smbsrv/smbd/smbd_syslog.c

b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/*
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * This file and its contents are supplied under the terms of the
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * Common Development and Distribution License ("CDDL"), version 1.0.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * You may only use this file in accordance with the terms of version
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * 1.0 of the CDDL.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross *
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * A full copy of the text of the CDDL should have accompanied this
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * source.  A copy of the CDDL is also available via the Internet at
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * http://www.illumos.org/license/CDDL.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/*
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * Copyright 2014 Nexenta Systems, Inc.  All rights reserved.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <stdio.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <stdarg.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <errno.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <string.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <syslog.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <smbsrv/smbinfo.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <smbsrv/smb_ioctl.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include "smbd.h"
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#define CBUFSIZ 26  /* ctime(3c) */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossstatic const char *pri_name[LOG_DEBUG+1] = {
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    "emerg", "alert", "crit", "err", "warning", "notice", "info", "debug"
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross};
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossstatic void
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rosssmb_svc_log(int pri, const char *fmt, va_list ap)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    static time_t prev_ts;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    char fbuf[SMBD_LOG_MSGSIZE];
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    char cbuf[CBUFSIZ];
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    char *newfmt;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    time_t ts;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    int save_errno = errno;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    pri &= LOG_PRIMASK;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    if (smbd.s_debug == 0 && pri == LOG_DEBUG)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross        return;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    ts = time(NULL);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    if (prev_ts != ts) {
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross        prev_ts = ts;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross        /* NB: cbuf has \n */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross        (void) fprintf(stdout, "@ %s",
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross            ctime_r(&ts, cbuf, sizeof (cbuf)));
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    }
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    newfmt = smb_syslog_fmt_m(fbuf, sizeof (fbuf), fmt, save_errno);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    flockfile(stdout);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    (void) fprintf(stdout, "smbd.%s: ", pri_name[pri]);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    /* LINTED E_SEC_PRINTF_VAR_FMT */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    (void) vfprintf(stdout, newfmt, ap);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    (void) fprintf(stdout, "\n");
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    funlockfile(stdout);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    (void) fflush(stdout);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/*
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * Provide a replacement for libsmb:smb_vsyslog() that prints messages
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * both to the normal sysloc(3c), and to stdout, which ends up in:
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross *  /var/svc/log/network-smb-server:default.log
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * It's much easier to follow debug messages in the service log.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossvoid
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rosssmb_vsyslog(int pri, const char *fmt, va_list ap)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    va_list tap;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    va_copy(tap, ap);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    smb_svc_log(pri, fmt, tap);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    va_end(tap);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    vsyslog(pri, fmt, ap);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/*
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * An override for libsmb:smb_trace().  As the comment there says:
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross *
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * This function is designed to be used with dtrace, i.e. see:
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * usr/src/cmd/smbsrv/dtrace/smbd-all.d
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross *
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * Outside of dtrace, the messages passed to this function usually
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * lack sufficient context to be useful, so don't log them.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * However, if you insist, set debug >= 3 and this will log them.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossvoid
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rosssmb_trace(const char *s)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross    if (smbd.s_debug >= 3)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross        (void) fprintf(stdout, "smbd.trace: %s\n", s);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}