usr.sbin/npppd/npppd/log.c

   1 /*      $OpenBSD: log.c,v 1.2 2012/11/13 17:10:40 yasuoka 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 <sys/types.h>
  20 #include <sys/socket.h>
  21 #include <netinet/in.h>
  22
  23 #include <errno.h>
  24 #include <netdb.h>
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <syslog.h>
  30 #include <time.h>
  31
  32 #include "debugutil.h"
  33 #include "log.h"
  34
  35 int      debug;
  36 extern int debugsyslog;
  37
  38 void     logit(int, const char *, ...);
  39
  40 void
  41 log_init(int n_debug)
  42 {
  43         extern char     *__progname;
  44
  45         debug = n_debug;
  46
  47         if (!debug)
  48                 openlog(__progname, LOG_PID | LOG_NDELAY, LOG_DAEMON);
  49
  50         tzset();
  51 }
  52
  53 void
  54 logit(int pri, const char *fmt, ...)
  55 {
  56         va_list ap;
  57
  58         va_start(ap, fmt);
  59         vlog(pri, fmt, ap);
  60         va_end(ap);
  61 }
  62
  63 void
  64 vlog(int pri, const char *fmt, va_list ap)
  65 {
  66         vlog_printf(pri, fmt, ap);
  67 }
  68
  69
  70 void
  71 log_warn(const char *emsg, ...)
  72 {
  73         char    *nfmt;
  74         va_list  ap;
  75
  76         /* best effort to even work in out of memory situations */
  77         if (emsg == NULL)
  78                 logit(LOG_CRIT, "%s", strerror(errno));
  79         else {
  80                 va_start(ap, emsg);
  81
  82                 if (asprintf(&nfmt, "%s: %s", emsg, strerror(errno)) == -1) {
  83                         /* we tried it... */
  84                         vlog(LOG_CRIT, emsg, ap);
  85                         logit(LOG_CRIT, "%s", strerror(errno));
  86                 } else {
  87                         vlog(LOG_CRIT, nfmt, ap);
  88                         free(nfmt);
  89                 }
  90                 va_end(ap);
  91         }
  92 }
  93
  94 void
  95 log_warnx(const char *emsg, ...)
  96 {
  97         va_list  ap;
  98
  99         va_start(ap, emsg);
 100         vlog(LOG_CRIT, emsg, ap);
 101         va_end(ap);
 102 }
 103
 104 void
 105 log_info(const char *emsg, ...)
 106 {
 107         va_list  ap;
 108
 109         va_start(ap, emsg);
 110         vlog(LOG_INFO, emsg, ap);
 111         va_end(ap);
 112 }
 113
 114 void
 115 log_debug(const char *emsg, ...)
 116 {
 117         va_list  ap;
 118
 119         if (debug || debugsyslog) {
 120                 va_start(ap, emsg);
 121                 vlog(LOG_DEBUG, emsg, ap);
 122                 va_end(ap);
 123         }
 124 }
 125
 126 void
 127 fatal(const char *emsg)
 128 {
 129         if (emsg == NULL)
 130                 logit(LOG_CRIT, "fatal: %s", strerror(errno));
 131         else
 132                 if (errno)
 133                         logit(LOG_CRIT, "fatal: %s: %s",
 134                             emsg, strerror(errno));
 135                 else
 136                         logit(LOG_CRIT, "fatal: %s", emsg);
 137
 138         exit(1);
 139 }
 140
 141 void
 142 fatalx(const char *emsg)
 143 {
 144         errno = 0;
 145         fatal(emsg);
 146 }