Remove pre-2.2 Linux kernel support.

1 files changed, 22 insertions, 179 deletions

diff --git a/sysdeps/unix/sysv/linux/if_index.c b/sysdeps/unix/sysv/linux/if_index.c
index 8d9b4871ec..3c86bb8654 100644
--- a/sysdeps/unix/sysv/linux/if_index.c
+++ b/sysdeps/unix/sysv/linux/if_index.c
@@ -1,5 +1,4 @@
-/* Copyright (C) 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2007
-   Free Software Foundation, Inc.
+/* Copyright (C) 1997-2012 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -32,14 +31,6 @@
 #include "netlinkaccess.h"
 
 
-/* Variable to signal whether SIOCGIFCONF is not available.  */
-# if __ASSUME_SIOCGIFNAME == 0
-static int old_siocgifconf;
-#else
-# define old_siocgifconf 0
-#endif
-
-
 unsigned int
 if_nametoindex (const char *ifname)
 {
@@ -101,38 +92,20 @@ if_nameindex_ioctl (void)
 
   /* We may be able to get the needed buffer size directly, rather than
      guessing.  */
-  if (! old_siocgifconf)
-    {
-      ifc.ifc_buf = NULL;
-      ifc.ifc_len = 0;
-      if (__ioctl (fd, SIOCGIFCONF, &ifc) < 0 || ifc.ifc_len == 0)
-	{
-# if __ASSUME_SIOCGIFNAME == 0
-	  old_siocgifconf = 1;
-# endif
-	  rq_len = RQ_IFS * sizeof (struct ifreq);
-	}
-      else
-	rq_len = ifc.ifc_len;
-    }
-  else
+  ifc.ifc_buf = NULL;
+  ifc.ifc_len = 0;
+  if (__ioctl (fd, SIOCGIFCONF, &ifc) < 0 || ifc.ifc_len == 0)
     rq_len = RQ_IFS * sizeof (struct ifreq);
+  else
+    rq_len = ifc.ifc_len;
 
   /* Read all the interfaces out of the kernel.  */
   ifc.ifc_buf = alloca (rq_len);
   ifc.ifc_len = rq_len;
-  while (1)
+  if (__ioctl (fd, SIOCGIFCONF, &ifc) < 0)
     {
-        if (__ioctl (fd, SIOCGIFCONF, &ifc) < 0)
-	{
-	  close_not_cancel_no_status (fd);
-	  return NULL;
-	}
-      if (ifc.ifc_len < rq_len || ! old_siocgifconf)
-	break;
-
-      ifc.ifc_buf = extend_alloca (ifc.ifc_buf, rq_len, 2 * rq_len);
-      ifc.ifc_len = rq_len;
+      close_not_cancel_no_status (fd);
+      return NULL;
     }
 
   nifs = ifc.ifc_len / sizeof (struct ifreq);
@@ -314,161 +287,31 @@ libc_hidden_def (if_nameindex)
 char *
 if_indextoname (unsigned int ifindex, char *ifname)
 {
-#if !defined SIOCGIFINDEX && __ASSUME_SIOCGIFNAME == 0
-  __set_errno (ENOSYS);
-  return NULL;
-#else
-# if __ASSUME_SIOCGIFNAME == 0
-  struct if_nameindex *idx;
-  struct if_nameindex *p;
-  char *result = NULL;
-# endif
-
-# if defined SIOCGIFNAME || __ASSUME_SIOCGIFNAME > 0
   /* We may be able to do the conversion directly, rather than searching a
      list.  This ioctl is not present in kernels before version 2.1.50.  */
   struct ifreq ifr;
   int fd;
-#  if __ASSUME_SIOCGIFNAME == 0
-  static int siocgifname_works_not;
-
-  if (!siocgifname_works_not)
-#  endif
-    {
-#  if __ASSUME_SIOCGIFNAME == 0
-      int serrno = errno;
-#  endif
-      int status;
-
-      fd = __opensock ();
-
-      if (fd < 0)
-	return NULL;
-
-      ifr.ifr_ifindex = ifindex;
-      status = __ioctl (fd, SIOCGIFNAME, &ifr);
-
-      close_not_cancel_no_status (fd);
+  int status;
 
-      if (status  < 0)
-	{
-#  if __ASSUME_SIOCGIFNAME == 0
-	  if (errno == EINVAL)
-	    siocgifname_works_not = 1; /* Don't make the same mistake twice. */
-	  else
-#  endif
-	    {
-	      if (errno == ENODEV)
-		/* POSIX requires ENXIO.  */
-		__set_errno (ENXIO);
+  fd = __opensock ();
 
-	      return NULL;
-	    }
-	}
-      else
-	return strncpy (ifname, ifr.ifr_name, IFNAMSIZ);
+  if (fd < 0)
+    return NULL;
 
-#  if __ASSUME_SIOCGIFNAME == 0
-      __set_errno (serrno);
-#  endif
-    }
-# endif
+  ifr.ifr_ifindex = ifindex;
+  status = __ioctl (fd, SIOCGIFNAME, &ifr);
 
-# if __ASSUME_SIOCGIFNAME == 0
-  idx = if_nameindex ();
+  close_not_cancel_no_status (fd);
 
-  if (idx != NULL)
+  if (status  < 0)
     {
-      for (p = idx; p->if_index || p->if_name; ++p)
-	if (p->if_index == ifindex)
-	  {
-	    result = strncpy (ifname, p->if_name, IFNAMSIZ);
-	    break;
-	  }
-
-      if_freenameindex (idx);
-
-      if (result == NULL)
+      if (errno == ENODEV)
+	/* POSIX requires ENXIO.  */
 	__set_errno (ENXIO);
-    }
-  return result;
-# endif
-#endif
-}
-libc_hidden_def (if_indextoname)
-
-
-#if 0
-void
-internal_function
-__protocol_available (int *have_inet, int *have_inet6)
-{
-  int fd = __opensock ();
-  unsigned int nifs;
-  int rq_len;
-  struct ifconf ifc;
-# define RQ_IFS	4
 
-  /* Wirst case assumption.  */
-  *have_inet = 0;
-  *have_inet6 = 0;
-
-  if (fd < 0)
-    /* We cannot open the socket.  No networking at all?  */
-    return;
-
-  /* We may be able to get the needed buffer size directly, rather than
-     guessing.  */
-  if (! old_siocgifconf)
-    {
-      ifc.ifc_buf = NULL;
-      ifc.ifc_len = 0;
-      if (__ioctl (fd, SIOCGIFCONF, &ifc) < 0 || ifc.ifc_len == 0)
-	{
-# if __ASSUME_SIOCGIFNAME == 0
-	  old_siocgifconf = 1;
-# endif
-	  rq_len = RQ_IFS * sizeof (struct ifreq);
-	}
-      else
-	rq_len = ifc.ifc_len;
+      return NULL;
     }
   else
-    rq_len = RQ_IFS * sizeof (struct ifreq);
-
-  /* Read all the interfaces out of the kernel.  */
-  do
-    {
-      ifc.ifc_buf = alloca (ifc.ifc_len = rq_len);
-      if (__ioctl (fd, SIOCGIFCONF, &ifc) < 0)
-	{
-	  close_not_cancel_no_status (fd);
-	  return;
-	}
-      rq_len *= 2;
-    }
-  while (ifc.ifc_len == rq_len && old_siocgifconf);
-
-  nifs = ifc.ifc_len / sizeof (struct ifreq);
-
-  /* Go through all the interfaces and get the address.  */
-  while (nifs-- > 0)
-    if (__ioctl (fd, SIOCGIFADDR, &ifc.ifc_req[nifs]) >= 0)
-      {
-	/* We successfully got information about this interface.  Now
-	   test whether it is an IPv4 or IPv6 address.  */
-	if (ifc.ifc_req[nifs].ifr_addr.sa_family == AF_INET)
-	  *have_inet = 1;
-	else if (ifc.ifc_req[nifs].ifr_addr.sa_family == AF_INET6)
-	  *have_inet6 = 1;
-
-	/* Note, this is & not &&.  It works since the values are always
-	   0 or 1.  */
-	if (*have_inet & *have_inet6)
-	  /* We can stop early.  */
-	  break;
-      }
-
-  close_not_cancel_no_status (fd);
+    return strncpy (ifname, ifr.ifr_name, IFNAMSIZ);
 }
-#endif
+libc_hidden_def (if_indextoname)