[原创]Android启用swap文件sh脚本
上次手机用swapper2差点变砖，可是还是想试试手机开启虚拟内存。
于是想弄清swapper2的原理，今天研究了一天，终于写出来了android下开启虚拟内存的sh~
设备要求:
android + root
android终端 + busybox
*最好能用bash
直接上图:
脚本代码:
注意,换行符需为unix格式才能执行.
因为android终端不支持中文,而且本人英文很弱,所以大部分提示都是谷歌翻译的0.0
#!/system/bin/bash
sfpath=/mnt/sdcard/swapfile
b_nrf=0
if [ $# -eq 0 ] ; then
echo -e "AnSwap Information"
echo -e "Version: 1.0"
echo -e "Author: CserSoft"
echo -e "E-Mail: csersoft@qq.com"
echo -e "*** Be careful using this software! ***\n\n"
echo -e "AnSwap Usage: \n"
echo -e "answap -on <Swap File Size , Units of MB> [-d : Do not remove files] [Swap File Path]"
echo -e "answap -off [-d : Do not remove files] [Swap File Path]\n"
echo -e "Note: [Swap File Path] default is /mnt/sdcard/swapfile\n\n"
echo -e "AnSwap Example: \n"
echo -e "answap -on 128"
echo -e "answap -on 128 -d"
echo -e "answap -off"
echo -e "answap -off -d\n"
echo -e "answap -on 128 /mnt/sdcard/vmfile"
echo -e "answap -on 128 -d /mnt/sdcard/vmfile"
echo -e "answap -off /mnt/sdcard/vmfile"
echo -e "answap -off -d /mnt/sdcard/vmfile"
exit 2
fi
echo -n "Check: busybox ... "
if [ ! -x "/system/bin/busybox" ] && [ ! -x "/system/xbin/busybox" ] ; then
echo "Failed!"
echo "Error: 'busybox' Do not exist or can not be executed !"
echo "Solve: Copy 'busybox' to the '/system/bin' or '/system/xbin' directory !"
exit 3
else
echo "OK!"
fi
echo -n "Check: root ... "
if [ `id -u $USER` -eq 0 ] ; then
echo "OK!"
else
echo "Failed!"
echo "Error: Please run $0 as root !"
exit 4
fi
function EnableSwap()
{
if [[ ! $1 =~ ^[[:digit:]]*$ ]] ; then
echo "Error: '$1' Is not legitimate digital ! "
exit 6
fi
if [ "$1" -lt 32 ] || [ "$1" -gt 512 ] ; then
echo "Error: Swap File Size Should Range From 32 MB To 512 MB !"
exit 7
fi
local sfs=$[$1*1024]
if [[ ! $sfpath =~ ^((/?[a-zA-Z0-9._-]+(/[a-zA-Z0-9._-]+)*)|/)$ ]] ; then
echo "Error: Illegal path '$sfpath' ! "
exit 8
fi
if [ -e "$sfpath" ] ; then
if [ -d "$sfpath" ] ; then
echo "Error: '$sfpath' Already exists , And is a directory !"
exit 9
elif [ -f "$sfpath" ] ; then
echo "Prompt: '$sfpath' Already exists"
if [ $b_nrf -eq 0 ] ; then
echo "Do you want to remove it and continue anyway ?"
echo "Prompt: Please enter 'y' or other :\n"
read -n 1 selprm
if [[ $selprm == "y" ]] ; then
rm -f "$sfpath"
if [ -f "$sfpath" ] ; then
echo "Error: Remove File '$sfpath' Failed !"
exit 10
fi
else
echo "User abort the operation !"
exit 11
fi
fi
else
echo "Error: '$sfpath' Already exists , Unknown File Type !"
exit 12
fi
fi
echo "Swap File Size is: $sfs KBytes"
echo "Swap File Path is: '$sfpath'"
if [ $b_nrf -eq 0 ] ; then
dd if=/dev/zero of="$sfpath" bs=1024 count=$sfs
sleep 1s
if [ ! -f "$sfpath" ] ; then
echo "Error: Create File $sfpath Failed !"
exit 13
fi
fi
mkswap "$sfpath"
sleep 1s
if [ $? -ne 0 ] ; then
echo -e "\nError: 'mkswap' Failed ! "
exit 14
fi
swapon "$sfpath"
sleep 1s
if [ $? -ne 0 ] ; then
echo -e "\nError: 'swapon' Failed ! "
exit 15
else
echo -e "\n'swapon' Succeed ! "
echo "Use the 'free' command to view detailed ! "
fi
}
function DisableSwap()
{
if [[ ! $sfpath =~ ^((/?[a-zA-Z0-9._-]+(/[a-zA-Z0-9._-]+)*)|/)$ ]] ; then
echo "Error: Illegal path '$sfpath' ! "
exit 16
fi
if [ ! -f "$sfpath" ] ; then
echo "Error: '$sfpath' Does not exist ! "
exit 17
fi
swapoff "$sfpath"
sleep 1s
if [ $? -ne 0 ] ; then
echo -e "\nPrompt: 'swapoff' Failed ! "
fi
if [ $b_nrf -eq 0 ] ; then
rm -f "$sfpath"
sleep 1s
if [ -f "$sfpath" ] ; then
echo -e "\nPrompt: Remove File '$sfpath' Failed ! "
else
echo -e "\n'swapoff' Succeed ! "
echo "Use the 'free' command to view detailed ! "
return 0
fi
fi
echo -e "\n'swapoff' Succeed ! "
echo "Use the 'free' command to view detailed ! "
}
if [[ $1 == "-on" ]] ; then
if [[ $3 == "-d" ]] ; then
b_nrf=1
if [[ $4 != "" ]] ; then
sfpath=$4
fi
else
if [[ $3 != "" ]] ; then
sfpath=$3
fi
fi
EnableSwap $2
exit 0
elif [[ $1 == "-off" ]] ; then
if [[ $2 == "-d" ]] ; then
b_nrf=1
if [[ $3 != "" ]] ; then
sfpath=$3
fi
else
if [[ $2 != "" ]] ; then
sfpath=$2
fi
fi
DisableSwap
exit 0
else
echo "Error: Invalid argument of '$1'"
exit 5
fi
第一次写sh脚本，网上抄了不少代码
