我写的SHELL运行出问题,请指正.

fs_sam

我是为了写一个安装终端绑定的安装的SHELL.因为如果安装了就会在/etc/inittab 文件下面增加多行文字,我的思路是找这些新增的文字,有就不再安装了,没有就安装一次.
SCO OpenServer(TM) Release 5 (c880002.lianshe) (ttyp2)
inittab文件新增部份内容:
s43:234ff:/etc/getty ttys43 m
s44:234ff:/etc/getty ttys44 m
s45:234ff:/etc/getty ttys45 m
s46:234ff:/etc/getty ttys46 m
s47:234ff:/etc/getty ttys47 m
s48:234ff:/etc/getty ttys48 m
pts:2:respawn:/usr/ptsh/fixttyd -f/etc/fixtty.cfg -p3132



test.sh  内容:

str=$`grep "fixttyd" /etc/inittab`
echo $str
if [ $str = "$" ]
then
        echo "没有安装fixttyd"
#        do 安装fixttyd
else
        echo "有安装fixttyd"
        exit 0
fi

waker

if [ $str = "" ]

fs_sam

# sh test.sh
$pts:2:respawn:/usr/ptsh/fixttyd -f/etc/fixtty.cfg -p3132
test.sh: test: unknown operator -f/etc/fixtty.cfg

以上是运行结果

waker

[ "$str" = "" ]

fs_sam

# sh test.sh
$pts:2:respawn:/usr/ptsh/fixttyd -f/etc/fixtty.cfg -p3132
test.sh: test: unknown operator -f/etc/fixtty.cfg
改了后运行结果如上

waker

str=`grep "fixttyd" /etc/inittab`
echo $str
if [ -z "$str" ]

fs_sam

谢谢高手,太谢谢你了
按你的改了,运行正常了.