1 files changed, 68 insertions, 0 deletions
diff --git a/tests/tail-2/inotify-rotate.sh b/tests/tail-2/inotify-rotate.sh
new file mode 100755
index 000000000..311633a84
--- /dev/null
+++ b/tests/tail-2/inotify-rotate.sh
@@ -0,0 +1,68 @@
+#!/bin/sh
+# ensure that tail -F handles rotation
+
+# Copyright (C) 2009-2012 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/>.
+
+if test "$VERBOSE" = yes; then
+  set -x
+  tail --version
+fi
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+expensive_
+
+# Wait several seconds for grep REGEXP FILE to succeed.
+# Usage: grep_timeout REGEXP FILE
+grep_timeout()
+{
+    local j
+    for j in $(seq 150); do
+        grep $1 $2 > /dev/null && return 0
+        sleep 0.1
+    done
+    return 1
+}
+
+# For details, see
+# http://lists.gnu.org/archive/html/bug-coreutils/2009-11/msg00213.html
+
+# Perform at least this many iterations, because on multi-core systems
+# the offending sequence of events can be surprisingly uncommon.
+for i in $(seq 50); do
+    echo $i
+    rm -rf k x out
+    # Normally less than a second is required here, but with heavy load
+    # and a lot of disk activity, even 20 seconds is insufficient, which
+    # leads to this timeout killing tail before the "ok" is written below.
+    :>k && :>x && timeout 40 tail -F k > out 2>&1 &
+    pid=$!
+    sleep .1
+    echo b > k;
+    # wait for b to appear in out
+    grep_timeout b out || fail_ failed to find b in out
+    while :; do grep b out > /dev/null && break; done
+    mv x k
+    # wait for tail to detect the rename
+    grep_timeout tail: out || { cat out; fail_ failed to detect rename; }
+    echo ok >> k
+    found=0
+    # wait up to 10 seconds for "ok" to appear in out
+    grep_timeout ok out && found=1
+    kill $pid
+    test $found = 0 && { cat out; fail_ failed to detect echoed '"ok"'; }
+done
+
+Exit $fail