da21d85025
This patch adds support for Unix98 pseudo terminals, that is, posix_openpt(3), grantpt(3), unlockpt(3), /dev/ptmx, and /dev/pts/. The latter is implemented with a new pseudo file system, PTYFS. In effect, this patch adds secure support for unprivileged pseudo terminal allocation, allowing programs such as tmux(1) to be used by non-root users as well. Test77 has been extended with new tests, and no longer needs to run as root. The new functionality is optional. To revert to the old behavior, remove the "ptyfs" entry from /etc/fstab. Technical nodes: o The reason for not implementing the NetBSD /dev/ptm approach is that implementing the corresponding ioctl (TIOCPTMGET) would require adding a number of extremely hairy exceptions to VFS, including the PTY driver having to create new file descriptors for its own device nodes. o PTYFS is required for Unix98 PTYs in order to avoid that the PTY driver has to be aware of old-style PTY naming schemes and even has to call chmod(2) on a disk-backed file system. PTY cannot be its own PTYFS since a character driver may currently not also be a file system. However, PTYFS may be subsumed into a DEVFS in the future. o The Unix98 PTY behavior differs somewhat from NetBSD's, in that slave nodes are created on ptyfs only upon the first call to grantpt(3). This approach obviates the need to revoke access as part of the grantpt(3) call. o Shutting down PTY may leave slave nodes on PTYFS, but once PTY is restarted, these leftover slave nodes will be removed before they create a security risk. Unmounting PTYFS will make existing PTY slaves permanently unavailable, and absence of PTYFS will block allocation of new Unix98 PTYs until PTYFS is (re)mounted. Change-Id: I822b43ba32707c8815fd0f7d5bb7a438f51421c1 |
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.. | ||
lists | ||
attrs | ||
checkflist | ||
comments | ||
culldeps | ||
deps | ||
descrs | ||
getdirs.awk | ||
join.awk | ||
listpkgs | ||
Makefile | ||
makeflist | ||
makeobsolete | ||
makeplist | ||
makesrctars | ||
makesums | ||
maketars | ||
metalog.subr | ||
mkvars.mk | ||
README | ||
regpkg | ||
regpkgset | ||
sets.subr | ||
sort-list | ||
syspkgdeps | ||
TODO | ||
versions |
# $NetBSD: README,v 1.13 2013/08/06 22:33:59 soren Exp $ the scripts should be run from the directory where they reside. makeflist: output the list of files that should be in a distribution, according to the contents of the 'lists' directory. checkflist: check the file list (as internally generated by makeflist) against the tree living in $DESTDIR. (that tree should be made with 'make distribution'.) maketars: make tarballs of the various sets in the distribution, based on the contents of the lists, the tree in $DESTDIR, and put the tarballs in $RELEASEDIR. Note that this script _doesn't_ create the 'secr' distribution, because (for now) it requires manual intervention to get the binaries right... (i'll add another script to create that dist, later.) what's in 'lists': lists describing file sets. There are two sets of lists per file set: machine dependent and machine-independent files. (there's also another file in the 'man' dir, which is used by the 'man' and 'misc' sets, but that's explained later.) There is one machine-independent file, named "mi". There are N machine-dependent files (one per architecture), named "md.${ARCH}". the sets are as follows: base: the base binary set. excludes everything described below. comp: compiler tools. All of the tools relating to C, C++, and FORTRAN (yes, there are two!) that are in the tree. This includes includes, the linker, tool chain, and the .a versions of the libraries. (obviously, base includes ldd, ld.so, and the shared versions. base also includes 'cpp', because that's used by X11.) includes the man pages for all the binaries contained within. Also, includes all library and system call manual pages. debug: Debugging libraries (_g.a/MKDEBUGLIB) and (.debug/MKDEBUG) binaries. etc: /etc, and associated files (/var/cron/tabs, /root, etc.). things that shouldn't be blindly reinstalled on an upgrade. games: the games and their man pages. man: all of the man pages for the system, except those listed elsewhere (e.g. in comp, games, misc, text). Includes machine-dependent man pages for this CPU. misc: share/dict, share/doc, and the machine-dependent man pages for other CPUs which happen to always be installed. modules: stand/${MACHINE}/${OSRELEASE}/modules kernel modules tests: unit, regression, integration and stress tests for the whole system. text: text processing tools. groff and all of its friends. includes man pages for all bins contained within. Each set must contain "./etc/mtree/set.<set name>" within the mi list. Failure to add this will break unprivileged builds.