text: /*
   * Program:	Write data, treating partial writes as an error
   *
   * Author:	Mark Crispin
   *		Networks and Distributed Computing
   *		Computing & Communications
   *		University of Washington
   *		Administration Building, AG-44
   *		Seattle, WA  98195
   *		Internet: MRC@CAC.Washington.EDU
   *
   * Date:	26 May 1995
   * Last Edited:	24 October 2000
   * 
   * The IMAP toolkit provided in this Distribution is
   * Copyright 2000 University of Washington.
   * The full text of our legal notices is contained in the file called
   * CPYRIGHT, included with this Distribution.
   */
  
  /*  The whole purpose of this unfortunate routine is to deal with DOS and
   * certain cretinous versions of UNIX which decided that the "bytes actually
   * written" return value from write() gave them license to use that for things
   * that are really errors, such as disk quota exceeded, maximum file size
   * exceeded, disk full, etc.
   * 
   *  BSD won't screw us this way on the local filesystem, but who knows what
   * some NFS-mounted filesystem will do.
   */
  
  #undef write
  
  /* Write data to file
   * Accepts: file descriptor
   *	    I/O vector structure
   *	    number of vectors in structure
   * Returns: number of bytes written if successful, -1 if failure
   */
  
  long maxposint = (long)((((unsigned long) 1) << ((sizeof(int) * 8) - 1)) - 1);
  
  long safe_write (int fd,char *buf,long nbytes)
  {
    long i,j;
    if (nbytes > 0) for (i = nbytes; i; i -= j,buf += j) {
      while (((j = write (fd,buf,(int) min (maxposint,i))) < 0) &&
  	   (errno == EINTR));
      if (j < 0) return j;
    }
    return nbytes;
  }
  