Function cupsFileOpenFd

cups/file.c:1198–1305

 */

cups_file_t *				/* O - CUPS file or @code NULL@ if the file could not be opened */
cupsFileOpenFd(int        fd,		/* I - File descriptor */
	       const char *mode)	/* I - Open mode */
{
  cups_file_t	*fp;			/* New CUPS file */


  DEBUG_printf(("cupsFileOpenFd(fd=%d, mode=\"%s\")", fd, mode));

 /*
  * Range check input...
  */

  if (fd < 0 || !mode ||
      (*mode != 'r' && *mode != 'w' && *mode != 'a' && *mode != 's') ||
      (*mode == 'a' && isdigit(mode[1] & 255)))
    return (NULL);

 /*
  * Allocate memory...
  */

  if ((fp = calloc(1, sizeof(cups_file_t))) == NULL)
    return (NULL);

 /*
  * Open the file...
  */

  fp->fd = fd;

  switch (*mode)
  {
    case 'a' :
        fp->pos = lseek(fd, 0, SEEK_END);

    case 'w' :
	fp->mode = 'w';
	fp->ptr  = fp->buf;
	fp->end  = fp->buf + sizeof(fp->buf);

#ifdef HAVE_LIBZ
	if (mode[1] >= '1' && mode[1] <= '9')
	{
	 /*
	  * Open a compressed stream, so write the standard gzip file
	  * header...
	  */

          unsigned char header[10];	/* gzip file header */
	  time_t	curtime;	/* Current time */


          curtime   = time(NULL);
	  header[0] = 0x1f;
	  header[1] = 0x8b;
	  header[2] = Z_DEFLATED;
	  header[3] = 0;