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authorLasse Collin <lasse.collin@tukaani.org>2022-07-19 00:10:55 +0300
committerLasse Collin <lasse.collin@tukaani.org>2022-07-19 00:10:55 +0300
commita648978b20495b7aa4a8b029c5a810b5ad9d08ff (patch)
tree065748cd674294411531177366ffcaa0ccec261d /src/scripts/xzgrep.in
parentxzgrep: Use grep -H --label when available (GNU, *BSDs). (diff)
downloadxz-a648978b20495b7aa4a8b029c5a810b5ad9d08ff.tar.xz
xzgrep: Make the fix for ZDI-CAN-16587 more robust.
I don't know if this can make a difference in the real world but it looked kind of suspicious (what happens with sed implementations that cannot process very long lines?). At least this commit shouldn't make it worse.
Diffstat (limited to 'src/scripts/xzgrep.in')
-rw-r--r--src/scripts/xzgrep.in5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/scripts/xzgrep.in b/src/scripts/xzgrep.in
index dd0643d6..78f5bd31 100644
--- a/src/scripts/xzgrep.in
+++ b/src/scripts/xzgrep.in
@@ -223,7 +223,10 @@ for i; do
case $i in
(*'
'* | *'&'* | *'\'* | *'|'*)
- i=$(printf '%s\n' "$i" | LC_ALL=C sed 's/[&\|]/\\&/g; $!s/$/\\/');;
+ # If sed fails, set i to a known safe string to ensure that
+ # failing sed didn't create a half-escaped dangerous string.
+ i=$(printf '%s\n' "$i" | LC_ALL=C sed 's/[&\|]/\\&/g; $!s/$/\\/') ||
+ i='(unknown filename):';;
esac
# $i already ends with a colon so don't add it here.