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当我打开终端时，/usr/share/bash-completion/bash-completion 出现源命令错误

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当我打开终端时，/usr/share/bash-completion/bash-completion 出现源命令错误

当我打开终端时出现以下错误：

bash: /usr/share/bash-completion/bash_completion: line 171: syntax error near unexpected token `}'
bash: /usr/share/bash-completion/bash_completion: line 171: `}'

这是由于该bash-completion文件的这个区域造成的：

_upvar()
{
    if unset -v "$1"; then           # Unset & validate varname
        if (( $# == 2 )); then
            eval $1=\"\$2\"          # Return single value
        else
            eval $1=\(\"\${@:2}\"\)  # Return array
        fi
    fi
}

为什么我会在那部分收到错误？

答案1

要查看您的别名是否与 bash 内置命令或系统命令冲突，请使用此脚本：

#!/bin/bash -i

# NAME: alias-check
# PATH: /mnt/e/bin
# DESC: Verify alias doesn't conflict with bash built-in
# DATE: June 17, 2018.

# Get aliases
alias > /tmp/alias.lst
sed -i 's/=.*//; s/alias //g' /tmp/alias.lst
#cat /tmp/alias.lst
while read -r line 
do 
   command type -a ${line}
done< /tmp/alias.lst

测试不好的别名

编辑~/.bashrc并插入这些“坏”别名：

alias fi=find
alias test='ls test'

现在运行脚本alias-check：

bash: /home/rick/.bashrc: line 171: syntax error: unexpected end of file
alert is aliased to `notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e 's/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//')"'
cdh is aliased to `cd /home/rick'
cdo is aliased to `cd /mnt/old'
cdt is aliased to `cd /usr/share/grub/themes/Tuxkiller2'

egrep is aliased to `egrep --color=auto'
egrep is /bin/egrep
fgrep is aliased to `fgrep --color=auto'
fgrep is /bin/fgrep
fi is aliased to `find'
fi is a shell keyword
grep is aliased to `grep --color=auto'
grep is /bin/grep
l is aliased to `ls -CF'
la is aliased to `ls -A'
ll is aliased to `ls -alF'
ls is aliased to `ls --color=auto'
ls is /bin/ls
lsdrv is aliased to `lsblk -o NAME,FSTYPE,LABEL,MOUNTPOINT,SIZE,MODEL'
redalert is aliased to `notify-send --urgency=critical -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e 's/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//')"'
sudo is aliased to `sudo '
sudo is /usr/bin/sudo
test is aliased to `ls test'
test is a shell builtin
test is /usr/bin/test
zenity is aliased to `zenity 2>/dev/null'
zenity is /mnt/e/usr/local/bin/zenity
zenity is /usr/local/bin/zenity
zenity is /usr/bin/zenity

请注意以下几行：

  • fi 是shell 关键字
  • 测试是一个shell 内置命令

在您的别名中查找这些类型的错误。

测试后，不要忘记删除别名fi并再次test保存~/.bashrc。

您不能通过在命令行上简单地发出别名来运行测试，因为脚本的第一行#!/bin/bash -i使用加载了新的 shell ~/.bashrc。

答案2

我认为这可能是同一个问题这篇 U&L 帖子：您有 的别名fi。大多数情况下，该脚本都很好，但是为 shell 关键字设置别名可能会导致意外问题：

$ alias fi=find
$ . /usr/share/bash-completion/bash_completion
bash: /usr/share/bash-completion/bash_completion: line 171: syntax error near unexpected token `}'
bash: /usr/share/bash-completion/bash_completion: line 171: `}'

尽管该函数位于第 170 行左右，但它是该文件中第一次使用 的地方fi。根据您放置此别名定义的确切位置以及 bash 确切获取 bash 完成脚本的位置，这可能是设置该别名后第一次fi使用。

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