lib/libc/sys-minix/shutdown.c

   1 #include <sys/cdefs.h>
   2 #include "namespace.h"
   3
   4 #include <errno.h>
   5 #include <stdio.h>
   6 #include <sys/ioctl.h>
   7 #include <sys/socket.h>
   8 #include <sys/un.h>
   9
  10 #include <net/gen/in.h>
  11 #include <net/gen/tcp.h>
  12 #include <net/gen/tcp_io.h>
  13
  14 #define DEBUG 0
  15
  16 static int _tcp_shutdown(int sock, int how);
  17 static int _uds_shutdown(int sock, int how);
  18
  19 int shutdown(int sock, int how)
  20 {
  21         int r;
  22         struct sockaddr_un uds_addr;
  23         nwio_tcpconf_t tcpconf;
  24
  25         r= ioctl(sock, NWIOGTCPCONF, &tcpconf);
  26         if (r != -1 || errno != ENOTTY)
  27         {
  28                 if (r == -1)
  29                 {
  30                         /* Bad file descriptor */
  31                         return -1;
  32                 }
  33                 return _tcp_shutdown(sock, how);
  34         }
  35
  36         r= ioctl(sock, NWIOGUDSADDR, &uds_addr);
  37         if (r != -1 || errno != ENOTTY)
  38         {
  39                 if (r == -1)
  40                 {
  41                         /* Bad file descriptor */
  42                         return -1;
  43                 }
  44                 return _uds_shutdown(sock, how);
  45         }
  46
  47 #if DEBUG
  48         fprintf(stderr, "shutdown: not implemented for fd %d\n", sock);
  49 #endif
  50         errno= ENOSYS;
  51         return -1;
  52 }
  53
  54 static int _tcp_shutdown(int sock, int how)
  55 {
  56         int r;
  57
  58         if (how == SHUT_WR || how == SHUT_RDWR)
  59         {
  60                 r= ioctl(sock, NWIOTCPSHUTDOWN, NULL);
  61                 if (r == -1)
  62                         return -1;
  63                 if (how == SHUT_WR)
  64                         return 0;
  65         }
  66
  67         /* We can't shutdown the read side of the socket. */
  68         errno= ENOSYS;
  69         return -1;
  70 }
  71
  72 static int _uds_shutdown(int sock, int how)
  73 {
  74         return ioctl(sock, NWIOSUDSSHUT, &how);
  75 }