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syslog calculate facility and severity from PRI(priority)
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example: | |
PRI = 191 | |
To get the Facility | |
Divide the PRI number by 8. | |
191/8 = 23.875 | |
The whole number part is the facility. | |
To get the Severity | |
Take the whole number part 23 and multiply by 8 and the product subtract from 191: | |
191 - (23 * 8 )= 7 | |
PRI = Facility 23 and Priority (7) | |
Work backword to check our work: | |
23*8 = 184 + 7 = 191 |
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syslog severity overview | |
Numerical Severity | |
Code | |
0 Emergency: system is unusable | |
1 Alert: action must be taken immediately | |
2 Critical: critical conditions | |
3 Error: error conditions | |
4 Warning: warning conditions | |
5 Notice: normal but significant condition | |
6 Informational: informational messages | |
7 Debug: debug-level messages |
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Numerical Facility | |
Code | |
0 kernel messages | |
1 user-level messages | |
2 mail system | |
3 system daemons | |
4 security/authorization messages (note 1) | |
5 messages generated internally by syslogd | |
6 line printer subsystem | |
7 network news subsystem | |
8 UUCP subsystem | |
9 clock daemon (note 2) | |
10 security/authorization messages (note 1) | |
11 FTP daemon | |
12 NTP subsystem | |
13 log audit (note 1) | |
14 log alert (note 1) | |
15 clock daemon (note 2) | |
16 local use 0 (local0) | |
17 local use 1 (local1) | |
18 local use 2 (local2) | |
19 local use 3 (local3) | |
20 local use 4 (local4) | |
21 local use 5 (local5) | |
22 local use 6 (local6) | |
23 local use 7 (local7) |
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