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fli4l logs all output produced while booting into the file (/var/tmp/boot.log). After the boot process has finished you can review this file at the console or using the web interface.
Sometimes it is useful to generate a more detailed trace of the start sequence, e.g. to analyze the boot process in case of problems. The variable DEBUG_STARTUP exists for this very reason. Other settings help developers to find bugs in certain situations; these settings are also documented in this section.
Default Setting: DEBUG_STARTUP='no'
If set to `yes', each command to be executed is written to the console
while booting. As a change in syslinux.cfg is necessary for enabling
this functionality, everything mentioned for SER_CONSOLE
also applies to this case. If you want to adapt syslinux.cfg by hand, you
need to insert fli4ldebug=yes to it. Nevertheless,
DEBUG_STARTUP needs to be set to `yes'.
Default Setting: DEBUG_MODULES='no'
Some modules are loaded automatically by the kernel without further notification. DEBUG_MODULES='yes' activates a mode showing the sequence of all modules being loaded, regardless whether they are loaded explicitly by a script or automatically by the kernel.
Default Setting: DEBUG_ENABLE_CORE='no'
If this setting is activated, every program crash causes the creation of a so-called ``core dump'', a memory image of the process just before the crash. These files are saved in the directory /var/log/dumps on the router and can be helpful in finding program errors. More details details can be found in the section ``Debugging programs on the fli4l'' in the documentation of the SRC package.
Default Setting: DEBUG_MDEV='no'
With DEBUG_MDEV='yes' all actions related to the mdev daemon will be logged, in detail all additions or removals of device nodes in /dev or the loading of firmware. Output is directed to the file /dev/mdev.log.
Default Setting: DEBUG_IPTABLES='no'
With DEBUG_IPTABLES='yes' all iptables invocations are logged to /var/log/iptables.log, including the return values.
Default Setting: DEBUG_IP='no'
With DEBUG_IP='yes' all invocations of the program /sbin/ip are logged to the file /var/log/wrapper.log.