Specific data formatting using awk or sed
Question
I am currently working with large datasets containing file information which is formatted into blocks of data. I am trying to take a piece of data from the file path line and append it as a new column on certain lines. The dataset contains file information formatted like so:
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/aab17eb15d782d7b/af38f2bcc4998af0/0d8eb680024af333.jar
Inode Num: 22525898
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
45:97:2a:60:e3:69 3208 10
7a:8b:8e:20:7b:38 1982 10
b9:45:3d:f4:97:88 1849 10
Whole File Hash: 865999b40fd9
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/1e82b13443330bb3/12fd3e87b2f62dc8/6e1a9f0b0a281564.c
Inode Num: 31881221
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
e8:b0:cb:6f:76:ff 1344 10
19:c5:b2:aa:b3:60 613 10
11:7c:7e:76:4b:d5 1272 10
36:e0:59:49:b6:4a 581 10
9c:31:bc:8a:39:94 3296 10
01:f0:56:3a:e1:a9 1140 10
Whole File Hash: 4b28b44ae03d
What I am wanting to do is take the file type (.jar and .c in this example) and append it to their respective Chunk Hash lines so the final formatting would look like:
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/aab17eb15d782d7b/af38f2bcc4998af0/0d8eb680024af333.jar
Inode Num: 22525898
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
45:97:2a:60:e3:69 3208 10 .jar
7a:8b:8e:20:7b:38 1982 10 .jar
b9:45:3d:f4:97:88 1849 10 .jar
Whole File Hash: 865999b40fd9
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/1e82b13443330bb3/12fd3e87b2f62dc8/6e1a9f0b0a281564.c
Inode Num: 31881221
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
e8:b0:cb:6f:76:ff 1344 10 .c
19:c5:b2:aa:b3:60 613 10 .c
11:7c:7e:76:4b:d5 1272 10 .c
36:e0:59:49:b6:4a 581 10 .c
9c:31:bc:8a:39:94 3296 10 .c
01:f0:56:3a:e1:a9 1140 10 .c
Whole File Hash: 4b28b44ae03d
I already have the awk code to pull the file type and the chunk hash lines:
awk 'match($0,/\..+/) {print substr($0,RSTART,RLENGTH)}'
awk '/Chunk Hash/{flag=1;next}/Whole File Hash:/{flag=0}flag'
I am just not sure on how to connect these pieces using awk (or sed) to append the file type as a new column onto each line in their respective data block. Another thing to note is I am trying to do this in a bash script if that makes a difference.
4 answers
solution1
2 2016-10-04 01:41:43
Solution in TXR language:
@(repeat)
@ (cases)
File path: @*path.@suff
Inode Num: @inode
@header
@ (collect)
@hashline
@ (last)
Whole File Hash: @wfh
@ (end)
@ (output)
File path: @path.@suff
Inode Num: @inode
@header
@ (repeat)
@{hashline 88}.@suff
@ (end)
Whole File Hash: @wfh
@ (end)
@ (or)
@other
@ (do (put-line other))
@ (end)
@(end)
Run:
$ txr suffixes.txr data
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/aab17eb15d782d7b/af38f2bcc4998af0/0d8eb680024af333.jar
Inode Num: 22525898
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
45:97:2a:60:e3:69 3208 10 .jar
7a:8b:8e:20:7b:38 1982 10 .jar
b9:45:3d:f4:97:88 1849 10 .jar
Whole File Hash: 865999b40fd9
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/1e82b13443330bb3/12fd3e87b2f62dc8/6e1a9f0b0a281564.c
Inode Num: 31881221
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
e8:b0:cb:6f:76:ff 1344 10 .c
19:c5:b2:aa:b3:60 613 10 .c
11:7c:7e:76:4b:d5 1272 10 .c
36:e0:59:49:b6:4a 581 10 .c
9c:31:bc:8a:39:94 3296 10 .c
01:f0:56:3a:e1:a9 1140 10 .c
Whole File Hash: 4b28b44ae03d
solution2
2 ACCPTED 2016-10-04 02:01:41
Here is a (GNU) sed solution:
/File path:/ { # If line matches "File path:"
h # Copy pattern space to hold space
s/.*(\.[^.]*)$/\1/ # Remove everything but extension from pattern space
x # Swap pattern space and hold space
} # Hold space now contains extension
/Chunk Hash/ { # If line matches "Chunk Hash"
n # Get next line into pattern space
:loop # Anchor for loop
/Whole File Hash/b # If line matches "Whole File Hash", jump out of loop
G # Append extension from hold space to pattern space
s/\n/\t\t\t\t/ # Substitute newline with a bunch of tabs
n # Get next line
b loop # Jump back to ":loop" label
}
This can be stored in a separate file (say, so.sed ), and has to be called like
sed -r -f so.sed infile
resulting in
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/aab17eb15d782d7b/af38f2bcc4998af0/0d8eb680024af333.jar
Inode Num: 22525898
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
45:97:2a:60:e3:69 3208 10 .jar
7a:8b:8e:20:7b:38 1982 10 .jar
b9:45:3d:f4:97:88 1849 10 .jar
Whole File Hash: 865999b40fd9
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/1e82b13443330bb3/12fd3e87b2f62dc8/6e1a9f0b0a281564.c
Inode Num: 31881221
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
e8:b0:cb:6f:76:ff 1344 10 .c
19:c5:b2:aa:b3:60 613 10 .c
11:7c:7e:76:4b:d5 1272 10 .c
36:e0:59:49:b6:4a 581 10 .c
9c:31:bc:8a:39:94 3296 10 .c
01:f0:56:3a:e1:a9 1140 10 .c
Whole File Hash: 4b28b44ae03d
Non-GNU seds have to jump through the usual hoops to insert tabs and can't use the -r option (but probably -E , which should be equivalent here; -r was just used for convenience to having to escape () ).
solution3
0 2016-10-04 04:54:35
In awk:
$ cat script.awk
/File path/ {
match($0,/\..+/)
ext=substr($0,RSTART,RLENGTH)
}
/Chunk Hash/ {
flag=1 # flag on
print # print here to...
next # avoid printing ext
}
/Whole File Hash:/ {
flag=0 # flag off
}
flag==1 {
print $0, ext # add space here to your liking, left it short...
next # ... to show output on screen without sidescrolling
} 1 # print non-flagged records
Run:
$ awk -f script.awk data.txt
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/aab17eb15d782d7b/af38f2bcc4998af0/0d8eb680024af333.jar
Inode Num: 22525898
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
45:97:2a:60:e3:69 3208 10 .jar
7a:8b:8e:20:7b:38 1982 10 .jar
b9:45:3d:f4:97:88 1849 10 .jar
Whole File Hash: 865999b40fd9
File path: /d9b50a6f54d5a1f8/7b3d459a3454703c/a6d1040ea2c84e10/afcbe93ced71e5e6/2b517a561f5da8a6/1e82b13443330bb3/12fd3e87b2f62dc8/6e1a9f0b0a281564.c
Inode Num: 31881221
Chunk Hash Chunk Size (bytes) Compression Ratio (tenth)
e8:b0:cb:6f:76:ff 1344 10 .c
19:c5:b2:aa:b3:60 613 10 .c
11:7c:7e:76:4b:d5 1272 10 .c
36:e0:59:49:b6:4a 581 10 .c
9c:31:bc:8a:39:94 3296 10 .c
01:f0:56:3a:e1:a9 1140 10 .c
Whole File Hash: 4b28b44ae03d
solution4
0 2016-10-04 12:15:51
awk --re-interval '
/^File/{ #If the beginning of line matches "File"
s=gensub("[^.]+(.*)","\\1","1",$0); #Gain the keywords like ".c,.jar" and assign them to s
}
/(..:){3,}/{ #If line matches "**:" three times or more
gsub("[0-9]+$","&\t\t\t\t\t" s,$0) #At the end add s
}
1' file #Print line
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