May 29
2015.07.03 更新，更好的支持 Tomato ARM 版本：
#!/bin/sh
#USE AT YOUR OWN RISK.
#THIS SCRIPT DOES NOT COME WITH ANY WARRANTY WHATSOEVER.
#
#Backs up selected nvram variables in "nvram export --set" format.
#
#Correctly handles multi-line entries.
#
#Thanks to ryzhov_al for basic approach.
#
#Should work equally well with both MIPS and ARM builds.
#
#Looks for a list of items to export in $etc/scriptname.ini
#OR enter items to grep for below.
#
#The items list is a list of regular expressions to match against the
#nvram variable names.
#
#Script assumes all entries are at beginning of line(prefixed with ^).
#
#Leave items list blank to backup up all of nvram. Resulting in essentially
#the same output as MIPS "nvram export --set"
#
#The items list below is only intended as example and is not complete or
#comprehensive. Customize for your own use.
#
#Edit list below if not using .ini file, it is ignored if .ini file is found
items='
DSCP_
atm_overhead
cifs[1-2]
ctf_
ct_
dhcp_
dhcpd_
ddnsx[0-2]
dnsmasq_
dns_
https_
http_enable
http_lanport
http_wanport
http_passwd
lan_hostname
lan_ipaddr
lan_proto
modem_ipaddr
ne_
new_qoslimit_
nf_
ntp_
portforward
ppp_
pppoe_
qos_
qosl_
router_name
rrule[0-9]
cstats_
rstats_
script_
smbd_
sch_
sshd_eas
sshd_forwarding
sshd_motd
sshd_pass
sshd_port
sshd_remote
sshd_rport
tm_
tomatoanon_
usb_
upnp_
wan_dns
wan_proto
wan_hostname
wan_domain
wan_hwaddr
wan_mtu
web_css
web_mx
wl[0-9]_security_mode
wl[0-9]_ssid
wl[0-9]_wpa_psk
'
etc=/opt/etc
base=${0##*/}; base=${base%.*}
config=$etc/$base.ini
#file to output - default to stdout
filename="$1"
curr_date=$(date +"%Y-%m-%d")
if [ $# -eq 0 -o "$filename" = "" ]; then
backupfile="/opt/etc/init.d/nvram_backup-${curr_date}.txt"
else
backupfile="/opt/etc/init.d/${filename}-${curr_date}.txt"
fi
grepstr=$( { [ -r $config ] && cat $config || echo "$items" ; } | sed -e 's/[t ]//g;/^$/d' | sed ':a;N;$!ba;s/n/\|^/g')
{
echo "#Exporting $grepstr"
for item in $(nvram show 2>/dev/null | grep "^.*=" | grep "$grepstr" | grep -v "hwaddr" | awk -F= "{print $1}" | sort -u)
do
item_value="$(nvram get $item | sed 's!([$\"`])!\1!g'; echo nvgetwasnull)"
case $item_value in
nvgetwasnull) ;;
*) echo "nvram set ${item}=\"${item_value%
nvgetwasnull}\"" ;;
esac
done
}>"$backupfile"
比较完美的解决了多行文本框内容的备份，例如脚本等处。
#!/bin/sh
#
#USE AT YOUR OWN RISK.
#THIS SCRIPT DOES NOT COME WITH ANY WARRANTY WHATSOEVER.
#
#file to output
backupfile='/mnt/optware/opt/etc/init.d/nvram_restore.sh'
#Enter strings to grep for here.
#
#Use heredocs to build grep from one entry per
#line for ease of maintenance.
#
#Could easily be changed to read external config file.
#
#sed is not my best skill - there may well be cleaner syntax, and
#admittedly this is some quick cut and paste from another script
grepstr=$(cat << EOF | sed -e 's/[t ]//g;/^$/d' | sed ':a;N;$!ba;s/n/\|/g'
^dhcp_
^dhcpd_
^ddnsx
^dnsmasq
^dns_
^https_
^http_passwd
^lan_hostname
^lan_ipaddr
^wan_dns
^wan_proto
^wan_hostname
^wan_domain
^wan_hwaddr
^router_name
^modem_ipaddr
^rrule1
^cstats_
^rstats_
^qos
^new_qoslimit_
^ctf_
^ct_
^bt_
^ne_
^nf_
^ntp_
^smbd_
^usb_
^upnp_
^script_
^wl[0-9]_security_mode
^wl[0-9]_ssid
^wl[0-9]_wpa_psk
^cifs[0-9]
EOF
)
#uncomment next line if you want to see what above creates
#echo $grepstr
[ -e $backupfile ] && rm $backupfile
echo "echo Restoring NVRAM settings" > $backupfile
echo "echo Note: This will overwrite your current NVRAM settings in NVRAM," >> $backupfile
echo "echo but they will not be permanent unless you do a 'nvram commit'" >> $backupfile
echo "echo Restore NVRAM rules..." >> $backupfile
echo Exporting NVRAM rules to $backupfile
#Below mostly from ryzhov_al
#sed to escape chars is mine, may not be complete.
for item in $(nvram show | grep "$grepstr" | awk -F= "{print $1}")
do
item_value=$(nvram get ${item} | sed 's!([$\"`])!\1!g')
echo "nvram set ${item}=\"$item_value\"" >> $backupfile
done
echo "echo Restore of NVRAM settings complete" >> $backupfile
echo "echo To make them permanent, do: nvram commit" >> $backupfile
chmod +x $backupfile
echo NVRAM settings have been exported to $backupfile
echo Now feel free to try new settings
echo To restore from backup, type: $backupfile
感谢 linksysinfo 的高手们！
