Fix bzgrep so it doesn't always return a 0 exit code with multiple archives
The bzgrep wrapper always returns 0 as exit code when working on
multiple archives, even when the pattern is not found.
Fix from openSUSE by Kristýna Streitová <kstreitova@suse.com>
https://bugzilla.suse.com/970260
diff --git a/bzgrep b/bzgrep
old mode 100644
new mode 100755
index 5080afd..0314ca6
--- a/bzgrep
+++ b/bzgrep
@@ -65,8 +65,20 @@
else
j=$(echo "$i" | sed 's/\\/&&/g;s/|/\\&/g;s/&/\\&/g')
j=`printf "%s" "$j" | tr '\n' ' '`
- bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${j}:|"
- r=$?
+ # A trick adapted from
+ # https://groups.google.com/forum/#!original/comp.unix.shell/x1345iu10eg/Nn1n-1r1uU0J
+ # that has the same effect as the following bash code:
+ # bzip2 -cdfq "$i" | $grep $opt "$pat" | sed "s|^|${j}:|"
+ # r=${PIPESTATUS[1]}
+ exec 3>&1
+ eval `
+ exec 4>&1 >&3 3>&-
+ {
+ bzip2 -cdfq "$i" 4>&-
+ } | {
+ $grep $opt "$pat" 4>&-; echo "r=$?;" >&4
+ } | sed "s|^|${j}:|"
+ `
fi
test "$r" -ne 0 && res="$r"
done
