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file/untar: try to better accomodate Windows permissions

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This commit is contained in:
Matthew Flatt 2012-11-19 17:06:07 -07:00
parent 68bdf190d7
commit a9d2a8a764
1 changed files with 20 additions and 4 deletions
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24
collects/file/untar.rkt
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@ -113,10 +113,10 @@
(lambda ()
(try-file-op
(lambda ()
(file-or-directory-permissions filename mode)))
(file-or-directory-permissions* filename mode #t)))
(try-file-op
(lambda ()
(file-or-directory-modify-seconds filename mod-time))))
(file-or-directory-modify-seconds* filename mod-time #t))))
delays)]
[(file)
(define-values (base name dir?) (split-path filename))
@ -128,10 +128,10 @@
(copy-bytes size in out)))
(try-file-op
(lambda ()
(file-or-directory-permissions filename mode)))
(file-or-directory-permissions* filename mode #f)))
(try-file-op
(lambda ()
(file-or-directory-modify-seconds filename mod-time)))
(file-or-directory-modify-seconds* filename mod-time #f)))
(copy-bytes (- total-len size) in #f)
delays]
[(link)
@ -192,3 +192,19 @@
(log-error "untar: ~a" (exn-message exn))
(void))])
(thunk)))
(define (file-or-directory-modify-seconds* filename mod-time dir?)
(unless (and dir? (eq? (system-type) 'windows))
(file-or-directory-modify-seconds filename mod-time)))
(define (file-or-directory-permissions* file perms dir?)
(file-or-directory-permissions file
(case (system-type)
[(windows)
;; corce perms to be the same for user, group, and others
(define user-perms (bitwise-and #o700))
(bitwise-ior user-perms
(arithmetic-shift user-perms -3)
(arithmetic-shift user-perms -6))]
[else perms])))