Imported Upstream version 0.5.5upstream/0.5.5upstream

7 files changed, 945 insertions, 0 deletions

diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..eb685a5
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,481 @@
+		  GNU LIBRARY GENERAL PUBLIC LICENSE
+		       Version 2, June 1991
+
+ Copyright (C) 1991 Free Software Foundation, Inc.
+                    675 Mass Ave, Cambridge, MA 02139, 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 library GPL.  It is
+ numbered 2 because it goes with version 2 of the ordinary GPL.]
+
+			    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 Library General Public License, applies to some
+specially designated Free Software Foundation software, and to any
+other libraries whose authors decide to use it.  You can use it for
+your libraries, too.
+
+  When we speak of free software, we are referring to freedom, 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 or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the 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 a program 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.
+
+  Our method of protecting your rights has two steps: (1) copyright
+the library, and (2) offer you this license which gives you legal
+permission to copy, distribute and/or modify the library.
+
+  Also, for each distributor's protection, we want to make certain
+that everyone understands that there is no warranty for this free
+library.  If the library is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original
+version, so that any problems introduced by others will not reflect on
+the original authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that companies distributing free
+software will individually obtain patent licenses, thus in effect
+transforming the program into proprietary software.  To prevent this,
+we have made it clear that any patent must be licensed for everyone's
+free use or not licensed at all.
+
+  Most GNU software, including some libraries, is covered by the ordinary
+GNU General Public License, which was designed for utility programs.  This
+license, the GNU Library General Public License, applies to certain
+designated libraries.  This license is quite different from the ordinary
+one; be sure to read it in full, and don't assume that anything in it is
+the same as in the ordinary license.
+
+  The reason we have a separate public license for some libraries is that
+they blur the distinction we usually make between modifying or adding to a
+program and simply using it.  Linking a program with a library, without
+changing the library, is in some sense simply using the library, and is
+analogous to running a utility program or application program.  However, in
+a textual and legal sense, the linked executable is a combined work, a
+derivative of the original library, and the ordinary General Public License
+treats it as such.
+
+  Because of this blurred distinction, using the ordinary General
+Public License for libraries did not effectively promote software
+sharing, because most developers did not use the libraries.  We
+concluded that weaker conditions might promote sharing better.
+
+  However, unrestricted linking of non-free programs would deprive the
+users of those programs of all benefit from the free status of the
+libraries themselves.  This Library General Public License is intended to
+permit developers of non-free programs to use free libraries, while
+preserving your freedom as a user of such programs to change the free
+libraries that are incorporated in them.  (We have not seen how to achieve
+this as regards changes in header files, but we have achieved it as regards
+changes in the actual functions of the Library.)  The hope is that this
+will lead to faster development of free libraries.
+
+  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, while the latter only
+works together with the library.
+
+  Note that it is possible for a library to be covered by the ordinary
+General Public License rather than by this special one.
+
+		  GNU LIBRARY GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License Agreement applies to any software library which
+contains a notice placed by the copyright holder or other authorized
+party saying it may be distributed under the terms of this Library
+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 compile 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) 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.
+
+    c) 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.
+
+    d) 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 source code 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 to
+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 Library 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
+
+     Appendix: How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  It is
+safest to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..3137a5a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,62 @@
+NAME=utempter
+VERSION=$(shell awk '/^Version:/ { print $$2 }' $(NAME).spec)
+RELEASE=$(shell awk '/^Release:/ { print $$2 }' $(NAME).spec)
+CVSTAG=r$(subst .,-,$(VERSION))
+CVSROOT=$(shell cat CVS/Root)
+# major number of the .so lib
+SOMAJOR = 0
+
+SHAREDLIB = lib$(NAME).so
+SONAME = $(SHAREDLIB).$(SOMAJOR)
+
+CFLAGS = -Wall $(RPM_OPT_FLAGS)
+
+TARGETS = $(NAME) utmp $(SHAREDLIB)
+
+all:	$(TARGETS)
+
+clean:
+	rm -f *.so utempter utmp *.os
+
+%.os : %.c
+	$(CC) -c $(CFLAGS) -fPIC $< -o $@
+
+install:
+	mkdir -p $(RPM_BUILD_ROOT)/usr/sbin
+	mkdir -p $(RPM_BUILD_ROOT)/$(LIBDIR)
+	mkdir -p $(RPM_BUILD_ROOT)/usr/include
+	install -m 4755 utempter $(RPM_BUILD_ROOT)/usr/sbin
+	install -m 644 utempter.h $(RPM_BUILD_ROOT)/usr/include
+	install -m 644 $(SHAREDLIB) $(RPM_BUILD_ROOT)/$(LIBDIR)/$(SHAREDLIB).$(VERSION)
+	ln -sf $(SHAREDLIB).$(VERSION) $(RPM_BUILD_ROOT)/$(LIBDIR)/$(SHAREDLIB)
+
+$(SHAREDLIB): utmpintf.os
+	$(CC) -o $@ -shared -Wl,-soname,$(SONAME) $^ -lc
+
+utmpintf.o: utmpintf.c utempter.h
+
+tag:
+	cvs tag $(CVSTAG) .
+
+force-tag:
+	cvs tag -F $(CVSTAG) .
+
+archive:
+	@rm -rf /tmp/$(NAME)-$(VERSION) /tmp/$(NAME)
+	@echo $(VERSION)
+	@echo $(CVSROOT)
+	@echo $(CVSTAG)
+	@echo $(NAME)
+	@cd /tmp; cvs -d$(CVSROOT) export -r$(CVSTAG) $(NAME)
+	@mv /tmp/$(NAME) /tmp/$(NAME)-$(VERSION)
+	@dir=$$PWD; cd /tmp; tar cvzf $$dir/$(NAME)-$(VERSION).tar.gz $(NAME)-$(VERSION)
+	@rm -rf /tmp/$(NAME)-$(VERSION)
+	@echo "The archive is in $(NAME)-$(VERSION).tar.gz"
+
+srpm-x:
+	@echo Creating $(NAME) src.rpm
+	@mkdir -p $(HOME)/rpmbuild/$(NAME)-$(VERSION)
+	@mv $(NAME)-$(VERSION).tar.* $(HOME)/rpmbuild/$(NAME)-$(VERSION)/
+	@cp $(NAME).spec $(HOME)/rpmbuild/$(NAME)-$(VERSION)/
+	@pushd $(HOME)/rpmbuild/$(NAME)-$(VERSION) &> /dev/null ; rpmbuild --nodeps -bs $(NAME).spec ; popd &> /dev/null
+	@echo SRPM is: $(HOME)/rpmbuild/SRPMS/$(NAME)-$(VERSION)-$(RELEASE).src.rpm
diff --git a/utempter.c b/utempter.c
new file mode 100644
index 0000000..dd65520
--- /dev/null
+++ b/utempter.c
@@ -0,0 +1,161 @@
+#define _GNU_SOURCE 1
+
+#include <errno.h>
+#include <fcntl.h>
+#include <pty.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <sys/sysmacros.h>
+#include <utmp.h>
+#include <utmpx.h>
+#include <unistd.h>
+
+static void usage(void) {
+    fprintf(stderr, "Usage:     -a <slave-device-name> <host>\n"
+	            "           -d <slave-device-name>\n");
+    exit(1); 
+}
+
+static void checkDevice(const char * device) {
+    struct stat sb1, sb2;
+    int flags;
+    
+    if (strstr(device, "/../") || strstr(device, "/./") || 
+	strstr(device, "//")) {
+	fprintf(stderr, "a simple path is required\n");
+	exit(1);
+    }
+
+    if (strncmp(device, "/dev/", 5)) {
+	fprintf(stderr, "the device must begin with /dev/\n");
+	exit(1);
+    }
+
+    if (fstat(3, &sb1)) {
+	fprintf(stderr, "error stat'ing fd 3: %s\n", strerror(errno));
+	exit(1);
+    }
+
+    if (major(sb1.st_rdev) == 2) {
+	if (lstat(device, &sb2)) {
+	    fprintf(stderr, "error stat'ing %s: %s\n", device, strerror(errno));
+	    exit(1);
+	}
+
+	if (major(sb2.st_rdev) != 3) {
+	    fprintf(stderr, "%s is not the slave for the master pty on fd 3\n",
+		    device);
+	    exit(1);
+	}
+
+	if (minor(sb1.st_rdev) != minor(sb2.st_rdev)) {
+	    fprintf(stderr, "fd 3 and %s are not the same device\n",
+		    device);
+	    exit(1);
+	}
+    } else if (major(sb1.st_rdev) == 5 && minor(sb1.st_rdev) == 2) {
+	char * dev2 = ptsname(3);
+
+	if (!dev2 || strcmp(dev2, device)) { 
+	    fprintf(stderr, "passed master doesn't match slave name\n");
+	    exit(1);
+	}
+    } else {
+	fprintf(stderr, "fd 3 is not a master pty device (it is %d, %d)\n",
+		major(sb1.st_rdev), minor(sb1.st_rdev));
+	exit(1);
+    }
+
+    if ((flags = fcntl(3, F_GETFL, 0)) < 0) {
+	fprintf(stderr, "error getting flags for fd 3: %s\n", strerror(errno));
+	exit(1);
+    }
+
+    if ((flags & O_RDWR) != O_RDWR) {
+	fprintf(stderr, "fd 3 is not read/writeable\n");
+	exit(1);
+    }
+}
+
+int main(int argc, const char ** argv) {
+    struct utmpx utx;
+    int add;
+    const char * device, * host;
+    struct passwd * pw;
+    int i;
+    struct stat sb;
+    char * id;
+ 
+    if (argc < 3) usage();
+
+    for (i = 0; i < 3; i++) {
+	if (fstat(i, &sb)) {
+	    fprintf(stderr, "error: failed to stat %d\n", i);
+	    exit(1);
+	}
+    }
+
+    if (!strcmp(argv[1], "-a")) {
+	if (argc > 4) usage();
+	add = 1;
+    } else if (!strcmp(argv[1], "-d")) {
+	if (argc != 3) usage();
+	add = 0;
+    } else
+	usage();
+
+    device = argv[2];
+
+    if (!getuid()) {
+	host = argv[3];		/* either NULL or something real */
+    } else { 
+	host = NULL;
+    }
+
+    memset(&utx, 0, sizeof(utx));
+    if (add)
+	utx.ut_type = USER_PROCESS;
+    else
+	utx.ut_type = DEAD_PROCESS;
+
+    utx.ut_pid = getppid();
+    if (utx.ut_pid == 1) {
+	fprintf(stderr, "error: parent pid should not be init\n");
+	exit(1);
+    }
+
+    checkDevice(device);
+
+    strncpy(utx.ut_line, device + 5, sizeof(utx.ut_line));
+
+    pw = getpwuid(getuid());
+    if (!pw) {
+	fprintf(stderr, "cannot find user w/ uid %d\n", getuid());
+	exit(1);
+    }
+
+    strncpy(utx.ut_user, pw->pw_name, sizeof(utx.ut_user));
+
+    if (host) 
+	strncpy(utx.ut_host, host, sizeof(utx.ut_host));
+
+    if (!strncmp("pts/", utx.ut_line, 4)) {
+	id = utx.ut_line + 3;
+	if (strlen(id) > 4) id++;
+    } else {
+	id = utx.ut_line + 2;
+    }
+
+    strncpy(utx.ut_id, id, sizeof(utx.ut_id));
+
+    gettimeofday(&utx.ut_tv, NULL);
+
+    pututxline(&utx);
+    updwtmpx(_PATH_WTMP, &utx);
+
+    return 0;
+}
diff --git a/utempter.h b/utempter.h
new file mode 100644
index 0000000..347bcd7
--- /dev/null
+++ b/utempter.h
@@ -0,0 +1,3 @@
+void addToUtmp(const char *pty, const char *hostname, int cmdfd);
+void removeFromUtmp(void);	/* removes the last pty added to utmp */
+void removeLineFromUtmp(const char * pty, int fd);
diff --git a/utempter.spec b/utempter.spec
new file mode 100644
index 0000000..cb6536a
--- /dev/null
+++ b/utempter.spec
@@ -0,0 +1,129 @@
+Summary:   A privileged helper for utmp/wtmp updates.
+Name:      utempter
+Version:   0.5.5
+Release:   1
+License:   MIT/LGPL
+Group:     System Environment/Base
+Source:    utempter-%{version}.tar.gz
+Prereq:    /usr/sbin/groupadd, /sbin/ldconfig, fileutils
+BuildRoot: %{_tmppath}/%{name}-%{version}-root
+
+%description
+Utempter is a utility which allows some non-privileged programs to
+have required root access without compromising system
+security. Utempter accomplishes this feat by acting as a buffer
+between root and the programs.
+
+%prep
+%setup  -q
+
+%build
+make RPM_OPT_FLAGS="$RPM_OPT_FLAGS"
+
+%install
+rm -rf $RPM_BUILD_ROOT
+make PREFIX=$RPM_BUILD_ROOT LIBDIR=%{_libdir} install
+/sbin/ldconfig -n $RPM_BUILD_ROOT/%{_libdir}
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%pre 
+%{_sbindir}/groupadd -g 22 -r -f utmp || :
+
+%post
+{
+    /sbin/ldconfig
+    for file in /var/log/wtmp /var/run/utmp ; do
+        if [ -f $file ]; then
+            chown root:utmp $file
+            chmod 664 $file
+        fi
+    done
+}
+
+%postun -p /sbin/ldconfig
+
+%files
+%defattr(-,root,root)
+%attr(02755, root, utmp) %{_sbindir}/utempter
+%doc COPYING
+%{_libdir}/libutempter.so*
+%{_includedir}/utempter.h
+
+%changelog
+* Mon Apr 19 2004 Mike A. Harris <mharris@redhat.com> 0.5.5-1
+- [SECURITY] Fix CAN-2004-0233 utempter directory traversal symlink attack
+  issue for immediate erratum release.
+- Build all-arch test package 0.5.5-1 in dist-fc2-scratch
+
+* Mon Feb 23 2004 Mike A. Harris <mharris@redhat.com> 0.5.4-1
+- Rewrote post install script to be a bit cleaner and rebuilt in rawhide to
+  pick up twaugh's chown change
+- Added 'srpm-x' target to Makefile for package maintainer SRPM building
+
+* Mon Feb 23 2004 Tim Waugh <twaugh@redhat.com>
+- Use ':' instead of '.' as separator for chown.
+
+* Fri May 30 2003 Mike A. Harris <mharris@redhat.com> 0.5.3-1
+- Bump version and release and rebuild to strip debug info into .debuginfo
+  package, as the Red Hat Linux 9 package shipped unstripped (#91664)
+- Updated license field to reflect dual license MIT style + LGPL
+- Changed spec file Copyright tag to proper License tag
+- Removed stupid crackrock "version" macro define
+
+* Tue Feb 18 2003 Matt Wilson <msw@redhat.com> 0.5.2-16
+- get the second SIGCHLD SIG_IGN case too (#84571)
+
+* Tue Feb 11 2003 Bill Nottingham <notting@redhat.com> 0.5.2-15
+- don't set SIGCHLD handler to SIG_IGN and then wait
+
+* Tue Feb 04 2003 Florian La Roche <Florian.LaRoche@redhat.de>
+- add symlink to shared lib
+- internal sync
+
+* Tue Oct  8 2002 Mike A. Harris <mharris@redhat.com> 0.5.2-12
+- All-arch rebuild
+- Removed dumb usage of {version} in Version: tag
+
+* Thu Sep  5 2002 Mike A. Harris <mharris@redhat.com> 0.5.2-11hammer
+- Updated BuildRoot line to meet Red Hat standards
+- Updated filelist to use rpm macros for _libdir, etc.
+- Added comment to top of specfile to remind people to check utempter changes
+  into CVS, since utempter IS managed by CVS afterall...  I will fix the
+  missing bits in CVS soon once the package is reassigned to me
+- Added 'LIBDIR=%{_libdir}' to make commandline for proper x86_64 build
+- Added libdir patch to Makefile
+
+* Fri Jun 21 2002 Tim Powers <timp@redhat.com>
+- automated rebuild
+
+* Thu Jun 20 2002 Elliot Lee <sopwith@redhat.com> 0.5.2-9
+- Don't strip binary
+
+* Thu May 23 2002 Tim Powers <timp@redhat.com>
+- automated rebuild
+
+* Wed Jan 09 2002 Tim Powers <timp@redhat.com>
+- automated rebuild
+
+* Sun Jun 24 2001 Elliot Lee <sopwith@redhat.com>
+- Bump release + rebuild.
+
+* Thu Jul 13 2000 Prospector <bugzilla@redhat.com>
+- automatic rebuild
+
+* Sat Jun 17 2000 Matt Wilson <msw@redhat.com>
+- defattr root
+
+* Thu Feb 24 2000 Erik Troan <ewt@redhat.com>
+- added LGPL notice
+
+* Mon Sep 13 1999 Bill Nottingham <notting@redhat.com>
+- strip utempter
+
+* Mon Aug 30 1999 Bill Nottingham <notting@redhat.com>
+- add utmp as group 22
+
+* Fri Jun  4 1999 Jeff Johnson <jbj@redhat.com>
+- ignore SIGCHLD while processing utmp.
diff --git a/utmp.c b/utmp.c
new file mode 100644
index 0000000..f6bf737
--- /dev/null
+++ b/utmp.c
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <utmp.h>
+
+const char * utTypeName(short int foo) {
+    switch (foo) {
+      case EMPTY:
+	return "EMPTY";
+      case RUN_LVL:
+	return "RUN_LVL";
+      case BOOT_TIME:
+	return "BOOT_TIME";
+      case NEW_TIME:
+	return "NEW_TIME";
+      case OLD_TIME:
+	return "OLD_TIME";
+      case INIT_PROCESS:
+	return "INIT_PROCESS";
+      case LOGIN_PROCESS:
+	return "LOGIN_PROCESS";
+      case USER_PROCESS:
+	return "USER_PROCESS";
+      case DEAD_PROCESS:
+	return "DEAD_PROCESS";
+      case ACCOUNTING:
+	return "ACCOUNTING";
+    }
+
+    return "(unknown)";
+}
+
+int main() {
+    struct utmp * ut;
+
+    setutent();
+    while ((ut = getutent())) {
+	if (ut->ut_type == DEAD_PROCESS) continue;
+
+	printf("%-13s %5d /dev/%-5s %-8s %-15s\n", 
+		utTypeName(ut->ut_type), ut->ut_pid, ut->ut_line,
+		*ut->ut_user ? ut->ut_user : "(user)", ut->ut_host);
+    }
+
+    return 0;
+}
diff --git a/utmpintf.c b/utmpintf.c
new file mode 100644
index 0000000..dd192ac
--- /dev/null
+++ b/utmpintf.c
@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <sys/wait.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "utempter.h"
+
+static char * ptyName = NULL;
+static int masterFd;
+
+void addToUtmp(const char *pty, const char *hostname, int cmdfd)
+{
+    char * argv[] = { "/usr/sbin/utempter", "-a", pty, hostname, NULL};
+    pid_t child;
+    int status;
+    void (*osig) (int) = signal(SIGCHLD, SIG_DFL);
+
+    if (!(child = fork())) {
+	signal(SIGCHLD, SIG_DFL);
+	/* these have to be open to something */
+	dup2(cmdfd, 0);
+	dup2(cmdfd, 1);
+	dup2(cmdfd, 3);
+	execv(argv[0], argv);
+	exit(1);
+    }
+
+    waitpid(child, &status, 0);
+    signal(SIGCHLD, osig);
+
+    ptyName = strdup(pty);
+    masterFd = cmdfd;
+}
+
+void removeFromUtmp(void) 
+{
+    if (!ptyName) return;
+
+    removeLineFromUtmp(ptyName, masterFd);
+
+    free(ptyName);
+    ptyName = NULL;
+}
+
+void removeLineFromUtmp(const char * pty, int fd) {
+    char * argv[] = { "/usr/sbin/utempter", "-d", pty, NULL};
+    pid_t child;
+    void (*osig) (int) = signal(SIGCHLD, SIG_DFL);
+
+    if (!(child = fork())) {
+	signal(SIGCHLD, SIG_DFL);
+	/* these have to be open to something */
+	dup2(fd, 0);
+	dup2(fd, 1);
+	dup2(fd, 3);
+	execv(argv[0], argv);
+	fprintf(stderr, "EXEC FAILED!\n");
+    }
+
+    waitpid(child, NULL, 0);
+    signal(SIGCHLD, osig);
+}