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install_bin.sh : use zsh if present

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bol-van 2023-12-18 13:49:30 +03:00 committed by GitHub
parent 37fa84336f
commit 3db4c9b746
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1 changed files with 5 additions and 3 deletions
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install_bin.sh
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@ -16,13 +16,15 @@ check_dir()
if [ -f "$exe" ]; then
if [ -x "$exe" ]; then
# ash and dash try to execute invalid executables as a script. they interpret binary garbage with possible negative consequences
# bash do not do this
# bash and zsh do not do this
if exists bash; then
out=$(echo 0.0.0.0 | bash -c "$exe" 2>/dev/null)
elif exists zsh; then
out=$(echo 0.0.0.0 | zsh -c "$exe" 2>/dev/null)
else
# find do not use its own shell exec
# find does not use its own shell exec
# it uses execvp(). in musl libc it does not call shell, in glibc it DOES call /bin/sh
# that's why prefer bash if present
# that's why prefer bash or zsh if present. otherwise it's our last chance
out=$(echo 0.0.0.0 | find "$dir" -maxdepth 1 -name ip2net -exec {} \; 2>/dev/null)
fi
[ -n "$out" ]