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 close(2)							    close(2)




 NAME
      close - close a file descriptor

 SYNOPSIS
      #include <&lt&lt&lt;unistd.h>&gt&gt&gt;

      int close(int fildes);

 DESCRIPTION
      close() closes the file descriptor indicated by fildes.  fildes is a
      file descriptor obtained from a creat(), open(), dup(), fcntl(), or
      pipe() system call.  All associated file segments which have been
      locked by this process with the lockf() function are released (i.e.,
      unlocked).

 RETURN VALUE
      Upon successful completion, close() returns a value of 0; otherwise,
      it returns -1 and sets errno to indicate the error.

 ERRORS
      close() fails if the any of following conditions are encountered:

	   [EBADF]	  fildes is not a valid open file descriptor.

	   [EINTR]	  An attempt to close a slow device or connection
			  was interrupted by a signal.	The file descriptor
			  still points to an open device or connection.

	   [ENOSPC]	  Not enough space on the file system.	This error
			  can occur when closing a file on an NFS file
			  system.  [When a write() system call is executed
			  on a local file system and if a new buffer needs
			  to be allocated to hold the data, the buffer is
			  mapped onto the disk at that time.  A full disk is
			  detected at this time and write() returns an
			  error.  When the write() system call is executed
			  on an NFS file system, the new buffer is allocated
			  without communicating with the NFS server to see
			  if there is space for the buffer (to improve NFS
			  performance).	 It is only when the buffer is
			  written to the server (at file close or the buffer
			  is full) that the disk-full condition is
			  detected.]

 SEE ALSO
      creat(2), dup(2), exec(2), fcntl(2), lockf(2), open(2), pipe(2).

 STANDARDS CONFORMANCE
      close(): AES, SVID2, SVID3, XPG2, XPG3, XPG4, FIPS 151-2, POSIX.1





 Hewlett-Packard Company	    - 1 -   HP-UX Release 11i: November 2000