usr.sbin/sendmail/src/stats.c

/*
 * Copyright (c) 1983 Eric P. Allman
 * Copyright (c) 1988, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)stats.c     8.2 (Berkeley) 7/11/93";
#endif /* not lint */

# include "sendmail.h"
# include "mailstats.h"

struct statistics       Stat;

bool    GotStats = FALSE;       /* set when we have stats to merge */

#define ONE_K           1000            /* one thousand (twenty-four?) */
#define KBYTES(x)       (((x) + (ONE_K - 1)) / ONE_K)
\f/*
**  MARKSTATS -- mark statistics
*/

markstats(e, to)
        register ENVELOPE *e;
        register ADDRESS *to;
{
        if (to == NULL)
        {
                if (e->e_from.q_mailer != NULL)
                {
                        Stat.stat_nf[e->e_from.q_mailer->m_mno]++;
                        Stat.stat_bf[e->e_from.q_mailer->m_mno] +=
                                KBYTES(e->e_msgsize);
                }
        }
        else
        {
                Stat.stat_nt[to->q_mailer->m_mno]++;
                Stat.stat_bt[to->q_mailer->m_mno] += KBYTES(e->e_msgsize);
        }
        GotStats = TRUE;
}
\f/*
**  POSTSTATS -- post statistics in the statistics file
**
**      Parameters:
**              sfile -- the name of the statistics file.
**
**      Returns:
**              none.
**
**      Side Effects:
**              merges the Stat structure with the sfile file.
*/

poststats(sfile)
        char *sfile;
{
        register int fd;
        struct statistics stat;
        extern off_t lseek();

        if (sfile == NULL || !GotStats)
                return;

        (void) time(&Stat.stat_itime);
        Stat.stat_size = sizeof Stat;

        fd = open(sfile, 2);
        if (fd < 0)
        {
                errno = 0;
                return;
        }
        if (read(fd, (char *) &stat, sizeof stat) == sizeof stat &&
            stat.stat_size == sizeof stat)
        {
                /* merge current statistics into statfile */
                register int i;

                for (i = 0; i < MAXMAILERS; i++)
                {
                        stat.stat_nf[i] += Stat.stat_nf[i];
                        stat.stat_bf[i] += Stat.stat_bf[i];
                        stat.stat_nt[i] += Stat.stat_nt[i];
                        stat.stat_bt[i] += Stat.stat_bt[i];
                }
        }
        else
                bcopy((char *) &Stat, (char *) &stat, sizeof stat);

        /* write out results */
        (void) lseek(fd, (off_t) 0, 0);
        (void) write(fd, (char *) &stat, sizeof stat);
        (void) close(fd);

        /* clear the structure to avoid future disappointment */
        bzero(&Stat, sizeof stat);
        GotStats = FALSE;
}