Re: [gentoo-user] [OT] bash script error
Hello,
On Mon, 09 May 2011, Kevin McCarthy wrote:
On Mon, May 09, 2011 at 01:44:58PM +0800, Xi Shen wrote:
It is not specific to Gentoo. But do not know where to search or post it :)
My script looks like:
url=http://mypage;
curl_opts=-x ''
curl $url -d \mydata\ $curl_opts
If I execute it, I got an error from curl, saying it cannot resolve
the proxy ''.
While bash arrays probably aren't required for this, the following seems
to work OK:
When using the bash anyway, arrays are the thing to use!
curl_opts=(-x )
curl $url -d \mydata\ ${curl_opts[@]}
But I'm sure there's a quotes-only solution, too.
I can't find one. Seems to be some curl weirdness layered on top. Even
with
strace -eexecve curl $url -d mydata $curl_opts
and (quoted, escaped etc.) variations thereof, I haven't found a
version that works.
If you want to just DL some stuff, with POST, no proxy, why not use
wget?
wget --post-data=mydata --no-proxy $url
(and if you want the result on stdout, just add '-O -', i.e.:
wget --post-data=mydata --no-proxy -O - $url
). Or if you want the options as such:
url=...
wget_opts=--no-proxy -O - ### special chars need to be
### once-escaped when using
### options/arguments with spaces,
### quotes etc.
post_data=foo=bar
set -x
wget ${wget_opts} --post-data=$post_data $url
### no quotes here, or use an array!
HTH,
-dnh
--
Doesn't it bother you, that we have to search for intelligent life
--- OUT THERE??
Re: [gentoo-user] [OT] bash script error
Hello, On Mon, 09 May 2011, JDM wrote: Do as you tried first, but add an eval: eval curl $url -d \mydata\ $curl_opts eval is evil ... -dnh -- Being disintegrated makes me ve-ry an-gry! huff, huff
Re: [gentoo-user] [OT] bash script error
Hi, have you tried /bin/bash -x your.script.sh - see what get's expanded ? Nils 2011/5/9 Xi Shen davidshe...@googlemail.com I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help.
Re: [gentoo-user] [OT] bash script error
yes, you are right. + curl_opts='-x '\'''\''' the -x '' expands to too many quotes. I tried to replace the double-quotes to single-quotes, but still not working. any idea how to fix this? On Mon, May 9, 2011 at 2:43 PM, Nils Andresen n...@nils-andresen.de wrote: Hi, have you tried /bin/bash -x your.script.sh - see what get's expanded ? Nils 2011/5/9 Xi Shen davidshe...@googlemail.com I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/
Re: [gentoo-user] [OT] bash script error
On Mon, May 9, 2011 at 9:43 AM, Nils Andresen n...@nils-andresen.de wrote: Hi, have you tried /bin/bash -x your.script.sh - see what get's expanded ? Nils 2011/5/9 Xi Shen davidshe...@googlemail.com I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. You need to change: - curl_opts=-x '' + curl_opts=-x Run your program with bash -x as Nils said, and you will see the expansion. Kfir
Re: [gentoo-user] [OT] bash script error
yes, i use the '-x' option, and i can see the expansion now. and i found there are too many quotes. i tried curl_opts=-x , does not work. On Mon, May 9, 2011 at 3:52 PM, Kfir Lavi lavi.k...@gmail.com wrote: On Mon, May 9, 2011 at 9:43 AM, Nils Andresen n...@nils-andresen.de wrote: Hi, have you tried /bin/bash -x your.script.sh - see what get's expanded ? Nils 2011/5/9 Xi Shen davidshe...@googlemail.com I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. You need to change: - curl_opts=-x '' + curl_opts=-x Run your program with bash -x as Nils said, and you will see the expansion. Kfir -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/
Re: [gentoo-user] [OT] bash script error
if i use -x '', or -x , it expands to -x. the quotes are removed as they are empty. if i use -x \'\', the expanded quotes are quoted again...resulting too many quotes it is driving me crazy o_O! please help. On Mon, May 9, 2011 at 4:14 PM, Xi Shen davidshe...@googlemail.com wrote: yes, i use the '-x' option, and i can see the expansion now. and i found there are too many quotes. i tried curl_opts=-x , does not work. On Mon, May 9, 2011 at 3:52 PM, Kfir Lavi lavi.k...@gmail.com wrote: On Mon, May 9, 2011 at 9:43 AM, Nils Andresen n...@nils-andresen.de wrote: Hi, have you tried /bin/bash -x your.script.sh - see what get's expanded ? Nils 2011/5/9 Xi Shen davidshe...@googlemail.com I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. You need to change: - curl_opts=-x '' + curl_opts=-x Run your program with bash -x as Nils said, and you will see the expansion. Kfir -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/ -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/
Re: [gentoo-user] [OT] bash script error
(Forgive my top-posting) try: curl_opts=-x \'\' Rgds, On 2011-05-09, Xi Shen davidshe...@googlemail.com wrote: yes, i use the '-x' option, and i can see the expansion now. and i found there are too many quotes. i tried curl_opts=-x , does not work. On Mon, May 9, 2011 at 3:52 PM, Kfir Lavi lavi.k...@gmail.com wrote: On Mon, May 9, 2011 at 9:43 AM, Nils Andresen n...@nils-andresen.de wrote: Hi, have you tried /bin/bash -x your.script.sh - see what get's expanded ? Nils 2011/5/9 Xi Shen davidshe...@googlemail.com I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. You need to change: - curl_opts=-x '' + curl_opts=-x Run your program with bash -x as Nils said, and you will see the expansion. Kfir -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/ -- -- Pandu E Poluan - IT Optimizer My website: http://pandu.poluan.info/
Re: [gentoo-user] [OT] bash script error
(Again, sorry for top-posting) BTW, there are lots of bash gurus in stackovervlow.com. My handle there is 'pepoluan'. Rgds, On 2011-05-09, Xi Shen davidshe...@googlemail.com wrote: It is not specific to Gentoo. But do not know where to search or post it :) My script looks like: url=http://mypage; curl_opts=-x '' curl $url -d \mydata\ $curl_opts If I execute it, I got an error from curl, saying it cannot resolve the proxy ''. But If I modify the script to: url=http://mypage; curl $url -d \mydata\ -x '' It works fine. I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/ -- -- Pandu E Poluan - IT Optimizer My website: http://pandu.poluan.info/
Re: [gentoo-user] [OT] bash script error
i tried that already. not working. i will try the stackoverflow.com. thanks On Mon, May 9, 2011 at 4:31 PM, Pandu Poluan pa...@poluan.info wrote: (Again, sorry for top-posting) BTW, there are lots of bash gurus in stackovervlow.com. My handle there is 'pepoluan'. Rgds, On 2011-05-09, Xi Shen davidshe...@googlemail.com wrote: It is not specific to Gentoo. But do not know where to search or post it :) My script looks like: url=http://mypage; curl_opts=-x '' curl $url -d \mydata\ $curl_opts If I execute it, I got an error from curl, saying it cannot resolve the proxy ''. But If I modify the script to: url=http://mypage; curl $url -d \mydata\ -x '' It works fine. I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/ -- -- Pandu E Poluan - IT Optimizer My website: http://pandu.poluan.info/ -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/
Re: [gentoo-user] [OT] bash script error
On Mon, May 9, 2011 at 12:00 PM, Xi Shen davidshe...@googlemail.com wrote: i tried that already. not working. i will try the stackoverflow.com. thanks On Mon, May 9, 2011 at 4:31 PM, Pandu Poluan pa...@poluan.info wrote: (Again, sorry for top-posting) BTW, there are lots of bash gurus in stackovervlow.com. My handle there is 'pepoluan'. Rgds, On 2011-05-09, Xi Shen davidshe...@googlemail.com wrote: It is not specific to Gentoo. But do not know where to search or post it :) My script looks like: url=http://mypage; curl_opts=-x '' curl $url -d \mydata\ $curl_opts If I execute it, I got an error from curl, saying it cannot resolve the proxy ''. But If I modify the script to: url=http://mypage; curl $url -d \mydata\ -x '' It works fine. I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/ -- -- Pandu E Poluan - IT Optimizer My website: http://pandu.poluan.info/ -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/ I have replied you before. What I have sent you is the solution to your problems. Try to run what I told you. I ran it successfully on my comp. curl_opts=-x Kfir
Re: [gentoo-user] [OT] bash script error
Kfir Lavi writes: On Mon, May 9, 2011 at 12:00 PM, Xi Shen davidshe...@googlemail.com wrote: On Mon, May 9, 2011 at 4:31 PM, Pandu Poluan pa...@poluan.info wrote: On 2011-05-09, Xi Shen davidshe...@googlemail.com wrote: My script looks like: url=http://mypage; curl_opts=-x '' curl $url -d \mydata\ $curl_opts If I execute it, I got an error from curl, saying it cannot resolve the proxy ''. But If I modify the script to: url=http://mypage; curl $url -d \mydata\ -x '' It works fine. I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. Do as you tried first, but add an eval: eval curl $url -d \mydata\ $curl_opts I have replied you before. What I have sent you is the solution to your problems. Try to run what I told you. I ran it successfully on my comp. curl_opts=-x This gives a command not found error, as bash tries to execute the empty command . Are you using another shell? Wonko
Re: [gentoo-user] [OT] bash script error
He --Original Message-- From: Alex Schuster To: gentoo-user@lists.gentoo.org ReplyTo: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] [OT] bash script error Sent: 9 May 2011 11:36 Kfir Lavi writes: On Mon, May 9, 2011 at 12:00 PM, Xi Shen davidshe...@googlemail.com wrote: On Mon, May 9, 2011 at 4:31 PM, Pandu Poluan pa...@poluan.info wrote: On 2011-05-09, Xi Shen davidshe...@googlemail.com wrote: My script looks like: url=http://mypage; curl_opts=-x '' curl $url -d \mydata\ $curl_opts If I execute it, I got an error from curl, saying it cannot resolve the proxy ''. But If I modify the script to: url=http://mypage; curl $url -d \mydata\ -x '' It works fine. I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. Do as you tried first, but add an eval: eval curl $url -d \mydata\ $curl_opts I have replied you before. What I have sent you is the solution to your problems. Try to run what I told you. I ran it successfully on my comp. curl_opts=-x This gives a command not found error, as bash tries to execute the empty command . Are you using another shell? Wonko Sent from my BlackBerry® wireless device
Re: [gentoo-user] [OT] bash script error
On Mon, May 9, 2011 at 1:36 PM, Alex Schuster wo...@wonkology.org wrote: Kfir Lavi writes: On Mon, May 9, 2011 at 12:00 PM, Xi Shen davidshe...@googlemail.com wrote: On Mon, May 9, 2011 at 4:31 PM, Pandu Poluan pa...@poluan.info wrote: On 2011-05-09, Xi Shen davidshe...@googlemail.com wrote: My script looks like: url=http://mypage; curl_opts=-x '' curl $url -d \mydata\ $curl_opts If I execute it, I got an error from curl, saying it cannot resolve the proxy ''. But If I modify the script to: url=http://mypage; curl $url -d \mydata\ -x '' It works fine. I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. Do as you tried first, but add an eval: eval curl $url -d \mydata\ $curl_opts I have replied you before. What I have sent you is the solution to your problems. Try to run what I told you. I ran it successfully on my comp. curl_opts=-x This gives a command not found error, as bash tries to execute the empty command . Are you using another shell? Wonko Sorry, I have put www.google.com in th url, so got the page, and didn't notice the error. hehe Kfir
Re: [gentoo-user] [OT] bash script error
Well, I saw a lot of advice on this but no real solution - just some debugging
help.
At least from my own experience with Bash Scripting, I find that you can never
use enough braces when referencing variables.
So, the script should read:
url=http://mypage;
curl_opts=-x
curl ${url} -d \mydata\ ${curl_opts}
I would probably even go one further and use quotes in the final line as well,
thus producing:
curl ${url}-d \mydata\ ${curl_opts}
Please note that the single and double quotes have meanings as far as expansion.
Also, the guys on IRC (#bash) are quite helpful - a great resource in addition
to 'man bash'.
$0.02
Ben
- Original Message
From: Xi Shen davidshe...@googlemail.com
To: gentoo-user gentoo-user@lists.gentoo.org
Sent: Mon, May 9, 2011 1:44:58 AM
Subject: [gentoo-user] [OT] bash script error
It is not specific to Gentoo. But do not know where to search or post it :)
My script looks like:
url=http://mypage;
curl_opts=-x ''
curl $url -d \mydata\ $curl_opts
If I execute it, I got an error from curl, saying it cannot resolve
the proxy ''.
But If I modify the script to:
url=http://mypage;
curl $url -d \mydata\ -x ''
It works fine.
I guess there's something wrong with the argument expansion. Just do
not know how to fix it. Please help.
--
Best Regards,
Xi Shen (David)
http://twitter.com/davidshen84/
Re: [gentoo-user] [OT] bash script error
On Mon, May 09, 2011 at 01:44:58PM +0800, Xi Shen wrote:
It is not specific to Gentoo. But do not know where to search or post it :)
My script looks like:
url=http://mypage;
curl_opts=-x ''
curl $url -d \mydata\ $curl_opts
If I execute it, I got an error from curl, saying it cannot resolve
the proxy ''.
While bash arrays probably aren't required for this, the following seems
to work OK:
curl_opts=(-x )
curl $url -d \mydata\ ${curl_opts[@]}
But I'm sure there's a quotes-only solution, too.
--
Kevin McCarthy sign...@gentoo.org
[gentoo-user] [OT] bash script error
It is not specific to Gentoo. But do not know where to search or post it :) My script looks like: url=http://mypage; curl_opts=-x '' curl $url -d \mydata\ $curl_opts If I execute it, I got an error from curl, saying it cannot resolve the proxy ''. But If I modify the script to: url=http://mypage; curl $url -d \mydata\ -x '' It works fine. I guess there's something wrong with the argument expansion. Just do not know how to fix it. Please help. -- Best Regards, Xi Shen (David) http://twitter.com/davidshen84/
