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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
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# $FreeBSD: release/9.1.0/tools/regression/bin/sh/expansion/length4.0 220655 2011-04-15 15:26:05Z jilles $ # The construct ${#?} is ambiguous in POSIX.1-2008: it could be the length # of $? or it could be $# giving an error in the (impossible) case that it # is not set. # We use the former interpretation; it seems more useful. : [ "${#?}" = 1 ] || echo '${#?} wrong' (exit 42) [ "${#?}" = 2 ] || echo '${#?} wrong'