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A question about awk

A question about awk# Unix - 噫吁兮，危乎高哉

c*e2001-02-20 08:02

1 楼

用 awk 是不是只能读文件内容,而不能修改文件内容?
我用awk来实现把 backuptimes 加 1 的功能.我是这样写的:
awk '/backuptimes/{$2+=1;print}' logfile
print的结果是加 1 后的,但是文件的内容并没有改变,也就是没有加 1 .
难道awk不能改文件?

h*a2001-02-20 08:02

2 楼

ft, redirection >

【在 c********e 的大作中提到】

: 用 awk 是不是只能读文件内容,而不能修改文件内容?
: 我用awk来实现把 backuptimes 加 1 的功能.我是这样写的:
: awk '/backuptimes/{$2+=1;print}' logfile
: print的结果是加 1 后的,但是文件的内容并没有改变,也就是没有加 1 .
: 难道awk不能改文件?

c*e2001-02-20 08:02

3 楼

I'm not sure if redirection would work.
The logfile already exists, the > will not proceed. I can redirect to
a new file, remove the logfile, and rename the new file to logfile. But
I think it's not a good idea.
What's more,there are lots of other information in the logfile. I only
change the backuptimes. There is no need to redirect the whole file.
Thanks anyway.

【在 h******a 的大作中提到】

: ft, redirection >

m*u2001-02-20 08:02

4 楼

use sed then.

【在 c********e 的大作中提到】

: I'm not sure if redirection would work.
: The logfile already exists, the > will not proceed. I can redirect to
: a new file, remove the logfile, and rename the new file to logfile. But
: I think it's not a good idea.
: What's more,there are lots of other information in the logfile. I only
: change the backuptimes. There is no need to redirect the whole file.
: Thanks anyway.