Your message dated Fri, 04 Dec 2015 09:35:03 +0000
with message-id <[email protected]>
and subject line Re: Bug#807011: ksh: Conditional variable expansion problem in
while loop
has caused the Debian Bug report #807011,
regarding ksh: Conditional variable expansion problem in while loop
to be marked as done.
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807011: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=807011
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--- Begin Message ---
Package: ksh
Version: 93u+20120801-2
Severity: important
$ for s in '' ba da k mk z; do
sh=${s}sh
echo -n $sh:
seq 4 |${s}sh -c 'unset v; while read n; do [ -n "${v+set}" ] && echo -n "$v
"; v="$n"; done; echo "$v"'
done
sh:1 2 3 4
bash:1 2 3 4
dash:1 2 3 4
ksh:4
mksh:1 2 3 4
zsh:1 2 3 4
`[ -n "${v+set}" ] ` must be true on 2nd iteration and later in all *sh,
but only ksh returns the false on all iteration.
--
-- Name: SATOH Fumiyasu @ OSS Technology Corp. (fumiyas @ osstech co jp)
-- Business Home: http://www.OSSTech.co.jp/
-- GitHub Home: https://GitHub.com/fumiyas/
-- PGP Fingerprint: BBE1 A1C9 525A 292E 6729 CDEC ADC2 9DCA 5E1C CBCA
--- End Message ---
--- Begin Message ---
Satoh,
The problem seems to be that you are using "${v+set}" rather than
"${v}set" .
On 04/12/15 06:22, SATOH Fumiyasu wrote:
Package: ksh
Version: 93u+20120801-2
Severity: important
$ for s in '' ba da k mk z; do
sh=${s}sh
echo -n $sh:
seq 4 |${s}sh -c 'unset v; while read n; do [ -n "${v+set}" ] && echo -n "$v ";
v="$n"; done; echo "$v"'
done
sh:1 2 3 4
bash:1 2 3 4
dash:1 2 3 4
ksh:4
mksh:1 2 3 4
zsh:1 2 3 4
`[ -n "${v+set}" ] ` must be true on 2nd iteration and later in all *sh,
but only ksh returns the false on all iteration.
--- End Message ---
