1*0Sstevel@tonic-gate /*
2*0Sstevel@tonic-gate * CDDL HEADER START
3*0Sstevel@tonic-gate *
4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the
5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only
6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance
7*0Sstevel@tonic-gate * with the License.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing.
11*0Sstevel@tonic-gate * See the License for the specific language governing permissions
12*0Sstevel@tonic-gate * and limitations under the License.
13*0Sstevel@tonic-gate *
14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each
15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the
17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying
18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner]
19*0Sstevel@tonic-gate *
20*0Sstevel@tonic-gate * CDDL HEADER END
21*0Sstevel@tonic-gate */
22*0Sstevel@tonic-gate /*
23*0Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
24*0Sstevel@tonic-gate * Use is subject to license terms.
25*0Sstevel@tonic-gate */
26*0Sstevel@tonic-gate
27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
28*0Sstevel@tonic-gate
29*0Sstevel@tonic-gate /*
30*0Sstevel@tonic-gate * utmpx.c - utmpx utility routines
31*0Sstevel@tonic-gate *
32*0Sstevel@tonic-gate * Since svc.startd(1M) places utmpx records for its launched instances, it must
33*0Sstevel@tonic-gate * also mark them as dead once completed.
34*0Sstevel@tonic-gate */
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate #include <sys/stat.h>
37*0Sstevel@tonic-gate #include <sys/types.h>
38*0Sstevel@tonic-gate #include <sys/wait.h>
39*0Sstevel@tonic-gate #include <sys/stat.h>
40*0Sstevel@tonic-gate #include <errno.h>
41*0Sstevel@tonic-gate #include <pthread.h>
42*0Sstevel@tonic-gate #include <sac.h>
43*0Sstevel@tonic-gate #include <string.h>
44*0Sstevel@tonic-gate #include <strings.h>
45*0Sstevel@tonic-gate #include <time.h>
46*0Sstevel@tonic-gate #include <unistd.h>
47*0Sstevel@tonic-gate #include <utmpx.h>
48*0Sstevel@tonic-gate #include <fcntl.h>
49*0Sstevel@tonic-gate
50*0Sstevel@tonic-gate #include "startd.h"
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate static const char rlevels[] = { 'S', '0', '1', '2', '3', '4', '5', '6', 0 };
53*0Sstevel@tonic-gate static int n_prev[] = { 0, 0, 0, 0, 0, 0, 0, 0 };
54*0Sstevel@tonic-gate
55*0Sstevel@tonic-gate static pthread_mutex_t utmpx_lock;
56*0Sstevel@tonic-gate static int utmpx_truncated = 0;
57*0Sstevel@tonic-gate
58*0Sstevel@tonic-gate #define USEC_PER_MSEC 1000
59*0Sstevel@tonic-gate
60*0Sstevel@tonic-gate int
utmpx_mark_init(pid_t pid,char * prefix)61*0Sstevel@tonic-gate utmpx_mark_init(pid_t pid, char *prefix)
62*0Sstevel@tonic-gate {
63*0Sstevel@tonic-gate struct utmpx ut, *oldu;
64*0Sstevel@tonic-gate int tmplen;
65*0Sstevel@tonic-gate int ret;
66*0Sstevel@tonic-gate
67*0Sstevel@tonic-gate while (st->st_initial && !utmpx_truncated)
68*0Sstevel@tonic-gate (void) usleep(200 * USEC_PER_MSEC);
69*0Sstevel@tonic-gate
70*0Sstevel@tonic-gate /*
71*0Sstevel@tonic-gate * Clean out any preexisting records for this PID, as they must be
72*0Sstevel@tonic-gate * inaccurate.
73*0Sstevel@tonic-gate */
74*0Sstevel@tonic-gate utmpx_mark_dead(pid, 0, B_TRUE);
75*0Sstevel@tonic-gate
76*0Sstevel@tonic-gate /*
77*0Sstevel@tonic-gate * Construct a new record with the appropriate prefix.
78*0Sstevel@tonic-gate */
79*0Sstevel@tonic-gate (void) memset(&ut, 0, sizeof (ut));
80*0Sstevel@tonic-gate (void) strncpy(ut.ut_user, ".startd", sizeof (ut.ut_user));
81*0Sstevel@tonic-gate ut.ut_pid = pid;
82*0Sstevel@tonic-gate
83*0Sstevel@tonic-gate ut.ut_id[0] = ut.ut_id[1] = ut.ut_id[2] = ut.ut_id[3] = (char)SC_WILDC;
84*0Sstevel@tonic-gate
85*0Sstevel@tonic-gate for (ret = 0; ret < strlen(prefix); ret++)
86*0Sstevel@tonic-gate ut.ut_id[ret] = prefix[ret];
87*0Sstevel@tonic-gate
88*0Sstevel@tonic-gate ut.ut_type = INIT_PROCESS;
89*0Sstevel@tonic-gate (void) time(&ut.ut_tv.tv_sec);
90*0Sstevel@tonic-gate
91*0Sstevel@tonic-gate for (;;) {
92*0Sstevel@tonic-gate MUTEX_LOCK(&utmpx_lock);
93*0Sstevel@tonic-gate setutxent();
94*0Sstevel@tonic-gate
95*0Sstevel@tonic-gate if ((oldu = getutxid(&ut)) != NULL) {
96*0Sstevel@tonic-gate /*
97*0Sstevel@tonic-gate * Copy in the old "line" and "host" fields.
98*0Sstevel@tonic-gate */
99*0Sstevel@tonic-gate bcopy(oldu->ut_line, ut.ut_line, sizeof (ut.ut_line));
100*0Sstevel@tonic-gate bcopy(oldu->ut_host, ut.ut_host, sizeof (ut.ut_host));
101*0Sstevel@tonic-gate ut.ut_syslen = (tmplen = strlen(ut.ut_host)) ?
102*0Sstevel@tonic-gate min(tmplen + 1, sizeof (ut.ut_host)) : 0;
103*0Sstevel@tonic-gate }
104*0Sstevel@tonic-gate
105*0Sstevel@tonic-gate if (makeutx(&ut) != NULL)
106*0Sstevel@tonic-gate break;
107*0Sstevel@tonic-gate
108*0Sstevel@tonic-gate if (errno != EROFS)
109*0Sstevel@tonic-gate log_framework(LOG_WARNING,
110*0Sstevel@tonic-gate "makeutx failed, retrying: %s\n", strerror(errno));
111*0Sstevel@tonic-gate
112*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
113*0Sstevel@tonic-gate
114*0Sstevel@tonic-gate (void) sleep(1);
115*0Sstevel@tonic-gate }
116*0Sstevel@tonic-gate
117*0Sstevel@tonic-gate updwtmpx(WTMPX_FILE, &ut);
118*0Sstevel@tonic-gate
119*0Sstevel@tonic-gate endutxent();
120*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
121*0Sstevel@tonic-gate
122*0Sstevel@tonic-gate return (ret);
123*0Sstevel@tonic-gate }
124*0Sstevel@tonic-gate
125*0Sstevel@tonic-gate void
utmpx_mark_dead(pid_t pid,int status,boolean_t blocking)126*0Sstevel@tonic-gate utmpx_mark_dead(pid_t pid, int status, boolean_t blocking)
127*0Sstevel@tonic-gate {
128*0Sstevel@tonic-gate struct utmpx *up;
129*0Sstevel@tonic-gate int logged = 0;
130*0Sstevel@tonic-gate
131*0Sstevel@tonic-gate for (;;) {
132*0Sstevel@tonic-gate int found = 0;
133*0Sstevel@tonic-gate
134*0Sstevel@tonic-gate MUTEX_LOCK(&utmpx_lock);
135*0Sstevel@tonic-gate setutxent();
136*0Sstevel@tonic-gate
137*0Sstevel@tonic-gate while (up = getutxent()) {
138*0Sstevel@tonic-gate if (up->ut_pid == pid) {
139*0Sstevel@tonic-gate found = 1;
140*0Sstevel@tonic-gate
141*0Sstevel@tonic-gate if (up->ut_type == DEAD_PROCESS) {
142*0Sstevel@tonic-gate /*
143*0Sstevel@tonic-gate * Cleaned up elsewhere.
144*0Sstevel@tonic-gate */
145*0Sstevel@tonic-gate endutxent();
146*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
147*0Sstevel@tonic-gate return;
148*0Sstevel@tonic-gate }
149*0Sstevel@tonic-gate
150*0Sstevel@tonic-gate up->ut_type = DEAD_PROCESS;
151*0Sstevel@tonic-gate up->ut_exit.e_termination = WTERMSIG(status);
152*0Sstevel@tonic-gate up->ut_exit.e_exit = WEXITSTATUS(status);
153*0Sstevel@tonic-gate (void) time(&up->ut_tv.tv_sec);
154*0Sstevel@tonic-gate
155*0Sstevel@tonic-gate if (pututxline(up) != NULL) {
156*0Sstevel@tonic-gate /*
157*0Sstevel@tonic-gate * Now attempt to add to the end of the
158*0Sstevel@tonic-gate * wtmp and wtmpx files. Do not create
159*0Sstevel@tonic-gate * if they don't already exist.
160*0Sstevel@tonic-gate */
161*0Sstevel@tonic-gate updwtmpx(WTMPX_FILE, up);
162*0Sstevel@tonic-gate endutxent();
163*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
164*0Sstevel@tonic-gate
165*0Sstevel@tonic-gate return;
166*0Sstevel@tonic-gate }
167*0Sstevel@tonic-gate }
168*0Sstevel@tonic-gate }
169*0Sstevel@tonic-gate
170*0Sstevel@tonic-gate endutxent();
171*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
172*0Sstevel@tonic-gate
173*0Sstevel@tonic-gate if (!found || !blocking)
174*0Sstevel@tonic-gate return;
175*0Sstevel@tonic-gate
176*0Sstevel@tonic-gate if (!logged) {
177*0Sstevel@tonic-gate log_framework(LOG_INFO, "retrying utmpx_dead on PID "
178*0Sstevel@tonic-gate "%ld\n", pid);
179*0Sstevel@tonic-gate logged++;
180*0Sstevel@tonic-gate }
181*0Sstevel@tonic-gate
182*0Sstevel@tonic-gate (void) sleep(1);
183*0Sstevel@tonic-gate }
184*0Sstevel@tonic-gate }
185*0Sstevel@tonic-gate
186*0Sstevel@tonic-gate static void
utmpx_check()187*0Sstevel@tonic-gate utmpx_check()
188*0Sstevel@tonic-gate {
189*0Sstevel@tonic-gate struct stat sb;
190*0Sstevel@tonic-gate
191*0Sstevel@tonic-gate if (stat(_UTMPX_FILE, &sb) == 0 &&
192*0Sstevel@tonic-gate sb.st_mode != (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))
193*0Sstevel@tonic-gate (void) chmod(_UTMPX_FILE, S_IRUSR | S_IWUSR | S_IRGRP |
194*0Sstevel@tonic-gate S_IROTH);
195*0Sstevel@tonic-gate
196*0Sstevel@tonic-gate if (stat(_WTMPX_FILE, &sb) == 0 &&
197*0Sstevel@tonic-gate sb.st_mode != (S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))
198*0Sstevel@tonic-gate (void) chmod(_WTMPX_FILE, S_IRUSR | S_IWUSR | S_IRGRP |
199*0Sstevel@tonic-gate S_IROTH);
200*0Sstevel@tonic-gate }
201*0Sstevel@tonic-gate
202*0Sstevel@tonic-gate /*
203*0Sstevel@tonic-gate * Retrieve the runlevel utmpx entry if there is one; used to recover
204*0Sstevel@tonic-gate * state when svc.startd is restarted.
205*0Sstevel@tonic-gate */
206*0Sstevel@tonic-gate char
utmpx_get_runlevel(void)207*0Sstevel@tonic-gate utmpx_get_runlevel(void)
208*0Sstevel@tonic-gate {
209*0Sstevel@tonic-gate struct utmpx *up;
210*0Sstevel@tonic-gate char rl = '\0';
211*0Sstevel@tonic-gate
212*0Sstevel@tonic-gate MUTEX_LOCK(&utmpx_lock);
213*0Sstevel@tonic-gate setutxent();
214*0Sstevel@tonic-gate
215*0Sstevel@tonic-gate while (up = getutxent()) {
216*0Sstevel@tonic-gate if (up->ut_type == RUN_LVL &&
217*0Sstevel@tonic-gate sscanf(up->ut_line, RUNLVL_MSG, &rl) == 1)
218*0Sstevel@tonic-gate break;
219*0Sstevel@tonic-gate }
220*0Sstevel@tonic-gate endutxent();
221*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
222*0Sstevel@tonic-gate
223*0Sstevel@tonic-gate return (rl);
224*0Sstevel@tonic-gate }
225*0Sstevel@tonic-gate
226*0Sstevel@tonic-gate void
utmpx_set_runlevel(char runlevel,char oldrl,boolean_t do_bump)227*0Sstevel@tonic-gate utmpx_set_runlevel(char runlevel, char oldrl, boolean_t do_bump)
228*0Sstevel@tonic-gate {
229*0Sstevel@tonic-gate struct utmpx u;
230*0Sstevel@tonic-gate struct utmpx *oup;
231*0Sstevel@tonic-gate size_t tmplen;
232*0Sstevel@tonic-gate int i;
233*0Sstevel@tonic-gate
234*0Sstevel@tonic-gate if (runlevel == 's')
235*0Sstevel@tonic-gate runlevel = 'S';
236*0Sstevel@tonic-gate if (oldrl == 's')
237*0Sstevel@tonic-gate oldrl = 'S';
238*0Sstevel@tonic-gate
239*0Sstevel@tonic-gate bzero(&u, sizeof (struct utmpx));
240*0Sstevel@tonic-gate
241*0Sstevel@tonic-gate u.ut_id[0] = u.ut_id[1] = u.ut_id[2] = u.ut_id[3] = '\0';
242*0Sstevel@tonic-gate u.ut_pid = 0;
243*0Sstevel@tonic-gate u.ut_type = RUN_LVL;
244*0Sstevel@tonic-gate
245*0Sstevel@tonic-gate (void) time(&u.ut_tv.tv_sec);
246*0Sstevel@tonic-gate
247*0Sstevel@tonic-gate MUTEX_LOCK(&utmpx_lock);
248*0Sstevel@tonic-gate setutxent();
249*0Sstevel@tonic-gate
250*0Sstevel@tonic-gate if ((oup = getutxid(&u)) != NULL) {
251*0Sstevel@tonic-gate bcopy(oup->ut_host, u.ut_host, sizeof (u.ut_host));
252*0Sstevel@tonic-gate bcopy(oup->ut_line, u.ut_line, sizeof (u.ut_line));
253*0Sstevel@tonic-gate bcopy(oup->ut_user, u.ut_user, sizeof (u.ut_user));
254*0Sstevel@tonic-gate
255*0Sstevel@tonic-gate tmplen = strlen(u.ut_host);
256*0Sstevel@tonic-gate if (tmplen)
257*0Sstevel@tonic-gate u.ut_syslen = min(tmplen + 1, sizeof (u.ut_host));
258*0Sstevel@tonic-gate else
259*0Sstevel@tonic-gate u.ut_syslen = 0;
260*0Sstevel@tonic-gate }
261*0Sstevel@tonic-gate
262*0Sstevel@tonic-gate if (oldrl != '\0')
263*0Sstevel@tonic-gate u.ut_exit.e_exit = oldrl;
264*0Sstevel@tonic-gate else if (oup != NULL)
265*0Sstevel@tonic-gate u.ut_exit.e_exit = oup->ut_exit.e_termination;
266*0Sstevel@tonic-gate else
267*0Sstevel@tonic-gate u.ut_exit.e_exit = '0';
268*0Sstevel@tonic-gate
269*0Sstevel@tonic-gate u.ut_exit.e_termination = runlevel;
270*0Sstevel@tonic-gate
271*0Sstevel@tonic-gate for (i = 0; rlevels[i] != '\0'; ++i) {
272*0Sstevel@tonic-gate if (rlevels[i] == runlevel)
273*0Sstevel@tonic-gate break;
274*0Sstevel@tonic-gate }
275*0Sstevel@tonic-gate
276*0Sstevel@tonic-gate u.ut_pid = n_prev[i];
277*0Sstevel@tonic-gate
278*0Sstevel@tonic-gate if (do_bump) {
279*0Sstevel@tonic-gate for (i = 0; rlevels[i] != '\0'; ++i) {
280*0Sstevel@tonic-gate if (rlevels[i] == u.ut_exit.e_exit)
281*0Sstevel@tonic-gate break;
282*0Sstevel@tonic-gate }
283*0Sstevel@tonic-gate
284*0Sstevel@tonic-gate ++n_prev[i];
285*0Sstevel@tonic-gate }
286*0Sstevel@tonic-gate
287*0Sstevel@tonic-gate (void) sprintf(u.ut_line, RUNLVL_MSG, runlevel);
288*0Sstevel@tonic-gate
289*0Sstevel@tonic-gate if (pututxline(&u) == NULL) {
290*0Sstevel@tonic-gate endutxent();
291*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
292*0Sstevel@tonic-gate
293*0Sstevel@tonic-gate return;
294*0Sstevel@tonic-gate }
295*0Sstevel@tonic-gate
296*0Sstevel@tonic-gate updwtmpx(WTMPX_FILE, &u);
297*0Sstevel@tonic-gate
298*0Sstevel@tonic-gate endutxent();
299*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
300*0Sstevel@tonic-gate
301*0Sstevel@tonic-gate utmpx_check();
302*0Sstevel@tonic-gate }
303*0Sstevel@tonic-gate
304*0Sstevel@tonic-gate static void
utmpx_write_entry(short type,const char * msg,time_t tstamp)305*0Sstevel@tonic-gate utmpx_write_entry(short type, const char *msg, time_t tstamp)
306*0Sstevel@tonic-gate {
307*0Sstevel@tonic-gate struct utmpx u;
308*0Sstevel@tonic-gate struct utmpx *oup;
309*0Sstevel@tonic-gate size_t tmplen;
310*0Sstevel@tonic-gate
311*0Sstevel@tonic-gate bzero(&u, sizeof (struct utmpx));
312*0Sstevel@tonic-gate
313*0Sstevel@tonic-gate u.ut_id[0] = u.ut_id[1] = u.ut_id[2] = u.ut_id[3] = '\0';
314*0Sstevel@tonic-gate u.ut_pid = 0;
315*0Sstevel@tonic-gate
316*0Sstevel@tonic-gate u.ut_exit.e_termination = WTERMSIG(0);
317*0Sstevel@tonic-gate u.ut_exit.e_exit = WEXITSTATUS(0);
318*0Sstevel@tonic-gate u.ut_type = type;
319*0Sstevel@tonic-gate u.ut_tv.tv_sec = tstamp;
320*0Sstevel@tonic-gate
321*0Sstevel@tonic-gate MUTEX_LOCK(&utmpx_lock);
322*0Sstevel@tonic-gate setutxent();
323*0Sstevel@tonic-gate
324*0Sstevel@tonic-gate if ((oup = getutxid(&u)) != NULL) {
325*0Sstevel@tonic-gate bcopy(oup->ut_user, u.ut_user, sizeof (u.ut_user));
326*0Sstevel@tonic-gate bcopy(oup->ut_line, u.ut_line, sizeof (u.ut_line));
327*0Sstevel@tonic-gate bcopy(oup->ut_host, u.ut_host, sizeof (u.ut_host));
328*0Sstevel@tonic-gate
329*0Sstevel@tonic-gate tmplen = strlen(u.ut_host);
330*0Sstevel@tonic-gate if (tmplen)
331*0Sstevel@tonic-gate u.ut_syslen = min(tmplen + 1, sizeof (u.ut_host));
332*0Sstevel@tonic-gate else
333*0Sstevel@tonic-gate u.ut_syslen = 0;
334*0Sstevel@tonic-gate }
335*0Sstevel@tonic-gate
336*0Sstevel@tonic-gate (void) sprintf(u.ut_line, "%.12s", msg);
337*0Sstevel@tonic-gate
338*0Sstevel@tonic-gate if (pututxline(&u) == NULL) {
339*0Sstevel@tonic-gate endutxent();
340*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
341*0Sstevel@tonic-gate
342*0Sstevel@tonic-gate return;
343*0Sstevel@tonic-gate }
344*0Sstevel@tonic-gate
345*0Sstevel@tonic-gate updwtmpx(WTMPX_FILE, &u);
346*0Sstevel@tonic-gate
347*0Sstevel@tonic-gate endutxent();
348*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
349*0Sstevel@tonic-gate
350*0Sstevel@tonic-gate utmpx_check();
351*0Sstevel@tonic-gate }
352*0Sstevel@tonic-gate
353*0Sstevel@tonic-gate void
utmpx_write_boottime(void)354*0Sstevel@tonic-gate utmpx_write_boottime(void)
355*0Sstevel@tonic-gate {
356*0Sstevel@tonic-gate time_t tstamp;
357*0Sstevel@tonic-gate struct stat stbuf;
358*0Sstevel@tonic-gate
359*0Sstevel@tonic-gate /*
360*0Sstevel@tonic-gate * The DOWN_TIME record tracks when the OS became unavailable
361*0Sstevel@tonic-gate * during the previous boot. We stat(2) WTMPX and check its
362*0Sstevel@tonic-gate * attributes to determine when (and how) the OS became
363*0Sstevel@tonic-gate * unavailable. If the file is empty, skip writing a DOWN_TIME
364*0Sstevel@tonic-gate * record. Otherwise, check the access and modify times and
365*0Sstevel@tonic-gate * use whichever is latest as the time that the OS became
366*0Sstevel@tonic-gate * unavailable. If st_atime is latest, the instance crashed or
367*0Sstevel@tonic-gate * the machine lost power. If st_mtime is latest, the shutdown
368*0Sstevel@tonic-gate * was controlled.
369*0Sstevel@tonic-gate */
370*0Sstevel@tonic-gate if (stat(WTMPX_FILE, &stbuf) == 0 && stbuf.st_size != 0) {
371*0Sstevel@tonic-gate tstamp = (stbuf.st_atime >= stbuf.st_mtime) ?
372*0Sstevel@tonic-gate stbuf.st_atime : stbuf.st_mtime;
373*0Sstevel@tonic-gate utmpx_write_entry(DOWN_TIME, DOWN_MSG, tstamp);
374*0Sstevel@tonic-gate }
375*0Sstevel@tonic-gate
376*0Sstevel@tonic-gate /*
377*0Sstevel@tonic-gate * The boot time (or start time, for a non-global zone) is retrieved in
378*0Sstevel@tonic-gate * log_init().
379*0Sstevel@tonic-gate */
380*0Sstevel@tonic-gate tstamp = st->st_start_time.tv_sec;
381*0Sstevel@tonic-gate
382*0Sstevel@tonic-gate utmpx_write_entry(BOOT_TIME, BOOT_MSG, tstamp);
383*0Sstevel@tonic-gate }
384*0Sstevel@tonic-gate
385*0Sstevel@tonic-gate /*
386*0Sstevel@tonic-gate * void utmpx_clear_old(void)
387*0Sstevel@tonic-gate * At boot and only at boot, truncate the utmpx file.
388*0Sstevel@tonic-gate *
389*0Sstevel@tonic-gate */
390*0Sstevel@tonic-gate void
utmpx_clear_old(void)391*0Sstevel@tonic-gate utmpx_clear_old(void)
392*0Sstevel@tonic-gate {
393*0Sstevel@tonic-gate int fd;
394*0Sstevel@tonic-gate mode_t mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
395*0Sstevel@tonic-gate
396*0Sstevel@tonic-gate if (!st->st_initial || utmpx_truncated)
397*0Sstevel@tonic-gate return;
398*0Sstevel@tonic-gate
399*0Sstevel@tonic-gate MUTEX_LOCK(&utmpx_lock);
400*0Sstevel@tonic-gate
401*0Sstevel@tonic-gate if ((fd = open(_UTMPX_FILE,
402*0Sstevel@tonic-gate O_WRONLY | O_CREAT | O_TRUNC, mode)) != -1) {
403*0Sstevel@tonic-gate (void) fchmod(fd, mode); /* force mode regardless of umask() */
404*0Sstevel@tonic-gate (void) fchown(fd, 0, 2); /* force owner to root/bin */
405*0Sstevel@tonic-gate (void) close(fd);
406*0Sstevel@tonic-gate } else {
407*0Sstevel@tonic-gate log_framework(LOG_NOTICE, "Unable to create %s: %s\n",
408*0Sstevel@tonic-gate _UTMPX_FILE, strerror(errno));
409*0Sstevel@tonic-gate }
410*0Sstevel@tonic-gate
411*0Sstevel@tonic-gate utmpx_truncated = 1;
412*0Sstevel@tonic-gate
413*0Sstevel@tonic-gate MUTEX_UNLOCK(&utmpx_lock);
414*0Sstevel@tonic-gate }
415*0Sstevel@tonic-gate
416*0Sstevel@tonic-gate void
utmpx_init()417*0Sstevel@tonic-gate utmpx_init()
418*0Sstevel@tonic-gate {
419*0Sstevel@tonic-gate (void) pthread_mutex_init(&utmpx_lock, &mutex_attrs);
420*0Sstevel@tonic-gate }
421