add fix-get-children-source.patch

1 files changed, 920 insertions, 0 deletions

diff --git a/debian/patches/fix-get-children-source.patch b/debian/patches/fix-get-children-source.patch
new file mode 100644
index 00000000..59848829
--- /dev/null
+++ b/debian/patches/fix-get-children-source.patch
@@ -0,0 +1,920 @@
+diff --git a/hurd/fs.defs b/hurd/fs.defs
+index 52d83bd..cb7abe5 100644
+--- a/hurd/fs.defs
++++ b/hurd/fs.defs
+@@ -352,3 +352,24 @@ routine file_reparent (
+ 	RPT
+ 	parent: mach_port_t;
+ 	out new_file: mach_port_send_t);
++
++/* XXX: update description */
++/* Return any active translators bound to nodes of the receiving
++   filesystem.  CHILDREN is an argz vector containing file names
++   relative to the root of the receiving translator.  */
++routine file_get_children (
++	file: file_t;
++	RPT
++	out children: data_t);
++
++/* XXX: update description */
++/* Return information about the source of the receiving filesystem.
++   If the concept of a source is applicable, SOURCE should refer to
++   the source of the receiving translator and should be a description
++   considered appropriate in the context of the translator.  For
++   example for the case of block device based filesystems, SOURCE
++   should be the file name of the underlying block device.  */
++routine file_get_source (
++	file: file_t;
++	RPT
++	out source: string_t);
+diff --git a/hurd/fsys.defs b/hurd/fsys.defs
+index 7f99f7f..b36b944 100644
+--- a/hurd/fsys.defs
++++ b/hurd/fsys.defs
+@@ -128,21 +128,5 @@ routine fsys_get_options (
+ 	RPT
+ 	out options: data_t, dealloc);
+ 
+-/* Return any active translators bound to nodes of the receiving
+-   filesystem.  CHILDREN is an argz vector containing file names
+-   relative to the root of the receiving translator.  */
+-routine fsys_get_children (
+-	server: fsys_t;
+-	RPT
+-	out children: data_t);
+-
+-/* Return information about the source of the receiving filesystem.
+-   If the concept of a source is applicable, SOURCE should refer to
+-   the source of the receiving translator and should be a description
+-   considered appropriate in the context of the translator.  For
+-   example for the case of block device based filesystems, SOURCE
+-   should be the file name of the underlying block device.  */
+-routine fsys_get_source (
+-	server: fsys_t;
+-	RPT
+-	out source: string_t);
++skip;	/* Was fsys_get_children */
++skip;	/* Was fsys_get_source */
+diff --git a/libdiskfs/Makefile b/libdiskfs/Makefile
+index 03c2e2b..aeebe4e 100644
+--- a/libdiskfs/Makefile
++++ b/libdiskfs/Makefile
+@@ -35,7 +35,7 @@ IOSRCS= io-async-icky.c io-async.c io-duplicate.c io-get-conch.c io-revoke.c \
+ 	io-select.c io-stat.c io-stubs.c io-write.c io-version.c io-sigio.c
+ FSYSSRCS=fsys-getroot.c fsys-goaway.c fsys-startup.c fsys-getfile.c \
+ 	fsys-options.c fsys-syncfs.c fsys-forward.c \
+-	fsys-get-children.c fsys-get-source.c
++	file-get-children.c file-get-source.c
+ IFSOCKSRCS=ifsock.c
+ OTHERSRCS = conch-fetch.c conch-set.c dir-clear.c dir-init.c dir-renamed.c \
+ 	extern-inline.c \
+diff --git a/libdiskfs/file-get-children.c b/libdiskfs/file-get-children.c
+new file mode 100644
+index 0000000..4581e4e
+--- /dev/null
++++ b/libdiskfs/file-get-children.c
+@@ -0,0 +1,95 @@
++/* file_get_children
++
++   Copyright (C) 2013 Free Software Foundation, Inc.
++
++   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
++
++   This file is part of the GNU Hurd.
++
++   The GNU Hurd is free software; you can redistribute it and/or modify
++   it under the terms of the GNU General Public License as published by
++   the Free Software Foundation; either version 2, or (at your option)
++   any later version.
++
++   The GNU Hurd 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 General Public License for more details.
++
++   You should have received a copy of the GNU General Public License
++   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
++
++#include "priv.h"
++#include "fs_S.h"
++
++#include <argz.h>
++
++/* Return any active translators bound to nodes of the receiving
++   filesystem.  CHILDREN is an argz vector containing file names
++   relative to the root of the receiving translator.  */
++error_t
++diskfs_S_file_get_children (struct protid *cred,
++			    char **children,
++			    mach_msg_type_number_t *children_len)
++{
++  error_t err;
++  if (! cred
++      || cred->pi.bucket != diskfs_port_bucket
++      || cred->pi.class != diskfs_protid_class)
++    return EOPNOTSUPP;
++
++  /* check_access performs the same permission check as is normally
++     done, i.e. it checks that all but the last path components are
++     executable by the requesting user and that the last component is
++     readable.	*/
++  error_t check_access (const char *path)
++  {
++    error_t err;
++    char *elements = NULL;
++    size_t elements_len = 0;
++
++    err = argz_create_sep (path, '/', &elements, &elements_len);
++    if (err)
++      return err;
++
++    struct node *dp = diskfs_root_node;
++
++    for (char *entry = elements;
++	 entry;
++	 entry = argz_next (elements, elements_len, entry))
++      {
++	struct node *next;
++	err = diskfs_lookup (dp, entry, LOOKUP, &next, NULL, cred);
++
++	if (dp != diskfs_root_node)
++	  diskfs_nput (dp);
++
++	if (err)
++	  return err;
++
++	dp = next;
++      }
++
++    err = fshelp_access (&dp->dn_stat, S_IRUSR, cred->user);
++    diskfs_nput (dp);
++    return err;
++  }
++
++
++  char *c = NULL;
++  size_t c_len = 0;
++
++  err = fshelp_get_active_translators (&c, &c_len, check_access);
++  if (err)
++    goto errout;
++
++  err = iohelp_return_malloced_buffer (c, c_len, children, children_len);
++  if (err)
++    goto errout;
++
++  c = NULL; /* c was freed by iohelp_return_malloced_buffer. */
++
++ errout:
++  free (c);
++  return err;
++}
+diff --git a/libdiskfs/file-get-source.c b/libdiskfs/file-get-source.c
+new file mode 100644
+index 0000000..4fbb445
+--- /dev/null
++++ b/libdiskfs/file-get-source.c
+@@ -0,0 +1,37 @@
++/* file_get_source
++
++   Copyright (C) 2013 Free Software Foundation, Inc.
++
++   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
++
++   This file is part of the GNU Hurd.
++
++   The GNU Hurd is free software; you can redistribute it and/or modify
++   it under the terms of the GNU General Public License as published by
++   the Free Software Foundation; either version 2, or (at your option)
++   any later version.
++
++   The GNU Hurd 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 General Public License for more details.
++
++   You should have received a copy of the GNU General Public License
++   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
++
++#include "priv.h"
++#include "fs_S.h"
++
++/* Return information about the source of the receiving
++   filesystem.	*/
++error_t
++diskfs_S_file_get_source (struct protid *cred,
++			  char *source)
++{
++  if (! cred
++      || cred->pi.bucket != diskfs_port_bucket
++      || cred->pi.class != diskfs_protid_class)
++    return EOPNOTSUPP;
++  // XXX use cred
++  return diskfs_get_source (source);
++}
+diff --git a/libdiskfs/fsys-get-children.c b/libdiskfs/fsys-get-children.c
+deleted file mode 100644
+index 69c9963..0000000
+--- a/libdiskfs/fsys-get-children.c
++++ /dev/null
+@@ -1,99 +0,0 @@
+-/* fsys_get_children
+-
+-   Copyright (C) 2013 Free Software Foundation, Inc.
+-
+-   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
+-
+-   This file is part of the GNU Hurd.
+-
+-   The GNU Hurd is free software; you can redistribute it and/or modify
+-   it under the terms of the GNU General Public License as published by
+-   the Free Software Foundation; either version 2, or (at your option)
+-   any later version.
+-
+-   The GNU Hurd 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 General Public License for more details.
+-
+-   You should have received a copy of the GNU General Public License
+-   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
+-
+-#include "priv.h"
+-#include "fsys_S.h"
+-
+-#include <argz.h>
+-
+-/* Return any active translators bound to nodes of the receiving
+-   filesystem.  CHILDREN is an argz vector containing file names
+-   relative to the root of the receiving translator.  */
+-error_t
+-diskfs_S_fsys_get_children (fsys_t server,
+-			    mach_port_t reply,
+-			    mach_msg_type_name_t replyPoly,
+-			    char **children,
+-			    mach_msg_type_number_t *children_len)
+-{
+-  error_t err;
+-
+-  struct protid *cred = ports_lookup_port (diskfs_port_bucket,
+-					   server,
+-					   diskfs_protid_class);
+-  if (! cred)
+-    return EOPNOTSUPP;
+-
+-  /* check_access performs the same permission check as is normally
+-     done, i.e. it checks that all but the last path components are
+-     executable by the requesting user and that the last component is
+-     readable.	*/
+-  error_t check_access (const char *path)
+-  {
+-    error_t err;
+-    char *elements = NULL;
+-    size_t elements_len = 0;
+-
+-    err = argz_create_sep (path, '/', &elements, &elements_len);
+-    if (err)
+-      return err;
+-
+-    struct node *dp = diskfs_root_node;
+-
+-    for (char *entry = elements;
+-	 entry;
+-	 entry = argz_next (elements, elements_len, entry))
+-      {
+-	struct node *next;
+-	err = diskfs_lookup (dp, entry, LOOKUP, &next, NULL, cred);
+-
+-	if (dp != diskfs_root_node)
+-	  diskfs_nput (dp);
+-
+-	if (err)
+-	  return err;
+-
+-	dp = next;
+-      }
+-
+-    err = fshelp_access (&dp->dn_stat, S_IRUSR, cred->user);
+-    diskfs_nput (dp);
+-    return err;
+-  }
+-
+-
+-  char *c = NULL;
+-  size_t c_len = 0;
+-
+-  err = fshelp_get_active_translators (&c, &c_len, check_access);
+-  if (err)
+-    goto errout;
+-
+-  err = iohelp_return_malloced_buffer (c, c_len, children, children_len);
+-  if (err)
+-    goto errout;
+-
+-  c = NULL; /* c was freed by iohelp_return_malloced_buffer. */
+-
+- errout:
+-  free (c);
+-  return err;
+-}
+diff --git a/libdiskfs/fsys-get-source.c b/libdiskfs/fsys-get-source.c
+deleted file mode 100644
+index 08f227c..0000000
+--- a/libdiskfs/fsys-get-source.c
++++ /dev/null
+@@ -1,34 +0,0 @@
+-/* fsys_get_source
+-
+-   Copyright (C) 2013 Free Software Foundation, Inc.
+-
+-   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
+-
+-   This file is part of the GNU Hurd.
+-
+-   The GNU Hurd is free software; you can redistribute it and/or modify
+-   it under the terms of the GNU General Public License as published by
+-   the Free Software Foundation; either version 2, or (at your option)
+-   any later version.
+-
+-   The GNU Hurd 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 General Public License for more details.
+-
+-   You should have received a copy of the GNU General Public License
+-   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
+-
+-#include "priv.h"
+-#include "fsys_S.h"
+-
+-/* Return information about the source of the receiving
+-   filesystem.	*/
+-error_t
+-diskfs_S_fsys_get_source (fsys_t server,
+-			  mach_port_t reply,
+-			  mach_msg_type_name_t replyPoly,
+-			  char *source)
+-{
+-  return diskfs_get_source (source);
+-}
+diff --git a/libnetfs/Makefile b/libnetfs/Makefile
+index 1a71b49..c3830c0 100644
+--- a/libnetfs/Makefile
++++ b/libnetfs/Makefile
+@@ -45,7 +45,7 @@ IOSRCS=	io-read.c io-readable.c io-seek.c io-write.c io-stat.c io-async.c     \
+ 	io-version.c
+ 
+ FSYSSRCS= fsys-syncfs.c fsys-getroot.c fsys-get-options.c fsys-set-options.c \
+-	fsys-goaway.c fsysstubs.c fsys-get-children.c fsys-get-source.c
++	fsys-goaway.c fsysstubs.c file-get-children.c file-get-source.c
+ 
+ IFSOCKSRCS=
+ OTHERSRCS= drop-node.c init-init.c make-node.c make-peropen.c make-protid.c   \
+diff --git a/libnetfs/file-get-children.c b/libnetfs/file-get-children.c
+new file mode 100644
+index 0000000..80a727f
+--- /dev/null
++++ b/libnetfs/file-get-children.c
+@@ -0,0 +1,108 @@
++/* file_get_children
++
++   Copyright (C) 2013 Free Software Foundation, Inc.
++
++   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
++
++   This file is part of the GNU Hurd.
++
++   The GNU Hurd is free software; you can redistribute it and/or modify
++   it under the terms of the GNU General Public License as published by
++   the Free Software Foundation; either version 2, or (at your option)
++   any later version.
++
++   The GNU Hurd 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 General Public License for more details.
++
++   You should have received a copy of the GNU General Public License
++   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
++
++#include "priv.h"
++
++#include <argz.h>
++
++/* Return any active translators bound to nodes of the receiving
++   filesystem.  CHILDREN is an argz vector containing file names
++   relative to the root of the receiving translator.  */
++error_t
++netfs_S_file_get_children (struct protid *cred,
++			   char **children,
++			   mach_msg_type_number_t *children_len)
++{
++  error_t err;
++  if (! cred
++      || cred->pi.bucket != netfs_port_bucket
++      || cred->pi.class != netfs_protid_class)
++    return EOPNOTSUPP;
++
++  /* check_access performs the same permission check as is normally
++     done, i.e. it checks that all but the last path components are
++     executable by the requesting user and that the last component is
++     readable.	*/
++  error_t check_access (const char *path)
++  {
++    error_t err;
++    char *elements = NULL;
++    size_t elements_len = 0;
++
++    err = argz_create_sep (path, '/', &elements, &elements_len);
++    if (err)
++      return err;
++
++    struct node *dp = netfs_root_node;
++
++    /* Lock the root node. netfs_attempt_lookup expects the directory to
++       be locked.  */
++    pthread_mutex_lock (&dp->lock);
++
++    /* Increase the reference count, it will be decremented in the loop
++       ahead.  */
++    netfs_nref (dp);
++
++    for (char *entry = elements;
++	 entry;
++	 entry = argz_next (elements, elements_len, entry))
++      {
++	struct node *next;
++	err = netfs_attempt_lookup (cred->user, dp, entry, &next);
++	/* netfs_attempt_lookup has unlocked dp and returned next
++	   locked, so there is no locking to do here.  */
++
++	/* Decrease reference count.  */
++	netfs_nrele (dp);
++
++	if (err)
++	  goto errout;
++
++	dp = next;
++      }
++
++    err = fshelp_access (&dp->nn_stat, S_IRUSR, cred->user);
++
++  errout:
++    /* Unlock and unreference the last node.  */
++    netfs_nput (dp);
++
++    free (elements);
++    return err;
++  }
++
++  char *c = NULL;
++  size_t c_len = 0;
++
++  err = fshelp_get_active_translators (&c, &c_len, check_access);
++  if (err)
++    goto errout;
++
++  err = iohelp_return_malloced_buffer (c, c_len, children, children_len);
++  if (err)
++    goto errout;
++
++  c = NULL; /* c was freed by iohelp_return_malloced_buffer. */
++
++ errout:
++  free (c);
++  return err;
++}
+diff --git a/libnetfs/file-get-source.c b/libnetfs/file-get-source.c
+new file mode 100644
+index 0000000..33db4e4
+--- /dev/null
++++ b/libnetfs/file-get-source.c
+@@ -0,0 +1,38 @@
++/* file_get_source
++
++   Copyright (C) 2013 Free Software Foundation, Inc.
++
++   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
++
++   This file is part of the GNU Hurd.
++
++   The GNU Hurd is free software; you can redistribute it and/or modify
++   it under the terms of the GNU General Public License as published by
++   the Free Software Foundation; either version 2, or (at your option)
++   any later version.
++
++   The GNU Hurd 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 General Public License for more details.
++
++   You should have received a copy of the GNU General Public License
++   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
++
++#include "priv.h"
++#include "fs_S.h"
++
++/* Return information about the source of the receiving
++   filesystem.  */
++error_t
++netfs_S_file_get_source (struct protid *cred,
++			 char *source)
++{
++  if (! cred
++      || cred->pi.bucket != netfs_port_bucket
++      || cred->pi.class != netfs_protid_class)
++    return EOPNOTSUPP;
++
++  // use cred
++  return netfs_get_source (source);
++}
+diff --git a/libnetfs/fsys-get-children.c b/libnetfs/fsys-get-children.c
+deleted file mode 100644
+index fb3af91..0000000
+--- a/libnetfs/fsys-get-children.c
++++ /dev/null
+@@ -1,112 +0,0 @@
+-/* fsys_get_children
+-
+-   Copyright (C) 2013 Free Software Foundation, Inc.
+-
+-   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
+-
+-   This file is part of the GNU Hurd.
+-
+-   The GNU Hurd is free software; you can redistribute it and/or modify
+-   it under the terms of the GNU General Public License as published by
+-   the Free Software Foundation; either version 2, or (at your option)
+-   any later version.
+-
+-   The GNU Hurd 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 General Public License for more details.
+-
+-   You should have received a copy of the GNU General Public License
+-   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
+-
+-#include "priv.h"
+-
+-#include <argz.h>
+-
+-/* Return any active translators bound to nodes of the receiving
+-   filesystem.  CHILDREN is an argz vector containing file names
+-   relative to the root of the receiving translator.  */
+-error_t
+-netfs_S_fsys_get_children (fsys_t server,
+-			   mach_port_t reply,
+-			   mach_msg_type_name_t replyPoly,
+-			   char **children,
+-			   mach_msg_type_number_t *children_len)
+-{
+-  error_t err;
+-
+-  struct protid *cred = ports_lookup_port (netfs_port_bucket,
+-					   server,
+-					   netfs_protid_class);
+-  if (! cred)
+-    return EOPNOTSUPP;
+-
+-  /* check_access performs the same permission check as is normally
+-     done, i.e. it checks that all but the last path components are
+-     executable by the requesting user and that the last component is
+-     readable.	*/
+-  error_t check_access (const char *path)
+-  {
+-    error_t err;
+-    char *elements = NULL;
+-    size_t elements_len = 0;
+-
+-    err = argz_create_sep (path, '/', &elements, &elements_len);
+-    if (err)
+-      return err;
+-
+-    struct node *dp = netfs_root_node;
+-
+-    /* Lock the root node. netfs_attempt_lookup expects the directory to
+-       be locked.  */
+-    pthread_mutex_lock (&dp->lock);
+-
+-    /* Increase the reference count, it will be decremented in the loop
+-       ahead.  */
+-    netfs_nref (dp);
+-
+-    for (char *entry = elements;
+-	 entry;
+-	 entry = argz_next (elements, elements_len, entry))
+-      {
+-	struct node *next;
+-	err = netfs_attempt_lookup (cred->user, dp, entry, &next);
+-	/* netfs_attempt_lookup has unlocked dp and returned next
+-	   locked, so there is no locking to do here.  */
+-
+-	/* Decrease reference count.  */
+-	netfs_nrele (dp);
+-
+-	if (err)
+-	  goto errout;
+-
+-	dp = next;
+-      }
+-
+-    err = fshelp_access (&dp->nn_stat, S_IRUSR, cred->user);
+-
+-  errout:
+-    /* Unlock and unreference the last node.  */
+-    netfs_nput (dp);
+-
+-    free (elements);
+-    return err;
+-  }
+-
+-  char *c = NULL;
+-  size_t c_len = 0;
+-
+-  err = fshelp_get_active_translators (&c, &c_len, check_access);
+-  if (err)
+-    goto errout;
+-
+-  err = iohelp_return_malloced_buffer (c, c_len, children, children_len);
+-  if (err)
+-    goto errout;
+-
+-  c = NULL; /* c was freed by iohelp_return_malloced_buffer. */
+-
+- errout:
+-  free (c);
+-  return err;
+-}
+diff --git a/libnetfs/fsys-get-source.c b/libnetfs/fsys-get-source.c
+deleted file mode 100644
+index 6143d10..0000000
+--- a/libnetfs/fsys-get-source.c
++++ /dev/null
+@@ -1,34 +0,0 @@
+-/* fsys_get_source
+-
+-   Copyright (C) 2013 Free Software Foundation, Inc.
+-
+-   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
+-
+-   This file is part of the GNU Hurd.
+-
+-   The GNU Hurd is free software; you can redistribute it and/or modify
+-   it under the terms of the GNU General Public License as published by
+-   the Free Software Foundation; either version 2, or (at your option)
+-   any later version.
+-
+-   The GNU Hurd 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 General Public License for more details.
+-
+-   You should have received a copy of the GNU General Public License
+-   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
+-
+-#include "priv.h"
+-#include "fsys_S.h"
+-
+-/* Return information about the source of the receiving
+-   filesystem.  */
+-error_t
+-netfs_S_fsys_get_source (fsys_t server,
+-			 mach_port_t reply,
+-			 mach_msg_type_name_t replyPoly,
+-			 char *source)
+-{
+-  return netfs_get_source (source);
+-}
+diff --git a/libtrivfs/Makefile b/libtrivfs/Makefile
+index 241b76d..3e4c039 100644
+--- a/libtrivfs/Makefile
++++ b/libtrivfs/Makefile
+@@ -35,7 +35,7 @@ IOSRCS=io-async-icky.c io-async.c io-duplicate.c io-map.c io-modes-get.c \
+ 
+ FSYSSRCS=fsys-getroot.c fsys-goaway.c fsys-stubs.c fsys-syncfs.c \
+ 	fsys-forward.c fsys-set-options.c fsys-get-options.c \
+-	fsys-get-children.c fsys-get-source.c
++	file-get-children.c file-get-source.c
+ 
+ OTHERSRCS=demuxer.c protid-clean.c protid-dup.c cntl-create.c \
+ 	cntl-clean.c migsupport.c times.c startup.c open.c \
+diff --git a/libtrivfs/file-get-children.c b/libtrivfs/file-get-children.c
+new file mode 100644
+index 0000000..a3afbba
+--- /dev/null
++++ b/libtrivfs/file-get-children.c
+@@ -0,0 +1,35 @@
++/* file_get_children
++
++   Copyright (C) 2013 Free Software Foundation, Inc.
++
++   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
++
++   This file is part of the GNU Hurd.
++
++   The GNU Hurd is free software; you can redistribute it and/or modify
++   it under the terms of the GNU General Public License as published by
++   the Free Software Foundation; either version 2, or (at your option)
++   any later version.
++
++   The GNU Hurd 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 General Public License for more details.
++
++   You should have received a copy of the GNU General Public License
++   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
++
++#include "priv.h"
++
++/* Return any active translators bound to nodes of the receiving
++   filesystem.  CHILDREN is an argz vector containing file names
++   relative to the root of the receiving translator.  */
++error_t
++trivfs_S_file_get_children (struct trivfs_protid *cred,
++			    mach_port_t reply,
++			    mach_msg_type_name_t replyPoly,
++			    char **children,
++			    mach_msg_type_number_t *children_len)
++{
++  return EOPNOTSUPP;
++}
+diff --git a/libtrivfs/file-get-source.c b/libtrivfs/file-get-source.c
+new file mode 100644
+index 0000000..dd6d7d7
+--- /dev/null
++++ b/libtrivfs/file-get-source.c
+@@ -0,0 +1,34 @@
++/* file_get_source
++
++   Copyright (C) 2013 Free Software Foundation, Inc.
++
++   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
++
++   This file is part of the GNU Hurd.
++
++   The GNU Hurd is free software; you can redistribute it and/or modify
++   it under the terms of the GNU General Public License as published by
++   the Free Software Foundation; either version 2, or (at your option)
++   any later version.
++
++   The GNU Hurd 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 General Public License for more details.
++
++   You should have received a copy of the GNU General Public License
++   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
++
++#include "priv.h"
++
++/* Return information about the source of the receiving
++   filesystem.	*/
++error_t
++trivfs_S_file_get_source (struct trivfs_protid *cred,
++			  mach_port_t reply,
++			  mach_msg_type_name_t replyPoly,
++			  char *source)
++{
++  // xxx use cred
++  return cred ? trivfs_get_source (source) : EOPNOTSUPP;
++}
+diff --git a/libtrivfs/fsys-get-children.c b/libtrivfs/fsys-get-children.c
+deleted file mode 100644
+index 4697cc5..0000000
+--- a/libtrivfs/fsys-get-children.c
++++ /dev/null
+@@ -1,35 +0,0 @@
+-/* fsys_get_children
+-
+-   Copyright (C) 2013 Free Software Foundation, Inc.
+-
+-   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
+-
+-   This file is part of the GNU Hurd.
+-
+-   The GNU Hurd is free software; you can redistribute it and/or modify
+-   it under the terms of the GNU General Public License as published by
+-   the Free Software Foundation; either version 2, or (at your option)
+-   any later version.
+-
+-   The GNU Hurd 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 General Public License for more details.
+-
+-   You should have received a copy of the GNU General Public License
+-   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
+-
+-#include "priv.h"
+-
+-/* Return any active translators bound to nodes of the receiving
+-   filesystem.  CHILDREN is an argz vector containing file names
+-   relative to the root of the receiving translator.  */
+-error_t
+-trivfs_S_fsys_get_children (trivfs_control_t server,
+-			    mach_port_t reply,
+-			    mach_msg_type_name_t replyPoly,
+-			    char **children,
+-			    mach_msg_type_number_t *children_len)
+-{
+-  return EOPNOTSUPP;
+-}
+diff --git a/libtrivfs/fsys-get-source.c b/libtrivfs/fsys-get-source.c
+deleted file mode 100644
+index 64aec2f..0000000
+--- a/libtrivfs/fsys-get-source.c
++++ /dev/null
+@@ -1,33 +0,0 @@
+-/* fsys_get_source
+-
+-   Copyright (C) 2013 Free Software Foundation, Inc.
+-
+-   Written by Justus Winter <4winter@informatik.uni-hamburg.de>
+-
+-   This file is part of the GNU Hurd.
+-
+-   The GNU Hurd is free software; you can redistribute it and/or modify
+-   it under the terms of the GNU General Public License as published by
+-   the Free Software Foundation; either version 2, or (at your option)
+-   any later version.
+-
+-   The GNU Hurd 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 General Public License for more details.
+-
+-   You should have received a copy of the GNU General Public License
+-   along with the GNU Hurd.  If not, see <http://www.gnu.org/licenses/>.  */
+-
+-#include "priv.h"
+-
+-/* Return information about the source of the receiving
+-   filesystem.	*/
+-error_t
+-trivfs_S_fsys_get_source (trivfs_control_t server,
+-			  mach_port_t reply,
+-			  mach_msg_type_name_t replyPoly,
+-			  char *source)
+-{
+-  return trivfs_get_source (source);
+-}
+diff --git a/trans/Makefile b/trans/Makefile
+index c0386d0..90df479 100644
+--- a/trans/Makefile
++++ b/trans/Makefile
+@@ -56,7 +56,7 @@ magic: ../libiohelp/libiohelp.a
+ hello: ../libtrivfs/libtrivfs.a ../libfshelp/libfshelp.a ../libports/libports.a ../libihash/libihash.a
+ fakeroot: ../libnetfs/libnetfs.a ../libfshelp/libfshelp.a ../libiohelp/libiohelp.a ../libports/libports.a ../libihash/libihash.a
+ remap: ../libtrivfs/libtrivfs.a ../libfshelp/libfshelp.a ../libports/libports.a ../libihash/libihash.a
+-mtab: ../libtrivfs/libtrivfs.a ../libfshelp/libfshelp.a ../libports/libports.a ../libihash/libihash.a fsysUser.o
++mtab: ../libtrivfs/libtrivfs.a ../libfshelp/libfshelp.a ../libports/libports.a ../libihash/libihash.a fsUser.o
+ $(targets): ../libshouldbeinlibc/libshouldbeinlibc.a
+ 
+ $(targets): %: %.o
+diff --git a/trans/mtab.c b/trans/mtab.c
+index 75ef1d3..d5fc7a0 100644
+--- a/trans/mtab.c
++++ b/trans/mtab.c
+@@ -421,7 +421,7 @@ mtab_populate (struct mtab *mtab, const char *path, int insecure)
+   argz_stringify (options, options_len, ',');
+ 
+   string_t source;
+-  err = fsys_get_source (node, source);
++  err = file_get_source (node, source);
+   if (err)
+     {
+       if (err == EOPNOTSUPP)
+@@ -450,7 +450,7 @@ mtab_populate (struct mtab *mtab, const char *path, int insecure)
+     goto errout;
+ 
+   /* path has an active translator, query its children.	 */
+-  err = fsys_get_children (node, &children, &children_len);
++  err = file_get_children (node, &children, &children_len);
+   if (err == EOPNOTSUPP)
+     {
+       err = 0;
+diff --git a/trans/symlink.c b/trans/symlink.c
+index 8562662..845a112 100644
+--- a/trans/symlink.c
++++ b/trans/symlink.c
+@@ -234,18 +234,3 @@ S_fsys_forward (mach_port_t server, mach_port_t requestor,
+ {
+   return EOPNOTSUPP;
+ }
+-
+-error_t
+-S_fsys_get_children (mach_port_t server,
+-		     char **children,
+-		     mach_msg_type_number_t *children_len)
+-{
+-  return EOPNOTSUPP;
+-}
+-
+-error_t
+-S_fsys_get_source (mach_port_t server,
+-		   char *source)
+-{
+-  return EOPNOTSUPP;
+-}