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-rwxr-xr-xmeta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh220
1 files changed, 220 insertions, 0 deletions
diff --git a/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh b/meta/recipes-core/initscripts/initscripts-1.0/populate-volatile.sh
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1#!/bin/sh
2### BEGIN INIT INFO
3# Provides: volatile
4# Required-Start: $local_fs
5# Required-Stop: $local_fs
6# Default-Start: S
7# Default-Stop:
8# Short-Description: Populate the volatile filesystem
9### END INIT INFO
10
11# Get ROOT_DIR
12DIRNAME=`dirname $0`
13ROOT_DIR=`echo $DIRNAME | sed -ne 's:/etc/.*::p'`
14
15[ -e ${ROOT_DIR}/etc/default/rcS ] && . ${ROOT_DIR}/etc/default/rcS
16# When running populate-volatile.sh at rootfs time, disable cache.
17[ -n "$ROOT_DIR" ] && VOLATILE_ENABLE_CACHE=no
18# If rootfs is read-only, disable cache.
19[ "$ROOTFS_READ_ONLY" = "yes" ] && VOLATILE_ENABLE_CACHE=no
20
21CFGDIR="${ROOT_DIR}/etc/default/volatiles"
22TMPROOT="${ROOT_DIR}/var/volatile/tmp"
23COREDEF="00_core"
24
25[ "${VERBOSE}" != "no" ] && echo "Populating volatile Filesystems."
26
27create_file() {
28 EXEC="
29 touch \"$1\";
30 chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}- for -$1-.\" >/dev/tty0 2>&1;
31 chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\" >/dev/tty0 2>&1 "
32
33 test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >> /etc/volatile.cache.build
34
35 [ -e "$1" ] && {
36 [ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
37 } || {
38 if [ -z "$ROOT_DIR" ]; then
39 eval $EXEC &
40 else
41 # Creating some files at rootfs time may fail and should fail,
42 # but these failures should not be logged to make sure the do_rootfs
43 # process doesn't fail. This does no harm, as this script will
44 # run on target to set up the correct files and directories.
45 eval $EXEC > /dev/null 2>&1
46 fi
47 }
48}
49
50mk_dir() {
51 EXEC="
52 mkdir -p \"$1\";
53 chown ${TUSER}.${TGROUP} $1 || echo \"Failed to set owner -${TUSER}- for -$1-.\" >/dev/tty0 2>&1;
54 chmod ${TMODE} $1 || echo \"Failed to set mode -${TMODE}- for -$1-.\" >/dev/tty0 2>&1 "
55
56 test "$VOLATILE_ENABLE_CACHE" = yes && echo "$EXEC" >> /etc/volatile.cache.build
57 [ -e "$1" ] && {
58 [ "${VERBOSE}" != "no" ] && echo "Target already exists. Skipping."
59 } || {
60 if [ -z "$ROOT_DIR" ]; then
61 eval $EXEC
62 else
63 # For the same reason with create_file(), failures should
64 # not be logged.
65 eval $EXEC > /dev/null 2>&1
66 fi
67 }
68}
69
70link_file() {
71 EXEC="
72 if [ -L \"$2\" ]; then
73 [ \"\$(readlink -f \"$2\")\" != \"\$(readlink -f \"$1\")\" ] && { rm -f \"$2\"; ln -sf \"$1\" \"$2\"; };
74 elif [ -d \"$2\" ]; then
75 cp -a $2/* $1 2>/dev/null;
76 cp -a $2/.[!.]* $1 2>/dev/null;
77 rm -rf \"$2\";
78 ln -sf \"$1\" \"$2\";
79 else
80 ln -sf \"$1\" \"$2\";
81 fi
82 "
83
84 test "$VOLATILE_ENABLE_CACHE" = yes && echo " $EXEC" >> /etc/volatile.cache.build
85
86 if [ -z "$ROOT_DIR" ]; then
87 eval $EXEC &
88 else
89 # For the same reason with create_file(), failures should
90 # not be logged.
91 eval $EXEC > /dev/null 2>&1
92 fi
93}
94
95check_requirements() {
96 cleanup() {
97 rm "${TMP_INTERMED}"
98 rm "${TMP_DEFINED}"
99 rm "${TMP_COMBINED}"
100 }
101
102 CFGFILE="$1"
103 [ `basename "${CFGFILE}"` = "${COREDEF}" ] && return 0
104
105 TMP_INTERMED="${TMPROOT}/tmp.$$"
106 TMP_DEFINED="${TMPROOT}/tmpdefined.$$"
107 TMP_COMBINED="${TMPROOT}/tmpcombined.$$"
108
109 cat ${ROOT_DIR}/etc/passwd | sed 's@\(^:\)*:.*@\1@' | sort | uniq > "${TMP_DEFINED}"
110 cat ${CFGFILE} | grep -v "^#" | cut -s -d " " -f 2 > "${TMP_INTERMED}"
111 cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq > "${TMP_COMBINED}"
112 NR_DEFINED_USERS="`cat "${TMP_DEFINED}" | wc -l`"
113 NR_COMBINED_USERS="`cat "${TMP_COMBINED}" | wc -l`"
114
115 [ "${NR_DEFINED_USERS}" -ne "${NR_COMBINED_USERS}" ] && {
116 echo "Undefined users:"
117 diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
118 cleanup
119 return 1
120 }
121
122
123 cat ${ROOT_DIR}/etc/group | sed 's@\(^:\)*:.*@\1@' | sort | uniq > "${TMP_DEFINED}"
124 cat ${CFGFILE} | grep -v "^#" | cut -s -d " " -f 3 > "${TMP_INTERMED}"
125 cat "${TMP_DEFINED}" "${TMP_INTERMED}" | sort | uniq > "${TMP_COMBINED}"
126
127 NR_DEFINED_GROUPS="`cat "${TMP_DEFINED}" | wc -l`"
128 NR_COMBINED_GROUPS="`cat "${TMP_COMBINED}" | wc -l`"
129
130 [ "${NR_DEFINED_GROUPS}" -ne "${NR_COMBINED_GROUPS}" ] && {
131 echo "Undefined groups:"
132 diff "${TMP_DEFINED}" "${TMP_COMBINED}" | grep "^>"
133 cleanup
134 return 1
135 }
136
137 # Add checks for required directories here
138
139 cleanup
140 return 0
141}
142
143apply_cfgfile() {
144 CFGFILE="$1"
145
146 check_requirements "${CFGFILE}" || {
147 echo "Skipping ${CFGFILE}"
148 return 1
149 }
150
151 cat ${CFGFILE} | grep -v "^#" | \
152 while read LINE; do
153 eval `echo "$LINE" | sed -n "s/\(.*\)\ \(.*\) \(.*\)\ \(.*\)\ \(.*\)\ \(.*\)/TTYPE=\1 ; TUSER=\2; TGROUP=\3; TMODE=\4; TNAME=\5 TLTARGET=\6/p"`
154 TNAME=${ROOT_DIR}${TNAME}
155 [ "${VERBOSE}" != "no" ] && echo "Checking for -${TNAME}-."
156
157 [ "${TTYPE}" = "l" ] && {
158 TSOURCE="$TLTARGET"
159 [ "${VERBOSE}" != "no" ] && echo "Creating link -${TNAME}- pointing to -${TSOURCE}-."
160 link_file "${TSOURCE}" "${TNAME}"
161 continue
162 }
163
164 [ -L "${TNAME}" ] && {
165 [ "${VERBOSE}" != "no" ] && echo "Found link."
166 NEWNAME=`ls -l "${TNAME}" | sed -e 's/^.*-> \(.*\)$/\1/'`
167 echo ${NEWNAME} | grep -v "^/" >/dev/null && {
168 TNAME="`echo ${TNAME} | sed -e 's@\(.*\)/.*@\1@'`/${NEWNAME}"
169 [ "${VERBOSE}" != "no" ] && echo "Converted relative linktarget to absolute path -${TNAME}-."
170 } || {
171 TNAME="${NEWNAME}"
172 [ "${VERBOSE}" != "no" ] && echo "Using absolute link target -${TNAME}-."
173 }
174 }
175
176 case "${TTYPE}" in
177 "f") [ "${VERBOSE}" != "no" ] && echo "Creating file -${TNAME}-."
178 create_file "${TNAME}" &
179 ;;
180 "d") [ "${VERBOSE}" != "no" ] && echo "Creating directory -${TNAME}-."
181 mk_dir "${TNAME}"
182 # Add check to see if there's an entry in fstab to mount.
183 ;;
184 *) [ "${VERBOSE}" != "no" ] && echo "Invalid type -${TTYPE}-."
185 continue
186 ;;
187 esac
188 done
189 return 0
190}
191
192clearcache=0
193exec 9</proc/cmdline
194while read line <&9
195do
196 case "$line" in
197 *clearcache*) clearcache=1
198 ;;
199 *) continue
200 ;;
201 esac
202done
203exec 9>&-
204
205if test -e ${ROOT_DIR}/etc/volatile.cache -a "$VOLATILE_ENABLE_CACHE" = "yes" -a "x$1" != "xupdate" -a "x$clearcache" = "x0"
206then
207 sh ${ROOT_DIR}/etc/volatile.cache
208else
209 rm -f ${ROOT_DIR}/etc/volatile.cache ${ROOT_DIR}/etc/volatile.cache.build
210 for file in `ls -1 "${CFGDIR}" | sort`; do
211 apply_cfgfile "${CFGDIR}/${file}"
212 done
213
214 [ -e ${ROOT_DIR}/etc/volatile.cache.build ] && sync && mv ${ROOT_DIR}/etc/volatile.cache.build ${ROOT_DIR}/etc/volatile.cache
215fi
216
217if [ -z "${ROOT_DIR}" ] && [ -f /etc/ld.so.cache ] && [ ! -f /var/run/ld.so.cache ]
218then
219 ln -s /etc/ld.so.cache /var/run/ld.so.cache
220fi