Linux “$1/*”在“for file in $1/*”中是什么意思
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/8778017/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
What does "$1/*" mean in "for file in $1/*"
提问by louxiu
The short bash script below list all files and dirs in given directory and its sub. What does the $1/*mean in the script? Please give me some references about it. Thanks
下面的简短 bash 脚本列出了给定目录及其子目录中的所有文件和目录。$1/*脚本中的意思是什么？请给我一些关于它的参考。谢谢
#!/bin/sh
list_alldir(){
for file in /*
do
if [ -d $file ]; then
echo $file
list_alldir $file
else
echo $file
fi
done
}
if [ $# -gt 0 ]; then
list_alldir ""
else
list_alldir "."
fi
采纳答案by zellio
It's the glob of the first argument considered as a directory
这是被视为目录的第一个参数的 glob
In bash scripts the arguments to a file are passed into the script as $0( which is the script name ), then $1, $2, $3... To access all of them you either use their label or you use one of the group constructs. For group constructs there are $*and $@. ($*considers all of the arguments as one block where as $@considers them delimited by $IFS)
在 bash 脚本中，文件的参数作为$0（即脚本名称）传递到脚本中，然后$1, $2, $3... 要访问所有这些参数，您可以使用它们的标签或使用组结构之一。对于组结构，有$*和$@。（$*将所有参数视为一个块，其中 as$@认为它们由 分隔$IFS）
回答by Bohemian
$1means the first parameter.for file in $1/*means loop with the variable filehaving the value of the name of each file in the directory named in the first parameter.
$1表示第一个参数。for file in $1/*表示使用file具有第一个参数命名的目录中每个文件的名称值的变量进行循环。
回答by Rahul sawant
$1 is the first commandline argument. If you run ./asdf.sh a b c d e, then $1 will be a, $2 will be b, etc. In shells with functions, $1 may serve as the first function parameter, and so forth.
$1 是第一个命令行参数。如果您运行 ./asdf.sh abcde，则 $1 将是 a，$2 将是 b，等等。在带有函数的 shell 中，$1 可以作为第一个函数参数，依此类推。
