Chet Ramey schrieb:
Bernd Eggink wrote:
prompt: CLUSTER='1 2'; echo ${CLUSTER/${HOSTNAME/.*}}
output: -bash: ${HOSTNAME: bad substitution
Apparently bash interprets this as ${parameter/pattern/string}
where pattern = ${HOSTNAME. Looks like a bug; it works in ksh.
That is, in fact, what is happening. I'm not sure you can call it
a bug, though -- bash is behaving exactly as documented.
Where exactly is that documented? The only statement I can find in the
documentation referring to this problem is:
"When braces are used, the matching ending brace is the first `}' not
escaped by a backslash or within a quoted string, and not
within an embedded arithmetic expansion, command substitution, or
parameter expansion."
I may be wrong, but to me this means that the first opening brace
matches the last closing one, and that the token ${HOSTNAME/.*} is a
correct parameter expansion.
Bernd
--
Bernd Eggink
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http://sudrala.de