本文介绍了阅读在bash文件时preserving前导空格的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
也许有人可以给我我的问题的线索。结果
让我们假设我有这样两行:
Maybe someone could give me a clue for my problem.
Let's suppose I have this two lines:
blablablabla
blablablabla
(第二行开始用空格)
(the second line begins with a space)
我试图测试在我行的第一个字符:
I tried to test the first character on my line:
while read line
do
check=${line:0:1}
done < file.txt
在这两种情况下,检查='B'
!这很烦人,因为我需要这些信息用于治疗的其余部分。
In both cases, check = 'b'
! That's annoying, because I need this information for the rest of the treatment.
推荐答案
您需要指定 IFS
空字符串,这样读
不丢弃开头或结尾空白:
You need to specify the empty string for IFS
so that read
doesn't discard leading or trailing whitespace:
while IFS= read line; do
check=${line:0:1}
done < file.txt
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