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install_bin: prevent bad executable interpretation as a shell script

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bol-van 2022-02-05 21:42:10 +03:00
parent b0170aff1b
commit cc7274ca25
1 changed files with 7 additions and 2 deletions
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9
install_bin.sh
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@ -7,10 +7,15 @@ BINDIR="$EXEDIR/$BINS"
check_dir() check_dir()
{ {
local exe=$BINDIR/$1/ip2net local dir="$BINDIR/$1"
local exe="$dir/ip2net"
local out
if [ -f "$exe" ]; then if [ -f "$exe" ]; then
if [ -x "$exe" ]; then if [ -x "$exe" ]; then
echo 0.0.0.0 | "$exe" 1>/dev/null 2>/dev/null # ash and dash try to execute invalid executables as a script. they interpret binary garbage with possible negative consequences
# find do not use shell exec
out=$(echo 0.0.0.0 | find "$dir" -maxdepth 1 -name ip2net -exec {} \; 2>/dev/null)
[ -n "$out" ]
else else
echo "$exe is not executable. set proper chmod." echo "$exe is not executable. set proper chmod."
return 1 return 1