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NAME
close - close a file descriptor
SYNOPSIS
int close(int fd);
DESCRIPTION
close closes a file descriptor, so that it no longer
refers to any file and may be reused.
If fd is the last copy of a particular file descriptor the
resources associated with it are freed.
RETURN VALUE
close returns zero on success, or -1 if an error occurred.
ERRORS
EBADF fd isn't a valid open file descriptor.
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