src/log/ModSyslog.cc

   1 /*
   2  * Copyright (C) 1996-2017 The Squid Software Foundation and contributors
   3  *
   4  * Squid software is distributed under GPLv2+ license and includes
   5  * contributions from numerous individuals and organizations.
   6  * Please see the COPYING and CONTRIBUTORS files for details.
   7  */
   8
   9 /* DEBUG: section 50    Log file handling */
  10
  11 #include "squid.h"
  12 #include "Debug.h"
  13
  14 #if HAVE_SYSLOG
  15
  16 #include "log/File.h"
  17 #include "log/ModSyslog.h"
  18
  19 /* Define LOG_AUTHPRIV as LOG_AUTH on systems still using the old deprecated LOG_AUTH */
  20 #if !defined(LOG_AUTHPRIV) && defined(LOG_AUTH)
  21 #define LOG_AUTHPRIV LOG_AUTH
  22 #endif
  23
  24 typedef struct {
  25     const char *name;
  26     int value;
  27 } syslog_symbol_t;
  28
  29 static int
  30 syslog_ntoa(const char *s)
  31 {
  32 #define syslog_symbol(a) #a, a
  33     static syslog_symbol_t symbols[] = {
  34 #ifdef LOG_AUTHPRIV
  35         {syslog_symbol(LOG_AUTHPRIV)},
  36 #endif
  37 #ifdef LOG_DAEMON
  38         {syslog_symbol(LOG_DAEMON)},
  39 #endif
  40 #ifdef LOG_LOCAL0
  41         {syslog_symbol(LOG_LOCAL0)},
  42 #endif
  43 #ifdef LOG_LOCAL1
  44         {syslog_symbol(LOG_LOCAL1)},
  45 #endif
  46 #ifdef LOG_LOCAL2
  47         {syslog_symbol(LOG_LOCAL2)},
  48 #endif
  49 #ifdef LOG_LOCAL3
  50         {syslog_symbol(LOG_LOCAL3)},
  51 #endif
  52 #ifdef LOG_LOCAL4
  53         {syslog_symbol(LOG_LOCAL4)},
  54 #endif
  55 #ifdef LOG_LOCAL5
  56         {syslog_symbol(LOG_LOCAL5)},
  57 #endif
  58 #ifdef LOG_LOCAL6
  59         {syslog_symbol(LOG_LOCAL6)},
  60 #endif
  61 #ifdef LOG_LOCAL7
  62         {syslog_symbol(LOG_LOCAL7)},
  63 #endif
  64 #ifdef LOG_USER
  65         {syslog_symbol(LOG_USER)},
  66 #endif
  67 #ifdef LOG_ERR
  68         {syslog_symbol(LOG_ERR)},
  69 #endif
  70 #ifdef LOG_WARNING
  71         {syslog_symbol(LOG_WARNING)},
  72 #endif
  73 #ifdef LOG_NOTICE
  74         {syslog_symbol(LOG_NOTICE)},
  75 #endif
  76 #ifdef LOG_INFO
  77         {syslog_symbol(LOG_INFO)},
  78 #endif
  79 #ifdef LOG_DEBUG
  80         {syslog_symbol(LOG_DEBUG)},
  81 #endif
  82         {NULL, 0}
  83     };
  84     syslog_symbol_t *p;
  85
  86     for (p = symbols; p->name != NULL; ++p)
  87         if (!strcmp(s, p->name) || !strcasecmp(s, p->name + 4))
  88             return p->value;
  89
  90     debugs(1, DBG_IMPORTANT, "Unknown syslog facility/priority '" << s << "'");
  91     return 0;
  92 }
  93
  94 typedef struct {
  95     int syslog_priority;
  96 } l_syslog_t;
  97
  98 #define PRIORITY_MASK (LOG_ERR | LOG_WARNING | LOG_NOTICE | LOG_INFO | LOG_DEBUG)
  99
 100 static void
 101 logfile_mod_syslog_writeline(Logfile * lf, const char *buf, size_t)
 102 {
 103     l_syslog_t *ll = (l_syslog_t *) lf->data;
 104     syslog(ll->syslog_priority, "%s", (char *) buf);
 105 }
 106
 107 static void
 108 logfile_mod_syslog_linestart(Logfile *)
 109 {
 110 }
 111
 112 static void
 113 logfile_mod_syslog_lineend(Logfile *)
 114 {
 115 }
 116
 117 static void
 118 logfile_mod_syslog_flush(Logfile *)
 119 {
 120 }
 121
 122 static void
 123 logfile_mod_syslog_rotate(Logfile *, const int16_t)
 124 {
 125 }
 126
 127 static void
 128 logfile_mod_syslog_close(Logfile *lf)
 129 {
 130     xfree(lf->data);
 131     lf->data = NULL;
 132 }
 133
 134 /*
 135  * This code expects the path to be syslog:<priority>
 136  */
 137 int
 138 logfile_mod_syslog_open(Logfile * lf, const char *path, size_t, int)
 139 {
 140     lf->f_close = logfile_mod_syslog_close;
 141     lf->f_linewrite = logfile_mod_syslog_writeline;
 142     lf->f_linestart = logfile_mod_syslog_linestart;
 143     lf->f_lineend = logfile_mod_syslog_lineend;
 144     lf->f_flush = logfile_mod_syslog_flush;
 145     lf->f_rotate = logfile_mod_syslog_rotate;
 146
 147     l_syslog_t *ll = static_cast<l_syslog_t*>(xcalloc(1, sizeof(*ll)));
 148     lf->data = ll;
 149
 150     ll->syslog_priority = LOG_INFO;
 151
 152     if (path[6] != '\0') {
 153         char *priority = xstrdup(path);
 154         char *facility = (char *) strchr(priority, '.');
 155         if (!facility)
 156             facility = (char *) strchr(priority, '|');
 157         if (facility) {
 158             *facility = '\0';
 159             ++facility;
 160             ll->syslog_priority |= syslog_ntoa(facility);
 161         }
 162         ll->syslog_priority |= syslog_ntoa(priority);
 163         xfree(priority);
 164         if ((ll->syslog_priority & PRIORITY_MASK) == 0)
 165             ll->syslog_priority |= LOG_INFO;
 166     }
 167
 168     return 1;
 169 }
 170 #endif
 171