support/nfs/xlog.c

   1 /*
   2  * support/nfs/xlog.c
   3  *
   4  * This module handles the logging of requests.
   5  *
   6  * TODO:        Merge the two "XXX_log() calls.
   7  *
   8  * Authors:     Donald J. Becker, <becker@super.org>
   9  *              Rick Sladkey, <jrs@world.std.com>
  10  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  11  *              Olaf Kirch, <okir@monad.swb.de>
  12  *
  13  *              This software maybe be used for any purpose provided
  14  *              the above copyright notice is retained.  It is supplied
  15  *              as is, with no warranty expressed or implied.
  16  */
  17
  18 #ifdef HAVE_CONFIG_H
  19 #include <config.h>
  20 #endif
  21
  22 #include <unistd.h>
  23 #include <signal.h>
  24 #include <time.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <stdio.h>
  28 #include <stdarg.h>
  29 #include <syslog.h>
  30 #include "nfslib.h"
  31
  32 #undef  VERBOSE_PRINTF
  33
  34 static int  log_stderr = 1;
  35 static int  log_syslog = 1;
  36 static int  logging = 0;                /* enable/disable DEBUG logs    */
  37 static int  logmask = 0;                /* What will be logged          */
  38 static char log_name[256];              /* name of this program         */
  39 static int  log_pid = -1;               /* PID of this program          */
  40
  41 static void     xlog_toggle(int sig);
  42 static struct xlog_debugfac     debugnames[] = {
  43         { "general",    D_GENERAL, },
  44         { "call",       D_CALL, },
  45         { "auth",       D_AUTH, },
  46         { "parse",      D_PARSE, },
  47         { "all",        D_ALL, },
  48         { NULL,         0, },
  49 };
  50
  51 void
  52 xlog_open(char *progname)
  53 {
  54         openlog(progname, LOG_PID, LOG_DAEMON);
  55
  56         strncpy(log_name, progname, sizeof (log_name) - 1);
  57         log_name [sizeof (log_name) - 1] = '\0';
  58         log_pid = getpid();
  59
  60         signal(SIGUSR1, xlog_toggle);
  61         signal(SIGUSR2, xlog_toggle);
  62 }
  63
  64 void
  65 xlog_stderr(int on)
  66 {
  67         log_stderr = on;
  68 }
  69
  70 void
  71 xlog_syslog(int on)
  72 {
  73         log_syslog = on;
  74 }
  75
  76 static void
  77 xlog_toggle(int sig)
  78 {
  79         unsigned int    tmp, i;
  80
  81         if (sig == SIGUSR1) {
  82                 if ((logmask & D_ALL) && !logging) {
  83                         xlog(D_GENERAL, "turned on logging");
  84                         logging = 1;
  85                         return;
  86                 }
  87                 tmp = ~logmask;
  88                 logmask |= ((logmask & D_ALL) << 1) | D_GENERAL;
  89                 for (i = -1, tmp &= logmask; tmp; tmp >>= 1, i++)
  90                         if (tmp & 1)
  91                                 xlog(D_GENERAL,
  92                                         "turned on logging level %d", i);
  93         } else {
  94                 xlog(D_GENERAL, "turned off logging");
  95                 logging = 0;
  96         }
  97         signal(sig, xlog_toggle);
  98 }
  99
 100 void
 101 xlog_config(int fac, int on)
 102 {
 103         if (on)
 104                 logmask |= fac;
 105         else
 106                 logmask &= ~fac;
 107         if (on)
 108                 logging = 1;
 109 }
 110
 111 void
 112 xlog_sconfig(char *kind, int on)
 113 {
 114         struct xlog_debugfac    *tbl = debugnames;
 115
 116         while (tbl->df_name != NULL && strcasecmp(tbl->df_name, kind))
 117                 tbl++;
 118         if (!tbl->df_name) {
 119                 xlog (L_WARNING, "Invalid debug facility: %s\n", kind);
 120                 return;
 121         }
 122         xlog_config(tbl->df_fac, on);
 123 }
 124
 125 int
 126 xlog_enabled(int fac)
 127 {
 128         return (logging && (fac & logmask));
 129 }
 130
 131
 132 /* Write something to the system logfile and/or stderr */
 133 void
 134 xlog(int kind, const char *fmt, ...)
 135 {
 136         char            buff[1024];
 137         va_list         args;
 138         int             n;
 139
 140         if (!(kind & (L_ALL)) && !(logging && (kind & logmask)))
 141                 return;
 142
 143         va_start(args, fmt);
 144         vsnprintf(buff, sizeof (buff), fmt, args);
 145         va_end(args);
 146
 147         if ((n = strlen(buff)) > 0 && buff[n-1] == '\n')
 148                 buff[--n] = '\0';
 149
 150         if (log_syslog) {
 151                 switch (kind) {
 152                 case L_FATAL:
 153                         syslog(LOG_ERR, "%s", buff);
 154                         break;
 155                 case L_ERROR:
 156                         syslog(LOG_ERR, "%s", buff);
 157                         break;
 158                 case L_WARNING:
 159                         syslog(LOG_WARNING, "%s", buff);
 160                         break;
 161                 case L_NOTICE:
 162                         syslog(LOG_NOTICE, "%s", buff);
 163                         break;
 164                 default:
 165                         if (!log_stderr)
 166                                 syslog(LOG_INFO, "%s", buff);
 167                         break;
 168                 }
 169         }
 170
 171         if (log_stderr) {
 172 #ifdef VERBOSE_PRINTF
 173                 time_t          now;
 174                 struct tm       *tm;
 175
 176                 time(&now);
 177                 tm = localtime(&now);
 178                 fprintf(stderr, "%s[%d] %04d-%02d-%02d %02d:%02d:%02d %s\n",
 179                                 log_name, log_pid,
 180                                 tm->tm_year+1900, tm->tm_mon + 1, tm->tm_mday,
 181                                 tm->tm_hour, tm->tm_min, tm->tm_sec,
 182                                 buff);
 183 #else
 184                 fprintf(stderr, "%s: %s\n", log_name, buff);
 185 #endif
 186         }
 187
 188         if (kind == L_FATAL)
 189                 exit(1);
 190 }