我在这里用这些变量做错了什么？

Question

我试图根据我在某些页面编号上找到的字符串将ptftk分割为tempfile.pdf。那些pagenumbers在tempfile中。

n=0 
prefix1="startpoint" 
prefix2="stoppoint" 
while read p; do 
    echo $p > temp 
    `cat temp` = prefix1$n 
    echo $((p-1)) > temp 
    `cat temp` = prefix2$n 
    n=$((n+1)); 
done < tempfile 

pdftk tempfile.pdf cat $startpoint0-$stoppoint1 output $1/01-0.pdf 
pdftk tempfile.pdf cat $startpoint1-$stoppoint2 output $1/02-0.pdf 
pdftk tempfile.pdf cat $startpoint2-end output $1/03-0.pdf 

出于某种原因，我得到这样的错误：

/usr/local/bin/skapa_digital_akt: rad 16: 1: kommandot finns inte 
/usr/local/bin/skapa_digital_akt: rad 18: 0: kommandot finns inte 
/usr/local/bin/skapa_digital_akt: rad 16: 6: kommandot finns inte 
/usr/local/bin/skapa_digital_akt: rad 18: 5: kommandot finns inte 
/usr/local/bin/skapa_digital_akt: rad 16: 13: kommandot finns inte 
/usr/local/bin/skapa_digital_akt: rad 18: 12: kommandot finns inte 
Error: Unexpected range end; expected a page 
    number or legal keyword, here: 
    Exiting. 
Errors encountered. No output created. 
Done. Input errors, so no output created. 
Error: Unexpected range end; expected a page 
    number or legal keyword, here: 
    Exiting. 
Errors encountered. No output created. 
Done. Input errors, so no output created. 
Error: Input page numbers include 0 (zero) 
    The first PDF page is 1 (one) 
    Exiting. 
Errors encountered. No output created. 
Done. Input errors, so no output created. 

显然变量起始点/ stoppoint设置错误。任何人都可以帮助我？

非常感谢！

/保罗

Answer 1

什么是

`cat temp` = prefix1$n 

该怎么办？您应该知道：它从temp中读取命令行并执行它。

如果临时包含1（和n为== 0）一条线，那么执行的命令是：

1 = prefix10 

你经常可以帮助自己对剧本的顶部插入set -x或调用它调试脚本使用sh -x yourscript.sh

Answer 2

这工作：

n=0 
while read p; do 
    echo $p > tempA$n 
    echo $((p-1)) > tempB$n 
    n=$((n+1)); 
done < tempfile 

startpoint0=$(cat tempA0) 
stoppoint1=$(cat tempB1) 
startpoint1=$(cat tempA1) 
stoppoint2=$(cat tempB2) 
startpoint2=$(cat tempA2) 


pdftk tempfile.pdf cat $startpoint0-$stoppoint1 output $1/01-0.pdf 
pdftk tempfile.pdf cat $startpoint1-$stoppoint2 output $1/02-0.pdf 
pdftk tempfile.pdf cat $startpoint2-end output $1/03-0.pdf