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1 definition found
From The Free On-line Dictionary of Computing (05 January 2017) [foldoc]:
file descriptor
An integer that identifies an
open file within a process. This number is obtained as a
result of opening a file. Operations which read, write, or
close a file would take the file descriptor as an input
parameter.
In many operating system implementations, file descriptors
are small integers which index a table of open files. In
Unix, file descriptors 0, 1 and 2 correspond to the
standard input, standard output and standard error files
respectively.
See file descriptor leak.
(1998-02-06)