1BINFMT.D(5) binfmt.d BINFMT.D(5)
2
6 binfmt.d - Configure additional binary formats for executables at boot
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9 /etc/binfmt.d/*.conf
10 /run/binfmt.d/*.conf
12 /usr/lib/binfmt.d/*.conf
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16 At boot, systemd-binfmt.service(8) reads configuration files from the
17 above directories to register in the kernel additional binary formats
18 for executables.
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21 Each file contains a list of binfmt_misc kernel binary format rules.
22 Consult the kernel's binfmt-misc.rst[1] documentation file for more
23 information on registration of additional binary formats and how to
24 write rules.
25 Empty lines and lines beginning with ; and # are ignored. Note that
27 this means you may not use ; and # as delimiter in binary format rules.
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30 Configuration files are read from directories in /etc/, /run/,
31 /usr/local/lib/, and /usr/lib/, in order of precedence. Each
32 configuration file in these configuration directories shall be named in
33 the style of filename.conf. Files in /etc/ override files with the same
34 name in /run/, /usr/local/lib/, and /usr/lib/. Files in /run/ override
35 files with the same name under /usr/.
36 Packages should install their configuration files in /usr/lib/
38 (distribution packages) or /usr/local/lib/ (local installs). Files in
39 /etc/ are reserved for the local administrator, who may use this logic
40 to override the configuration files installed by vendor packages. All
41 configuration files are sorted by their filename in lexicographic
42 order, regardless of which of the directories they reside in. If
43 multiple files specify the same option, the entry in the file with the
44 lexicographically latest name will take precedence. It is recommended
45 to prefix all filenames with a two-digit number and a dash, to simplify
46 the ordering of the files.
47 If the administrator wants to disable a configuration file supplied by
49 the vendor, the recommended way is to place a symlink to /dev/null in
50 the configuration directory in /etc/, with the same filename as the
51 vendor configuration file. If the vendor configuration file is included
52 in the initrd image, the image has to be regenerated.
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55 Example 1. /etc/binfmt.d/wine.conf example:
56 # Start WINE on Windows executables
58 :DOSWin:M::MZ::/usr/bin/wine:
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61 systemd(1), systemd-binfmt.service(8), systemd-delta(1), wine(8)
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64 1. binfmt-misc.rst
65 https://www.kernel.org/doc/html/latest/admin-guide/binfmt-misc.html
66systemd 243 BINFMT.D(5)