1d63e85794
The previous test assumed that we could always rely on the minor fault counter to change between reads of /proc/self/stat, but we found that this is not the case. The new test compares two reads of /proc/self/environ for which we have set the same environment variable to two different values. If the comparison shows the two reads have the same contents, we know that /proc is not working. I would like to thank Robin Johnson and Mike Frysinger for their input for this patch. X-Gentoo-Bug: 348416 X-Gentoo-Bug-URL: http://bugs.gentoo.org/show_bug.cgi?id=348416
105 lines
2.9 KiB
Plaintext
105 lines
2.9 KiB
Plaintext
#!@SHELL@
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# Copyright (c) 1999-2007 Gentoo Foundation
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# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
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# All rights reserved. Released under the 2-clause BSD license.
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# This basically mounts $RC_SVCDIR as a ramdisk.
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# The tricky part is finding something our kernel supports
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# tmpfs and ramfs are easy, so force one or the other.
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svcdir_restorecon()
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{
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local rc=0
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if [ -x /usr/sbin/selinuxenabled -a -c /selinux/null ] &&
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selinuxenabled; then
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restorecon $RC_SVCDIR
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rc=$?
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fi
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return $rc
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}
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mount_svcdir()
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{
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# mount from fstab if we can
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fstabinfo --mount "$RC_SVCDIR" && return 0
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local fs= fsopts="-o rw,noexec,nodev,nosuid"
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local svcsize=${rc_svcsize:-1024}
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# Some buggy kernels report tmpfs even when not present :(
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if grep -Eq "[[:space:]]+tmpfs$" /proc/filesystems; then
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local tmpfsopts="${fsopts},mode=755,size=${svcsize}k"
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mount -n -t tmpfs $tmpfsopts rc-svcdir "$RC_SVCDIR"
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if [ $? -eq 0 ]; then
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svcdir_restorecon
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[ $? -eq 0 ] && return 0
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fi
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fi
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if grep -Eq "[[:space:]]+ramfs$" /proc/filesystems; then
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fs="ramfs"
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# ramfs has no special options
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elif [ -e /dev/ram0 ] \
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&& grep -Eq "[[:space:]]+ext2$" /proc/filesystems; then
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devdir="/dev/ram0"
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fs="ext2"
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dd if=/dev/zero of="$devdir" bs=1k count="$svcsize"
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mkfs -t "$fs" -i 1024 -vm0 "$devdir" "$svcsize"
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else
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echo
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eerror "OpenRC requires tmpfs, ramfs or a ramdisk + ext2"
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eerror "compiled into the kernel"
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echo
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return 1
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fi
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mount -n -t "$fs" $fsopts rc-svcdir "$RC_SVCDIR"
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if [ $? -eq 0 ]; then
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svcdir_restorecon
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[ $? -eq 0 ] && return 0
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fi
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}
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. "$RC_LIBEXECDIR"/sh/functions.sh
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[ -r /etc/rc.conf ] && . /etc/rc.conf
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# By default VServer already has /proc mounted, but OpenVZ does not!
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# However, some of our users have an old proc image in /proc
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# NFC how they managed that, but the end result means we have to test if
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# /proc actually works or not. We do this by comparing two reads of
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# /proc/self/environ for which we have set the variable VAR to two
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# different values. If the comparison comes back equal, we know that
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# /proc is not working.
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mountproc=true
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f=/proc/self/environ
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if [ -e $f ]; then
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if [ "$(VAR=a cat $f)" = "$(VAR=b cat $f)" ]; then
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eerror "You have cruft in /proc that should be deleted"
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else
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einfo "/proc is already mounted, skipping"
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mountproc=false
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fi
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fi
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unset f
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if $mountproc; then
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procfs="proc"
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[ "$RC_UNAME" = "GNU/kFreeBSD" ] && proc="linprocfs"
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ebegin "Mounting /proc"
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if ! fstabinfo --mount /proc; then
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mount -n -t "$procfs" -o noexec,nosuid,nodev proc /proc
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fi
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eend $?
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fi
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# Try to mount xenfs as early as possible, otherwise rc_sys() will always
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# return RC_SYS_XENU and will think that we are in a domU while it's not.
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if grep -Eq "[[:space:]]+xenfs$" /proc/filesystems; then
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ebegin "Mounting xenfs"
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if ! fstabinfo --mount /proc/xen; then
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mount -n -t xenfs xenfs /proc/xen -o nosuid,nodev,noexec
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fi
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eend $?
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fi
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. "$RC_LIBEXECDIR"/sh/init-common-post.sh
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