usr.bin/tip/log.c

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#)log.c    8.1 (Berkeley) 6/6/93
  30  * $FreeBSD: src/usr.bin/tip/tip/log.c,v 1.4 1999/08/28 01:06:34 peter Exp $
  31  */
  32
  33 #include "tip.h"
  34 #include <err.h>
  35
  36 static  FILE *flog = NULL;
  37
  38 /*
  39  * Log file maintenance routines
  40  */
  41
  42 void
  43 logent(char *group, char *num, char *acu, char *message)
  44 {
  45         char *user, *timestamp;
  46         struct passwd *pwd;
  47         time_t t;
  48
  49         if (flog == NULL)
  50                 return;
  51         if (flock(fileno(flog), LOCK_EX) < 0) {
  52                 warn("flock");
  53                 return;
  54         }
  55         if ((user = getlogin()) == NULL) {
  56                 if ((pwd = getpwuid(getuid())) == NULL)
  57                         user = "???";
  58                 else
  59                         user = pwd->pw_name;
  60         }
  61         t = time(0);
  62         timestamp = ctime(&t);
  63         timestamp[24] = '\0';
  64         fprintf(flog, "%s (%s) <%s, %s, %s> %s\n",
  65                 user, timestamp, group, "", acu, message);
  66         (void) fflush(flog);
  67         (void) flock(fileno(flog), LOCK_UN);
  68 }
  69
  70 void
  71 loginit(void)
  72 {
  73         flog = fopen(value(LOG), "a");
  74         if (flog == NULL)
  75                 fprintf(stderr, "can't open log file %s.\r\n", value(LOG));
  76 }