initial import

1 files changed, 381 insertions, 0 deletions

diff --git a/hurd/hurdlookup.c b/hurd/hurdlookup.c
new file mode 100644
index 0000000000..b467404840
--- /dev/null
+++ b/hurd/hurdlookup.c
@@ -0,0 +1,381 @@
+/* Copyright (C) 1992, 1993, 1994, 1995 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
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <hurd.h>
+#include <string.h>
+#include <limits.h>
+#include <fcntl.h>
+#include "stdio/_itoa.h"
+#include <hurd/term.h>
+
+
+/* Translate the error from dir_lookup into the error the user sees.  */
+static inline error_t
+lookup_error (error_t error)
+{
+  switch (error)
+    {
+    case EOPNOTSUPP:
+    case MIG_BAD_ID:
+      /* These indicate that the server does not understand dir_lookup
+	 at all.  If it were a directory, it would, by definition.  */
+      return ENOTDIR;
+    default:
+      return error;
+    }
+}
+
+error_t
+__hurd_file_name_lookup (file_t crdir, file_t cwdir,
+			 const char *file_name, int flags, mode_t mode,
+			 file_t *result)
+{
+  error_t err;
+  enum retry_type doretry;
+  char retryname[1024];		/* XXX string_t LOSES! */
+  file_t startdir;
+
+  startdir = file_name[0] == '/' ? crdir : cwdir;
+
+  while (file_name[0] == '/')
+    file_name++;
+
+  if (err = __dir_lookup (startdir, file_name, flags, mode,
+			  &doretry, retryname, result))
+    return lookup_error (err);
+
+  return __hurd_file_name_lookup_retry (crdir, doretry, retryname, flags, mode,
+					result);
+}
+weak_alias (__hurd_file_name_lookup, hurd_file_name_lookup)
+
+error_t
+__hurd_file_name_lookup_retry (file_t crdir,
+			       enum retry_type doretry,
+			       char retryname[1024],
+			       int flags, mode_t mode,
+			       file_t *result)
+{
+  error_t err;
+  file_t startdir;
+  file_t newpt;
+  char *file_name;
+  int dealloc_dir;
+  int nloops;
+
+  dealloc_dir = 0;
+  nloops = 0;
+  err = 0;
+  
+  while (1)
+    {
+      if (dealloc_dir)
+	__mach_port_deallocate (__mach_task_self (), startdir);
+      if (err)
+	return lookup_error (err);
+
+      switch (doretry)
+	{
+	case FS_RETRY_REAUTH:
+	  {
+	    mach_port_t ref = __mach_reply_port ();
+	    err = __io_reauthenticate (*result,
+				       ref, MACH_MSG_TYPE_MAKE_SEND);
+	    if (! err)
+	      err = __USEPORT
+		(AUTH, __auth_user_authenticate (port, *result,
+						 ref,
+						 MACH_MSG_TYPE_MAKE_SEND,
+						 &newpt));
+	    __mach_port_destroy (__mach_task_self (), ref);
+	  }
+	  __mach_port_deallocate (__mach_task_self (), *result);
+	  if (err)
+	    return err;
+	  *result = newpt;
+	  /* Fall through.  */
+
+	case FS_RETRY_NORMAL:
+#ifdef SYMLOOP_MAX
+	  if (nloops++ >= SYMLOOP_MAX)
+	    return ELOOP;
+#endif
+
+	  /* An empty RETRYNAME indicates we have the final port.  */
+	  if (retryname[0] == '\0')
+	    {
+	      /* We got a successful translation.  Now apply any open-time
+		 action flags we were passed.  */
+	      if (flags & O_EXLOCK)
+		;		/* XXX */
+	      if (!err && (flags & O_SHLOCK))
+		;		/* XXX */
+	      if (!err && (flags & O_TRUNC))
+		err = __file_truncate (*result, 0);
+
+	      if (err)
+		__mach_port_deallocate (__mach_task_self (), *result);
+	      return err;
+	    }
+
+	  startdir = *result;
+	  dealloc_dir = 1;
+	  file_name = retryname;
+	  break;
+
+	case FS_RETRY_MAGICAL:
+	  switch (retryname[0])
+	    {
+	    case '/':
+	      startdir = crdir;
+	      dealloc_dir = 0;
+	      if (*result != MACH_PORT_NULL)
+		__mach_port_deallocate (__mach_task_self (), *result);
+	      file_name = &retryname[1];
+	      break;
+
+	    case 'f':
+	      if (retryname[1] == 'd' && retryname[2] == '/')
+		{
+		  int fd;
+		  char *end;
+		  int save = errno;
+		  errno = 0;
+		  fd = (int) strtol (retryname, &end, 10);
+		  if (end == NULL || errno || /* Malformed number.  */
+		      /* Check for excess text after the number.  A slash
+			 is valid; it ends the component.  Anything else
+			 does not name a numeric file descriptor.  */
+		      (*end != '/' && *end != '\0'))
+		    {
+		      errno = save;
+		      return ENOENT;
+		    }
+		  *result = __getdport (fd);
+		  if (*result == MACH_PORT_NULL)
+		    {
+		      /* If the name was a proper number, but the file
+			 descriptor does not exist, we return EBADF instead
+			 of ENOENT.  */
+		      error_t err = errno;
+		      errno = save;
+		      return err;
+		    }
+		  errno = save;
+		  if (*end == '\0')
+		    return 0;
+		  else
+		    {
+		      /* Do a normal retry on the remaining components.  */
+		      startdir = *result;
+		      dealloc_dir = 1;
+		      file_name = end + 1; /* Skip the slash.  */
+		      break;
+		    }
+		}
+	      else
+		goto bad_magic;
+	      break;
+
+	    case 'm':
+	      if (retryname[1] == 'a' && retryname[2] == 'c' &&
+		  retryname[3] == 'h' && retryname[4] == 't' &&
+		  retryname[5] == 'y' && retryname[6] == 'p' &&
+		  retryname[7] == 'e')
+		{
+		  error_t err;
+		  struct host_basic_info hostinfo;
+		  mach_msg_type_number_t hostinfocnt = HOST_BASIC_INFO_COUNT;
+		  char *p;
+		  if (err = __host_info (__mach_host_self (), HOST_BASIC_INFO,
+					 (natural_t *) &hostinfo,
+					 &hostinfocnt))
+		    return err;
+		  if (hostinfocnt != HOST_BASIC_INFO_COUNT)
+		    return EGRATUITOUS;
+		  p = _itoa (hostinfo.cpu_subtype, &retryname[8], 10, 0);
+		  *--p = '/';
+		  p = _itoa (hostinfo.cpu_type, &retryname[8], 10, 0);
+		  if (p < retryname)
+		    abort ();	/* XXX write this right if this ever happens */
+		  if (p > retryname)
+		    strcpy (retryname, p);
+		  startdir = *result;
+		  dealloc_dir = 1;
+		}
+	      else
+		goto bad_magic;
+	      break;
+
+	    case 't':
+	      if (retryname[1] == 't' && retryname[2] == 'y')
+		switch (retryname[3])
+		  {
+		    error_t opentty (file_t *result)
+		      {
+			error_t err;
+			file_t unauth;
+			err = __USEPORT (CTTYID,
+					 __termctty_open_terminal (port,
+								   flags,
+								   &unauth));
+			if (! err)
+			  {
+			    mach_port_t ref = __mach_reply_port ();
+			    err = __io_reauthenticate
+			      (unauth,
+			       ref,
+			       MACH_MSG_TYPE_MAKE_SEND);
+			    if (! err)
+			      err = __USEPORT
+				(AUTH, __auth_user_authenticate
+				 (port,
+				  unauth,
+				  ref, MACH_MSG_TYPE_MAKE_SEND,
+				  result));
+			    __mach_port_deallocate (__mach_task_self (),
+						    unauth);
+			    __mach_port_destroy (__mach_task_self (), ref);
+			  }
+			return err;
+		      }
+
+		  case '\0':
+		    return opentty (result);
+		  case '/':
+		    if (err = opentty (&startdir))
+		      return err;
+		    dealloc_dir = 1;
+		    strcpy (retryname, &retryname[4]);
+		    break;
+		  default:
+		    goto bad_magic;
+		  }
+	      else
+		goto bad_magic;
+	      break;
+
+	    default:
+	    bad_magic:
+	      return EGRATUITOUS;
+	    }
+	  break;		
+
+	default:
+	  return EGRATUITOUS;
+	}
+
+      err = __dir_lookup (startdir, file_name, flags, mode,
+			  &doretry, retryname, result);
+    }
+}
+weak_alias (__hurd_file_name_lookup_retry, hurd_file_name_lookup_retry)
+
+error_t
+__hurd_file_name_split (file_t crdir, file_t cwdir,
+			const char *file_name,
+			file_t *dir, char **name)
+{
+  const char *lastslash;
+  error_t err;
+
+  lastslash = strrchr (file_name, '/');
+  if (lastslash != NULL)
+    {
+      if (lastslash == file_name)
+	{
+	  /* "/foobar" => crdir + "foobar".  */
+	  *name = (char *) file_name + 1;
+	  if (err = __mach_port_mod_refs (__mach_task_self (), 
+					  crdir, MACH_PORT_RIGHT_SEND, +1))
+	    return err;
+	  *dir = crdir;
+	  return 0;
+	}
+      else
+	{
+	  /* "/dir1/dir2/.../file".  */
+	  char dirname[lastslash - file_name + 1];
+	  memcpy (dirname, file_name, lastslash - file_name);
+	  dirname[lastslash - file_name] = '\0';
+	  *name = (char *) lastslash + 1;
+	  return __hurd_file_name_lookup (crdir, cwdir, dirname, 0, 0, dir);
+	}
+    }
+  else
+    {
+      /* "foobar" => cwdir + "foobar".  */
+      *name = (char *) file_name;
+      if (err = __mach_port_mod_refs (__mach_task_self (),
+				      cwdir, MACH_PORT_RIGHT_SEND, +1))
+	return err;
+      *dir = cwdir;
+      return 0;
+    }
+}
+weak_alias (__hurd_file_name_split, hurd_file_name_split)
+
+
+file_t
+__file_name_lookup (const char *file_name, int flags, mode_t mode)
+{
+  error_t err;
+  file_t result, crdir, cwdir;
+  struct hurd_userlink crdir_ulink, cwdir_ulink;
+
+  crdir = _hurd_port_get (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink);
+  cwdir = _hurd_port_get (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink);
+
+  err = __hurd_file_name_lookup (crdir, cwdir, file_name, flags, mode,
+				 &result);
+
+  _hurd_port_free (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink, crdir);
+  _hurd_port_free (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink, cwdir);
+
+  if (err)
+    return __hurd_fail (err), MACH_PORT_NULL;
+  else
+    return result;
+}
+weak_alias (__file_name_lookup, file_name_lookup)
+
+
+file_t
+__file_name_split (const char *file_name, char **name)
+{
+  error_t err;
+  file_t dir, crdir, cwdir;
+  struct hurd_userlink crdir_ulink, cwdir_ulink;
+
+  crdir = _hurd_port_get (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink);
+  cwdir = _hurd_port_get (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink);
+
+  err = __hurd_file_name_split (crdir, cwdir, file_name, &dir, name);
+
+  _hurd_port_free (&_hurd_ports[INIT_PORT_CRDIR], &crdir_ulink, crdir);
+  _hurd_port_free (&_hurd_ports[INIT_PORT_CWDIR], &cwdir_ulink, cwdir);
+
+  if (err)
+    {
+      errno = err;
+      return MACH_PORT_NULL;
+    }
+  else
+    return dir;
+}
+weak_alias (__file_name_split, file_name_split)