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-rwxr-xr-xsrc/grep/tests/in-eq-out-infloop41
1 files changed, 41 insertions, 0 deletions
diff --git a/src/grep/tests/in-eq-out-infloop b/src/grep/tests/in-eq-out-infloop
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+++ b/src/grep/tests/in-eq-out-infloop
@@ -0,0 +1,41 @@
+#!/bin/sh
+# Demonstrate the disk-filling infloop when redirecting to an input file.
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+require_timeout_
+
+# Use an input file large enough that the problem is reproducible in spite
+# of buffering effects. Just larger than 256KB should be adequate.
+v=$(printf %063d 0)'
+'
+# 64 * 2^12 = 256k
+for i in 1 2 3 4 5 6 7 8 9 10 11 12; do
+ v="$v$v"
+done
+
+echo "$v" > out || framework_failure_
+
+for arg in out - ''; do
+ # Accommodate both 'out' and '(standard input)', as well as
+ # the multi-byte quoting we see on OS/X-based systems.
+ echo grep: ...: input file is also the output > err.exp || framework_failure_
+
+ # Require an exit status of 2.
+ # grep-2.8 and earlier would infloop with $arg = out.
+ # grep-2.10 and earlier would infloop with $arg = - or $arg = ''.
+ timeout 10 grep 0 $arg < out >> out 2> err; st=$?; test $st = 2 || fail=1
+ sed 's/grep: .*: /grep: ...: /' err > k && mv k err
+ # Normalize the diagnostic prefix from e.g., "/mnt/dir/grep: " to "grep: "
+ sed 's/^[^:]*: /grep: /' err > k && mv k err
+ compare err.exp err || fail=1
+
+ # But with each of the following options it must not exit-2.
+ for i in -q -m1 -l -L; do
+ timeout 10 grep $i 0 $arg < out >> out 2> err; st=$?
+ test $st = 2 && fail=1
+ done
+
+ timeout 10 grep -2 0 $arg < out >> out 2> err; st=$?
+ test $st = 2 || fail=1
+done
+
+Exit $fail