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invalid information will be printed if the -t flag is specified. $ df -t ufs Filesystem 1K-blocks Used Avail Capacity Mounted on /dev/ad0s1a 495726 139944 316124 31% / /dev/ad0s1e 253678 6438 226946 3% /tmp /dev/ad0s1f 56206340 13594248 38115586 26% /usr /dev/ad0s1d 694126 19812 618784 3% /var /dev/ad0s1d 694126 19812 618784 3% /var $ Note that the mount point which is not accessible shows up as the previous file system that was printed. The reason for this is that df -t will call statfs(2) on the pathname supplied by getfsstat(2). This is done to refresh the file system statistics in the event that a previous file system had a long delay in providing its stats. This change affects the df utility in the following ways: o Teach df has to deal with statfs(2) failing. If statfs(2) fails, fall back on the possibly stale stats provided by the initial call to getfsstat(2). o Print a warning that the fs stats could possibly be stale o Modify the man page and document this new behavior as a bug. Approved by: bmilekic (mentor) PR: 68165
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 ``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. 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