winsup/cygserver/bsd_log.cc

   1 /* bsd_log.cc
   2
   3 This file is part of Cygwin.
   4
   5 This software is a copyrighted work licensed under the terms of the
   6 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   7 details. */
   8 #ifdef __OUTSIDE_CYGWIN__
   9 #include "woutsup.h"
  10 #define _KERNEL 1
  11 #define __BSD_VISIBLE 1
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14 #include <libgen.h>
  15
  16 int32_t log_level = 8; /* Illegal value.  Don't change! */
  17 tun_bool_t log_debug = TUN_UNDEF;
  18 tun_bool_t log_syslog = TUN_UNDEF;
  19 tun_bool_t log_stderr = TUN_UNDEF;
  20
  21 static CRITICAL_SECTION cs;
  22 static bool cs_inited;
  23
  24 void
  25 loginit (tun_bool_t opt_stderr, tun_bool_t opt_syslog)
  26 {
  27   if (log_debug == TUN_UNDEF)
  28     TUNABLE_BOOL_FETCH ("kern.log.debug", &log_debug);
  29   if (log_debug == TUN_UNDEF)
  30     log_debug = TUN_FALSE;
  31
  32   if (opt_stderr != TUN_UNDEF)
  33     log_stderr = opt_stderr;
  34   else
  35     TUNABLE_BOOL_FETCH ("kern.log.stderr", &log_stderr);
  36   if (log_stderr == TUN_UNDEF)
  37     log_stderr = TUN_FALSE;
  38
  39   if (opt_syslog != TUN_UNDEF)
  40     log_syslog = opt_syslog;
  41   else
  42     TUNABLE_BOOL_FETCH ("kern.log.syslog", &log_syslog);
  43   if (log_syslog == TUN_UNDEF)
  44     log_syslog = TUN_FALSE;
  45
  46   if (log_level == 8)
  47     TUNABLE_INT_FETCH ("kern.log.level", &log_level);
  48   if (log_level == 8)
  49     log_level = 6;
  50   InitializeCriticalSection (&cs);
  51   cs_inited = true;
  52 }
  53
  54 void
  55 _vlog (const char *file, int line, int level,
  56         const char *fmt, va_list ap)
  57 {
  58   char buf[16384];
  59   char *pos;
  60
  61   if ((level == LOG_DEBUG && log_debug != TUN_TRUE)
  62       || (level != LOG_DEBUG && level >= log_level))
  63     return;
  64   pos = stpcpy (buf, "cygserver: ");
  65   if (file && log_debug == TUN_TRUE)
  66     pos += snprintf (pos, 16384 - (pos - buf), "%s, line %d: ",
  67                      basename ((char *) file), line);
  68   vsnprintf (pos, 16384 - (pos - buf), fmt, ap);
  69   if (log_syslog == TUN_TRUE && level != LOG_DEBUG)
  70     syslog (level, buf);
  71   if (log_stderr == TUN_TRUE || level == LOG_DEBUG)
  72     {
  73       if (!cs_inited)   /* Only occurs in --help scenario */
  74         {
  75           InitializeCriticalSection (&cs);
  76           cs_inited = true;
  77         }
  78       EnterCriticalSection (&cs);
  79       fputs (buf, stderr);
  80       fputc ('\n', stderr);
  81       LeaveCriticalSection (&cs);
  82     }
  83 }
  84
  85 void
  86 _log (const char *file, int line, int level, const char *fmt, ...)
  87 {
  88   va_list ap;
  89   va_start (ap, fmt);
  90   _vlog (file, line, level, fmt, ap);
  91 }
  92
  93 void
  94 _vpanic (const char *file, int line, const char *fmt, va_list ap)
  95 {
  96   _vlog (file, line, LOG_EMERG, fmt, ap);
  97   exit (1);
  98 }
  99
 100 void
 101 _panic (const char *file, int line, const char *fmt, ...)
 102 {
 103   va_list ap;
 104   va_start (ap, fmt);
 105   _vpanic (file, line, fmt, ap);
 106 }
 107 #endif /* __OUTSIDE_CYGWIN__ */