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#!/bin/sh
# Case-insensitive grep with a 0-size input file would fail in grep up to 2.6.3
. "${srcdir=.}/init.sh"; path_prepend_ ../src
mkdir a || framework_failure
# Lower and upper bound of valid exit status for "grep -f DIR",
# when reading from empty and nonempty files, respectively.
if cat a >/dev/null 2>&1; then
l=1 u=1 L=0 U=1
else
l=2 u=127 L=2 U=127
fi
echo x | grep -f a/; { test $? -ge $L && test $? -le $U; } || fail=1
echo x | grep -if a/; { test $? -ge $L && test $? -le $U; } || fail=1
echo x | grep -Ff a/; { test $? -ge $L && test $? -le $U; } || fail=1
echo x | grep -Fif a/; { test $? -ge $L && test $? -le $U; } || fail=1
grep -f a/ < /dev/null; { test $? -ge $l && test $? -le $u; } || fail=1
grep -if a/ < /dev/null; { test $? -ge $l && test $? -le $u; } || fail=1
grep -Ff a/ < /dev/null; { test $? -ge $l && test $? -le $u; } || fail=1
grep -Fif a/ < /dev/null; { test $? -ge $l && test $? -le $u; } || fail=1
Exit $fail
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