Difference between revisions of "Debugging output"
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| − | + | Net-SNMP applications and the agent support run-time selectable debugging output. The -D flag can be used to select tokens to display at runtime with a comma separated list. For example ''-Dtls,ssl,snmpd'' will display every debugging statement registered with the prefixes of "tls", "ssl" and "snmpd". This will include longer prefixes too such as "snmpd/main" and "sslctx_client" for example. | |
| + | |||
| + | |||
| + | == Command line options == | ||
| + | |||
| + | Options for using -D for DEBUG output | ||
| + | -D token[,token[,token]...] | ||
| + | |||
| + | To see every possible output use | ||
| + | -D all | ||
| + | |||
| + | The token are not predefined but defined through usage. | ||
| + | DEBUGMSG(( token, format, ...)) | ||
| + | |||
| + | To find all existing tokens try | ||
| + | cd net-snmp-<Version> | ||
| + | find . -name "*.c" | xargs grep "DEBUGMSG.*\"" | sed 's/^.*((//;s/,.*$//' | sort -u | grep "^\"" | ||
| + | |||
| + | for version 5.4.2.1 this returns 1589 tokens. | ||
| + | |||
| + | Some of these tokens will be found but not be used because they are inside a multiline comment. | ||
| + | |||
| + | [[debug_tokens_5.4.2.1]] | ||
| + | |||
| + | == Configuration files == | ||
| + | |||
| + | Note that if you want to turn on debugging via the config file, but *only* | ||
| + | for the agent (rather than all SNMP commands), then you'd need a block | ||
| + | something like | ||
| + | |||
| + | [snmp] | ||
| + | doDebugging 1 | ||
| + | debugTokens this,that,theother | ||
| + | |||
| + | in your snmpd.conf file. | ||
Revision as of 13:38, 30 June 2011
Net-SNMP applications and the agent support run-time selectable debugging output. The -D flag can be used to select tokens to display at runtime with a comma separated list. For example -Dtls,ssl,snmpd will display every debugging statement registered with the prefixes of "tls", "ssl" and "snmpd". This will include longer prefixes too such as "snmpd/main" and "sslctx_client" for example.
Command line options
Options for using -D for DEBUG output
-D token[,token[,token]...]
To see every possible output use
-D all
The token are not predefined but defined through usage.
DEBUGMSG(( token, format, ...))
To find all existing tokens try
cd net-snmp-<Version> find . -name "*.c" | xargs grep "DEBUGMSG.*\"" | sed 's/^.*((//;s/,.*$//' | sort -u | grep "^\""
for version 5.4.2.1 this returns 1589 tokens.
Some of these tokens will be found but not be used because they are inside a multiline comment.
Configuration files
Note that if you want to turn on debugging via the config file, but *only* for the agent (rather than all SNMP commands), then you'd need a block something like
[snmp]
doDebugging 1
debugTokens this,that,theother
in your snmpd.conf file.
