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Knowing if a file descriptor is open

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Join Date: Jun 2008
Location: Igualada (Barcelona)
Posts: 86
#1: Nov 20 '08
Is there any way, using fcntl() to know whether a filedescriptor is open or closed (*NIX environment)

ashitpro's Avatar
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Join Date: Aug 2007
Posts: 389
#2: Nov 20 '08

re: Knowing if a file descriptor is open

Can't you use select() system call?
If you pass the closed file descriptor as parameter it will return the -1 indicating the error. And errno will be set to EBADF

Regards,
Ash
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