[arch-general] bash - pathname expansion controls 'set -f' or 'set -o noglob' on broken?
David C. Rankin
drankinatty at suddenlinkmail.com
Fri Aug 13 03:43:46 EDT 2010
On 08/13/2010 02:27 AM, C Anthony Risinger wrote:
> On Fri, Aug 13, 2010 at 2:10 AM, mike rosset<schizoid29 at gmail.com> wrote:
>> Dave you need to quote your variables ie.
>> var="*pacman*"; echo "$var"
>> so printf "Search: %s\n" $myvar should read
>> printf "Search: %s\n" "$myvar"
>> On Thu, Aug 12, 2010 at 11:39 PM, David C. Rankin
>> <drankinatty at suddenlinkmail.com> wrote:
>>> On 08/13/2010 01:32 AM, David C. Rankin wrote:
>>>> On 08/13/2010 01:15 AM, mike rosset wrote:
>>>>> quote command arguments like you would normally do.
>>>>> ie. $ myscript "*pacman*"
>>>> 01:32 nirvana:~/scr/arch/tmp> ./tst.sh "pacman*"
>>>> Search: pacman-foo
>>> I'm sorry, that was a short answer. My thoughts in this situation
>>> were that partial or soft-quoting "" would not offer any additional
>>> protection that full or hard-quoting '' did not already provide. From ABS:
>>> partial quoting [double quote]. "STRING" preserves (from interpretation)
>>> most of the special characters within STRING.
>>> full quoting [single quote]. 'STRING' preserves all special characters
>>> within STRING. This is a stronger form of quoting than "STRING".
>>> I'd run across this a couple of days ago on the pacman -Ss reformat
>>> script work.
> yes what mike said is correct. the best way to remember/catch stuff
> like this, is to always remember that bash variables are almost pure,
> direct "text-replacement"; by this i mean the contents of the variable
> are substituted in place of the variable, and _then_ the expression is
> evaluated. so, in your case, this line:
> printf "Search: %s\n" $myvar
> expanded/substituted as:
> printf "Search: %s\n" pacman*
> which expanded yet again by bash to:
> printf "Search: %s\n" pacman-foo
> before finally being passed to printf().
> C Anthony
Oh 5h17!! (said while wearing the dunce cap). When at first I got stuck on
this, I created a new directory and copied the script into it along with
pacman-foo for testing. I had my editor open and the script up via sftp to the
server. Some idiot never closed the original script and re-opened the copy of
the script in the new tmp subdirectory... So all the quoting, etc. I did, never
changed the script I was running :-(
That's it -- I'm going to bed.. Thanks for the help.
P.S. full picture:
----------- editing =================
| me on my |----------------->| original - dir 1|
| laptop |---------------\ | | |
----------- running ->| copy in - dir 2|
it's good to laugh at yourself every once in a while :p
David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: (936) 715-9333
Facsimile: (936) 715-9339
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