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2002-07-24 Roland McGrath <roland@frob.com>
+ Added <ifaddrs.h> interface with functions `getifaddrs', `freeifaddrs'.
+ This implementation supports only IPv4.
+ * inet/ifaddrs.h: New file.
+ * sysdeps/generic/ifaddrs.c: New file.
+ * sysdeps/gnu/ifaddrs.c: New file.
+ * inet/test-ifaddrs.c: New file.
+ * inet/Makefile (routines): Add ifaddrs.
+ (headers): Add ifaddrs.h here.
+ (tests): Add test-ifaddrs.
+ * inet/Versions (GLIBC_2.3): New set, add getifaddrs and freeifaddrs.
+
+ * resolv/res_hconf.c (_res_hconf_reorder_addrs): Use an explicit
+ socket call to get an AF_INET socket, instead of using __opensock.
+ The SIOCGIFNETMASK ioctl will work only with a PF_INET socket.
+
+ * sysdeps/generic/ifreq.h (__ifreq): Take third argument SOCKFD,
+ if not -1 use it instead of calling __opensock.
+ * sysdeps/unix/sysv/linux/ifreq.h (__ifreq): Likewise.
+ * sysdeps/mach/hurd/ifreq.h (__ifreq): Take new argument and ignore it.
+ * resolv/res_hconf.c (_res_hconf_reorder_addrs): Pass new argument.
+
+ * sysdeps/mach/hurd/ifreq.h: New file.
+ * sysdeps/generic/ifreq.h (__if_freereq): Take second argument NUM_IFS.
+ * sysdeps/unix/sysv/linux/ifreq.h (__if_freereq): Likewise.
+ * resolv/res_hconf.c (_res_hconf_reorder_addrs): Update caller.
+
* libio/fileops.c (_IO_file_seekoff_mmap): Don't rely on FP->_offset,
which gets moved around. Calculate size of mmap'd buffer instead.