ndmpd/ndmp/ndmpd_log.c

2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Use is subject to license terms.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * BSD 3 Clause License
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Copyright (c) 2007, The Storage Networking Industry Association.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Redistribution and use in source and binary forms, with or without
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * modification, are permitted provided that the following conditions
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * are met:
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *  - Redistributions of source code must retain the above copyright
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *    notice, this list of conditions and the following disclaimer.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *  - Redistributions in binary form must reproduce the above copyright
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *    notice, this list of conditions and the following disclaimer in
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *    the documentation and/or other materials provided with the
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *    distribution.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *  - Neither the name of The Storage Networking Industry Association (SNIA)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *    nor the names of its contributors may be used to endorse or promote
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *    products derived from this software without specific prior written
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *    permission.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * POSSIBILITY OF SUCH DAMAGE.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/* Copyright (c) 2007, The Storage Networking Industry Association. */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/* Copyright (c) 1996, 1997 PDC, Network Appliance. All Rights Reserved */
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl/*
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <errno.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <limits.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <stdarg.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <stdio.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <stdlib.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <syslog.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <time.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <string.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <sys/stat.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <unistd.h>
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar#include <libgen.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <pthread.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include <errno.h>
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include "ndmpd_log.h"
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include "ndmpd.h"
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#include "ndmpd_common.h"
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl#define LOG_PATH    "/var/log/ndmp"
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#define LOG_FNAME   "ndmplog.%d"
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#define LOG_FILE_CNT    5
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#define LOG_FILE_SIZE   4 * 1024 * 1024
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar#define LOG_SIZE_INT    256
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
faac71c002f7c7a98741f991b25937b24f309df0Jan Krylstatic boolean_t debug = B_FALSE;
faac71c002f7c7a98741f991b25937b24f309df0Jan Krylstatic boolean_t log_to_stderr = B_FALSE;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarstatic FILE *logfp;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarstatic int ndmp_synclog = 1;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Since we use buffered file I/O for log file, the thread may lose CPU.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * At this time, another thread can destroy the contents of the buffer
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * that must be written to the log file.  The following mutex is used
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * to allow only one thread to write into the log file.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
faac71c002f7c7a98741f991b25937b24f309df0Jan Krylstatic mutex_t log_lock;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarstatic char *priority_str[] = {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    "EMERGENCY",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    "ALERT",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    "CRITICAL",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    "ERROR",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    "WARNING",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    "NOTICE",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    "INFO",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    "DEBUG",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar};
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * mk_pathname
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Append the NDMP working directory path to the specified file
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarstatic char *
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdarmk_pathname(char *fname, char *path, int idx)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar{
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    static char buf[PATH_MAX];
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    static char name[NAME_MAX];
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar    char *fmt;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    int len;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    len = strnlen(path, PATH_MAX);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    fmt = (path[len - 1] == '/') ? "%s%s" : "%s/%s";
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    /* LINTED variable format specifier */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) snprintf(name, NAME_MAX, fname, idx);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    /* LINTED variable format specifier */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) snprintf(buf, PATH_MAX, fmt, path, name);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    return (buf);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar}
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * openlogfile
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Open the NDMP log file
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarstatic int
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdaropenlogfile(char *fname, char *mode)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar{
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    assert(fname != NULL && *fname != '\0' &&
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl        mode != NULL && *mode != '\0');
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    if ((logfp = fopen(fname, mode)) == NULL) {
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl        perror("Error opening logfile");
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        return (-1);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    }
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    (void) mutex_init(&log_lock, 0, NULL);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    return (0);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar}
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * log_write_cur_time
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Add the current time for each log entry
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarstatic void
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarlog_write_cur_time(void)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar{
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    struct tm tm;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    time_t secs;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    secs = time(NULL);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) localtime_r(&secs, &tm);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) fprintf(logfp, "%2d/%02d %2d:%02d:%02d ",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        tm.tm_mon + 1, tm.tm_mday,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        tm.tm_hour, tm.tm_min, tm.tm_sec);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar}
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * add_newline
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * The new line at the end of each log
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarstatic void
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdaradd_newline(char *fmt)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar{
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    if (fmt[strlen(fmt) - 1] != '\n')
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        (void) fputc('\n', logfp);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar}
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * log_append
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Append the message to the end of the log
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarstatic void
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarlog_append(char *msg)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar{
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    log_write_cur_time();
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) fwrite(msg, 1, strlen(msg), logfp);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    add_newline(msg);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    if (ndmp_synclog)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        (void) fflush(logfp);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar}
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * ndmp_log_openfile
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl * Open the log file either for append or write mode. This function should
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl * be called while ndmpd is still running single-threaded and in foreground.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarint
faac71c002f7c7a98741f991b25937b24f309df0Jan Krylndmp_log_open_file(boolean_t to_stderr, boolean_t override_debug)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar{
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    char *fname, *mode, *lpath;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    char oldfname[PATH_MAX];
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar    struct stat64 st;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    int i;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    log_to_stderr = to_stderr;
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    /* read debug property if it isn't overriden by cmd line option */
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    if (override_debug)
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl        debug = B_TRUE;
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    else
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl        debug = ndmpd_get_prop_yorn(NDMP_DEBUG_MODE) ? B_TRUE : B_FALSE;
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    /* Create the debug path if it doesn't exist */
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar    lpath = ndmpd_get_prop(NDMP_DEBUG_PATH);
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar    if ((lpath == NULL) || (*lpath == NULL))
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl        lpath = LOG_PATH;
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar    if (stat64(lpath, &st) < 0) {
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar        if (mkdirp(lpath, 0755) < 0) {
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl            (void) fprintf(stderr,
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl                "Could not create log path %s: %s\n",
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl                lpath, strerror(errno));
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar            lpath = "/var";
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar        }
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar    }
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    /*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     * NDMP log file name will be {logfilename}.0 to {logfilename}.5, where
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     * {logfilename}.0 will always be the latest and the {logfilename}.5
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     * will be the oldest available file on the system. We keep maximum of 5
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     * log files. With the new session the files are shifted to next number
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     * and if the last file {logfilename}.5 exist, it will be overwritten
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     * with {logfilename}.4.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     */
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    if (debug) {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        i = LOG_FILE_CNT - 1;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        while (i >= 0) {
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar            fname = mk_pathname(LOG_FNAME, lpath, i);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            (void) strncpy(oldfname, fname, PATH_MAX);
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar            if (stat64(oldfname, &st) == -1) {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                i--;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                continue;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar            fname = mk_pathname(LOG_FNAME, lpath, i + 1);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            if (rename(oldfname, fname))
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl                (void) fprintf(stderr,
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl                    "Could not rename %s to %s: %s\n",
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl                    oldfname, fname, strerror(errno));
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            i--;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
86c48bbfeb72d5a6ee171e713059939bab658b77Reza Sabdar    fname = mk_pathname(LOG_FNAME, lpath, 0);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    /*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     * Append only if debug is not enable.
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar     */
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    if (debug)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        mode = "w";
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    else
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        mode = "a";
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    return (openlogfile(fname, mode));
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar}
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar/*
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * ndmp_log_close_file
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar *
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar * Close the log file
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarvoid
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarndmp_log_close_file(void)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar{
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    if (logfp != NULL) {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        (void) fclose(logfp);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        logfp = NULL;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    }
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    (void) mutex_destroy(&log_lock);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar}
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarvoid
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdarndmp_log(ulong_t priority, char *ndmp_log_info, char *fmt, ...)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar{
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    int c;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    va_list args;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    char *f, *b;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    char ndmp_log_buf[PATH_MAX+KILOBYTE];
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    char ndmp_syslog_buf[PATH_MAX+KILOBYTE];
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    char buf[PATH_MAX+KILOBYTE];
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    char *errstr;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    if ((priority == LOG_DEBUG) && !debug)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        return;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) mutex_lock(&log_lock);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    if (priority > 7)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        priority = LOG_ERR;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    va_start(args, fmt);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    /* Replace text error messages if fmt contains %m */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    b = buf;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    f = fmt;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    while (((c = *f++) != '\0') && (c != '\n') &&
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        (b < &buf[PATH_MAX+KILOBYTE])) {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        if (c != '%') {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            *b++ = c;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            continue;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        if ((c = *f++) != 'm') {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            *b++ = '%';
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            *b++ = c;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            continue;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        if ((errstr = strerror(errno)) == NULL) {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            (void) snprintf(b, &buf[PATH_MAX+KILOBYTE] - b,
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                "error %d", errno);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        } else {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            while ((*errstr != '\0') &&
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                (b < &buf[PATH_MAX+KILOBYTE])) {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                if (*errstr == '%') {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                    (void) strncpy(b, "%%", 2);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                    b += 2;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                } else {
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                    *b++ = *errstr;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar                errstr++;
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar            *b = '\0';
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        b += strlen(b);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    }
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    *b = '\0';
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    /* LINTED variable format specifier */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) vsnprintf(ndmp_syslog_buf, sizeof (ndmp_syslog_buf), buf, args);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    va_end(args);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    /* Send all logs other than debug, to syslog log file. */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    if (priority != LOG_DEBUG)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        syslog(priority, "%s", ndmp_syslog_buf);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    /* ndmp_log_buf will have priority string and log info also */
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) snprintf(ndmp_log_buf, sizeof (ndmp_log_buf), "%s: %s:%s",
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        priority_str[priority], ndmp_log_info, ndmp_syslog_buf);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    if (logfp != NULL)
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar        log_append(ndmp_log_buf);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    /* if ndmpd is running in foreground print log message to stderr */
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl    if (log_to_stderr)
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl        (void) fprintf(stderr, "%s\n", ndmp_log_buf);
faac71c002f7c7a98741f991b25937b24f309df0Jan Kryl
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar    (void) mutex_unlock(&log_lock);
2654012f83cec5dc15b61dfe3e4a4915f186e7a6Reza Sabdar}