☰

PS1 字符串完整文档和参考页面

tag-icon • tag-icon bash ps1
PS1 字符串完整文档和参考页面

经过几次挫折之后，我决定分享它，以便下次我不用参考我的笔记本，而是用谷歌搜索。

是否有一些关于 PS1 字符串接受值的权威文档？

  • 逃逸信件
  • 颜色
  • Unicode 字符

答案1

  1. https://man7.org/linux/man-pages/man1/bash.1.html#PROMPTING。只有一件事：这意味着每种颜色都应该以 开始\[并以 结束\]。
\a : an ASCII bell character (07)
\d : the date in “Weekday Month Date” format (e.g., “Tue May 26”)
\D{format} :    the format is passed to strftime(3) and the result is inserted into the prompt string; an empty format results in a locale-specific time representation. The braces are required
\e : an ASCII escape character (033)
\h : the hostname up to the first ‘.’
\H : the hostname
\j : the number of jobs currently managed by the shell
\l : the basename of the shell’s terminal device name
\n : newline
\r : carriage return
\s : the name of the shell, the basename of $0 (the portion following the final slash)
\t : the current time in 24-hour HH:MM:SS format
\T : the current time in 12-hour HH:MM:SS format
\@ : the current time in 12-hour am/pm format
\A : the current time in 24-hour HH:MM format
\u : the username of the current user
\v : the version of bash (e.g., 2.00)
\V : the release of bash, version + patch level (e.g., 2.00.0)
\w : the current working directory, with $HOME abbreviated with a tilde
\W : the basename of the current working directory, with $HOME abbreviated with a tilde
\! : the history number of this command
\# : the command number of this command
\$ : if the effective UID is 0, a #, otherwise a $
\nnn : the character corresponding to the octal number nnn
\\ : a backslash
\[ : begin a sequence of non-printing characters, which could be used to embed a terminal control sequence into the prompt
\] : end a sequence of non-printing characters
  1. 颜色
txtblk='\e[0;30m' # Black - Regular
txtred='\e[0;31m' # Red
txtgrn='\e[0;32m' # Green
txtylw='\e[0;33m' # Yellow
txtblu='\e[0;34m' # Blue
txtpur='\e[0;35m' # Purple
txtcyn='\e[0;36m' # Cyan
txtwht='\e[0;37m' # White
 
bldblk='\e[1;30m' # Black - Bold
bldred='\e[1;31m' # Red
bldgrn='\e[1;32m' # Green
bldylw='\e[1;33m' # Yellow
bldblu='\e[1;34m' # Blue
bldpur='\e[1;35m' # Purple
bldcyn='\e[1;36m' # Cyan
bldwht='\e[1;37m' # White
 
unkblk='\e[4;30m' # Black - Underline
undred='\e[4;31m' # Red
undgrn='\e[4;32m' # Green
undylw='\e[4;33m' # Yellow
undblu='\e[4;34m' # Blue
undpur='\e[4;35m' # Purple
undcyn='\e[4;36m' # Cyan
undwht='\e[4;37m' # White
 
bakblk='\e[40m'   # Black - Background
bakred='\e[41m'   # Red
badgrn='\e[42m'   # Green
bakylw='\e[43m'   # Yellow
bakblu='\e[44m'   # Blue
bakpur='\e[45m'   # Purple
bakcyn='\e[46m'   # Cyan
bakwht='\e[47m'   # White
 
txtrst='\e[0m'    # Text Reset
  1. Unicode 字符，我的发现：使用\x+hex_value，我们可以将 Unicode 字符添加到 PS1 字符串中。如何找出任何字符/字符串的 Unicode？使用echo <char> | hexdump -C。arg 可以是字符串。末尾的 代表一个新行。因为 bash 在行缓冲区的基础上工作；必须刷新才能知道这个字符串是否终止。如果要在提示字符串中插入任何字符，请删除除最后一个字符之外的0a所有字符（如果需要）。0a

例如：

echo 大 | hexdump -C
00000000  e5 a4 a7 0a                                       |....|
00000004

因此，您可以像这样在 ps 中插入字符：

export PS1='\xe5\xa4\xa7'

我发现，使用转换后的中文字符串，echo -e和printf都可以正常工作，输出中文字符，但在 中$PS1失败。因此，我不得不将命令echo -e string或 的值赋给一个变量printf string。

sentence=$(echo -e \xe5\xa4\xa7)
export PS1=$sentence

效果很好。

相关内容