/[gentoo-x86]/eclass/mount-boot.eclass
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Contents of /eclass/mount-boot.eclass

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Revision 1.23 - (show annotations) (download)
Thu Jul 30 07:16:19 2015 UTC (14 months ago) by vapier
Branch: MAIN
CVS Tags: HEAD
Changes since 1.22: +56 -21 lines
add support for pkg_pretend and split apart the testing/message logic from the actual mount logic so we can provide better details up front #532264 by Ulrich Müller

1 # Copyright 1999-2015 Gentoo Foundation
2 # Distributed under the terms of the GNU General Public License v2
3 # $Header: /var/cvsroot/gentoo-x86/eclass/mount-boot.eclass,v 1.18 2011/01/09 03:18:38 vapier Exp $
4
5 # @ECLASS: mount-boot.eclass
6 # @MAINTAINER:
7 # base-system@gentoo.org
8 # @BLURB: functions for packages that install files into /boot
9 # @DESCRIPTION:
10 # This eclass is really only useful for bootloaders.
11 #
12 # If the live system has a separate /boot partition configured, then this
13 # function tries to ensure that it's mounted in rw mode, exiting with an
14 # error if it can't. It does nothing if /boot isn't a separate partition.
15
16 EXPORT_FUNCTIONS pkg_pretend pkg_preinst pkg_postinst pkg_prerm pkg_postrm
17
18 # @FUNCTION: mount-boot_disabled
19 # @INTERNAL
20 # @DESCRIPTION:
21 # Detect whether the current environment/build settings are such that we do not
22 # want to mess with any mounts.
23 mount-boot_is_disabled() {
24 # Since this eclass only deals with /boot, skip things when ROOT is active.
25 if [[ "${ROOT:-/}" != "/" ]] ; then
26 return 0
27 fi
28
29 # If we're only building a package, then there's no need to check things.
30 if [[ "${MERGE_TYPE}" == "buildonly" ]] ; then
31 return 0
32 fi
33
34 # The user wants us to leave things be.
35 if [[ -n ${DONT_MOUNT_BOOT} ]] ; then
36 return 0
37 fi
38
39 # OK, we want to handle things ourselves.
40 return 1
41 }
42
43 # @FUNCTION: mount-boot_check_status
44 # @INTERNAL
45 # @DESCRIPTION:
46 # Figure out what kind of work we need to do in order to have /boot be sane.
47 # Return values are:
48 # 0 - Do nothing at all!
49 # 1 - It's mounted, but is currently ro, so need to remount rw.
50 # 2 - It's not mounted, so need to mount it rw.
51 mount-boot_check_status() {
52 # Get out fast if possible.
53 mount-boot_is_disabled && return 0
54
55 # note that /dev/BOOT is in the Gentoo default /etc/fstab file
56 local fstabstate=$(awk '!/^#|^[[:blank:]]+#|^\/dev\/BOOT/ {print $2}' /etc/fstab | egrep "^/boot$" )
57 local procstate=$(awk '$2 ~ /^\/boot$/ {print $2}' /proc/mounts)
58 local proc_ro=$(awk '{ print $2 " ," $4 "," }' /proc/mounts | sed -n '/\/boot .*,ro,/p')
59
60 if [ -n "${fstabstate}" ] && [ -n "${procstate}" ] ; then
61 if [ -n "${proc_ro}" ] ; then
62 echo
63 einfo "Your boot partition, detected as being mounted at /boot, is read-only."
64 einfo "It will be remounted in read-write mode temporarily."
65 return 1
66 else
67 echo
68 einfo "Your boot partition was detected as being mounted at /boot."
69 einfo "Files will be installed there for ${PN} to function correctly."
70 return 0
71 fi
72 elif [ -n "${fstabstate}" ] && [ -z "${procstate}" ] ; then
73 echo
74 einfo "Your boot partition was not mounted at /boot, so it will be automounted for you."
75 einfo "Files will be installed there for ${PN} to function correctly."
76 return 2
77 else
78 echo
79 einfo "Assuming you do not have a separate /boot partition."
80 return 0
81 fi
82 }
83
84 mount-boot_pkg_pretend() {
85 # Get out fast if possible.
86 mount-boot_is_disabled && return 0
87
88 elog "To avoid automounting and auto(un)installing with /boot,"
89 elog "just export the DONT_MOUNT_BOOT variable."
90 mount-boot_check_status
91 }
92
93 mount-boot_mount_boot_partition() {
94 mount-boot_check_status
95 case $? in
96 0) # Nothing to do.
97 ;;
98 1) # Remount it rw.
99 mount -o remount,rw /boot
100 if [ $? -ne 0 ] ; then
101 echo
102 eerror "Unable to remount in rw mode. Please do it manually!"
103 die "Can't remount in rw mode. Please do it manually!"
104 fi
105 touch /boot/.e.remount
106 ;;
107 2) # Mount it rw.
108 mount /boot -o rw
109 if [ $? -ne 0 ] ; then
110 echo
111 eerror "Cannot automatically mount your /boot partition."
112 eerror "Your boot partition has to be mounted rw before the installation"
113 eerror "can continue. ${PN} needs to install important files there."
114 die "Please mount your /boot partition manually!"
115 fi
116 touch /boot/.e.mount
117 ;;
118 esac
119 }
120
121 mount-boot_pkg_preinst() {
122 # Handle older EAPIs.
123 case ${EAPI:-0} in
124 [0-3]) mount-boot_pkg_pretend ;;
125 esac
126
127 mount-boot_mount_boot_partition
128 }
129
130 mount-boot_pkg_prerm() {
131 touch "${ROOT}"/boot/.keep 2>/dev/null
132 mount-boot_mount_boot_partition
133 touch "${ROOT}"/boot/.keep 2>/dev/null
134 }
135
136 mount-boot_umount_boot_partition() {
137 # Get out fast if possible.
138 mount-boot_is_disabled && return 0
139
140 if [ -e /boot/.e.remount ] ; then
141 einfo "Automatically remounting /boot as ro as it was previously."
142 rm -f /boot/.e.remount
143 mount -o remount,ro /boot
144 elif [ -e /boot/.e.mount ] ; then
145 einfo "Automatically unmounting /boot as it was previously."
146 rm -f /boot/.e.mount
147 umount /boot
148 fi
149 }
150
151 mount-boot_pkg_postinst() {
152 mount-boot_umount_boot_partition
153 }
154
155 mount-boot_pkg_postrm() {
156 mount-boot_umount_boot_partition
157 }

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