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原帖由 arnina 于 2008-7-24 14:52 发表 ![]()
不生效，:t;N;s/\n//;b t
是在干什么？
看看sed的基础吧，N，标签，
info sed:
`N'
Add a newline to the pattern space, then append the next line of
input to the pattern space. If there is no more input then `sed'
exits without processing any more commands.
`: LABEL'
[No addresses allowed.]
Specify the location of LABEL for branch commands. In all other
respects, a no-op.
`b LABEL'
Unconditionally branch to LABEL. The LABEL may be omitted, in
which case the next cycle is started.
`t LABEL'
Branch to LABEL only if there has been a successful `s'ubstitution
since the last input line was read or conditional branch was taken.
The LABEL may be omitted, in which case the next cycle is started. |
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发表于 2008-07-24 14:06
