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  for connected embedded systems
  Close a file
  Synopsis:
  #include <unistd.h> int close( int filedes );
  Arguments:
  - filedes
  - The file descriptor of the file you want to close. This can be a file descriptor returned by a successful call to accept(), creat(), dup(), dup2(), fcntl(), modem_open(), open(), shm_open(), socket() or sopen().
  Library:
  libc
  Use the -l c option to qcc to link against this library. This library is usually included automatically.
  Description:
  The close() function closes the file specified by the given file descriptor.
  Returns:
  Zero for success, or -1 if an error occurs (errno is set).
  Errors:
  - EBADF
  - Invalid file descriptor filedes.
  - EINTR
  - The close() call was interrupted by a signal.
  - EIO
  - An I/O error occurred while updating the directory information.
  - ENOSPC
  - A previous buffered write call has failed.
  - ENOSYS
  - The close() function isn't implemented for the filesystem specified by filedes.
  Examples:
  #include <fcntl.h> #include <unistd.h> #include <stdlib.h> int main( void ) { int filedes; filedes = open( "file", O_RDONLY ); if( filedes != -1 ) { /* process file */ close( filedes ); return EXIT_SUCCESS; } return EXIT_FAILURE; }
  Classification:
  See also:
  accept(), creat(), dup(), dup2(), errno, fcntl(), modem_open(), open(), shm_open(), socket(), sopen()