如何从命令行中的多行sed命令转到脚本中的单行

Question

I have sed running with the following argument fine if I copy and paste this into an open shell:

cat test.txt | sed '/[,0-9]\{0,\}[0-9]\{1,\}[acd][0-9]\{1,\}[,0-9]\{0,\}/{N
s/[,0-9]\{0,\}[0-9]\{1,\}[acd][0-9]\{1,\}[,0-9]\{0,\}\n\-\-\-//}'

The problem is that when I try to move this into a KornShell (ksh) script, the ksh throws errors because of what I think is that new line character. Can anyone give me a hand with this? FYI: the regular expression is supposed to be a multiple line replacement.

Thank you!

Answer 1

This: \\{0,\\} can be replaced by this: *

This: \\{1,\\} can be replaced by this: \\+

It's not necessary to escape hyphens.

The newline can be replaced by -e (or by a semicolon)

The cat can be replaced by using the filename as an argument to sed

The result:

sed -e '/[,0-9]*[0-9]\+[acd][0-9]\+[,0-9]*/{N' -e 's/[,0-9]*[0-9]\+[acd][0-9]\+[,0-9]*\n---//}' test.txt

or

sed '/[,0-9]*[0-9]\+[acd][0-9]\+[,0-9]*/{N;s/[,0-9]*[0-9]\+[acd][0-9]\+[,0-9]*\n---//}' test.txt

(untested)

Answer 2

您可以尝试将正则表达式放入文件中并使用-f选项调用sed吗？

cat test.txt | sed -f file.sed

Answer 3

您可以尝试用`echo -e \\\\ r`替换换行符吗？

Answer 4

The Korn Shell - unlike the C Shell - has no problem with newlines in strings. The newline is very unlikely to be your problem, therefore. The same comments apply to Bourne and POSIX shells, and to Bash. I've copied your example and run it on Linux under both Bash and Korn shell without any problem.

If you use C Shell for your work, are you sure you're running ' ksh ./script ' and not ' ./script '?

Otherwise, there is some other problem - an unbalanced quote somewhere, perhaps.

Check out the ' -v ' and ' -n ' options as well as the ' -x ' option to the Korn Shell. That may tell you more about where the problem is.