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 #ifdef __weak_alias
  15 __weak_alias(shutdown, _shutdown)
  16 #endif
  17
  18 #define DEBUG 0
  19
  20 static int _tcp_shutdown(int sock, int how);
  21 static int _uds_shutdown(int sock, int how);
  22
  23 int shutdown(int sock, int how)
  24 {
  25         int r;
  26         struct sockaddr_un uds_addr;
  27         nwio_tcpconf_t tcpconf;
  28
  29         r= ioctl(sock, NWIOGTCPCONF, &tcpconf);
  30         if (r != -1 || (errno != ENOTTY && errno != EBADIOCTL))
  31         {
  32                 if (r == -1)
  33                 {
  34                         /* Bad file descriptor */
  35                         return -1;
  36                 }
  37                 return _tcp_shutdown(sock, how);
  38         }
  39
  40         r= ioctl(sock, NWIOGUDSADDR, &uds_addr);
  41         if (r != -1 || (errno != ENOTTY && errno != EBADIOCTL))
  42         {
  43                 if (r == -1)
  44                 {
  45                         /* Bad file descriptor */
  46                         return -1;
  47                 }
  48                 return _uds_shutdown(sock, how);
  49         }
  50
  51 #if DEBUG
  52         fprintf(stderr, "shutdown: not implemented for fd %d\n", sock);
  53 #endif
  54         errno= ENOSYS;
  55         return -1;
  56 }
  57
  58 static int _tcp_shutdown(int sock, int how)
  59 {
  60         int r;
  61
  62         if (how == SHUT_WR || how == SHUT_RDWR)
  63         {
  64                 r= ioctl(sock, NWIOTCPSHUTDOWN, NULL);
  65                 if (r == -1)
  66                         return -1;
  67                 if (how == SHUT_WR)
  68                         return 0;
  69         }
  70
  71         /* We can't shutdown the read side of the socket. */
  72         errno= ENOSYS;
  73         return -1;
  74 }
  75
  76 static int _uds_shutdown(int sock, int how)
  77 {
  78         return ioctl(sock, NWIOSUDSSHUT, &how);
  79 }