minix/lib/libc/sys-minix/shutdown.c

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#include <sys/cdefs.h>
#include "namespace.h"
#include <errno.h>
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <net/gen/in.h>
#include <net/gen/tcp.h>
#include <net/gen/tcp_io.h>
#ifdef __weak_alias
__weak_alias(shutdown, _shutdown)
#endif
#define DEBUG 0
static int _tcp_shutdown(int sock, int how);
static int _uds_shutdown(int sock, int how);
int shutdown(int sock, int how)
{
int r;
struct sockaddr_un uds_addr;
nwio_tcpconf_t tcpconf;
r= ioctl(sock, NWIOGTCPCONF, &tcpconf);
if (r != -1 || (errno != ENOTTY && errno != EBADIOCTL))
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _tcp_shutdown(sock, how);
}
r= ioctl(sock, NWIOGUDSADDR, &uds_addr);
if (r != -1 || (errno != ENOTTY && errno != EBADIOCTL))
{
if (r == -1)
{
/* Bad file descriptor */
return -1;
}
return _uds_shutdown(sock, how);
}
#if DEBUG
fprintf(stderr, "shutdown: not implemented for fd %d\n", sock);
#endif
errno= ENOSYS;
return -1;
}
static int _tcp_shutdown(int sock, int how)
{
int r;
if (how == SHUT_WR || how == SHUT_RDWR)
{
r= ioctl(sock, NWIOTCPSHUTDOWN, NULL);
if (r == -1)
return -1;
if (how == SHUT_WR)
return 0;
}
/* We can't shutdown the read side of the socket. */
errno= ENOSYS;
return -1;
}
static int _uds_shutdown(int sock, int how)
{
return ioctl(sock, NWIOSUDSSHUT, &how);
}