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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
8c6db833 LP |
2 | |
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
8c6db833 LP |
11 | (at your option) any later version. |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 16 | Lesser General Public License for more details. |
8c6db833 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
8c6db833 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <errno.h> | |
23 | #include <fcntl.h> | |
24 | #include <sys/file.h> | |
25 | #include <pwd.h> | |
a838e6a1 | 26 | #include <endian.h> |
ac123445 | 27 | #include <sys/capability.h> |
8c6db833 LP |
28 | |
29 | #include <security/pam_modules.h> | |
30 | #include <security/_pam_macros.h> | |
31 | #include <security/pam_modutil.h> | |
32 | #include <security/pam_ext.h> | |
33 | #include <security/pam_misc.h> | |
34 | ||
8c6db833 | 35 | #include "util.h" |
d7832d2c | 36 | #include "audit.h" |
8c6db833 | 37 | #include "macro.h" |
74fe1fe3 | 38 | #include "strv.h" |
ffcfcb6b | 39 | #include "bus-util.h" |
98a28fef | 40 | #include "def.h" |
4d6d6518 | 41 | #include "socket-util.h" |
a5c32cff | 42 | #include "fileio.h" |
8c6db833 LP |
43 | |
44 | static int parse_argv(pam_handle_t *handle, | |
45 | int argc, const char **argv, | |
485507b8 | 46 | const char **class, |
0e318cad | 47 | bool *debug) { |
8c6db833 LP |
48 | |
49 | unsigned i; | |
50 | ||
51 | assert(argc >= 0); | |
52 | assert(argc == 0 || argv); | |
53 | ||
05a049cc | 54 | for (i = 0; i < (unsigned) argc; i++) |
fb6becb4 | 55 | if (startswith(argv[i], "class=")) { |
485507b8 MM |
56 | if (class) |
57 | *class = argv[i] + 6; | |
58 | ||
05a049cc ZJS |
59 | } else if (streq(argv[i], "debug")) { |
60 | if (debug) | |
61 | *debug = true; | |
fb6becb4 | 62 | |
05a049cc ZJS |
63 | } else if (startswith(argv[i], "debug=")) { |
64 | int k; | |
0e318cad | 65 | |
05a049cc ZJS |
66 | k = parse_boolean(argv[i] + 6); |
67 | if (k < 0) | |
68 | pam_syslog(handle, LOG_WARNING, "Failed to parse debug= argument, ignoring."); | |
69 | else if (debug) | |
0e318cad MS |
70 | *debug = k; |
71 | ||
05a049cc | 72 | } else |
fb6becb4 | 73 | pam_syslog(handle, LOG_WARNING, "Unknown parameter '%s', ignoring", argv[i]); |
8c6db833 | 74 | |
8c6db833 LP |
75 | return 0; |
76 | } | |
77 | ||
8c6db833 LP |
78 | static int get_user_data( |
79 | pam_handle_t *handle, | |
80 | const char **ret_username, | |
81 | struct passwd **ret_pw) { | |
82 | ||
d90b9d27 LP |
83 | const char *username = NULL; |
84 | struct passwd *pw = NULL; | |
87d2c1ff | 85 | uid_t uid; |
8c6db833 LP |
86 | int r; |
87 | ||
88 | assert(handle); | |
89 | assert(ret_username); | |
90 | assert(ret_pw); | |
91 | ||
87d2c1ff LP |
92 | r = audit_loginuid_from_pid(0, &uid); |
93 | if (r >= 0) | |
94 | pw = pam_modutil_getpwuid(handle, uid); | |
95 | else { | |
96 | r = pam_get_user(handle, &username, NULL); | |
97 | if (r != PAM_SUCCESS) { | |
d90b9d27 LP |
98 | pam_syslog(handle, LOG_ERR, "Failed to get user name."); |
99 | return r; | |
100 | } | |
101 | ||
87d2c1ff | 102 | if (isempty(username)) { |
d90b9d27 LP |
103 | pam_syslog(handle, LOG_ERR, "User name not valid."); |
104 | return PAM_AUTH_ERR; | |
105 | } | |
106 | ||
107 | pw = pam_modutil_getpwnam(handle, username); | |
8c6db833 LP |
108 | } |
109 | ||
d90b9d27 | 110 | if (!pw) { |
8c6db833 LP |
111 | pam_syslog(handle, LOG_ERR, "Failed to get user data."); |
112 | return PAM_USER_UNKNOWN; | |
113 | } | |
114 | ||
115 | *ret_pw = pw; | |
d90b9d27 | 116 | *ret_username = username ? username : pw->pw_name; |
8c6db833 LP |
117 | |
118 | return PAM_SUCCESS; | |
119 | } | |
120 | ||
4d6d6518 | 121 | static int get_seat_from_display(const char *display, const char **seat, uint32_t *vtnr) { |
7fd1b19b | 122 | _cleanup_free_ char *p = NULL; |
4d6d6518 | 123 | int r; |
7fd1b19b | 124 | _cleanup_close_ int fd = -1; |
b92bea5d ZJS |
125 | union sockaddr_union sa = { |
126 | .un.sun_family = AF_UNIX, | |
127 | }; | |
4d6d6518 LP |
128 | struct ucred ucred; |
129 | socklen_t l; | |
7fd1b19b | 130 | _cleanup_free_ char *tty = NULL; |
4d6d6518 LP |
131 | int v; |
132 | ||
133 | assert(display); | |
4d6d6518 LP |
134 | assert(vtnr); |
135 | ||
136 | /* We deduce the X11 socket from the display name, then use | |
137 | * SO_PEERCRED to determine the X11 server process, ask for | |
138 | * the controlling tty of that and if it's a VC then we know | |
139 | * the seat and the virtual terminal. Sounds ugly, is only | |
140 | * semi-ugly. */ | |
141 | ||
142 | r = socket_from_display(display, &p); | |
143 | if (r < 0) | |
144 | return r; | |
b92bea5d | 145 | strncpy(sa.un.sun_path, p, sizeof(sa.un.sun_path)-1); |
4d6d6518 LP |
146 | |
147 | fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC, 0); | |
b92bea5d | 148 | if (fd < 0) |
4d6d6518 | 149 | return -errno; |
4d6d6518 | 150 | |
b92bea5d | 151 | if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) |
4d6d6518 | 152 | return -errno; |
4d6d6518 LP |
153 | |
154 | l = sizeof(ucred); | |
155 | r = getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &ucred, &l); | |
4d6d6518 LP |
156 | if (r < 0) |
157 | return -errno; | |
158 | ||
159 | r = get_ctty(ucred.pid, NULL, &tty); | |
160 | if (r < 0) | |
161 | return r; | |
162 | ||
163 | v = vtnr_from_tty(tty); | |
4d6d6518 LP |
164 | if (v < 0) |
165 | return v; | |
166 | else if (v == 0) | |
167 | return -ENOENT; | |
168 | ||
fc7985ed LP |
169 | if (seat) |
170 | *seat = "seat0"; | |
4d6d6518 LP |
171 | *vtnr = (uint32_t) v; |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
98a28fef | 176 | _public_ PAM_EXTERN int pam_sm_open_session( |
8c6db833 LP |
177 | pam_handle_t *handle, |
178 | int flags, | |
179 | int argc, const char **argv) { | |
180 | ||
8c6db833 | 181 | struct passwd *pw; |
fb6becb4 | 182 | bool debug = false; |
485507b8 | 183 | const char *username, *id, *object_path, *runtime_path, *service = NULL, *tty = NULL, *display = NULL, *remote_user = NULL, *remote_host = NULL, *seat = NULL, *type = NULL, *class = NULL, *class_pam = NULL, *cvtnr = NULL; |
98a28fef | 184 | uint32_t uid, pid; |
98a28fef | 185 | int session_fd = -1; |
5a0d49a4 KS |
186 | bool remote; |
187 | unsigned existing; | |
4d6d6518 | 188 | uint32_t vtnr = 0; |
ffcfcb6b | 189 | int r; |
8c6db833 | 190 | |
ffcfcb6b ZJS |
191 | _cleanup_bus_unref_ sd_bus *bus = NULL; |
192 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
193 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
8c6db833 | 194 | |
ffcfcb6b | 195 | assert(handle); |
98a28fef | 196 | |
970edce6 ZJS |
197 | if (debug) |
198 | pam_syslog(handle, LOG_INFO, "pam-systemd initializing"); | |
98a28fef | 199 | |
79d860fe MP |
200 | /* Make this a NOP on non-logind systems */ |
201 | if (!logind_running()) | |
8c6db833 LP |
202 | return PAM_SUCCESS; |
203 | ||
e9fbc77c LP |
204 | if (parse_argv(handle, |
205 | argc, argv, | |
fb6becb4 LP |
206 | &class_pam, |
207 | &debug) < 0) { | |
ed18b08b LP |
208 | r = PAM_SESSION_ERR; |
209 | goto finish; | |
210 | } | |
74fe1fe3 | 211 | |
98a28fef LP |
212 | r = get_user_data(handle, &username, &pw); |
213 | if (r != PAM_SUCCESS) | |
8c6db833 LP |
214 | goto finish; |
215 | ||
30b2c336 LP |
216 | /* Make sure we don't enter a loop by talking to |
217 | * systemd-logind when it is actually waiting for the | |
218 | * background to finish start-up. If the service is | |
5c390a4a | 219 | * "systemd-user" we simply set XDG_RUNTIME_DIR and |
30b2c336 LP |
220 | * leave. */ |
221 | ||
222 | pam_get_item(handle, PAM_SERVICE, (const void**) &service); | |
5c390a4a | 223 | if (streq_ptr(service, "systemd-user")) { |
05a049cc | 224 | _cleanup_free_ char *p = NULL, *rt = NULL; |
30b2c336 | 225 | |
ffcfcb6b ZJS |
226 | if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) pw->pw_uid) < 0) |
227 | return PAM_BUF_ERR; | |
30b2c336 LP |
228 | |
229 | r = parse_env_file(p, NEWLINE, | |
230 | "RUNTIME", &rt, | |
231 | NULL); | |
ffcfcb6b ZJS |
232 | if (r < 0 && r != -ENOENT) |
233 | return PAM_SESSION_ERR; | |
30b2c336 LP |
234 | |
235 | if (rt) { | |
236 | r = pam_misc_setenv(handle, "XDG_RUNTIME_DIR", rt, 0); | |
30b2c336 LP |
237 | if (r != PAM_SUCCESS) { |
238 | pam_syslog(handle, LOG_ERR, "Failed to set runtime dir."); | |
ffcfcb6b | 239 | return r; |
30b2c336 LP |
240 | } |
241 | } | |
242 | ||
ffcfcb6b | 243 | return PAM_SUCCESS; |
8c6db833 LP |
244 | } |
245 | ||
ffcfcb6b | 246 | /* Otherwise, we ask logind to create a session for us */ |
8c6db833 | 247 | |
98a28fef LP |
248 | uid = pw->pw_uid; |
249 | pid = getpid(); | |
250 | ||
98a28fef LP |
251 | pam_get_item(handle, PAM_XDISPLAY, (const void**) &display); |
252 | pam_get_item(handle, PAM_TTY, (const void**) &tty); | |
253 | pam_get_item(handle, PAM_RUSER, (const void**) &remote_user); | |
254 | pam_get_item(handle, PAM_RHOST, (const void**) &remote_host); | |
a8573ccc | 255 | |
bbc73283 | 256 | seat = pam_getenv(handle, "XDG_SEAT"); |
a8573ccc LP |
257 | if (isempty(seat)) |
258 | seat = getenv("XDG_SEAT"); | |
259 | ||
bbc73283 | 260 | cvtnr = pam_getenv(handle, "XDG_VTNR"); |
a8573ccc LP |
261 | if (isempty(cvtnr)) |
262 | cvtnr = getenv("XDG_VTNR"); | |
98a28fef | 263 | |
ed18b08b LP |
264 | service = strempty(service); |
265 | tty = strempty(tty); | |
266 | display = strempty(display); | |
267 | remote_user = strempty(remote_user); | |
268 | remote_host = strempty(remote_host); | |
269 | seat = strempty(seat); | |
98a28fef | 270 | |
ee8545b0 | 271 | if (strchr(tty, ':')) { |
e2acb67b LP |
272 | /* A tty with a colon is usually an X11 display, |
273 | * placed there to show up in utmp. We rearrange | |
274 | * things and don't pretend that an X display was a | |
275 | * tty. */ | |
ee8545b0 LP |
276 | |
277 | if (isempty(display)) | |
278 | display = tty; | |
cd58752a | 279 | tty = ""; |
1a4459d6 | 280 | } else if (streq(tty, "cron")) { |
0ad1271f LP |
281 | /* cron has been setting PAM_TTY to "cron" for a very |
282 | * long time and it probably shouldn't stop doing that | |
283 | * for compatibility reasons. */ | |
1a4459d6 | 284 | tty = ""; |
0ad1271f LP |
285 | type = "unspecified"; |
286 | } else if (streq(tty, "ssh")) { | |
287 | /* ssh has been setting PAM_TTY to "ssh" for a very | |
288 | * long time and probably shouldn't stop doing that | |
289 | * for compatibility reasons. */ | |
290 | tty = ""; | |
291 | type ="tty"; | |
ee8545b0 LP |
292 | } |
293 | ||
8e7705e5 | 294 | /* If this fails vtnr will be 0, that's intended */ |
4d6d6518 LP |
295 | if (!isempty(cvtnr)) |
296 | safe_atou32(cvtnr, &vtnr); | |
297 | ||
fc7985ed LP |
298 | if (!isempty(display) && vtnr <= 0) { |
299 | if (isempty(seat)) | |
6ef25fb6 | 300 | get_seat_from_display(display, &seat, &vtnr); |
fc7985ed | 301 | else if (streq(seat, "seat0")) |
6ef25fb6 | 302 | get_seat_from_display(display, NULL, &vtnr); |
fc7985ed | 303 | } |
4d6d6518 | 304 | |
0ad1271f LP |
305 | if (!type) |
306 | type = !isempty(display) ? "x11" : | |
307 | !isempty(tty) ? "tty" : "unspecified"; | |
98a28fef | 308 | |
55efac6c | 309 | class = pam_getenv(handle, "XDG_SESSION_CLASS"); |
a8573ccc LP |
310 | if (isempty(class)) |
311 | class = getenv("XDG_SESSION_CLASS"); | |
485507b8 MM |
312 | if (isempty(class)) |
313 | class = class_pam; | |
55efac6c | 314 | if (isempty(class)) |
e2acb67b | 315 | class = streq(type, "unspecified") ? "background" : "user"; |
55efac6c LP |
316 | |
317 | remote = !isempty(remote_host) && | |
318 | !streq(remote_host, "localhost") && | |
319 | !streq(remote_host, "localhost.localdomain"); | |
98a28fef | 320 | |
ffcfcb6b | 321 | /* Talk to logind over the message bug */ |
8c6db833 | 322 | |
ffcfcb6b ZJS |
323 | r = sd_bus_open_system(&bus); |
324 | if (r < 0) { | |
325 | pam_syslog(handle, LOG_ERR, "Failed to connect to system bus: %s", strerror(-r)); | |
326 | return PAM_SESSION_ERR; | |
cc377381 LP |
327 | } |
328 | ||
ce959314 MS |
329 | if (debug) |
330 | pam_syslog(handle, LOG_DEBUG, "Asking logind to create session: " | |
f904bdf2 CG |
331 | "uid=%u pid=%u service=%s type=%s class=%s seat=%s vtnr=%u tty=%s display=%s remote=%s remote_user=%s remote_host=%s", |
332 | uid, pid, service, type, class, seat, vtnr, tty, display, yes_no(remote), remote_user, remote_host); | |
ce959314 | 333 | |
ffcfcb6b ZJS |
334 | r = sd_bus_call_method(bus, |
335 | "org.freedesktop.login1", | |
336 | "/org/freedesktop/login1", | |
337 | "org.freedesktop.login1.Manager", | |
338 | "CreateSession", | |
339 | &error, | |
340 | &reply, | |
341 | "uussssussbssa(sv)", | |
342 | uid, | |
343 | pid, | |
344 | service, | |
345 | type, | |
346 | class, | |
347 | seat, | |
348 | vtnr, | |
349 | tty, | |
350 | display, | |
351 | remote, | |
352 | remote_user, | |
353 | remote_host, | |
354 | 0); | |
355 | if (r < 0) { | |
356 | pam_syslog(handle, LOG_ERR, "Failed to communicate with systemd-logind: %s", strerror(-r)); | |
357 | if (error.name || error.message) | |
358 | pam_syslog(handle, LOG_ERR, "systemd-logind returned %s: %s", | |
359 | error.name ?: "unknown error", | |
360 | error.message ?: "no message"); | |
361 | return PAM_SYSTEM_ERR; | |
98a28fef | 362 | } |
74fe1fe3 | 363 | |
ffcfcb6b ZJS |
364 | r = sd_bus_message_read(reply, |
365 | "soshsub", | |
366 | &id, | |
367 | &object_path, | |
368 | &runtime_path, | |
369 | &session_fd, | |
370 | &seat, | |
371 | &vtnr, | |
372 | &existing); | |
373 | if (r < 0) { | |
374 | pam_syslog(handle, LOG_ERR, "Failed to parse message: %s", strerror(-r)); | |
98a28fef LP |
375 | r = PAM_SESSION_ERR; |
376 | goto finish; | |
377 | } | |
74fe1fe3 | 378 | |
ce959314 MS |
379 | if (debug) |
380 | pam_syslog(handle, LOG_DEBUG, "Reply from logind: " | |
381 | "id=%s object_path=%s runtime_path=%s session_fd=%d seat=%s vtnr=%u", | |
382 | id, object_path, runtime_path, session_fd, seat, vtnr); | |
383 | ||
98a28fef LP |
384 | r = pam_misc_setenv(handle, "XDG_SESSION_ID", id, 0); |
385 | if (r != PAM_SUCCESS) { | |
386 | pam_syslog(handle, LOG_ERR, "Failed to set session id."); | |
387 | goto finish; | |
8c6db833 LP |
388 | } |
389 | ||
98a28fef LP |
390 | r = pam_misc_setenv(handle, "XDG_RUNTIME_DIR", runtime_path, 0); |
391 | if (r != PAM_SUCCESS) { | |
392 | pam_syslog(handle, LOG_ERR, "Failed to set runtime dir."); | |
393 | goto finish; | |
394 | } | |
8c6db833 | 395 | |
bbc73283 LP |
396 | if (!isempty(seat)) { |
397 | r = pam_misc_setenv(handle, "XDG_SEAT", seat, 0); | |
398 | if (r != PAM_SUCCESS) { | |
399 | pam_syslog(handle, LOG_ERR, "Failed to set seat."); | |
400 | goto finish; | |
401 | } | |
402 | } | |
403 | ||
404 | if (vtnr > 0) { | |
405 | char buf[11]; | |
406 | snprintf(buf, sizeof(buf), "%u", vtnr); | |
407 | char_array_0(buf); | |
408 | ||
409 | r = pam_misc_setenv(handle, "XDG_VTNR", buf, 0); | |
410 | if (r != PAM_SUCCESS) { | |
411 | pam_syslog(handle, LOG_ERR, "Failed to set virtual terminal number."); | |
412 | goto finish; | |
413 | } | |
414 | } | |
415 | ||
77085881 LP |
416 | r = pam_set_data(handle, "systemd.existing", INT_TO_PTR(!!existing), NULL); |
417 | if (r != PAM_SUCCESS) { | |
418 | pam_syslog(handle, LOG_ERR, "Failed to install existing flag."); | |
ffcfcb6b | 419 | goto finish; |
77085881 LP |
420 | } |
421 | ||
21c390cc LP |
422 | if (session_fd >= 0) { |
423 | r = pam_set_data(handle, "systemd.session-fd", INT_TO_PTR(session_fd+1), NULL); | |
424 | if (r != PAM_SUCCESS) { | |
425 | pam_syslog(handle, LOG_ERR, "Failed to install session fd."); | |
ffcfcb6b | 426 | goto finish; |
21c390cc | 427 | } |
98a28fef | 428 | } |
8c6db833 | 429 | |
ffcfcb6b | 430 | return PAM_SUCCESS; |
8c6db833 | 431 | |
98a28fef | 432 | finish: |
98a28fef LP |
433 | if (session_fd >= 0) |
434 | close_nointr_nofail(session_fd); | |
672c48cc | 435 | |
98a28fef LP |
436 | return r; |
437 | } | |
8c6db833 | 438 | |
98a28fef LP |
439 | _public_ PAM_EXTERN int pam_sm_close_session( |
440 | pam_handle_t *handle, | |
441 | int flags, | |
442 | int argc, const char **argv) { | |
8c6db833 | 443 | |
77085881 | 444 | const void *p = NULL, *existing = NULL; |
75c8e3cf | 445 | const char *id; |
75c8e3cf | 446 | int r; |
8c6db833 | 447 | |
ffcfcb6b ZJS |
448 | _cleanup_bus_unref_ sd_bus *bus = NULL; |
449 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
450 | _cleanup_bus_message_unref_ sd_bus_message *reply = NULL; | |
75c8e3cf | 451 | |
ffcfcb6b | 452 | assert(handle); |
75c8e3cf | 453 | |
77085881 LP |
454 | /* Only release session if it wasn't pre-existing when we |
455 | * tried to create it */ | |
456 | pam_get_data(handle, "systemd.existing", &existing); | |
457 | ||
75c8e3cf | 458 | id = pam_getenv(handle, "XDG_SESSION_ID"); |
77085881 | 459 | if (id && !existing) { |
75c8e3cf LP |
460 | |
461 | /* Before we go and close the FIFO we need to tell | |
462 | * logind that this is a clean session shutdown, so | |
463 | * that it doesn't just go and slaughter us | |
464 | * immediately after closing the fd */ | |
465 | ||
ffcfcb6b ZJS |
466 | r = sd_bus_open_system(&bus); |
467 | if (r < 0) { | |
468 | pam_syslog(handle, LOG_ERR, | |
469 | "Failed to connect to system bus: %s", strerror(-r)); | |
75c8e3cf LP |
470 | r = PAM_SESSION_ERR; |
471 | goto finish; | |
472 | } | |
473 | ||
ffcfcb6b ZJS |
474 | r = sd_bus_call_method(bus, |
475 | "org.freedesktop.login1", | |
476 | "/org/freedesktop/login1", | |
477 | "org.freedesktop.login1.Manager", | |
478 | "ReleaseSession", | |
479 | &error, | |
480 | NULL, | |
481 | "s", | |
482 | id); | |
483 | if (r < 0) { | |
484 | pam_syslog(handle, LOG_ERR, | |
485 | "Failed to release session: %s", strerror(-r)); | |
486 | if (error.name || error.message) | |
487 | pam_syslog(handle, LOG_ERR, "systemd-logind returned %s: %s", | |
488 | error.name ?: "unknown error", | |
489 | error.message ?: "no message"); | |
74fe1fe3 | 490 | |
75c8e3cf LP |
491 | r = PAM_SESSION_ERR; |
492 | goto finish; | |
493 | } | |
494 | } | |
495 | ||
496 | r = PAM_SUCCESS; | |
497 | ||
498 | finish: | |
499 | pam_get_data(handle, "systemd.session-fd", &p); | |
98a28fef LP |
500 | if (p) |
501 | close_nointr(PTR_TO_INT(p) - 1); | |
1f73f0f1 | 502 | |
75c8e3cf | 503 | return r; |
8c6db833 | 504 | } |