sed问题

aiwujixian

add_overlayfiles() {
        local file="$1"
        find /overlay/etc/ -type f | sed \
                -e 's,^/overlay/,/,' \
                -e '\,/META_[a-zA-Z0-9]*$,d' \         // ?这一句是删除什么东西，没有看懂
                -e '\,/functions.sh$,d' \
                -e '\,/[^/]*-opkg$,d' \
        > "$file"
        return 0
}

jason680

META_[a-zA-Z0-9]*$

.... META_
.... META_test123
.... META_123
.... META_A2b3c

elu_ligao

回复 2# jason680


    请问这个是以 ,  做为分隔吗， 还有META 前面那个 / 是不是也算在匹配模式里的

jason680

回复 3# elu_ligao

sorry, forgot the /

$ man sed
....

       /regexp/
              Match lines matching the regular expression regexp.

       \cregexpc
              Match lines matching the regular expression regexp.  The  c  may
              be any character.

   
------------------------------------

\,/META_[a-zA-Z0-9]*$,d  ==>   \,xxxx,  and d for delete

$ cat FILE
.... /META_
.... META_test123
.... /META_123
.... META_A2b3c

$ sed -e '\,/META_[a-zA-Z0-9]*$,d' FILE
.... META_test123
.... META_A2b3c

elu_ligao

回复 4# jason680


    thanks， 明白了， man 手册从来没有认真的看过， 非常感谢， 还指明了出处

moperyblue

info sed

1. 
   
2. `\%REGEXP%'
   
3.      (The `%' may be replaced by any other single character.)
   
4. 
   
5.      This also matches the regular expression REGEXP, but allows one to
   
6.      use a different delimiter than `/'.  This is particularly useful
   
7.      if the REGEXP itself contains a lot of slashes, since it avoids
   
8.      the tedious escaping of every `/'.  If REGEXP itself includes any
   
9.      delimiter characters, each must be escaped by a backslash (`\').

复制代码