1 files changed, 69 insertions, 0 deletions
diff --git a/tests/du/2g.sh b/tests/du/2g.sh
new file mode 100755
index 000000000..96cf62d7c
--- /dev/null
+++ b/tests/du/2g.sh
@@ -0,0 +1,69 @@
+#!/bin/sh
+# Ensure that du can handle a 2GB file (i.e., a file of size 2^31 bytes)
+# Before coreutils-5.93, on systems with a signed, 32-bit stat.st_blocks
+# one of du's computations would overflow.
+
+# Copyright (C) 2005-2012 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 <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+print_ver_ du
+
+# Creating a 2GB file counts as 'very expensive'.
+very_expensive_
+
+
+# Get number of free kilobytes on current partition, so we can
+# skip this test if there is insufficient free space.
+
+# This technique relies on the fact that the 'Available' kilobyte
+# count is the number just before the one with a trailing '%'.
+free_kb=$(df -kP .|tail -1|sed 's/ [0-9][0-9]*%.*//;s/ *$//;s/.* //')
+case "$free_kb" in
+  [0-9]*) ;;
+  *) skip_ "invalid size from df: $free_kb";;
+esac
+
+# Require about 3GB free.
+min_kb=3000000
+test $min_kb -lt $free_kb ||
+{
+  skip_ \
+    "too little free space on current partition: $free_kb (need $min_kb KB)"
+}
+
+big=big
+rm -f $big
+test -t 1 || printf 'creating a 2GB file...\n'
+for i in $(seq 100); do
+  # Note: 2147483648 == 2^31. Print floor(2^31/100) per iteration.
+  printf %21474836s x >> $big || fail=1
+  # On the final iteration, append the remaining 48 bytes.
+  test $i = 100 && { printf %48s x >> $big || fail=1; }
+  test -t 1 && printf 'creating a 2GB file: %d%% complete\r' $i
+done
+echo
+
+du -k $big > out1 || fail=1
+rm -f $big
+sed 's/^2[0-9][0-9][0-9][0-9][0-9][0-9]	'$big'$/~2M/' out1 > out
+
+cat <<\EOF > exp || fail=1
+~2M
+EOF
+
+compare exp out || fail=1
+
+Exit $fail