1 files changed, 67 insertions, 0 deletions
diff --git a/tests/misc/cut-huge-range.sh b/tests/misc/cut-huge-range.sh
new file mode 100755
index 0000000..dae2632
--- /dev/null
+++ b/tests/misc/cut-huge-range.sh
@@ -0,0 +1,67 @@
+#!/bin/sh
+# Ensure that cut does not allocate mem for large ranges
+
+# Copyright (C) 2012-2020 Free Software Foundation, Inc.
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src
+print_ver_ cut
+getlimits_
+
+vm=$(get_min_ulimit_v_ returns_ 0 cut -b1 /dev/null) \
+  || skip_ "this shell lacks ulimit support"
+
+# sed script to subtract one from the input.
+# Each input line should consist of a positive decimal number.
+# Each output line's number is one less than the input's.
+# There's no limit (other than line length) on the number's magnitude.
+subtract_one='
+  s/$/@/
+  : again
+  s/0@/@9/
+  s/1@/0/
+  s/2@/1/
+  s/3@/2/
+  s/4@/3/
+  s/5@/4/
+  s/6@/5/
+  s/7@/6/
+  s/8@/7/
+  s/9@/8/
+  t again
+'
+
+# Ensure we can cut up to our sentinel value.
+# Don't use expr to subtract one,
+# since UINTMAX_MAX may exceed its maximum value.
+CUT_MAX=$(echo $UINTMAX_MAX | sed "$subtract_one")
+
+# From coreutils-8.10 through 8.20, this would make cut try to allocate
+# a 256MiB bit vector.
+(ulimit -v $vm && cut -b$CUT_MAX- /dev/null > err 2>&1) || fail=1
+
+# Up to and including coreutils-8.21, cut would allocate possibly needed
+# memory upfront.  Subsequently extra memory is no longer needed.
+(ulimit -v $vm && cut -b1-$CUT_MAX /dev/null >> err 2>&1) || fail=1
+
+# Explicitly disallow values above CUT_MAX
+(ulimit -v $vm && returns_ 1 cut -b$UINTMAX_MAX /dev/null 2>/dev/null) ||
+  fail=1
+(ulimit -v $vm && returns_ 1 cut -b$UINTMAX_OFLOW /dev/null 2>/dev/null) ||
+  fail=1
+
+compare /dev/null err || fail=1
+
+Exit $fail