port/gen/lfmt_log.c

/*
 * 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
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*  Copyright (c) 1988 AT&T */
/*    All Rights Reserved   */

#pragma ident   "%Z%%M% %I% %E% SMI"

/* lfmt_log() - log info */

#include "lint.h"
#include <mtlib.h>
#include <pfmt.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/types32.h>
#include <sys/stropts.h>
#include <sys/strlog.h>
#include <fcntl.h>
#include <errno.h>
#include <synch.h>
#include <thread.h>
#include "pfmt_data.h"
#include <time.h>
#include <stropts.h>
#include <unistd.h>
#include <strings.h>
#include <sys/uio.h>

#define MAXMSG  1024
#define LOGNAME     "/dev/conslog"
#define LOG_CONSOLE "/dev/console"

int
__lfmt_log(const char *text, const char *sev, va_list args, long flag, int ret)
{
    static int fd = -1;
    struct strbuf dat;
    int msg_offset;
    long len;
    union {
        long    flag;
        char    buf[MAXMSG];
    } msg;
    int err;
    int fdd;

    len = ret + sizeof (long) + 3;

    if (len > sizeof (msg)) {
        errno = ERANGE;
        return (-2);
    }

    msg.flag = flag;
    msg_offset = (int)sizeof (long);

    lrw_rdlock(&_rw_pfmt_label);
    if (*__pfmt_label)
        msg_offset += strlcpy(msg.buf + msg_offset, __pfmt_label,
            sizeof (msg.buf) - msg_offset);
    lrw_unlock(&_rw_pfmt_label);

    if (sev)
        msg_offset += sprintf(msg.buf + msg_offset, sev, flag & 0xff);

    msg_offset += 1 + vsprintf(msg.buf + msg_offset, text, args);
    msg.buf[msg_offset++] = '\0';

    if (fd == -1 &&
        ((fd = open(LOGNAME, O_WRONLY)) == -1 ||
        fcntl(fd, F_SETFD, 1) == -1))
        return (-2);

    dat.maxlen = MAXMSG;
    dat.len = (int)msg_offset;
    dat.buf = msg.buf;

    if (putmsg(fd, 0, &dat, 0) == -1) {
        (void) close(fd);
        return (-2);
    }

    /*
     *  Display it to a console
     */
    if ((flag & MM_CONSOLE) != 0) {
        char *p;
        time_t t;
        char buf[128];
        err = errno;
        fdd = open(LOG_CONSOLE, O_WRONLY);
        if (fdd != -1) {
            /*
             * Use C locale for time stamp.
             */
            (void) time(&t);
            (void) ctime_r(&t, buf, sizeof (buf));
            p = (char *)strrchr(buf, '\n');
            if (p != NULL)
                *p = ':';
            (void) write(fdd, buf, strlen(buf));
            (void) write(fdd, msg.buf + sizeof (long),
                msg_offset - sizeof (long));
            (void) write(fdd, "\n", 1);
        } else
            return (-2);
        (void) close(fdd);
        errno = err;
    }
    return (ret);
}