usr/src/lib/libast/common/stdio/fcloseall.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 #include "stdhdr.h"
  25
  26 #define MAXLOOP         3
  27
  28 int
  29 fcloseall(void)
  30 {
  31         Sfpool_t*       p;
  32         Sfpool_t*       next;
  33         int             n;
  34         int             nclose;
  35         int             count;
  36         int             loop;
  37
  38         STDIO_INT(0, "fcloseall", int, (void), ())
  39
  40         for(loop = 0; loop < MAXLOOP; ++loop)
  41         {       nclose = count = 0;
  42                 for(p = &_Sfpool; p; p = next)
  43                 {       /* find the next legitimate pool */
  44                         for(next = p->next; next; next = next->next)
  45                                 if(next->n_sf > 0)
  46                                         break;
  47                         for(n = 0; n < ((p == &_Sfpool) ? p->n_sf : 1); ++n)
  48                         {       count += 1;
  49                                 if(sfclose(p->sf[n]) >= 0)
  50                                         nclose += 1;
  51                         }
  52                 }
  53                 if(nclose == count)
  54                         break;
  55         }
  56         return 0; /* always return 0 per GNU */
  57 }