src/basic/syslog-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2010 Lennart Poettering
   6 ***/
   7
   8 #include <string.h>
   9 #include <syslog.h>
  10
  11 #include "hexdecoct.h"
  12 #include "macro.h"
  13 #include "string-table.h"
  14 #include "syslog-util.h"
  15
  16 int syslog_parse_priority(const char **p, int *priority, bool with_facility) {
  17         int a = 0, b = 0, c = 0;
  18         int k;
  19
  20         assert(p);
  21         assert(*p);
  22         assert(priority);
  23
  24         if ((*p)[0] != '<')
  25                 return 0;
  26
  27         if (!strchr(*p, '>'))
  28                 return 0;
  29
  30         if ((*p)[2] == '>') {
  31                 c = undecchar((*p)[1]);
  32                 k = 3;
  33         } else if ((*p)[3] == '>') {
  34                 b = undecchar((*p)[1]);
  35                 c = undecchar((*p)[2]);
  36                 k = 4;
  37         } else if ((*p)[4] == '>') {
  38                 a = undecchar((*p)[1]);
  39                 b = undecchar((*p)[2]);
  40                 c = undecchar((*p)[3]);
  41                 k = 5;
  42         } else
  43                 return 0;
  44
  45         if (a < 0 || b < 0 || c < 0 ||
  46             (!with_facility && (a || b || c > 7)))
  47                 return 0;
  48
  49         if (with_facility)
  50                 *priority = a*100 + b*10 + c;
  51         else
  52                 *priority = (*priority & LOG_FACMASK) | c;
  53
  54         *p += k;
  55         return 1;
  56 }
  57
  58 static const char *const log_facility_unshifted_table[LOG_NFACILITIES] = {
  59         [LOG_FAC(LOG_KERN)] = "kern",
  60         [LOG_FAC(LOG_USER)] = "user",
  61         [LOG_FAC(LOG_MAIL)] = "mail",
  62         [LOG_FAC(LOG_DAEMON)] = "daemon",
  63         [LOG_FAC(LOG_AUTH)] = "auth",
  64         [LOG_FAC(LOG_SYSLOG)] = "syslog",
  65         [LOG_FAC(LOG_LPR)] = "lpr",
  66         [LOG_FAC(LOG_NEWS)] = "news",
  67         [LOG_FAC(LOG_UUCP)] = "uucp",
  68         [LOG_FAC(LOG_CRON)] = "cron",
  69         [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
  70         [LOG_FAC(LOG_FTP)] = "ftp",
  71         [LOG_FAC(LOG_LOCAL0)] = "local0",
  72         [LOG_FAC(LOG_LOCAL1)] = "local1",
  73         [LOG_FAC(LOG_LOCAL2)] = "local2",
  74         [LOG_FAC(LOG_LOCAL3)] = "local3",
  75         [LOG_FAC(LOG_LOCAL4)] = "local4",
  76         [LOG_FAC(LOG_LOCAL5)] = "local5",
  77         [LOG_FAC(LOG_LOCAL6)] = "local6",
  78         [LOG_FAC(LOG_LOCAL7)] = "local7"
  79 };
  80
  81 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_facility_unshifted, int, LOG_FAC(~0));
  82
  83 bool log_facility_unshifted_is_valid(int facility) {
  84         return facility >= 0 && facility <= LOG_FAC(~0);
  85 }
  86
  87 static const char *const log_level_table[] = {
  88         [LOG_EMERG] = "emerg",
  89         [LOG_ALERT] = "alert",
  90         [LOG_CRIT] = "crit",
  91         [LOG_ERR] = "err",
  92         [LOG_WARNING] = "warning",
  93         [LOG_NOTICE] = "notice",
  94         [LOG_INFO] = "info",
  95         [LOG_DEBUG] = "debug"
  96 };
  97
  98 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(log_level, int, LOG_DEBUG);
  99
 100 bool log_level_is_valid(int level) {
 101         return level >= 0 && level <= LOG_DEBUG;
 102 }