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Message |
simargl
Joined: 11 Feb 2013
Posts: 414
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 Posted: Thu 14 Mar 2013, 08:56 Post subject:
 Problem with positional parameters (solved) |
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Im spkg package manager I have functions for installing and removing packages
| Code: | install_package() {
.........
}
remove_package() {
..........
} |
At the end of that script among others are these two
| Code: | case "$1" in
install|-i)
PKG="$@"
install_package ;;
remove|-r)
PKG="$@"
remove_package ;;
esac |
Problem is that -i (or -r) are picked as part of $PKG variable and returned error is "-i does not exist"
I can't find solution for PKG to be $2 $3... and anything after that (Not $1, because it is taken).
I hope you could understand this.
Last edited by simargl on Thu 14 Mar 2013, 13:24; edited 2 times in total
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SFR
Joined: 26 Oct 2011
Posts: 573
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| Posted: Thu 14 Mar 2013, 10:27 Post subject:
Re: Problem with positional parameters |
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How about this:
| Code: | case "$1" in
install|-i)
shift
PKG="$@"
install_package ;;
remove|-r)
shift
PKG="$@"
remove_package ;;
esac |
Greetings!
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simargl
Joined: 11 Feb 2013
Posts: 414
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| Posted: Thu 14 Mar 2013, 12:18 Post subject:
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Thanks, shift 1 solved it! 
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seaside
Joined: 11 Apr 2007
Posts: 841
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| Posted: Thu 14 Mar 2013, 12:37 Post subject:
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simargl,
PKG="$2" will set the second command line parameter.
"$@" means the entire command line arguments.
Cheers,
s
(I guess you could mark this thread "Solved")
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simargl
Joined: 11 Feb 2013
Posts: 414
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| Posted: Thu 14 Mar 2013, 13:23 Post subject:
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| seaside wrote: | PKG="$2" will set the second command line parameter.
"$@" means the entire command line arguments. |
I know that, but needed was $2 and everything after ("$@" would take $1 also), and Yes sfr solved it!
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seaside
Joined: 11 Apr 2007
Posts: 841
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| Posted: Thu 14 Mar 2013, 17:01 Post subject:
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| simargl wrote: | | seaside wrote: | PKG="$2" will set the second command line parameter.
"$@" means the entire command line arguments. |
I know that, but needed was $2 and everything after ("$@" would take $1 also), and Yes sfr solved it! |
simargl,
Yes, I see now, you wanted to process an unknown quantity of command line parameters (packages) after determining the first parameter (-i or -r). "Shift" commnand is the way to do that as it allows a repeated use of $1 in a while loop.
Cheers,
s
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