[PATCH] added libsysfs code from sysutils-0.1.1-071803 release

10 files changed, 2210 insertions, 0 deletions

diff --git a/libsysfs/LGPL b/libsysfs/LGPL
new file mode 100644
index 0000000000..e00a829bb6
--- /dev/null
+++ b/libsysfs/LGPL
@@ -0,0 +1,441 @@
+      
+      GNU Lesser Public License
+      Version 2.1, February 1999
+
+        Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+        59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+        Everyone is permitted to copy and distribute verbatim copies
+        of this license document, but changing it is not allowed.
+
+        [This is the first released version of the Lesser GPL. It also counts
+        as the successor of the GNU Library Public License, version 2, hence
+        the version number 2.1.]
+
+      Preamble
+
+      The licenses for most software are designed to take away your freedom to 
+      share and change it. By contrast, the GNU General Public Licenses are 
+      intended to guarantee your freedom to share and change free software--to 
+      make sure the software is free for all its users.
+ 
+      This license, the Lesser General Public License, applies to some specially 
+      designated software packages--typically libraries--of the Free Software 
+      Foundation and other authors who decide to use it. You can use it too, but 
+      we suggest you first think carefully about whether this license or the 
+      ordinary General Public License is the better strategy to use in any 
+      particular case, based on the explanations below. 
+
+      When we speak of free software, we are referring to freedom of use, not 
+      price. Our General Public Licenses are designed to make sure that you have 
+      the freedom to distribute copies of free software (and charge for this 
+      service if you wish); that you receive source code or can get it if you 
+      want it; that you can change the software and use pieces of it in new free 
+      programs; and that you are informed that you can do these things.
+
+      To protect your rights, we need to make restrictions that forbid 
+      distributors to deny you these rights or to ask you to surrender these 
+      rights. These restrictions translate to certain responsibilities for you 
+      if you distribute copies of the library or if you modify it. 
+
+      For example, if you distribute copies of the library, whether gratis or 
+      for a fee, you must give the recipients all the rights that we gave you. 
+      You must make sure that they, too, receive or can get the source code. If 
+      you link other code with the library, you must provide complete object 
+      files to the recipients, so that they can relink them with the library 
+      after making changes to the library and recompiling it. And you must show 
+      them these terms so they know their rights. 
+
+      We protect your rights with a two-step method: (1) we copyright the 
+      library, and (2) we offer you this license, which gives you legal 
+      permission to copy, distribute and/or modify the library. 
+
+      To protect each distributor, we want to make it very clear that there is 
+      no warranty for the free library. Also, if the library is modified by 
+      someone else and passed on, the recipients should know that what they have 
+      is not the original version, so that the original author's reputation will 
+      not be affected by problems that might be introduced by others. 
+
+      Finally, software patents pose a constant threat to the existence of any 
+      free program. We wish to make sure that a company cannot effectively 
+      restrict the users of a free program by obtaining a restrictive license 
+      from a patent holder. Therefore, we insist that any patent license 
+      obtained for a version of the library must be consistent with the full 
+      freedom of use specified in this license. 
+
+      Most GNU software, including some libraries, is covered by the ordinary 
+      GNU General Public License. This license, the GNU Lesser General Public 
+      License, applies to certain designated libraries, and is quite different 
+      from the ordinary General Public License. We use this license for certain 
+      libraries in order to permit linking those libraries into non-free 
+      programs. 
+
+      When a program is linked with a library, whether statically or using a 
+      shared library, the combination of the two is legally speaking a combined 
+      work, a derivative of the original library. The ordinary General Public 
+      License therefore permits such linking only if the entire combination fits 
+      its criteria of freedom. The Lesser General Public License permits more 
+      lax criteria for linking other code with the library. 
+
+      We call this license the "Lesser" General Public License because it does 
+      Less to protect the user's freedom than the ordinary General Public 
+      License. It also provides other free software developers Less of an 
+      advantage over competing non-free programs. These disadvantages are the 
+      reason we use the ordinary General Public License for many libraries. 
+      However, the Lesser license provides advantages in certain special 
+      circumstances. 
+
+      For example, on rare occasions, there may be a special need to encourage 
+      the widest possible use of a certain library, so that it becomes a 
+      de-facto standard. To achieve this, non-free programs must be allowed to 
+      use the library. A more frequent case is that a free library does the same 
+      job as widely used non-free libraries. In this case, there is little to 
+      gain by limiting the free library to free software only, so we use the 
+      Lesser General Public License. 
+
+      In other cases, permission to use a particular library in non-free 
+      programs enables a greater number of people to use a large body of free 
+      software. For example, permission to use the GNU C Library in non-free 
+      programs enables many more people to use the whole GNU operating system, 
+      as well as its variant, the GNU/Linux operating system. 
+
+      Although the Lesser General Public License is Less protective of the 
+      users' freedom, it does ensure that the user of a program that is linked 
+      with the Library has the freedom and the wherewithal to run that program 
+      using a modified version of the Library. 
+
+      The precise terms and conditions for copying, distribution and 
+      modification follow. Pay close attention to the difference between a "work 
+      based on the library" and a "work that uses the library". The former 
+      contains code derived from the library, whereas the latter must be 
+      combined with the library in order to run. 
+
+      TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+      0. This License Agreement applies to any software library or other program 
+      which contains a notice placed by the copyright holder or other authorized 
+      party saying it may be distributed under the terms of this Lesser General 
+      Public License (also called "this License"). Each licensee is addressed as 
+      "you".
+
+      A "library" means a collection of software functions and/or data prepared 
+      so as to be conveniently linked with application programs (which use some 
+      of those functions and data) to form executables. 
+
+      The "Library", below, refers to any such software library or work which 
+      has been distributed under these terms. A "work based on the Library" 
+      means either the Library or any derivative work under copyright law: that 
+      is to say, a work containing the Library or a portion of it, either 
+      verbatim or with modifications and/or translated straightforwardly into 
+      another language. (Hereinafter, translation is included without limitation 
+      in the term "modification".) 
+
+      "Source code" for a work means the preferred form of the work for making 
+      modifications to it. For a library, complete source code means all the 
+      source code for all modules it contains, plus any associated interface 
+      definition files, plus the scripts used to control compilation and 
+      installation of the library.
+
+      Activities other than copying, distribution and modification are not 
+      covered by this License; they are outside its scope. The act of running a 
+      program using the Library is not restricted, and output from such a 
+      program is covered only if its contents constitute a work based on the 
+      Library (independent of the use of the Library in a tool for writing it). 
+      Whether that is true depends on what the Library does and what the program 
+      that uses the Library does. 
+
+      1. You may copy and distribute verbatim copies of the Library's complete 
+      source code as you receive it, in any medium, provided that you 
+      conspicuously and appropriately publish on each copy an appropriate 
+      copyright notice and disclaimer of warranty; keep intact all the notices 
+      that refer to this License and to the absence of any warranty; and 
+      distribute a copy of this License along with the Library. 
+
+      You may charge a fee for the physical act of transferring a copy, and you 
+      may at your option offer warranty protection in exchange for a fee. 
+
+      2. You may modify your copy or copies of the Library or any portion of it, 
+      thus forming a work based on the Library, and copy and distribute such 
+      modifications or work under the terms of Section 1 above, provided that 
+      you also meet all of these conditions: 
+
+        a) The modified work must itself be a software library. 
+
+        b) You must cause the files modified to carry prominent notices stating 
+        that you changed the files and the date of any change.
+
+        c) You must cause the whole of the work to be licensed at no charge to 
+        all third parties under the terms of this License. 
+
+        d) If a facility in the modified Library refers to a function or a table 
+        of data to be supplied by an application program that uses the facility, 
+        other than as an argument passed when the facility is invoked, then you 
+        must make a good faith effort to ensure that, in the event an 
+        application does not supply such function or table, the facility still 
+        operates, and performs whatever part of its purpose remains meaningful. 
+
+        (For example, a function in a library to compute square roots has a 
+        purpose that is entirely well-defined independent of the application. 
+        Therefore, Subsection 2d requires that any application-supplied function 
+        or table used by this function must be optional: if the application does 
+        not supply it, the square root function must still compute square 
+        roots.) 
+
+        These requirements apply to the modified work as a whole. If 
+        identifiable sections of that work are not derived from the Library, and 
+        can be reasonably considered independent and separate works in 
+        themselves, then this License, and its terms, do not apply to those 
+        sections when you distribute them as separate works. But when you 
+        distribute the same sections as part of a whole which is a work based on 
+        the Library, the distribution of the whole must be on the terms of this 
+        License, whose permissions for other licensees extend to the entire 
+        whole, and thus to each and every part regardless of who wrote it. 
+
+        Thus, it is not the intent of this section to claim rights or contest 
+        your rights to work written entirely by you; rather, the intent is to 
+        exercise the right to control the distribution of derivative or 
+        collective works based on the Library. 
+
+        In addition, mere aggregation of another work not based on the Library 
+        with the Library (or with a work based on the Library) on a volume of a 
+        storage or distribution medium does not bring the other work under the 
+        scope of this License. 
+
+      3. You may opt to apply the terms of the ordinary GNU General Public 
+      License instead of this License to a given copy of the Library. To do 
+      this, you must alter all the notices that refer to this License, so that 
+      they refer to the ordinary GNU General Public License, version 2, instead 
+      of to this License. (If a newer version than version 2 of the ordinary GNU 
+      General Public License has appeared, then you can specify that version 
+      instead if you wish.) Do not make any other change in these notices. 
+
+      Once this change is made in a given copy, it is irreversible for that 
+      copy, so the ordinary GNU General Public License applies to all subsequent 
+      copies and derivative works made from that copy. 
+
+      This option is useful when you wish to copy part of the code of the 
+      Library into a program that is not a library. 
+
+      4. You may copy and distribute the Library (or a portion or derivative of 
+      it, under Section 2) in object code or executable form under the terms of 
+      Sections 1 and 2 above provided that you accompany it with the complete 
+      corresponding machine-readable source code, which must be distributed 
+      under the terms of Sections 1 and 2 above on a medium customarily used for 
+      software interchange. 
+
+      If distribution of object code is made by offering access to copy from a 
+      designated place, then offering equivalent access to copy the source code 
+      from the same place satisfies the requirement to distribute the source 
+      code, even though third parties are not compelled to copy the source along 
+      with the object code.
+
+      5. A program that contains no derivative of any portion of the Library, 
+      but is designed to work with the Library by being compiled or linked with 
+      it, is called a "work that uses the Library". Such a work, in isolation, 
+      is not a derivative work of the Library, and therefore falls outside the 
+      scope of this License. 
+
+      However, linking a "work that uses the Library" with the Library creates 
+      an executable that is a derivative of the Library (because it contains 
+      portions of the Library), rather than a "work that uses the library". The 
+      executable is therefore covered by this License. Section 6 states terms 
+      for distribution of such executables. 
+
+      When a "work that uses the Library" uses material from a header file that 
+      is part of the Library, the object code for the work may be a derivative 
+      work of the Library even though the source code is not. Whether this is 
+      true is especially significant if the work can be linked without the 
+      Library, or if the work is itself a library. The threshold for this to be 
+      true is not precisely defined by law. 
+
+      If such an object file uses only numerical parameters, data structure 
+      layouts and accessors, and small macros and small inline functions (ten 
+      lines or less in length), then the use of the object file is unrestricted, 
+      regardless of whether it is legally a derivative work. (Executables 
+      containing this object code plus portions of the Library will still fall 
+      under Section 6.) 
+
+      Otherwise, if the work is a derivative of the Library, you may distribute 
+      the object code for the work under the terms of Section 6. Any executables 
+      containing that work also fall under Section 6, whether or not they are 
+      linked directly with the Library itself. 
+
+      6. As an exception to the Sections above, you may also combine or link a 
+      "work that uses the Library" with the Library to produce a work containing 
+      portions of the Library, and distribute that work under terms of your 
+      choice, provided that the terms permit modification of the work for the 
+      customer's own use and reverse engineering for debugging such 
+      modifications.
+ 
+      You must give prominent notice with each copy of the work that the Library 
+      is used in it and that the Library and its use are covered by this 
+      License. You must supply a copy of this License. If the work during 
+      execution displays copyright notices, you must include the copyright 
+      notice for the Library among them, as well as a reference directing the 
+      user to the copy of this License. Also, you must do one of these things: 
+
+        a) Accompany the work with the complete corresponding machine-readable 
+        source code for the Library including whatever changes were used in the 
+        work (which must be distributed under Sections 1 and 2 above); and, if 
+        the work is an executable linked with the Library, with the complete 
+        machine-readable "work that uses the Library", as object code and/or 
+        source code, so that the user can modify the Library and then relink to 
+        produce a modified executable containing the modified Library. (It is 
+        understood that the user who changes the contents of definitions files 
+        in the Library will not necessarily be able to recompile the application 
+        to use the modified definitions.) 
+
+        b) Use a suitable shared library mechanism for linking with the Library. 
+        A suitable mechanism is one that (1) uses at run time a copy of the 
+        library already present on the user's computer system, rather than 
+        copying library functions into the executable, and (2) will operate 
+        properly with a modified version of the library, if the user installs 
+        one, as long as the modified version is interface-compatible with the 
+        version that the work was made with. 
+
+        c) Accompany the work with a written offer, valid for at least three 
+        years, to give the same user the materials specified in Subsection 6a, 
+        above, for a charge no more than the cost of performing this 
+        distribution. 
+
+        d) If distribution of the work is made by offering access to copy from a 
+        designated place, offer equivalent access to copy the above specified 
+        materials from the same place.
+ 
+        e) Verify that the user has already received a copy of these materials 
+        or that you have already sent this user a copy.
+
+      For an executable, the required form of the "work that uses the Library" 
+      must include any data and utility programs needed for reproducing the 
+      executable from it. However, as a special exception, the materials to be 
+      distributed need not include anything that is normally distributed (in 
+      either source or binary form) with the major components (compiler, kernel, 
+      and so on) of the operating system on which the executable runs, unless 
+      that component itself accompanies the executable.
+ 
+      It may happen that this requirement contradicts the license restrictions 
+      of other proprietary libraries that do not normally accompany the 
+      operating system. Such a contradiction means you cannot use both them and 
+      the Library together in an executable that you distribute. 
+
+      7. You may place library facilities that are a work based on the Library 
+      side-by-side in a single library together with other library facilities 
+      not covered by this License, and distribute such a combined library, 
+      provided that the separate distribution of the work based on the Library 
+      and of the other library facilities is otherwise permitted, and provided 
+      that you do these two things: 
+
+        a) Accompany the combined library with a copy of the same work based on 
+        the Library, uncombined with any other library facilities. This must be 
+        distributed under the terms of the Sections above. 
+
+        b) Give prominent notice with the combined library of the fact that part 
+        of it is a work based on the Library, and explaining where to find the 
+        accompanying uncombined form of the same work.
+
+      8. You may not copy, modify, sublicense, link with, or distribute the 
+      Library except as expressly provided under this License. Any attempt 
+      otherwise to copy, modify, sublicense, link with, or distribute the 
+      Library is void, and will automatically terminate your rights under this 
+      License. However, parties who have received copies, or rights, from you 
+      under this License will not have their licenses terminated so long as such 
+      parties remain in full compliance. 
+
+      9. You are not required to accept this License, since you have not signed 
+      it. However, nothing else grants you permission to modify or distribute 
+      the Library or its derivative works. These actions are prohibited by law 
+      if you do not accept this License. Therefore, by modifying or distributing 
+      the Library (or any work based on the Library), you indicate your 
+      acceptance of this License to do so, and all its terms and conditions for 
+      copying, distributing or modifying the Library or works based on it.
+ 
+      10. Each time you redistribute the Library (or any work based on the 
+      Library), the recipient automatically receives a license from the original 
+      licensor to copy, distribute, link with or modify the Library subject to 
+      these terms and conditions. You may not impose any further restrictions on 
+      the recipients' exercise of the rights granted herein. You are not 
+      responsible for enforcing compliance by third parties with this License. 
+
+      11. If, as a consequence of a court judgment or allegation of patent 
+      infringement or for any other reason (not limited to patent issues), 
+      conditions are imposed on you (whether by court order, agreement or 
+      otherwise) that contradict the conditions of this License, they do not 
+      excuse you from the conditions of this License. If you cannot distribute 
+      so as to satisfy simultaneously your obligations under this License and 
+      any other pertinent obligations, then as a consequence you may not 
+      distribute the Library at all. For example, if a patent license would not 
+      permit royalty-free redistribution of the Library by all those who receive 
+      copies directly or indirectly through you, then the only way you could 
+      satisfy both it and this License would be to refrain entirely from 
+      distribution of the Library. 
+
+      If any portion of this section is held invalid or unenforceable under any 
+      particular circumstance, the balance of the section is intended to apply, 
+      and the section as a whole is intended to apply in other circumstances. 
+
+      It is not the purpose of this section to induce you to infringe any 
+      patents or other property right claims or to contest validity of any such 
+      claims; this section has the sole purpose of protecting the integrity of 
+      the free software distribution system which is implemented by public 
+      license practices. Many people have made generous contributions to the 
+      wide range of software distributed through that system in reliance on 
+      consistent application of that system; it is up to the author/donor to 
+      decide if he or she is willing to distribute software through any other 
+      system and a licensee cannot impose that choice. 
+
+      This section is intended to make thoroughly clear what is believed to be a 
+      consequence of the rest of this License. 
+
+      12. If the distribution and/or use of the Library is restricted in certain 
+      countries either by patents or by copyrighted interfaces, the original 
+      copyright holder who places the Library under this License may add an 
+      explicit geographical distribution limitation excluding those countries, 
+      so that distribution is permitted only in or among countries not thus 
+      excluded. In such case, this License incorporates the limitation as if 
+      written in the body of this License. 
+
+      13. The Free Software Foundation may publish revised and/or new versions 
+      of the Lesser General Public License from time to time. Such new versions 
+      will be similar in spirit to the present version, but may differ in detail 
+      to address new problems or concerns.
+
+      Each version is given a distinguishing version number. If the Library 
+      specifies a version number of this License which applies to it and "any 
+      later version", you have the option of following the terms and conditions 
+      either of that version or of any later version published by the Free 
+      Software Foundation. If the Library does not specify a license version 
+      number, you may choose any version ever published by the Free Software 
+      Foundation. 
+
+      14. If you wish to incorporate parts of the Library into other free 
+      programs whose distribution conditions are incompatible with these, write 
+      to the author to ask for permission. For software which is copyrighted by 
+      the Free Software Foundation, write to the Free Software Foundation; we 
+      sometimes make exceptions for this. Our decision will be guided by the two 
+      goals of preserving the free status of all derivatives of our free 
+      software and of promoting the sharing and reuse of software generally. 
+
+      NO WARRANTY 
+
+      15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY 
+      FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN 
+      OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES 
+      PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED 
+      OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+      MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS 
+      TO THE QUALITY AND PERFORMANCE OF THE LIBRARY IS WITH YOU. SHOULD THE 
+      LIBRARY PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 
+      REPAIR OR CORRECTION. 
+
+      16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 
+      WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 
+      REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 
+      INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES 
+      ARISING OUT OF THE USE OR INABILITY TO USE THE LIBRARY (INCLUDING BUT NOT 
+      LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES 
+      SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE LIBRARY TO OPERATE 
+      WITH ANY OTHER SOFTWARE), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN 
+      ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ 
+      END OF TERMS AND CONDITIONS
+
+ 
diff --git a/libsysfs/Makefile b/libsysfs/Makefile
new file mode 100644
index 0000000000..cf07a842b6
--- /dev/null
+++ b/libsysfs/Makefile
@@ -0,0 +1,44 @@
+# Makefile for libsysfs.a
+# Copyright (c) International Business Machines Corp., 2003
+
+CC=gcc
+
+H_INCLUDE=../include
+LIB_INCLUDE=.
+OBJS=sysfs_bus.o sysfs_class.o sysfs_device.o sysfs_dir.o sysfs_driver.o \
+	sysfs_utils.o
+
+# Install directory
+
+# Options
+CFLAGS=-O2 -Wall -ansi -g
+
+# sysfs library
+LIBSYSFS=libsysfs.a
+
+RM=rm -f
+
+libsysfs.a: $(OBJS)
+	ar cru $(LIBSYSFS) $(OBJS)
+	ranlib $(LIBSYSFS)
+
+sysfs_bus.o: sysfs_bus.c
+	$(CC) -I$(H_INCLUDE) -I$(LIB_INCLUDE) $(CFLAGS) -c sysfs_bus.c
+
+sysfs_class.o: sysfs_class.c
+	$(CC) -I$(H_INCLUDE) -I$(LIB_INCLUDE) $(CFLAGS) -c sysfs_class.c
+
+sysfs_device.o: sysfs_device.c
+	$(CC) -I$(H_INCLUDE) -I$(LIB_INCLUDE) $(CFLAGS) -c sysfs_device.c
+
+sysfs_dir.o: sysfs_dir.c
+	$(CC) -I$(H_INCLUDE) -I$(LIB_INCLUDE) $(CFLAGS) -c sysfs_dir.c
+
+sysfs_driver.o: sysfs_driver.c
+	$(CC) -I$(H_INCLUDE) -I$(LIB_INCLUDE) $(CFLAGS) -c sysfs_driver.c
+
+sysfs_utils.o: sysfs_utils.c
+	$(CC) -I$(H_INCLUDE) -I$(LIB_INCLUDE) $(CFLAGS) -c sysfs_utils.c
+
+clean:
+	$(RM) *.o *~ core $(LIBSYSFS)
diff --git a/libsysfs/libsysfs.h b/libsysfs/libsysfs.h
new file mode 100644
index 0000000000..01143954e7
--- /dev/null
+++ b/libsysfs/libsysfs.h
@@ -0,0 +1,162 @@
+/*
+ * libsysfs.h
+ *
+ * Header Definitions for libsysfs
+ *
+ * Copyright (C) 2003 International Business Machines, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#ifndef _LIBSYSFS_H_
+#define _LIBSYSFS_H_
+
+#include <sys/types.h>
+
+/*
+ * Generic #defines go here..
+ */ 
+#define SYSFS_FSTYPE_NAME	"sysfs"
+#define SYSFS_PROC_MNTS		"/proc/mounts"
+#define SYSFS_BUS_DIR		"/bus"
+#define SYSFS_CLASS_DIR		"/class"
+#define SYSFS_DEVICES_DIR	"/devices"
+#define SYSFS_DEVICES_NAME	"devices"
+#define SYSFS_DRIVERS_DIR	"/drivers"
+#define SYSFS_DRIVERS_NAME	"drivers"
+#define SYSFS_NAME_ATTRIBUTE	"name"
+
+#define SYSFS_PATH_MAX		255
+#define	SYSFS_NAME_LEN		50
+#define SYSFS_BUS_ID_SIZE	20
+
+#define SYSFS_METHOD_SHOW	0x01	/* attr can be read by user */
+#define SYSFS_METHOD_STORE	0x02	/* attr can be changed by user */
+
+struct sysfs_attribute {
+	struct sysfs_attribute *next;
+	char path[SYSFS_PATH_MAX];
+	char *value;
+	unsigned short len;		/* value length */
+	unsigned short method;		/* show and store */
+};
+
+struct sysfs_dlink {
+	struct sysfs_dlink *next;
+	char name[SYSFS_NAME_LEN];
+	struct sysfs_directory *target;
+};
+
+struct sysfs_directory {
+	struct sysfs_directory *next;
+	char path[SYSFS_PATH_MAX];
+	struct sysfs_directory *subdirs;
+	struct sysfs_dlink *links;
+	struct sysfs_attribute *attributes;
+};
+
+struct sysfs_driver {
+	struct sysfs_driver *next;
+	char name[SYSFS_NAME_LEN];
+	struct sysfs_directory *directory;
+	struct sysfs_device *device;
+};
+
+struct sysfs_device {
+	struct sysfs_device *next;
+	char name[SYSFS_NAME_LEN];
+	char bus_id[SYSFS_NAME_LEN];
+	struct sysfs_driver *driver;
+	struct sysfs_directory *directory;
+	struct sysfs_device *parent;
+	struct sysfs_device *children;
+};
+
+struct sysfs_bus {
+	struct sysfs_bus *next;
+	char name[SYSFS_NAME_LEN];
+	struct sysfs_directory *directory;
+	struct sysfs_driver *drivers;
+	struct sysfs_device *devices;
+};
+
+struct sysfs_class_device {
+	struct sysfs_class_device *next;
+	char name[SYSFS_NAME_LEN];
+	struct sysfs_directory *directory;
+	struct sysfs_device *sysdevice;		/* NULL if virtual */
+	struct sysfs_driver *driver;		/* NULL if not implemented */
+};
+
+struct sysfs_class {
+	struct sysfs_class *next;
+	char name[SYSFS_NAME_LEN];
+	struct sysfs_directory *directory;
+	struct sysfs_class_device *devices;
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Function Prototypes
+ */
+extern int sysfs_get_mnt_path(char *mnt_path, size_t len);
+extern int sysfs_get_name_from_path(const char *path, char *name, size_t len);
+extern int sysfs_get_link(const char *path, char *target, size_t len);
+
+/* sysfs directory and file access */
+extern void sysfs_close_attribute(struct sysfs_attribute *sysattr);
+extern struct sysfs_attribute *sysfs_open_attribute(const char *path);
+extern int sysfs_read_attribute(struct sysfs_attribute *sysattr);
+extern int sysfs_read_attribute_value(const char *attrpath, char *value, 
+								size_t vsize);
+extern char *sysfs_get_value_from_attributes(struct sysfs_attribute *attr, 
+							const char * name);
+extern void sysfs_close_directory(struct sysfs_directory *sysdir);
+extern struct sysfs_directory *sysfs_open_directory(const char *path);
+extern int sysfs_read_directory(struct sysfs_directory *sysdir);
+extern void sysfs_close_dlink(struct sysfs_dlink *dlink);
+extern struct sysfs_dlink *sysfs_open_dlink(const char *linkpath);
+extern int sysfs_read_dlinks(struct sysfs_dlink *dlink);
+
+/* sysfs driver access */
+extern void sysfs_close_driver(struct sysfs_driver *driver);
+extern struct sysfs_driver *sysfs_open_driver(const char *path);
+
+/* generic sysfs device access */
+extern void sysfs_close_device(struct sysfs_device *dev);
+extern void sysfs_close_device_tree(struct sysfs_device *dev);
+extern struct sysfs_device *sysfs_open_device(const char *path);
+extern struct sysfs_device *sysfs_open_device_tree(const char *path);
+extern struct sysfs_attribute *sysfs_get_device_attr
+				(struct sysfs_device *dev, const char *name);
+
+/* generic sysfs bus access */
+extern void sysfs_close_bus(struct sysfs_bus *bus);
+extern struct sysfs_bus *sysfs_open_bus(const char *name);
+
+/* generic sysfs class access */
+extern void sysfs_close_class_device(struct sysfs_class_device *dev);
+extern struct sysfs_class_device *sysfs_open_class_device(const char *path);
+extern void sysfs_close_class(struct sysfs_class *cls);
+extern struct sysfs_class *sysfs_open_class(const char *name);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _LIBSYSFS_H_ */
diff --git a/libsysfs/sysfs.h b/libsysfs/sysfs.h
new file mode 100644
index 0000000000..eb2a002958
--- /dev/null
+++ b/libsysfs/sysfs.h
@@ -0,0 +1,49 @@
+/*
+ * sysfs.h
+ *
+ * Internal Header Definitions for libsysfs
+ *
+ * Copyright (C) 2003 International Business Machines, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#ifndef _SYSFS_H_
+#define _SYSFS_H_
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <mntent.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+/* external library functions */
+extern int lstat(const char *file_name, struct stat *buf);
+extern int readlink(const char *path, char *buf, size_t bufsize);
+extern int getpagesize(void);
+extern int isascii(int c);
+
+/* Debugging */
+#ifdef DEBUG
+#define dprintf(format, arg...) fprintf(stderr, format, ## arg)
+#else
+#define dprintf(format, arg...) do { } while (0)
+#endif
+
+#endif /* _SYSFS_H_ */
diff --git a/libsysfs/sysfs_bus.c b/libsysfs/sysfs_bus.c
new file mode 100644
index 0000000000..b2e2b2dd71
--- /dev/null
+++ b/libsysfs/sysfs_bus.c
@@ -0,0 +1,301 @@
+/*
+ * sysfs_bus.c
+ *
+ * Generic bus utility functions for libsysfs
+ *
+ * Copyright (C) 2003 International Business Machines, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include "libsysfs.h"
+#include "sysfs.h"
+
+/**
+ * sysfs_close_bus: close single bus
+ * @bus: bus structure
+ */
+void sysfs_close_bus(struct sysfs_bus *bus)
+{
+	struct sysfs_device *curdev = NULL, *nextdev = NULL;
+	struct sysfs_driver *curdrv = NULL, *nextdrv = NULL;
+
+	if (bus != NULL) {
+		if (bus->directory != NULL)
+			sysfs_close_directory(bus->directory);
+		for (curdev = bus->devices; curdev != NULL;
+		     curdev = nextdev) {
+			nextdev = curdev->next;
+			sysfs_close_device(curdev);
+		}
+		for (curdrv = bus->drivers; curdrv != NULL;
+		     curdrv = nextdrv) {
+			nextdrv = curdrv->next;
+			sysfs_close_driver(curdrv);
+		}
+		free(bus);
+	}
+}
+
+/**
+ * alloc_bus: mallocs new bus structure
+ * returns sysfs_bus_bus struct or NULL
+ */
+static struct sysfs_bus *alloc_bus(void)
+{
+	return (struct sysfs_bus *)calloc(1, sizeof(struct sysfs_bus));
+}
+
+/**
+ * open_bus_dir: opens up sysfs bus directory
+ * returns sysfs_directory struct with success and NULL with error
+ */
+static struct sysfs_directory *open_bus_dir(const char *name)
+{
+	struct sysfs_directory *busdir = NULL, *cur = NULL, *next = NULL;
+	char buspath[SYSFS_PATH_MAX];
+
+	if (name == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	memset(buspath, 0, SYSFS_PATH_MAX);
+	if ((sysfs_get_mnt_path(buspath, SYSFS_PATH_MAX)) != 0) {
+		dprintf(stderr, "Sysfs not supported on this system\n");
+		return NULL;
+	}
+
+	strcat(buspath, SYSFS_BUS_DIR);
+	strcat(buspath, "/");
+	strcat(buspath, name);
+	busdir = sysfs_open_directory(buspath);
+	if (busdir == NULL) {
+		errno = EINVAL;
+		dprintf(stderr,"Bus %s not supported on this system\n",
+			name);
+		return NULL;
+	}
+	if ((sysfs_read_directory(busdir)) != 0) {
+		dprintf(stderr, "Error reading %s bus dir %s\n", name, 
+			buspath);
+		sysfs_close_directory(busdir);
+		return NULL;
+	}
+	/* read in devices and drivers subdirs */
+	for (cur = busdir->subdirs; cur != NULL; cur = next) {
+		next = cur->next;
+		if ((sysfs_read_directory(cur)) != 0)
+			continue;
+	}
+
+	return busdir;
+}
+
+/**
+ * add_dev_to_bus: adds a bus device to bus device list
+ * @bus: bus to add the device
+ * @dev: device to add
+ */
+static void add_dev_to_bus(struct sysfs_bus *bus, struct sysfs_device *dev)
+{
+	if (bus != NULL && dev != NULL) {
+		dev->next = bus->devices;
+		bus->devices = dev;
+	}
+}
+
+/**
+ * add_driver_to_bus: adds a bus driver to bus driver list
+ * @bus: bus to add driver to
+ * @driver: driver to add
+ */
+static void add_driver_to_bus(struct sysfs_bus *bus, 
+				struct sysfs_driver *driver)
+{
+	if (bus != NULL && driver != NULL) {
+		driver->next = bus->drivers;
+		bus->drivers = driver;
+	}
+}
+
+/**
+ * get_all_bus_devices: gets all devices for bus
+ * @bus: bus to get devices for
+ * returns 0 with success and -1 with failure
+ */
+static int get_all_bus_devices(struct sysfs_bus *bus)
+{
+	struct sysfs_device *bdev = NULL;
+	struct sysfs_directory *cur = NULL;
+	struct sysfs_dlink *curl = NULL, *nextl = NULL;
+	char dirname[SYSFS_NAME_LEN];
+
+	if (bus == NULL || bus->directory == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+	for (cur = bus->directory->subdirs; cur != NULL; cur = cur->next) {
+		memset(dirname, 0, SYSFS_NAME_LEN);
+		if ((sysfs_get_name_from_path(cur->path, dirname,
+		    SYSFS_NAME_LEN)) != 0)
+			continue;
+		if (strcmp(dirname, SYSFS_DEVICES_NAME) != 0)
+			continue;
+		for (curl = cur->links; curl != NULL; curl = nextl) {
+			nextl = curl->next;
+			bdev = sysfs_open_device(curl->target->path);
+			if (bdev == NULL) {
+				dprintf(stderr, "Error opening device at %s\n",
+					curl->target->path);
+				continue;
+			}
+			add_dev_to_bus(bus, bdev);
+		}
+	}
+			
+	return 0;
+}
+
+/**
+ * get_all_bus_drivers: get all pci drivers
+ * @bus: pci bus to add drivers to
+ * returns 0 with success and -1 with error
+ */
+static int get_all_bus_drivers(struct sysfs_bus *bus)
+{
+	struct sysfs_driver *driver = NULL;
+	struct sysfs_directory *cur = NULL, *next = NULL;
+	struct sysfs_directory *cursub = NULL, *nextsub = NULL;
+	char dirname[SYSFS_NAME_LEN];
+
+	if (bus == NULL || bus->directory == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+	for (cur = bus->directory->subdirs; cur != NULL; cur = next) {
+		next = cur->next;
+		memset(dirname, 0, SYSFS_NAME_LEN);
+		if ((sysfs_get_name_from_path(cur->path, dirname,
+		    SYSFS_NAME_LEN)) != 0)
+			continue;
+		if (strcmp(dirname, SYSFS_DRIVERS_NAME) != 0)
+			continue;
+		for (cursub = cur->subdirs; cursub != NULL; cursub = nextsub) {
+			nextsub = cursub->next;
+			driver = sysfs_open_driver(cursub->path);
+			if (driver == NULL) {
+				dprintf(stderr, "Error opening driver at %s\n",
+					cursub->path);
+				continue;
+			}
+			add_driver_to_bus(bus, driver);
+		}
+	}
+	
+	return 0;
+}
+
+/**
+ * match_bus_device_to_driver: returns 1 if device is bound to driver
+ * @driver: driver to match
+ * @busid: busid of device to match
+ * returns 1 if found and 0 if not found
+ */
+static int match_bus_device_to_driver(struct sysfs_driver *driver, char *busid)
+{
+	struct sysfs_dlink *cur = NULL, *next = NULL;
+	int found = 0;
+
+	if (driver == NULL || driver->directory == NULL || busid == NULL) {
+		errno = EINVAL;
+		return found;
+	}
+	for (cur = driver->directory->links; cur != NULL && found == 0;
+	     cur = next) {
+		next = cur->next;
+		if ((strcmp(cur->name, busid)) == 0)
+			found++;
+	}
+	return found;
+}
+
+/**
+ * link_bus_devices_to_drivers: goes through and links devices to drivers
+ * @bus: bus to link
+ */
+static void link_bus_devices_to_drivers(struct sysfs_bus *bus)
+{
+	struct sysfs_device *dev = NULL, *nextdev = NULL;
+	struct sysfs_driver *drv = NULL, *nextdrv = NULL;
+	
+	if (bus != NULL && bus->devices != NULL && bus->drivers != NULL) {
+		for (dev = bus->devices; dev != NULL; dev = nextdev) {
+			nextdev = dev->next;
+
+			for (drv = bus->drivers; drv != NULL; drv = nextdrv) {
+				nextdrv = drv->next;
+				if ((match_bus_device_to_driver(drv, 
+				    dev->bus_id)) != 0) {
+					dev->driver = drv;
+					drv->device = dev;
+				}
+			}
+		}
+	}
+}
+
+/**
+ * sysfs_open_bus: opens specific bus and all its devices on system
+ * returns sysfs_bus structure with success or NULL with error.
+ */
+struct sysfs_bus *sysfs_open_bus(const char *name)
+{
+	struct sysfs_bus *bus = NULL;
+	struct sysfs_directory *busdir = NULL;
+
+	if (name == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	bus = alloc_bus();
+	if (bus == NULL) {
+		perror("malloc");
+		return NULL;
+	}
+	strcpy(bus->name, name);	
+	busdir = open_bus_dir(name);
+	if (busdir == NULL) {
+		dprintf(stderr,"Invalid bus, %s not supported on this system\n",
+			name);
+		sysfs_close_bus(bus);
+		return NULL;
+	}
+	bus->directory = busdir;
+	if ((get_all_bus_devices(bus)) != 0) {
+		dprintf(stderr, "Error reading %s bus devices\n", name);
+		sysfs_close_bus(bus);
+		return NULL;
+	}
+	if ((get_all_bus_drivers(bus)) != 0) {
+		dprintf(stderr, "Error reading %s bus drivers\n", name);
+		sysfs_close_bus(bus);
+		return NULL;
+	}
+	link_bus_devices_to_drivers(bus);
+
+	return bus;
+}
diff --git a/libsysfs/sysfs_class.c b/libsysfs/sysfs_class.c
new file mode 100644
index 0000000000..9d7d8b2227
--- /dev/null
+++ b/libsysfs/sysfs_class.c
@@ -0,0 +1,273 @@
+/*
+ * sysfs_class.c
+ *
+ * Generic class utility functions for libsysfs
+ *
+ * Copyright (C) 2003 International Business Machines, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include "libsysfs.h"
+#include "sysfs.h"
+
+/**
+ * sysfs_close_class_device: closes a single class device.
+ * @dev: class device to close.
+ */
+void sysfs_close_class_device(struct sysfs_class_device *dev)
+{
+	if (dev != NULL) {
+		if (dev->directory != NULL)
+			sysfs_close_directory(dev->directory);
+		if (dev->sysdevice != NULL)
+			sysfs_close_device(dev->sysdevice);
+		if (dev->driver != NULL)
+			sysfs_close_driver(dev->driver);
+		free(dev);
+	}
+}
+
+/**
+ * sysfs_close_class: close single class
+ * @class: class structure
+ */
+void sysfs_close_class(struct sysfs_class *cls)
+{
+	struct sysfs_class_device *cur = NULL, *next = NULL;
+
+	if (cls != NULL) {
+		if (cls->directory != NULL)
+			sysfs_close_directory(cls->directory);
+		for (cur = cls->devices; cur != NULL; cur = next) {
+			next = cur->next;
+			sysfs_close_class_device(cur);
+		}
+		free(cls);
+	}
+}
+
+/**
+ * alloc_class_device: mallocs and initializes new class device struct.
+ * returns sysfs_class_device or NULL.
+ */
+static struct sysfs_class_device *alloc_class_device(void)
+{
+	return (struct sysfs_class_device *)
+				calloc(1, sizeof(struct sysfs_class_device));
+}
+
+/**
+ * alloc_class: mallocs new class structure
+ * returns sysfs_class struct or NULL
+ */
+static struct sysfs_class *alloc_class(void)
+{
+	return (struct sysfs_class *)calloc(1, sizeof(struct sysfs_class));
+}
+
+/**
+ * open_class_dir: opens up sysfs class directory
+ * returns sysfs_directory struct with success and NULL with error
+ */
+static struct sysfs_directory *open_class_dir(const char *name)
+{
+	struct sysfs_directory *classdir = NULL;
+	char classpath[SYSFS_PATH_MAX];
+
+	if (name == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	memset(classpath, 0, SYSFS_PATH_MAX);
+	if ((sysfs_get_mnt_path(classpath, SYSFS_PATH_MAX)) != 0) {
+		dprintf(stderr, "Sysfs not supported on this system\n");
+		return NULL;
+	}
+
+	strcat(classpath, SYSFS_CLASS_DIR);
+	strcat(classpath, "/");
+	strcat(classpath, name);
+	classdir = sysfs_open_directory(classpath);
+	if (classdir == NULL) {
+		errno = EINVAL;
+		dprintf(stderr,"Class %s not supported on this system\n",
+			name);
+		return NULL;
+	}
+	if ((sysfs_read_directory(classdir)) != 0) {
+		dprintf(stderr, "Error reading %s class dir %s\n", name, 
+			classpath);
+		sysfs_close_directory(classdir);
+		return NULL;
+	}
+
+	return classdir;
+}
+
+/**
+ * sysfs_open_class_device: Opens and populates class device
+ * @path: path to class device.
+ * returns struct sysfs_class_device with success and NULL with error.
+ */
+struct sysfs_class_device *sysfs_open_class_device(const char *path)
+{
+	struct sysfs_class_device *cdev = NULL;
+	struct sysfs_directory *dir = NULL, *cur = NULL;
+	struct sysfs_dlink *curl = NULL;
+	struct sysfs_device *sdev = NULL;
+	struct sysfs_driver *drv = NULL;
+	char temp[SYSFS_NAME_LEN];
+
+	if (path == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	cdev = alloc_class_device();
+	if (cdev == NULL) {
+		perror("malloc");
+		return NULL;
+	}
+	memset(temp, 0, SYSFS_NAME_LEN);
+	if ((sysfs_get_name_from_path(path, temp, SYSFS_NAME_LEN)) != 0) {
+		errno = EINVAL;
+		dprintf(stderr, "Invalid class device path %s\n", path);
+		sysfs_close_class_device(cdev);
+		return NULL;
+	}
+	strcpy(cdev->name, temp);
+
+	dir = sysfs_open_directory(path);
+	if (dir == NULL) {
+		dprintf(stderr, "Error opening class device at %s\n", path);
+		sysfs_close_class_device(cdev);
+		return NULL;
+	}
+	if ((sysfs_read_directory(dir)) != 0) {
+		dprintf(stderr, "Error reading class device at %s\n", path);
+		sysfs_close_directory(dir);
+		sysfs_close_class_device(cdev);
+		return NULL;
+	}
+	cdev->directory = dir;
+
+	cur = cdev->directory->subdirs;
+	while(cur != NULL) {
+		sysfs_read_directory(cur);
+		cur = cur->next;
+	}
+	/* get driver and device, if implemented */
+	curl = cdev->directory->links;
+	while (curl != NULL) {
+		if (strncmp(curl->name, SYSFS_DEVICES_NAME, 6) == 0) {
+			sdev = sysfs_open_device(curl->target->path);
+			if (sdev != NULL) {
+				cdev->sysdevice = sdev;
+				if (cdev->driver != NULL) 
+					sdev->driver = cdev->driver;
+			}
+		} else if (strncmp(curl->name, SYSFS_DRIVERS_NAME, 6) == 0) {
+			drv = sysfs_open_driver(curl->target->path);
+			if (drv != NULL) {
+				cdev->driver = drv;
+				if (cdev->sysdevice != NULL) 
+					drv->device = cdev->sysdevice;
+			}
+		}
+		curl = curl->next;
+	}
+	return cdev;
+}
+
+/**
+ * add_dev_to_class: adds a class device to class list
+ * @class: class to add the device
+ * @dev: device to add
+ */
+static void add_dev_to_class(struct sysfs_class *cls, 
+					struct sysfs_class_device *dev)
+{
+	if (cls != NULL && dev != NULL) {
+		dev->next = cls->devices;
+		cls->devices = dev;
+	}
+}
+
+/**
+ * get_all_class_devices: gets all devices for class
+ * @class: class to get devices for
+ * returns 0 with success and -1 with failure
+ */
+static int get_all_class_devices(struct sysfs_class *cls)
+{
+	struct sysfs_class_device *dev = NULL;
+	struct sysfs_directory *cur = NULL, *next = NULL;
+
+	if (cls == NULL || cls->directory == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+	for (cur = cls->directory->subdirs; cur != NULL; cur = next) {
+		next = cur->next;
+		dev = sysfs_open_class_device(cur->path);
+		if (dev == NULL) {
+			dprintf(stderr, "Error opening device at %s\n",
+				cur->path);
+			continue;
+		}
+		add_dev_to_class(cls, dev);
+	}
+			
+	return 0;
+}
+
+/**
+ * sysfs_open_class: opens specific class and all its devices on system
+ * returns sysfs_class structure with success or NULL with error.
+ */
+struct sysfs_class *sysfs_open_class(const char *name)
+{
+	struct sysfs_class *cls = NULL;
+	struct sysfs_directory *classdir = NULL;
+
+	if (name == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	cls = alloc_class();
+	if (cls == NULL) {
+		perror("malloc");
+		return NULL;
+	}
+	strcpy(cls->name, name);	
+	classdir = open_class_dir(name);
+	if (classdir == NULL) {
+		dprintf(stderr,
+			"Invalid class, %s not supported on this system\n",
+			name);
+		sysfs_close_class(cls);
+		return NULL;
+	}
+	cls->directory = classdir;
+	if ((get_all_class_devices(cls)) != 0) {
+		dprintf(stderr, "Error reading %s class devices\n", name);
+		sysfs_close_class(cls);
+		return NULL;
+	}
+
+	return cls;
+}
diff --git a/libsysfs/sysfs_device.c b/libsysfs/sysfs_device.c
new file mode 100644
index 0000000000..185b5cf378
--- /dev/null
+++ b/libsysfs/sysfs_device.c
@@ -0,0 +1,199 @@
+/*
+ * sysfs_device.c
+ *
+ * Generic device utility functions for libsysfs
+ *
+ * Copyright (C) 2003 International Business Machines, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include "libsysfs.h"
+#include "sysfs.h"
+
+/**
+ * sysfs_close_device: closes and cleans up a device
+ * @dev = device to clean up
+ */
+void sysfs_close_device(struct sysfs_device *dev)
+{
+	if (dev != NULL) {
+		dev->next = NULL;
+		dev->driver = NULL;
+		if (dev->directory != NULL)
+			sysfs_close_directory(dev->directory);
+		dev->children = NULL;
+		free(dev);
+	}
+}
+
+/**
+ * alloc_device: allocates and initializes device structure
+ * returns struct sysfs_device
+ */
+static struct sysfs_device *alloc_device(void)
+{
+	return (struct sysfs_device *)calloc(1, sizeof(struct sysfs_device));
+}
+
+/**
+ * sysfs_get_device_attr: searches dev's attributes by name
+ * @dev: device to look through
+ * @name: attribute name to get
+ * returns sysfs_attribute reference with success or NULL with error.
+ */
+struct sysfs_attribute *sysfs_get_device_attr(struct sysfs_device *dev,
+						const char *name)
+{
+	struct sysfs_attribute *cur = NULL;
+	char attrname[SYSFS_NAME_LEN];
+
+	if (dev == NULL || dev->directory == NULL || name == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	for (cur = dev->directory->attributes; cur != NULL; cur = cur->next) {
+		if ((sysfs_get_name_from_path(cur->path, attrname, 
+		    SYSFS_NAME_LEN)) != 0) 
+			continue;
+		if (strcmp(name, attrname) != 0)
+			continue;
+
+		return cur;
+	}
+
+	return NULL;
+}
+
+/**
+ * sysfs_open_device: opens and populates device structure
+ * @path: path to device, this is the /sys/devices/ path
+ * returns sysfs_device structure with success or NULL with error
+ */
+struct sysfs_device *sysfs_open_device(const char *path)
+{
+	struct sysfs_device *dev = NULL;
+	struct sysfs_directory *sdir = NULL;
+	char *p = NULL;
+
+	if (path == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	dev = alloc_device();	
+	if (dev == NULL) {
+		dprintf(stderr, "Error allocating device at %s\n", path);
+		return NULL;
+	}
+	sdir = sysfs_open_directory(path);
+	if (sdir == NULL) {
+		dprintf(stderr, "Invalid device at %s\n", path);
+		errno = EINVAL;
+		sysfs_close_device(dev);
+		return NULL;
+	}
+	if ((sysfs_read_directory(sdir)) != 0) {
+		dprintf(stderr, "Error reading device directory at %s\n", path);
+		sysfs_close_directory(sdir);
+		sysfs_close_device(dev);
+		return NULL;
+	}
+	dev->directory = sdir;
+	sysfs_get_name_from_path(sdir->path, dev->bus_id, SYSFS_NAME_LEN);
+	/* get device name */
+	p = sysfs_get_value_from_attributes(sdir->attributes,	
+							SYSFS_NAME_ATTRIBUTE);
+	if (p != NULL) {
+		strncpy(dev->name, p, SYSFS_NAME_LEN);
+		p = dev->name + strlen(dev->name) - 1;
+		if ((strlen(dev->name) > 0) && *p == '\n')
+			*p = '\0';
+	}
+
+	return dev;
+}
+
+/**
+ * sysfs_close_device_tree: closes every device in the supplied tree, 
+ * 	closing children only.
+ * @devroot: device root of tree.
+ */
+void sysfs_close_device_tree(struct sysfs_device *devroot)
+{
+	if (devroot != NULL) {
+		if (devroot->children != NULL) {
+			struct sysfs_device *child = NULL, *next = NULL;
+	
+			for (child = devroot->children; child != NULL;
+			     child = next) {
+				next = child->next;
+				sysfs_close_device_tree(child);
+			}
+		}
+		sysfs_close_device(devroot);
+	}
+}
+
+/**
+ * add_device_child_to_parent: adds child device to parent
+ * @parent: parent device.
+ * @child: child device to add.
+ */
+static void add_device_child_to_parent(struct sysfs_device *parent,
+					struct sysfs_device *child)
+{
+	if (parent != NULL && child != NULL) {
+		child->next = parent->children;
+		parent->children = child;
+		child->parent = parent;
+	}
+}
+
+/**
+ * sysfs_open_device_tree: opens root device and all of its children,
+ *	creating a tree of devices. Only opens children.
+ * @path: sysfs path to devices
+ * returns struct sysfs_device and its children with success or NULL with
+ *	error.
+ */
+struct sysfs_device *sysfs_open_device_tree(const char *path)
+{
+	struct sysfs_device *rootdev = NULL, *new = NULL;
+	struct sysfs_directory *cur = NULL;
+
+	if (path == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	rootdev = sysfs_open_device(path);
+	if (rootdev == NULL) {
+		dprintf(stderr, "Error opening root device at %s\n", path);
+		return NULL;
+	}
+	cur = rootdev->directory->subdirs;
+	while (cur != NULL) {
+		new = sysfs_open_device_tree(cur->path);
+		if (new == NULL) {
+			dprintf(stderr, "Error opening device tree at %s\n",
+				cur->path);
+			sysfs_close_device_tree(rootdev);
+			return NULL;
+		}
+		add_device_child_to_parent(rootdev, new);	
+		cur = cur->next;
+	}
+
+	return rootdev;
+}
diff --git a/libsysfs/sysfs_dir.c b/libsysfs/sysfs_dir.c
new file mode 100644
index 0000000000..a83c81f493
--- /dev/null
+++ b/libsysfs/sysfs_dir.c
@@ -0,0 +1,496 @@
+/*
+ * syfs_dir.c
+ *
+ * Directory utility functions for libsysfs
+ *
+ * Copyright (C) 2003 International Business Machines, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include "libsysfs.h"
+#include "sysfs.h"
+
+/**
+ * sysfs_close_attribute: closes and cleans up attribute
+ * @sysattr: attribute to close.
+ */
+void sysfs_close_attribute(struct sysfs_attribute *sysattr)
+{
+	if (sysattr != NULL) {
+		if (sysattr->value != NULL)
+			free(sysattr->value);
+		free(sysattr);
+	}
+}
+
+/**
+ * alloc_attribute: allocates and initializes attribute structure
+ * returns struct sysfs_attribute with success and NULL with error.
+ */
+static struct sysfs_attribute *alloc_attribute(void)
+{
+	return (struct sysfs_attribute *)
+			calloc(1, sizeof(struct sysfs_attribute));
+}
+
+/**
+ * sysfs_open_attribute: creates sysfs_attribute structure
+ * @path: path to attribute.
+ * returns sysfs_attribute struct with success and NULL with error.
+ */
+struct sysfs_attribute *sysfs_open_attribute(const char *path)
+{
+	struct sysfs_attribute *sysattr = NULL;
+	struct stat fileinfo;
+	
+	if (path == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	sysattr = alloc_attribute();
+	if (sysattr == NULL) {
+		dprintf(stderr, "Error allocating attribute at %s\n", path);
+		return NULL;
+	}
+	strncpy(sysattr->path, path, sizeof(sysattr->path));
+	if ((stat(sysattr->path, &fileinfo)) != 0) {
+		perror("stat");
+		sysattr->method = 0;
+	} else {
+		if (fileinfo.st_mode & S_IRUSR)
+			sysattr->method |= SYSFS_METHOD_SHOW;
+		if (fileinfo.st_mode & S_IWUSR)
+			sysattr->method |= SYSFS_METHOD_STORE;
+	}
+
+	return sysattr;
+}
+
+/**
+ * sysfs_read_attribute: reads value from attribute
+ * @sysattr: attribute to read
+ * returns 0 with success and -1 with error.
+ */
+int sysfs_read_attribute(struct sysfs_attribute *sysattr)
+{
+	char *fbuf = NULL;
+	char *vbuf = NULL;
+	size_t length = 0;
+	int pgsize = 0;
+	int fd;
+
+	if (sysattr == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+	if (!(sysattr->method & SYSFS_METHOD_SHOW)) {
+		dprintf (stderr, "Show method not supported for attribute %s\n",
+			sysattr->path);
+		return -1;
+	}
+	pgsize = getpagesize();
+	fbuf = (char *)calloc(1, pgsize+1);
+	if (fbuf == NULL) {
+		perror("calloc");
+		return -1;
+	}
+	if ((fd = open(sysattr->path, O_RDONLY)) < 0) {
+		dprintf (stderr, "Error reading attribute %s\n", sysattr->path);
+		free(fbuf);
+		return -1;
+	}
+	length = read(fd, fbuf, pgsize);
+	if (length < 0) {
+		dprintf (stderr, "Error reading from attribute %s\n",
+			sysattr->path);
+		close(fd);
+		free(fbuf);
+		return -1;
+	}
+	sysattr->len = length;
+	close(fd);
+	vbuf = (char *)realloc(fbuf, length+1);
+	if (vbuf == NULL) {
+		perror("realloc");
+		free(fbuf);
+		return -1;
+	}
+	sysattr->value = vbuf;
+
+	return 0;
+}
+
+/**
+ * sysfs_read_attribute_value: given path to attribute, return its value.
+ *	values can be up to a pagesize, if buffer is smaller the value will 
+ *	be truncated. 
+ * @attrpath: sysfs path to attribute
+ * @value: buffer to put value
+ * @vsize: size of value buffer
+ * returns 0 with success and -1 with error.
+ */
+int sysfs_read_attribute_value(const char *attrpath, char *value, size_t vsize)
+{
+	struct sysfs_attribute *attr = NULL;
+	size_t length = 0;
+
+	if (attrpath == NULL || value == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	attr = sysfs_open_attribute(attrpath);
+	if (attr == NULL) {
+		dprintf(stderr, "Invalid attribute path %s\n", attrpath);
+		errno = EINVAL;
+		return -1;
+	}
+	if((sysfs_read_attribute(attr)) != 0 || attr->value == NULL) {
+		dprintf(stderr, "Error reading from attribute %s\n", attrpath);
+		sysfs_close_attribute(attr);
+		return -1;
+	}
+	length = strlen(attr->value);
+	if (length > vsize) 
+		dprintf(stderr, 
+			"Value length %d is larger than supplied buffer %d\n",
+			length, vsize);
+	strncpy(value, attr->value, vsize);
+	sysfs_close_attribute(attr);
+
+	return 0;
+}
+
+/**
+ * sysfs_get_value_from_attrbutes: given a linked list of attributes and an 
+ * 	attribute name, return its value
+ * @attr: attribute to search
+ * @name: name to look for
+ * returns char * value - could be NULL
+ */
+char *sysfs_get_value_from_attributes(struct sysfs_attribute *attr, 
+					const char *name)
+{	
+	struct sysfs_attribute *cur = NULL;
+	char tmpname[SYSFS_NAME_LEN];
+	
+	if (attr == NULL || name == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}	
+	cur = attr;
+	while (cur != NULL) {
+		memset(tmpname, 0, SYSFS_NAME_LEN);	
+		if ((sysfs_get_name_from_path(cur->path, tmpname,
+		    SYSFS_NAME_LEN)) != 0) {
+			cur = cur->next;
+			continue;
+		}
+		if (strcmp(tmpname, name) == 0)
+			return cur->value;
+		cur = cur->next;
+	}
+	return NULL;
+}
+
+/**
+ * add_subdir_to_dir: adds subdirectory to directory's subdirs
+ * @sysdir: directory to add subdir to
+ * @subdir: subdirectory to add.
+ */
+static void add_subdir_to_dir(struct sysfs_directory *sysdir, 
+		     struct sysfs_directory *subdir)
+{
+	if (sysdir != NULL && subdir != NULL) {
+		subdir->next = sysdir->subdirs;
+		sysdir->subdirs = subdir;
+	}
+}
+
+/**
+ * add_attr_to_dir: adds attribute to directory's attributes
+ * @sysdir: directory to add attribute to
+ * @sysattr: attribute to add.
+ */
+static void add_attr_to_dir(struct sysfs_directory *sysdir, 
+		     			struct sysfs_attribute *sysattr)
+{
+	if (sysdir != NULL && sysattr != NULL) {
+		sysattr->next = sysdir->attributes;
+		sysdir->attributes = sysattr;
+	}
+}
+
+/**
+ * sysfs_close_dlink: closes and cleans up directory link.
+ * @dlink: directory link to close.
+ */
+void sysfs_close_dlink(struct sysfs_dlink *dlink)
+{
+	if (dlink != NULL) {
+		dlink->next = NULL;
+		if (dlink->target != NULL)
+			sysfs_close_directory(dlink->target);
+		free(dlink);
+	}
+}
+
+/**
+ * add_dlink_to_dir: adds directory link to directory's links list.
+ * @sysdir: directory to add it to.
+ * @dlink: link to add.
+ */
+static void add_dlink_to_dir(struct sysfs_directory *sysdir, 
+					struct sysfs_dlink *dlink)
+{
+	if (sysdir != NULL && dlink != NULL) {
+		dlink->next = sysdir->links;
+		sysdir->links = dlink;
+	}
+}
+
+/**
+ * sysfs_close_directory: closes directory, cleans up attributes and links
+ * @sysdir: sysfs_directory to close
+ */
+void sysfs_close_directory(struct sysfs_directory *sysdir)
+{
+	struct sysfs_directory *sdir = NULL, *dnext = NULL;
+	struct sysfs_dlink *dlink = NULL, *nextl = NULL;
+	struct sysfs_attribute *attr = NULL, *anext = NULL;
+
+	if (sysdir != NULL) {
+		if (sysdir->subdirs != NULL) {
+			for (sdir = sysdir->subdirs; sdir != NULL;
+			     sdir = dnext) {
+				dnext = sdir->next;
+				sysfs_close_directory(sdir);
+			}
+		}
+		if (sysdir->links != NULL) {
+			for (dlink = sysdir->links; dlink != NULL;
+			    dlink = nextl) {
+				nextl = dlink->next;
+				sysfs_close_dlink(dlink);
+			}
+		}
+		if (sysdir->attributes != NULL) {
+			for (attr = sysdir->attributes; attr != NULL;
+			     attr = anext) {
+				anext = attr->next;
+				/* sysfs_close_attribute(attr); */
+				if (attr->value != NULL)
+					free(attr->value);
+				free(attr);
+			}
+		}
+		free(sysdir);
+	}
+}
+
+/**
+ * alloc_directory: allocates and initializes directory structure
+ * returns struct sysfs_directory with success or NULL with error.
+ */
+static struct sysfs_directory *alloc_directory(void)
+{
+	return (struct sysfs_directory *)
+			calloc(1, sizeof(struct sysfs_directory));
+}
+
+/**
+ * alloc_dlink: allocates and initializes directory link structure
+ * returns struct sysfs_dlink with success or NULL with error.
+ */
+static struct sysfs_dlink *alloc_dlink(void)
+{
+	return (struct sysfs_dlink *)calloc(1, sizeof(struct sysfs_dlink));
+}
+
+/**
+ * sysfs_open_directory: opens a sysfs directory, creates dir struct, and
+ *		returns.
+ * @path: path of directory to open.
+ * returns: struct sysfs_directory * with success and NULL on error.
+ */
+struct sysfs_directory *sysfs_open_directory(const char *path)
+{
+	struct sysfs_directory *sdir = NULL;
+
+	if (path == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	sdir = alloc_directory();
+	if (sdir == NULL) {
+		dprintf(stderr, "Error allocating directory %s\n", path);
+		return NULL;
+	}
+	strncpy(sdir->path, path, sizeof(sdir->path));
+
+	return sdir;
+}
+
+/**
+ * sysfs_open_dlink: opens a sysfs directory link, creates struct, and returns
+ * @path: path of link to open.
+ * returns: struct sysfs_dlink * with success and NULL on error.
+ */
+struct sysfs_dlink *sysfs_open_dlink(const char *linkpath)
+{
+	struct sysfs_dlink *dlink = NULL;
+	struct sysfs_directory *tdir = NULL;
+	char name[SYSFS_NAME_LEN];
+	char target[SYSFS_PATH_MAX];
+
+	if (linkpath == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	memset(name, 0, SYSFS_NAME_LEN);
+	memset(target, 0, SYSFS_PATH_MAX);
+	if ((sysfs_get_name_from_path(linkpath, name, SYSFS_NAME_LEN)) != 0
+	    || (sysfs_get_link(linkpath, target, SYSFS_PATH_MAX)) != 0) {
+		errno = EINVAL;
+		dprintf(stderr, "Invalid link path %s\n", linkpath);
+		return NULL;
+	}
+	dlink = alloc_dlink();
+	if (dlink == NULL) {
+		dprintf(stderr, 
+			"Error allocating directory link %s\n", linkpath);
+		return NULL;
+	}
+	strcpy(dlink->name, name);
+	tdir = sysfs_open_directory(target);
+	if (tdir == NULL) {
+		dprintf(stderr, "Invalid directory link target %s\n", target);
+		sysfs_close_dlink(dlink);
+		return NULL;
+	}	
+	dlink->target = tdir;
+
+	return dlink;
+}
+
+/**
+ * sysfs_read_directory: grabs attributes, links, and subdirectories
+ * @sysdir: sysfs directory to open
+ * returns 0 with success and -1 with error.
+ */
+int sysfs_read_directory(struct sysfs_directory *sysdir)
+{
+	DIR *dir = NULL;
+	struct dirent *dirent = NULL;
+	struct stat astats;
+	struct sysfs_attribute *attr = NULL;
+	struct sysfs_directory *subdir = NULL;
+	struct sysfs_dlink *dlink = NULL;
+	char file_path[SYSFS_PATH_MAX];
+	int retval = 0;
+
+	if (sysdir == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+	dir = opendir(sysdir->path);
+	if (dir == NULL) {
+		perror("opendir");
+		return -1;
+	}
+	while(((dirent = readdir(dir)) != NULL) && retval == 0) {
+		if (0 == strcmp(dirent->d_name, "."))
+			 continue;
+		if (0 == strcmp(dirent->d_name, ".."))
+			continue;
+		memset(file_path, 0, SYSFS_PATH_MAX);
+		strncpy(file_path, sysdir->path, sizeof(file_path));
+		strncat(file_path, "/", sizeof(file_path));
+		strncat(file_path, dirent->d_name, sizeof(file_path));
+		if ((lstat(file_path, &astats)) != 0) {
+			perror("stat");
+			continue;
+		}
+		if (S_ISREG(astats.st_mode)) {	
+			attr = sysfs_open_attribute(file_path);
+			if (attr == NULL) {
+				dprintf (stderr, "Error opening attribute %s\n",
+					file_path);
+				retval = -1;
+				break;
+			}
+			if (attr->method & SYSFS_METHOD_SHOW) {
+				if ((sysfs_read_attribute(attr)) != 0) {
+					dprintf (stderr, 
+						"Error reading attribute %s\n",
+						file_path);
+					sysfs_close_attribute(attr);
+					continue;
+				}
+			}
+			add_attr_to_dir(sysdir, attr);
+		} else if (S_ISDIR(astats.st_mode)) {
+			subdir = sysfs_open_directory(file_path);
+			if (subdir == NULL) {
+				dprintf (stderr, "Error opening directory %s\n",
+					file_path);
+				retval = -1;
+				break;
+			}
+			add_subdir_to_dir(sysdir, subdir);
+		} else if (S_ISLNK(astats.st_mode)) {
+			dlink = sysfs_open_dlink(file_path);
+			if (dlink == NULL) {
+				dprintf(stderr, "Error opening link %s\n",
+					file_path);
+				retval = -1;
+				break;
+			}
+			add_dlink_to_dir(sysdir, dlink);
+		}
+	}
+	closedir(dir);
+	return(retval);
+}
+
+/**
+ * sysfs_read_dlinks: reads a directory link's target directory. Can
+ * 	supply a linked list of links.
+ * @dlink: directory link to read.
+ * returns 0 with success or -1 with error.
+ */
+int sysfs_read_dlinks(struct sysfs_dlink *dlink)
+{
+	struct sysfs_dlink *cur = NULL;
+
+	if (dlink == NULL || dlink->target == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+	cur = dlink;
+	while (cur != NULL) {
+		if ((sysfs_read_directory(cur->target)) != 0) {
+			dprintf(stderr, 
+				"Error reading directory link target %s\n",
+				dlink->name);
+			return -1;
+		}
+		cur = cur->next;
+	}
+	
+	return 0;
+}
diff --git a/libsysfs/sysfs_driver.c b/libsysfs/sysfs_driver.c
new file mode 100644
index 0000000000..6813c85f14
--- /dev/null
+++ b/libsysfs/sysfs_driver.c
@@ -0,0 +1,89 @@
+/*
+ * sysfs_driver.c
+ *
+ * Driver utility functions for libsysfs
+ *
+ * Copyright (C) 2003 International Business Machines, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include "libsysfs.h"
+#include "sysfs.h"
+
+/**
+ * sysfs_close_driver: closes and cleans up driver structure
+ * @driver: driver to close
+ */
+void sysfs_close_driver(struct sysfs_driver *driver)
+{
+	if (driver != NULL) {
+		if (driver->directory != NULL)
+			sysfs_close_directory(driver->directory);
+		free(driver);
+	}
+}
+
+/**
+ * alloc_driver: allocates and initializes driver
+ * returns struct sysfs_driver with success and NULL with error.
+ */
+static struct sysfs_driver *alloc_driver(void)
+{
+	return (struct sysfs_driver *)calloc(1, sizeof(struct sysfs_driver));
+}
+
+/**
+ * sysfs_open_driver: opens and initializes driver structure
+ * @path: path to driver directory
+ * returns struct sysfs_driver with success and NULL with error
+ */
+struct sysfs_driver *sysfs_open_driver(const char *path)
+{
+	struct sysfs_driver *driver = NULL;
+	struct sysfs_directory *sdir = NULL;
+	char devname[SYSFS_NAME_LEN];
+
+	if (path == NULL) {
+		errno = EINVAL;
+		return NULL;
+	}
+	sdir = sysfs_open_directory(path);
+	if (sdir == NULL) {
+		dprintf (stderr, "Error opening directory %s\n", path);
+		return NULL;
+	}
+	if ((sysfs_read_directory(sdir)) != 0) {
+		dprintf (stderr, "Error reading directory %s\n", path);
+		sysfs_close_directory(sdir);
+		return NULL;
+	}
+	driver = alloc_driver();
+	if (driver == NULL) {
+		dprintf(stderr, "Error allocating driver at %s\n", path);
+		sysfs_close_directory(sdir);
+		return NULL;
+	}
+	if ((sysfs_get_name_from_path(path, devname, SYSFS_NAME_LEN)) != 0) {
+		dprintf (stderr, "Error reading directory %s\n", path);
+		sysfs_close_directory(sdir);
+		free(driver);
+		return NULL;
+	}
+	strncpy(driver->name, devname, sizeof(driver->name));
+	driver->directory = sdir;	
+	
+	return driver;
+}
diff --git a/libsysfs/sysfs_utils.c b/libsysfs/sysfs_utils.c
new file mode 100644
index 0000000000..a2410abe69
--- /dev/null
+++ b/libsysfs/sysfs_utils.c
@@ -0,0 +1,156 @@
+/*
+ * syfs_utils.c
+ *
+ * System utility functions for libsysfs
+ *
+ * Copyright (C) 2003 International Business Machines, Inc.
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License as published by the Free Software Foundation; either
+ *  version 2.1 of the License, or (at your option) any later version.
+ *
+ *  This 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include "libsysfs.h"
+#include "sysfs.h"
+
+/**
+ * sysfs_get_mnt_path: Gets the mount point for specified filesystem.
+ * @fs_type: filesystem type to retrieve mount point
+ * @mnt_path: place to put the retrieved mount path
+ * @len: size of mnt_path
+ * returns 0 with success and -1 with error.
+ */
+static int sysfs_get_fs_mnt_path(const char *fs_type, char *mnt_path, 
+				 size_t len)
+{
+	FILE *mnt;
+	struct mntent *mntent;
+	int ret = 0;
+	size_t dirlen = 0;
+
+	/* check arg */
+	if (fs_type == NULL || mnt_path == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if ((mnt = setmntent(SYSFS_PROC_MNTS, "r")) == NULL) {
+		dprintf(stderr, "Error getting mount information\n");
+		return -1;
+	}
+	while (ret == 0 && dirlen == 0 && (mntent = getmntent(mnt)) != NULL) {
+		if (strcmp(mntent->mnt_type, fs_type) == 0) {
+			dirlen = strlen(mntent->mnt_dir);
+			if (dirlen <= (len - 1)) {
+				strcpy(mnt_path, mntent->mnt_dir);
+			} else {
+				dprintf(stderr, 
+					"Error - mount path too long\n");
+				ret = -1;
+			}
+		}
+	}
+	endmntent(mnt);
+	if (dirlen == 0 && ret == 0) {
+		dprintf(stderr, "Filesystem %s not found!\n", fs_type);
+		errno = EINVAL;
+		ret = -1;
+	}
+	return ret;
+}
+
+/*
+ * sysfs_get_mnt_path: Gets the sysfs mount point.
+ * @mnt_path: place to put "sysfs" mount point
+ * @len: size of mnt_path
+ * returns 0 with success and -1 with error.
+ */
+int sysfs_get_mnt_path(char *mnt_path, size_t len)
+{
+	int ret = -1;
+
+	if (mnt_path != NULL)
+		ret = sysfs_get_fs_mnt_path(SYSFS_FSTYPE_NAME, mnt_path, len);
+	else
+		errno = EINVAL;
+
+	return ret;
+}
+
+/**
+ * sysfs_get_name_from_path: returns last name from a "/" delimited path
+ * @path: path to get name from
+ * @name: where to put name
+ * @len: size of name
+ */
+int sysfs_get_name_from_path(const char *path, char *name, size_t len)
+{
+	char *n = NULL;
+                                                                                
+	if (path == NULL || name == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+	n = strrchr(path, '/');
+	if (n == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+	n++;
+	strncpy(name, n, len);
+
+	return 0;
+}
+
+/**
+ * sysfs_get_link: returns link source
+ * @path: symbolic link's path
+ * @target: where to put name
+ * @len: size of name
+ */
+int sysfs_get_link(const char *path, char *target, size_t len)
+{
+	char devdir[SYSFS_PATH_MAX];
+	char linkpath[SYSFS_PATH_MAX];
+	char *d = NULL;
+
+	if (path == NULL || target == NULL) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	memset(devdir, 0, SYSFS_PATH_MAX);
+	memset(linkpath, 0, SYSFS_PATH_MAX);
+
+	if ((sysfs_get_mnt_path(devdir, SYSFS_PATH_MAX)) != 0) {
+		dprintf(stderr, "Sysfs not supported on this system\n");
+		return -1;
+	}
+								        
+	if ((readlink(path, linkpath, SYSFS_PATH_MAX)) < 0) {
+		return -1;
+	}
+									        
+	d = linkpath;
+
+	/* getting rid of leading "../.." */	
+	while (*d == '/' || *d == '.')
+		d++;
+
+	d--;
+	
+	strcat(devdir, d);
+	strncpy(target, devdir, len);
+
+	return 0;
+}