diff options
author | Felix Fietkau <nbd@openwrt.org> | 2014-04-07 09:50:19 +0000 |
---|---|---|
committer | Felix Fietkau <nbd@openwrt.org> | 2014-04-07 09:50:19 +0000 |
commit | c27c5b9cbc985a65e9ab62d70cc727587f6749f9 (patch) | |
tree | dbfc12243c5b93c32c38ec4a0c9a8e9735e660c4 /package/base-files/files/lib/functions/preinit.sh | |
parent | e90b69515773b4e176087df0c6cab7cac86e22e4 (diff) | |
download | master-31e0f0ae-c27c5b9cbc985a65e9ab62d70cc727587f6749f9.tar.gz master-31e0f0ae-c27c5b9cbc985a65e9ab62d70cc727587f6749f9.tar.bz2 master-31e0f0ae-c27c5b9cbc985a65e9ab62d70cc727587f6749f9.zip |
/lib/functions.sh: move preinit related functions to /lib/functions/preinit.sh
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 40404
Diffstat (limited to 'package/base-files/files/lib/functions/preinit.sh')
-rw-r--r-- | package/base-files/files/lib/functions/preinit.sh | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/package/base-files/files/lib/functions/preinit.sh b/package/base-files/files/lib/functions/preinit.sh new file mode 100644 index 0000000000..db1f298c8b --- /dev/null +++ b/package/base-files/files/lib/functions/preinit.sh @@ -0,0 +1,87 @@ +#!/bin/sh +# Copyright (C) 2006-2013 OpenWrt.org +# Copyright (C) 2010 Vertical Communications + +boot_hook_splice_start() { + export -n PI_HOOK_SPLICE=1 +} + +boot_hook_splice_finish() { + local hook + for hook in $PI_STACK_LIST; do + local v; eval "v=\${${hook}_splice:+\$${hook}_splice }$hook" + export -n "${hook}=${v% }" + export -n "${hook}_splice=" + done + export -n PI_HOOK_SPLICE= +} + +boot_hook_init() { + local hook="${1}_hook" + export -n "PI_STACK_LIST=${PI_STACK_LIST:+$PI_STACK_LIST }$hook" + export -n "$hook=" +} + +boot_hook_add() { + local hook="${1}_hook${PI_HOOK_SPLICE:+_splice}" + local func="${2}" + + [ -n "$func" ] && { + local v; eval "v=\$$hook" + export -n "$hook=${v:+$v }$func" + } +} + +boot_hook_shift() { + local hook="${1}_hook" + local rvar="${2}" + + local v; eval "v=\$$hook" + [ -n "$v" ] && { + local first="${v%% *}" + + [ "$v" != "${v#* }" ] && \ + export -n "$hook=${v#* }" || \ + export -n "$hook=" + + export -n "$rvar=$first" + return 0 + } + + return 1 +} + +boot_run_hook() { + local hook="$1" + local func + + while boot_hook_shift "$hook" func; do + local ran; eval "ran=\$PI_RAN_$func" + [ -n "$ran" ] || { + export -n "PI_RAN_$func=1" + $func "$1" "$2" + } + done +} + +pivot() { # <new_root> <old_root> + /bin/mount -o noatime,move /proc $1/proc && \ + pivot_root $1 $1$2 && { + /bin/mount -o noatime,move $2/dev /dev + /bin/mount -o noatime,move $2/tmp /tmp + /bin/mount -o noatime,move $2/sys /sys 2>&- + /bin/mount -o noatime,move $2/overlay /overlay 2>&- + return 0 + } +} + +fopivot() { # <rw_root> <ro_root> <dupe?> + /bin/mount -o noatime,lowerdir=/,upperdir=$1 -t overlayfs "overlayfs:$1" /mnt + pivot /mnt $2 +} + +ramoverlay() { + mkdir -p /tmp/root + /bin/mount -t tmpfs -o noatime,mode=0755 root /tmp/root + fopivot /tmp/root /rom 1 +} |