[CentOS] PHP 5.3: IUS vs CentOS repos

[Always Learning]

On Sat, 2011-08-20 at 09:02 -0400, Stephen Harris wrote:

> On Sat, Aug 20, 2011 at 01:49:12PM +0100, Always Learning wrote:
> > 
> > On Sat, 2011-08-20 at 07:43 -0400, Robert Heller wrote:
> > 
> > > (I did some magic with rpm -qa php\* & sed to get the proper list of
> > > stuff to remove and then install.)
> > 
> > One does not require the '\'
> 
> Yes you do.  Especially if there are any files in the directory that would
> match php*.  Basically the shell will attempt to do glob expansion on php*
> (so if you have php.ini and php.conf in the directory then it'll expand
> to those).  Only if no files match will it leave the php* as php*.
> 
> So general good practice is to _always_ quote * (and ?) characters on
> command lines.  You can either \ the character or put the whole thing
> inside '
> 
> eg
>   rpm -qa 'php*'
> or
>   rpm -qa php\*
> 
> But
>   rpm -qa php*
> is considered bad and _may_ break and should not be used.  It's just bad
> practice.
> 
> Watch:
>   $ ls
>   $
> 
> So an empty directory.  We'd expect the command to work...
>   $ rpm -qa php*
>   php-mbstring-5.1.6-27.el5_5.3
>   php-common-5.1.6-27.el5_5.3
>   php-cli-5.1.6-27.el5_5.3
>   php-5.1.6-27.el5_5.3
> 
> Yup!  So far so good.  Now let's create some random files...
>   $ touch php.foobar php.ini php.baz
>   $ rpm -qa php*                    
>   $
> 
> Huh, no results.  Let's debug...
>   $ set -x
>   $ rpm -qa php*                    
>   + rpm -qa php.baz php.foobar php.ini
>   $ 
> 
> You can see the shell has done what I described; php* has been expanded
> (since it's a file glob) to the files in the directory that matched
> 
> Quoting solves the problem:
>   $ rpm -qa php\*
>   + rpm -qa 'php*'
>   php-mbstring-5.1.6-27.el5_5.3
>   php-common-5.1.6-27.el5_5.3
>   php-cli-5.1.6-27.el5_5.3
>   php-5.1.6-27.el5_5.3
> 
> (Debug mode was still on, so you can see how the shell handled it).
> 
> Conclusion: when using * (or ?) on the command line, ALWAYS quote it to
> avoid unexpected side effects.

Thank you. I see the strange unexpected effect:

Server 6 :  mkdir /example
Server 6 :  ls /example
Server 6 :  cd /example
Server 6 :  .l
	total 12
	drwxr-xr-x  2 root root 4096 Aug 20 14:06 .
	drwxr-xr-x 24 root root 4096 Aug 20 14:06 ..
Server 6 :  
Server 6 :  
Server 6 :  touch php.foobar php.ini php.baz
Server 6 :  .l
	total 12
	drwxr-xr-x  2 root root 4096 Aug 20 14:07 .
	drwxr-xr-x 24 root root 4096 Aug 20 14:06 ..
	-rw-r--r--  1 root root    0 Aug 20 14:07 php.baz
	-rw-r--r--  1 root root    0 Aug 20 14:07 php.foobar
	-rw-r--r--  1 root root    0 Aug 20 14:07 php.ini
Server 6 :  ls 
	php.baz  php.foobar  php.ini
Server 6 :  rpm -qa php* 
Server 6 :  
Server 6 :  cd /
Server 6 :  rpm -qa php* 
	php-pdo-5.1.6-27.el5_5.3
	php-mbstring-5.1.6-27.el5_5.3
	php-cli-5.1.6-27.el5_5.3
	php-mcrypt-5.1.6-15.el5.centos.1
	php-common-5.1.6-27.el5_5.3
	php-mysql-5.1.6-27.el5_5.3
	php-5.1.6-27.el5_5.3
	phpmyadmin-2.11.11.3-2.el5.rf
Server 6 :  


Yes. Very unexpected results !

Thanks again.

Paul
Always Learning.