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Full Discussion: Help about "file" cmd
Top Forums UNIX for Dummies Questions & Answers Help about "file" cmd Post 302675029 by alister on Saturday 21st of July 2012 09:07:22 AM
Old 07-21-2012
Quote:
Originally Posted by yanglei_fage
But I can't find where tell "2.6.16"
You won't find that in the magic file. Once file determines that it is dealing with an elf executable, it examines various sections of the elf binary for information left behind by the toolchain that built the binary.

For example, the vendor information is in a PT_NOTES section, PT_INTERP/PT_DYNAMIC can be used to determine if the binary is statically or dynamically linked, etc. You can't use grep on the binary because a lot of this information is in a binary format (for example, the vendor name and ABI version numbers).

What are you trying to accomplish?

Regards,
Alister
 

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LEARN ABOUT CENTOS

binfmt.d

BINFMT.D(5)							     binfmt.d							       BINFMT.D(5)

NAME

       binfmt.d - Configure additional binary formats for executables at boot

SYNOPSIS

       /etc/binfmt.d/*.conf

       /run/binfmt.d/*.conf

       /usr/lib/binfmt.d/*.conf

DESCRIPTION

       At boot, systemd-binfmt.service(8) reads configuration files from the above directories to register in the kernel additional binary formats
       for executables.

CONFIGURATION FORMAT

       Each file contains a list of binfmt_misc kernel binary format rules. Consult binfmt_misc.txt[1] 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 ; and # as delimiter in binary format rules.

       Each configuration file shall be named in the style of program.conf. Files in /etc/ override files with the same name in /usr/lib/ and
       /run/. Files in /run/ override files with the same name in /usr/lib/. Packages should install their configuration files in /usr/lib/, files
       in /etc/ are reserved for the local administrator, who may use this logic to override the configuration files installed from vendor
       packages. All files are sorted by their filename in lexicographic order, regardless of which of the directories they reside in. If multiple
       files specify the same binary type name, the entry in the file with the lexicographically latest name will be applied.

       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 /etc/binfmt.d/ bearing the same filename.

EXAMPLE

       Example 1. /etc/binfmt.d/wine.conf example:

	   # Start WINE on Windows executables
	   :DOSWin:M::MZ::/usr/bin/wine:

SEE ALSO

       systemd(1), systemd-binfmt.service(8), systemd-delta(1), wine(8)

NOTES

	1. binfmt_misc.txt
	   https://www.kernel.org/doc/Documentation/binfmt_misc.txt

systemd 208															       BINFMT.D(5)
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