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f7df3da5 SBS |
1 | #!/bin/bash |
2 | ||
3 | # Desc: Template function to write data supplied as argument | |
4 | ||
5 | yell() { echo "$0: $*" >&2; } # Yell, Die, Try Three-Fingered Claw technique; # Ref/Attrib: https://stackoverflow.com/a/25515370 | |
6 | die() { yell "$*"; exit 111; } | |
7 | try() { "$@" || die "cannot $*"; } | |
8 | appendFileTar(){ | |
9 | # Desc: Processes first file and then appends to tar | |
10 | # Usage: appendFileTar [file path] [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...) | |
c1b629d0 | 11 | # Version: 1.0.3 |
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12 | # Input: arg1: path of file to be (processed and) written |
13 | # arg2: name to use for file inserted into tar | |
14 | # arg3: tar archive path (must exist first) | |
15 | # arg4: temporary working dir | |
16 | # arg5+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ") | |
17 | # Output: file written to disk | |
18 | # Example: decrypt multiple large files in parallel | |
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19 | # appendFileTar /tmp/largefile1.gpg "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" & |
20 | # appendFileTar /tmp/largefile2.gpg "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" & | |
21 | # appendFileTar /tmp/largefile3.gpg "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" & | |
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22 | # Depends: bash 5, tar 1, yell() |
23 | ||
24 | local fn fileName tarPath tmpDir | |
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25 | |
26 | # Save function name | |
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27 | fn="${FUNCNAME[0]}"; |
28 | #yell "DEBUG:STATUS:$fn:Finished appendFileTar()." | |
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29 | |
30 | # Set file name | |
c1b629d0 | 31 | if ! [ -z "$2" ]; then fileName="$2"; else yell "ERROR:$fn:Not enough arguments."; exit 1; fi |
f7df3da5 | 32 | # Check tar path is a file |
c1b629d0 | 33 | if [ -f "$3" ]; then tarPath="$3"; else yell "ERROR:$fn:Tar archive arg not a file:$3"; exit 1; fi |
f7df3da5 | 34 | # Check temp dir arg |
c1b629d0 | 35 | if ! [ -z "$4" ]; then tmpDir="$4"; else yell "ERROR:$fn:No temporary working dir set."; exit 1; fi |
f7df3da5 | 36 | # Set command strings |
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37 | if ! [ -z "$5" ]; then cmd1="$5"; else cmd1="cat "; fi # command string 1 |
38 | if ! [ -z "$6" ]; then cmd2="$6"; else cmd2="cat "; fi # command string 2 | |
39 | if ! [ -z "$7" ]; then cmd3="$7"; else cmd3="cat "; fi # command string 3 | |
40 | if ! [ -z "$8" ]; then cmd4="$8"; else cmd4="cat "; fi # command string 4 | |
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41 | |
42 | # Input command string | |
c1b629d0 | 43 | cmd0="cat \"\$1\"" |
b8b1e3a2 | 44 | |
f7df3da5 | 45 | # # Debug |
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46 | # yell "DEBUG:STATUS:$fn:cmd0:$cmd0" |
47 | # yell "DEBUG:STATUS:$fn:cmd1:$cmd1" | |
48 | # yell "DEBUG:STATUS:$fn:cmd2:$cmd2" | |
49 | # yell "DEBUG:STATUS:$fn:cmd3:$cmd3" | |
50 | # yell "DEBUG:STATUS:$fn:cmd4:$cmd4" | |
51 | # yell "DEBUG:STATUS:$fn:fileName:$fileName" | |
52 | # yell "DEBUG:STATUS:$fn:tarPath:$tarPath" | |
53 | # yell "DEBUG:STATUS:$fn:tmpDir:$tmpDir" | |
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54 | |
55 | # Write to temporary working dir | |
c1b629d0 | 56 | eval "$cmd0 | $cmd1 | $cmd2 | $cmd3 | $cmd4" > "$tmpDir"/"$fileName"; |
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57 | |
58 | # Append to tar | |
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59 | try tar --append --directory="$tmpDir" --file="$tarPath" "$fileName"; |
60 | #yell "DEBUG:STATUS:$fn:Finished appendFileTar()." | |
4bc2baeb | 61 | } # Append file to Tar archive |
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62 | |
63 | #==BEGIN sample code== | |
4bc2baeb | 64 | myTar="/tmp/$(date +%s).tar"; |
c1b629d0 | 65 | myTmpDir="/dev/shm"; |
4bc2baeb | 66 | try tar --create --file="$myTar" --files-from=/dev/null ; |
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67 | myFile="/tmp/$(date +%s)..original"; |
68 | echo "how are you doing?" > "$myFile"; | |
69 | appendFileTar "$myFile" "$(date +%s)..LOUD_insidetar" "$myTar" "$myTmpDir" "tee /tmp/$(date +%s)..outsidetar " "tr '[:lower:]' '[:upper:]'" && \ | |
70 | echo "Inserted a processed version of $myFile into $myTar using temp dir $myTmpDir "; | |
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71 | #==END sample code== |
72 | ||
73 | # Author: Steven Baltakatei Sandoval | |
74 | # License: GPLv3+ |