Shell Programming and Scripting

Code:

cat file
Bringing up loopback interface:  ^[[60G[^[[0;32m  OK  ^[[0;39m]^M^M¬
 19 Bringing up interface eth0:  ^[[60G[^[[0;32m  OK  ^[[0;39m]^M^M¬
 20 Starting portreserve: ^[[60G[^[[0;32m  OK  ^[[0;39m]^M^M¬
 21 Starting system logger: ^[[60G[^[[0;32m  OK  ^[[0;39m]^M^M¬
 22 Starting irqbalance: ^[[60G[^[[0;32m  OK  ^[[0;39m]^M^M¬

Code:

awk '{gsub(/\^M|\^\[\[[0-9]*G\[|\^\[\[0;[0-9]*m]*| *¬/,x)}1' file
Bringing up loopback interface:    OK
 19 Bringing up interface eth0:    OK
 20 Starting portreserve:   OK
 21 Starting system logger:   OK
 22 Starting irqbalance:   OK

This is copy and past from code in post #1. It may be that it has changed when you posted it here. Upload the file.

I just did, waiting for the moderator to approve

Try this, just to remove the escape codes.

Code:

awk '{gsub(/\^\[\[[0-9]*;*[0-9]*(G\[|m]*)/,x)}1' file

Either I'm doing something really wrong but in my test here the file remains the same thing. But I did the test of pasting the file content into another file and then it works.

Probably once you get the file I uploaded you'll be able to see what is going on

Please show exactly what you do. awk is not like dos2unix -- it won't modify the original file...

Code:

awk '{gsub(/\^\[\[[0-9]*;*[0-9]*(G\[|m]*)/,x)}1' boottest.log > boottest_awk.log

This is the content of the boottest_awk.log file:
I'll post a png file of what is seen from within vi:

In this posting, all appearances of the string <ESC> is a visual representation of the escape control character and <NUMBER> is a string of 1 or more decimal digits.

I'm not sure what the escape sequence:

Code:

<ESC>%G

is supposed to do, but the following script removes them. The escape sequences of the form:

Code:

<ESC>[<NUMBER>;<NUMBER>m

change the background or foreground color (only the foreground color is affected by your sample file). The following script removes them. The escape sequence:

Code:

<ESC>[60G

moves the cursor to output column 60 before printing the following text. A much more complicated script could evaluate what has already been output and match this behavior. The following simple script just removes them.

And, as requested, this script removes all carriage return control characters from the file:

Code:

CR=$(printf "\r")
ESC=$(printf "\e")
sed "s/$ESC\[[^Gm]*[Gm]//g;s/$ESC%G//g;s/$CR//g" boottest.log

If you weren't aware that there were escape control characters in your file, look at it using:

Code:

od -bc boottest.log

Assuming you're on a machine where ASCII is a subset of the code set underlying your current locale, the escape character will appear as the string 033.