Linux ed Editor 一行 search/replaces

Question

我想用 Linux 中的 ed 编辑器在一行中对以下文件进行多次替换：

#device     device      mount       FS  fsck    mount   mount
#to mount   to fsck     point       type    pass    at boot options
#
#/dev/dsk/c0d0s2 /dev/rdsk/c0d0s2 /usr      ufs 1   yes -
fd  -   /dev/fd fd  -   no  -
/proc   -   /proc   proc    -   no  -
/dev/dsk/c0d0s3 -   -   swap    -   no  -
/dev/dsk/c0d0s0 /dev/rdsk/c0d0s0    /   ufs 1   no  -
/dev/dsk/c0d0s4 /dev/rdsk/c0d0s4    /usr    ufs 1   no  -
/dev/dsk/c0d0s1 /dev/rdsk/c0d0s1    /var    ufs 1   yes -
/dev/dsk/c0d0s7 /dev/rdsk/c0d0s7    /export ufs 2   yes -
/dev/dsk/c0d0s5 /dev/rdsk/c0d0s5    /usr/informix   ufs 2   yes -
swap    -   /tmp    tmpfs   -   yes -

我想把"c0"全部换成"c1"在/dev/ ..

这是我放入 ed 的正则表达式：1,$s/$\/dev.*$$c0$$d0s.*$/c1/g 结果是

   #device      device      mount       FS  fsck    mount   mount
    #to mount   to fsck     point       type    pass    at boot options
    #
    #/dev/dsk/c0d0s2 /dev/rdsk/c1d0s2 /usr      ufs 1   yes -
    fd  -   /dev/fd fd  -   no  -
    /proc   -   /proc   proc    -   no  -
    /dev/dsk/c1d0s3 -   -   swap    -   no  -
    /dev/dsk/c0d0s0 /dev/rdsk/c1d0s0    /   ufs 1   no  -
    /dev/dsk/c0d0s4 /dev/rdsk/c1d0s4    /usr    ufs 1   no  -
    /dev/dsk/c0d0s1 /dev/rdsk/c1d0s1    /var    ufs 1   yes -
    /dev/dsk/c0d0s7 /dev/rdsk/c1d0s7    /export ufs 2   yes -
    /dev/dsk/c0d0s5 /dev/rdsk/c1d0s5    /usr/informix   ufs 2   yes -
    swap    -   /tmp    tmpfs   -   yes -

然而，这个长正则表达式：
1,$s/$\/dev.*$$c0$$d0s.*$$\/dev.*$$c0$$d0s.*$/c1c1/g 结果是：

#device     device      mount       FS  fsck    mount   mount
#to mount   to fsck     point       type    pass    at boot options
#
#/dev/dsk/c1d0s2 /dev/rdsk/c1d0s2 /usr      ufs 1   yes -
fd  -   /dev/fd fd  -   no  -
/proc   -   /proc   proc    -   no  -
/dev/dsk/c0d0s3 -   -   swap    -   no  -
/dev/dsk/c1d0s0 /dev/rdsk/c1d0s0    /   ufs 1   no  -
/dev/dsk/c1d0s4 /dev/rdsk/c1d0s4    /usr    ufs 1   no  -
/dev/dsk/c1d0s1 /dev/rdsk/c1d0s1    /var    ufs 1   yes -
/dev/dsk/c1d0s7 /dev/rdsk/c1d0s7    /export ufs 2   yes -
/dev/dsk/c1d0s5 /dev/rdsk/c1d0s5    /usr/informix   ufs 2   yes -
swap    -   /tmp    tmpfs   -   yes -

保留第一个 "c0" 仍然是 "c0" 因为它没有被搜索字符串

所以我得到了一个文件，其中一行有多个搜索结果，但它只替换了一个实例。我知道 "global"-Flag 在文件的第一步运行并标记匹配的 line。我希望我知道是什么导致了这个问题，但我没有足够的 ed 经验来知道如何解决它。
为你加油干杯

Answer 1

您可以使用 g 命令搜索带有 dev 字符串的行，然后使用 s（替换）命令和 g（全局）进行全局替换标志：

g/\/dev/s/c0/c1/g

给你预期的结果：

#device     device      mount       FS  fsck    mount   mount
#to mount   to fsck     point       type    pass    at boot options
#
#/dev/dsk/c1d0s2 /dev/rdsk/c1d0s2 /usr      ufs 1   yes -
fd  -   /dev/fd fd  -   no  -
/proc   -   /proc   proc    -   no  -
/dev/dsk/c1d0s3 -   -   swap    -   no  -
/dev/dsk/c1d0s0 /dev/rdsk/c1d0s0    /   ufs 1   no  -
/dev/dsk/c1d0s4 /dev/rdsk/c1d0s4    /usr    ufs 1   no  -
/dev/dsk/c1d0s1 /dev/rdsk/c1d0s1    /var    ufs 1   yes -
/dev/dsk/c1d0s7 /dev/rdsk/c1d0s7    /export ufs 2   yes -
/dev/dsk/c1d0s5 /dev/rdsk/c1d0s5    /usr/informix   ufs 2   yes -
swap    -   /tmp    tmpfs   -   yes -

Linux ed Editor 一行 search/replaces

Linux ed Editor multiple search/replaces in one line

regex

search

replace

editor

ed