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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. |
f3c7c613 | 12 | * Copyright (c) 2000 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" | |
e697bda7 | 36 | RCSID("$OpenBSD: session.c,v 1.77 2001/05/30 12:55:13 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" | |
e697bda7 | 48 | #include "channel.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; | |
102 | struct passwd *pw; | |
103 | pid_t pid; | |
104 | /* tty */ | |
105 | char *term; | |
106 | int ptyfd, ttyfd, ptymaster; | |
107 | int row, col, xpixel, ypixel; | |
108 | char tty[TTYSZ]; | |
109 | /* X11 */ | |
110 | char *display; | |
111 | int screen; | |
112 | char *auth_proto; | |
113 | char *auth_data; | |
0b242b12 | 114 | int single_connection; |
7368a6c8 | 115 | /* proto 2 */ |
116 | int chanid; | |
e5d7a405 | 117 | int is_subsystem; |
7368a6c8 | 118 | }; |
119 | ||
120 | /* func */ | |
121 | ||
122 | Session *session_new(void); | |
123 | void session_set_fds(Session *s, int fdin, int fdout, int fderr); | |
124 | void session_pty_cleanup(Session *s); | |
1d1ffb87 | 125 | void session_proctitle(Session *s); |
65068d16 | 126 | void do_exec_pty(Session *s, const char *command); |
127 | void do_exec_no_pty(Session *s, const char *command); | |
a22aff1f | 128 | void do_login(Session *s, const char *command); |
7e2d5fa4 | 129 | #ifdef LOGIN_NEEDS_UTMPX |
130 | void do_pre_login(Session *s); | |
131 | #endif | |
56b3e9ce | 132 | void do_child(Session *s, const char *command); |
f2c2fd71 | 133 | void do_motd(void); |
134 | int check_quietlogin(Session *s, const char *command); | |
7368a6c8 | 135 | |
bb5639fe | 136 | void do_authenticated1(Authctxt *authctxt); |
137 | void do_authenticated2(Authctxt *authctxt); | |
138 | ||
7368a6c8 | 139 | /* import */ |
140 | extern ServerOptions options; | |
141 | extern char *__progname; | |
142 | extern int log_stderr; | |
143 | extern int debug_flag; | |
1e3b8b07 | 144 | extern u_int utmp_len; |
089fbbd2 | 145 | extern int startup_pipe; |
e78e738a | 146 | extern void destroy_sensitive_data(void); |
089fbbd2 | 147 | |
7368a6c8 | 148 | /* Local Xauthority file. */ |
149 | static char *xauthfile; | |
150 | ||
b5e300c2 | 151 | /* original command from peer. */ |
2b87da3b | 152 | char *original_command = NULL; |
b5e300c2 | 153 | |
7368a6c8 | 154 | /* data */ |
155 | #define MAX_SESSIONS 10 | |
156 | Session sessions[MAX_SESSIONS]; | |
c5d85828 | 157 | |
c1ef8333 | 158 | #ifdef WITH_AIXAUTHENTICATE |
159 | /* AIX's lastlogin message, set in auth1.c */ | |
160 | char *aixloginmsg; | |
161 | #endif /* WITH_AIXAUTHENTICATE */ | |
7368a6c8 | 162 | |
2e73a022 | 163 | #ifdef HAVE_LOGIN_CAP |
164 | static login_cap_t *lc; | |
165 | #endif | |
166 | ||
bb5639fe | 167 | void |
168 | do_authenticated(Authctxt *authctxt) | |
169 | { | |
170 | /* | |
171 | * Cancel the alarm we set to limit the time taken for | |
172 | * authentication. | |
173 | */ | |
174 | alarm(0); | |
175 | if (startup_pipe != -1) { | |
176 | close(startup_pipe); | |
177 | startup_pipe = -1; | |
178 | } | |
179 | #if defined(HAVE_LOGIN_CAP) && defined(HAVE_PW_CLASS_IN_PASSWD) | |
180 | if ((lc = login_getclass(authctxt->pw->pw_class)) == NULL) { | |
181 | error("unable to get login class"); | |
182 | return; | |
183 | } | |
e78e738a | 184 | #ifdef BSD_AUTH |
185 | if (auth_approval(NULL, lc, authctxt->pw->pw_name, "ssh") <= 0) { | |
186 | packet_disconnect("Approval failure for %s", | |
187 | authctxt->pw->pw_name); | |
188 | } | |
189 | #endif | |
bb5639fe | 190 | #endif |
191 | /* setup the channel layer */ | |
192 | if (!no_port_forwarding_flag && options.allow_tcp_forwarding) | |
193 | channel_permit_all_opens(); | |
194 | ||
195 | if (compat20) | |
196 | do_authenticated2(authctxt); | |
197 | else | |
198 | do_authenticated1(authctxt); | |
199 | } | |
200 | ||
7368a6c8 | 201 | /* |
202 | * Remove local Xauthority file. | |
203 | */ | |
204 | void | |
205 | xauthfile_cleanup_proc(void *ignore) | |
206 | { | |
207 | debug("xauthfile_cleanup_proc called"); | |
208 | ||
209 | if (xauthfile != NULL) { | |
210 | char *p; | |
211 | unlink(xauthfile); | |
212 | p = strrchr(xauthfile, '/'); | |
213 | if (p != NULL) { | |
214 | *p = '\0'; | |
215 | rmdir(xauthfile); | |
216 | } | |
217 | xfree(xauthfile); | |
218 | xauthfile = NULL; | |
219 | } | |
220 | } | |
221 | ||
222 | /* | |
223 | * Function to perform cleanup if we get aborted abnormally (e.g., due to a | |
224 | * dropped connection). | |
225 | */ | |
6ae2364d | 226 | void |
7368a6c8 | 227 | pty_cleanup_proc(void *session) |
228 | { | |
229 | Session *s=session; | |
230 | if (s == NULL) | |
231 | fatal("pty_cleanup_proc: no session"); | |
232 | debug("pty_cleanup_proc: %s", s->tty); | |
233 | ||
234 | if (s->pid != 0) { | |
235 | /* Record that the user has logged out. */ | |
236 | record_logout(s->pid, s->tty); | |
237 | } | |
238 | ||
239 | /* Release the pseudo-tty. */ | |
240 | pty_release(s->tty); | |
241 | } | |
242 | ||
243 | /* | |
244 | * Prepares for an interactive session. This is called after the user has | |
245 | * been successfully authenticated. During this message exchange, pseudo | |
246 | * terminals are allocated, X11, TCP/IP, and authentication agent forwardings | |
247 | * are requested, etc. | |
248 | */ | |
6ae2364d | 249 | void |
bb5639fe | 250 | do_authenticated1(Authctxt *authctxt) |
7368a6c8 | 251 | { |
252 | Session *s; | |
7368a6c8 | 253 | char *command; |
bb5639fe | 254 | int success, type, fd, n_bytes, plen, screen_flag, have_pty = 0; |
255 | int compression_level = 0, enable_compression_after_reply = 0; | |
1e3b8b07 | 256 | u_int proto_len, data_len, dlen; |
bc03d5aa | 257 | struct stat st; |
7368a6c8 | 258 | |
259 | s = session_new(); | |
bb5639fe | 260 | s->pw = authctxt->pw; |
2e73a022 | 261 | |
7368a6c8 | 262 | /* |
263 | * We stay in this loop until the client requests to execute a shell | |
264 | * or a command. | |
265 | */ | |
266 | for (;;) { | |
bb5639fe | 267 | success = 0; |
7368a6c8 | 268 | |
269 | /* Get a packet from the client. */ | |
270 | type = packet_read(&plen); | |
271 | ||
272 | /* Process the packet. */ | |
273 | switch (type) { | |
274 | case SSH_CMSG_REQUEST_COMPRESSION: | |
275 | packet_integrity_check(plen, 4, type); | |
276 | compression_level = packet_get_int(); | |
277 | if (compression_level < 1 || compression_level > 9) { | |
278 | packet_send_debug("Received illegal compression level %d.", | |
279 | compression_level); | |
280 | break; | |
281 | } | |
282 | /* Enable compression after we have responded with SUCCESS. */ | |
283 | enable_compression_after_reply = 1; | |
284 | success = 1; | |
285 | break; | |
286 | ||
287 | case SSH_CMSG_REQUEST_PTY: | |
288 | if (no_pty_flag) { | |
289 | debug("Allocating a pty not permitted for this authentication."); | |
290 | break; | |
291 | } | |
292 | if (have_pty) | |
293 | packet_disconnect("Protocol error: you already have a pty."); | |
294 | ||
295 | debug("Allocating pty."); | |
296 | ||
297 | /* Allocate a pty and open it. */ | |
298 | if (!pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, | |
299 | sizeof(s->tty))) { | |
300 | error("Failed to allocate pty."); | |
301 | break; | |
302 | } | |
303 | fatal_add_cleanup(pty_cleanup_proc, (void *)s); | |
bb5639fe | 304 | pty_setowner(s->pw, s->tty); |
7368a6c8 | 305 | |
306 | /* Get TERM from the packet. Note that the value may be of arbitrary length. */ | |
307 | s->term = packet_get_string(&dlen); | |
308 | packet_integrity_check(dlen, strlen(s->term), type); | |
309 | /* packet_integrity_check(plen, 4 + dlen + 4*4 + n_bytes, type); */ | |
310 | /* Remaining bytes */ | |
311 | n_bytes = plen - (4 + dlen + 4 * 4); | |
312 | ||
313 | if (strcmp(s->term, "") == 0) { | |
314 | xfree(s->term); | |
315 | s->term = NULL; | |
316 | } | |
317 | /* Get window size from the packet. */ | |
318 | s->row = packet_get_int(); | |
319 | s->col = packet_get_int(); | |
320 | s->xpixel = packet_get_int(); | |
321 | s->ypixel = packet_get_int(); | |
322 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); | |
323 | ||
324 | /* Get tty modes from the packet. */ | |
325 | tty_parse_modes(s->ttyfd, &n_bytes); | |
326 | packet_integrity_check(plen, 4 + dlen + 4 * 4 + n_bytes, type); | |
327 | ||
1d1ffb87 | 328 | session_proctitle(s); |
329 | ||
7368a6c8 | 330 | /* Indicate that we now have a pty. */ |
331 | success = 1; | |
332 | have_pty = 1; | |
333 | break; | |
334 | ||
335 | case SSH_CMSG_X11_REQUEST_FORWARDING: | |
336 | if (!options.x11_forwarding) { | |
337 | packet_send_debug("X11 forwarding disabled in server configuration file."); | |
338 | break; | |
339 | } | |
bc03d5aa | 340 | if (!options.xauth_location || |
341 | (stat(options.xauth_location, &st) == -1)) { | |
6fc1e9f3 | 342 | packet_send_debug("No xauth program; cannot forward with spoofing."); |
343 | break; | |
344 | } | |
7368a6c8 | 345 | if (no_x11_forwarding_flag) { |
346 | packet_send_debug("X11 forwarding not permitted for this authentication."); | |
347 | break; | |
348 | } | |
349 | debug("Received request for X11 forwarding with auth spoofing."); | |
350 | if (s->display != NULL) | |
351 | packet_disconnect("Protocol error: X11 display already set."); | |
352 | ||
353 | s->auth_proto = packet_get_string(&proto_len); | |
354 | s->auth_data = packet_get_string(&data_len); | |
7368a6c8 | 355 | |
2af09193 | 356 | screen_flag = packet_get_protocol_flags() & |
357 | SSH_PROTOFLAG_SCREEN_NUMBER; | |
358 | debug2("SSH_PROTOFLAG_SCREEN_NUMBER: %d", screen_flag); | |
359 | ||
360 | if (packet_remaining() == 4) { | |
361 | if (!screen_flag) | |
362 | debug2("Buggy client: " | |
363 | "X11 screen flag missing"); | |
c8b058b4 | 364 | packet_integrity_check(plen, |
365 | 4 + proto_len + 4 + data_len + 4, type); | |
7368a6c8 | 366 | s->screen = packet_get_int(); |
c8b058b4 | 367 | } else { |
c8b058b4 | 368 | packet_integrity_check(plen, |
369 | 4 + proto_len + 4 + data_len, type); | |
7368a6c8 | 370 | s->screen = 0; |
c8b058b4 | 371 | } |
7368a6c8 | 372 | s->display = x11_create_display_inet(s->screen, options.x11_display_offset); |
373 | ||
374 | if (s->display == NULL) | |
375 | break; | |
376 | ||
377 | /* Setup to always have a local .Xauthority. */ | |
378 | xauthfile = xmalloc(MAXPATHLEN); | |
379 | strlcpy(xauthfile, "/tmp/ssh-XXXXXXXX", MAXPATHLEN); | |
63bd8c36 | 380 | temporarily_use_uid(s->pw); |
7368a6c8 | 381 | if (mkdtemp(xauthfile) == NULL) { |
382 | restore_uid(); | |
383 | error("private X11 dir: mkdtemp %s failed: %s", | |
384 | xauthfile, strerror(errno)); | |
385 | xfree(xauthfile); | |
386 | xauthfile = NULL; | |
0b242b12 | 387 | /* XXXX remove listening channels */ |
7368a6c8 | 388 | break; |
389 | } | |
390 | strlcat(xauthfile, "/cookies", MAXPATHLEN); | |
b5e300c2 | 391 | fd = open(xauthfile, O_RDWR|O_CREAT|O_EXCL, 0600); |
392 | if (fd >= 0) | |
393 | close(fd); | |
7368a6c8 | 394 | restore_uid(); |
395 | fatal_add_cleanup(xauthfile_cleanup_proc, NULL); | |
396 | success = 1; | |
397 | break; | |
7368a6c8 | 398 | |
399 | case SSH_CMSG_AGENT_REQUEST_FORWARDING: | |
400 | if (no_agent_forwarding_flag || compat13) { | |
401 | debug("Authentication agent forwarding not permitted for this authentication."); | |
402 | break; | |
403 | } | |
404 | debug("Received authentication agent forwarding request."); | |
bb5639fe | 405 | success = auth_input_request_forwarding(s->pw); |
7368a6c8 | 406 | break; |
407 | ||
408 | case SSH_CMSG_PORT_FORWARD_REQUEST: | |
409 | if (no_port_forwarding_flag) { | |
410 | debug("Port forwarding not permitted for this authentication."); | |
411 | break; | |
412 | } | |
33de75a3 | 413 | if (!options.allow_tcp_forwarding) { |
414 | debug("Port forwarding not permitted."); | |
415 | break; | |
416 | } | |
7368a6c8 | 417 | debug("Received TCP/IP port forwarding request."); |
bb5639fe | 418 | channel_input_port_forward_request(s->pw->pw_uid == 0, options.gateway_ports); |
7368a6c8 | 419 | success = 1; |
420 | break; | |
421 | ||
422 | case SSH_CMSG_MAX_PACKET_SIZE: | |
423 | if (packet_set_maxsize(packet_get_int()) > 0) | |
424 | success = 1; | |
425 | break; | |
426 | ||
427 | case SSH_CMSG_EXEC_SHELL: | |
428 | case SSH_CMSG_EXEC_CMD: | |
7368a6c8 | 429 | if (type == SSH_CMSG_EXEC_CMD) { |
430 | command = packet_get_string(&dlen); | |
431 | debug("Exec command '%.500s'", command); | |
432 | packet_integrity_check(plen, 4 + dlen, type); | |
433 | } else { | |
434 | command = NULL; | |
435 | packet_integrity_check(plen, 0, type); | |
436 | } | |
437 | if (forced_command != NULL) { | |
b5e300c2 | 438 | original_command = command; |
7368a6c8 | 439 | command = forced_command; |
440 | debug("Forced command '%.500s'", forced_command); | |
441 | } | |
442 | if (have_pty) | |
65068d16 | 443 | do_exec_pty(s, command); |
7368a6c8 | 444 | else |
65068d16 | 445 | do_exec_no_pty(s, command); |
7368a6c8 | 446 | |
447 | if (command != NULL) | |
448 | xfree(command); | |
449 | /* Cleanup user's local Xauthority file. */ | |
450 | if (xauthfile) | |
451 | xauthfile_cleanup_proc(NULL); | |
452 | return; | |
453 | ||
454 | default: | |
455 | /* | |
456 | * Any unknown messages in this phase are ignored, | |
457 | * and a failure message is returned. | |
458 | */ | |
459 | log("Unknown packet type received after authentication: %d", type); | |
460 | } | |
461 | packet_start(success ? SSH_SMSG_SUCCESS : SSH_SMSG_FAILURE); | |
462 | packet_send(); | |
463 | packet_write_wait(); | |
464 | ||
465 | /* Enable compression now that we have replied if appropriate. */ | |
466 | if (enable_compression_after_reply) { | |
467 | enable_compression_after_reply = 0; | |
468 | packet_start_compression(compression_level); | |
469 | } | |
470 | } | |
471 | } | |
472 | ||
473 | /* | |
474 | * This is called to fork and execute a command when we have no tty. This | |
475 | * will call do_child from the child, and server_loop from the parent after | |
476 | * setting up file descriptors and such. | |
477 | */ | |
6ae2364d | 478 | void |
65068d16 | 479 | do_exec_no_pty(Session *s, const char *command) |
7368a6c8 | 480 | { |
481 | int pid; | |
482 | ||
483 | #ifdef USE_PIPES | |
484 | int pin[2], pout[2], perr[2]; | |
485 | /* Allocate pipes for communicating with the program. */ | |
486 | if (pipe(pin) < 0 || pipe(pout) < 0 || pipe(perr) < 0) | |
487 | packet_disconnect("Could not create pipes: %.100s", | |
488 | strerror(errno)); | |
489 | #else /* USE_PIPES */ | |
490 | int inout[2], err[2]; | |
491 | /* Uses socket pairs to communicate with the program. */ | |
492 | if (socketpair(AF_UNIX, SOCK_STREAM, 0, inout) < 0 || | |
493 | socketpair(AF_UNIX, SOCK_STREAM, 0, err) < 0) | |
494 | packet_disconnect("Could not create socket pairs: %.100s", | |
495 | strerror(errno)); | |
496 | #endif /* USE_PIPES */ | |
497 | if (s == NULL) | |
498 | fatal("do_exec_no_pty: no session"); | |
499 | ||
1d1ffb87 | 500 | session_proctitle(s); |
7368a6c8 | 501 | |
b19d61d7 | 502 | #if defined(USE_PAM) |
9afbfcfa | 503 | do_pam_setcred(1); |
266140a8 | 504 | #endif /* USE_PAM */ |
505 | ||
7368a6c8 | 506 | /* Fork the child. */ |
507 | if ((pid = fork()) == 0) { | |
508 | /* Child. Reinitialize the log since the pid has changed. */ | |
509 | log_init(__progname, options.log_level, options.log_facility, log_stderr); | |
510 | ||
511 | /* | |
512 | * Create a new session and process group since the 4.4BSD | |
513 | * setlogin() affects the entire process group. | |
514 | */ | |
515 | if (setsid() < 0) | |
516 | error("setsid failed: %.100s", strerror(errno)); | |
517 | ||
518 | #ifdef USE_PIPES | |
519 | /* | |
520 | * Redirect stdin. We close the parent side of the socket | |
521 | * pair, and make the child side the standard input. | |
522 | */ | |
523 | close(pin[1]); | |
524 | if (dup2(pin[0], 0) < 0) | |
525 | perror("dup2 stdin"); | |
526 | close(pin[0]); | |
527 | ||
528 | /* Redirect stdout. */ | |
529 | close(pout[0]); | |
530 | if (dup2(pout[1], 1) < 0) | |
531 | perror("dup2 stdout"); | |
532 | close(pout[1]); | |
533 | ||
534 | /* Redirect stderr. */ | |
535 | close(perr[0]); | |
536 | if (dup2(perr[1], 2) < 0) | |
537 | perror("dup2 stderr"); | |
538 | close(perr[1]); | |
539 | #else /* USE_PIPES */ | |
540 | /* | |
541 | * Redirect stdin, stdout, and stderr. Stdin and stdout will | |
542 | * use the same socket, as some programs (particularly rdist) | |
543 | * seem to depend on it. | |
544 | */ | |
545 | close(inout[1]); | |
546 | close(err[1]); | |
547 | if (dup2(inout[0], 0) < 0) /* stdin */ | |
548 | perror("dup2 stdin"); | |
549 | if (dup2(inout[0], 1) < 0) /* stdout. Note: same socket as stdin. */ | |
550 | perror("dup2 stdout"); | |
551 | if (dup2(err[0], 2) < 0) /* stderr */ | |
552 | perror("dup2 stderr"); | |
553 | #endif /* USE_PIPES */ | |
554 | ||
555 | /* Do processing for the child (exec command etc). */ | |
56b3e9ce | 556 | do_child(s, command); |
7368a6c8 | 557 | /* NOTREACHED */ |
558 | } | |
3c62e7eb | 559 | #ifdef HAVE_CYGWIN |
560 | if (is_winnt) | |
561 | cygwin_set_impersonation_token(INVALID_HANDLE_VALUE); | |
562 | #endif | |
7368a6c8 | 563 | if (pid < 0) |
564 | packet_disconnect("fork failed: %.100s", strerror(errno)); | |
565 | s->pid = pid; | |
b5c334cc | 566 | /* Set interactive/non-interactive mode. */ |
567 | packet_set_interactive(s->display != NULL); | |
7368a6c8 | 568 | #ifdef USE_PIPES |
569 | /* We are the parent. Close the child sides of the pipes. */ | |
570 | close(pin[0]); | |
571 | close(pout[1]); | |
572 | close(perr[1]); | |
573 | ||
e78a59f5 | 574 | if (compat20) { |
e5d7a405 | 575 | session_set_fds(s, pin[1], pout[0], s->is_subsystem ? -1 : perr[0]); |
e78a59f5 | 576 | } else { |
577 | /* Enter the interactive session. */ | |
578 | server_loop(pid, pin[1], pout[0], perr[0]); | |
e5d7a405 | 579 | /* server_loop has closed pin[1], pout[0], and perr[0]. */ |
e78a59f5 | 580 | } |
7368a6c8 | 581 | #else /* USE_PIPES */ |
582 | /* We are the parent. Close the child sides of the socket pairs. */ | |
583 | close(inout[0]); | |
584 | close(err[0]); | |
585 | ||
586 | /* | |
587 | * Enter the interactive session. Note: server_loop must be able to | |
588 | * handle the case that fdin and fdout are the same. | |
589 | */ | |
e78a59f5 | 590 | if (compat20) { |
e5d7a405 | 591 | session_set_fds(s, inout[1], inout[1], s->is_subsystem ? -1 : err[1]); |
e78a59f5 | 592 | } else { |
593 | server_loop(pid, inout[1], inout[1], err[1]); | |
594 | /* server_loop has closed inout[1] and err[1]. */ | |
595 | } | |
7368a6c8 | 596 | #endif /* USE_PIPES */ |
597 | } | |
598 | ||
599 | /* | |
600 | * This is called to fork and execute a command when we have a tty. This | |
601 | * will call do_child from the child, and server_loop from the parent after | |
602 | * setting up file descriptors, controlling tty, updating wtmp, utmp, | |
603 | * lastlog, and other such operations. | |
604 | */ | |
6ae2364d | 605 | void |
65068d16 | 606 | do_exec_pty(Session *s, const char *command) |
7368a6c8 | 607 | { |
7368a6c8 | 608 | int fdout, ptyfd, ttyfd, ptymaster; |
7368a6c8 | 609 | pid_t pid; |
7368a6c8 | 610 | |
611 | if (s == NULL) | |
612 | fatal("do_exec_pty: no session"); | |
613 | ptyfd = s->ptyfd; | |
614 | ttyfd = s->ttyfd; | |
615 | ||
b19d61d7 | 616 | #if defined(USE_PAM) |
bb5639fe | 617 | do_pam_session(s->pw->pw_name, s->tty); |
9afbfcfa | 618 | do_pam_setcred(1); |
27cf96de | 619 | #endif |
266140a8 | 620 | |
7368a6c8 | 621 | /* Fork the child. */ |
622 | if ((pid = fork()) == 0) { | |
c345cf9d | 623 | /* Child. Reinitialize the log because the pid has changed. */ |
7368a6c8 | 624 | log_init(__progname, options.log_level, options.log_facility, log_stderr); |
625 | ||
626 | /* Close the master side of the pseudo tty. */ | |
627 | close(ptyfd); | |
628 | ||
629 | /* Make the pseudo tty our controlling tty. */ | |
630 | pty_make_controlling_tty(&ttyfd, s->tty); | |
631 | ||
632 | /* Redirect stdin from the pseudo tty. */ | |
633 | if (dup2(ttyfd, fileno(stdin)) < 0) | |
634 | error("dup2 stdin failed: %.100s", strerror(errno)); | |
635 | ||
636 | /* Redirect stdout to the pseudo tty. */ | |
637 | if (dup2(ttyfd, fileno(stdout)) < 0) | |
638 | error("dup2 stdin failed: %.100s", strerror(errno)); | |
639 | ||
640 | /* Redirect stderr to the pseudo tty. */ | |
641 | if (dup2(ttyfd, fileno(stderr)) < 0) | |
642 | error("dup2 stdin failed: %.100s", strerror(errno)); | |
643 | ||
644 | /* Close the extra descriptor for the pseudo tty. */ | |
645 | close(ttyfd); | |
646 | ||
c345cf9d | 647 | /* record login, etc. similar to login(1) */ |
c96a4aaf | 648 | #ifndef HAVE_OSF_SIA |
a22aff1f | 649 | if (!(options.use_login && command == NULL)) |
650 | do_login(s, command); | |
7e2d5fa4 | 651 | # ifdef LOGIN_NEEDS_UTMPX |
652 | else | |
653 | do_pre_login(s); | |
654 | # endif | |
c96a4aaf | 655 | #endif |
7368a6c8 | 656 | |
7368a6c8 | 657 | /* Do common processing for the child, such as execing the command. */ |
56b3e9ce | 658 | do_child(s, command); |
7368a6c8 | 659 | /* NOTREACHED */ |
660 | } | |
3c62e7eb | 661 | #ifdef HAVE_CYGWIN |
662 | if (is_winnt) | |
663 | cygwin_set_impersonation_token(INVALID_HANDLE_VALUE); | |
664 | #endif | |
7368a6c8 | 665 | if (pid < 0) |
666 | packet_disconnect("fork failed: %.100s", strerror(errno)); | |
667 | s->pid = pid; | |
668 | ||
669 | /* Parent. Close the slave side of the pseudo tty. */ | |
670 | close(ttyfd); | |
671 | ||
672 | /* | |
673 | * Create another descriptor of the pty master side for use as the | |
674 | * standard input. We could use the original descriptor, but this | |
675 | * simplifies code in server_loop. The descriptor is bidirectional. | |
676 | */ | |
677 | fdout = dup(ptyfd); | |
678 | if (fdout < 0) | |
679 | packet_disconnect("dup #1 failed: %.100s", strerror(errno)); | |
680 | ||
681 | /* we keep a reference to the pty master */ | |
682 | ptymaster = dup(ptyfd); | |
683 | if (ptymaster < 0) | |
684 | packet_disconnect("dup #2 failed: %.100s", strerror(errno)); | |
685 | s->ptymaster = ptymaster; | |
686 | ||
687 | /* Enter interactive session. */ | |
b5c334cc | 688 | packet_set_interactive(1); |
e78a59f5 | 689 | if (compat20) { |
690 | session_set_fds(s, ptyfd, fdout, -1); | |
691 | } else { | |
692 | server_loop(pid, ptyfd, fdout, -1); | |
693 | /* server_loop _has_ closed ptyfd and fdout. */ | |
694 | session_pty_cleanup(s); | |
695 | } | |
7368a6c8 | 696 | } |
697 | ||
7e2d5fa4 | 698 | #ifdef LOGIN_NEEDS_UTMPX |
699 | void | |
700 | do_pre_login(Session *s) | |
701 | { | |
702 | socklen_t fromlen; | |
703 | struct sockaddr_storage from; | |
704 | pid_t pid = getpid(); | |
705 | ||
706 | /* | |
707 | * Get IP address of client. If the connection is not a socket, let | |
708 | * the address be 0.0.0.0. | |
709 | */ | |
710 | memset(&from, 0, sizeof(from)); | |
711 | if (packet_connection_is_on_socket()) { | |
712 | fromlen = sizeof(from); | |
713 | if (getpeername(packet_get_connection_in(), | |
714 | (struct sockaddr *) & from, &fromlen) < 0) { | |
715 | debug("getpeername: %.100s", strerror(errno)); | |
716 | fatal_cleanup(); | |
717 | } | |
718 | } | |
719 | ||
720 | record_utmp_only(pid, s->tty, s->pw->pw_name, | |
721 | get_remote_name_or_ip(utmp_len, options.reverse_mapping_check), | |
722 | (struct sockaddr *)&from); | |
723 | } | |
724 | #endif | |
725 | ||
c345cf9d | 726 | /* administrative, login(1)-like work */ |
727 | void | |
a22aff1f | 728 | do_login(Session *s, const char *command) |
c345cf9d | 729 | { |
c345cf9d | 730 | char *time_string; |
b5e300c2 | 731 | char hostname[MAXHOSTNAMELEN]; |
c345cf9d | 732 | socklen_t fromlen; |
733 | struct sockaddr_storage from; | |
c345cf9d | 734 | time_t last_login_time; |
735 | struct passwd * pw = s->pw; | |
736 | pid_t pid = getpid(); | |
737 | ||
738 | /* | |
739 | * Get IP address of client. If the connection is not a socket, let | |
740 | * the address be 0.0.0.0. | |
741 | */ | |
742 | memset(&from, 0, sizeof(from)); | |
743 | if (packet_connection_is_on_socket()) { | |
744 | fromlen = sizeof(from); | |
745 | if (getpeername(packet_get_connection_in(), | |
746 | (struct sockaddr *) & from, &fromlen) < 0) { | |
747 | debug("getpeername: %.100s", strerror(errno)); | |
748 | fatal_cleanup(); | |
749 | } | |
750 | } | |
751 | ||
bcbf86ec | 752 | /* Get the time and hostname when the user last logged in. */ |
4f4648f9 | 753 | if (options.print_lastlog) { |
754 | hostname[0] = '\0'; | |
755 | last_login_time = get_last_login_time(pw->pw_uid, pw->pw_name, | |
756 | hostname, sizeof(hostname)); | |
757 | } | |
bcbf86ec | 758 | |
c345cf9d | 759 | /* Record that there was a login on that tty from the remote host. */ |
760 | record_login(pid, s->tty, pw->pw_name, pw->pw_uid, | |
46e3af7f | 761 | get_remote_name_or_ip(utmp_len, options.reverse_mapping_check), |
762 | (struct sockaddr *)&from); | |
c345cf9d | 763 | |
2919e060 | 764 | #ifdef USE_PAM |
765 | /* | |
766 | * If password change is needed, do it now. | |
767 | * This needs to occur before the ~/.hushlogin check. | |
768 | */ | |
e11aab29 | 769 | if (is_pam_password_change_required()) { |
2919e060 | 770 | print_pam_messages(); |
771 | do_pam_chauthtok(); | |
772 | } | |
773 | #endif | |
774 | ||
f2c2fd71 | 775 | if (check_quietlogin(s, command)) |
c345cf9d | 776 | return; |
777 | ||
778 | #ifdef USE_PAM | |
e11aab29 | 779 | if (!is_pam_password_change_required()) |
2919e060 | 780 | print_pam_messages(); |
c345cf9d | 781 | #endif /* USE_PAM */ |
782 | #ifdef WITH_AIXAUTHENTICATE | |
783 | if (aixloginmsg && *aixloginmsg) | |
784 | printf("%s\n", aixloginmsg); | |
785 | #endif /* WITH_AIXAUTHENTICATE */ | |
786 | ||
4f4648f9 | 787 | if (options.print_lastlog && last_login_time != 0) { |
c345cf9d | 788 | time_string = ctime(&last_login_time); |
789 | if (strchr(time_string, '\n')) | |
790 | *strchr(time_string, '\n') = 0; | |
f478712e | 791 | if (strcmp(hostname, "") == 0) |
c345cf9d | 792 | printf("Last login: %s\r\n", time_string); |
793 | else | |
bcbf86ec | 794 | printf("Last login: %s from %s\r\n", time_string, hostname); |
c345cf9d | 795 | } |
f2c2fd71 | 796 | |
797 | do_motd(); | |
798 | } | |
799 | ||
800 | /* | |
801 | * Display the message of the day. | |
802 | */ | |
803 | void | |
804 | do_motd(void) | |
805 | { | |
806 | FILE *f; | |
807 | char buf[256]; | |
808 | ||
c345cf9d | 809 | if (options.print_motd) { |
2e73a022 | 810 | #ifdef HAVE_LOGIN_CAP |
811 | f = fopen(login_getcapstr(lc, "welcome", "/etc/motd", | |
812 | "/etc/motd"), "r"); | |
813 | #else | |
c345cf9d | 814 | f = fopen("/etc/motd", "r"); |
2e73a022 | 815 | #endif |
c345cf9d | 816 | if (f) { |
817 | while (fgets(buf, sizeof(buf), f)) | |
818 | fputs(buf, stdout); | |
819 | fclose(f); | |
820 | } | |
821 | } | |
822 | } | |
823 | ||
f2c2fd71 | 824 | |
825 | /* | |
826 | * Check for quiet login, either .hushlogin or command given. | |
827 | */ | |
828 | int | |
829 | check_quietlogin(Session *s, const char *command) | |
830 | { | |
831 | char buf[256]; | |
832 | struct passwd * pw = s->pw; | |
833 | struct stat st; | |
834 | ||
835 | /* Return 1 if .hushlogin exists or a command given. */ | |
836 | if (command != NULL) | |
837 | return 1; | |
838 | snprintf(buf, sizeof(buf), "%.200s/.hushlogin", pw->pw_dir); | |
839 | #ifdef HAVE_LOGIN_CAP | |
840 | if (login_getcapbool(lc, "hushlogin", 0) || stat(buf, &st) >= 0) | |
841 | return 1; | |
842 | #else | |
843 | if (stat(buf, &st) >= 0) | |
844 | return 1; | |
845 | #endif | |
846 | return 0; | |
847 | } | |
848 | ||
7368a6c8 | 849 | /* |
850 | * Sets the value of the given variable in the environment. If the variable | |
851 | * already exists, its value is overriden. | |
852 | */ | |
6ae2364d | 853 | void |
1e3b8b07 | 854 | child_set_env(char ***envp, u_int *envsizep, const char *name, |
7368a6c8 | 855 | const char *value) |
856 | { | |
1e3b8b07 | 857 | u_int i, namelen; |
7368a6c8 | 858 | char **env; |
859 | ||
860 | /* | |
861 | * Find the slot where the value should be stored. If the variable | |
862 | * already exists, we reuse the slot; otherwise we append a new slot | |
863 | * at the end of the array, expanding if necessary. | |
864 | */ | |
865 | env = *envp; | |
866 | namelen = strlen(name); | |
867 | for (i = 0; env[i]; i++) | |
868 | if (strncmp(env[i], name, namelen) == 0 && env[i][namelen] == '=') | |
869 | break; | |
870 | if (env[i]) { | |
871 | /* Reuse the slot. */ | |
872 | xfree(env[i]); | |
873 | } else { | |
874 | /* New variable. Expand if necessary. */ | |
875 | if (i >= (*envsizep) - 1) { | |
876 | (*envsizep) += 50; | |
877 | env = (*envp) = xrealloc(env, (*envsizep) * sizeof(char *)); | |
878 | } | |
879 | /* Need to set the NULL pointer at end of array beyond the new slot. */ | |
880 | env[i + 1] = NULL; | |
881 | } | |
882 | ||
883 | /* Allocate space and format the variable in the appropriate slot. */ | |
884 | env[i] = xmalloc(strlen(name) + 1 + strlen(value) + 1); | |
885 | snprintf(env[i], strlen(name) + 1 + strlen(value) + 1, "%s=%s", name, value); | |
886 | } | |
887 | ||
888 | /* | |
889 | * Reads environment variables from the given file and adds/overrides them | |
890 | * into the environment. If the file does not exist, this does nothing. | |
891 | * Otherwise, it must consist of empty lines, comments (line starts with '#') | |
892 | * and assignments of the form name=value. No other forms are allowed. | |
893 | */ | |
6ae2364d | 894 | void |
1e3b8b07 | 895 | read_environment_file(char ***env, u_int *envsize, |
7368a6c8 | 896 | const char *filename) |
897 | { | |
898 | FILE *f; | |
899 | char buf[4096]; | |
900 | char *cp, *value; | |
901 | ||
902 | f = fopen(filename, "r"); | |
903 | if (!f) | |
904 | return; | |
905 | ||
906 | while (fgets(buf, sizeof(buf), f)) { | |
907 | for (cp = buf; *cp == ' ' || *cp == '\t'; cp++) | |
908 | ; | |
909 | if (!*cp || *cp == '#' || *cp == '\n') | |
910 | continue; | |
911 | if (strchr(cp, '\n')) | |
912 | *strchr(cp, '\n') = '\0'; | |
913 | value = strchr(cp, '='); | |
914 | if (value == NULL) { | |
915 | fprintf(stderr, "Bad line in %.100s: %.200s\n", filename, buf); | |
916 | continue; | |
917 | } | |
71276795 | 918 | /* |
919 | * Replace the equals sign by nul, and advance value to | |
920 | * the value string. | |
921 | */ | |
7368a6c8 | 922 | *value = '\0'; |
923 | value++; | |
924 | child_set_env(env, envsize, cp, value); | |
925 | } | |
926 | fclose(f); | |
927 | } | |
928 | ||
929 | #ifdef USE_PAM | |
930 | /* | |
931 | * Sets any environment variables which have been specified by PAM | |
932 | */ | |
933 | void do_pam_environment(char ***env, int *envsize) | |
934 | { | |
935 | char *equals, var_name[512], var_val[512]; | |
936 | char **pam_env; | |
937 | int i; | |
938 | ||
939 | if ((pam_env = fetch_pam_environment()) == NULL) | |
940 | return; | |
2b87da3b | 941 | |
7368a6c8 | 942 | for(i = 0; pam_env[i] != NULL; i++) { |
943 | if ((equals = strstr(pam_env[i], "=")) == NULL) | |
944 | continue; | |
2b87da3b | 945 | |
7368a6c8 | 946 | if (strlen(pam_env[i]) < (sizeof(var_name) - 1)) { |
947 | memset(var_name, '\0', sizeof(var_name)); | |
948 | memset(var_val, '\0', sizeof(var_val)); | |
949 | ||
950 | strncpy(var_name, pam_env[i], equals - pam_env[i]); | |
951 | strcpy(var_val, equals + 1); | |
952 | ||
22d89d24 | 953 | debug3("PAM environment: %s=%s", var_name, var_val); |
7368a6c8 | 954 | |
955 | child_set_env(env, envsize, var_name, var_val); | |
956 | } | |
957 | } | |
958 | } | |
959 | #endif /* USE_PAM */ | |
960 | ||
22d89d24 | 961 | #ifdef HAVE_CYGWIN |
962 | void copy_environment(char ***env, int *envsize) | |
963 | { | |
964 | char *equals, var_name[512], var_val[512]; | |
965 | int i; | |
966 | ||
967 | for(i = 0; environ[i] != NULL; i++) { | |
968 | if ((equals = strstr(environ[i], "=")) == NULL) | |
969 | continue; | |
2b87da3b | 970 | |
22d89d24 | 971 | if (strlen(environ[i]) < (sizeof(var_name) - 1)) { |
972 | memset(var_name, '\0', sizeof(var_name)); | |
973 | memset(var_val, '\0', sizeof(var_val)); | |
974 | ||
975 | strncpy(var_name, environ[i], equals - environ[i]); | |
976 | strcpy(var_val, equals + 1); | |
977 | ||
978 | debug3("Copy environment: %s=%s", var_name, var_val); | |
979 | ||
980 | child_set_env(env, envsize, var_name, var_val); | |
981 | } | |
982 | } | |
983 | } | |
984 | #endif | |
985 | ||
5fa45897 | 986 | #if defined(HAVE_GETUSERATTR) |
987 | /* | |
988 | * AIX-specific login initialisation | |
989 | */ | |
990 | void set_limit(char *user, char *soft, char *hard, int resource, int mult) | |
991 | { | |
992 | struct rlimit rlim; | |
56118702 | 993 | int slim, hlim; |
5fa45897 | 994 | |
995 | getrlimit(resource, &rlim); | |
996 | ||
56118702 | 997 | slim = 0; |
998 | if (getuserattr(user, soft, &slim, SEC_INT) != -1) { | |
999 | if (slim < 0) { | |
1000 | rlim.rlim_cur = RLIM_INFINITY; | |
1001 | } else if (slim != 0) { | |
1002 | /* See the wackiness below */ | |
1003 | if (rlim.rlim_cur == slim * mult) | |
1004 | slim = 0; | |
1005 | else | |
1006 | rlim.rlim_cur = slim * mult; | |
1007 | } | |
1008 | } | |
5fa45897 | 1009 | |
56118702 | 1010 | hlim = 0; |
1011 | if (getuserattr(user, hard, &hlim, SEC_INT) != -1) { | |
1012 | if (hlim < 0) { | |
1013 | rlim.rlim_max = RLIM_INFINITY; | |
1014 | } else if (hlim != 0) { | |
1015 | rlim.rlim_max = hlim * mult; | |
1016 | } | |
1017 | } | |
5fa45897 | 1018 | |
56118702 | 1019 | /* |
1020 | * XXX For cpu and fsize the soft limit is set to the hard limit | |
1021 | * if the hard limit is left at its default value and the soft limit | |
1022 | * is changed from its default value, either by requesting it | |
1023 | * (slim == 0) or by setting it to the current default. At least | |
1024 | * that's how rlogind does it. If you're confused you're not alone. | |
1025 | * Bug or feature? AIX 4.3.1.2 | |
1026 | */ | |
1027 | if ((!strcmp(soft, "fsize") || !strcmp(soft, "cpu")) | |
1028 | && hlim == 0 && slim != 0) | |
1029 | rlim.rlim_max = rlim.rlim_cur; | |
1030 | /* A specified hard limit limits the soft limit */ | |
1031 | else if (hlim > 0 && rlim.rlim_cur > rlim.rlim_max) | |
1032 | rlim.rlim_cur = rlim.rlim_max; | |
1033 | /* A soft limit can increase a hard limit */ | |
1034 | else if (rlim.rlim_cur > rlim.rlim_max) | |
5fa45897 | 1035 | rlim.rlim_max = rlim.rlim_cur; |
1036 | ||
1037 | if (setrlimit(resource, &rlim) != 0) | |
56118702 | 1038 | error("setrlimit(%.10s) failed: %.100s", soft, strerror(errno)); |
5fa45897 | 1039 | } |
1040 | ||
1041 | void set_limits_from_userattr(char *user) | |
1042 | { | |
1043 | int mask; | |
1044 | char buf[16]; | |
1045 | ||
1046 | set_limit(user, S_UFSIZE, S_UFSIZE_HARD, RLIMIT_FSIZE, 512); | |
1047 | set_limit(user, S_UCPU, S_UCPU_HARD, RLIMIT_CPU, 1); | |
1048 | set_limit(user, S_UDATA, S_UDATA_HARD, RLIMIT_DATA, 512); | |
1049 | set_limit(user, S_USTACK, S_USTACK_HARD, RLIMIT_STACK, 512); | |
1050 | set_limit(user, S_URSS, S_URSS_HARD, RLIMIT_RSS, 512); | |
1051 | set_limit(user, S_UCORE, S_UCORE_HARD, RLIMIT_CORE, 512); | |
1052 | #if defined(S_UNOFILE) | |
1053 | set_limit(user, S_UNOFILE, S_UNOFILE_HARD, RLIMIT_NOFILE, 1); | |
1054 | #endif | |
1055 | ||
1056 | if (getuserattr(user, S_UMASK, &mask, SEC_INT) != -1) { | |
1057 | /* Convert decimal to octal */ | |
1058 | (void) snprintf(buf, sizeof(buf), "%d", mask); | |
1059 | if (sscanf(buf, "%o", &mask) == 1) | |
1060 | umask(mask); | |
1061 | } | |
1062 | } | |
1063 | #endif /* defined(HAVE_GETUSERATTR) */ | |
1064 | ||
7368a6c8 | 1065 | /* |
1066 | * Performs common processing for the child, such as setting up the | |
1067 | * environment, closing extra file descriptors, setting the user and group | |
1068 | * ids, and executing the command or shell. | |
1069 | */ | |
6ae2364d | 1070 | void |
56b3e9ce | 1071 | do_child(Session *s, const char *command) |
7368a6c8 | 1072 | { |
b5e300c2 | 1073 | const char *shell, *hostname = NULL, *cp = NULL; |
56b3e9ce | 1074 | struct passwd * pw = s->pw; |
7368a6c8 | 1075 | char buf[256]; |
6fc1e9f3 | 1076 | char cmd[1024]; |
2e73a022 | 1077 | FILE *f = NULL; |
1e3b8b07 | 1078 | u_int envsize, i; |
7368a6c8 | 1079 | char **env; |
1080 | extern char **environ; | |
1081 | struct stat st; | |
1082 | char *argv[10]; | |
56b3e9ce | 1083 | int do_xauth = s->auth_proto != NULL && s->auth_data != NULL; |
3206bb3b | 1084 | #ifdef WITH_IRIX_PROJECT |
1085 | prid_t projid; | |
1086 | #endif /* WITH_IRIX_PROJECT */ | |
d287c664 | 1087 | #ifdef WITH_IRIX_JOBS |
1088 | jid_t jid = 0; | |
1089 | #else | |
1090 | #ifdef WITH_IRIX_ARRAY | |
1091 | int jid = 0; | |
1092 | #endif /* WITH_IRIX_ARRAY */ | |
1093 | #endif /* WITH_IRIX_JOBS */ | |
1094 | ||
e78e738a | 1095 | /* remove hostkey from the child's memory */ |
1096 | destroy_sensitive_data(); | |
1097 | ||
fa649821 | 1098 | /* login(1) is only called if we execute the login shell */ |
1099 | if (options.use_login && command != NULL) | |
1100 | options.use_login = 0; | |
1101 | ||
c96a4aaf | 1102 | #if !defined(USE_PAM) && !defined(HAVE_OSF_SIA) |
2e73a022 | 1103 | if (!options.use_login) { |
1104 | # ifdef HAVE_LOGIN_CAP | |
1105 | if (!login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid) | |
1106 | f = fopen(login_getcapstr(lc, "nologin", _PATH_NOLOGIN, | |
1107 | _PATH_NOLOGIN), "r"); | |
1108 | # else /* HAVE_LOGIN_CAP */ | |
1109 | if (pw->pw_uid) | |
1110 | f = fopen(_PATH_NOLOGIN, "r"); | |
1111 | # endif /* HAVE_LOGIN_CAP */ | |
1112 | if (f) { | |
1113 | /* /etc/nologin exists. Print its contents and exit. */ | |
1114 | while (fgets(buf, sizeof(buf), f)) | |
1115 | fputs(buf, stderr); | |
1116 | fclose(f); | |
7368a6c8 | 1117 | exit(254); |
2e73a022 | 1118 | } |
7368a6c8 | 1119 | } |
c96a4aaf | 1120 | #endif /* USE_PAM || HAVE_OSF_SIA */ |
7368a6c8 | 1121 | |
2e73a022 | 1122 | /* Set login name, uid, gid, and groups. */ |
7368a6c8 | 1123 | /* Login(1) does this as well, and it needs uid 0 for the "-h" |
1124 | switch, so we let login(1) to this for us. */ | |
1125 | if (!options.use_login) { | |
4d33e531 | 1126 | #ifdef HAVE_OSF_SIA |
7a7101ec | 1127 | session_setup_sia(pw->pw_name, s->ttyfd == -1 ? NULL : s->tty); |
c96a4aaf | 1128 | if (!check_quietlogin(s, command)) |
1129 | do_motd(); | |
815800e1 | 1130 | #else /* HAVE_OSF_SIA */ |
3c62e7eb | 1131 | #ifdef HAVE_CYGWIN |
1132 | if (is_winnt) { | |
1133 | #else | |
7368a6c8 | 1134 | if (getuid() == 0 || geteuid() == 0) { |
3c62e7eb | 1135 | #endif |
2e73a022 | 1136 | # ifdef HAVE_GETUSERATTR |
5fa45897 | 1137 | set_limits_from_userattr(pw->pw_name); |
2e73a022 | 1138 | # endif /* HAVE_GETUSERATTR */ |
1139 | # ifdef HAVE_LOGIN_CAP | |
1140 | if (setusercontext(lc, pw, pw->pw_uid, | |
1141 | (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) { | |
1142 | perror("unable to set user context"); | |
1143 | exit(1); | |
1144 | } | |
1145 | # else /* HAVE_LOGIN_CAP */ | |
73d6d7fa | 1146 | #if defined(HAVE_GETLUID) && defined(HAVE_SETLUID) |
1147 | /* Sets login uid for accounting */ | |
1148 | if (getluid() == -1 && setluid(pw->pw_uid) == -1) | |
1149 | error("setluid: %s", strerror(errno)); | |
1150 | #endif /* defined(HAVE_GETLUID) && defined(HAVE_SETLUID) */ | |
1151 | ||
2e73a022 | 1152 | if (setlogin(pw->pw_name) < 0) |
1153 | error("setlogin failed: %s", strerror(errno)); | |
7368a6c8 | 1154 | if (setgid(pw->pw_gid) < 0) { |
1155 | perror("setgid"); | |
1156 | exit(1); | |
1157 | } | |
1158 | /* Initialize the group list. */ | |
1159 | if (initgroups(pw->pw_name, pw->pw_gid) < 0) { | |
1160 | perror("initgroups"); | |
1161 | exit(1); | |
1162 | } | |
1163 | endgrent(); | |
9afbfcfa | 1164 | # ifdef USE_PAM |
1165 | /* | |
1166 | * PAM credentials may take the form of | |
1167 | * supplementary groups. These will have been | |
1168 | * wiped by the above initgroups() call. | |
1169 | * Reestablish them here. | |
1170 | */ | |
1171 | do_pam_setcred(0); | |
1172 | # endif /* USE_PAM */ | |
d287c664 | 1173 | # ifdef WITH_IRIX_JOBS |
1174 | jid = jlimit_startjob(pw->pw_name, pw->pw_uid, "interactive"); | |
1175 | if (jid == -1) { | |
1176 | fatal("Failed to create job container: %.100s", | |
1177 | strerror(errno)); | |
2b87da3b | 1178 | } |
d287c664 | 1179 | # endif /* WITH_IRIX_JOBS */ |
2e73a022 | 1180 | # ifdef WITH_IRIX_ARRAY |
3206bb3b | 1181 | /* initialize array session */ |
d287c664 | 1182 | if (jid == 0) { |
1183 | if (newarraysess() != 0) | |
1184 | fatal("Failed to set up new array session: %.100s", | |
1185 | strerror(errno)); | |
1186 | } | |
2e73a022 | 1187 | # endif /* WITH_IRIX_ARRAY */ |
1188 | # ifdef WITH_IRIX_PROJECT | |
3206bb3b | 1189 | /* initialize irix project info */ |
1190 | if ((projid = getdfltprojuser(pw->pw_name)) == -1) { | |
1191 | debug("Failed to get project id, using projid 0"); | |
1192 | projid = 0; | |
1193 | } | |
3206bb3b | 1194 | if (setprid(projid)) |
1195 | fatal("Failed to initialize project %d for %s: %.100s", | |
1196 | (int)projid, pw->pw_name, strerror(errno)); | |
2e73a022 | 1197 | # endif /* WITH_IRIX_PROJECT */ |
260d427b | 1198 | #ifdef WITH_IRIX_AUDIT |
1199 | if (sysconf(_SC_AUDIT)) { | |
1200 | debug("Setting sat id to %d", (int) pw->pw_uid); | |
1201 | if (satsetid(pw->pw_uid)) | |
1202 | debug("error setting satid: %.100s", strerror(errno)); | |
1203 | } | |
1204 | #endif /* WITH_IRIX_AUDIT */ | |
1205 | ||
8a968c25 | 1206 | #ifdef _AIX |
1207 | /* | |
1208 | * AIX has a "usrinfo" area where logname and | |
1209 | * other stuff is stored - a few applications | |
1210 | * actually use this and die if it's not set | |
1211 | */ | |
ee110bfb | 1212 | if (s->ttyfd == -1) |
1213 | s->tty[0] = '\0'; | |
f5f6020e | 1214 | cp = xmalloc(22 + strlen(s->tty) + |
8a968c25 | 1215 | 2 * strlen(pw->pw_name)); |
1216 | i = sprintf(cp, "LOGNAME=%s%cNAME=%s%cTTY=%s%c%c", | |
ee110bfb | 1217 | pw->pw_name, 0, pw->pw_name, 0, s->tty, 0, 0); |
8a968c25 | 1218 | if (usrinfo(SETUINFO, cp, i) == -1) |
1219 | fatal("Couldn't set usrinfo: %s", | |
1220 | strerror(errno)); | |
1221 | debug3("AIX/UsrInfo: set len %d", i); | |
1222 | xfree(cp); | |
1223 | #endif | |
1224 | ||
7368a6c8 | 1225 | /* Permanently switch to the desired uid. */ |
63bd8c36 | 1226 | permanently_set_uid(pw); |
2e73a022 | 1227 | # endif /* HAVE_LOGIN_CAP */ |
7368a6c8 | 1228 | } |
2e73a022 | 1229 | #endif /* HAVE_OSF_SIA */ |
1230 | ||
3c62e7eb | 1231 | #ifdef HAVE_CYGWIN |
1232 | if (is_winnt) | |
1233 | #endif | |
7368a6c8 | 1234 | if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid) |
14a9a859 | 1235 | fatal("Failed to set uids to %u.", (u_int) pw->pw_uid); |
7368a6c8 | 1236 | } |
1237 | /* | |
1238 | * Get the shell from the password data. An empty shell field is | |
1239 | * legal, and means /bin/sh. | |
1240 | */ | |
1241 | shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell; | |
2e73a022 | 1242 | #ifdef HAVE_LOGIN_CAP |
1243 | shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell); | |
1244 | #endif | |
7368a6c8 | 1245 | |
1246 | #ifdef AFS | |
1247 | /* Try to get AFS tokens for the local cell. */ | |
1248 | if (k_hasafs()) { | |
1249 | char cell[64]; | |
1250 | ||
1251 | if (k_afs_cell_of_file(pw->pw_dir, cell, sizeof(cell)) == 0) | |
1252 | krb_afslog(cell, 0); | |
1253 | ||
1254 | krb_afslog(0, 0); | |
1255 | } | |
1256 | #endif /* AFS */ | |
1257 | ||
1258 | /* Initialize the environment. */ | |
1259 | envsize = 100; | |
1260 | env = xmalloc(envsize * sizeof(char *)); | |
1261 | env[0] = NULL; | |
1262 | ||
3c62e7eb | 1263 | #ifdef HAVE_CYGWIN |
1264 | /* | |
1265 | * The Windows environment contains some setting which are | |
1266 | * important for a running system. They must not be dropped. | |
1267 | */ | |
22d89d24 | 1268 | copy_environment(&env, &envsize); |
3c62e7eb | 1269 | #endif |
1270 | ||
7368a6c8 | 1271 | if (!options.use_login) { |
1272 | /* Set basic environment. */ | |
1273 | child_set_env(&env, &envsize, "USER", pw->pw_name); | |
1274 | child_set_env(&env, &envsize, "LOGNAME", pw->pw_name); | |
1275 | child_set_env(&env, &envsize, "HOME", pw->pw_dir); | |
2e73a022 | 1276 | #ifdef HAVE_LOGIN_CAP |
1277 | (void) setusercontext(lc, pw, pw->pw_uid, LOGIN_SETPATH); | |
1278 | child_set_env(&env, &envsize, "PATH", getenv("PATH")); | |
22d89d24 | 1279 | #else /* HAVE_LOGIN_CAP */ |
1280 | # ifndef HAVE_CYGWIN | |
3c62e7eb | 1281 | /* |
1282 | * There's no standard path on Windows. The path contains | |
1283 | * important components pointing to the system directories, | |
1284 | * needed for loading shared libraries. So the path better | |
1285 | * remains intact here. | |
1286 | */ | |
7368a6c8 | 1287 | child_set_env(&env, &envsize, "PATH", _PATH_STDPATH); |
22d89d24 | 1288 | # endif /* HAVE_CYGWIN */ |
1289 | #endif /* HAVE_LOGIN_CAP */ | |
7368a6c8 | 1290 | |
1291 | snprintf(buf, sizeof buf, "%.200s/%.50s", | |
1292 | _PATH_MAILDIR, pw->pw_name); | |
1293 | child_set_env(&env, &envsize, "MAIL", buf); | |
1294 | ||
1295 | /* Normal systems set SHELL by default. */ | |
1296 | child_set_env(&env, &envsize, "SHELL", shell); | |
1297 | } | |
1298 | if (getenv("TZ")) | |
1299 | child_set_env(&env, &envsize, "TZ", getenv("TZ")); | |
1300 | ||
1301 | /* Set custom environment options from RSA authentication. */ | |
1302 | while (custom_environment) { | |
1303 | struct envstring *ce = custom_environment; | |
1304 | char *s = ce->s; | |
1305 | int i; | |
1306 | for (i = 0; s[i] != '=' && s[i]; i++); | |
1307 | if (s[i] == '=') { | |
1308 | s[i] = 0; | |
1309 | child_set_env(&env, &envsize, s, s + i + 1); | |
1310 | } | |
1311 | custom_environment = ce->next; | |
1312 | xfree(ce->s); | |
1313 | xfree(ce); | |
1314 | } | |
1315 | ||
1316 | snprintf(buf, sizeof buf, "%.50s %d %d", | |
1317 | get_remote_ipaddr(), get_remote_port(), get_local_port()); | |
1318 | child_set_env(&env, &envsize, "SSH_CLIENT", buf); | |
1319 | ||
56b3e9ce | 1320 | if (s->ttyfd != -1) |
1321 | child_set_env(&env, &envsize, "SSH_TTY", s->tty); | |
1322 | if (s->term) | |
1323 | child_set_env(&env, &envsize, "TERM", s->term); | |
1324 | if (s->display) | |
1325 | child_set_env(&env, &envsize, "DISPLAY", s->display); | |
b5e300c2 | 1326 | if (original_command) |
1327 | child_set_env(&env, &envsize, "SSH_ORIGINAL_COMMAND", | |
1328 | original_command); | |
7368a6c8 | 1329 | |
1330 | #ifdef _AIX | |
22d89d24 | 1331 | if ((cp = getenv("AUTHSTATE")) != NULL) |
1332 | child_set_env(&env, &envsize, "AUTHSTATE", cp); | |
1333 | if ((cp = getenv("KRB5CCNAME")) != NULL) | |
1334 | child_set_env(&env, &envsize, "KRB5CCNAME", cp); | |
1335 | read_environment_file(&env, &envsize, "/etc/environment"); | |
7368a6c8 | 1336 | #endif |
1337 | ||
1338 | #ifdef KRB4 | |
1339 | { | |
1340 | extern char *ticket; | |
1341 | ||
1342 | if (ticket) | |
1343 | child_set_env(&env, &envsize, "KRBTKFILE", ticket); | |
1344 | } | |
1345 | #endif /* KRB4 */ | |
1346 | ||
1347 | #ifdef USE_PAM | |
1348 | /* Pull in any environment variables that may have been set by PAM. */ | |
1349 | do_pam_environment(&env, &envsize); | |
1350 | #endif /* USE_PAM */ | |
1351 | ||
7368a6c8 | 1352 | if (xauthfile) |
1353 | child_set_env(&env, &envsize, "XAUTHORITY", xauthfile); | |
1354 | if (auth_get_socket_name() != NULL) | |
1355 | child_set_env(&env, &envsize, SSH_AUTHSOCKET_ENV_NAME, | |
1356 | auth_get_socket_name()); | |
1357 | ||
1358 | /* read $HOME/.ssh/environment. */ | |
1359 | if (!options.use_login) { | |
71276795 | 1360 | snprintf(buf, sizeof buf, "%.200s/.ssh/environment", |
1361 | pw->pw_dir); | |
7368a6c8 | 1362 | read_environment_file(&env, &envsize, buf); |
1363 | } | |
1364 | if (debug_flag) { | |
1365 | /* dump the environment */ | |
1366 | fprintf(stderr, "Environment:\n"); | |
1367 | for (i = 0; env[i]; i++) | |
1368 | fprintf(stderr, " %.200s\n", env[i]); | |
1369 | } | |
2e73a022 | 1370 | /* we have to stash the hostname before we close our socket. */ |
1371 | if (options.use_login) | |
46e3af7f | 1372 | hostname = get_remote_name_or_ip(utmp_len, |
1373 | options.reverse_mapping_check); | |
7368a6c8 | 1374 | /* |
1375 | * Close the connection descriptors; note that this is the child, and | |
1376 | * the server will still have the socket open, and it is important | |
1377 | * that we do not shutdown it. Note that the descriptors cannot be | |
1378 | * closed before building the environment, as we call | |
1379 | * get_remote_ipaddr there. | |
1380 | */ | |
1381 | if (packet_get_connection_in() == packet_get_connection_out()) | |
1382 | close(packet_get_connection_in()); | |
1383 | else { | |
1384 | close(packet_get_connection_in()); | |
1385 | close(packet_get_connection_out()); | |
1386 | } | |
1387 | /* | |
1388 | * Close all descriptors related to channels. They will still remain | |
1389 | * open in the parent. | |
1390 | */ | |
1391 | /* XXX better use close-on-exec? -markus */ | |
1392 | channel_close_all(); | |
1393 | ||
1394 | /* | |
1395 | * Close any extra file descriptors. Note that there may still be | |
1396 | * descriptors left by system functions. They will be closed later. | |
1397 | */ | |
1398 | endpwent(); | |
1399 | ||
1400 | /* | |
1401 | * Close any extra open file descriptors so that we don\'t have them | |
1402 | * hanging around in clients. Note that we want to do this after | |
1403 | * initgroups, because at least on Solaris 2.3 it leaves file | |
1404 | * descriptors open. | |
1405 | */ | |
1406 | for (i = 3; i < 64; i++) | |
1407 | close(i); | |
1408 | ||
1409 | /* Change current directory to the user\'s home directory. */ | |
2e73a022 | 1410 | if (chdir(pw->pw_dir) < 0) { |
7368a6c8 | 1411 | fprintf(stderr, "Could not chdir to home directory %s: %s\n", |
1412 | pw->pw_dir, strerror(errno)); | |
2e73a022 | 1413 | #ifdef HAVE_LOGIN_CAP |
1414 | if (login_getcapbool(lc, "requirehome", 0)) | |
1415 | exit(1); | |
1416 | #endif | |
1417 | } | |
7368a6c8 | 1418 | |
1419 | /* | |
1420 | * Must take new environment into use so that .ssh/rc, /etc/sshrc and | |
1421 | * xauth are run in the proper environment. | |
1422 | */ | |
1423 | environ = env; | |
1424 | ||
1425 | /* | |
1426 | * Run $HOME/.ssh/rc, /etc/sshrc, or xauth (whichever is found first | |
1427 | * in this order). | |
1428 | */ | |
1429 | if (!options.use_login) { | |
e78e738a | 1430 | /* ignore _PATH_SSH_USER_RC for subsystems */ |
1431 | if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) { | |
503e7e5b | 1432 | snprintf(cmd, sizeof cmd, "%s -c '%s %s'", |
1433 | shell, _PATH_BSHELL, _PATH_SSH_USER_RC); | |
7368a6c8 | 1434 | if (debug_flag) |
503e7e5b | 1435 | fprintf(stderr, "Running %s\n", cmd); |
1436 | f = popen(cmd, "w"); | |
7368a6c8 | 1437 | if (f) { |
56b3e9ce | 1438 | if (do_xauth) |
1439 | fprintf(f, "%s %s\n", s->auth_proto, | |
1440 | s->auth_data); | |
7368a6c8 | 1441 | pclose(f); |
1442 | } else | |
96c63318 | 1443 | fprintf(stderr, "Could not run %s\n", |
56b3e9ce | 1444 | _PATH_SSH_USER_RC); |
42f11eb2 | 1445 | } else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) { |
7368a6c8 | 1446 | if (debug_flag) |
56b3e9ce | 1447 | fprintf(stderr, "Running %s %s\n", _PATH_BSHELL, |
1448 | _PATH_SSH_SYSTEM_RC); | |
42f11eb2 | 1449 | f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w"); |
7368a6c8 | 1450 | if (f) { |
56b3e9ce | 1451 | if (do_xauth) |
1452 | fprintf(f, "%s %s\n", s->auth_proto, | |
1453 | s->auth_data); | |
7368a6c8 | 1454 | pclose(f); |
1455 | } else | |
56b3e9ce | 1456 | fprintf(stderr, "Could not run %s\n", |
1457 | _PATH_SSH_SYSTEM_RC); | |
1458 | } else if (do_xauth && options.xauth_location != NULL) { | |
7368a6c8 | 1459 | /* Add authority data to .Xauthority if appropriate. */ |
56b3e9ce | 1460 | char *screen = strchr(s->display, ':'); |
1461 | ||
1462 | if (debug_flag) { | |
1463 | fprintf(stderr, | |
1464 | "Running %.100s add " | |
1465 | "%.100s %.100s %.100s\n", | |
1466 | options.xauth_location, s->display, | |
1467 | s->auth_proto, s->auth_data); | |
1468 | if (screen != NULL) | |
71276795 | 1469 | fprintf(stderr, |
56b3e9ce | 1470 | "Adding %.*s/unix%s %s %s\n", |
1471 | (int)(screen - s->display), | |
1472 | s->display, screen, | |
1473 | s->auth_proto, s->auth_data); | |
1474 | } | |
1475 | snprintf(cmd, sizeof cmd, "%s -q -", | |
1476 | options.xauth_location); | |
1477 | f = popen(cmd, "w"); | |
1478 | if (f) { | |
1479 | fprintf(f, "add %s %s %s\n", s->display, | |
1480 | s->auth_proto, s->auth_data); | |
1481 | if (screen != NULL) | |
1482 | fprintf(f, "add %.*s/unix%s %s %s\n", | |
1483 | (int)(screen - s->display), | |
1484 | s->display, screen, | |
1485 | s->auth_proto, | |
1486 | s->auth_data); | |
1487 | pclose(f); | |
1488 | } else { | |
1489 | fprintf(stderr, "Could not run %s\n", | |
1490 | cmd); | |
7368a6c8 | 1491 | } |
1492 | } | |
7368a6c8 | 1493 | /* Get the last component of the shell name. */ |
1494 | cp = strrchr(shell, '/'); | |
1495 | if (cp) | |
1496 | cp++; | |
1497 | else | |
1498 | cp = shell; | |
1499 | } | |
1d3c30db | 1500 | |
1501 | /* restore SIGPIPE for child */ | |
1502 | signal(SIGPIPE, SIG_DFL); | |
1503 | ||
7368a6c8 | 1504 | /* |
1505 | * If we have no command, execute the shell. In this case, the shell | |
1506 | * name to be passed in argv[0] is preceded by '-' to indicate that | |
1507 | * this is a login shell. | |
1508 | */ | |
1509 | if (!command) { | |
1510 | if (!options.use_login) { | |
1511 | char buf[256]; | |
1512 | ||
1513 | /* | |
1514 | * Check for mail if we have a tty and it was enabled | |
1515 | * in server options. | |
1516 | */ | |
56b3e9ce | 1517 | if (s->ttyfd != -1 && options.check_mail) { |
7368a6c8 | 1518 | char *mailbox; |
1519 | struct stat mailstat; | |
56b3e9ce | 1520 | |
7368a6c8 | 1521 | mailbox = getenv("MAIL"); |
1522 | if (mailbox != NULL) { | |
71276795 | 1523 | if (stat(mailbox, &mailstat) != 0 || |
1524 | mailstat.st_size == 0) | |
7368a6c8 | 1525 | printf("No mail.\n"); |
1526 | else if (mailstat.st_mtime < mailstat.st_atime) | |
1527 | printf("You have mail.\n"); | |
1528 | else | |
1529 | printf("You have new mail.\n"); | |
1530 | } | |
1531 | } | |
1532 | /* Start the shell. Set initial character to '-'. */ | |
1533 | buf[0] = '-'; | |
1534 | strncpy(buf + 1, cp, sizeof(buf) - 1); | |
1535 | buf[sizeof(buf) - 1] = 0; | |
1536 | ||
1537 | /* Execute the shell. */ | |
1538 | argv[0] = buf; | |
1539 | argv[1] = NULL; | |
1540 | execve(shell, argv, env); | |
1541 | ||
1542 | /* Executing the shell failed. */ | |
1543 | perror(shell); | |
1544 | exit(1); | |
1545 | ||
1546 | } else { | |
1547 | /* Launch login(1). */ | |
1548 | ||
2e73a022 | 1549 | execl(LOGIN_PROGRAM, "login", "-h", hostname, |
7e2d5fa4 | 1550 | #ifdef LOGIN_NEEDS_TERM |
1551 | s->term? s->term : "unknown", | |
1552 | #endif | |
c345cf9d | 1553 | "-p", "-f", "--", pw->pw_name, NULL); |
7368a6c8 | 1554 | |
1555 | /* Login couldn't be executed, die. */ | |
1556 | ||
1557 | perror("login"); | |
1558 | exit(1); | |
1559 | } | |
1560 | } | |
1561 | /* | |
1562 | * Execute the command using the user's shell. This uses the -c | |
1563 | * option to execute the command. | |
1564 | */ | |
1565 | argv[0] = (char *) cp; | |
1566 | argv[1] = "-c"; | |
1567 | argv[2] = (char *) command; | |
1568 | argv[3] = NULL; | |
1569 | execve(shell, argv, env); | |
1570 | perror(shell); | |
1571 | exit(1); | |
1572 | } | |
1573 | ||
1574 | Session * | |
1575 | session_new(void) | |
1576 | { | |
1577 | int i; | |
1578 | static int did_init = 0; | |
1579 | if (!did_init) { | |
1580 | debug("session_new: init"); | |
1581 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1582 | sessions[i].used = 0; | |
1583 | sessions[i].self = i; | |
1584 | } | |
1585 | did_init = 1; | |
1586 | } | |
1587 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1588 | Session *s = &sessions[i]; | |
1589 | if (! s->used) { | |
690d0d7f | 1590 | memset(s, 0, sizeof(*s)); |
7368a6c8 | 1591 | s->chanid = -1; |
1592 | s->ptyfd = -1; | |
1593 | s->ttyfd = -1; | |
7368a6c8 | 1594 | s->used = 1; |
02323c45 | 1595 | debug("session_new: session %d", i); |
7368a6c8 | 1596 | return s; |
1597 | } | |
1598 | } | |
1599 | return NULL; | |
1600 | } | |
1601 | ||
1602 | void | |
1603 | session_dump(void) | |
1604 | { | |
1605 | int i; | |
1606 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1607 | Session *s = &sessions[i]; | |
1608 | debug("dump: used %d session %d %p channel %d pid %d", | |
1609 | s->used, | |
1610 | s->self, | |
1611 | s, | |
1612 | s->chanid, | |
1613 | s->pid); | |
1614 | } | |
1615 | } | |
1616 | ||
e78a59f5 | 1617 | int |
1618 | session_open(int chanid) | |
1619 | { | |
1620 | Session *s = session_new(); | |
1621 | debug("session_open: channel %d", chanid); | |
1622 | if (s == NULL) { | |
1623 | error("no more sessions"); | |
1624 | return 0; | |
1625 | } | |
e78a59f5 | 1626 | s->pw = auth_get_user(); |
1627 | if (s->pw == NULL) | |
0725ea77 | 1628 | fatal("no user for session %d", s->self); |
0b242b12 | 1629 | debug("session_open: session %d: link with channel %d", s->self, chanid); |
1630 | s->chanid = chanid; | |
e78a59f5 | 1631 | return 1; |
1632 | } | |
1633 | ||
1634 | Session * | |
1635 | session_by_channel(int id) | |
1636 | { | |
1637 | int i; | |
1638 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1639 | Session *s = &sessions[i]; | |
1640 | if (s->used && s->chanid == id) { | |
1641 | debug("session_by_channel: session %d channel %d", i, id); | |
1642 | return s; | |
1643 | } | |
1644 | } | |
1645 | debug("session_by_channel: unknown channel %d", id); | |
1646 | session_dump(); | |
1647 | return NULL; | |
1648 | } | |
1649 | ||
1650 | Session * | |
1651 | session_by_pid(pid_t pid) | |
1652 | { | |
1653 | int i; | |
1654 | debug("session_by_pid: pid %d", pid); | |
1655 | for(i = 0; i < MAX_SESSIONS; i++) { | |
1656 | Session *s = &sessions[i]; | |
1657 | if (s->used && s->pid == pid) | |
1658 | return s; | |
1659 | } | |
1660 | error("session_by_pid: unknown pid %d", pid); | |
1661 | session_dump(); | |
1662 | return NULL; | |
1663 | } | |
1664 | ||
1665 | int | |
1666 | session_window_change_req(Session *s) | |
1667 | { | |
1668 | s->col = packet_get_int(); | |
1669 | s->row = packet_get_int(); | |
1670 | s->xpixel = packet_get_int(); | |
1671 | s->ypixel = packet_get_int(); | |
6ae2364d | 1672 | packet_done(); |
e78a59f5 | 1673 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); |
1674 | return 1; | |
1675 | } | |
1676 | ||
1677 | int | |
1678 | session_pty_req(Session *s) | |
1679 | { | |
1e3b8b07 | 1680 | u_int len; |
30dcc918 | 1681 | int n_bytes; |
e78a59f5 | 1682 | |
38c295d6 | 1683 | if (no_pty_flag) |
1684 | return 0; | |
e78a59f5 | 1685 | if (s->ttyfd != -1) |
6ae2364d | 1686 | return 0; |
e78a59f5 | 1687 | s->term = packet_get_string(&len); |
1688 | s->col = packet_get_int(); | |
1689 | s->row = packet_get_int(); | |
1690 | s->xpixel = packet_get_int(); | |
1691 | s->ypixel = packet_get_int(); | |
1692 | ||
1693 | if (strcmp(s->term, "") == 0) { | |
1694 | xfree(s->term); | |
1695 | s->term = NULL; | |
1696 | } | |
1697 | /* Allocate a pty and open it. */ | |
1698 | if (!pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty))) { | |
1699 | xfree(s->term); | |
1700 | s->term = NULL; | |
1701 | s->ptyfd = -1; | |
1702 | s->ttyfd = -1; | |
1703 | error("session_pty_req: session %d alloc failed", s->self); | |
6ae2364d | 1704 | return 0; |
e78a59f5 | 1705 | } |
1706 | debug("session_pty_req: session %d alloc %s", s->self, s->tty); | |
1707 | /* | |
1708 | * Add a cleanup function to clear the utmp entry and record logout | |
1709 | * time in case we call fatal() (e.g., the connection gets closed). | |
1710 | */ | |
1711 | fatal_add_cleanup(pty_cleanup_proc, (void *)s); | |
1712 | pty_setowner(s->pw, s->tty); | |
1713 | /* Get window size from the packet. */ | |
1714 | pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); | |
1715 | ||
30dcc918 | 1716 | /* Get tty modes from the packet. */ |
1717 | tty_parse_modes(s->ttyfd, &n_bytes); | |
1718 | packet_done(); | |
1719 | ||
1d1ffb87 | 1720 | session_proctitle(s); |
1721 | ||
e78a59f5 | 1722 | return 1; |
1723 | } | |
1724 | ||
0b242b12 | 1725 | int |
1726 | session_subsystem_req(Session *s) | |
1727 | { | |
1e3b8b07 | 1728 | u_int len; |
0b242b12 | 1729 | int success = 0; |
1730 | char *subsys = packet_get_string(&len); | |
38c295d6 | 1731 | int i; |
0b242b12 | 1732 | |
1733 | packet_done(); | |
1734 | log("subsystem request for %s", subsys); | |
1735 | ||
38c295d6 | 1736 | for (i = 0; i < options.num_subsystems; i++) { |
1737 | if(strcmp(subsys, options.subsystem_name[i]) == 0) { | |
1738 | debug("subsystem: exec() %s", options.subsystem_command[i]); | |
e5d7a405 | 1739 | s->is_subsystem = 1; |
65068d16 | 1740 | do_exec_no_pty(s, options.subsystem_command[i]); |
38c295d6 | 1741 | success = 1; |
1742 | } | |
1743 | } | |
1744 | ||
1745 | if (!success) | |
1746 | log("subsystem request for %s failed, subsystem not found", subsys); | |
1747 | ||
0b242b12 | 1748 | xfree(subsys); |
1749 | return success; | |
1750 | } | |
1751 | ||
1752 | int | |
1753 | session_x11_req(Session *s) | |
1754 | { | |
b5e300c2 | 1755 | int fd; |
bc03d5aa | 1756 | struct stat st; |
089fbbd2 | 1757 | if (no_x11_forwarding_flag) { |
38c295d6 | 1758 | debug("X11 forwarding disabled in user configuration file."); |
1759 | return 0; | |
1760 | } | |
0b242b12 | 1761 | if (!options.x11_forwarding) { |
1762 | debug("X11 forwarding disabled in server configuration file."); | |
1763 | return 0; | |
1764 | } | |
bc03d5aa | 1765 | if (!options.xauth_location || |
1766 | (stat(options.xauth_location, &st) == -1)) { | |
1767 | packet_send_debug("No xauth program; cannot forward with spoofing."); | |
1768 | return 0; | |
1769 | } | |
0b242b12 | 1770 | if (xauthfile != NULL) { |
1771 | debug("X11 fwd already started."); | |
1772 | return 0; | |
1773 | } | |
1774 | ||
1775 | debug("Received request for X11 forwarding with auth spoofing."); | |
1776 | if (s->display != NULL) | |
1777 | packet_disconnect("Protocol error: X11 display already set."); | |
1778 | ||
1779 | s->single_connection = packet_get_char(); | |
1780 | s->auth_proto = packet_get_string(NULL); | |
1781 | s->auth_data = packet_get_string(NULL); | |
1782 | s->screen = packet_get_int(); | |
1783 | packet_done(); | |
1784 | ||
1785 | s->display = x11_create_display_inet(s->screen, options.x11_display_offset); | |
1786 | if (s->display == NULL) { | |
1787 | xfree(s->auth_proto); | |
1788 | xfree(s->auth_data); | |
1789 | return 0; | |
1790 | } | |
1791 | xauthfile = xmalloc(MAXPATHLEN); | |
1792 | strlcpy(xauthfile, "/tmp/ssh-XXXXXXXX", MAXPATHLEN); | |
63bd8c36 | 1793 | temporarily_use_uid(s->pw); |
0b242b12 | 1794 | if (mkdtemp(xauthfile) == NULL) { |
1795 | restore_uid(); | |
1796 | error("private X11 dir: mkdtemp %s failed: %s", | |
1797 | xauthfile, strerror(errno)); | |
1798 | xfree(xauthfile); | |
1799 | xauthfile = NULL; | |
1800 | xfree(s->auth_proto); | |
1801 | xfree(s->auth_data); | |
1802 | /* XXXX remove listening channels */ | |
1803 | return 0; | |
1804 | } | |
1805 | strlcat(xauthfile, "/cookies", MAXPATHLEN); | |
b5e300c2 | 1806 | fd = open(xauthfile, O_RDWR|O_CREAT|O_EXCL, 0600); |
1807 | if (fd >= 0) | |
1808 | close(fd); | |
0b242b12 | 1809 | restore_uid(); |
1810 | fatal_add_cleanup(xauthfile_cleanup_proc, s); | |
1811 | return 1; | |
1812 | } | |
1813 | ||
38c295d6 | 1814 | int |
1815 | session_shell_req(Session *s) | |
1816 | { | |
1817 | /* if forced_command == NULL, the shell is execed */ | |
1818 | char *shell = forced_command; | |
1819 | packet_done(); | |
38c295d6 | 1820 | if (s->ttyfd == -1) |
65068d16 | 1821 | do_exec_no_pty(s, shell); |
38c295d6 | 1822 | else |
65068d16 | 1823 | do_exec_pty(s, shell); |
38c295d6 | 1824 | return 1; |
1825 | } | |
1826 | ||
1827 | int | |
1828 | session_exec_req(Session *s) | |
1829 | { | |
1e3b8b07 | 1830 | u_int len; |
38c295d6 | 1831 | char *command = packet_get_string(&len); |
1832 | packet_done(); | |
1833 | if (forced_command) { | |
b5e300c2 | 1834 | original_command = command; |
38c295d6 | 1835 | command = forced_command; |
1836 | debug("Forced command '%.500s'", forced_command); | |
1837 | } | |
38c295d6 | 1838 | if (s->ttyfd == -1) |
65068d16 | 1839 | do_exec_no_pty(s, command); |
38c295d6 | 1840 | else |
65068d16 | 1841 | do_exec_pty(s, command); |
38c295d6 | 1842 | if (forced_command == NULL) |
1843 | xfree(command); | |
1844 | return 1; | |
1845 | } | |
1846 | ||
fa08c86b | 1847 | int |
1848 | session_auth_agent_req(Session *s) | |
1849 | { | |
1850 | static int called = 0; | |
1851 | packet_done(); | |
d343d900 | 1852 | if (no_agent_forwarding_flag) { |
1853 | debug("session_auth_agent_req: no_agent_forwarding_flag"); | |
1854 | return 0; | |
1855 | } | |
fa08c86b | 1856 | if (called) { |
1857 | return 0; | |
1858 | } else { | |
1859 | called = 1; | |
1860 | return auth_input_request_forwarding(s->pw); | |
1861 | } | |
1862 | } | |
1863 | ||
e78a59f5 | 1864 | void |
1865 | session_input_channel_req(int id, void *arg) | |
1866 | { | |
1e3b8b07 | 1867 | u_int len; |
e78a59f5 | 1868 | int reply; |
1869 | int success = 0; | |
1870 | char *rtype; | |
1871 | Session *s; | |
1872 | Channel *c; | |
1873 | ||
1874 | rtype = packet_get_string(&len); | |
1875 | reply = packet_get_char(); | |
1876 | ||
1877 | s = session_by_channel(id); | |
1878 | if (s == NULL) | |
1879 | fatal("session_input_channel_req: channel %d: no session", id); | |
1880 | c = channel_lookup(id); | |
1881 | if (c == NULL) | |
1882 | fatal("session_input_channel_req: channel %d: bad channel", id); | |
1883 | ||
1884 | debug("session_input_channel_req: session %d channel %d request %s reply %d", | |
1885 | s->self, id, rtype, reply); | |
1886 | ||
1887 | /* | |
e5d7a405 | 1888 | * a session is in LARVAL state until a shell, a command |
1889 | * or a subsystem is executed | |
e78a59f5 | 1890 | */ |
1891 | if (c->type == SSH_CHANNEL_LARVAL) { | |
1892 | if (strcmp(rtype, "shell") == 0) { | |
38c295d6 | 1893 | success = session_shell_req(s); |
e78a59f5 | 1894 | } else if (strcmp(rtype, "exec") == 0) { |
38c295d6 | 1895 | success = session_exec_req(s); |
e78a59f5 | 1896 | } else if (strcmp(rtype, "pty-req") == 0) { |
35484284 | 1897 | success = session_pty_req(s); |
0b242b12 | 1898 | } else if (strcmp(rtype, "x11-req") == 0) { |
1899 | success = session_x11_req(s); | |
fa08c86b | 1900 | } else if (strcmp(rtype, "auth-agent-req@openssh.com") == 0) { |
1901 | success = session_auth_agent_req(s); | |
0b242b12 | 1902 | } else if (strcmp(rtype, "subsystem") == 0) { |
1903 | success = session_subsystem_req(s); | |
e78a59f5 | 1904 | } |
1905 | } | |
1906 | if (strcmp(rtype, "window-change") == 0) { | |
1907 | success = session_window_change_req(s); | |
1908 | } | |
1909 | ||
1910 | if (reply) { | |
1911 | packet_start(success ? | |
1912 | SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE); | |
1913 | packet_put_int(c->remote_id); | |
1914 | packet_send(); | |
1915 | } | |
1916 | xfree(rtype); | |
1917 | } | |
1918 | ||
1919 | void | |
1920 | session_set_fds(Session *s, int fdin, int fdout, int fderr) | |
1921 | { | |
1922 | if (!compat20) | |
1923 | fatal("session_set_fds: called for proto != 2.0"); | |
1924 | /* | |
1925 | * now that have a child and a pipe to the child, | |
1926 | * we can activate our channel and register the fd's | |
1927 | */ | |
1928 | if (s->chanid == -1) | |
1929 | fatal("no channel for session %d", s->self); | |
1930 | channel_set_fds(s->chanid, | |
1931 | fdout, fdin, fderr, | |
a22aff1f | 1932 | fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ, |
1933 | 1); | |
e78a59f5 | 1934 | } |
1935 | ||
7368a6c8 | 1936 | void |
1937 | session_pty_cleanup(Session *s) | |
1938 | { | |
1939 | if (s == NULL || s->ttyfd == -1) | |
1940 | return; | |
1941 | ||
0725ea77 | 1942 | debug("session_pty_cleanup: session %d release %s", s->self, s->tty); |
7368a6c8 | 1943 | |
1944 | /* Cancel the cleanup function. */ | |
1945 | fatal_remove_cleanup(pty_cleanup_proc, (void *)s); | |
1946 | ||
1947 | /* Record that the user has logged out. */ | |
1948 | record_logout(s->pid, s->tty); | |
1949 | ||
1950 | /* Release the pseudo-tty. */ | |
1951 | pty_release(s->tty); | |
1952 | ||
1953 | /* | |
1954 | * Close the server side of the socket pairs. We must do this after | |
1955 | * the pty cleanup, so that another process doesn't get this pty | |
1956 | * while we're still cleaning up. | |
1957 | */ | |
1958 | if (close(s->ptymaster) < 0) | |
1959 | error("close(s->ptymaster): %s", strerror(errno)); | |
1960 | } | |
e78a59f5 | 1961 | |
1962 | void | |
1963 | session_exit_message(Session *s, int status) | |
1964 | { | |
1965 | Channel *c; | |
1966 | if (s == NULL) | |
1967 | fatal("session_close: no session"); | |
1968 | c = channel_lookup(s->chanid); | |
1969 | if (c == NULL) | |
1970 | fatal("session_close: session %d: no channel %d", | |
1971 | s->self, s->chanid); | |
1972 | debug("session_exit_message: session %d channel %d pid %d", | |
1973 | s->self, s->chanid, s->pid); | |
1974 | ||
1975 | if (WIFEXITED(status)) { | |
1976 | channel_request_start(s->chanid, | |
1977 | "exit-status", 0); | |
1978 | packet_put_int(WEXITSTATUS(status)); | |
1979 | packet_send(); | |
1980 | } else if (WIFSIGNALED(status)) { | |
1981 | channel_request_start(s->chanid, | |
1982 | "exit-signal", 0); | |
1983 | packet_put_int(WTERMSIG(status)); | |
a64009ad | 1984 | #ifdef WCOREDUMP |
e78a59f5 | 1985 | packet_put_char(WCOREDUMP(status)); |
a64009ad | 1986 | #else /* WCOREDUMP */ |
1987 | packet_put_char(0); | |
1988 | #endif /* WCOREDUMP */ | |
e78a59f5 | 1989 | packet_put_cstring(""); |
1990 | packet_put_cstring(""); | |
1991 | packet_send(); | |
1992 | } else { | |
1993 | /* Some weird exit cause. Just exit. */ | |
1994 | packet_disconnect("wait returned status %04x.", status); | |
1995 | } | |
1996 | ||
1997 | /* disconnect channel */ | |
1998 | debug("session_exit_message: release channel %d", s->chanid); | |
1999 | channel_cancel_cleanup(s->chanid); | |
9da5c3c9 | 2000 | /* |
2001 | * emulate a write failure with 'chan_write_failed', nobody will be | |
2002 | * interested in data we write. | |
2003 | * Note that we must not call 'chan_read_failed', since there could | |
2004 | * be some more data waiting in the pipe. | |
2005 | */ | |
0b242b12 | 2006 | if (c->ostate != CHAN_OUTPUT_CLOSED) |
2007 | chan_write_failed(c); | |
e78a59f5 | 2008 | s->chanid = -1; |
2009 | } | |
2010 | ||
2011 | void | |
2012 | session_free(Session *s) | |
2013 | { | |
2014 | debug("session_free: session %d pid %d", s->self, s->pid); | |
2015 | if (s->term) | |
2016 | xfree(s->term); | |
2017 | if (s->display) | |
2018 | xfree(s->display); | |
2019 | if (s->auth_data) | |
2020 | xfree(s->auth_data); | |
2021 | if (s->auth_proto) | |
2022 | xfree(s->auth_proto); | |
2023 | s->used = 0; | |
2024 | } | |
2025 | ||
2026 | void | |
2027 | session_close(Session *s) | |
2028 | { | |
2029 | session_pty_cleanup(s); | |
2030 | session_free(s); | |
1d1ffb87 | 2031 | session_proctitle(s); |
e78a59f5 | 2032 | } |
2033 | ||
2034 | void | |
2035 | session_close_by_pid(pid_t pid, int status) | |
2036 | { | |
2037 | Session *s = session_by_pid(pid); | |
2038 | if (s == NULL) { | |
2039 | debug("session_close_by_pid: no session for pid %d", s->pid); | |
2040 | return; | |
2041 | } | |
2042 | if (s->chanid != -1) | |
2043 | session_exit_message(s, status); | |
2044 | session_close(s); | |
2045 | } | |
2046 | ||
2047 | /* | |
2048 | * this is called when a channel dies before | |
2049 | * the session 'child' itself dies | |
2050 | */ | |
2051 | void | |
2052 | session_close_by_channel(int id, void *arg) | |
2053 | { | |
2054 | Session *s = session_by_channel(id); | |
2055 | if (s == NULL) { | |
2056 | debug("session_close_by_channel: no session for channel %d", id); | |
2057 | return; | |
2058 | } | |
2059 | /* disconnect channel */ | |
2060 | channel_cancel_cleanup(s->chanid); | |
2061 | s->chanid = -1; | |
2062 | ||
2063 | debug("session_close_by_channel: channel %d kill %d", id, s->pid); | |
2064 | if (s->pid == 0) { | |
2065 | /* close session immediately */ | |
2066 | session_close(s); | |
2067 | } else { | |
2068 | /* notify child, delay session cleanup */ | |
512ad3c0 | 2069 | if (kill(s->pid, (s->ttyfd == -1) ? SIGTERM : SIGHUP) < 0) |
e78a59f5 | 2070 | error("session_close_by_channel: kill %d: %s", |
2071 | s->pid, strerror(errno)); | |
2072 | } | |
2073 | } | |
2074 | ||
1d1ffb87 | 2075 | char * |
2076 | session_tty_list(void) | |
2077 | { | |
2078 | static char buf[1024]; | |
2079 | int i; | |
2080 | buf[0] = '\0'; | |
2081 | for(i = 0; i < MAX_SESSIONS; i++) { | |
2082 | Session *s = &sessions[i]; | |
2083 | if (s->used && s->ttyfd != -1) { | |
2084 | if (buf[0] != '\0') | |
2085 | strlcat(buf, ",", sizeof buf); | |
2086 | strlcat(buf, strrchr(s->tty, '/') + 1, sizeof buf); | |
2087 | } | |
2088 | } | |
2089 | if (buf[0] == '\0') | |
2090 | strlcpy(buf, "notty", sizeof buf); | |
2091 | return buf; | |
2092 | } | |
2093 | ||
2094 | void | |
2095 | session_proctitle(Session *s) | |
2096 | { | |
2097 | if (s->pw == NULL) | |
2098 | error("no user for session %d", s->self); | |
2099 | else | |
2100 | setproctitle("%s@%s", s->pw->pw_name, session_tty_list()); | |
2101 | } | |
2102 | ||
e78a59f5 | 2103 | void |
59c97189 | 2104 | do_authenticated2(Authctxt *authctxt) |
e78a59f5 | 2105 | { |
bb5639fe | 2106 | |
e78a59f5 | 2107 | server_loop2(); |
34bce9a5 | 2108 | if (xauthfile) |
2109 | xauthfile_cleanup_proc(NULL); | |
e78a59f5 | 2110 | } |