about System.Posix.Files.fileAccess
Hi. This is of course a personal opinion, but I think the interface of: fileAccess :: FilePath -> Bool -> Bool -> Bool -> IO Bool http://haskell.org/ghc/docs/latest/html/libraries/unix/System-Posix-Files.ht... is not very good. Is it possible to design (in theory) a better interface? Thanks Manlio Perillo
manlio_perillo:
Hi.
This is of course a personal opinion, but I think the interface of: fileAccess :: FilePath -> Bool -> Bool -> Bool -> IO Bool http://haskell.org/ghc/docs/latest/html/libraries/unix/System-Posix-Files.ht...
is not very good.
Is it possible to design (in theory) a better interface?
It is possible (in theory) to design a better interface. :) -- Don
On 2009 Jan 14, at 9:02, Manlio Perillo wrote:
This is of course a personal opinion, but I think the interface of: fileAccess :: FilePath -> Bool -> Bool -> Bool -> IO Bool http://haskell.org/ghc/docs/latest/html/libraries/unix/System-Posix-Files.ht... :fileAccess
is not very good.
The underlying system call access() is strongly disrecommended, so it's not really worth a better interface. -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH
Brandon S. Allbery KF8NH ha scritto:
On 2009 Jan 14, at 9:02, Manlio Perillo wrote:
This is of course a personal opinion, but I think the interface of: fileAccess :: FilePath -> Bool -> Bool -> Bool -> IO Bool http://haskell.org/ghc/docs/latest/html/libraries/unix/System-Posix-Files.ht...
is not very good.
The underlying system call access() is strongly disrecommended, so it's not really worth a better interface.
I can't see problems with access function. Of course it is a problem if used incorrectly: if (access("foo", F_OK) { fd = open("foo", ...) } Manlio Perillo
On 2009 Jan 15, at 5:57, Manlio Perillo wrote:
Brandon S. Allbery KF8NH ha scritto:
On 2009 Jan 14, at 9:02, Manlio Perillo wrote:
This is of course a personal opinion, but I think the interface of: fileAccess :: FilePath -> Bool -> Bool -> Bool -> IO Bool http://haskell.org/ghc/docs/latest/html/libraries/unix/System-Posix-Files.ht... :fileAccess
is not very good. The underlying system call access() is strongly disrecommended, so it's not really worth a better interface.
I can't see problems with access function.
Of course it is a problem if used incorrectly:
if (access("foo", F_OK) { fd = open("foo", ...) }
The problem is there are very few uses of access() which are safe and not already covered better by stat() (getFileStatus). -- brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH
participants (3)
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Brandon S. Allbery KF8NH -
Don Stewart -
Manlio Perillo