mirror of
https://github.com/freebsd/freebsd-src
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Add /rescue bits. This basically encompasses all of bin and sbin along
with a couple of bits from usr.bin in a crunchgen'd binary. Submitted by: Tim Kientzle <kientzle@acm.org>
This commit is contained in:
Gordon Tetlow
parent
3c9b856357
commit
884c25d15a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=117035
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@ -63,6 +63,8 @@
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..
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proc mode=0555
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..
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rescue
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..
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root
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..
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sbin
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@ -100,4 +100,39 @@ __BEGIN_DECLS
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const char *getbootfile(void);
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__END_DECLS
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#ifdef RESCUE
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#undef _PATH_DEFPATH
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#define _PATH_DEFPATH "/rescue:/usr/bin:/bin"
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#undef _PATH_STDPATH
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#define _PATH_STDPATH "/rescue:/usr/bin:/bin:/usr/sbin:/sbin"
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#undef _PATH_SYSPATH
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#define _PATH_SYSPATH "/rescue:/sbin:/usr/sbin"
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#undef _PATH_BSHELL
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#define _PATH_BSHELL "/rescue/sh"
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#undef _PATH_CP
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#define _PATH_CP "/rescue/cp"
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#undef _PATH_CSHELL
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#define _PATH_CSHELL "/rescue/csh"
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#undef _PATH_HALT
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#define _PATH_HALT "/rescue/halt"
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#undef _PATH_IFCONFIG
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#define _PATH_IFCONFIG "/rescue/ifconfig"
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#undef _PATH_MDCONFIG
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#define _PATH_MDCONFIG "/rescue/mdconfig"
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#undef _PATH_MOUNT
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#define _PATH_MOUNT "/rescue/mount"
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#undef _PATH_NEWFS
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#define _PATH_NEWFS "/rescue/newfs"
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#undef _PATH_RCP
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#define _PATH_RCP "/rescue/rcp"
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#undef _PATH_REBOOT
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#define _PATH_REBOOT "/rescue/reboot"
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#undef _PATH_RM
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#define _PATH_RM "/rescue/rm"
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#undef _PATH_VI
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#define _PATH_VI "/rescue/vi"
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#undef _PATH_WALL
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#define _PATH_WALL "/rescue/wall"
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#endif /* RESCUE */
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#endif /* !_PATHS_H_ */
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6
rescue/Makefile
Normal file
6
rescue/Makefile
Normal file
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@ -0,0 +1,6 @@
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# $FreeBSD$
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SUBDIR= librescue \
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rescue
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.include <bsd.subdir.mk>
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44
rescue/README
Normal file
44
rescue/README
Normal file
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@ -0,0 +1,44 @@
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The /rescue build system here has three goals:
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1) Produce a reliable standalone set of /rescue tools.
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The contents of /rescue are all statically linked and do not depend on
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anything in /bin or /sbin. In particular, they'll continue to
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function even if you've hosed your dynamic /bin and /sbin. For
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example, note that /rescue/mount runs /rescue/mount_nfs and not
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/sbin/mount_nfs. This is more subtle than it looks.
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As an added bonus, /rescue is fairly small (thanks to crunchgen) and
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includes a number of tools (such as gzip, bzip2, vi) that are not
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normally found in /bin and /sbin.
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2) Demonstrate robust use of crunchgen.
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These Makefiles recompile each of the crunchgen components and include
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support for overriding specific library entries. Such techniques
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should be useful elsewhere. For example, boot floppies could use this
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to conditionally compile out features to reduce executable size.
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3) Produce a toolkit suitable for small distributions.
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Install /rescue on a CD or CompactFlash disk, and symlink /bin and
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/sbin to /rescue to produce a small and fairly complete FreeBSD
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system.
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These tools have one big disadvantage: being statically linked, they
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cannot use some advanced library functions that rely on dynamic
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linking. In particular, nsswitch, locales, and pam are likely to all
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rely on dynamic linking in the near future.
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To compile:
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# cd /usr/src/rescue
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# make obj
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# make
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# make install
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Note that rebuilds don't always work correctly; if you run into
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trouble, try 'make clean' before recompiling.
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$FreeBSD$
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36
rescue/librescue/Makefile
Normal file
36
rescue/librescue/Makefile
Normal file
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@ -0,0 +1,36 @@
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#
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# $FreeBSD$
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#
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# Certain library entries have hard-coded references to
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# /bin, /sbin, etc, that require those entries to be
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# recompiled for use in /rescue. This Makefile
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# accomplishes that. Note that this is pure build hackery.
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# This library should never be installed, and isn't even linked
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# with in the normal way. (See ../rescue/Makefile for details.)
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LIB= rescue
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NOPROFILE= yes # Don't generate profile version
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INTERNALLIB= yes # Don't install this library
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CFLAGS+= -DRESCUE
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# Flags copied from src/lib/libc and src/lib/libutil
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CFLAGS+= -I${.CURDIR}/../../lib/libc/include
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CFLAGS+= -I${.CURDIR}/../../include
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CFLAGS+= -D__DBINTERFACE_PRIVATE
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CFLAGS+= -DINET6
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CFLAGS+= -I${.OBJDIR}/../../lib/libc
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CFLAGS+= -DPOSIX_MISTAKE
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CFLAGS+= -I${.CURDIR}/../../lib/libc/locale
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CFLAGS+= -DBROKEN_DES
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CFLAGS+= -DPORTMAP
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CFLAGS+= -DDES_BUILTIN
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CFLAGS+= -DYP
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CFLAGS+= -DHESIOD
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CFLAGS+= -Wall -Wwrite-strings -Wpointer-arith
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.PATH: ${.CURDIR}/../../lib/libc/gen ${.CURDIR}/../../lib/libutil ${.CURDIR}/../../lib/libc/net ${.CURDIR}/../../lib/libc/stdlib
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SRCS = exec.c getusershell.c login_class.c popen.c rcmdsh.c sysctl.c system.c
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.include <bsd.lib.mk>
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263
rescue/rescue/Makefile
Normal file
263
rescue/rescue/Makefile
Normal file
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@ -0,0 +1,263 @@
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#$FreeBSD$
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# @(#)Makefile 8.1 (Berkeley) 6/2/93
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PROG= rescue
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BINDIR?= /rescue
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# Uncomment to exclude tcsh
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#NO_TCSH=1
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# Shell scripts need #! line to be edited from /bin/sh to /rescue/sh
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SCRIPTS= nextboot_FIXED
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SCRIPTSNAME_nextboot_FIXED= nextboot.sh
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nextboot_FIXED: ../../sbin/reboot/nextboot.sh
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sed '1s/\/bin\//\/rescue\//' ${.ALLSRC} > ${.TARGET}
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CLEANFILES+= nextboot_FIXED
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SCRIPTS+= dhclient_FIXED
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SCRIPTSNAME_dhclient_FIXED= dhclient-script
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dhclient_FIXED: ../../contrib/isc-dhcp/client/scripts/freebsd
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sed '1s/\/bin\//\/rescue\//' ${.ALLSRC} > ${.TARGET}
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CLEANFILES+= dhclient_FIXED
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#################################################################
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#
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# General notes:
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#
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# A number of Make variables are used to generate the crunchgen config file.
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#
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# CRUNCH_SRCDIRS: lists directories to search for included programs
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# CRUNCH_PROGS: lists programs to be included
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# CRUNCH_LIBS: libraries to link with
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# CRUNCH_BUILDOPTS: generic build options to be added to every program
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#
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# Special options can be specified for individual programs
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# CRUNCH_SRCDIR_$(P): base source directory for program $(P)
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# CRUNCH_BUILDOPTS_$(P): additional build options for $(P)
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# CRUNCH_ALIAS_$(P): additional names to be used for $(P)
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#
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# By default, any name appearing in CRUNCH_PROGS or CRUNCH_ALIAS_${P}
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# will be used to generate a hard link to the resulting binary.
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# Specific links can be suppressed by setting
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# CRUNCH_SUPPRESS_LINK_$(NAME) to 1.
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#
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# Define Makefile variable RESCUE
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CRUNCH_BUILDOPTS+= -DRESCUE
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# Define compile-time RESCUE symbol when compiling components
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CRUNCH_BUILDOPTS+= CRUNCH_CFLAGS=-DRESCUE
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#MAKEFLAGS= -m ${.CURDIR} ${.MAKEFLAGS}
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# Hackery: 'librescue' exists merely as a tool for appropriately
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# recompiling specific library entries. We _know_ they're needed, and
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# regular archive searching creates ugly library ordering problems.
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# Easiest fix: tell the linker to include them into the executable
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# first, so they are guaranteed to override the regular lib entries.
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# Note that if 'librescue' hasn't been compiled, we'll just get the
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# regular lib entries from libc and friends.
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CRUNCH_LIBS+= ${.OBJDIR}/../librescue/*.o
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###################################################################
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# Programs from stock /bin
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#
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# WARNING: Changing this list may require adjusting
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# /usr/include/paths.h as well! You were warned!
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#
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CRUNCH_SRCDIRS+=$(.CURDIR)/../../bin $(.CURDIR)/../../usr.bin
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CRUNCH_PROGS=cat chflags chio chmod cp date dd df domainname echo ed \
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expr getfacl hostname kenv kill ln ls mkdir mv pax ps pwd \
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realpath rm rmdir setfacl sh sleep stty sync test
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CRUNCH_LIBS+=-lcrypt -lcrypto -ledit -lkvm -ll -lm -ltermcap -lutil
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# Additional options for specific programs
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CRUNCH_ALIAS_test= [
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CRUNCH_ALIAS_sh= -sh
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# The -sh alias shouldn't appear in /rescue as a hard link
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CRUNCH_SUPPRESS_LINK_-sh=1
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CRUNCH_ALIAS_ln= link
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CRUNCH_ALIAS_rm= unlink
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CRUNCH_ALIAS_ed= red
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.if !defined(NO_RCMNDS)
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CRUNCH_PROGS+= rcp
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.endif
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.if !defined(NO_TCSH)
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CRUNCH_PROGS+= csh
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CRUNCH_ALIAS_csh= -csh tcsh -tcsh
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CRUNCH_SUPPRESS_LINK_-csh=1
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CRUNCH_SUPPRESS_LINK_-tcsh=1
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.endif
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#Is rmail of any use at all here? I think not.
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#CRUNCH_PROGS+= rmail
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###################################################################
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# Programs from standard /sbin
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#
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# WARNING: Changing this list may require adjusting
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# /usr/include/paths.h as well! You were warned!
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#
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# Note that mdmfs and shutdown have their own private 'pathnames.h'
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# headers in addition to the standard 'paths.h' header.
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#
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CRUNCH_SRCDIRS+=$(.CURDIR)/../../sbin
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CRUNCH_PROGS+=atm adjkerntz atacontrol badsect camcontrol ccdconfig \
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clri comcontrol conscontrol devfs disklabel dmesg dump \
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dumpfs dumpon fdisk fore_dnld fsck fsck_ffs fsck_msdosfs fsdb \
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fsirand gbde growfs ifconfig ilmid init ip6fw ipf ipfs ipfstat \
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ipfw ipmon ipnat kldconfig kldload kldstat kldunload ldconfig \
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md5 mdconfig mdmfs mknod mount mount_cd9660 mount_ext2fs \
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mount_msdosfs mount_nfs mount_ntfs mount_nullfs mount_portalfs \
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mount_std mount_udf mount_umapfs mount_unionfs natd newfs \
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newfs_msdos nfsiod nos-tun ping ping6 quotacheck raidctl reboot \
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restore rcorder route routed rtquery rtsol savecore shutdown \
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slattach spppcontrol startslip swapon sysctl tunefs umount vinum
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# crunchgen does not like C++ programs; this should be fixed someday
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# CRUNCH_PROGS+= devd
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CRUNCH_LIBS+=-lalias -latm -lbsdxml -lcam -lcurses -ldevstat -lipsec -lipx \
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-lgeom -lmd -lncp -lreadline -lsbuf -lsmb -lufs -lz
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.if ${MACHINE_ARCH} == "i386"
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CRUNCH_PROGS+= cxconfig mount_nwfs mount_smbfs
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.endif
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.if ${MACHINE} == "pc98"
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CRUNCH_PROGS+= fdisk_pc98
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.endif
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.if ${MACHINE_ARCH} == "ia64"
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CRUNCH_PROGS+= mca gpt
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.endif
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.if ${MACHINE_ARCH} == "sparc"
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.endif
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.if ${MACHINE_ARCH} == "alpha"
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.endif
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CRUNCH_SRCDIR_atm=$(.CURDIR)/../../sbin/atm/atm
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CRUNCH_SRCDIR_fore_dnld=$(.CURDIR)/../../sbin/atm/fore_dnld
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CRUNCH_SRCDIR_ilmid=$(.CURDIR)/../../sbin/atm/ilmid
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CRUNCH_SRCDIR_rtquery=$(.CURDIR)/../../sbin/routed/rtquery
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CRUNCH_ALIAS_reboot= fastboot halt fasthalt
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CRUNCH_ALIAS_restore=rrestore
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CRUNCH_ALIAS_dump= rdump
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CRUNCH_ALIAS_fsck_ffs=fsck_4.2bsd fsck_ufs
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CRUNCH_ALIAS_mount_std= mount_devfs mount_fdescfs mount_linprocfs mount_procfs
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# dhclient has historically been troublesome...
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CRUNCH_PROGS+=dhclient
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CRUNCH_BUILDOPTS_dhclient=-DRELEASE_CRUNCH -Dlint
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##################################################################
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# Programs from stock /usr/bin
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#
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CRUNCH_SRCDIRS+=$(.CURDIR)/../../usr.bin
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CRUNCH_SRCDIRS+=$(.CURDIR)/../../gnu/usr.bin
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CRUNCH_PROGS+=wall
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CRUNCH_PROGS+=gzip
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CRUNCH_ALIAS_gzip=gunzip gzcat zcat
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CRUNCH_PROGS+=bzip2
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CRUNCH_ALIAS_bzip2=bunzip2 bzcat
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CRUNCH_LIBS+=-lbz2
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CRUNCH_PROGS+=tar
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CRUNCH_PROGS+=vi
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CRUNCH_ALIAS_vi=ex
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##################################################################
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# The following is pretty nearly a generic crunchgen-handling makefile
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#
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CONF= $(PROG).conf
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OUTMK= $(PROG).mk
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OUTC= $(PROG).c
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OUTPUTS= $(OUTMK) $(OUTC) $(PROG).cache
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CRUNCHOBJS= ${.OBJDIR}
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.if defined(MAKEOBJDIRPREFIX)
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CANONICALOBJDIR:=${MAKEOBJDIRPREFIX}${.CURDIR}
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.else
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CANONICALOBJDIR:=/usr/obj${.CURDIR}
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.endif
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NOMAN= true
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CLEANFILES+= $(CONF) *.o *.lo *.c *.mk *.cache *.a *.h
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# Program names and their aliases contribute hardlinks to 'rescue' executable,
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# except for those that get suppressed.
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.for P in $(CRUNCH_PROGS)
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.ifndef CRUNCH_SUPPRESS_LINK_${P}
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LINKS += $(BINDIR)/$(PROG) $(BINDIR)/$(P)
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.endif
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.for A in $(CRUNCH_ALIAS_$(P))
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.ifndef CRUNCH_SUPPRESS_LINK_${A}
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LINKS += $(BINDIR)/$(PROG) $(BINDIR)/$(A)
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.endif
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.endfor
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.endfor
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all: $(PROG)
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exe: $(PROG)
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$(CONF): Makefile
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echo \# Auto-generated, do not edit >$(.TARGET)
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.for D in $(CRUNCH_SRCDIRS)
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echo srcdirs $(D) >>$(.TARGET)
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.endfor
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.ifdef CRUNCH_BUILDOPTS
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echo buildopts $(CRUNCH_BUILDOPTS) >>$(.TARGET)
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.endif
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.ifdef CRUNCH_LIBS
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echo libs $(CRUNCH_LIBS) >>$(.TARGET)
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.endif
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.for P in $(CRUNCH_PROGS)
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echo progs $(P) >>$(.TARGET)
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.ifdef CRUNCH_SRCDIR_${P}
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echo special $(P) srcdir $(CRUNCH_SRCDIR_${P}) >>$(.TARGET)
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.endif
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.ifdef CRUNCH_BUILDOPTS_${P}
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echo special $(P) buildopts $(CRUNCH_BUILDOPTS_${P}) >>$(.TARGET)
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.endif
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.for A in $(CRUNCH_ALIAS_$(P))
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echo ln $(P) $(A) >>$(.TARGET)
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.endfor
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.endfor
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$(OUTPUTS): $(CONF)
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MAKEOBJDIRPREFIX=${CRUNCHOBJS} crunchgen -q -m $(OUTMK) -c $(OUTC) $(CONF)
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# -m here forces make to treat the bsd.prog.mk and bsd.lib.mk in
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# this directory as overrides for the standard shared ones.
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$(PROG): $(OUTPUTS)
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MAKEOBJDIRPREFIX=${CRUNCHOBJS} make -f $(OUTMK)
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objs:
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MAKEOBJDIRPREFIX=${CRUNCHOBJS} make -f $(OUTMK) objs
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# Use a separate build tree to hold files compiled for this crunchgen binary
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# Yes, this does seem to partly duplicate bsd.subdir.mk, but I can't
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# get that to cooperate with bsd.prog.mk. Besides, many of the standard
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# targets should NOT be propagated into the components.
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cleandepend cleandir obj objlink:
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.for D in $(CRUNCH_SRCDIRS)
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cd ${D} && MAKEOBJDIRPREFIX=${CANONICALOBJDIR} make ${.TARGET}
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.endfor
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clean:
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rm -f ${CLEANFILES}
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if [ -e ${.OBJDIR}/$(OUTMK) ]; then \
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MAKEOBJDIRPREFIX=${CRUNCHOBJS} make -f $(OUTMK) clean; \
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fi
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.for D in $(CRUNCH_SRCDIRS) $(EXTRA_SRCDIRS)
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cd ${D} && MAKEOBJDIRPREFIX=${CRUNCHOBJS} make clean
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.endfor
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.include <bsd.prog.mk>
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