NAME

       scanelf - user-space utility to scan ELF files

SYNOPSIS

       scanelf [options] ELFs or directories

DESCRIPTION

       scanelf is a user-space utility to quickly scan given ELFs, directories, or common system paths for
       different information. This may include ELF types, their PaX markings, TEXTRELs, etc...

OPTIONS

       -A, --archives
           Scan archives (.a files)

       -a, --all
           Print all useful/simple info

       -B, --nobanner
           Don't display the header

       -b, --bind
           Print symbol binding information (lazy or now)

       -D, --endian
           Print ELF endianness (big/little/...)

       -E, --etype ETYPE
           Print only ELF files matching specified etype (like ET_DYN, ET_EXEC, etc...)

       -e, --header
           Print GNU_STACK markings

       -F, --format FORMAT
           Use specified format for output; see the FORMAT section for more information

       -f, --from FILE
           Read input stream from specified filename

       -g, --gmatch
           Use strncmp to match libraries (use with -N). Or regexp with symbol matching

       -h, --help
           Show condensed usage and exit

       -I, --osabi
           Print OSABI

       -i, --interp
           Print the interpreter information (.interp/PT_INTERP)

       -k, --section SECTION
           Find ELFs with the specified section

       -L, --ldcache
           Utilize ld.so.cache information (use with -r/-n)

       -l, --ldpath
           Scan all directories in /etc/ld.so.conf

       -M, --bits BITS
           Print only ELF files matching specified numeric bits (like 32/64)

       -m, --mount
           Don't recursively cross mount points

       -N, --lib SONAME
           Find ELFs that need the specified SONAME

       -n, --needed
           Print libraries the ELF is linked against (DT_NEEDED)

       -O, --perms PERMS
           Print only ELF files with matching specified octal bits (like 755)

       -o, --file FILE
           Write output stream to specified filename

       -p, --path
           Scan all directories in PATH environment

       -q, --quiet
           Only output 'bad' things

       -R, --recursive
           Scan directories recursively

       -r, --rpath
           Print runpaths encoded in the ELF (DT_RPATH/DT_RUNPATH)

       -S, --soname
           Print the ELF's shared library name (DT_SONAME)

       -s, --symbol SYMBOL
           Find the specified symbol; see SYMBOL MATCHING for more info

       -T, --textrels
           Locate cause of TEXTRELs via objdump

       -t, --textrel
           Print TEXTREL information

       -V, --version
           Print version and exit

       -v, --verbose
           Be verbose (can be used more than once)

       -X, --fix
           Try and 'fix' bad things (use with -r/-e)

       -x, --pax
           Print PaX markings

       -Y, --eabi
           Print EABI (only matters for a few architectures)

       -y, --symlink
           Don't scan symlinks

       -Z, --size SIZE
           Print ELF file size

       -z, --setpax FLAGS
           Sets EI_PAX/PT_PAX_FLAGS to specified flags (use with -Xx)

FORMAT

       The format string is much like a printf string in that it is a literal string with flags requesting
       different information. For example, you could use a format string and expect the following results.

             # scanelf -BF "file %f needs %n; funky time" /bin/bash
             file bash needs libncurses.so.5,libdl.so.2,libc.so.6; funky time

       Note that when you use a format string, generally information related flags should be omitted. In other
       words, you do not want to try and request NEEDED output (-n) and try to specify a format output at the
       sametime as these operations are mutually exclusive. Each information related flag has an equivalent
       conversion specifier, so use those instead. You can of course continue to use non-information related
       flags (such as --verbose).

       There are three characters that introduce conversion specifiers.

       • % - replace with info
       • # - silent boolean match
       • + - verbose match

       And there are a number of conversion specifiers. We try to match up the specifier with corresponding
       option.

       • a - machine (EM) type
       • b - bind flags
       • e - program headers
       • D - endian
       • I - osabi
       • Y - eabi
       • F - long filename
       • f - short filename
       • i - interp
       • k - section
       • M - EI class
       • N - specified needed
       • n - needed libraries
       • p - filename (minus search)
       • o - etype
       • O - perms
       • r - runpaths
       • S - SONAME
       • s - symbol
       • T - all textrels
       • t - textrel status
       • x - pax flags

SYMBOL MATCHING

       A - prefix will only show undefined references while a + prefix will only show defined references while
       no prefix will show both.

ELF ETYPES

       You can narrow your search by specifying the ELF object file type (ETYPE). The commandline option takes
       the numeric value and or symbolic type. Multiple values can be passed comma separated. Example -E
       ET_EXEC,ET_DYN,1

       Here is the normal list available for your pleasure. You of course are free to specify any numeric value
       you want.

       • 0 - ET_NONE - unknown type
       • 1 - ET_REL - relocatable file
       • 2 - ET_EXEC - executable file
       • 3 - ET_DYN - shared object
       • 4 - ET_CORE - core file

ELF BITS

       You can also narrow your search by specifying the ELF bitsize. Again, specify the numeric value or the
       symbolic define.

       • 32 - ELFCLASS32 - 32bit ELFs
       • 64 - ELFCLASS64 - 64bit ELFs

HOMEPAGE

       http://hardened.gentoo.org/pax-utils.xml

REPORTING BUGS

       Please include as much information as possible (using any available debugging options) and send bug
       reports to the maintainers (see the AUTHORS section). Please use the Gentoo bugzilla at
       http://bugs.gentoo.org/ if possible.

SEE ALSO

       chpax(1), dumpelf(1), paxctl(1), pspax(1), readelf(1), scanelf(1)

AUTHORS

       Ned Ludd <solar@gentoo.org>
           Maintainer

       Mike Frysinger <vapier@gentoo.org>
           Maintainer

       Fabian Groffen <grobian@gentoo.org>
           Mach-O Maintainer

NOTES

        1. http://hardened.gentoo.org/pax-utils.xml

        2. http://bugs.gentoo.org/