1 00:00:02,310 --> 00:00:05,130 I would start with opening our script 2 00:00:09,710 --> 00:00:17,190 and we have already written what should happen with an extension specified by user is not found. 3 00:00:17,310 --> 00:00:26,040 So now in this part of code we know that user has specified some extension and we know that debt extension 4 00:00:26,250 --> 00:00:29,180 exists in a location directory. 5 00:00:30,030 --> 00:00:34,520 So we can now count the size of files of its specific extension. 6 00:00:34,800 --> 00:00:37,130 And if you practice it in the last lecture. 7 00:00:37,980 --> 00:00:40,570 So now we can write some command. 8 00:00:40,590 --> 00:00:48,830 What we are going to do come the size of files with specific extension 9 00:00:54,500 --> 00:01:00,680 so now pass output of ls l command for location variable 10 00:01:06,330 --> 00:01:10,560 so pass it into oxcart awk program 11 00:01:13,530 --> 00:01:22,410 and we will select only files that means that we will use only lines which starting with Desch and this 12 00:01:22,410 --> 00:01:25,260 output will pass into up come on 13 00:01:28,930 --> 00:01:34,450 and in that command we select the lines which ends with specific extension 14 00:01:38,800 --> 00:01:44,370 and this output will help into another awk program. 15 00:01:52,350 --> 00:02:04,230 And in the main section of that old program will count some. 16 00:02:04,440 --> 00:02:13,900 So we can now create variable sum which will be incremented for each record by fifth field 17 00:02:16,890 --> 00:02:23,250 but thats not all because we want to also know what is the largest and smallest file. 18 00:02:23,310 --> 00:02:29,780 So we need to define variables min and max out to do that. 19 00:02:29,880 --> 00:02:37,380 It would be good for first time for first record set into variables min and max value of fifth column 20 00:02:37,620 --> 00:02:46,400 of the record and then for another record for another line we would compare a fifth on that value of 21 00:02:46,410 --> 00:02:48,210 variable min and max. 22 00:02:48,210 --> 00:02:49,760 So lets do that. 23 00:02:50,340 --> 00:03:03,960 So for first record when a number of record is equal to 1 we can set a minimum to be value of Fifield 24 00:03:05,490 --> 00:03:16,920 maximum Will we also value of Fifield and we can set value of nine field which is file name into variable 25 00:03:16,990 --> 00:03:17,670 middle name 26 00:03:21,510 --> 00:03:22,690 and the same. 27 00:03:22,710 --> 00:03:29,650 We will do also for Max name. 28 00:03:29,820 --> 00:03:33,780 So now the initial setting is done and we can compare 29 00:03:37,010 --> 00:03:47,340 if value of Fifield is greater than value of variable mocs we will assign new value to variable Max 30 00:03:47,620 --> 00:03:49,080 as value is bigger 31 00:04:00,900 --> 00:04:06,020 and also V-Star new value into variable Max name 32 00:04:13,190 --> 00:04:16,150 and now we can do the same 33 00:04:19,230 --> 00:04:30,380 for case when in summary court will be value of field less then value of mean variable. 34 00:04:30,450 --> 00:04:43,020 So in that case mean a variable will have to that variable assign value of Fifield and to variable name 35 00:04:43,110 --> 00:04:50,080 Leavell assign value of nine field. 36 00:04:50,670 --> 00:04:56,790 And we have basically finished Main awk section which is done for all our records. 37 00:04:56,790 --> 00:05:05,470 In our case for each line of our command where are displayed only files of specific extension but we 38 00:05:05,470 --> 00:05:10,910 should also bring to user what is the actual disk size of those files. 39 00:05:10,930 --> 00:05:17,290 So in the end section when everything is counted we can print some 40 00:05:21,370 --> 00:05:28,060 sold us government print and print the actual song 41 00:05:38,520 --> 00:05:42,020 and we can display it in megabytes. 42 00:05:42,600 --> 00:05:47,220 So due to division by one thousand twenty four two times 43 00:05:52,050 --> 00:06:00,830 and we can also print how many files with specific extension is present using number of records of variable 44 00:06:02,290 --> 00:06:17,080 so right files and news variable and our present number of records and that's all we go line by line 45 00:06:17,260 --> 00:06:24,370 and checking if Fifield of each line is greater than maximum or if it is less than the minimum. 46 00:06:24,370 --> 00:06:30,380 And if yes we are setting a new values to variables min and max at the end. 47 00:06:30,610 --> 00:06:38,520 We are printing what is the actual sum and how many files of it specific extension are present. 48 00:06:39,280 --> 00:06:47,320 We can save the script and run it specify some location and some existing extension 49 00:06:55,030 --> 00:06:56,340 and it is working. 50 00:06:56,370 --> 00:06:57,460 The actual size. 51 00:06:57,490 --> 00:07:04,590 And how many files of its specific extension is present in that specified directory great. 52 00:07:04,810 --> 00:07:07,980 Now we use some not existing extension. 53 00:07:08,020 --> 00:07:08,790 Good. 54 00:07:08,920 --> 00:07:12,350 We see that no file with the set extension was found. 55 00:07:12,400 --> 00:07:13,640 It is working well. 56 00:07:13,840 --> 00:07:19,540 But if we don't specify any extension we don't see any sum for a specified directory. 57 00:07:19,670 --> 00:07:27,220 And also we don't have the logic for printing statistics so we need to fix it all in the next election.