aboutsummaryrefslogtreecommitdiffstats
path: root/package/base-files/files/lib/upgrade/common.sh
blob: 7584b773dd33a750a1415cd60b361166e5d3dacd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
#!/bin/sh

RAM_ROOT=/tmp/root

ldd() { LD_TRACE_LOADED_OBJECTS=1 $*; }
libs() { ldd $* | awk '{print $3}'; }

install_file() { # <file> [ <file> ... ]
	for file in "$@"; do
		dest="$RAM_ROOT/$file"
		[ -f $file -a ! -f $dest ] && {
			dir="$(dirname $dest)"
			mkdir -p "$dir"
			cp $file $dest
		}
	done
}

install_bin() { # <file> [ <symlink> ... ]
	src=$1
	files=$1
	[ -x "$src" ] && files="$src $(libs $src)"
	install_file $files
	shift
	for link in "$@"; do {
		dest="$RAM_ROOT/$link"
		dir="$(dirname $dest)"
		mkdir -p "$dir"
		[ -f "$dest" ] || ln -s $src $dest
	}; done
}

pivot() { # <new_root> <old_root>
	mount | grep "on $1 type" 2>&- 1>&- || mount -o bind $1 $1
	mkdir -p $1$2 $1/proc $1/dev $1/tmp $1/jffs && \
	mount -o move /proc $1/proc && \
	pivot_root $1 $1$2 || {
        umount $1 $1
		return 1
	}
	mount -o move $2/dev /dev
	mount -o move $2/tmp /tmp
	mount -o move $2/jffs /jffs 2>&-
	return 0
}

run_ramfs() { # <command> [...]
	install_bin /bin/busybox /bin/ash /bin/sh /bin/mount /bin/umount /sbin/pivot_root /usr/bin/wget /sbin/reboot /bin/sync /bin/dd /bin/grep /bin/cp /bin/mv /bin/tar /usr/bin/md5sum "/usr/bin/[" /bin/vi /bin/ls /bin/cat
	install_bin /sbin/mtd
	for file in $RAMFS_COPY_BIN; do
		install_bin $file
	done
	install_file /etc/resolv.conf /etc/functions.sh /lib/upgrade/*.sh $RAMFS_COPY_DATA

	pivot $RAM_ROOT /mnt || {
		echo "Failed to switch over to ramfs. Please reboot."
		exit 1
	}

	mount -o remount,ro /mnt
	umount -l /mnt

	grep /jffs /proc/mounts > /dev/null && {
		mount -o remount,ro /jffs
		umount -l /jffs
	}

	# spawn a new shell from ramdisk to reduce the probability of cache issues
	exec /bin/busybox ash -c "$*"
}

run_hooks() {
	local arg="$1"; shift
	for func in "$@"; do
		eval "$func $arg"
	done
}

ask_bool() {
	local default="$1"; shift;
	local answer="$default"

	[ "$INTERACTIVE" -eq 1 ] && {
		case "$default" in
			0) echo -n "$* (y/N): ";;
			*) echo -n "$* (Y/n): ";;
		esac
		read answer
		case "$answer" in
			y*) answer=1;;
			n*) answer=0;;
			*) answer="$default";;
		esac
	}
	[ "$answer" -gt 0 ]
}

v() {
	[ "$VERBOSE" -ge 1 ] && echo "$@"
}

rootfs_type() {
	mount | awk '($3 ~ /^\/$/) && ($5 !~ /rootfs/) { print $5 }'
}

get_image() {
	local from="$1"

	case "$from" in
		http://*|ftp://*) wget -O- -q "$from";;
		*) cat "$from"
	esac
}

get_magic_word() {
	get_image "$1" | dd bs=2 count=1 2>/dev/null | hexdump | awk '$2 { print $2 }'
}

refresh_mtd_partitions() {
	mtd refresh rootfs
}

jffs2_copy_config() {
	if grep rootfs_data /proc/mtd >/dev/null; then
		# squashfs+jffs2
		mtd -e rootfs_data jffs2write "$CONF_TAR" rootfs_data
	else
		# jffs2
		mtd jffs2write "$CONF_TAR" rootfs
	fi
}

do_upgrade() {
	v "Performing system upgrade..."
	platform_do_upgrade "$ARGV"
	
	[ "$SAVE_CONFIG" -eq 1 ] && {
		v "Refreshing partitions"
		if type 'platform_refresh_partitions' >/dev/null 2>/dev/null; then
			platform_refresh_partitions
		else
			refresh_mtd_partitions
		fi
		if type 'platform_copy_config' >/dev/null 2>/dev/null; then
			platform_copy_config
		else
			jffs2_copy_config
		fi
	}
	ask_bool 1 "Reboot" && reboot
}