mtab: make /etc/mtab as a file configurable
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NEWS.md
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NEWS.md
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This file will contain a list of notable changes for each release. Note
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the information in this file is in reverse order.
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## OpenRC-0.18.3
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Modern Linux systems expect /etc/mtab to be a symbolic link to
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/proc/self/mounts. Reasons for this change include support for mount
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namespaces, which will not work if /etc/mtab is a file.
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By default, the mtab service enforces this on each reboot.
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If you find that this breaks your system in some way, please do the
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following:
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- Set mtab_is_file=yes in /etc/conf.d/mtab.
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- Restart mtab. This will recreate the /etc/mtab file.
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- Check for an issue on https://github.com/openrc/openrc/issues
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explaining why you need /etc/mtab to be a file. If there isn't one,
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please open one and explain in detail why you need this to be a file.
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If there is one, please add your comments to it. Please give concrete
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examples of why it is important that /etc/mtab be a file instead of a
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symbolic link. Those comments will be taken into consideration for how
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long to keep supporting mtab as a file or when the support can be
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removed.
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## OpenRC-0.18
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The behaviour of localmount and netmount in this version is changing. In
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@ -15,7 +15,7 @@ include ${MK}/os.mk
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CONF-FreeBSD= ipfw moused powerd rarpd savecore syscons
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CONF-Linux= consolefont devfs dmesg hwclock keymaps killprocs modules
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CONF-Linux= consolefont devfs dmesg hwclock keymaps killprocs modules mtab
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CONF-NetBSD= moused rarpd savecore
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5
conf.d/mtab
Normal file
5
conf.d/mtab
Normal file
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# This setting controls whether /etc/mtab is a file or symbolic link.
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# Most of the time, you shouldn't touch this. However, if the default
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# breaks your system in some way, please see the NEWS.md file that comes
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# with OpenRC for the actions to take.
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# mtab_is_file=no
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@ -14,16 +14,17 @@ start()
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{
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local rc=0
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ebegin "Updating /etc/mtab"
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if [ -L /etc/mtab ] ; then
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ewarn "/etc/mtab is a symlink, not updating."
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ewarn "FYI - You can safely remove mtab from your runlevels."
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elif ! checkpath -W /etc; then
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if ! checkpath -W /etc; then
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rc=1
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elif [ ! -e /etc/mtab ]; then
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einfo "Creating mtab symlink"
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elif ! yesno ${mtab_is_file:-no}; then
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[ ! -L /etc/mtab ] && [ -f /etc/mtab] &&
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ewarn "Removing /etc/mtab file"
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einfo "Creating mtab symbolic link"
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ln -snf /proc/self/mounts /etc/mtab
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else
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einfo "Updating mtab file"
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[ -L /etc/mtab ] && ewarn "Removing /etc/mtab symbolic link"
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rm -f /etc/mtab
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einfo "Creating mtab file"
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# With / as tmpfs we cannot umount -at tmpfs in localmount as that
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# makes / readonly and dismounts all tmpfs even if in use which is
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# not good. Luckily, umount uses /etc/mtab instead of /proc/mounts
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