sunrpc/svc_run.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  */
  29 /*
  30  * This is the rpc server side idle loop
  31  * Wait for input, call server program.
  32  */
  33
  34 #include <errno.h>
  35 #include <unistd.h>
  36 #include <libintl.h>
  37 #include <sys/poll.h>
  38 #include <rpc/rpc.h>
  39
  40 /* This function can be used as a signal handler to terminate the
  41    server loop.  */
  42 void
  43 svc_exit (void)
  44 {
  45   free (svc_pollfd);
  46   svc_pollfd = NULL;
  47   svc_max_pollfd = 0;
  48 }
  49
  50 void
  51 svc_run (void)
  52 {
  53   int i;
  54   struct pollfd *my_pollfd = NULL;
  55   int last_max_pollfd = 0;
  56
  57   for (;;)
  58     {
  59       int max_pollfd = svc_max_pollfd;
  60       if (max_pollfd == 0 && svc_pollfd == NULL)
  61         break;
  62
  63       if (last_max_pollfd != max_pollfd)
  64         {
  65           struct pollfd *new_pollfd
  66             = realloc (my_pollfd, sizeof (struct pollfd) * max_pollfd);
  67
  68           if (new_pollfd == NULL)
  69             {
  70               perror (_("svc_run: - out of memory"));
  71               break;
  72             }
  73
  74           my_pollfd = new_pollfd;
  75           last_max_pollfd = max_pollfd;
  76         }
  77
  78       for (i = 0; i < max_pollfd; ++i)
  79         {
  80           my_pollfd[i].fd = svc_pollfd[i].fd;
  81           my_pollfd[i].events = svc_pollfd[i].events;
  82           my_pollfd[i].revents = 0;
  83         }
  84
  85       switch (i = __poll (my_pollfd, max_pollfd, -1))
  86         {
  87         case -1:
  88           if (errno == EINTR)
  89             continue;
  90           perror (_("svc_run: - poll failed"));
  91           break;
  92         case 0:
  93           continue;
  94         default:
  95           INTUSE(svc_getreq_poll) (my_pollfd, i);
  96           continue;
  97         }
  98       break;
  99     }
 100
 101   free (my_pollfd);
 102 }