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c1564db05d
Although "--" historically has not been required to be recognized for certain special builtins that do not take options in POSIX, some other implementations recognize options for them, requiring scripts to use "--" or avoid operands starting with "-". Operands starting with "-" can be avoided with eval by prepending a space, and cannot occur with break, continue, exit, return and shift as they only take numbers, nor with times as it does not take operands. With . and exec, avoiding "-" is not so easy as it may require reimplementing the PATH search; therefore the current proposal for POSIX is to require recognition of "--" for them. We continue to accept other strings starting with "-" as operands to . and exec, and also "--" if it is alone to . (which would otherwise be invalid anyway).
21 lines
360 B
Text
21 lines
360 B
Text
# $FreeBSD$
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failures=
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failure() {
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echo "Error at line $1" >&2
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failures=x$failures
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}
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T=$(mktemp -d ${TMPDIR:-/tmp}/sh-test.XXXXXX) || exit
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trap 'rm -rf $T' 0
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cd $T || exit 3
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unset x
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echo 'x=2' >testscript
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. -- ./testscript
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[ "$x" = 2 ] || failure $LINENO
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cd / || exit 3
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x=1
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PATH=$T:$PATH . -- testscript
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[ "$x" = 2 ] || failure $LINENO
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test -z "$failures"
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