Document new files for Linux i386/ELF port.

Fri Sep  8 16:32:12 1995  Ulrich Drepper  <drepper@gnu.ai.mit.edu>

        * sysdeps/unix/sysv/linux/Implies,
        sysdeps/unix/sysv/linux/Makefile, sysdeps/unix/sysv/linux/Subdirs,
        sysdeps/unix/sysv/linux/accept.S, sysdeps/unix/sysv/linux/adjtime.c,
        sysdeps/unix/sysv/linux/adjtimex.S, sysdeps/unix/sysv/linux/bind.S,
        sysdeps/unix/sysv/linux/connect.S, sysdeps/unix/sysv/linux/direct.h,
        sysdeps/unix/sysv/linux/dl-machine.h, sysdeps/unix/sysv/linux/errnos.h,
        sysdeps/unix/sysv/linux/fork.S, sysdeps/unix/sysv/linux/gethostid.c,
        sysdeps/unix/sysv/linux/gethostname.C,
        sysdeps/unix/sysv/linux/getpeername.S,
        sysdeps/unix/sysv/linux/getpgid.S, sysdeps/unix/sysv/linux/getpgrp.S,
	sysdeps/unix/sysv/linux/getsockname.S,
	sysdeps/unix/sysv/linux/getsockopt.S, sysdeps/unix/sysv/linux/gtty.S,
	sysdeps/unix/sysv/linux/listen.S, sysdeps/unix/sysv/linux/local_lim.h,
	sysdeps/unix/sysv/linux/madvise.c, sysdeps/unix/sysv/linux/msgctl.c,
	sysdeps/unix/sysv/linux/msgget.c, sysdeps/unix/sysv/linux/msgrcv.c,
	sysdeps/unix/sysv/linux/msgsnd.c, sysdeps/unix/sysv/linux/pipe.S,
	sysdeps/unix/sysv/linux/poll.c, sysdeps/unix/sysv/linux/readv.c,
	sysdeps/unix/sysv/linux/recv.S, sysdeps/unix/sysv/linux/recvfrom.S,
	sysdeps/unix/sysv/linux/recvmsg.S, sysdeps/unix/sysv/linux/semctl.c,
	sysdeps/unix/sysv/linux/semget.c, sysdeps/unix/sysv/linux/semop.c,
	sysdeps/unix/sysv/linux/send.S, sysdeps/unix/sysv/linux/sendmsg.S,
	sysdeps/unix/sysv/linux/sendto.S, sysdeps/unix/sysv/linux/setegid.c,
	sysdeps/unix/sysv/linux/seteuid.c, sysdeps/unix/sysv/linux/sethostid.c,
	sysdeps/unix/sysv/linux/setpgid.c, sysdeps/unix/sysv/linux/setpgrp.c,
	sysdeps/unix/sysv/linux/setsid.S, sysdeps/unix/sysv/linux/setsockopt.S,
	sysdeps/unix/sysv/linux/settimeofday.S,
	sysdeps/unix/sysv/linux/shmat.c, sysdeps/unix/sysv/linux/shmctl.c,
	sysdeps/unix/sysv/linux/shmdt.c, sysdeps/unix/sysv/linux/shmget.c,
	sysdeps/unix/sysv/linux/shutdown.S,
	sysdeps/unix/sysv/linux/sigaction.S, sysdeps/unix/sysv/linux/signal.S,
	sysdeps/unix/sysv/linux/sigpending.S, sysdeps/unix/sysv/linux/sigset.h,
	sysdeps/unix/sysv/linux/sockaddrcom.h,
	sysdeps/unix/sysv/linux/socketpair.S, sysdeps/unix/sysv/linux/speed.c,
	sysdeps/unix/sysv/linux/statbuf.h, sysdeps/unix/sysv/linux/stty.S,
	sysdeps/unix/sysv/linux/syscall.h, sysdeps/unix/sysv/linux/sysconf.c,
	sysdeps/unix/sysv/linux/tcdrain.c, sysdeps/unix/sysv/linux/tcflow.c,
	sysdeps/unix/sysv/linux/tcflush.c, sysdeps/unix/sysv/linux/tcgetattr.c,
	sysdeps/unix/sysv/linux/tcsetattr.c,
	sysdeps/unix/sysv/linux/termbits.h, sysdeps/unix/sysv/linux/ualarm.c,
	sysdeps/unix/sysv/linux/ulimit.c, sysdeps/unix/sysv/linux/usleep.c,
	sysdeps/unix/sysv/linux/utsnamelen.h, sysdeps/unix/sysv/linux/vfork.c,
	sysdeps/unix/sysv/linux/wait.c, sysdeps/unix/sysv/linux/wait4.S,
	sysdeps/unix/sysv/linux/waitpid.c, sysdeps/unix/sysv/linux/writev.c:
	New Linux/ELF specific, architecture independent files.

	sysdeps/unix/sysv/linux/i386/Dist,
	sysdeps/unix/sysv/linux/i386/Makefile,
	sysdeps/unix/sysv/linux/i386/brk.S,
	sysdeps/unix/sysv/linux/i386/fcntlbits.h,
	sysdeps/unix/sysv/linux/i386/fpu_control.c,
	sysdeps/unix/sysv/linux/i386/fpu_control.h,
	sysdeps/unix/sysv/linux/i386/fstat.S,
	sysdeps/unix/sysv/linux/i386/fxstat.S,
	sysdeps/unix/sysv/linux/i386/ieee_fpu.c,
	sysdeps/unix/sysv/linux/i386/init-first.S,
	sysdeps/unix/sysv/linux/i386/ipc.S,
	sysdeps/unix/sysv/linux/i386/lstat.S,
	sysdeps/unix/sysv/linux/i386/lxstat.S,
	sysdeps/unix/sysv/linux/i386/mknod.S,
	sysdeps/unix/sysv/linux/i386/mmap.S,
	sysdeps/unix/sysv/linux/i386/sbrk.S,
	sysdeps/unix/sysv/linux/i386/setfpucw.c,
	sysdeps/unix/sysv/linux/i386/signum.h,
	sysdeps/unix/sysv/linux/i386/socket.S,
	sysdeps/unix/sysv/linux/i386/stat.S,
	sysdeps/unix/sysv/linux/i386/syscall.S,
	sysdeps/unix/sysv/linux/i386/sysdep.S,
	sysdeps/unix/sysv/linux/i386/sysdep.h,
	sysdeps/unix/sysv/linux/i386/xmknod.S,
	sysdeps/unix/sysv/linux/i386/xstat.S:
	New Linux i386/ELF specific files.

	sysdeps/unix/sysv/linux/sys/ipc_buf.h,
	sysdeps/unix/sysv/linux/sys/mman.h,
	sysdeps/unix/sysv/linux/sys/msq_buf.h,
	sysdeps/unix/sysv/linux/sys/sem_buf.h,
	sysdeps/unix/sysv/linux/sys/shm_buf.h,
	sysdeps/unix/sysv/linux/sys/socketcall.h,
	sysdeps/unix/sysv/linux/sys/timex.h:
	New Linux/ELF specific, architecture independent header files.

1 files changed, 96 insertions, 0 deletions

diff --git a/sysdeps/unix/sysv/linux/gethostid.c b/sysdeps/unix/sysv/linux/gethostid.c
new file mode 100644
index 0000000000..94f4a1ece7
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/gethostid.c
@@ -0,0 +1,96 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+#define HOSTIDFILE "/var/adm/hostid"
+
+#ifdef SET_PROCEDURE
+int
+sethostid (id)
+     long int id;
+{
+  int fd;
+  ssize_t written;
+
+  /* Test for appropriate rights to set host ID.  */
+  if (geteuid () || getuid ())
+    {
+      errno = EPERM;
+      return -1;
+    }
+
+  /* Open file for writing.  Everybody is allowed to read this file.  */
+  fd = __open (HOSTIDFILE, O_CREAT|O_WRONLY, 0644);
+  if (fd < 0)
+    return -1;
+
+  written = __write (fd, &id, sizeof (id));
+
+  __close (fd);
+
+  return written != sizeof (id) ? -1 : 0;
+}
+
+#else
+# include <sys/param.h>
+# include <resolv/netdb.h>
+# include <netinet/in.h>
+
+long int
+gethostid ()
+{
+  char hostname[MAXHOSTNAMELEN + 1];
+  struct hostent *hp;
+  unsigned long id;
+  struct in_addr in;
+  int fd;
+
+  /* First try to get the ID from a former invocation of sethostid.  */
+  fd = __open (HOSTIDFILE, O_RDONLY);
+  if (fd >= 0)
+    {
+      ssize_t n = __read (fd, &id, sizeof (id));
+
+      __close (fd);
+
+      if (n == sizeof (id))
+	return id;
+    }
+
+  /* Getting from the file was not succesful.  An intelligent guess for
+     a unique number of a host is its IP address.  Return this.  */
+  if (gethostname (hostname, MAXHOSTNAMELEN) < 0 || hostname[0] == '\0')
+    /* This also fails.  Return and arbitrary value.  */
+    return 0;
+
+  /* To get the IP address we need to knoe the host name.  */
+  hp = gethostbyname (hostname);
+  if (hp == NULL)
+    return 0;
+
+  in.s_addr = 0;
+  memcpy (&in, hp->h_addr,
+	  sizeof (in) < hp->h_length ? sizeof (in) : hp->h_length);
+
+  /* For the return value to be not exactly the IP address we do some
+     bit fiddling.  */
+  return in.s_addr << 16 | in.s_addr >> 16;
+}
+#endif