如何在包含LF字符的Bash CLI中传递参数？类似于：myprog foo\nbar
我试过了：
myprog `printf 'foo\nbar'`
myprog foo\nbar
我使用这个bash程序来测试结果：
#myprog
echo $*
和node.js程序
#!/usr/bin/env node
console.log(process.argv[2])
它不起作用。
答案 0 :(得分：8)
在bash中使用ANSI C like strings，并使用$'...'表示法如下。当您想要将特殊字符作为参数传递给某些程序时，这尤其有用。
myProgram $'foo\nbar'
您可以看到形成的字符串的hexdump。不要混淆尾随的新行，因为它是由<<<
bash构造引入的
$ hexdump -c <<< $'foo\nbar'
0000000 f o o \n b a r \n
0000008
还支持以下转义序列，此处更新列表，因为它在重复列表中不可用。
+-------------+----------------------------------------------------------------------------------------------------------------------------------+
| code | meaning |
| | |
+-------------+----------------------------------------------------------------------------------------------------------------------------------+
| \" | double-quote |
| \' | single-quote |
| \\ | backslash |
| \a | terminal alert character (bell) |
| \b | backspace |
| \e | escape (ASCII 033) |
| \E | escape (ASCII 033) \E is non-standard |
| \f | form feed |
| \n | newline |
| \r | carriage return |
| \t | horizontal tab |
| \v | vertical tab |
| \cx | a control-x character, for example, $'\cZ' to print the control sequence composed of Ctrl-Z (^Z) |
| \uXXXX | Interprets XXXX as a hexadecimal number and prints the corresponding character from the character set (4 digits) (Bash 4.2-alpha)|
| \UXXXXXXXX | Interprets XXXX as a hexadecimal number and prints the corresponding character from the character set (8 digits) (Bash 4.2-alpha)|
| \nnn | the eight-bit character whose value is the octal value nnn (one to three digits) |
| \xHH | the eight-bit character whose value is the hexadecimal value HH (one or two hex digits) |
+-------------+----------------------------------------------------------------------------------------------------------------------------------+