usr.sbin/dntpd/log.c

   1 /*
   2  * Copyright (c) 2005 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/usr.sbin/dntpd/log.c,v 1.5 2007/06/26 00:40:35 dillon Exp $
  35  */
  36
  37 #include "defs.h"
  38
  39 static void vlogline(int level, int newline, const char *ctl, va_list va)
  40                 __printflike(3, 0);
  41
  42 int log_stderr = 1;
  43
  44 void
  45 logerr(const char *ctl, ...)
  46 {
  47     int saved_errno;
  48     va_list va;
  49
  50     saved_errno = errno;
  51     va_start(va, ctl);
  52     vlogline(0, 0, ctl, va);
  53     logerrstr(": %s", strerror(saved_errno));
  54     va_end(va);
  55
  56 }
  57
  58 void
  59 logerrstr(const char *ctl, ...)
  60 {
  61     va_list va;
  62
  63     va_start(va, ctl);
  64     vlogline(0, 1, ctl, va);
  65     va_end(va);
  66 }
  67
  68 /*
  69  * logdebug() does not add the '\n', allowing multiple calls to generate
  70  * a debugging log line.  The buffer is accumulated until a newline is
  71  * detected, then syslogged.
  72  */
  73 void
  74 _logdebug(int level, const char *ctl, ...)
  75 {
  76     va_list va;
  77
  78     if (level <= debug_level) {
  79         va_start(va, ctl);
  80         vlogline(level, 0, ctl, va);
  81         va_end(va);
  82     }
  83 }
  84
  85 void
  86 _logdebuginfo(server_info_t info, int level, const char *ctl, ...)
  87 {
  88     va_list va;
  89     char *str = NULL;
  90     int ipstrpad;
  91
  92     if (level <= debug_level) {
  93         va_start(va, ctl);
  94
  95         vasprintf(&str, ctl, va);
  96         if (str) {
  97             if (info->ipstr == NULL || strcmp(info->target, info->ipstr) == 0) {
  98                 _logdebug(level, "%s: %s", info->target, str);
  99             } else {
 100                 if ((ipstrpad = 15 - strlen(info->ipstr)) < 0)
 101                         ipstrpad = 0;
 102                 _logdebug(level, "%s %*.*s(%s): %s", info->target,
 103                           ipstrpad, ipstrpad, "",
 104                           info->ipstr, str);
 105             }
 106             free(str);
 107         }
 108         va_end(va);
 109     }
 110 }
 111
 112 static void
 113 vlogline(int level, int newline, const char *ctl, va_list va)
 114 {
 115     static char line_build[1024];
 116     static int line_index;
 117     int priority;
 118     va_list vacopy;
 119
 120     /*
 121      * Output to stderr directly but build the log line for syslog.
 122      */
 123     if (level <= debug_level) {
 124         va_copy(vacopy, va);
 125         if (log_stderr) {
 126             vfprintf(stderr, ctl, va);
 127             if (newline)
 128                 fprintf(stderr, "\n");
 129             fflush(stderr);
 130         }
 131         if (debug_opt == 0) {
 132             vsnprintf(line_build + line_index, sizeof(line_build) - line_index,
 133                     ctl, vacopy);
 134             line_index += strlen(line_build + line_index);
 135             if (line_index && line_build[line_index-1] == '\n') {
 136                 newline = 1;
 137                 --line_index;
 138             }
 139             if (newline) {
 140                 switch(level) {
 141                 case 0:
 142                 case 1:
 143                 case 2:
 144                     priority = LOG_NOTICE;
 145                     break;
 146                 case 3:
 147                     priority = LOG_INFO;
 148                     break;
 149                 default:
 150                     priority = LOG_DEBUG;
 151                     break;
 152                 }
 153                 syslog(priority, "%*.*s", line_index, line_index, line_build);
 154                 line_index = 0;
 155             }
 156         }
 157         va_end(vacopy);
 158     }
 159 }
 160