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Sometimes you only know which debug logging facility names you want to turn off, not necessarily all the ones you want enabled. This patch allows the debug string to contain facility names in the $debug variable which are prefixed with a "-" to disable debug log messages for that conditional. Say you want all debug logging on except for btrfs and scripting, then do: "set debug=all,-btrfs,-scripting" Note, that only the last occurrence of the facility name with or without a leading "-" is considered. So simply appending ",-facilityname" to the $debug variable will disable that conditional. To illustrate, the command "set debug=all,-btrfs,-scripting,btrfs" will enable btrfs. Also, add documentation explaining this new behavior. Signed-off-by: Glenn Washburn <development@efficientek.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'