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