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-rw-r--r--plugins/imsolaris/sun_cddl.c419
1 files changed, 419 insertions, 0 deletions
diff --git a/plugins/imsolaris/sun_cddl.c b/plugins/imsolaris/sun_cddl.c
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+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/* Portions Copyright 2010 by Rainer Gerhards and Adiscon
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+/*
+ * Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
+ * All Rights Reserved
+ */
+
+/*
+ * University Copyright- Copyright (c) 1982, 1986, 1988
+ * The Regents of the University of California
+ * All Rights Reserved
+ *
+ * University Acknowledgment- Portions of this document are derived from
+ * software developed by the University of California, Berkeley, and its
+ * contributors.
+ */
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <stropts.h>
+#include <assert.h>
+
+#include <sys/param.h>
+#include <sys/strlog.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/poll.h>
+#include <door.h>
+#include <sys/door.h>
+
+#include "rsyslog.h"
+#include "srUtils.h"
+#include "debug.h"
+#include "imsolaris.h"
+
+#define DOORFILE "/var/run/syslog_door"
+#define RELATIVE_DOORFILE "../var/run/syslog_door"
+#define OLD_DOORFILE "/etc/.syslog_door"
+
+/* Buffer to allocate for error messages: */
+#define ERRMSG_LEN 1024
+
+/* Max number of door server threads for syslogd. Since door is used
+ * to check the health of syslogd, we don't need large number of
+ * server threads.
+ */
+#define MAX_DOOR_SERVER_THR 3
+
+
+struct pollfd sun_Pfd; /* Pollfd for local log device */
+
+static int DoorFd = -1;
+static int DoorCreated = 0;
+static char *DoorFileName = DOORFILE;
+
+/* for managing door server threads */
+static pthread_mutex_t door_server_cnt_lock = PTHREAD_MUTEX_INITIALIZER;
+static uint_t door_server_cnt = 0;
+static pthread_attr_t door_thr_attr;
+
+/* the 'server' function that we export via the door. It does
+ * nothing but return.
+ */
+/*ARGSUSED*/
+static void
+server( void __attribute__((unused)) *cookie,
+ char __attribute__((unused)) *argp,
+ size_t __attribute__((unused)) arg_size,
+ door_desc_t __attribute__((unused)) *dp,
+ __attribute__((unused)) uint_t n )
+{
+ (void) door_return(NULL, 0, NULL, 0);
+ /* NOTREACHED */
+}
+
+/*ARGSUSED*/
+static void *
+create_door_thr(void __attribute__((unused)) *arg)
+{
+ (void) pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
+ (void) door_return(NULL, 0, NULL, 0);
+
+ /* If there is an error in door_return(), it will return here and
+ * the thread will exit. Hence we need to decrement door_server_cnt.
+ */
+ (void) pthread_mutex_lock(&door_server_cnt_lock);
+ door_server_cnt--;
+ (void) pthread_mutex_unlock(&door_server_cnt_lock);
+ return (NULL);
+}
+
+/*
+ * Manage door server thread pool.
+ */
+/*ARGSUSED*/
+static void
+door_server_pool(door_info_t __attribute__((unused)) *dip)
+{
+ (void) pthread_mutex_lock(&door_server_cnt_lock);
+ if (door_server_cnt <= MAX_DOOR_SERVER_THR &&
+ pthread_create(NULL, &door_thr_attr, create_door_thr, NULL) == 0) {
+ door_server_cnt++;
+ (void) pthread_mutex_unlock(&door_server_cnt_lock);
+ return;
+ }
+
+ (void) pthread_mutex_unlock(&door_server_cnt_lock);
+}
+
+void
+sun_delete_doorfiles(void)
+{
+ struct stat sb;
+ int err;
+ char line[ERRMSG_LEN+1];
+
+ if (lstat(DoorFileName, &sb) == 0 && !S_ISDIR(sb.st_mode)) {
+ if (unlink(DoorFileName) < 0) {
+ err = errno;
+ (void) snprintf(line, sizeof (line),
+ "unlink() of %s failed - fatal", DoorFileName);
+ imsolaris_logerror(err, line);
+ DBGPRINTF("delete_doorfiles: error: %s, "
+ "errno=%d\n", line, err);
+ exit(1);
+ }
+
+ DBGPRINTF("delete_doorfiles: deleted %s\n", DoorFileName);
+ }
+
+ if (strcmp(DoorFileName, DOORFILE) == 0) {
+ if (lstat(OLD_DOORFILE, &sb) == 0 && !S_ISDIR(sb.st_mode)) {
+ if (unlink(OLD_DOORFILE) < 0) {
+ err = errno;
+ (void) snprintf(line, sizeof (line),
+ "unlink() of %s failed", OLD_DOORFILE);
+ DBGPRINTF("delete_doorfiles: %s\n", line);
+
+ if (err != EROFS) {
+ errno = err;
+ (void) strlcat(line, " - fatal",
+ sizeof (line));
+ imsolaris_logerror(err, line);
+ DBGPRINTF("delete_doorfiles: "
+ "error: %s, errno=%d\n",
+ line, err);
+ exit(1);
+ }
+
+ DBGPRINTF("delete_doorfiles: unlink() "
+ "failure OK on RO file system\n");
+ }
+
+ DBGPRINTF("delete_doorfiles: deleted %s\n",
+ OLD_DOORFILE);
+ }
+ }
+
+ if (DoorFd != -1) {
+ (void) door_revoke(DoorFd);
+ }
+
+ DBGPRINTF("delete_doorfiles: revoked door: DoorFd=%d\n",
+ DoorFd);
+}
+
+
+/* Create the door file. If the filesystem
+ * containing /etc is writable, create symlinks /etc/.syslog_door
+ * to them. On systems that do not support /var/run, create
+ * /etc/.syslog_door directly.
+ */
+void
+sun_open_door(void)
+{
+ struct stat buf;
+ door_info_t info;
+ char line[ERRMSG_LEN+1];
+ int err;
+
+ /* first see if another instance of imsolaris OR another
+ * syslogd is running by trying a door call - if it succeeds,
+ * there is already one active.
+ */
+
+ if (!DoorCreated) {
+ int door;
+
+ if ((door = open(DoorFileName, O_RDONLY)) >= 0) {
+ DBGPRINTF("open_door: %s opened "
+ "successfully\n", DoorFileName);
+
+ if (door_info(door, &info) >= 0) {
+ DBGPRINTF("open_door: "
+ "door_info:info.di_target = %ld\n",
+ info.di_target);
+
+ if (info.di_target > 0) {
+ (void) sprintf(line, "syslogd pid %ld"
+ " already running. Cannot "
+ "start another syslogd pid %ld",
+ info.di_target, getpid());
+ DBGPRINTF("open_door: error: "
+ "%s\n", line);
+ imsolaris_logerror(0, line);
+ exit(1);
+ }
+ }
+
+ (void) close(door);
+ } else {
+ if (lstat(DoorFileName, &buf) < 0) {
+ err = errno;
+
+ DBGPRINTF("open_door: lstat() of %s "
+ "failed, errno=%d\n",
+ DoorFileName, err);
+
+ if ((door = creat(DoorFileName, 0644)) < 0) {
+ err = errno;
+ (void) snprintf(line, sizeof (line),
+ "creat() of %s failed - fatal",
+ DoorFileName);
+ DBGPRINTF("open_door: error: %s, "
+ "errno=%d\n", line,
+ err);
+ imsolaris_logerror(err, line);
+ sun_delete_doorfiles();
+ exit(1);
+ }
+
+ (void) fchmod(door,
+ S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+
+ DBGPRINTF("open_door: creat() of %s "
+ "succeeded\n",
+ DoorFileName);
+
+ (void) close(door);
+ }
+ }
+
+ if (strcmp(DoorFileName, DOORFILE) == 0) {
+ if (lstat(OLD_DOORFILE, &buf) == 0) {
+ DBGPRINTF("open_door: lstat() of %s "
+ "succeeded\n", OLD_DOORFILE);
+
+ if (S_ISDIR(buf.st_mode)) {
+ (void) snprintf(line, sizeof (line),
+ "%s is a directory - fatal",
+ OLD_DOORFILE);
+ DBGPRINTF("open_door: error: "
+ "%s\n", line);
+ imsolaris_logerror(0, line);
+ sun_delete_doorfiles();
+ exit(1);
+ }
+
+ DBGPRINTF("open_door: %s is not a "
+ "directory\n", OLD_DOORFILE);
+ if (unlink(OLD_DOORFILE) < 0) {
+ err = errno;
+ (void) snprintf(line, sizeof (line),
+ "unlink() of %s failed",
+ OLD_DOORFILE);
+ DBGPRINTF("open_door: %s\n",
+ line);
+
+ if (err != EROFS) {
+ DBGPRINTF("open_door: "
+ "error: %s, "
+ "errno=%d\n",
+ line, err);
+ (void) strcat(line, " - fatal");
+ imsolaris_logerror(err, line);
+ sun_delete_doorfiles();
+ exit(1);
+ }
+
+ DBGPRINTF("open_door: unlink "
+ "failure OK on RO file "
+ "system\n");
+ }
+ } else {
+ DBGPRINTF("open_door: file %s doesn't "
+ "exist\n", OLD_DOORFILE);
+ }
+
+ if (symlink(RELATIVE_DOORFILE, OLD_DOORFILE) < 0) {
+ err = errno;
+ (void) snprintf(line, sizeof (line),
+ "symlink %s -> %s failed", OLD_DOORFILE,
+ RELATIVE_DOORFILE);
+ DBGPRINTF("open_door: %s\n",
+ line);
+
+ if (err != EROFS) {
+ DBGPRINTF("open_door: error: %s, "
+ "errno=%d\n", line,
+ err);
+ (void) strcat(line, " - fatal");
+ imsolaris_logerror(err, line);
+ sun_delete_doorfiles();
+ exit(1);
+ }
+
+ DBGPRINTF("open_door: symlink failure OK "
+ "on RO file system\n");
+ } else {
+ DBGPRINTF("open_door: symlink %s -> %s "
+ "succeeded\n",
+ OLD_DOORFILE, RELATIVE_DOORFILE);
+ }
+ }
+
+ if ((DoorFd = door_create(server, 0,
+ DOOR_REFUSE_DESC)) < 0) {
+ //???? DOOR_NO_CANEL requires newer libs??? DOOR_REFUSE_DESC | DOOR_NO_CANCEL)) < 0) {
+ err = errno;
+ (void) sprintf(line, "door_create() failed - fatal");
+ DBGPRINTF("open_door: error: %s, errno=%d\n",
+ line, err);
+ imsolaris_logerror(err, line);
+ sun_delete_doorfiles();
+ exit(1);
+ }
+ //???? (void) door_setparam(DoorFd, DOOR_PARAM_DATA_MAX, 0);
+ DBGPRINTF("open_door: door_create() succeeded, "
+ "DoorFd=%d\n", DoorFd);
+
+ DoorCreated = 1;
+ }
+
+ (void) fdetach(DoorFileName); /* just in case... */
+
+ (void) door_server_create(door_server_pool);
+
+ if (fattach(DoorFd, DoorFileName) < 0) {
+ err = errno;
+ (void) snprintf(line, sizeof (line), "fattach() of fd"
+ " %d to %s failed - fatal", DoorFd, DoorFileName);
+ DBGPRINTF("open_door: error: %s, errno=%d\n",
+ line, err);
+ imsolaris_logerror(err, line);
+ sun_delete_doorfiles();
+ exit(1);
+ }
+
+ DBGPRINTF("open_door: attached server() to %s\n",
+ DoorFileName);
+
+}
+
+
+/* Attempts to open the local log device
+ * and return a file descriptor.
+ */
+rsRetVal
+sun_openklog(char *name)
+{
+ DEFiRet;
+ int fd;
+ struct strioctl str;
+ char errBuf[1024];
+
+ if((fd = open(name, O_RDONLY)) < 0) {
+ rs_strerror_r(errno, errBuf, sizeof(errBuf));
+ DBGPRINTF("imsolaris:openklog: cannot open %s: %s\n",
+ name, errBuf);
+ ABORT_FINALIZE(RS_RET_ERR_OPEN_KLOG);
+ }
+ str.ic_cmd = I_CONSLOG;
+ str.ic_timout = 0;
+ str.ic_len = 0;
+ str.ic_dp = NULL;
+ if (ioctl(fd, I_STR, &str) < 0) {
+ rs_strerror_r(errno, errBuf, sizeof(errBuf));
+ DBGPRINTF("imsolaris:openklog: cannot register to log "
+ "console messages: %s\n", errBuf);
+ ABORT_FINALIZE(RS_RET_ERR_AQ_CONLOG);
+ }
+ sun_Pfd.fd = fd;
+ sun_Pfd.events = POLLIN;
+ DBGPRINTF("imsolaris/openklog: opened '%s' as fd %d.\n", name, fd);
+
+finalize_it:
+ RETiRet;
+}