[MacPorts] #29105: corruption - malformed partial receipt can be written

[MacPorts]

#29105: corruption - malformed partial receipt can be written
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 Reporter:  alangrow+macports@…          |       Owner:  macports-tickets@…                   
     Type:  defect                       |      Status:  new                                  
 Priority:  Normal                       |   Milestone:                                       
Component:  base                         |     Version:  1.9.2                                
 Keywords:  malformed receipt            |        Port:                                       
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 When upgrading, port ran out of disk space, but wrote a partial receipt
 file. After freeing up space and retrying the operation, port would error
 out with a "malformed receipt" error.

 It took a while to track this down, but removing the partial receipt file
 did finally get things working again.

 I haven't looked at the port code but these problems can usually be
 avoided by first writing to a temporary file, closing, and then (if there
 were no errors) doing an atomic rename.

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Ticket URL: <https://trac.macports.org/ticket/29105>
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