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#!/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
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