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exiting loop involving read
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From: "Norman H. Azadian" <[EMAIL PROTECTED]>
To: Debian Bug Tracking System <[EMAIL PROTECTED]>
Subject: bash: variables revert to original values when exiting loop involving
read
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Date: Fri, 25 Mar 2005 22:32:12 +0100
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Package: bash
Version: 2.05b-24
Severity: important
The following script illustrates the problem:
#!/bin/sh
val=initial
cat <<-EOF | while read ;do
first line
second line
EOF
val=$REPLY
echo "val is '$val'"
done
echo "final val is '$val'"
When I run this, I get:
val is 'first line'
val is 'second line'
final val is 'initial'
I suspect this only happens with read, but I'm not sure.
-- System Information:
Debian Release: 3.1
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.11A
Locale: LANG=C, LC_CTYPE=C
Versions of packages bash depends on:
ii base-files 3.1.0 Debian base system miscellaneous f
ii libc6 2.3.2.ds1-18 GNU C Library: Shared libraries an
ii libncurses5 5.4-4 Shared libraries for terminal hand
ii passwd 1:4.0.3-30.4 Change and administer password and
-- no debconf information
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From: Matthias Klose <[EMAIL PROTECTED]>
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Date: Fri, 25 Mar 2005 23:29:14 +0100
To: "Norman H. Azadian" <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
Subject: Re: Bug#301433: bash: variables revert to original values when exiting
loop involving read
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Norman H. Azadian writes:
> Package: bash
> Version: 2.05b-24
> Severity: important
>
> The following script illustrates the problem:
>
> #!/bin/sh
>
> val=initial
> cat <<-EOF | while read ;do
> first line
> second line
> EOF
> val=$REPLY
> echo "val is '$val'"
> done
> echo "final val is '$val'"
>
> When I run this, I get:
>
> val is 'first line'
> val is 'second line'
> final val is 'initial'
>
> I suspect this only happens with read, but I'm not sure.
not a bug, the variable is set in another process (while ... done)
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