Commit | Line | Data |
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0f8ac166 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 $*"; } | |
8 | appendArgTar(){ | |
9 | # Desc: Writes first argument to temporary file with arguments as options, then appends file to tar | |
10 | # Usage: writeArg "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...) | |
11 | # Input: arg1: data to be written | |
12 | # arg2: file name of file to be inserted into tar | |
13 | # arg3: tar archive path (must exist first) | |
14 | # arg4: temporary working dir | |
15 | # arg5+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ") | |
16 | # Output: file written to disk | |
17 | # Example: decrypt multiple large files in parallel | |
18 | # appendArgTar "$(cat /tmp/largefile1.gpg)" "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" & | |
19 | # appendArgTar "$(cat /tmp/largefile2.gpg)" "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" & | |
20 | # appendArgTar "$(cat /tmp/largefile3.gpg)" "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" & | |
21 | ||
22 | # Depends: bash 5 | |
23 | ||
24 | # Set file name | |
25 | if ! [ -z "$2" ]; then FILENAME="$2"; else yell "ERROR:Not enough arguments."; exit 1; fi | |
26 | ||
27 | # Check tar path is a file | |
28 | if [ -f "$3" ]; then TAR_PATH="$3"; else yell "ERROR:Tar archive arg not a file."; exit 1; fi | |
29 | ||
30 | # Check temp dir arg | |
31 | if ! [ -z "$4" ]; then TMP_DIR="$3"; else yell "ERROR:No temporary working dir set."; exit 1; fi | |
32 | ||
33 | # Set command strings | |
34 | if ! [ -z "$5" ]; then CMD1="$5"; else CMD1="tee /dev/null "; fi # command string 1 | |
35 | if ! [ -z "$6" ]; then CMD2="$6"; else CMD2="tee /dev/null "; fi # command string 2 | |
36 | if ! [ -z "$7" ]; then CMD3="$7"; else CMD3="tee /dev/null "; fi # command string 3 | |
37 | if ! [ -z "$8" ]; then CMD4="$8"; else CMD4="tee /dev/null "; fi # command string 4 | |
38 | ||
39 | # Debug | |
40 | yell "CMD1:$CMD1" | |
41 | yell "CMD2:$CMD2" | |
42 | yell "CMD3:$CMD3" | |
43 | yell "CMD4:$CMD4" | |
44 | # Write to temporary working dir | |
45 | echo "$1" | $CMD1 | $CMD2 | $CMD3 | $CMD4 > "$TMP_DIR"/"$FILENAME"; | |
46 | ||
47 | # Append to tar | |
48 | try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME"; | |
49 | ||
50 | } # Append Bash var to file appended to Tar archive | |
51 | ||
52 | #==BEGIN sample code== | |
53 | myFile="/tmp/$(date +%s)..original" | |
54 | echo "how are you doing?" > "$myFile" | |
55 | myVAR="$(cat $myFile)" | |
56 | writeArg "$myVAR" "$myFile..LOUD_CHILD" "tee /tmp/cloneityclone " "tr '[:lower:]' '[:upper:]'" | |
57 | #==END sample code== | |
58 | ||
59 | # Author: Steven Baltakatei Sandoval | |
60 | # License: GPLv3+ |