Re: [Chicken-janitors] #1146: create-temporary-file and create-temporary-directory are subject to race conditions

[Chicken Trac]

#1146: create-temporary-file and create-temporary-directory are subject to race
conditions
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  Reporter:  mario           |       Owner:                                     
              
      Type:  defect          |      Status:  new                                
              
  Priority:  major           |   Milestone:  someday                            
              
 Component:  core libraries  |     Version:  4.10.x                             
              
Resolution:                  |    Keywords:  create-temporary-file, 
create-temporary-directory
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Description changed by mario:

Old description:

> Both use the non-atomic strategy of checking if a file system object
> exist then act, which may lead to race conditions.
>
> {{{create-temporary-directory}}} is specially more fragile because it
> uses {{{directory-exists?}}} to check if a file system object exists.
> So, for example, if a regular file with the same name as the attempted
> one exists, create-temporary-directory will fail.

New description:

 Both use the non-atomic strategy of checking if a file system object
 exists then act, which may lead to race conditions.

 {{{create-temporary-directory}}} is specially more fragile because it uses
 {{{directory-exists?}}} to check if a file system object exists.  So, for
 example, if a regular file with the same name as the attempted one exists,
 create-temporary-directory will fail.

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Ticket URL: <http://bugs.call-cc.org/ticket/1146#comment:1>
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