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William
*nix forums Guru Wannabe
Joined: 04 Apr 2005
Posts: 196
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 Posted: Wed Jul 19, 2006 8:04 pm Post subject:
Re: Interpret variables in strings in ksh
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<greenhakan@gmail.com> wrote in message
news:1153317834.681930.8790@i42g2000cwa.googlegroups.com...
| Quote: | Hi all,
in a ksh script I want to be able to interpret strings containing
some kind of variables.
The syntax of such a 'variable' is not so important, let's assume
that a variable looks like this: ?var?
So if the string looks like
blabla/something/?var1?/somethingelse/?var2?/etc
I want to be able to extract the strings 'var1' and 'var2'.
The string can contain zero or more of these 'variables', and
there can be many variables in sequence: bla?var1??var2?bla
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This doesn't sound like interpreting, just string extraction.
Here's a hack that seems to work (probably has some issues,
I had to cheat and append ?? to the input string to get it to
drop the trailing /etc, for example). Just a starting point
for you:
#!/bin/sh
testStr='blabla/something/?var1?/somethingelse/?var2?/etc'
set -- `echo "$testStr??" | sed -e 's|[^?]*?\([^?]*\)?|\1 |g'`
echo "String: $testStr"
echo "String contains $# variables:"
while [ $# -gt 0 ] ; do
echo " $1"
shift
done
-Wm |
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John DuBois
*nix forums addict
Joined: 30 Mar 2005
Posts: 61
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| Posted: Wed Jul 19, 2006 3:19 pm Post subject:
Re: Interpret variables in strings in ksh
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In article <1153317834.681930.8790@i42g2000cwa.googlegroups.com>,
<greenhakan@gmail.com> wrote:
| Quote: | Hi all,
in a ksh script I want to be able to interpret strings containing
some kind of variables.
The syntax of such a 'variable' is not so important, let's assume that
a variable looks like this: ?var?
So if the string looks like
blabla/something/?var1?/somethingelse/?var2?/etc
I want to be able to extract the strings 'var1' and 'var2'.
The string can contain zero or more of these 'variables', and there can
be many variables in sequence: bla?var1??var2?bla
Any ideas?
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j=bla?var1??var2?bla
oIFS=$IFS
IFS=\?
set -- $j
IFS=$oIFS
while (( $# > 1 )); do
print -- "$2"
shift 2
done
John
--
John DuBois spcecdt@armory.com KC6QKZ/AE http://www.armory.com/~spcecdt/ |
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greenhakan@gmail.com
*nix forums beginner
Joined: 19 Jul 2006
Posts: 1
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| Posted: Wed Jul 19, 2006 2:03 pm Post subject:
Interpret variables in strings in ksh
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Hi all,
in a ksh script I want to be able to interpret strings containing
some kind of variables.
The syntax of such a 'variable' is not so important, let's assume that
a variable looks like this: ?var?
So if the string looks like
blabla/something/?var1?/somethingelse/?var2?/etc
I want to be able to extract the strings 'var1' and 'var2'.
The string can contain zero or more of these 'variables', and there can
be many variables in sequence: bla?var1??var2?bla
Any ideas?
Regards, Håkan |
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