From 7ec935e03f13baa899ab62f5c8348eec5ca35e5c Mon Sep 17 00:00:00 2001 From: Christian Mauderer Date: Fri, 23 Mar 2018 07:58:18 +0100 Subject: vprintf: Add handler that mutes all output. This adds a vprintf handler that can be used to suppress all outputs of the libbsd. --- libbsd.txt | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'libbsd.txt') diff --git a/libbsd.txt b/libbsd.txt index f66a41bf..e7a9f784 100644 --- a/libbsd.txt +++ b/libbsd.txt @@ -265,6 +265,30 @@ their own implementation of the `rtems_bsd_get_allocator_domain_size()` function (for example in the module which calls `rtems_bsd_initialize()`) if different values are desired. The default size is 8MiB for all domains. +=== Redirecting or Disabling the Output === + +A lot of system messages are printed to the stdout by default. If you want to +redirect them you can overwrite the default print handler. That can even be done +before the libbsd initialization to catch all messages. An example would look +like follows: + +------------------------------------------------------------------------------- +int my_vprintf_handler(int level, const char *fmt, va_list ap) { + /* Do something with the messages. */ + + return number_of_printed_chars; +} + +... + /* In your initialization: */ + rtems_bsd_vprintf_handler old; + old = rtems_bsd_set_vprintf_handler(my_vprintf_handler); +... +------------------------------------------------------------------------------- + +As a special case, you can set the `rtems_bsd_vprintf_handler_mute(...)` +provided by libbsd to suppress all output. + == Network Stack Features http://roy.marples.name/projects/dhcpcd/index[DHCPCD(8)]:: DHCP client -- cgit v1.2.3