Genesis2000脚本编写常用命令剖析

1. switch 的用法，注意每一个case 必须要以breaksw 结尾　否则会继续执行下一个case 的命令(1) 另外，$< 的意思是取得使用者的stand input(2) echo 若加上-n 的选项，则游标会停留在该行最后echo -n "Input one color: "set STOPLIGHT = $<switch ($STOPLIGHT)case red:echo "red"breakswcase orange:echo "orange"breakswcase green:echo "green"breakswdefault:echo "you input $STOPLIGHT"endsw--------------------------------------------------------------------2. 利用set 来取得变数，set ABC = "I am ABC"也可以利用`command` 来取得命令且外，case 也可以用万用字元* 来代替set VER = `uname -r`switch ($VER)case 5.5:echo "run the setup of $VER"breakswcase 5.3:echo "run the setup of $VER"breakswcase 5.*:echo "like 5.x"breakswcase 4.*:echo "like 4.x"breakswdefault:echo "no idea"endsw--------------------------------------------------------------------3. if 的语法，比较数字set n1 = 1set n2 = 2if ($n1 == $n2) thenecho "$n1 Equal $n2"elseecho "$n1 Not Equal $n2"endif--------------------------------------------------------------------4. if 的语法，比较字串set n1 = abcdefset n2 = abcdeif ($n1 == $n2) thenecho "$n1 Equal $n2"elseecho "$n1 Not Equal $n2"endif--------------------------------------------------------------------5. if 的语法，比较相似的字串set n1 = abcdefset n2 = abcdeif ($n1 =~ $n2) thenecho "$n1 Like $n2"elseecho "$n1 Not Like $n2"endif--------------------------------------------------------------------6. if 的语法，比较数字的大小set n1 = 1set n2 = 2if ($n1 > $n2) thenecho "$n1 > $n2"elseendif--------------------------------------------------------------------7. 每分钟执行一次的程式# mm 等于当天时间的【分钟】数set mm = `date | cut -d' ' -f4 | cut -d: -f2`if ( -r $0.out ) thenrm $0.outtouch $0.outelsetouch $0.outendifwhile ( $mm <= 16 )set mm = `date | cut -d' ' -f4 | cut -d: -f2`echo "$mm now is `date`"sleep 60#echo "$mm now is `date`" >> $0.outendecho "Over" >> $0.out--------------------------------------------------------------------8. 一个回圈的范例，并且利用expr 去作加的动作回圈的语法如下：foreach number (1 2 3)echo $numberendset counter = 0while ($counter <= 10)echo "sleeping for 5 seconds"sleep 5counter = `expr $counter + 1 `end--------------------------------------------------------------------9. 设定一个用当天月份与日期作为档案名称的程式如今天是10/02 , 则$prefix 会等于该程式+ 1002set prefix = `basename $0``date '+ %m%d'`echo $0echo $prefix--------------------------------------------------------------------10. 移除在foreach 回圈内指定的档案内的font 字串foreach file ([b,e,g,h,s]*.html)echo -n "Processing $file, remove the line number `grep -n font $file`"# $log 表示这个$file 有几个font 字串set log = `grep -c font $file`if ( $log == '0' ) thenecho ", pass $file"else# 先找出该档案的第一次出现font 的行数，如果3，则$cmd = 3dset cmd = `grep -n font $file | cut -d: -f1 | head -1`d# 利用sed 去执行删除的动作，并把结果输出到${file}1sed $cmd $file > ${file}1# 如果${file}1 没有资料，则passingif ( -z ${file}1 ) thenecho " , ${file}1 is zero"elsecp ${file}1 $filerm {$file}1echo " , $file remove ok"endifendifend# 后来看过sed 的更进一步用法，发现先前写的太笨了，试试这个# sed /font/d $file > ${file}1# 一次OK, 我真是大笨蛋--------------------------------------------------------------------11. 功能：将指定的档案中，出现第一次【回】的那一行，加上<title> xxxx </title>foreach file (sky*.html)set filetitle = ftitle# 主要部份为sed 部份 s/^ *// 表示将该行第一个字元前的空白删除echo "<title>`grep 回$file | head -1 | sed -e 's/^ *//'`</title>" > $ftitle# 将刚刚那一行，再插回去head -1 $file > ${file}headsed 1d $file > ${file}1cat $ftitle >> ${file}headcat ${file}1 >> ${file}headcp ${file}head $filerm ${file}1rm $ftitlerm ${file}headecho "$file ok"end--------------------------------------------------------------------12. 一个实际建立一个ftp server 的程式 里面包括许多应用，相当有参考价值( 未完成)set path = ( /usr/bin /usr/sbin )#set true = `grep -c ftp /etc/passwd`if ( $true == 0 ) thenecho "no ftp user in your system"echo -n "do you want to create the ftp user? "set answer = $<if ($answer == 'y' || $answer == 'Y') thenset maxid = `sort /etc/passwd | tail -1 | cut -d: -f3`echo $maxidset newid = `expr $maxid + 1`echo $newidecho "/usr/sbin/useradd -d /home1/ftp -u $newid -s /etc/false ftp"endifelseecho "Good. Your system already has the ftp user. "set ftphome = `grep ftp: /etc/passwd | cut -d: -f6`echo $ftphomeendifif ( -z $ftphome ) thenecho "ftphome must be non-null"exit 2endifif ( $ftphome == "/usr" || $ftphome == "/" ) thenecho "ftphome can't be / or /usr"exit 2endif# create the ftp home directoryif ( ! -d $ftphome ) thenecho "mkdir $ftphome"endifecho "Setting up the ftphome for SunOS `uname -r`"if ( ! -d $ftphome ) thenecho "mkdir -p $ftphome/usr/bin"endifcp /bin/ls $ftphome/usr/binchmod 111 $ftphome/usr/bin/lschown root $ftphome/usr/binchmod 555 $ftphome/usr/binif ( -r $ftphome/bin ) thenmv -f $ftphome/bin $ftphome/Obinendifln -s usr/bin $ftphome--------------------------------------------------------------------13. 取得该使用者的UIDif ( $#argv == 0 ) thenecho "$0 usage: $1 username"exit 2endifset uid = `grep $1 /etc/passwd | cut -d: -f3`echo $uid--------------------------------------------------------------------14. 将指定档案内的html 取代成htmforeach file ( *.html )echo "Processing $file ..."sed s/html/htm/ $file > ${file}1cp ${file}1 $filerm ${file}1end--------------------------------------------------------------------15. 一个简简单单的范例，看看就好#!/bin/csh -fecho .................echo WELCOME to \* TAPE COPY \*echo .................echo Enter your name:# $< can read from stand inputset name = $<echo " "echo Hi $name \!set D = `date`echo Today\'s date is $D[1] $D[2] $D[3]if ($D[1] == Mon) thenecho -------------------------------------------------------------echo Today is $D[1]day $name, it\'s time to copy your directorys\! echo -------------------------------------------------------------elseecho -------------------------------------------------------------echo Today is $D[1]day $name, no tape copies today\!echo -------------------------------------------------------------endif--------------------------------------------------------------------16. 一个finger 的程式set FINGER = "/usr/ucb/finger"if ( -x $FINGER ) thenif ( $#argv == 0 ) thencat << TAG---------------------------------Hahahah ....---------------------------------TAGelse$FINGER "$*"endifelseecho "Cannot find finger on this system."endif--------------------------------------------------------------------17. 取得变数的方法set W = `who -r`echo $W[9]--------------------------------------------------------------------18. 更改档案名称，将*.html --> *.htm# rename *.html to *.htmecho -n "This will change *.html to *.htm. Can I continue ? (y/n) : " set input = $<if ( $input != "y" && $input != "Y" ) thenecho "Ok. Quit..."exit 2endifforeach file ( *.html )echo "Processing $file to `basename $file .html`.htm "mv $file `basename $file .html`.htmend--------------------------------------------------------------------19. 更改档案名称，将*.htm --> *.htmlecho -n "This will change *.htm to *.html. Can I continue ? (y/n) : " set input = $<if ( $input != "y" && $input != "Y" ) thenecho "Ok. Quit..."exit 2endif# rename *.htm to *.htmlforeach file ( *.htm )echo "Processing $file to `basename $file .htm`.html " mv $file `basename $file .htm`.htmlend--------------------------------------------------------------------20. 将大写的档名改成小写的档名tr string1 string2 会将standard input 的字串，所对应到的string1, 都以string2 取代foreach file ( * )mv $file `echo $file | tr '[A-Z]' '[a-z]'`end--------------------------------------------------------------------21. 将小写的档名改成大写的档名foreach file (*)mv $file `echo $file | tr '[a-z]' '[A-Z]'`end</P< p>。