- # Turn the -f option into an -e option by copying the file's
- # contents into OPTARG.
- case $optarg in
- (" '-'" | " '/dev/stdin'" | " '/dev/fd/0'")
- option=-e
- optarg=" '"$(sed "$escape") || exit 2;;
- esac
+ # Similarly if it is not a regular file, since it might be read repeatedly.
+ # In either of these two cases, copy the pattern into a temporary file,
+ # and use that file instead. The pattern might contain null bytes,
+ # so we cannot simply switch to -e here.
+ if case $optarg in
+ (" '-'" | " '/dev/stdin'" | " '/dev/fd/0'")
+ :;;
+ (*)
+ eval "test ! -f$optarg";;
+ esac
+ then
+ if test -n "$pattmp"; then
+ eval "cat --$optarg" >>"$pattmp" || exit 2
+ continue
+ fi
+ trap '
+ test -n "$pattmp" && rm -f "$pattmp"
+ (exit 2); exit 2
+ ' HUP INT PIPE TERM 0
+ case $TMPDIR in
+ / | /*/) ;;
+ /*) TMPDIR=$TMPDIR/;;
+ *) TMPDIR=/tmp/;;
+ esac
+ if type mktemp >/dev/null 2>&1; then
+ pattmp=$(mktemp "${TMPDIR}zgrepXXXXXXXXX") || exit 2
+ else
+ set -C
+ pattmp=${TMPDIR}zgrep$$
+ fi
+ eval "cat --$optarg" >"$pattmp" || exit 2
+ optarg=' "$pattmp"'
+ fi