Re: shell command line argument + parsing function
2009/8/31 Stefan Miklosovic :
> hi,
>
> assuming I execute shell script like this
>
> $ ./script -c "hello world"
>
> I want to save "hello world" string to variable COMMENT in shell script.
>
> code:
>
> #!/bin/sh
>
> parse_cmdline() {
> while [ $# -gt 0 ]; do
> case "$1" in
> -c)
> shift
> COMMENT="$1"
> ;;
> esac
> shift
> done
> }
>
> parse_cmdline $*
>
> echo $COMMENT
>
> exit 0
How about getopts builtin, so you can use:
./script -c "hello world" or
./script -c"hello world" or
while getopts c: f; do
case $f in
c)
COMMENT=$OPTARG
;;
\?)
echo 'usage: $0 [-c string]'
exit 1
;;
esac
done
echo "COMMENT: $COMMENT"
--
Artis Caune
Everything should be made as simple as possible, but not simpler.
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Re: shell command line argument + parsing function
On Mon, Aug 31, 2009 at 01:07:36AM +0200, Stefan Miklosovic wrote:
> hi,
>
> assuming I execute shell script like this
>
> $ ./script -c "hello world"
>
> I want to save "hello world" string to variable COMMENT in shell script.
>
> code:
>
> #!/bin/sh
>
> parse_cmdline() {
> while [ $# -gt 0 ]; do
> case "$1" in
> -c)
> shift
> COMMENT="$1"
> ;;
> esac
> shift
> done
> }
>
> parse_cmdline $*
>
> echo $COMMENT
>
> exit 0
>
> but that only write out "hello". I tried to change $* to $@, nothing
> changed.
But if you use "$@" (with the quote marks) instead it should work fine.
For further explanation please read the sh(1) man page where it explains the
special parameters $* and $@, while paying special attention to how they
expand when used within double-quotes.
>
> It is interesting, that if I dont put "while" loop into function
> parse_cmdline,
> and do echo $COMMENT, it writes "hello world".
>
> I WANT that function style. How to do it ?
>
> thank you
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--
Erik Trulsson
ertr1...@student.uu.se
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Re: shell command line argument + parsing function
hehe :D
easy as hell, one has to enclose argument of parse_cmdline into brackets :)
parse_cmdline "$@"
sorry for noise
On Mon, Aug 31, 2009 at 1:07 AM, Stefan Miklosovic <
miklosovic.free...@gmail.com> wrote:
> hi,
>
> assuming I execute shell script like this
>
> $ ./script -c "hello world"
>
> I want to save "hello world" string to variable COMMENT in shell script.
>
> code:
>
> #!/bin/sh
>
> parse_cmdline() {
> while [ $# -gt 0 ]; do
> case "$1" in
> -c)
> shift
> COMMENT="$1"
> ;;
> esac
> shift
> done
> }
>
> parse_cmdline $*
>
> echo $COMMENT
>
> exit 0
>
> but that only write out "hello". I tried to change $* to $@, nothing
> changed.
>
> It is interesting, that if I dont put "while" loop into function
> parse_cmdline,
> and do echo $COMMENT, it writes "hello world".
>
> I WANT that function style. How to do it ?
>
> thank you
>
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Re: shell command line argument + parsing function
On Mon, Aug 31, 2009, Stefan Miklosovic wrote:
>hi,
>
>assuming I execute shell script like this
>
>$ ./script -c "hello world"
>
>I want to save "hello world" string to variable COMMENT in shell script.
>
>code:
>
>#!/bin/sh
>
>parse_cmdline() {
>while [ $# -gt 0 ]; do
>case "$1" in
>-c)
>shift
>COMMENT="$1"
>;;
>esac
>shift
>done
>}
>
>parse_cmdline $*
>
>echo $COMMENT
>
>exit 0
>
>but that only write out "hello". I tried to change $* to $@, nothing
>changed.
Did you put $@ in quotes? That is parse_cmdline "$@". I haven't
tried this in calling functions in scripts, but use it frequently
when calling scripts from other scripts. I would probably use
something like:
for arg in "$@"; do
dosomething "$arg"
done
Bill
--
INTERNET: b...@celestial.com Bill Campbell; Celestial Software LLC
URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way
Voice: (206) 236-1676 Mercer Island, WA 98040-0820
Fax:(206) 232-9186 Skype: jwccsllc (206) 855-5792
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-- John C. Dvorak
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shell command line argument + parsing function
hi,
assuming I execute shell script like this
$ ./script -c "hello world"
I want to save "hello world" string to variable COMMENT in shell script.
code:
#!/bin/sh
parse_cmdline() {
while [ $# -gt 0 ]; do
case "$1" in
-c)
shift
COMMENT="$1"
;;
esac
shift
done
}
parse_cmdline $*
echo $COMMENT
exit 0
but that only write out "hello". I tried to change $* to $@, nothing
changed.
It is interesting, that if I dont put "while" loop into function
parse_cmdline,
and do echo $COMMENT, it writes "hello world".
I WANT that function style. How to do it ?
thank you
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