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#
# For a description of the syntax of this configuration file,
# see misc/tools/kconfig-language.txt.
#
comment "System Logging"
config RAMLOG
bool "RAM log device support"
default n
---help---
This is a driver that was intended to support debugging output,
aka syslogging, when the normal serial output is not available.
For example, if you are using a telnet or USB serial console,
the debug output will get lost. However, the RAMLOG device should
be usable even if system logging is disabled.
This driver is similar to a pipe in that it saves the debugging
output in a FIFO in RAM. It differs from a pipe in numerous
details as needed to support logging.
if RAMLOG
config RAMLOG_SYSLOG
bool "Use RAMLOG for SYSLOG"
default n
depends on SYSLOG
---help---
Use the RAM logging device for the syslogging interface. If this feature
is enabled (along with SYSLOG), then all debug output (only) will be re-directed
to the circular buffer in RAM. This RAM log can be view from NSH using the
'dmesg'command.
Do not enable more than one SYSLOG device.
config RAMLOG_CONSOLE
bool "Use RAMLOG for /dev/console"
default n
depends on DEV_CONSOLE
---help---
Use the RAM logging device as a system console. If this feature is enabled (along
with DEV_CONSOLE), then all console output will be re-directed to a circular
buffer in RAM. This is useful, for example, if the only console is a Telnet
console. Then in that case, console output from non-Telnet threads will go to
the circular buffer and can be viewed using the NSH 'dmesg' command.
config RAMLOG_BUFSIZE
int "RAMLOG buffer size"
default 1024
depends on RAMLOG_SYSLOG || RAMLOG_CONSOLE
---help---
Size of the console RAM log. Default: 1024
config RAMLOG_CRLF
bool "RAMLOG CR/LF"
default n
---help---
Pre-pend a carriage return before every linefeed that goes into the RAM log.
config RAMLOG_NONBLOCKING
bool "RAMLOG non-block reads"
default y
---help---
Reading from the RAMLOG will never block if the RAMLOG is empty. If the RAMLOG
is empty, then zero is returned (usually interpreted as end-of-file).
config RAMLOG_NPOLLWAITERS
int "RAMLOG number of poll waiters"
default 4
depends on !DISABLE_POLL
---help---
The maximum number of threads that may be waiting on the poll method.
endif
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