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o Initialize ownerships and permissions. They were garbage (0) for root mounts since vfs_mountroot_try() doesn't ask for them to be set and msdosfs's old incomplete code to set them was removed. The garbage happened to give the correct ownerships root:wheel, but it gave permissions 000 so init could not be execed. Use the macros for root: wheel and 0755. (The removed code gave 0:0 and 0777. 0755 is more normal and secure, thought wrong for /tmp.) o Check the readonly flag for initial (non-MNT_UPDATE) mounts in the correct place, as in ffs. For root mounts, it is only passed in mp->mnt_flags, since vfs_mountroot_try() only passes it as a flag and nothing translates the flag to the "ro" option string. msdosfs only looked for it in the string, so it gave a rw mount for root mounts without even clearing the flag in mp->mnt_flags, so the final state was inconsistent. Checking the flag only in mp->mnt_flags works for initial userland mounts too. The MNT_UPDATE case is messier. The main point that should work but doesn't is fsck of msdosfs root while it is mounted ro. This needs mainly MNT_RELOAD support to work. It should be possible to run fsck -p and succeed provided the fs is consistent, not just for msdosfs, but this fails because fsck -p always tries to open the device rw. The hack that allows open for writing in ffs is not implemented in msdosfs, since without MNT_RELOAD support writing could only be harmful. So fsck must be turned off to use msdosfs as root. This is quite dangerous, since msdosfs is still missing actually using its fs-dirty flag internally, so it is happy to mount dirty fileystems rw. Unrelated changes: - Fix missing error handling for MNT_UPDATE from rw to ro. - Catch up with renaming msdos to msdosfs in a string. Approved by: re (kensmith) |
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bin | ||
cddl | ||
compat/opensolaris | ||
contrib | ||
crypto | ||
etc | ||
games | ||
gnu | ||
include | ||
kerberos5 | ||
lib | ||
libexec | ||
release | ||
rescue | ||
sbin | ||
secure | ||
share | ||
sys | ||
tools | ||
usr.bin | ||
usr.sbin | ||
COPYRIGHT | ||
LOCKS | ||
MAINTAINERS | ||
Makefile | ||
Makefile.inc1 | ||
ObsoleteFiles.inc | ||
README | ||
UPDATING |
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``world'' target should only be used in cases where the source tree has not changed from the currently running version. See: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html