usr/src/lib/libast/common/stdio/fflush.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23
  24 #ifndef _USE_GNU
  25 #define _USE_GNU
  26 #endif
  27
  28 #include "stdhdr.h"
  29
  30 int
  31 fflush(Sfio_t* f)
  32 {
  33         if (!f)
  34                 return fcloseall();
  35
  36         STDIO_INT(f, "fflush", int, (Sfio_t*), (f))
  37
  38         if (f->extent > 0)
  39                 sfseek(f, (Sfoff_t)0, SEEK_CUR|SF_PUBLIC);
  40         return (sfsync(f) < 0 || sfpurge(f) < 0) ? -1 : 0;
  41 }