帮助处理 shell 脚本中的别名

发布于 2024-11-09 01:15:47 字数 913 浏览 0 评论 0原文

我有以下代码，旨在对某些输入运行 java 程序，并针对结果文件测试该输入以进行验证。

#!/bin/bash
java Program ../tests/test"$@".tst > test"$@".asm
spim -f test"$@".asm > temp
diff temp ../results/test"$@".out

上面代码的要点是：

在另一个目录中的测试文件上运行程序，并将输出通过管道传输到汇编文件中。
在该程序的输出上运行 MIPS 处理器，将其传输到名为 temp 的文件中。
对我生成的输出和一些预期输出运行 diff。

我制作了这个 shell 脚本来帮助我自动检查我的课堂作业。我不想再手动检查事情了。

我肯定做错了什么，因为虽然这个程序只处理一个参数，但处理多个参数时就会失败。如果我使用 $@，我得到的输出是：

./test.sh: line 2: test"$@".asm: ambiguous redirect
Cannot open file: `test0'

编辑：

啊，我想出来了。这段代码解决了这个问题：

#!/bin/bash
for arg in $@
do
java Parser ../tests/test"$arg".tst > test"$arg".asm
spim -f test"$arg".asm > temp
diff temp ../results/test"$arg".out
done

事实证明，每次我调用 $@ 时，bash 都必须解释不同的 cmd arg。

enter code here

原文

I have the following code, which is intended to run a java program on some input, and test that input against a results file for verification.

#!/bin/bash
java Program ../tests/test"$@".tst > test"$@".asm
spim -f test"$@".asm > temp
diff temp ../results/test"$@".out

The gist of the above code is to:

Run Program on a test file in another directory, and pipe the output into an assembly file.
Run a MIPS processor on that program's output, piping that into a file called temp.
Run diff on the output I generated and some expected output.

I made this shell script to help me automate checking of my homework assignment for class. I didn't feel like manually checking things anymore.

I must be doing something wrong, as although this program works with one argument, it fails with more than one. The output I get if I use the $@ is:

./test.sh: line 2: test"$@".asm: ambiguous redirect
Cannot open file: `test0'

EDIT:

Ah, I figured it out. This code fixed the problem:

#!/bin/bash
for arg in $@
do
java Parser ../tests/test"$arg".tst > test"$arg".asm
spim -f test"$arg".asm > temp
diff temp ../results/test"$arg".out
done

It turns out that bash must have interpreted a different cmd arg for each time I was invoking $@.