How to take output of first sed and use it as second sed input

Question

<acdb_ids>
    <device name="SND_DEVICE_OUT_SPEAKER" acdb_id="15"/>
    <device name="SND_DEVICE_OUT_SPEAKER_REVERSE" acdb_id="15"/>
    <!-- add by lifei for A2DP Dirac audio effect 20170413-->
    <device name="SND_DEVICE_OUT_BT_A2DP" acdb_id="10"/>
    <!-- add by lifei end-->
    <device name="SND_DEVICE_OUT_SPEAKER_PROTECTED" acdb_id="124"/>
    <device name="SND_DEVICE_IN_VOICE_REC_QMIC_FLUENCE" acdb_id="131"/>
    <device name="SND_DEVICE_IN_VOICE_REC_TMIC" acdb_id="131"/>
    <device name="SND_DEVICE_IN_VOICE_REC_DMIC_FLUENCE" acdb_id="132"/>
    <device name="SND_DEVICE_OUT_VOICE_SPEAKER_2_PROTECTED" acdb_id="150"/>
    <device name="SND_DEVICE_OUT_VOICE_SPEAKER_2_PROTECTED_VBAT" acdb_id="150"/>
    <device name="SND_DEVICE_IN_CAPTURE_VI_FEEDBACK_MONO_1" acdb_id="151"/>
    <device name="SND_DEVICE_IN_CAPTURE_VI_FEEDBACK_MONO_2" acdb_id="152"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_USB_HEADSET_MIC" acdb_id="133"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_MIC" acdb_id="143"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_STEREO_MIC" acdb_id="144"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_THREE_MIC" acdb_id="145"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_QUAD_MIC" acdb_id="146"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_HEADSET_MIC" acdb_id="147"/>
    <!-- #ifdef VENDOR_EDIT -->
    <!-- aditya.gunda@Multimedia, 2019/10/16, EIDQ-5951, fix low volume issue -->
    <device name="SND_DEVICE_IN_HANDSET_MIC_REC_SINGLE" acdb_id="4"/>
    <!-- #endif -->
</acdb_ids>

<bit_width_configs>
        <device name="SND_DEVICE_OUT_SPEAKER_PROTECTED" bit_width="24"/>
</bit_width_configs>

These line are in audio_platform_info.xml, so what I want to do is read all device names from <acdb_ids> and append those onto <bit_width_configs>. Below represents the expected output after the script has been executed.

<acdb_ids>
    <device name="SND_DEVICE_OUT_SPEAKER" acdb_id="15"/>
    <device name="SND_DEVICE_OUT_SPEAKER_REVERSE" acdb_id="15"/>
    <!-- add by lifei for A2DP Dirac audio effect 20170413-->
    <device name="SND_DEVICE_OUT_BT_A2DP" acdb_id="10"/>
    <!-- add by lifei end-->
    <device name="SND_DEVICE_OUT_SPEAKER_PROTECTED" acdb_id="124"/>
    <device name="SND_DEVICE_IN_VOICE_REC_QMIC_FLUENCE" acdb_id="131"/>
    <device name="SND_DEVICE_IN_VOICE_REC_TMIC" acdb_id="131"/>
    <device name="SND_DEVICE_IN_VOICE_REC_DMIC_FLUENCE" acdb_id="132"/>
    <device name="SND_DEVICE_OUT_VOICE_SPEAKER_2_PROTECTED" acdb_id="150"/>
    <device name="SND_DEVICE_OUT_VOICE_SPEAKER_2_PROTECTED_VBAT" acdb_id="150"/>
    <device name="SND_DEVICE_IN_CAPTURE_VI_FEEDBACK_MONO_1" acdb_id="151"/>
    <device name="SND_DEVICE_IN_CAPTURE_VI_FEEDBACK_MONO_2" acdb_id="152"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_USB_HEADSET_MIC" acdb_id="133"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_MIC" acdb_id="143"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_STEREO_MIC" acdb_id="144"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_THREE_MIC" acdb_id="145"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_QUAD_MIC" acdb_id="146"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_HEADSET_MIC" acdb_id="147"/>
    <!-- #ifdef VENDOR_EDIT -->
    <!-- aditya.gunda@Multimedia, 2019/10/16, EIDQ-5951, fix low volume issue -->
    <device name="SND_DEVICE_IN_HANDSET_MIC_REC_SINGLE" acdb_id="4"/>
    <!-- #endif -->
</acdb_ids>

<bit_width_configs>
    <device name="SND_DEVICE_OUT_SPEAKER" bit_width="24"/>
    <device name="SND_DEVICE_OUT_SPEAKER_REVERSE" bit_width="24"/>
    <device name="SND_DEVICE_OUT_BT_A2DP" bit_width="24"/>
    <device name="SND_DEVICE_OUT_SPEAKER_PROTECTED" bit_width="24"/>
    <device name="SND_DEVICE_IN_VOICE_REC_QMIC_FLUENCE" bit_width="24"/>
    <device name="SND_DEVICE_IN_VOICE_REC_TMIC" bit_width="24"/>
    <device name="SND_DEVICE_IN_VOICE_REC_DMIC_FLUENCE" bit_width="24"/>
    <device name="SND_DEVICE_OUT_VOICE_SPEAKER_2_PROTECTED" bit_width="24"/>
    <device name="SND_DEVICE_OUT_VOICE_SPEAKER_2_PROTECTED_VBAT" bit_width="24"/>
    <device name="SND_DEVICE_IN_CAPTURE_VI_FEEDBACK_MONO_1" bit_width="24"/>
    <device name="SND_DEVICE_IN_CAPTURE_VI_FEEDBACK_MONO_2" bit_width="24"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_USB_HEADSET_MIC" bit_width="24"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_MIC" bit_width="24"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_STEREO_MIC" bit_width="24"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_THREE_MIC" bit_width="24"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_QUAD_MIC" bit_width="24"/>
    <device name="SND_DEVICE_IN_UNPROCESSED_HEADSET_MIC" bit_width="24"/>
    <device name="SND_DEVICE_IN_HANDSET_MIC_REC_SINGLE" bit_width="24"/>
</bit_width_configs>

So my question is how to append these output from first sed command to onto <bit_width_configs>.

[Don't Parse XML/HTML With Regex.](https://stackoverflow.com/a/1732454/3776858) I suggest to use an XML/HTML parser (xmlstarlet, xmllint ...). — Cyrus, Oct 23 '21 at 15:54

score 0 · Answer 1 · answered Oct 25 '21 at 10:53

This might work for you (GNU sed):

sed -En '/<acdb_ids>/{:a;n;/<device/{s/ acdb.*//;H};/<\/acdb_ids/!ba;H;x;x}
         /<bit_width_configs/!b;p;n
         s/.* //;G;:b;s/^([^\n]*)(.*)"\n/\1\2 \1\n/;tb
         s/^.*\n\n(.*)\n.*/\1/p;n;p;q' file

In overview: save the device information, print the opening tag of bit_width_configs, append the bit_width details to the detail lines, print them and the closing tag and quit.

Turn on extended regexps and off implicit printing -En.

Match opening acdb_ids tag and filter device info (less acdb_id tag) into the hold space.

Match opening bit_width_configs tag, print it.

Fetch the next line and append the details info.

Append the bit_width to each detail line.

Remove any artefacts and print all the details.

Fetch and print the closing bit_width_configs tag.

Quit processing.

Could you show before and after, I was unsure of the result you required? — potong, Oct 26 '21 at 15:33
gsed as I'm on mac so no gnu sed here ``` gsed -Ei.bak '//{:a;n;/ — Swarnim Lakra, Oct 26 '21 at 15:33
I've update the above query which should explain the given problem — Swarnim Lakra, Oct 26 '21 at 15:40

score 0 · Answer 2 · answered Oct 30 '21 at 11:16

sed -Ei '/<acdb_ids>/{:a;n;p;/<device/{s/ acdb.*//;H};/<\/acdb_ids/!ba;H;x;x}
     /<bit_width_configs/!b;n;p
     s/.* //;G;:b;s/^([^\n]*)(.*)"\n/\1\2" \1\n/;tb
     s/^.*\n\n(.*)\n.*/\1/p' audio_platform_info.xml
sed -Ei '/<bit_width_configs>/,/<\/bit_width_configs>/{G;/^([^\n]*). (\n.*)*\n\1(\n|$)/!{P;h};d}' audio_platform_info.xml
sed -i 's/<device name=".*"$/\
/g;/^$/!P;D;g' audio_platform_info.xml
sed -i '/^[[:space:]]*$/d' audio_platform_info.xml

For now this is my workaround for this problem, until me or somebody comes with a better solution. where, sed -Ei '/<bit_width_configs>/,/<\/bit_width_configs>/{G;/^([^\n]*)(\n.*)*\n\1(\n|$)/!{P;h};d}' audio_platform_info.xml weirds out due to sed being different in busybox.

You can include that information in the question using "edit" feature. It is better to not create answers for additional information — Amaimersion, Oct 30 '21 at 12:19

How to take output of first sed and use it as second sed input

2 Answers2