |
1761 | success = session_subsystem_req(s); | |
e78a59f5 | 1762 | } |
1763 | } | |
1764 | if (strcmp(rtype, "window-change") == 0) { | |
1765 | success = session_window_change_req(s); | |
1766 | } | |
7899c98f | 1767 | return success; |
e78a59f5 | 1768 | } |
1769 | ||
1770 | void | |
1771 | session_set_fds(Session *s, int fdin, int fdout, int fderr) | |
1772 | { | |
1773 | if (!compat20) | |
1774 | fatal("session_set_fds: called for proto != 2.0"); | |
1775 | /* | |
1776 | * now that have a child and a pipe to the child, | |
1777 | * we can activate our channel and register the fd's | |
1778 | */ | |
1779 | if (s->chanid == -1) | |
1780 | fatal("no channel for session %d", s->self); | |
1781 | channel_set_fds(s->chanid, | |
1782 | fdout, fdin, fderr, | |
a22aff1f | 1783 | fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ, |
1784 | 1); | |
e78a59f5 | 1785 | } |
1786 | ||
86066315 | 1787 | /* |
1788 | * Function to perform pty cleanup. Also called if we get aborted abnormally | |
1789 | * (e.g., due to a dropped connection). | |
1790 | */ | |
396c147e | 1791 | static void |
86066315 | 1792 | session_pty_cleanup(void *session) |
7368a6c8 | 1793 | { |
86066315 | 1794 | Session *s = session; |
1795 | ||
1796 | if (s == NULL) { | |
1797 | error("session_pty_cleanup: no session"); | |
1798 | return; | |
1799 | } | |
1800 | if (s->ttyfd == -1) | |
7368a6c8 | 1801 | return; |
1802 | ||
0725ea77 | 1803 | debug("session_pty_cleanup: session %d release %s", s->self, s->tty); |
7368a6c8 | 1804 | |
7368a6c8 | 1805 | /* Record that the user has logged out. */ |
86066315 | 1806 | if (s->pid != 0) |
1807 | record_logout(s->pid, s->tty); | |
7368a6c8 | 1808 | |
1809 | /* Release the pseudo-tty. */ | |
1810 | pty_release(s->tty); | |
1811 | ||
1812 | /* | |
1813 | * Close the server side of the socket pairs. We must do this after | |
1814 | * the pty cleanup, so that another process doesn't get this pty | |
1815 | * while we're still cleaning up. | |
1816 | */ | |
1817 | if (close(s->ptymaster) < 0) | |
1818 | error("close(s->ptymaster): %s", strerror(errno)); | |
efcc9957 | 1819 | |
1820 | /* unlink pty from session */ | |
1821 | s->ttyfd = -1; | |
7368a6c8 | 1822 | } |
e78a59f5 | 1823 | |
396c147e | 1824 | static void |
e78a59f5 | 1825 | session_exit_message(Session *s, int status) |
1826 | { | |
1827 | Channel *c; | |
5a4ae906 | 1828 | |
1829 | if ((c = channel_lookup(s->chanid)) == NULL) | |
86066315 | 1830 | fatal("session_exit_message: session %d: no channel %d", |
e78a59f5 | 1831 | s->self, s->chanid); |
1832 | debug("session_exit_message: session %d channel %d pid %d", | |
1833 | s->self, s->chanid, s->pid); | |
1834 | ||
1835 | if (WIFEXITED(status)) { | |
5a4ae906 | 1836 | channel_request_start(s->chanid, "exit-status", 0); |
e78a59f5 | 1837 | packet_put_int(WEXITSTATUS(status)); |
1838 | packet_send(); | |
1839 | } else if (WIFSIGNALED(status)) { | |
5a4ae906 | 1840 | channel_request_start(s->chanid, "exit-signal", 0); |
e78a59f5 | 1841 | packet_put_int(WTERMSIG(status)); |
a64009ad | 1842 | #ifdef WCOREDUMP |
e78a59f5 | 1843 | packet_put_char(WCOREDUMP(status)); |
a64009ad | 1844 | #else /* WCOREDUMP */ |
1845 | packet_put_char(0); | |
1846 | #endif /* WCOREDUMP */ | |
e78a59f5 | 1847 | packet_put_cstring(""); |
1848 | packet_put_cstring(""); | |
1849 | packet_send(); | |
1850 | } else { | |
1851 | /* Some weird exit cause. Just exit. */ | |
1852 | packet_disconnect("wait returned status %04x.", status); | |
1853 | } | |
1854 | ||
1855 | /* disconnect channel */ | |
1856 | debug("session_exit_message: release channel %d", s->chanid); | |
1857 | channel_cancel_cleanup(s->chanid); | |
9da5c3c9 | 1858 | /* |
1859 | * emulate a write failure with 'chan_write_failed', nobody will be | |
1860 | * interested in data we write. | |
1861 | * Note that we must not call 'chan_read_failed', since there could | |
1862 | * be some more data waiting in the pipe. | |
1863 | */ | |
0b242b12 | 1864 | if (c->ostate != CHAN_OUTPUT_CLOSED) |
1865 | chan_write_failed(c); | |
e78a59f5 | 1866 | s->chanid = -1; |
1867 | } | |
1868 | ||
396c147e | 1869 | static void |
86066315 | 1870 | session_close(Session *s) |
e78a59f5 | 1871 | { |
86066315 | 1872 | debug("session_close: session %d pid %d", s->self, s->pid); |
1873 | if (s->ttyfd != -1) { | |
1874 | fatal_remove_cleanup(session_pty_cleanup, (void *)s); | |
1875 | session_pty_cleanup(s); | |
1876 | } | |
e78a59f5 | 1877 | if (s->term) |
1878 | xfree(s->term); | |
1879 | if (s->display) | |
1880 | xfree(s->display); | |
f9314d9a | 1881 | if (s->auth_display) |
1882 | xfree(s->auth_display); | |
e78a59f5 | 1883 | if (s->auth_data) |
1884 | xfree(s->auth_data); | |
1885 | if (s->auth_proto) | |
1886 | xfree(s->auth_proto); | |
1887 | s->used = 0; | |
1d1ffb87 | 1888 | session_proctitle(s); |
e78a59f5 | 1889 | } |
1890 | ||
1891 | void | |
1892 | session_close_by_pid(pid_t pid, int status) | |
1893 | { | |
1894 | Session *s = session_by_pid(pid); | |
1895 | if (s == NULL) { | |
eb26141e | 1896 | debug("session_close_by_pid: no session for pid %d", pid); |
e78a59f5 | 1897 | return; |
1898 | } | |
1899 | if (s->chanid != -1) | |
1900 | session_exit_message(s, status); | |
1901 | session_close(s); | |
1902 | } | |
1903 | ||
1904 | /* | |
1905 | * this is called when a channel dies before | |
1906 | * the session 'child' itself dies | |
1907 | */ | |
1908 | void | |
1909 | session_close_by_channel(int id, void *arg) | |
1910 | { | |
1911 | Session *s = session_by_channel(id); | |
1912 | if (s == NULL) { | |
418e724c | 1913 | debug("session_close_by_channel: no session for id %d", id); |
e78a59f5 | 1914 | return; |
1915 | } | |
418e724c | 1916 | debug("session_close_by_channel: channel %d child %d", id, s->pid); |
d5f24f94 | 1917 | if (s->pid != 0) { |
418e724c | 1918 | debug("session_close_by_channel: channel %d: has child", id); |
efcc9957 | 1919 | /* |
1920 | * delay detach of session, but release pty, since | |
1921 | * the fd's to the child are already closed | |
1922 | */ | |
1923 | if (s->ttyfd != -1) { | |
1924 | fatal_remove_cleanup(session_pty_cleanup, (void *)s); | |
1925 | session_pty_cleanup(s); | |
1926 | } | |
418e724c | 1927 | return; |
e78a59f5 | 1928 | } |
418e724c | 1929 | /* detach by removing callback */ |
1930 | channel_cancel_cleanup(s->chanid); | |
1931 | s->chanid = -1; | |
d5f24f94 | 1932 | session_close(s); |
1933 | } | |
1934 | ||
1935 | void | |
418e724c | 1936 | session_destroy_all(void) |
d5f24f94 | 1937 | { |
1938 | int i; | |
184eed6a | 1939 | for (i = 0; i < MAX_SESSIONS; i++) { |
d5f24f94 | 1940 | Session *s = &sessions[i]; |
184eed6a | 1941 | if (s->used) |
d5f24f94 | 1942 | session_close(s); |
d5f24f94 | 1943 | } |
e78a59f5 | 1944 | } |
1945 | ||
396c147e | 1946 | static char * |
1d1ffb87 | 1947 | session_tty_list(void) |
1948 | { | |
1949 | static char buf[1024]; | |
1950 | int i; | |
1951 | buf[0] = '\0'; | |
184eed6a | 1952 | for (i = 0; i < MAX_SESSIONS; i++) { |
1d1ffb87 | 1953 | Session *s = &sessions[i]; |
1954 | if (s->used && s->ttyfd != -1) { | |
1955 | if (buf[0] != '\0') | |
1956 | strlcat(buf, ",", sizeof buf); | |
1957 | strlcat(buf, strrchr(s->tty, '/') + 1, sizeof buf); | |
1958 | } | |
1959 | } | |
1960 | if (buf[0] == '\0') | |
1961 | strlcpy(buf, "notty", sizeof buf); | |
1962 | return buf; | |
1963 | } | |
1964 | ||
1965 | void | |
1966 | session_proctitle(Session *s) | |
1967 | { | |
1968 | if (s->pw == NULL) | |
1969 | error("no user for session %d", s->self); | |
1970 | else | |
1971 | setproctitle("%s@%s", s->pw->pw_name, session_tty_list()); | |
1972 | } | |
1973 | ||
8dcd9d5c | 1974 | int |
1975 | session_setup_x11fwd(Session *s) | |
1976 | { | |
8dcd9d5c | 1977 | struct stat st; |
c9d0ad9b | 1978 | char display[512], auth_display[512]; |
1979 | char hostname[MAXHOSTNAMELEN]; | |
8dcd9d5c | 1980 | |
1981 | if (no_x11_forwarding_flag) { | |
1982 | packet_send_debug("X11 forwarding disabled in user configuration file."); | |
1983 | return 0; | |
1984 | } | |
1985 | if (!options.x11_forwarding) { | |
1986 | debug("X11 forwarding disabled in server configuration file."); | |
1987 | return 0; | |
1988 | } | |
1989 | if (!options.xauth_location || | |
1990 | (stat(options.xauth_location, &st) == -1)) { | |
1991 | packet_send_debug("No xauth program; cannot forward with spoofing."); | |
1992 | return 0; | |
1993 | } | |
ff027d84 | 1994 | if (options.use_login) { |
1995 | packet_send_debug("X11 forwarding disabled; " | |
1996 | "not compatible with UseLogin=yes."); | |
1997 | return 0; | |
1998 | } | |
b44de2b1 | 1999 | if (s->display != NULL) { |
8dcd9d5c | 2000 | debug("X11 display already set."); |
2001 | return 0; | |
2002 | } | |
c9d0ad9b | 2003 | s->display_number = x11_create_display_inet(options.x11_display_offset, |
e6e573bd | 2004 | options.x11_use_localhost, s->single_connection); |
c9d0ad9b | 2005 | if (s->display_number == -1) { |
b44de2b1 | 2006 | debug("x11_create_display_inet failed."); |
8dcd9d5c | 2007 | return 0; |
2008 | } | |
c9d0ad9b | 2009 | |
2010 | /* Set up a suitable value for the DISPLAY variable. */ | |
2011 | if (gethostname(hostname, sizeof(hostname)) < 0) | |
2012 | fatal("gethostname: %.100s", strerror(errno)); | |
2013 | /* | |
2014 | * auth_display must be used as the displayname when the | |
2015 | * authorization entry is added with xauth(1). This will be | |
2016 | * different than the DISPLAY string for localhost displays. | |
2017 | */ | |
e6e573bd | 2018 | if (options.x11_use_localhost) { |
c9d0ad9b | 2019 | snprintf(display, sizeof display, "localhost:%d.%d", |
2020 | s->display_number, s->screen); | |
f9314d9a | 2021 | snprintf(auth_display, sizeof auth_display, "unix:%d.%d", |
2022 | s->display_number, s->screen); | |
c9d0ad9b | 2023 | s->display = xstrdup(display); |
f9314d9a | 2024 | s->auth_display = xstrdup(auth_display); |
c9d0ad9b | 2025 | } else { |
2026 | #ifdef IPADDR_IN_DISPLAY | |
2027 | struct hostent *he; | |
2028 | struct in_addr my_addr; | |
2029 | ||
2030 | he = gethostbyname(hostname); | |
2031 | if (he == NULL) { | |
2032 | error("Can't get IP address for X11 DISPLAY."); | |
2033 | packet_send_debug("Can't get IP address for X11 DISPLAY."); | |
2034 | return 0; | |
2035 | } | |
2036 | memcpy(&my_addr, he->h_addr_list[0], sizeof(struct in_addr)); | |
2037 | snprintf(display, sizeof display, "%.50s:%d.%d", inet_ntoa(my_addr), | |
2038 | s->display_number, s->screen); | |
2039 | #else | |
2040 | snprintf(display, sizeof display, "%.400s:%d.%d", hostname, | |
2041 | s->display_number, s->screen); | |
2042 | #endif | |
2043 | s->display = xstrdup(display); | |
f9314d9a | 2044 | s->auth_display = xstrdup(display); |
c9d0ad9b | 2045 | } |
2046 | ||
8dcd9d5c | 2047 | return 1; |
2048 | } | |
2049 | ||
396c147e | 2050 | static void |
59c97189 | 2051 | do_authenticated2(Authctxt *authctxt) |
e78a59f5 | 2052 | { |
57156994 | 2053 | server_loop2(authctxt); |
e78a59f5 | 2054 | } |