binfmt.d - Configure additional binary formats for executables at boot
/etc/binfmt.d/*.conf
/run/binfmt.d/*.conf
/usr/lib/binfmt.d/*.conf
At boot,
systemd-binfmt.service(8) reads configuration files from the
above directories to register in the kernel additional binary formats for
executables.
Each file contains a list of binfmt_misc kernel binary format rules. Consult the
kernel's
Kernel Support for miscellaneous Binary Formats
(binfmt_misc)[1] documentation file for more information on registration
of additional binary formats and how to write rules.
Empty lines and lines beginning with ";" and "#" are
ignored. Note that this means you may not use those symbols as the delimiter
in binary format rules.
Configuration files are read from directories in /etc/, /run/, /usr/local/lib/,
and /lib/, in order of precedence, as listed in the SYNOPSIS section above.
Files must have the ".conf" extension. Files in /etc/ override files
with the same name in /run/, /usr/local/lib/, and /lib/. Files in /run/
override files with the same name under /usr/.
All configuration files are sorted by their filename in lexicographic order,
regardless of which of the directories they reside in. If multiple files
specify the same option, the entry in the file with the lexicographically
latest name will take precedence. Thus, the configuration in a certain file
may either be replaced completely (by placing a file with the same name in a
directory with higher priority), or individual settings might be changed (by
specifying additional settings in a file with a different name that is ordered
later).
Packages should install their configuration files in /usr/lib/ (distribution
packages) or /usr/local/lib/ (local installs). Files in /etc/ are reserved for
the local administrator, who may use this logic to override the configuration
files installed by vendor packages. It is recommended to prefix all filenames
with a two-digit number and a dash, to simplify the ordering of the files.
If the administrator wants to disable a configuration file supplied by the
vendor, the recommended way is to place a symlink to /dev/null in the
configuration directory in /etc/, with the same filename as the vendor
configuration file. If the vendor configuration file is included in the initrd
image, the image has to be regenerated.
Example 1. /etc/binfmt.d/wine.conf example:
# Start WINE on Windows executables
:DOSWin:M::MZ::/usr/bin/wine:
systemd(1),
systemd-binfmt.service(8),
systemd-delta(1),
wine(8)
- 1.
- Kernel Support for miscellaneous Binary Formats
(binfmt_misc)