xref: /illumos-gate/usr/src/cmd/ttymon/tmlog.c (revision 3bb2c156)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
57c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
67c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
77c478bd9Sstevel@tonic-gate  * with the License.
87c478bd9Sstevel@tonic-gate  *
97c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
107c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
117c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
127c478bd9Sstevel@tonic-gate  * and limitations under the License.
137c478bd9Sstevel@tonic-gate  *
147c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
157c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
167c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
177c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
187c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
197c478bd9Sstevel@tonic-gate  *
207c478bd9Sstevel@tonic-gate  * CDDL HEADER END
217c478bd9Sstevel@tonic-gate  */
227c478bd9Sstevel@tonic-gate /*
237c478bd9Sstevel@tonic-gate  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
277c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28*3bb2c156SToomas Soome /*	  All Rights Reserved	*/
297c478bd9Sstevel@tonic-gate 
307c478bd9Sstevel@tonic-gate /*
317c478bd9Sstevel@tonic-gate  * error/logging/cleanup functions for ttymon.
327c478bd9Sstevel@tonic-gate  */
337c478bd9Sstevel@tonic-gate 
347c478bd9Sstevel@tonic-gate #include <unistd.h>
357c478bd9Sstevel@tonic-gate #include <stdlib.h>
367c478bd9Sstevel@tonic-gate #include <stdio.h>
377c478bd9Sstevel@tonic-gate #include <fcntl.h>
387c478bd9Sstevel@tonic-gate #include <string.h>
397c478bd9Sstevel@tonic-gate #include <errno.h>
407c478bd9Sstevel@tonic-gate #include <stdarg.h>
417c478bd9Sstevel@tonic-gate #include <time.h>
427c478bd9Sstevel@tonic-gate #include <sys/types.h>
437c478bd9Sstevel@tonic-gate #include <sys/stat.h>
447c478bd9Sstevel@tonic-gate #include <sys/param.h>
457c478bd9Sstevel@tonic-gate #include <signal.h>
467c478bd9Sstevel@tonic-gate #include <syslog.h>
477c478bd9Sstevel@tonic-gate #include "ttymon.h"
487c478bd9Sstevel@tonic-gate #include "tmstruct.h"
497c478bd9Sstevel@tonic-gate #include "tmextern.h"
507c478bd9Sstevel@tonic-gate 
517c478bd9Sstevel@tonic-gate const char *appname = "ttymon";
527c478bd9Sstevel@tonic-gate 
537c478bd9Sstevel@tonic-gate void
openttymonlog(void)547c478bd9Sstevel@tonic-gate openttymonlog(void)
557c478bd9Sstevel@tonic-gate {
567c478bd9Sstevel@tonic-gate 	int	fd, ret;
577c478bd9Sstevel@tonic-gate 	char	logfile[MAXPATHLEN];
587c478bd9Sstevel@tonic-gate 
597c478bd9Sstevel@tonic-gate 	/* the log file resides in /var/saf/pmtag/ */
607c478bd9Sstevel@tonic-gate 	(void) snprintf(logfile, sizeof (logfile), "%s%s/%s", LOGDIR, Tag,
617c478bd9Sstevel@tonic-gate 	    LOGFILE);
627c478bd9Sstevel@tonic-gate 
637c478bd9Sstevel@tonic-gate 	Logfp = NULL;
64*3bb2c156SToomas Soome 	(void) close(0);
65*3bb2c156SToomas Soome 	if ((fd = open(logfile, O_WRONLY | O_CREAT | O_APPEND, 0444)) != -1)
667c478bd9Sstevel@tonic-gate 		if ((ret = fcntl(fd, F_DUPFD, 3)) == 3) {
677c478bd9Sstevel@tonic-gate 			/* set close-on-exec flag */
687c478bd9Sstevel@tonic-gate 			if (fcntl(ret, F_SETFD, FD_CLOEXEC) == 0) {
697c478bd9Sstevel@tonic-gate 				Logfp = fdopen(ret, "a+");
707c478bd9Sstevel@tonic-gate 			}
717c478bd9Sstevel@tonic-gate 		}
727c478bd9Sstevel@tonic-gate 	if (!Logfp) {
737c478bd9Sstevel@tonic-gate 		cons_printf("ttymon cannot create log file \"%s\": %s\n",
747c478bd9Sstevel@tonic-gate 		    logfile, strerror(errno));
757c478bd9Sstevel@tonic-gate 		exit(1);
767c478bd9Sstevel@tonic-gate 	}
777c478bd9Sstevel@tonic-gate 	log(" ");
787c478bd9Sstevel@tonic-gate 	log("********** ttymon starting **********");
797c478bd9Sstevel@tonic-gate 
807c478bd9Sstevel@tonic-gate #ifdef	DEBUG
817c478bd9Sstevel@tonic-gate 	log("fd(log)\t = %d", fileno(Logfp));
827c478bd9Sstevel@tonic-gate #endif
837c478bd9Sstevel@tonic-gate }
847c478bd9Sstevel@tonic-gate 
857c478bd9Sstevel@tonic-gate static void
roll_log(void)86*3bb2c156SToomas Soome roll_log(void)
877c478bd9Sstevel@tonic-gate {
887c478bd9Sstevel@tonic-gate 	char logf[MAXPATHLEN];
897c478bd9Sstevel@tonic-gate 	char ologf[MAXPATHLEN];
907c478bd9Sstevel@tonic-gate 	char tlogf[MAXPATHLEN];
917c478bd9Sstevel@tonic-gate 	FILE *nlogfp;
927c478bd9Sstevel@tonic-gate 	struct stat buf;
937c478bd9Sstevel@tonic-gate 
947c478bd9Sstevel@tonic-gate 	(void) fprintf(Logfp, "Restarting log file\n");
957c478bd9Sstevel@tonic-gate 	(void) snprintf(logf, sizeof (logf), "%s%s/%s", LOGDIR, Tag, LOGFILE);
967c478bd9Sstevel@tonic-gate 
977c478bd9Sstevel@tonic-gate 	(void) snprintf(ologf, sizeof (ologf), "%s%s/%s", LOGDIR, Tag,
987c478bd9Sstevel@tonic-gate 	    OLOGFILE);
997c478bd9Sstevel@tonic-gate 
1007c478bd9Sstevel@tonic-gate 	(void) snprintf(tlogf, sizeof (tlogf), "%s%s/%s", LOGDIR, Tag,
1017c478bd9Sstevel@tonic-gate 	    TLOGFILE);
1027c478bd9Sstevel@tonic-gate 
1037c478bd9Sstevel@tonic-gate 	if (!stat(ologf, &buf) && rename(ologf, tlogf)) {
1047c478bd9Sstevel@tonic-gate 		(void) fprintf(Logfp, "rename old to tmp file failed\n");
1057c478bd9Sstevel@tonic-gate 	} else if (!stat(logf, &buf) && rename(logf, ologf)) {
1067c478bd9Sstevel@tonic-gate 		(void) fprintf(Logfp, "rename log to old file failed\n");
1077c478bd9Sstevel@tonic-gate 		/* Restore old log file */
1087c478bd9Sstevel@tonic-gate 		if (!stat(tlogf, &buf) && rename(tlogf, ologf))
1097c478bd9Sstevel@tonic-gate 			(void) fprintf(Logfp,
1107c478bd9Sstevel@tonic-gate 			    "rename tmp to old file failed\n");
111*3bb2c156SToomas Soome 	} else if ((nlogfp = fopen(logf, "w")) != NULL) {
1127c478bd9Sstevel@tonic-gate 		(void) fclose(Logfp);
1137c478bd9Sstevel@tonic-gate 		Logfp = nlogfp;
1147c478bd9Sstevel@tonic-gate 		/* reset close-on-exec */
1157c478bd9Sstevel@tonic-gate 		(void) fcntl(fileno(Logfp), F_SETFD, 1);
1167c478bd9Sstevel@tonic-gate 	} else {
1177c478bd9Sstevel@tonic-gate 		(void) fprintf(Logfp, "log file open failed\n");
1187c478bd9Sstevel@tonic-gate 		/* Restore current and old log file */
1197c478bd9Sstevel@tonic-gate 		if (!stat(ologf, &buf) && rename(ologf, logf))
1207c478bd9Sstevel@tonic-gate 			(void) fprintf(Logfp,
1217c478bd9Sstevel@tonic-gate 			    "rename old to log file failed\n");
1227c478bd9Sstevel@tonic-gate 		else if (!stat(tlogf, &buf) && rename(tlogf, ologf))
1237c478bd9Sstevel@tonic-gate 			(void) fprintf(Logfp,
1247c478bd9Sstevel@tonic-gate 			    "rename tmp to old file failed\n");
1257c478bd9Sstevel@tonic-gate 	}
1267c478bd9Sstevel@tonic-gate 
1277c478bd9Sstevel@tonic-gate 	(void) unlink(tlogf); /* remove any stale tmp logfile */
1287c478bd9Sstevel@tonic-gate }
1297c478bd9Sstevel@tonic-gate 
1307c478bd9Sstevel@tonic-gate 
1317c478bd9Sstevel@tonic-gate /*
1327c478bd9Sstevel@tonic-gate  * vlog(msg) - common message routine.
1337c478bd9Sstevel@tonic-gate  *	    - if Logfp is NULL, write message to stderr or CONSOLE
1347c478bd9Sstevel@tonic-gate  */
1357c478bd9Sstevel@tonic-gate static void
vlog(const char * fmt,va_list ap)1367c478bd9Sstevel@tonic-gate vlog(const char *fmt, va_list ap)
1377c478bd9Sstevel@tonic-gate {
1387c478bd9Sstevel@tonic-gate 	char *timestamp;	/* current time in readable form */
1397c478bd9Sstevel@tonic-gate 	time_t clock;		/* current time in seconds */
1407c478bd9Sstevel@tonic-gate 	int	fd;
1417c478bd9Sstevel@tonic-gate 	struct stat buf;
1427c478bd9Sstevel@tonic-gate 
1437c478bd9Sstevel@tonic-gate 	if (Logfp) {
1447c478bd9Sstevel@tonic-gate 		if ((fstat(fileno(Logfp), &buf) != -1) &&
1457c478bd9Sstevel@tonic-gate 		    (buf.st_size >= Logmaxsz) && !Splflag) {
1467c478bd9Sstevel@tonic-gate 			Splflag = 1;
1477c478bd9Sstevel@tonic-gate 			roll_log();
1487c478bd9Sstevel@tonic-gate 			Splflag = 0;
1497c478bd9Sstevel@tonic-gate 		}
1507c478bd9Sstevel@tonic-gate 
1517c478bd9Sstevel@tonic-gate 		(void) time(&clock);
1527c478bd9Sstevel@tonic-gate 		timestamp = ctime(&clock);
1537c478bd9Sstevel@tonic-gate 		*(strchr(timestamp, '\n')) = '\0';
1547c478bd9Sstevel@tonic-gate 		(void) fprintf(Logfp, "%s; %ld; ", timestamp, getpid());
1557c478bd9Sstevel@tonic-gate 		(void) vfprintf(Logfp, fmt, ap);
1567c478bd9Sstevel@tonic-gate 		if (fmt[strlen(fmt) - 1] != '\n')
1577c478bd9Sstevel@tonic-gate 			(void) fputc('\n', Logfp);
1587c478bd9Sstevel@tonic-gate 		(void) fflush(Logfp);
1597c478bd9Sstevel@tonic-gate 	} else if (isatty(STDERR_FILENO)) {
1607c478bd9Sstevel@tonic-gate 		(void) fprintf(stderr, "%s: ", appname);
1617c478bd9Sstevel@tonic-gate 		(void) vfprintf(stderr, fmt, ap);
1627c478bd9Sstevel@tonic-gate 		if (fmt[strlen(fmt) - 1] != '\n')
1637c478bd9Sstevel@tonic-gate 			(void) fputc('\n', stderr);
1647c478bd9Sstevel@tonic-gate 		(void) fflush(stderr);
1657c478bd9Sstevel@tonic-gate 	} else if ((fd = open(CONSOLE, O_WRONLY|O_NOCTTY)) != -1) {
1667c478bd9Sstevel@tonic-gate 		FILE *f = fdopen(fd, "w");
1677c478bd9Sstevel@tonic-gate 
1687c478bd9Sstevel@tonic-gate 		(void) fprintf(f, "%s: ", appname);
1697c478bd9Sstevel@tonic-gate 		(void) vfprintf(f, fmt, ap);
1707c478bd9Sstevel@tonic-gate 		if (fmt[strlen(fmt) - 1] != '\n')
1717c478bd9Sstevel@tonic-gate 			(void) fputc('\n', f);
1727c478bd9Sstevel@tonic-gate 		(void) fclose(f);
1737c478bd9Sstevel@tonic-gate 	} else {
1747c478bd9Sstevel@tonic-gate 		vsyslog(LOG_CRIT, fmt, ap);
1757c478bd9Sstevel@tonic-gate 	}
1767c478bd9Sstevel@tonic-gate }
1777c478bd9Sstevel@tonic-gate 
1787c478bd9Sstevel@tonic-gate /*
1797c478bd9Sstevel@tonic-gate  * log(fmt, ...) - put a message into the log file
1807c478bd9Sstevel@tonic-gate  *	    - if Logfp is NULL, write message to stderr or CONSOLE
1817c478bd9Sstevel@tonic-gate  */
1827c478bd9Sstevel@tonic-gate /*PRINTFLIKE1*/
1837c478bd9Sstevel@tonic-gate void
log(const char * fmt,...)1847c478bd9Sstevel@tonic-gate log(const char *fmt, ...)
1857c478bd9Sstevel@tonic-gate {
1867c478bd9Sstevel@tonic-gate 	va_list ap;
1877c478bd9Sstevel@tonic-gate 	va_start(ap, fmt);
1887c478bd9Sstevel@tonic-gate 	vlog(fmt, ap);
1897c478bd9Sstevel@tonic-gate 	va_end(ap);
1907c478bd9Sstevel@tonic-gate }
1917c478bd9Sstevel@tonic-gate 
1927c478bd9Sstevel@tonic-gate 
1937c478bd9Sstevel@tonic-gate /*
1947c478bd9Sstevel@tonic-gate  * fatal(fmt, ...) - put a message into the log file, then exit.
1957c478bd9Sstevel@tonic-gate  */
1967c478bd9Sstevel@tonic-gate /*PRINTFLIKE1*/
1977c478bd9Sstevel@tonic-gate void
fatal(const char * fmt,...)1987c478bd9Sstevel@tonic-gate fatal(const char *fmt, ...)
1997c478bd9Sstevel@tonic-gate {
2007c478bd9Sstevel@tonic-gate 	if (fmt) {
2017c478bd9Sstevel@tonic-gate 		va_list ap;
2027c478bd9Sstevel@tonic-gate 		va_start(ap, fmt);
2037c478bd9Sstevel@tonic-gate 		vlog(fmt, ap);
2047c478bd9Sstevel@tonic-gate 		va_end(ap);
2057c478bd9Sstevel@tonic-gate 	}
2067c478bd9Sstevel@tonic-gate 	log("********** ttymon exiting ***********");
2077c478bd9Sstevel@tonic-gate 	exit(1);
2087c478bd9Sstevel@tonic-gate }
2097c478bd9Sstevel@tonic-gate 
210*3bb2c156SToomas Soome #ifdef DEBUG
2117c478bd9Sstevel@tonic-gate 
2127c478bd9Sstevel@tonic-gate /*
2137c478bd9Sstevel@tonic-gate  * opendebug - open debugging file, sets global file pointer Debugfp
214*3bb2c156SToomas Soome  *	arg:   getty - if TRUE, ttymon is in getty_mode and use a different
2157c478bd9Sstevel@tonic-gate  *		       debug file
2167c478bd9Sstevel@tonic-gate  */
2177c478bd9Sstevel@tonic-gate 
2187c478bd9Sstevel@tonic-gate void
opendebug(int getty_mode)2197c478bd9Sstevel@tonic-gate opendebug(int getty_mode)
2207c478bd9Sstevel@tonic-gate {
2217c478bd9Sstevel@tonic-gate 	int  fd, ret;
2227c478bd9Sstevel@tonic-gate 	char	debugfile[BUFSIZ];
2237c478bd9Sstevel@tonic-gate 
2247c478bd9Sstevel@tonic-gate 	if (!getty_mode) {
225*3bb2c156SToomas Soome 		(void) strcpy(debugfile, LOGDIR);
226*3bb2c156SToomas Soome 		(void) strcat(debugfile, Tag);
227*3bb2c156SToomas Soome 		(void) strcat(debugfile, "/");
228*3bb2c156SToomas Soome 		(void) strcat(debugfile, DBGFILE);
2297c478bd9Sstevel@tonic-gate 		if ((Debugfp = fopen(debugfile, "a+")) == NULL)
2307c478bd9Sstevel@tonic-gate 			fatal("open debug file failed");
231*3bb2c156SToomas Soome 	} else {
2327c478bd9Sstevel@tonic-gate 		if ((fd = open(EX_DBG, O_WRONLY|O_APPEND|O_CREAT)) < 0)
2337c478bd9Sstevel@tonic-gate 			fatal("open %s failed: %s", EX_DBG, errno);
2347c478bd9Sstevel@tonic-gate 
235*3bb2c156SToomas Soome 		if (fd >= 3) {
2367c478bd9Sstevel@tonic-gate 			ret = fd;
237*3bb2c156SToomas Soome 		} else {
2387c478bd9Sstevel@tonic-gate 			if ((ret = fcntl(fd, F_DUPFD, 3)) < 0)
2397c478bd9Sstevel@tonic-gate 				fatal("F_DUPFD fcntl failed: %s",
2407c478bd9Sstevel@tonic-gate 				    strerror(errno));
2417c478bd9Sstevel@tonic-gate 
2427c478bd9Sstevel@tonic-gate 		}
2437c478bd9Sstevel@tonic-gate 		if ((Debugfp = fdopen(ret, "a+")) == NULL)
2447c478bd9Sstevel@tonic-gate 			fatal("fdopen failed: %s", strerror(errno));
2457c478bd9Sstevel@tonic-gate 
2467c478bd9Sstevel@tonic-gate 		if (ret != fd)
247*3bb2c156SToomas Soome 			(void) close(fd);
2487c478bd9Sstevel@tonic-gate 	}
2497c478bd9Sstevel@tonic-gate 	/* set close-on-exec flag */
2507c478bd9Sstevel@tonic-gate 	if (fcntl(fileno(Debugfp), F_SETFD, 1) == -1)
2517c478bd9Sstevel@tonic-gate 		fatal("F_SETFD fcntl failed: %s", strerror(errno));
2527c478bd9Sstevel@tonic-gate }
2537c478bd9Sstevel@tonic-gate 
2547c478bd9Sstevel@tonic-gate /*
2557c478bd9Sstevel@tonic-gate  * debug(msg) - put a message into debug file
2567c478bd9Sstevel@tonic-gate  */
2577c478bd9Sstevel@tonic-gate 
2587c478bd9Sstevel@tonic-gate void
debug(const char * fmt,...)2597c478bd9Sstevel@tonic-gate debug(const char *fmt, ...)
2607c478bd9Sstevel@tonic-gate {
2617c478bd9Sstevel@tonic-gate 	va_list ap;
2627c478bd9Sstevel@tonic-gate 	char *timestamp;	/* current time in readable form */
2637c478bd9Sstevel@tonic-gate 	time_t clock;		/* current time in seconds */
2647c478bd9Sstevel@tonic-gate 
2657c478bd9Sstevel@tonic-gate 	(void) time(&clock);
2667c478bd9Sstevel@tonic-gate 	timestamp = ctime(&clock);
2677c478bd9Sstevel@tonic-gate 	*(strchr(timestamp, '\n')) = '\0';
2687c478bd9Sstevel@tonic-gate 
2697c478bd9Sstevel@tonic-gate 	(void) fprintf(Debugfp, "%s; %ld; ", timestamp, getpid());
2707c478bd9Sstevel@tonic-gate 
2717c478bd9Sstevel@tonic-gate 	va_start(ap, fmt);
2727c478bd9Sstevel@tonic-gate 	(void) vfprintf(Debugfp, fmt, ap);
2737c478bd9Sstevel@tonic-gate 	va_end(ap);
2747c478bd9Sstevel@tonic-gate 
2757c478bd9Sstevel@tonic-gate 	(void) fprintf(Debugfp, "\n");
2767c478bd9Sstevel@tonic-gate 	(void) fflush(Debugfp);
2777c478bd9Sstevel@tonic-gate }
2787c478bd9Sstevel@tonic-gate #endif
279