在bash中传递换行符(lf)/换行符作为参数

Passing line-feed(LF)/new-line character as an argument in bash

本问题已经有最佳答案，请猛点这里访问。

如何在包含lf字符的bash cli中传递参数？比如：myprog foo
bar。

我试过这个：

1
2
3
4

myprog `printf 'foo
bar'`
myprog foo
bar

我使用这个bash程序来测试结果：

1 2	#myprog echo $*

以及node.js程序

1 2	#!/usr/bin/env node console.log(process.argv[2])

它不起作用。

相关讨论

在bash中，使用类似于ansi c的字符串，其$'...'符号如下。当您想将特殊字符作为参数传递给某些程序时，这特别有用。

1 2	myProgram $'foo bar'

您可以看到形成的字符串的hexdump。不要混淆后面的新行，因为它是由bash中的here字符串<<<构造引入的。

1
2
3
4
5
6

$ hexdump -c <<< $'foo
bar'
0000000 f o o
b a r

0000008

以下转义序列也受支持，在这里更新列表，因为它在重复的序列中不可用。

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

+-------------+----------------------------------------------------------------------------------------------------------------------------------+
| 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 |
|
| newline |
|
| 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)|
|
nn | 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) |
+-------------+----------------------------------------------------------------------------------------------------------------------------------+