contrib/ntpd/log.c

   1 /*      $OpenBSD: src/usr.sbin/ntpd/log.c,v 1.7 2005/03/31 12:14:01 henning Exp $ */
   2
   3 /*
   4  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <errno.h>
  20 #include <stdarg.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <syslog.h>
  25 #include <time.h>
  26
  27 #include "ntpd.h"
  28
  29 int      debug;
  30
  31 void     logit(int, const char *, ...);
  32
  33 void
  34 log_init(int n_debug)
  35 {
  36         extern char     *__progname;
  37
  38         debug = n_debug;
  39
  40         if (!debug)
  41                 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
  42
  43         tzset();
  44 }
  45
  46 void
  47 logit(int pri, const char *fmt, ...)
  48 {
  49         va_list ap;
  50
  51         va_start(ap, fmt);
  52         vlog(pri, fmt, ap);
  53         va_end(ap);
  54 }
  55
  56 void
  57 vlog(int pri, const char *fmt, va_list ap)
  58 {
  59         char    *nfmt;
  60
  61         if (debug) {
  62                 /* best effort in out of mem situations */
  63                 if (asprintf(&nfmt, "%s\n", fmt) == -1) {
  64                         vfprintf(stderr, fmt, ap);
  65                         fprintf(stderr, "\n");
  66                 } else {
  67                         vfprintf(stderr, nfmt, ap);
  68                         free(nfmt);
  69                 }
  70                 fflush(stderr);
  71         } else
  72                 vsyslog(pri, fmt, ap);
  73 }
  74
  75
  76 void
  77 log_warn(const char *emsg, ...)
  78 {
  79         char    *nfmt;
  80         va_list  ap;
  81
  82         /* best effort to even work in out of memory situations */
  83         if (emsg == NULL)
  84                 logit(LOG_CRIT, "%s", strerror(errno));
  85         else {
  86                 va_start(ap, emsg);
  87
  88                 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
  89                         /* we tried it... */
  90                         vlog(LOG_CRIT, emsg, ap);
  91                         logit(LOG_CRIT, "%s", strerror(errno));
  92                 } else {
  93                         vlog(LOG_CRIT, nfmt, ap);
  94                         free(nfmt);
  95                 }
  96                 va_end(ap);
  97         }
  98 }
  99
 100 void
 101 log_warnx(const char *emsg, ...)
 102 {
 103         va_list  ap;
 104
 105         va_start(ap, emsg);
 106         vlog(LOG_CRIT, emsg, ap);
 107         va_end(ap);
 108 }
 109
 110 void
 111 log_info(const char *emsg, ...)
 112 {
 113         va_list  ap;
 114
 115         va_start(ap, emsg);
 116         vlog(LOG_INFO, emsg, ap);
 117         va_end(ap);
 118 }
 119
 120 void
 121 log_debug(const char *emsg, ...)
 122 {
 123         va_list  ap;
 124
 125         if (debug) {
 126                 va_start(ap, emsg);
 127                 vlog(LOG_DEBUG, emsg, ap);
 128                 va_end(ap);
 129         }
 130 }
 131
 132 void
 133 fatal(const char *emsg)
 134 {
 135         if (emsg == NULL)
 136                 logit(LOG_CRIT, "fatal: %s", strerror(errno));
 137         else
 138                 if (errno)
 139                         logit(LOG_CRIT, "fatal: %s: %s",
 140                             emsg, strerror(errno));
 141                 else
 142                         logit(LOG_CRIT, "fatal: %s", emsg);
 143
 144         exit(1);
 145 }
 146
 147 void
 148 fatalx(const char *emsg)
 149 {
 150         errno = 0;
 151         fatal(emsg);
 152 }
 153
 154 const char *
 155 log_sockaddr(struct sockaddr *sa)
 156 {
 157         static char     buf[NI_MAXHOST];
 158
 159         if (getnameinfo(sa, SA_LEN(sa), buf, sizeof(buf), NULL, 0,
 160             NI_NUMERICHOST))
 161                 return ("(unknown)");
 162         else
 163                 return (buf);
 164 }