src/basic/syslog-util.c

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