一个shell的小疑惑
find "somedir" -type l -print0|xargs -r0 file|grep "broken symbolic"|sed -e 's/^\|: *broken symbolic.*$/"/g'
在此处 ”xargs -r0 file“ 做何解释？
“'s/^\|: *broken symbolic.*$/" ”----如何理解？？
[解决办法]
xargs 参数-0 说明传入字符串以null字符结尾, 空格, 引号 反斜扛不做特殊处理. 并传给file命令
后面那个sed是替换
[解决办法]
sed -e 's/^|: *broken symbolic.*$/"/g'
^从记录开头匹配 字符|: ( *)空格 *标识0个或者多个 字符broken symbolic
.*：.标识1个字符 .*标识所有字符 $记录尾 .*$标识匹配到记录尾所有字符 替换成"
这条应该不行吧，^标识从字符串开头匹配，而你现在这句要替换的并不在开头
#cat csdn_test
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf:broken symbolic link to `/usr/share/omf-langpack/gnome-bluetooth/gnome-bluetooth-ru.omf'
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf: broken symbolic link to `/usr/share/omf-langpack/gnome-bluetooth/gnome-bluetooth-ru.omf'
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf: broken symbolic link to `/usr/share/omf-langpack/gnome-bluetooth/gnome-bluetooth-ru.omf'
:broken symbolic link to `/usr/share/omf-langpack/gnome-bluetooth/gnome-bluetooth-ru.omf'
: broken symbolic link to `/usr/share/omf-langpack/gnome-bluetooth/gnome-bluetooth-ru.omf'
执行：
开头匹配，只替换后面的两条记录
#sed -e 's/^: *broken symbolic.*$/"/g' csdn_test
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf:broken symbolic link to `/usr/share/omf-langpack/gnome-bluetooth/gnome-bluetooth-ru.omf'
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf: broken symbolic link to `/usr/share/omf-langpack/gnome-bluetooth/gnome-bluetooth-ru.omf'
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf: broken symbolic link to `/usr/share/omf-langpack/gnome-bluetooth/gnome-bluetooth-ru.omf'
"
"
非开头匹配，替换所有记录
#sed -e 's/: *broken symbolic.*$/"/g' csdn_test
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf"
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf"
/usr/share/omf/gnome-bluetooth/gnome-bluetooth-ru.omf"
"
"
