[SOLVED] sed using brackets to copy sth

zwiebelchen · 07-01-2012, 08:49 PM

Hi,

I have a file with lots of lines like

Quote:

else if (strncmp(input, "A1_ON", 5) == 0) { sendToUSB(dev_handle, 0); }
else if (strncmp(input, "A2_ON", 5) == 0) { sendToUSB(dev_handle, 0); }
else if (strncmp(input, "A3_ON", 5) == 0) { sendToUSB(dev_handle, 0); }

and I want to replace the last zero with the text between the "-Characers.

E.g.:

Quote:

else if (strncmp(input, "A1_ON", 5) == 0) { sendToUSB(dev_handle, 0); }

should become

Quote:

else if (strncmp(input, "A1_ON", 5) == 0) { sendToUSB(dev_handle, A1_ON); }

So, how to do ?

Thanks in advance,

zwiebelchen

dru8274 · 07-01-2012, 11:39 PM

Using sed...

Code:

$ cat >data1.dat <<EOF
else if (strncmp(input, "A1_ON", 5) == 0) { sendToUSB(dev_handle, 0); }
else if (strncmp(input, "A2_ON", 5) == 0) { sendToUSB(dev_handle, 0); }
else if (strncmp(input, "A3_ON", 5) == 0) { sendToUSB(dev_handle, 0); }
EOF

$ sed -n 's/^\([^"]\+"\)\([^"]\+\)\(",.\+dev_handle, \)0\().\+\)$/\1\2\3\2\4/p' data1.dat
else if (strncmp(input, "A1_ON", 5) == 0) { sendToUSB(dev_handle, A1_ON); }
else if (strncmp(input, "A2_ON", 5) == 0) { sendToUSB(dev_handle, A2_ON); }
else if (strncmp(input, "A3_ON", 5) == 0) { sendToUSB(dev_handle, A3_ON); }

Happy with solution ... mark as [SOLVED]

zwiebelchen · 07-02-2012, 04:24 AM

Thanks, worked great !

towheedm · 07-02-2012, 07:02 PM

I looked at this this question and thought about multiple back-references. I thought there may have been a simpler solution.