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 #define __FORCE_GLIBC
  35 #include <features.h>
  36
  37 #include <errno.h>
  38 #include <unistd.h>
  39 #include <poll.h>
  40 #include <rpc/rpc.h>
  41
  42 /* used by svc_[max_]pollfd */
  43
  44 /* This function can be used as a signal handler to terminate the
  45    server loop.  */
  46 void
  47 svc_exit (void)
  48 {
  49   free (svc_pollfd);
  50   svc_pollfd = NULL;
  51   svc_max_pollfd = 0;
  52 }
  53
  54 void
  55 svc_run (void)
  56 {
  57   int i;
  58
  59   for (;;)
  60     {
  61       struct pollfd *my_pollfd;
  62
  63       if (svc_max_pollfd == 0 && svc_pollfd == NULL)
  64         return;
  65
  66       my_pollfd = malloc (sizeof (struct pollfd) * svc_max_pollfd);
  67       for (i = 0; i < svc_max_pollfd; ++i)
  68         {
  69           my_pollfd[i].fd = svc_pollfd[i].fd;
  70           my_pollfd[i].events = svc_pollfd[i].events;
  71           my_pollfd[i].revents = 0;
  72         }
  73
  74       switch (i = poll (my_pollfd, svc_max_pollfd, -1))
  75         {
  76         case -1:
  77           free (my_pollfd);
  78           if (errno == EINTR)
  79             continue;
  80           perror (_("svc_run: - poll failed"));
  81           return;
  82         case 0:
  83           free (my_pollfd);
  84           continue;
  85         default:
  86           svc_getreq_poll (my_pollfd, i);
  87           free (my_pollfd);
  88         }
  89     }
  90 }