Function cups_write

cups/file.c:2815–2873

 */

static ssize_t				/* O - Number of bytes written or -1 */
cups_write(cups_file_t *fp,		/* I - CUPS file */
           const char  *buf,		/* I - Buffer */
	   size_t      bytes)		/* I - Number bytes */
{
  size_t	total;			/* Total bytes written */
  ssize_t	count;			/* Count this time */


  DEBUG_printf(("7cups_write(fp=%p, buf=%p, bytes=" CUPS_LLFMT ")", (void *)fp, (void *)buf, CUPS_LLCAST bytes));

 /*
  * Loop until all bytes are written...
  */

  total = 0;
  while (bytes > 0)
  {
#ifdef _WIN32
    if (fp->mode == 's')
      count = (ssize_t)send(fp->fd, buf, (unsigned)bytes, 0);
    else
      count = (ssize_t)write(fp->fd, buf, (unsigned)bytes);
#else
    if (fp->mode == 's')
      count = send(fp->fd, buf, bytes, 0);
    else
      count = write(fp->fd, buf, bytes);
#endif /* _WIN32 */

    DEBUG_printf(("9cups_write: count=" CUPS_LLFMT, CUPS_LLCAST count));

    if (count < 0)
    {
     /*
      * Writes can be interrupted by signals and unavailable resources...
      */

      if (errno == EAGAIN || errno == EINTR)
        continue;
      else
        return (-1);
    }

   /*
    * Update the counts for the last write call...
    */

    bytes -= (size_t)count;
    total += (size_t)count;
    buf   += count;
  }

 /*
  * Return the total number of bytes written...
  */

  return ((ssize_t)total);