How and What should I read/study to can resolve this script?

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How and What should I read/study to can resolve this script?

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05-18-2016

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How and What should I read/study to can resolve this script?

Hello everyone,

I am a newbie on the world Shell Script. I just can build some scripts basically with the command which I used on the terminal. With the part algorithmic I don't have problem, but some functionality I can't and didn't know how around the situation.

I have the file .txt with more a less 800 000 lines with this structure:

Code:

 . └── raiz  1 directory 
. ├── [ 16K]  ./raiz │   
├── [ 12K]  ./raiz/tgdf │   │ 
  ├── [6.0K]  ./raiz/tgdf/a_fazer │   │
   ├── [7.5K]  ./raiz/tgdf/a_fazer_5 │   │
   ├── [7.9M]  ./raiz/tgdf/analise_.pdf │   │   
├── [241K]  ./raiz/tgdf/141.pdf │   │  
 ├── [ 18M]  ./raiz/tgdf/Aulas.pdf ....

Which I need to do?

Create an array with called "values";
Read the file .txt and import the data on each line (all line) for to index the array called "values";
The array called "values" will have another array, called "info_line";
In the index, about array called "info_line", will be placed which was after last slash "/";
The value this last array, "info_line", will receive which be between characters [...] - e.g. 6.0K;

Basically I new create a multidimensionally array.
The part which I don't know is "read the lines inside the file .txt" - collect exactly line by line. Collect the value which be after last slash "/".

I appreciate the guidance about how and what I should read an study for I can do this functionality. I have been reading about regular express, I think this is very useful to do this kind of jobs, am I correct?

I apologize about my level English, but if I can't explained the problem please tell me which I will try to explain the best I could. Thanks

enodev

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05-18-2016

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Not the easiest spec to understand. It might help to add the desired result or output, e.g. the multidimensional array and how it is populated.

And, it seems those thingies at line end are not pipe chars, but character graphics' vertical lines?

Last edited by RudiC; 05-18-2016 at 06:57 PM..

RudiC

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05-18-2016

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Is this a homework assignment? Homework and coursework questions can only be posted in the Homework & Coursework forum under special homework rules.

Don Cragun

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Hello,

RudiC, please tell me if this example explain and it serves you understand.

This is my file .txt:

Code:

.
└── raiz_

1 directory
.
├── [ 16K]  ./prfw_
│   ├── [ 12K]  ./prfw_/C0
│   │   ├── [ 98K]  ./prfw_/dfs/index.html
│   │   ├── [6.0K]  ./prfw_/dfs/a_asdf
│   │   ├── [7.5K]  ./prfw_/dfs/a_asfd_5
│   │   ├── [7.9M]  ./prfw_/dfs/asdfsaf.pdf
│   │   ├── [241K]  ./prfw_/dfs/asfasfsdc.pdf
│   │   ├── [ 18M]  ./prfw_/dfs/sdf dsf.pdf
│   │   ├── [ 116]  ./prfw_/dfs/backup.txt
.....continue until 180 000 lines

And I need this result, after run the algorithmic:

Code:

values=    [│   │   ├── [ 98K]  ./prfw_/dfs/index.html]
        [info_line=[index.html][98K]]
values=    [│   │   ├── [6.0K]  ./prfw_/dfs/a_asdf]
        [info_line=[a_asdf][6.0K]]

Don Cragun, this request don't will be the homework. I need this to management the files on the disk!

Thanks

enodev

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05-18-2016

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I'm still not quite sure what you request. But, mayhap this script (needs a recent bash; unfortunately you don't mention your OS nor shell version) comes close to what you want:

Code:

while read LINE
  do    IFS="][/" read -a ARR <<< $LINE
        echo $LINE
        echo ${ARR[1]} ${ARR[$((${#ARR[@]}-1))]}
  done <file
.
.
└── raiz_
└── raiz_

bash: ARR: bad array subscript

1 directory
1 directory
.
.
├── [ 16K] ./prfw_
16K prfw_
│ ├── [ 12K] ./prfw_/C0
12K C0
│ │ ├── [ 98K] ./prfw_/dfs/index.html
98K index.html
│ │ ├── [6.0K] ./prfw_/dfs/a_asdf
6.0K a_asdf
│ │ ├── [7.5K] ./prfw_/dfs/a_asfd_5
7.5K a_asfd_5
│ │ ├── [7.9M] ./prfw_/dfs/asdfsaf.pdf
7.9M asdfsaf.pdf
│ │ ├── [241K] ./prfw_/dfs/asfasfsdc.pdf
241K asfasfsdc.pdf
│ │ ├── [ 18M] ./prfw_/dfs/sdf dsf.pdf
18M sdf dsf.pdf
│ │ ├── [ 116] ./prfw_/dfs/backup.txt
116 backup.txt

As you can see, it has its weaknesses (e.g. for single item lines), and no error checking, but it may point you in the right direction...

Last edited by RudiC; 05-18-2016 at 07:12 PM.. Reason: typo

RudiC

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05-18-2016

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Well, it's difficult to say what to read and study in this case. Regexes were not used at all in above. As it was done in pure shell, man bash is the document to read, and to exercise. Read these fora to learn how to use it (and other tools) and to pick up the tricks.

RudiC

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