参数重定向到一个程序（BASH） [英] Redirecting arguments into a program (BASH)

问题描述

我是相当新的bash脚本编程，我被困在是后一部分
    完成＆LT; $ file_input
我试图实现的是，当我运行程序./test内testfile的含
号码15 14 90 22，程序是要采取这些数字作为论据并运行它，但我不是很确定该怎么做。我在正确的方向前进？
感谢您的帮助。

 如果[$＃-ne 1]
然后
    writeusage
    出口
科幻
your_path = .. /文件/测试
test_path = .. / .. /公/测试
file_input =$ 1
而读-r线
做
   ARGS + =$行
完成＆LT; $ file_input
 

-----------------不确定如何在一个文本文件中的参数重定向到我的程序，然后把结果在一个文件名为correctanswer和他们差异比较

 ＃重定向输出到文件名为text
$ test_path＆GT; correctanswer 2  - ;＆放大器; 1
＃您重定向输出到文件名为文本2
$ your_path＆GT; youranswer 2  - ;＆放大器; 1
＃差异的解决方案
差异correctanswer youranswer
 

解决方案

您可以使用 $（小于文件）来读取一个文件到一个变量。使用它以后不带引号将导致内容为多个参数传递。

  your_path = .. /文件/测试
test_path = .. / .. /公/测试
file_input =$ 1
内容= $（小于$ file_input）$ test_path$内容＆gt; correctanswer 2  - ;＆放大器; 1
$ your_path$内容＆gt; youransweranswer 2  - ;＆放大器; 1差异correctanswer youranswer
 

这可以更简洁地使用进程替换写：

 差异≤（../../公共/测试$（小于$ 1））≤（../文件/测试$（小于$ 1 ））
 

I am fairly new to bash scripting and a part I am stuck on is after done< "$file_input" What I am trying to achieve is when I run the program ./test inside the testfile contains the numbers 15 14 90 22 and the program is going to take those numbers as the arguments and run it, but I am quite unsure how to do that. Am I going in the correct direction? Thanks for any help

if [[ "$#" -ne 1 ]]
then
    writeusage
    exit
fi
your_path=../file/test
test_path=../../public/test
file_input="$1"
while read -r line
do
   args+="$line"
done < "$file_input"

----------------- unsure how to redirect the arguments in a text file into my program and then put the result in a file named correctanswer and diff them

# Redirect the output to a file named text
$test_path > correctanswer 2>&1
# Redirect your output to a file named text2
$your_path > youranswer 2>&1   
# diff the solutions
diff correctanswer youranswer

解决方案

You can use $(< file) to read a file into a variable. Using it unquoted afterwards will cause the contents to be passed as multiple arguments.

your_path=../file/test
test_path=../../public/test
file_input="$1"
contents=$(< "$file_input")

"$test_path" $contents > correctanswer 2>&1
"$your_path" $contents > youransweranswer 2>&1

diff correctanswer youranswer

This can more succinctly be written using process substitution:

diff <(../../public/test $(< "$1")) <(../file/test $(< "$1"))

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