diff options
-rw-r--r-- | usr.sbin/crunch/COPYRIGHT | 25 | ||||
-rw-r--r-- | usr.sbin/crunch/Makefile | 4 | ||||
-rw-r--r-- | usr.sbin/crunch/Makefile.inc | 2 | ||||
-rw-r--r-- | usr.sbin/crunch/README | 88 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchgen/Makefile | 9 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchgen/crunched_main.c | 102 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchgen/crunched_skel.c | 107 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchgen/crunchgen.1 | 266 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchgen/crunchgen.c | 856 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchgen/mkskel.sh | 15 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchide/Makefile | 4 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchide/crunchide.1 | 68 | ||||
-rw-r--r-- | usr.sbin/crunch/crunchide/crunchide.c | 321 | ||||
-rw-r--r-- | usr.sbin/crunch/examples/Makefile | 32 | ||||
-rw-r--r-- | usr.sbin/crunch/examples/fixit.conf | 41 | ||||
-rw-r--r-- | usr.sbin/crunch/examples/really-big.conf | 146 |
16 files changed, 2086 insertions, 0 deletions
diff --git a/usr.sbin/crunch/COPYRIGHT b/usr.sbin/crunch/COPYRIGHT new file mode 100644 index 0000000..c7b4d2f --- /dev/null +++ b/usr.sbin/crunch/COPYRIGHT @@ -0,0 +1,25 @@ +/* + * Copyright (c) 1994 University of Maryland + * All Rights Reserved. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of U.M. not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. U.M. makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M. + * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Author: James da Silva, Systems Design and Analysis Group + * Computer Science Department + * University of Maryland at College Park + */ diff --git a/usr.sbin/crunch/Makefile b/usr.sbin/crunch/Makefile new file mode 100644 index 0000000..a38e0b9 --- /dev/null +++ b/usr.sbin/crunch/Makefile @@ -0,0 +1,4 @@ + +SUBDIR=crunchgen crunchide + +.include <bsd.subdir.mk> diff --git a/usr.sbin/crunch/Makefile.inc b/usr.sbin/crunch/Makefile.inc new file mode 100644 index 0000000..da42105 --- /dev/null +++ b/usr.sbin/crunch/Makefile.inc @@ -0,0 +1,2 @@ +# modify to taste +BINDIR?= /usr/bin diff --git a/usr.sbin/crunch/README b/usr.sbin/crunch/README new file mode 100644 index 0000000..27c2d02 --- /dev/null +++ b/usr.sbin/crunch/README @@ -0,0 +1,88 @@ + +CRUNCH 0.2 README 6/14/94 + +Crunch is available via anonymous ftp to ftp.cs.umd.edu in + pub/bsd/crunch-0.2.tar.gz + + +WHAT'S NEW IN 0.2 + +* The prototype awk script has been replaced by a more capable and + hopefully more robust C program. +* No fragile template makefiles or dependencies on the details of the + bsd build environment. +* You can build crunched binaries even with no sources on-line, you + just need the .o files. Crunchgen still will try to figure out as + much as possible on its own, but you can override its guessing by + specifying the list of .o files explicitly. +* Crunch itself has been bmake'd and some man pages written, so it + should be ready to install. + + +INTRODUCTION + +Crunch is a little package that helps create "crunched" binaries for use +on boot, install, and fixit floppies. A crunched binary in this case is +one where many programs have been linked together into one a.out file. +The different programs are run depending on the value of argv[0], so +hard links to the crunched binary suffice to simulate a perfectly normal +system. + +As an example, I have created an 980K crunched "fixit" binary containing +the following programs in their entirety: + + cat chmod cp date dd df echo ed expr hostname kill ln ls mkdir + mt mv pwd rcp rm rmdir sh sleep stty sync test [ badsect chown + clri disklabel dump rdump dmesg fdisk fsck halt ifconfig init + mknod mount newfs ping reboot restore rrestore swapon umount + ftp rsh sed telnet rlogin vi cpio gzip gunzip gzcat + +Note carefully: vi, cpio, gzip, ed, sed, dump/restore, some networking +utilities, and the disk management utilities, all in a binary small +enough to fit on a 1.2 MB root filesystem floppy (albeit with the kernel +on its own boot floppy). A more reasonable subset can be made to fit +easily with a kernel for a decent one-disk fixit filesystem. + +The linking together of different programs by hand is an old +space-saving technique. Crunch automates the process by building the +necessary stub files and makefile for you (via the crunchgen program), +and by doctoring the symbol tables of the component .o files to allow +them to link without "symbol multiply defined" conflicts (via the +crunchide program). + + +BUILDING CRUNCH + +Just type make, then make install. + +Crunch was written and tested under NetBSD/i386, but should work under +other PC BSD systems that use GNU ld. + +The crunchgen(1) and crunchide(1) man pages have more details on using +crunch, and the examples subdirectory contains some working .conf files +and a sample Makefile. + +CREDITS + +Thanks to the NetBSD team for a consistently high quality effort in +bringing together a solid, state of the art development environment. + +Thanks to the FreeBSD guys; Rod Grimes, Nate Williams and Jordan +Hubbard; and to Bruce Evans, for immediate and detailed feedback on +crunch 0.1, and for pressing me to make the prototype more useable. + +Crunch was written for the Maruti Hard Real-Time Operating System +project at the University of Maryland, to help make for better install +and recovery procedures for our NetBSD-based development environment. It +is copyright (c) 1994 by the University of Maryland under a UCB-style +freely- redistributable notice. See the file COPYRIGHT for details. + +Please let me know of any problems or of enhancements you make to this +package. I'm particularly interested in the details of what you found +was good to put on your fixit or install disks. Thanks! + +Share and Enjoy, +Jaime +............................................................................ +: Stand on my shoulders, : jds@cs.umd.edu : James da Silva +: not on my toes. : uunet!mimsy!jds : http://www.cs.umd.edu/users/jds diff --git a/usr.sbin/crunch/crunchgen/Makefile b/usr.sbin/crunch/crunchgen/Makefile new file mode 100644 index 0000000..71acb21 --- /dev/null +++ b/usr.sbin/crunch/crunchgen/Makefile @@ -0,0 +1,9 @@ + +PROG=crunchgen +SRCS=crunchgen.c crunched_skel.c +CFLAGS+=-g -Wall + +crunched_skel.c: crunched_main.c + ${.CURDIR}/mkskel.sh ${.CURDIR}/crunched_main.c >crunched_skel.c + +.include <bsd.prog.mk> diff --git a/usr.sbin/crunch/crunchgen/crunched_main.c b/usr.sbin/crunch/crunchgen/crunched_main.c new file mode 100644 index 0000000..a07317a --- /dev/null +++ b/usr.sbin/crunch/crunchgen/crunched_main.c @@ -0,0 +1,102 @@ +/* + * Copyright (c) 1994 University of Maryland + * All Rights Reserved. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of U.M. not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. U.M. makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M. + * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Author: James da Silva, Systems Design and Analysis Group + * Computer Science Department + * University of Maryland at College Park + */ +/* + * crunched_main.c - main program for crunched binaries, it branches to a + * particular subprogram based on the value of argv[0]. Also included + * is a little program invoked when the crunched binary is called via + * its EXECNAME. This one prints out the list of compiled-in binaries, + * or calls one of them based on argv[1]. This allows the testing of + * the crunched binary without creating all the links. + */ +#include <stdio.h> +#include <string.h> + +struct stub { + char *name; + int (*f)(); +}; + +extern struct stub entry_points[]; + +int main(int argc, char **argv) +{ + char *slash, *basename; + struct stub *ep; + + if(argv[0] == NULL || *argv[0] == '\0') + crunched_usage(); + + slash = strrchr(argv[0], '/'); + basename = slash? slash+1 : argv[0]; + + for(ep=entry_points; ep->name != NULL; ep++) + if(!strcmp(basename, ep->name)) break; + + if(ep->name) + return ep->f(argc, argv); + else { + fprintf(stderr, "%s: %s not compiled in\n", EXECNAME, basename); + crunched_usage(); + } +} + + +int crunched_main(int argc, char **argv) +{ + struct stub *ep; + int columns, len; + + if(argc <= 1) + crunched_usage(); + + return main(--argc, ++argv); +} + + +int crunched_usage() +{ + int columns, len; + struct stub *ep; + + fprintf(stderr, "Usage: %s <prog> <args> ..., where <prog> is one of:\n", + EXECNAME); + columns = 0; + for(ep=entry_points; ep->name != NULL; ep++) { + len = strlen(ep->name) + 1; + if(columns+len < 80) + columns += len; + else { + fprintf(stderr, "\n"); + columns = len; + } + fprintf(stderr, " %s", ep->name); + } + fprintf(stderr, "\n"); + exit(1); +} + +/* end of crunched_main.c */ + diff --git a/usr.sbin/crunch/crunchgen/crunched_skel.c b/usr.sbin/crunch/crunchgen/crunched_skel.c new file mode 100644 index 0000000..d605d6c --- /dev/null +++ b/usr.sbin/crunch/crunchgen/crunched_skel.c @@ -0,0 +1,107 @@ +/* File created via mkskel.sh */ + +char *crunched_skel[] = { + "/*", + " * Copyright (c) 1994 University of Maryland", + " * All Rights Reserved.", + " *", + " * Permission to use, copy, modify, distribute, and sell this software and its", + " * documentation for any purpose is hereby granted without fee, provided that", + " * the above copyright notice appear in all copies and that both that", + " * copyright notice and this permission notice appear in supporting", + " * documentation, and that the name of U.M. not be used in advertising or", + " * publicity pertaining to distribution of the software without specific,", + " * written prior permission. U.M. makes no representations about the", + " * suitability of this software for any purpose. It is provided \"as is\"", + " * without express or implied warranty.", + " *", + " * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL", + " * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M.", + " * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES", + " * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION", + " * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN", + " * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.", + " *", + " * Author: James da Silva, Systems Design and Analysis Group", + " * Computer Science Department", + " * University of Maryland at College Park", + " */", + "/*", + " * crunched_main.c - main program for crunched binaries, it branches to a ", + " * particular subprogram based on the value of argv[0]. Also included", + " * is a little program invoked when the crunched binary is called via", + " * its EXECNAME. This one prints out the list of compiled-in binaries,", + " * or calls one of them based on argv[1]. This allows the testing of", + " * the crunched binary without creating all the links.", + " */", + "#include <stdio.h>", + "#include <string.h>", + "", + "struct stub {", + " char *name;", + " int (*f)();", + "};", + "", + "extern struct stub entry_points[];", + "", + "int main(int argc, char **argv)", + "{", + " char *slash, *basename;", + " struct stub *ep;", + "", + " if(argv[0] == NULL || *argv[0] == '\\0')", + " crunched_usage();", + "", + " slash = strrchr(argv[0], '/');", + " basename = slash? slash+1 : argv[0];", + "", + " for(ep=entry_points; ep->name != NULL; ep++)", + " if(!strcmp(basename, ep->name)) break;", + "", + " if(ep->name)", + " return ep->f(argc, argv);", + " else {", + " fprintf(stderr, \"%s: %s not compiled in\\n\", EXECNAME, basename);", + " crunched_usage();", + " }", + "}", + "", + "", + "int crunched_main(int argc, char **argv)", + "{", + " struct stub *ep;", + " int columns, len;", + "", + " if(argc <= 1) ", + " crunched_usage();", + "", + " return main(--argc, ++argv);", + "}", + "", + "", + "int crunched_usage()", + "{", + " int columns, len;", + " struct stub *ep;", + "", + " fprintf(stderr, \"Usage: %s <prog> <args> ..., where <prog> is one of:\\n\",", + " EXECNAME);", + " columns = 0;", + " for(ep=entry_points; ep->name != NULL; ep++) {", + " len = strlen(ep->name) + 1;", + " if(columns+len < 80)", + " columns += len;", + " else {", + " fprintf(stderr, \"\\n\");", + " columns = len;", + " }", + " fprintf(stderr, \" %s\", ep->name);", + " }", + " fprintf(stderr, \"\\n\");", + " exit(1);", + "}", + "", + "/* end of crunched_main.c */", + "", + 0 +}; diff --git a/usr.sbin/crunch/crunchgen/crunchgen.1 b/usr.sbin/crunch/crunchgen/crunchgen.1 new file mode 100644 index 0000000..8c97d66 --- /dev/null +++ b/usr.sbin/crunch/crunchgen/crunchgen.1 @@ -0,0 +1,266 @@ +.\" +.\" Copyright (c) 1994 University of Maryland +.\" All Rights Reserved. +.\" +.\" Permission to use, copy, modify, distribute, and sell this software and its +.\" documentation for any purpose is hereby granted without fee, provided that +.\" the above copyright notice appear in all copies and that both that +.\" copyright notice and this permission notice appear in supporting +.\" documentation, and that the name of U.M. not be used in advertising or +.\" publicity pertaining to distribution of the software without specific, +.\" written prior permission. U.M. makes no representations about the +.\" suitability of this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.\" U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M. +.\" BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR +.\" IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +.\" +.\" Author: James da Silva, Systems Design and Analysis Group +.\" Computer Science Department +.\" University of Maryland at College Park +.\" +.Dd June 14, 1994 +.Dt CRUNCHGEN 1 +.Os BSD 4 +.Sh NAME +.Nm \&crunchgen +.Nd generates build environment for a crunched binary +.Sh SYNOPSIS +.Nm \&crunchgen +.Op Fl fq +.Op Fl m Ar makefile-name +.Op Fl c Ar c-file-name +.Op Fl e Ar exec-file-name +.Op Ar conf-file +.Sh DESCRIPTION + +A crunched binary is a program made up of many other programs linked +together into a single executable. The crunched binary main() +function determines which component program to run by the contents of +argv[0]. The main reason to crunch programs together is for fitting +as many programs as possible onto an installation or system recovery +floppy. + +.Pp +.Nm Crunchgen +reads in the specifications in +.Ar conf-file +for a crunched binary, and generates a Makefile and accompanying +top-level C source file that when built create the crunched executable +file from the component programs. For each component program, +.Nm crunchgen +can optionally attempt to determine the object (.o) files that make up +the program from its source directory Makefile. This information is +cached between runs. +.Nm Crunchgen +uses the companion program +.Nm crunchide +to eliminate link-time conflicts between the component programs by +hiding all unnecessary symbols. + +.Pp +After +.Nm crunchgen +is run, the crunched binary can be built by running ``make -f +<conf-name>.mk''. The component programs' object files must already +be built. A ``objs'' target, included in the output makefile, will +run make in each component program's source dir to build the object +files for the user. This is not done automatically since in release +engineering circumstances it is generally not desireable to be +modifying objects in other directories. + +.Pp +The options are as follows: +.Bl -tag -width indent +.It Fl c Ar c-file-name +Set output C file name to +.Ar c-file-name . +The default name is ``<conf-name>.c''. +.It Fl e Ar exec-file-name +Set crunched binary executable file name to +.Ar exec-file-name . +The default name is ``<conf-name>''. +.It Fl f +Flush cache. Forces the recalculation of cached parameters. +.It Fl m Ar makefile-name +Set output Makefile name to +.Ar makefile-name . +The default name is ``<conf-name>.mk''. +.It Fl q +Quiet operation. Status messages are suppressed. +.El +.Sh CRUNCHGEN CONFIGURATION FILE COMMANDS + +.Nm Crunchgen +reads specifications from the +.Ar conf-file +that describe the components of the crunched binary. In its simplest +use, the component program names are merely listed along with the +top-level source directories in which their sources can be found. +.Nm Crunchgen +then calculates (via the source makefiles) and caches the +list of object files and their locations. For more specialized +situations, the user can specify by hand all the parameters that +.Nm crunchgen +needs. +.Pp +The +.Ar conf-file +commands are as follows: +.Bl -tag -width indent +.It Nm srcdirs Ar dirname ... +A list of source trees in which the source directories of the +component programs can be found. These dirs are searched using the +BSD ``<source-dir>/<progname>/'' convention. Multiple +.Nm srcdirs +lines can be specified. The directories are searched in the order +they are given. +.It Nm progs Ar progname ... +A list of programs that make up the crunched binary. Multiple +.Nm progs +lines can be specified. +.It Nm libs Ar libspec ... +A list of library specifications to be included in the crunched binary link. +Multiple +.Nm libs +lines can be specified. +.It Nm ln Ar progname linkname +Causes the crunched binary to invoke +.Ar progname +whenever +.Ar linkname +appears in argv[0]. This allows programs that change their behavior when +run under different names to operate correctly. +.El + +To handle specialized situations, such as when the source is not +available or not built via a conventional Makefile, the following +.Nm special +commands can be used to set +.Nm crunchgen +parameters for a component program. +.Bl -tag -width indent +.It Nm special Ar progname Nm srcdir Ar pathname +Set the source directory for +.Ar progname . +This is normally calculated by searching the specified +.Nm srcdirs +for a directory named +.Ar progname . +.It Nm special Ar progname Nm objdir Ar pathname +Set the obj directory for +.Ar progname . +This is normally calculated by looking for a directory named +.Dq Pa obj +under the +.Ar srcdir , +and if that is not found, the +.Ar srcdir +itself becomes the +.Ar objdir . +.It Nm special Ar progname Nm objs Ar object-file-name ... +Set the list of object files for program +.Ar progname . +This is normally calculated by constructing a temporary makefile that includes +.Dq Nm srcdir / Pa Makefile +and outputs the value of $(OBJS). +.It Nm special Ar progname Nm objpaths Ar full-pathname-to-object-file ... +Sets the pathnames of the object files for program +.Ar progname . +This is normally calculated by prepending the +.Nm objdir +pathname to each file in the +.Nm objs +list. +.El + +.Pp +Only the +.Nm objpaths +parameter is actually needed by +.Nm crunchgen , +but it is calculated from +.Nm objdir +and +.Nm objs , +which are in turn calculated from +.Nm srcdir , +so is sometimes convenient to specify the earlier parameters and let +.Nm crunchgen +calculate forward from there if it can. + +.Pp +The makefile produced by +.Nm crunchgen +contains an optional +.Ar objs +target that will build the object files for each component program by +running make inside that program's source directory. For this to work the +.Nm srcdir +and +.Nm objs +parameters must also be valid. If they are not valid for a particular program, that +program is skipped in the +.Ar objs +target. +.Sh EXAMPLE +Here is an example +.Nm crunchgen +input conf file, named +.Dq Pa kcopy.conf : +.Pp +.nf + srcdirs /usr/src/bin /usr/src/sbin + + progs test cp echo sh fsck halt init mount umount myinstall + ln test [ # test can be invoked via [ + ln sh -sh # init invokes the shell with "-sh" in argv[0] + + special myprog objpaths /homes/leroy/src/myinstall.o # no sources + + libs -lutil -lcrypt +.fi +.Pp +This conf file specifies a small crunched binary consisting of some +basic system utilities plus a homegrown install program ``myinstall'', +for which no source directory is specified, but its object file is +specified directly with the +.Nm special +line. +.Pp +The crunched binary ``kcopy'' can be built as follows: +.Pp +.nf + % crunchgen -m Makefile kcopy.conf # gen Makefile and kcopy.c + % make objs # build the component progams' .o files + % make # build the crunched binary kcopy + % kcopy sh # test that this invokes a sh shell + $ # it works! +.fi +.Pp +At this point the binary ``kcopy'' can be copied onto an install floppy +and hard-linked to the names of the component programs. +.Sh SEE ALSO +.Xr crunchide 1 +.Sh CAVEATS +While +.Nm crunch +takes care to eliminate link conflicts between the component programs +of a crunched binary, conflicts are still possible between the +libraries that are linked in. Some shuffling in the order of +libraries may be required, and in some rare cases two libraries may +have an unresolveable conflict and thus cannot be crunched together. +.Pp +Some versions of the BSD build environment do not by default build the +intermediate object file for single-source file programs. The ``make +objs'' target must then be used to get those object files built, or +some other arrangements made. +.Sh AUTHOR +.Nm Crunch +was written by James da Silva <jds@cs.umd.edu>. +.sp 0 +Copyright (c) 1994 University of Maryland. All Rights Reserved. diff --git a/usr.sbin/crunch/crunchgen/crunchgen.c b/usr.sbin/crunch/crunchgen/crunchgen.c new file mode 100644 index 0000000..6e9af18 --- /dev/null +++ b/usr.sbin/crunch/crunchgen/crunchgen.c @@ -0,0 +1,856 @@ +/* + * Copyright (c) 1994 University of Maryland + * All Rights Reserved. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of U.M. not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. U.M. makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M. + * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Author: James da Silva, Systems Design and Analysis Group + * Computer Science Department + * University of Maryland at College Park + */ +/* + * ======================================================================== + * crunchgen.c + * + * Generates a Makefile and main C file for a crunched executable, + * from specs given in a .conf file. + */ +#include <stdlib.h> +#include <unistd.h> +#include <stdio.h> +#include <ctype.h> +#include <string.h> + +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/param.h> + +#define CRUNCH_VERSION "0.2" + +#define MAXLINELEN 16384 +#define MAXFIELDS 2048 + + +/* internal representation of conf file: */ + +/* simple lists of strings suffice for most parms */ + +typedef struct strlst { + struct strlst *next; + char *str; +} strlst_t; + +/* progs have structure, each field can be set with "special" or calculated */ + +typedef struct prog { + struct prog *next; + char *name, *ident; + char *srcdir, *objdir; + strlst_t *objs, *objpaths; + strlst_t *links; + int goterror; +} prog_t; + + +/* global state */ + +strlst_t *srcdirs = NULL; +strlst_t *libs = NULL; +prog_t *progs = NULL; + +char line[MAXLINELEN]; + +char confname[MAXPATHLEN], infilename[MAXPATHLEN]; +char outmkname[MAXPATHLEN], outcfname[MAXPATHLEN], execfname[MAXPATHLEN]; +char tempfname[MAXPATHLEN], cachename[MAXPATHLEN], curfilename[MAXPATHLEN]; +int linenum = -1; +int goterror = 0; + +char *pname = "crunchgen"; + +int verbose, readcache; /* options */ +int reading_cache; + +/* general library routines */ + +void status(char *str); +void out_of_memory(void); +void add_string(strlst_t **listp, char *str); +int is_dir(char *pathname); +int is_nonempty_file(char *pathname); + +/* helper routines for main() */ + +void usage(void); +void parse_conf_file(void); +void gen_outputs(void); + + +int main(int argc, char **argv) +{ + char *p; + int optc; + extern int optind; + extern char *optarg; + + verbose = 1; + readcache = 1; + *outmkname = *outcfname = *execfname = '\0'; + + if(argc > 0) pname = argv[0]; + + while((optc = getopt(argc, argv, "m:c:e:fq")) != -1) { + switch(optc) { + case 'f': readcache = 0; break; + case 'q': verbose = 0; break; + + case 'm': strcpy(outmkname, optarg); break; + case 'c': strcpy(outcfname, optarg); break; + case 'e': strcpy(execfname, optarg); break; + + case '?': + default: usage(); + } + } + + argc -= optind; + argv += optind; + + if(argc != 1) usage(); + + /* + * generate filenames + */ + + strcpy(infilename, argv[0]); + + /* confname = `basename infilename .conf` */ + + if((p=strrchr(infilename, '/')) != NULL) strcpy(confname, p+1); + else strcpy(confname, infilename); + if((p=strrchr(confname, '.')) != NULL && !strcmp(p, ".conf")) *p = '\0'; + + if(!*outmkname) sprintf(outmkname, "%s.mk", confname); + if(!*outcfname) sprintf(outcfname, "%s.c", confname); + if(!*execfname) sprintf(execfname, "%s", confname); + + sprintf(cachename, "%s.cache", confname); + sprintf(tempfname, ".tmp_%sXXXXXX", confname); + if(mktemp(tempfname) == NULL) { + perror(tempfname); + exit(1); + } + + parse_conf_file(); + gen_outputs(); + + exit(goterror); +} + + +void usage(void) +{ + fprintf(stderr, + "%s [-fq] [-m <makefile>] [-c <c file>] [-e <exec file>] <conffile>\n", + pname); + exit(1); +} + + +/* + * ======================================================================== + * parse_conf_file subsystem + * + */ + +/* helper routines for parse_conf_file */ + +void parse_one_file(char *filename); +void parse_line(char *line, int *fc, char **fv, int nf); +void add_srcdirs(int argc, char **argv); +void add_progs(int argc, char **argv); +void add_link(int argc, char **argv); +void add_libs(int argc, char **argv); +void add_special(int argc, char **argv); + +prog_t *find_prog(char *str); +void add_prog(char *progname); + + +void parse_conf_file(void) +{ + if(!is_nonempty_file(infilename)) { + fprintf(stderr, "%s: fatal: input file \"%s\" not found.\n", + pname, infilename); + exit(1); + } + parse_one_file(infilename); + if(readcache && is_nonempty_file(cachename)) { + reading_cache = 1; + parse_one_file(cachename); + } +} + + +void parse_one_file(char *filename) +{ + char *fieldv[MAXFIELDS]; + int fieldc; + void (*f)(int c, char **v); + FILE *cf; + + sprintf(line, "reading %s", filename); + status(line); + strcpy(curfilename, filename); + + if((cf = fopen(curfilename, "r")) == NULL) { + perror(curfilename); + goterror = 1; + return; + } + + linenum = 0; + while(fgets(line, MAXLINELEN, cf) != NULL) { + linenum++; + parse_line(line, &fieldc, fieldv, MAXFIELDS); + if(fieldc < 1) continue; + if(!strcmp(fieldv[0], "srcdirs")) f = add_srcdirs; + else if(!strcmp(fieldv[0], "progs")) f = add_progs; + else if(!strcmp(fieldv[0], "ln")) f = add_link; + else if(!strcmp(fieldv[0], "libs")) f = add_libs; + else if(!strcmp(fieldv[0], "special")) f = add_special; + else { + fprintf(stderr, "%s:%d: skipping unknown command `%s'.\n", + curfilename, linenum, fieldv[0]); + goterror = 1; + continue; + } + if(fieldc < 2) { + fprintf(stderr, + "%s:%d: %s command needs at least 1 argument, skipping.\n", + curfilename, linenum, fieldv[0]); + goterror = 1; + continue; + } + f(fieldc, fieldv); + } + + if(ferror(cf)) { + perror(curfilename); + goterror = 1; + } + fclose(cf); +} + + +void parse_line(char *line, int *fc, char **fv, int nf) +{ + char *p; + + p = line; + *fc = 0; + while(1) { + while(isspace(*p)) p++; + if(*p == '\0' || *p == '#') break; + + if(*fc < nf) fv[(*fc)++] = p; + while(*p && !isspace(*p) && *p != '#') p++; + if(*p == '\0' || *p == '#') break; + *p++ = '\0'; + } + if(*p) *p = '\0'; /* needed for '#' case */ +} + + +void add_srcdirs(int argc, char **argv) +{ + int i; + + for(i=1;i<argc;i++) { + if(is_dir(argv[i])) + add_string(&srcdirs, argv[i]); + else { + fprintf(stderr, "%s:%d: `%s' is not a directory, skipping it.\n", + curfilename, linenum, argv[i]); + goterror = 1; + } + } +} + + +void add_progs(int argc, char **argv) +{ + int i; + + for(i=1;i<argc;i++) + add_prog(argv[i]); +} + + +void add_prog(char *progname) +{ + prog_t *p1, *p2; + + /* add to end, but be smart about dups */ + + for(p1 = NULL, p2 = progs; p2 != NULL; p1 = p2, p2 = p2->next) + if(!strcmp(p2->name, progname)) return; + + p2 = malloc(sizeof(prog_t)); + if(p2) p2->name = strdup(progname); + if(!p2 || !p2->name) + out_of_memory(); + + p2->next = NULL; + if(p1 == NULL) progs = p2; + else p1->next = p2; + + p2->ident = p2->srcdir = p2->objdir = NULL; + p2->links = p2->objs = NULL; + p2->goterror = 0; +} + + +void add_link(int argc, char **argv) +{ + int i; + prog_t *p = find_prog(argv[1]); + + if(p == NULL) { + fprintf(stderr, + "%s:%d: no prog %s previously declared, skipping link.\n", + curfilename, linenum, argv[1]); + goterror = 1; + return; + } + for(i=2;i<argc;i++) + add_string(&p->links, argv[i]); +} + + +void add_libs(int argc, char **argv) +{ + int i; + + for(i=1;i<argc;i++) + add_string(&libs, argv[i]); +} + + +void add_special(int argc, char **argv) +{ + int i; + prog_t *p = find_prog(argv[1]); + + if(p == NULL) { + if(reading_cache) return; + fprintf(stderr, + "%s:%d: no prog %s previously declared, skipping special.\n", + curfilename, linenum, argv[1]); + goterror = 1; + return; + } + + if(!strcmp(argv[2], "ident")) { + if(argc != 4) goto argcount; + if((p->ident = strdup(argv[3])) == NULL) + out_of_memory(); + } + else if(!strcmp(argv[2], "srcdir")) { + if(argc != 4) goto argcount; + if((p->srcdir = strdup(argv[3])) == NULL) + out_of_memory(); + } + else if(!strcmp(argv[2], "objdir")) { + if(argc != 4) goto argcount; + if((p->objdir = strdup(argv[3])) == NULL) + out_of_memory(); + } + else if(!strcmp(argv[2], "objs")) { + p->objs = NULL; + for(i=3;i<argc;i++) + add_string(&p->objs, argv[i]); + } + else if(!strcmp(argv[2], "objpaths")) { + p->objpaths = NULL; + for(i=3;i<argc;i++) + add_string(&p->objpaths, argv[i]); + } + else { + fprintf(stderr, "%s:%d: bad parameter name `%s', skipping line.\n", + curfilename, linenum, argv[2]); + goterror = 1; + } + return; + + + argcount: + fprintf(stderr, + "%s:%d: too %s arguments, expected \"special %s %s <string>\".\n", + curfilename, linenum, argc < 4? "few" : "many", argv[1], argv[2]); + goterror = 1; +} + + +prog_t *find_prog(char *str) +{ + prog_t *p; + + for(p = progs; p != NULL; p = p->next) + if(!strcmp(p->name, str)) return p; + + return NULL; +} + + +/* + * ======================================================================== + * gen_outputs subsystem + * + */ + +/* helper subroutines */ + +void remove_error_progs(void); +void fillin_program(prog_t *p); +void gen_specials_cache(void); +void gen_output_makefile(void); +void gen_output_cfile(void); + +void fillin_program_objs(prog_t *p, char *path); +void top_makefile_rules(FILE *outmk); +void prog_makefile_rules(FILE *outmk, prog_t *p); +void output_strlst(FILE *outf, strlst_t *lst); +char *genident(char *str); +char *dir_search(char *progname); + + +void gen_outputs(void) +{ + prog_t *p; + + for(p = progs; p != NULL; p = p->next) + fillin_program(p); + + remove_error_progs(); + gen_specials_cache(); + gen_output_cfile(); + gen_output_makefile(); + status(""); + fprintf(stderr, + "Run \"make -f %s objs exe\" to build crunched binary.\n", + outmkname); +} + + +void fillin_program(prog_t *p) +{ + char path[MAXPATHLEN]; + char *srcparent; + strlst_t *s; + + sprintf(line, "filling in parms for %s", p->name); + status(line); + + if(!p->ident) + p->ident = genident(p->name); + if(!p->srcdir) { + srcparent = dir_search(p->name); + if(srcparent) + sprintf(path, "%s/%s", srcparent, p->name); + if(is_dir(path)) + p->srcdir = strdup(path); + } + if(!p->objdir && p->srcdir) { + sprintf(path, "%s/obj", p->srcdir); + if(is_dir(path)) + p->objdir = strdup(path); + else + p->objdir = p->srcdir; + } + + if(p->srcdir) sprintf(path, "%s/Makefile", p->srcdir); + if(!p->objs && p->srcdir && is_nonempty_file(path)) + fillin_program_objs(p, path); + + if(!p->objpaths && p->objdir && p->objs) + for(s = p->objs; s != NULL; s = s->next) { + sprintf(line, "%s/%s", p->objdir, s->str); + add_string(&p->objpaths, line); + } + + if(!p->srcdir && verbose) + fprintf(stderr, "%s: %s: warning: could not find source directory.\n", + infilename, p->name); + if(!p->objs && verbose) + fprintf(stderr, "%s: %s: warning: could not find any .o files.\n", + infilename, p->name); + + if(!p->objpaths) { + fprintf(stderr, + "%s: %s: error: no objpaths specified or calculated.\n", + infilename, p->name); + p->goterror = goterror = 1; + } +} + +void fillin_program_objs(prog_t *p, char *path) +{ + char *obj, *cp; + int rc; + FILE *f; + + /* discover the objs from the srcdir Makefile */ + + if((f = fopen(tempfname, "w")) == NULL) { + perror(tempfname); + goterror = 1; + return; + } + + fprintf(f, ".include \"%s\"\n", path); + fprintf(f, ".if defined(PROG) && !defined(OBJS)\n"); + fprintf(f, "OBJS=${PROG}.o\n"); + fprintf(f, ".endif\n"); + fprintf(f, "crunchgen_objs:\n\t@echo 'OBJS= '${OBJS}\n"); + fclose(f); + + sprintf(line, "make -f %s crunchgen_objs 2>&1", tempfname); + if((f = popen(line, "r")) == NULL) { + perror("submake pipe"); + goterror = 1; + return; + } + + while(fgets(line, MAXLINELEN, f)) { + if(strncmp(line, "OBJS= ", 6)) { + fprintf(stderr, "make error: %s", line); + goterror = 1; + continue; + } + cp = line + 6; + while(isspace(*cp)) cp++; + while(*cp) { + obj = cp; + while(*cp && !isspace(*cp)) cp++; + if(*cp) *cp++ = '\0'; + add_string(&p->objs, obj); + while(isspace(*cp)) cp++; + } + } + if((rc=pclose(f)) != 0) { + fprintf(stderr, "make error: make returned %d\n", rc); + goterror = 1; + } + unlink(tempfname); +} + +void remove_error_progs(void) +{ + prog_t *p1, *p2; + + p1 = NULL; p2 = progs; + while(p2 != NULL) { + if(!p2->goterror) + p1 = p2, p2 = p2->next; + else { + /* delete it from linked list */ + fprintf(stderr, "%s: %s: ignoring program because of errors.\n", + infilename, p2->name); + if(p1) p1->next = p2->next; + else progs = p2->next; + p2 = p2->next; + } + } +} + +void gen_specials_cache(void) +{ + FILE *cachef; + prog_t *p; + + sprintf(line, "generating %s", cachename); + status(line); + + if((cachef = fopen(cachename, "w")) == NULL) { + perror(cachename); + goterror = 1; + return; + } + + fprintf(cachef, "# %s - parm cache generated from %s by crunchgen %s\n\n", + cachename, infilename, CRUNCH_VERSION); + + for(p = progs; p != NULL; p = p->next) { + fprintf(cachef, "\n"); + if(p->srcdir) + fprintf(cachef, "special %s srcdir %s\n", p->name, p->srcdir); + if(p->objdir) + fprintf(cachef, "special %s objdir %s\n", p->name, p->objdir); + if(p->objs) { + fprintf(cachef, "special %s objs", p->name); + output_strlst(cachef, p->objs); + } + fprintf(cachef, "special %s objpaths", p->name); + output_strlst(cachef, p->objpaths); + } + fclose(cachef); +} + + +void gen_output_makefile(void) +{ + prog_t *p; + FILE *outmk; + + sprintf(line, "generating %s", outmkname); + status(line); + + if((outmk = fopen(outmkname, "w")) == NULL) { + perror(outmkname); + goterror = 1; + return; + } + + fprintf(outmk, "# %s - generated from %s by crunchgen %s\n\n", + outmkname, infilename, CRUNCH_VERSION); + + top_makefile_rules(outmk); + + for(p = progs; p != NULL; p = p->next) + prog_makefile_rules(outmk, p); + + fprintf(outmk, "\n# ========\n"); + fclose(outmk); +} + + +void gen_output_cfile(void) +{ + extern char *crunched_skel[]; + char **cp; + FILE *outcf; + prog_t *p; + strlst_t *s; + + sprintf(line, "generating %s", outcfname); + status(line); + + if((outcf = fopen(outcfname, "w")) == NULL) { + perror(outcfname); + goterror = 1; + return; + } + + fprintf(outcf, + "/* %s - generated from %s by crunchgen %s */\n", + outcfname, infilename, CRUNCH_VERSION); + + fprintf(outcf, "#define EXECNAME \"%s\"\n", execfname); + for(cp = crunched_skel; *cp != NULL; cp++) + fprintf(outcf, "%s\n", *cp); + + for(p = progs; p != NULL; p = p->next) + fprintf(outcf, "extern int _crunched_%s_stub();\n", p->ident); + + fprintf(outcf, "\nstruct stub entry_points[] = {\n"); + for(p = progs; p != NULL; p = p->next) { + fprintf(outcf, "\t{ \"%s\", _crunched_%s_stub },\n", + p->name, p->ident); + for(s = p->links; s != NULL; s = s->next) + fprintf(outcf, "\t{ \"%s\", _crunched_%s_stub },\n", + s->str, p->ident); + } + + fprintf(outcf, "\t{ EXECNAME, crunched_main },\n"); + fprintf(outcf, "\t{ NULL, NULL }\n};\n"); + fclose(outcf); +} + + +char *genident(char *str) +{ + char *n,*s,*d; + + /* + * generates a Makefile/C identifier from a program name, mapping '-' to + * '_' and ignoring all other non-identifier characters. This leads to + * programs named "foo.bar" and "foobar" to map to the same identifier. + */ + + if((n = strdup(str)) == NULL) + return NULL; + for(d = s = n; *s != '\0'; s++) { + if(*s == '-') *d++ = '_'; + else if(*s == '_' || isalnum(*s)) *d++ = *s; + } + *d = '\0'; + return n; +} + + +char *dir_search(char *progname) +{ + char path[MAXPATHLEN]; + strlst_t *dir; + + for(dir=srcdirs; dir != NULL; dir=dir->next) { + sprintf(path, "%s/%s", dir->str, progname); + if(is_dir(path)) return dir->str; + } + return NULL; +} + + +void top_makefile_rules(FILE *outmk) +{ + prog_t *p; + + fprintf(outmk, "LIBS="); + output_strlst(outmk, libs); + + fprintf(outmk, "CRUNCHED_OBJS="); + for(p = progs; p != NULL; p = p->next) + fprintf(outmk, " %s.lo", p->name); + fprintf(outmk, "\n"); + + fprintf(outmk, "SUBMAKE_TARGETS="); + for(p = progs; p != NULL; p = p->next) + fprintf(outmk, " %s_make", p->ident); + fprintf(outmk, "\n\n"); + + fprintf(outmk, "%s: %s.o $(CRUNCHED_OBJS)\n", + execfname, execfname); + fprintf(outmk, "\t$(CC) -static -o %s %s.o $(CRUNCHED_OBJS) $(LIBS)\n", + execfname, execfname); + fprintf(outmk, "\tstrip %s\n", execfname); + fprintf(outmk, "all: objs exe\nobjs: $(SUBMAKE_TARGETS)\n"); + fprintf(outmk, "exe: %s\n", execfname); + fprintf(outmk, "clean:\n\trm -f %s *.lo *.o *_stub.c\n", + execfname); +} + + +void prog_makefile_rules(FILE *outmk, prog_t *p) +{ + fprintf(outmk, "\n# -------- %s\n\n", p->name); + + if(p->srcdir && p->objs) { + fprintf(outmk, "%s_SRCDIR=%s\n", p->ident, p->srcdir); + fprintf(outmk, "%s_OBJS=", p->ident); + output_strlst(outmk, p->objs); + fprintf(outmk, "%s_make:\n", p->ident); + fprintf(outmk, "\t(cd $(%s_SRCDIR); make $(%s_OBJS))\n\n", + p->ident, p->ident); + } + else + fprintf(outmk, "%s_make:\n\t@echo \"** cannot make objs for %s\"\n\n", + p->ident, p->name); + + fprintf(outmk, "%s_OBJPATHS=", p->ident); + output_strlst(outmk, p->objpaths); + + fprintf(outmk, "%s_stub.c:\n", p->name); + fprintf(outmk, "\techo \"" + "int _crunched_%s_stub(int argc, char **argv, char **envp)" + "{return main(argc,argv,envp);}\" >%s_stub.c\n", + p->ident, p->name); + fprintf(outmk, "%s.lo: %s_stub.o $(%s_OBJPATHS)\n", + p->name, p->name, p->ident); + fprintf(outmk, "\tld -dc -r -o %s.lo %s_stub.o $(%s_OBJPATHS)\n", + p->name, p->name, p->ident); + fprintf(outmk, "\tcrunchide -k __crunched_%s_stub %s.lo\n", + p->ident, p->name); +} + +void output_strlst(FILE *outf, strlst_t *lst) +{ + for(; lst != NULL; lst = lst->next) + fprintf(outf, " %s", lst->str); + fprintf(outf, "\n"); +} + + +/* + * ======================================================================== + * general library routines + * + */ + +void status(char *str) +{ + static int lastlen = 0; + int len, spaces; + + if(!verbose) return; + + len = strlen(str); + spaces = lastlen - len; + if(spaces < 1) spaces = 1; + + fprintf(stderr, " [%s]%*.*s\r", str, spaces, spaces, " "); + fflush(stderr); + lastlen = len; +} + + +void out_of_memory(void) +{ + fprintf(stderr, "%s: %d: out of memory, stopping.\n", infilename, linenum); + exit(1); +} + + +void add_string(strlst_t **listp, char *str) +{ + strlst_t *p1, *p2; + + /* add to end, but be smart about dups */ + + for(p1 = NULL, p2 = *listp; p2 != NULL; p1 = p2, p2 = p2->next) + if(!strcmp(p2->str, str)) return; + + p2 = malloc(sizeof(strlst_t)); + if(p2) p2->str = strdup(str); + if(!p2 || !p2->str) + out_of_memory(); + + p2->next = NULL; + if(p1 == NULL) *listp = p2; + else p1->next = p2; +} + + +int is_dir(char *pathname) +{ + struct stat buf; + + if(stat(pathname, &buf) == -1) + return 0; + return S_ISDIR(buf.st_mode); +} + +int is_nonempty_file(char *pathname) +{ + struct stat buf; + + if(stat(pathname, &buf) == -1) + return 0; + + return S_ISREG(buf.st_mode) && buf.st_size > 0; +} diff --git a/usr.sbin/crunch/crunchgen/mkskel.sh b/usr.sbin/crunch/crunchgen/mkskel.sh new file mode 100644 index 0000000..fd53d78 --- /dev/null +++ b/usr.sbin/crunch/crunchgen/mkskel.sh @@ -0,0 +1,15 @@ +#! /bin/sh +# idea and sed lines taken straight from flex + +cat <<!EOF +/* File created via mkskel.sh */ + +char *crunched_skel[] = { +!EOF + +sed 's/\\/&&/g' $* | sed 's/"/\\"/g' | sed 's/.*/ "&",/' + +cat <<!EOF + 0 +}; +!EOF diff --git a/usr.sbin/crunch/crunchide/Makefile b/usr.sbin/crunch/crunchide/Makefile new file mode 100644 index 0000000..f6e1a8a --- /dev/null +++ b/usr.sbin/crunch/crunchide/Makefile @@ -0,0 +1,4 @@ + +PROG= crunchide + +.include <bsd.prog.mk> diff --git a/usr.sbin/crunch/crunchide/crunchide.1 b/usr.sbin/crunch/crunchide/crunchide.1 new file mode 100644 index 0000000..38a04cf --- /dev/null +++ b/usr.sbin/crunch/crunchide/crunchide.1 @@ -0,0 +1,68 @@ +.\" +.\" Copyright (c) 1994 University of Maryland +.\" All Rights Reserved. +.\" +.\" Permission to use, copy, modify, distribute, and sell this software and its +.\" documentation for any purpose is hereby granted without fee, provided that +.\" the above copyright notice appear in all copies and that both that +.\" copyright notice and this permission notice appear in supporting +.\" documentation, and that the name of U.M. not be used in advertising or +.\" publicity pertaining to distribution of the software without specific, +.\" written prior permission. U.M. makes no representations about the +.\" suitability of this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.\" U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M. +.\" BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR +.\" IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +.\" +.\" Author: James da Silva, Systems Design and Analysis Group +.\" Computer Science Department +.\" University of Maryland at College Park +.\" +.Dd June 14, 1994 +.Dt CRUNCHIDE 1 +.Os BSD 4 +.Sh NAME +.Nm crunchide +.Nd hides symbol names from ld, for crunching programs together +.Sh SYNOPSIS +.Nm crunchide +.Op Fl f Ar keep-list-file +.Op Fl k Ar keep-symbol +.Op Ar object-file ... +.Sh DESCRIPTION + +.Nm Crunchide +hides the global symbols of +.Ar object-file +such that they are ignored by subsequent runs of the linker, +.Xr ld 1 . +Some symbols may be left visible via the +.Fl k Ar keep-symbol +and +.Fl f Ar keep-list-file +options. The +.Ar keep-list-file +must contain a list of symbols to keep visible, one symbol per line. +Note that the C compiler prepends an underscore in front of +symbols, so to keep the C function ``foo'' visible, the option +\&``-k _foo'' must be used. + +.Pp +.Nm Crunchide +is designed as a companion program for +.Xr crunchgen 1 , +which automates the process of creating crunched binaries from +multiple component programs. +.Sh SEE ALSO +.Xr crunchgen 1 , +.Xr ld 1 +.Sh AUTHOR +.Nm Crunch +was written by James da Silva <jds@cs.umd.edu>. +.sp 0 +Copyright (c) 1994 University of Maryland. All Rights Reserved. diff --git a/usr.sbin/crunch/crunchide/crunchide.c b/usr.sbin/crunch/crunchide/crunchide.c new file mode 100644 index 0000000..ae54da0 --- /dev/null +++ b/usr.sbin/crunch/crunchide/crunchide.c @@ -0,0 +1,321 @@ +/* + * Copyright (c) 1994 University of Maryland + * All Rights Reserved. + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that + * copyright notice and this permission notice appear in supporting + * documentation, and that the name of U.M. not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. U.M. makes no representations about the + * suitability of this software for any purpose. It is provided "as is" + * without express or implied warranty. + * + * U.M. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL U.M. + * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION + * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + * Author: James da Silva, Systems Design and Analysis Group + * Computer Science Department + * University of Maryland at College Park + */ +/* + * crunchide.c - tiptoes through an a.out symbol table, hiding all defined + * global symbols. Allows the user to supply a "keep list" of symbols + * that are not to be hidden. This program relies on the use of the + * linker's -dc flag to actually put global bss data into the file's + * bss segment (rather than leaving it as undefined "common" data). + * + * The point of all this is to allow multiple programs to be linked + * together without getting multiple-defined errors. + * + * For example, consider a program "foo.c". It can be linked with a + * small stub routine, called "foostub.c", eg: + * int foo_main(int argc, char **argv){ return main(argc, argv); } + * like so: + * cc -c foo.c foostub.c + * ld -dc -r foo.o foostub.o -o foo.combined.o + * crunchide -k _foo_main foo.combined.o + * at this point, foo.combined.o can be linked with another program + * and invoked with "foo_main(argc, argv)". foo's main() and any + * other globals are hidden and will not conflict with other symbols. + * + * TODO: + * - resolve the theoretical hanging reloc problem (see check_reloc() + * below). I have yet to see this problem actually occur in any real + * program. In what cases will gcc/gas generate code that needs a + * relative reloc from a global symbol, other than PIC? The + * solution is to not hide the symbol from the linker in this case, + * but to generate some random name for it so that it doesn't link + * with anything but holds the place for the reloc. + * - arrange that all the BSS segments start at the same address, so + * that the final crunched binary BSS size is the max of all the + * component programs' BSS sizes, rather than their sum. + */ +#include <unistd.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <a.out.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <sys/errno.h> + +char *pname = "crunchide"; + +void usage(void); + +void add_to_keep_list(char *symbol); +void add_file_to_keep_list(char *filename); + +void hide_syms(char *filename); + + +int main(argc, argv) +int argc; +char **argv; +{ + int ch; + + if(argc > 0) pname = argv[0]; + + while ((ch = getopt(argc, argv, "k:f:")) != EOF) + switch(ch) { + case 'k': + add_to_keep_list(optarg); + break; + case 'f': + add_file_to_keep_list(optarg); + break; + default: + usage(); + } + + argc -= optind; + argv += optind; + + if(argc == 0) usage(); + + while(argc) { + hide_syms(*argv); + argc--, argv++; + } + + return 0; +} + +void usage(void) +{ + fprintf(stderr, + "Usage: %s [-k <symbol-name>] [-f <keep-list-file>] <files> ...\n", + pname); + exit(1); +} + +/* ---------------------------- */ + +struct keep { + struct keep *next; + char *sym; +} *keep_list; + +void add_to_keep_list(char *symbol) +{ + struct keep *newp, *prevp, *curp; + int cmp; + + for(curp = keep_list, prevp = NULL; curp; prevp = curp, curp = curp->next) + if((cmp = strcmp(symbol, curp->sym)) <= 0) break; + + if(curp && cmp == 0) + return; /* already in table */ + + newp = (struct keep *) malloc(sizeof(struct keep)); + if(newp) newp->sym = strdup(symbol); + if(newp == NULL || newp->sym == NULL) { + fprintf(stderr, "%s: out of memory for keep list\n", pname); + exit(1); + } + + newp->next = curp; + if(prevp) prevp->next = newp; + else keep_list = newp; +} + +int in_keep_list(char *symbol) +{ + struct keep *curp; + int cmp; + + for(curp = keep_list; curp; curp = curp->next) + if((cmp = strcmp(symbol, curp->sym)) <= 0) break; + + return curp && cmp == 0; +} + +void add_file_to_keep_list(char *filename) +{ + FILE *keepf; + char symbol[1024]; + int len; + + if((keepf = fopen(filename, "r")) == NULL) { + perror(filename); + usage(); + } + + while(fgets(symbol, 1024, keepf)) { + len = strlen(symbol); + if(len && symbol[len-1] == '\n') + symbol[len-1] = '\0'; + + add_to_keep_list(symbol); + } + fclose(keepf); +} + +/* ---------------------- */ + +int nsyms, ntextrel, ndatarel; +struct exec *hdrp; +char *aoutdata, *strbase; +struct relocation_info *textrel, *datarel; +struct nlist *symbase; + + +#define SYMSTR(sp) &strbase[(sp)->n_un.n_strx] + +/* is the symbol a global symbol defined in the current file? */ +#define IS_GLOBAL_DEFINED(sp) \ + (((sp)->n_type & N_EXT) && ((sp)->n_type & N_TYPE) != N_UNDF) + +/* is the relocation entry dependent on a symbol? */ +#define IS_SYMBOL_RELOC(rp) \ + ((rp)->r_extern||(rp)->r_baserel||(rp)->r_jmptable) + +void check_reloc(char *filename, struct relocation_info *relp); + +void hide_syms(char *filename) +{ + int inf, outf, rc; + struct stat infstat; + struct relocation_info *relp; + struct nlist *symp; + + /* + * Open the file and do some error checking. + */ + + if((inf = open(filename, O_RDWR)) == -1) { + perror(filename); + return; + } + + if(fstat(inf, &infstat) == -1) { + perror(filename); + close(inf); + return; + } + + if(infstat.st_size < sizeof(struct exec)) { + fprintf(stderr, "%s: short file\n", filename); + close(inf); + return; + } + + /* + * Read the entire file into memory. XXX - Really, we only need to + * read the header and from TRELOFF to the end of the file. + */ + + if((aoutdata = (char *) malloc(infstat.st_size)) == NULL) { + fprintf(stderr, "%s: too big to read into memory\n", filename); + close(inf); + return; + } + + if((rc = read(inf, aoutdata, infstat.st_size)) < infstat.st_size) { + fprintf(stderr, "%s: read error: %s\n", filename, + rc == -1? strerror(errno) : "short read"); + close(inf); + return; + } + + /* + * Check the header and calculate offsets and sizes from it. + */ + + hdrp = (struct exec *) aoutdata; + + if(N_BADMAG(*hdrp)) { + fprintf(stderr, "%s: bad magic: not an a.out file\n", filename); + close(inf); + return; + } + +#ifdef __FreeBSD__ + textrel = (struct relocation_info *) (aoutdata + N_RELOFF(*hdrp)); + datarel = (struct relocation_info *) (aoutdata + N_RELOFF(*hdrp) + + hdrp->a_trsize); +#else + textrel = (struct relocation_info *) (aoutdata + N_TRELOFF(*hdrp)); + datarel = (struct relocation_info *) (aoutdata + N_DRELOFF(*hdrp)); +#endif + symbase = (struct nlist *) (aoutdata + N_SYMOFF(*hdrp)); + strbase = (char *) (aoutdata + N_STROFF(*hdrp)); + + ntextrel = hdrp->a_trsize / sizeof(struct relocation_info); + ndatarel = hdrp->a_drsize / sizeof(struct relocation_info); + nsyms = hdrp->a_syms / sizeof(struct nlist); + + /* + * Zap the type field of all globally-defined symbols. The linker will + * subsequently ignore these entries. Don't zap any symbols in the + * keep list. + */ + + for(symp = symbase; symp < symbase + nsyms; symp++) + if(IS_GLOBAL_DEFINED(symp) && !in_keep_list(SYMSTR(symp))) + symp->n_type = 0; + + /* + * Check whether the relocation entries reference any symbols that we + * just zapped. I don't know whether ld can handle this case, but I + * haven't encountered it yet. These checks are here so that the program + * doesn't fail silently should such symbols be encountered. + */ + + for(relp = textrel; relp < textrel + ntextrel; relp++) + check_reloc(filename, relp); + for(relp = datarel; relp < datarel + ndatarel; relp++) + check_reloc(filename, relp); + + /* + * Write the .o file back out to disk. XXX - Really, we only need to + * write the symbol table entries back out. + */ + lseek(inf, 0, SEEK_SET); + if((rc = write(inf, aoutdata, infstat.st_size)) < infstat.st_size) { + fprintf(stderr, "%s: write error: %s\n", filename, + rc == -1? strerror(errno) : "short write"); + } + + close(inf); +} + + +void check_reloc(char *filename, struct relocation_info *relp) +{ + /* bail out if we zapped a symbol that is needed */ + if(IS_SYMBOL_RELOC(relp) && symbase[relp->r_symbolnum].n_type == 0) { + fprintf(stderr, + "%s: oops, have hanging relocation for %s: bailing out!\n", + filename, SYMSTR(&symbase[relp->r_symbolnum])); + exit(1); + } +} diff --git a/usr.sbin/crunch/examples/Makefile b/usr.sbin/crunch/examples/Makefile new file mode 100644 index 0000000..a1681e9 --- /dev/null +++ b/usr.sbin/crunch/examples/Makefile @@ -0,0 +1,32 @@ + +CRUNCHED= fixit + +# below is boiler-plate to make $(CRUNCHED) from $(CRUNCHED).conf +# I'd use PROG instead of CRUNCHED, but the system makefiles REALLY want +# to build things in the normal way if you use PROG. + +CONF= $(CRUNCHED).conf + +OUTMK= $(CRUNCHED).mk +OUTPUTS= $(OUTMK) $(CRUNCHED).c $(CRUNCHED).cache + +NOMAN= +CLEANFILES+=$(CRUNCHED) *.o *.lo *_stub.c +CLEANDIRFILES+=$(OUTPUTS) + +all: $(CRUNCHED) +exe: $(CRUNCHED) + +$(OUTPUTS): $(CONF) + crunchgen ${.CURDIR}/$(CONF) + +$(CRUNCHED): $(OUTPUTS) submake + +submake: + make -f $(OUTMK) +objs: + make -f $(OUTMK) objs +cleandir: + rm -f $(CLEANDIRFILES) + +.include <bsd.prog.mk> diff --git a/usr.sbin/crunch/examples/fixit.conf b/usr.sbin/crunch/examples/fixit.conf new file mode 100644 index 0000000..60ea65b --- /dev/null +++ b/usr.sbin/crunch/examples/fixit.conf @@ -0,0 +1,41 @@ +# fixit.conf - put in anything we think we might want on a fixit floppy + +# first, we list the source dirs that our programs reside in. These are +# searched in order listed to find the dir containing each program. + +srcdirs /usr/src/bin /usr/src/sbin /usr/src/usr.bin /usr/src/usr.sbin +srcdirs /usr/src/gnu/usr.bin + +# second, we list all the programs we want to include in our crunched binary. +# The order doesn't matter. Any program that needs hard links to it gets an +# `ln' directive. + +# /bin stuff + +progs cat chmod cp date dd df echo ed expr hostname kill ln ls mkdir +progs mt mv pwd rcp rm rmdir sh sleep stty sync test + +ln test [ +ln sh -sh # init invokes the shell this way + +# /sbin stuff + +progs badsect chown clri disklabel dump dmesg fdisk fsck halt ifconfig init +progs mknod mount newfs ping reboot restore swapon umount +ln dump rdump +ln restore rrestore + +# /usr/bin stuff + +progs ftp rsh sed telnet rlogin vi + +# gnu stuff + +progs cpio gzip +ln gzip gunzip +ln gzip gzcat + +# finally, we specify the libraries to link in with our binary + +libs -ledit -ltermcap -lcurses +libs -lkvm -lcrypt -ltelnet -lutil -ll diff --git a/usr.sbin/crunch/examples/really-big.conf b/usr.sbin/crunch/examples/really-big.conf new file mode 100644 index 0000000..ce5083f --- /dev/null +++ b/usr.sbin/crunch/examples/really-big.conf @@ -0,0 +1,146 @@ +# really-big.conf - just about everything, just for testing. +# This ends up having some good examples of the use of specials for +# those hard-to-reach programs. I stopped when I got tired, but we +# could probably get even more stuff (like libexec stuff) in here. +# +# This produces a 4608000 byte binary. Pretty sick and twisted, eh? + +# ========================================================================= + +srcdirs /usr/src/bin + +progs cat chmod cp csh date dd df domainname echo ed expr hostname kill +progs ln ls mkdir mt mv ps pwd rcp rm rmail rmdir sh sleep stty sync test + +ln test [ +ln sh -sh + + +# ========================================================================= + +srcdirs /usr/src/sbin + +progs badsect bim clri disklabel dmesg dump dumpfs fdisk fsck halt +progs ifconfig init mknod modload modunload mount mount_fdesc mount_isofs +progs mount_kernfs mount_lofs mount_msdos mount_portal mount_procfs mountd +progs newfs nfsd nfsiod ping quotacheck reboot restore route routed savecore +progs shutdown slattach swapon ttyflags tunefs umount +# shell scripts: fastboot + +ln dump rdump +ln restore rrestore + + +# ========================================================================= + +srcdirs /usr/src/usr.bin + +progs apropos ar asa at basename biff cal calendar cap_mkdb checknr chpass +progs cksum cmp col colcrt colrm column comm compress crontab ctags cut +progs dirname du env error expand false file find finger fmt fold fpr from +progs fsplit fstat ftp getconf getopt gprof head hexdump id indent ipcrm +progs ipcs join kdump ktrace last lastcomm leave lex lock logger locate +progs login logname look m4 machine mail make man mesg mkfifo +progs mkstr modstat more msgs netstat newsyslog nfsstat nice nm nohup +progs pagesize passwd paste patch pr printenv printf quota ranlib +progs renice rev rlogin rpcgen rpcinfo rsh rup ruptime rusers rwall rwho +progs script sed showmount size soelim split strings strip su tail talk +progs tcopy tee telnet tftp time tip tn3270 touch tput tr true tset tsort +progs tty ul uname unexpand unifdef uniq units unvis users uudecode uuencode +progs vacation vgrind vi vis vmstat w wall wc what whatis whereis who +progs whois window write xargs xinstall xstr yacc yes ypcat ypmatch ypwhich + +# shell scripts: lorder mkdep shar which +# problems: rdist uses libcompat.a(regex.o), which conflicts with +# libedit(readline.o) over regerror(). + +# special requirements + +special locate srcdir /usr/src/usr.bin/locate/locate +special tn3270 srcdir /usr/src/usr.bin/tn3270/tn3270 + + +# ========================================================================= + +srcdirs /usr/src/usr.sbin + +progs ac accton amd arp bad144 catman chown chroot config config.new cron +progs dev_mkdb diskpart edquota flcopy gettable grfinfo hilinfo htable inetd +progs iostat iteconfig kvm_mkdb mrouted mtree named portmap pppd +progs pstat pwd_mkdb quot quotaon rarpd rbootd repquota rmt rpc.bootparamd +progs rwhod sa sliplogin slstats spray sysctl syslogd tcpdump +progs traceroute trpt trsp update vipw vnconfig ypbind yppoll ypset + +special amd srcdir /usr/src/usr.sbin/amd/amd +special amd objs vers.amd.o afs_ops.o am_ops.o clock.o util.o xutil.o efs_ops.o mapc.o info_file.o info_hes.o info_ndbm.o info_passwd.o info_nis.o info_union.o map.o srvr_afs.o srvr_nfs.o mntfs.o misc_rpc.o mount_fs.o mtab.o mtab_bsd.o nfs_ops.o nfs_prot_svc.o nfs_start.o nfs_subr.o opts.o pfs_ops.o rpc_fwd.o sched.o sfs_ops.o amq_svc.o amq_subr.o umount_fs.o host_ops.o nfsx_ops.o ufs_ops.o ifs_ops.o amd.o get_args.o restart.o wire.o + + +srcdirs /usr/src/usr.sbin/lpr # lpr subsystem +progs lpr lpc lpq lprm pac lptest +special lpr srcdir /usr/src/usr.sbin/lpr/lpr + +srcdirs /usr/src/usr.sbin/sendmail # sendmail subsystem +progs mailstats makemap praliases sendmail +special sendmail srcdir /usr/src/usr.sbin/sendmail/src +ln sendmail newaliases +ln sendmail mailq + +srcdirs /usr/src/usr.sbin/timed # timed & timedc +progs timed timedc +special timed srcdir /usr/src/usr.sbin/timed/timed + +srcdirs /usr/src/usr.sbin/yp # yp subsystem +progs ypbind ypwhich ypcat ypmatch ypset yppoll + + +# ========================================================================= + +srcdirs /usr/src/gnu/usr.bin + +progs bc cpio diff diff3 gas gawk grep gzip sdiff sort tar +# shell scripts: send-pr + +srcdirs /usr/src/gnu/usr.bin/ld # ldd and ldconfig +progs ld ldd ldconfig + +# rcs stuff loses because there are cross dependencies between librcs.a and +# the individual programs. The solution would be to specify the objpaths +# directly for each one, and include the full path to librcs.a each the +# objpaths. + +# srcdirs /usr/src/gnu/usr.bin/rcs # rcs subsystem +# progs ci co ident merge rcs rcsclean rcsdiff rcsmerge rlog +# # shell script: rcsfreeze +# special rcs srcdir /usr/src/gnu/usr.bin/rcs/rcs +# libs /usr/src/gnu/usr.bin/rcs/lib/obj/librcs.a + +# gdb loses too +# progs gdb +# special gdb srcdir /usr/src/gnu/usr.bin/gdb/gdb +# libs /usr/src/gnu/usr.bin/gdb/bfd/obj/libbfd.a +# libs /usr/src/gnu/usr.bin/gdb/readline/obj/libreadline.a +# libs /usr/src/gnu/usr.bin/gdb/libiberty/obj/libiberty.a + +# groff has the same problem as rcs +# srcdirs /usr/src/gnu/usr.bin/groff # groff subsystem +# progs groff troff tbl pic eqn grops grotty grodvi refer lookbib +# progs indxbib lkbib tfmtodit addftinfo pfbtops psbb +# shell script: nroff +# special groff srcdir /usr/src/gnu/usr.bin/groff/groff +# libs /usr/src/gnu/usr.bin/groff/libgroff/obj/libgroff.a +# libs /usr/src/gnu/usr.bin/groff/libbib/obj/libbib.a +# libs /usr/src/gnu/usr.bin/groff/libdriver/obj/libdriver.a + +srcdirs /usr/src/gnu/usr.bin/gcc2 # gcc & friends +progs cc cpp cc1 + +# cc1 has the same problem as rcs and groff, but since there's only one program +# I'll go ahead and solve it as an example. + +special cc1 objpaths /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-parse.o /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-lang.o /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-lex.o /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-pragma.o /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-decl.o /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-typeck.o /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-convert.o /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-aux-info.o /usr/src/gnu/usr.bin/gcc2/cc1/obj/c-iterate.o /usr/src/gnu/usr.bin/gcc2/common/obj/libcc1.a + +ln gzip gunzip +ln gzip gzcat + +libs -ledit -lgnumalloc -lc -lcrypt -ltermcap -lcurses -ltelnet -lutil -lkvm +libs -ll -ly -lm -lresolv -lrpcsvc -lcompat |