* tests/tail-2/infloop-1: Sleep 3 seconds, not 1, but in increments
of 0.1 second. Before, this test would fail ~1 time in 20 via
"make -j9 check" on a quad-core system.
Correct comment.
yes_pid=$!
while :; do
test -s t && break
+ sleep .1
done
tail -n 1 t &
tail_pid=$!
kill $yes_pid
# This test is racy, and can fail under unusual circumstances.
-# On a busy system, "yes" will fail to write
-# (and hence fail to be killed by SIGPIPE) in that 1-second interval.
+# On a very busy system, tail will fail to notice that $yes_pid is gone.
# Then the following kill will succeed and cause this test to fail.
-sleep 1
+
+# Wait for up to 3 seconds for tail to detect the death of $yes_pid.
+for i in $(seq 30); do
+ kill -0 $tail_pid || break
+ echo sleep 0.1s
+ sleep .1
+done
fail=0
kill $tail_pid && fail=1 || :