in my shell script i have the following line
在我的shell脚本中，我有以下行
PO_list=$(awk -v col="$1" -F";" '!seen[$col]++ {print $col}' test.csv)
which generates a list with the values from column "col" which came from "$1" from file test.csv. it might be possible to have several files in same location and for this would need to loop among them with a for sentence. For this I have to replace the filename test.csv with a variable, $i for example, which is the index from the list of files.
它生成一个列表，其中包含来自文件test.csv的“$ 1”列中的值“col”。也许有可能在同一个位置有几个文件，因此需要用句子循环它们。为此，我必须用变量$ i替换文件名test.csv，例如，这是文件列表中的索引。
trying to fulfill my request, I was modifying my line with
试图满足我的要求，我正在改变我的路线
PO_list=$(awk -v col="$1" -F";" '!seen[$col]++ {print $col}' $j)
unfortunately, i receive the error message:
不幸的是，我收到错误消息：
awk: cannot open test.csv (No such file or directory)
awk：无法打开test.csv（没有这样的文件或目录）
Can anyone tell me why this error occur and how can I solve it, please?
任何人都可以告诉我为什么会出现这种错误，我该如何解决呢？
Thank you,
谢谢，
1 个解决方案
#1
2
As you commented in your previous question, you are calling it with
正如您在上一个问题中所评论的那样，您正在调用它
abc$ ./test.sh 2
So you just need to add another parameter when you call it:
所以你只需要在调用它时添加另一个参数：
abc$ ./test.sh 2 "test.csv"
and the script can be like this:
并且脚本可以是这样的：
PO_list=$(awk -v col="$1" -F";" '!seen[$col]++ {print $col}' "$2")
# ^^^^
Whenever you want to use other parameters, remember they are positional. Hence, the first one is $1, second is $2 and so on.
每当您想使用其他参数时，请记住它们是位置的。因此，第一个是1美元，第二个是2美元，依此类推。
In case the file happens to be in another directory, you can replace ./test.sh 2 "test.csv" by something like ./test.sh 2 "/full/path/of/test.csv" or whatever relative path you may need.
如果文件碰巧在另一个目录中，你可以用./test.sh 2“/full/path/of/test.csv”或任何相对路径替换./test.sh 2“test.csv”你可能需要。
#1
2
As you commented in your previous question, you are calling it with
正如您在上一个问题中所评论的那样，您正在调用它
abc$ ./test.sh 2
So you just need to add another parameter when you call it:
所以你只需要在调用它时添加另一个参数：
abc$ ./test.sh 2 "test.csv"
and the script can be like this:
并且脚本可以是这样的：
PO_list=$(awk -v col="$1" -F";" '!seen[$col]++ {print $col}' "$2")
# ^^^^
Whenever you want to use other parameters, remember they are positional. Hence, the first one is $1, second is $2 and so on.
每当您想使用其他参数时，请记住它们是位置的。因此，第一个是1美元，第二个是2美元，依此类推。
In case the file happens to be in another directory, you can replace ./test.sh 2 "test.csv" by something like ./test.sh 2 "/full/path/of/test.csv" or whatever relative path you may need.
如果文件碰巧在另一个目录中，你可以用./test.sh 2“/full/path/of/test.csv”或任何相对路径替换./test.sh 2“test.csv”你可能需要。