Prints The Various Glibc Versions Required By An Executable · GitHub

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fasterthanlime/glibc-check.sh Last active May 20, 2025 12:19 Show Gist options

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Learn more about clone URLs Clone this repository at <script src="https://gist.github.com/fasterthanlime/17e002a8f5e0f189861c.js"></script> Save fasterthanlime/17e002a8f5e0f189861c to your computer and use it in GitHub Desktop. Download ZIP Prints the various glibc versions required by an executable Raw glibc-check.sh This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters Show hidden characters

#!/bin/bash

# This scripts lets you check which minimum GLIBC version an executable requires.

# Simply run './glibc-check.sh path/to/your/binary'

#

# You can set `MAX_VER` however low you want, although I (fasterthanlime)

# feel like `2.13` is a good target (For reference, Ubuntu 12.04 has GLIBC 2.15)

MAX_VER=2.13

SCRIPTPATH=$( cd $(dirname $0) ; pwd -P )

BINARY=$1

# Version comparison function in bash

vercomp () {

if [[ $1 == $2 ]]

then

return 0

fi

local IFS=.

local i ver1=($1) ver2=($2)

# fill empty fields in ver1 with zeros

for ((i=${#ver1[@]}; i<${#ver2[@]}; i++))

do

ver1[i]=0

done

for ((i=0; i<${#ver1[@]}; i++))

do

if [[ -z ${ver2[i]} ]]

then

# fill empty fields in ver2 with zeros

ver2[i]=0

fi

if ((10#${ver1[i]} > 10#${ver2[i]}))

then

return 1

fi

if ((10#${ver1[i]} < 10#${ver2[i]}))

then

return 2

fi

done

return 0

}

IFS="

"

VERS=$(objdump -T $BINARY | grep GLIBC | sed 's/.*GLIBC_\([.0-9]*\).*/\1/g' | sort -u)

for VER in $VERS; do

vercomp $VER $MAX_VER

COMP=$?

if [[ $COMP -eq 1 ]]; then

echo "Error! ${BINARY} requests GLIBC ${VER}, which is higher than target ${MAX_VER}"

echo "Affected symbols:"

objdump -T $BINARY | grep GLIBC_${VER}

echo "Looking for symbols in libraries..."

for LIBRARY in $(ldd $BINARY | cut -d ' ' -f 3); do

echo $LIBRARY

objdump -T $LIBRARY | fgrep GLIBC_${VER}

done

exit 27

else

echo "Found version ${VER}"

fi

done

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vladimyr commented Apr 20, 2021

Hi @fastherthanlime, I made some changes to your script to support passing MAX_VER from outside and to address shellcheck errors/warnings. If you like you can apply them from my fork https://gist.github.com/vladimyr/9a03481154cd3048a486bdf71e5e1535/revisions#diff-965e0221b4c963db6160a8696801c154e00daca1583db528949f984e48281915

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