dearvoid
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1#
发表于 2007-09-30 12:12
bash: 如何把提示符设成 $$
如果用 PS1='$$ ', 显示出来的是 shell 的 PID, 如果用 PS1='\$\$ ', 显示出来的是 ## (root 用户)
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dearvoid
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2#
发表于 2007-09-30 14:18
想出一个不是很 elegant 的方法
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代码:dollar='$'PS1='$dollar$dollar ' |
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li-jiahuan
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3#
发表于 2007-09-30 14:51
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代码:$$ id -u0 $$ echo $PS1 \\$$ 
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dearvoid
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4#
发表于 2007-09-30 15:16
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dearvoid
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5#
发表于 2007-09-30 15:40
诡异! 要把提示符设成 \\$$ 我们需要这样写:
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俺以为可以算是 bash 的 bug, 否则这样的用法能把人整晕 代码:PS1='\\\\\\\\\\$$'
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zhuomingliang
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6#
发表于 2007-09-30 18:02
引用:yykkk@vm-ubuntu-server001:~$ echo $PS1${debian_chroot:+($debian_chroot)}\u@\h:\w\$ yykkk@vm-ubuntu-server001:~$ $PS1 = '\$' -bash: ${debian_chroot:+($debian_chroot)}\u@\h:\w\$: command not found 
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li-jiahuan
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7#
发表于 2007-10-01 23:08
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dearvoid
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8#
发表于 2007-10-06 16:36
引用:原帖由 li-jiahuan 于 2007-10-1 23:08 发表$PS1 = '\$' 亮兄不会真打算执行这条命令吧
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dearvoid
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9#
发表于 2007-10-09 08:55
引用:原帖由 dearvoid 于 2007-9-30 15:40 发表诡异! 要把提示符设成 \\$$ 我们需要这样写: PS1='\\\\\\\\\\$$' 俺以为可以算是 bash 的 bug, 否则这样的用法能把人整晕
引用:"Clark J. Wang" <****@gmail.com> writes:> On 9/30/07, Andreas Schwab <schwab@suse.de> wrote: >> >> "Clark J. Wang" <****@gmail.com> writes: >> >> > Anybody has any idea? >> >> PS1='[\\$\\$=$$ \w] \$ ' > > > Sure it works but I don't think this is the way it should be. In this way, > to include `\\' in the prompt we have to write like this: > > $ PS1='\\\\\\\\' > > It's really hard to read and understand. Isn't it a bug? No. There are two levels of expansion, each using the same quote character (the backslash). You can disable the second level with `shopt -u promptvars', so that quote removal is not applied to the value. |