+++ /dev/null
-#!/bin/bash
-
-# Desc: Template function to write data supplied as argument
-
-yell() { echo "$0: $*" >&2; } # Yell, Die, Try Three-Fingered Claw technique; # Ref/Attrib: https://stackoverflow.com/a/25515370
-die() { yell "$*"; exit 111; }
-try() { "$@" || die "cannot $*"; }
-appendArgTar(){
- # Desc: Writes first argument to temporary file with arguments as options, then appends file to tar
- # Usage: appendArgTar "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
- # Version: 1.0.6
- # Input: arg1: data to be written
- # arg2: file name of file to be inserted into tar
- # arg3: tar archive path (must exist first)
- # arg4: temporary working dir
- # arg5+: command strings (ex: "gpsbabel -i nmea -f - -o kml -F - ")
- # Output: file written to disk
- # Example: decrypt multiple large files in parallel
- # appendArgTar "$(cat /tmp/largefile1.gpg)" "largefile1" $HOME/archive.tar /tmp "gpg --decrypt" &
- # appendArgTar "$(cat /tmp/largefile2.gpg)" "largefile2" $HOME/archive.tar /tmp "gpg --decrypt" &
- # appendArgTar "$(cat /tmp/largefile3.gpg)" "largefile3" $HOME/archive.tar /tmp "gpg --decrypt" &
- # Depends: bash 5, tar 1, yell()
- # Ref/Attrib: Using 'eval' to construct command strings https://askubuntu.com/a/476533
-
- local fn fileName tarPath tmpDir cmd0 cmd1 cmd2 cmd3 cmd4
-
- # Save function name
- fn="${FUNCNAME[0]}";
- #yell "DEBUG:STATUS:$fn:Finished appendArgTar()."
-
- # Set file name
- if ! [ -z "$2" ]; then fileName="$2"; else yell "ERROR:$fn:Not enough arguments."; exit 1; fi
-
- # Check tar path is a file
- if [ -f "$3" ]; then tarPath="$3"; else yell "ERROR:$fn:Tar archive arg not a file."; exit 1; fi
-
- # Check temp dir arg
- if ! [ -z "$4" ]; then tmpDir="$4"; else yell "ERROR:$fn:No temporary working dir set."; exit 1; fi
-
- # Set command strings
- if ! [ -z "$5" ]; then cmd1="$5"; else cmd1="cat "; fi # command string 1
- if ! [ -z "$6" ]; then cmd2="$6"; else cmd2="cat "; fi # command string 2
- if ! [ -z "$7" ]; then cmd3="$7"; else cmd3="cat "; fi # command string 3
- if ! [ -z "$8" ]; then cmd4="$8"; else cmd4="cat "; fi # command string 4
-
- # Input command
- cmd0="echo \"\$1\""
-
- # # Debug
- # yell "DEBUG:STATUS:$fn:cmd0:$cmd0"
- # yell "DEBUG:STATUS:$fn:cmd1:$cmd1"
- # yell "DEBUG:STATUS:$fn:cmd2:$cmd2"
- # yell "DEBUG:STATUS:$fn:cmd3:$cmd3"
- # yell "DEBUG:STATUS:$fn:cmd4:$cmd4"
- # yell "DEBUG:STATUS:$fn:fileName:$fileName"
- # yell "DEBUG:STATUS:$fn:tarPath:$tarPath"
- # yell "DEBUG:STATUS:$fn:tmpDir:$tmpDir"
-
- # Write to temporary working dir
- eval "$cmd0 | $cmd1 | $cmd2 | $cmd3 | $cmd4" > "$tmpDir"/"$fileName";
-
- # Append to tar
- try tar --append --directory="$tmpDir" --file="$tarPath" "$fileName";
- #yell "DEBUG:STATUS:$fn:Finished appendArgTar()."
-} # Append Bash var to file appended to Tar archive
-
-#==BEGIN sample code==
-myTar="/tmp/$(date +%s).tar";
-myTmpDir="/dev/shm"
-try tar --create --file="$myTar" --files-from=/dev/null ;
-myVar="how are you doing?"
-appendArgTar "$myVar" "$(date +%s)..LOUD_insidetar" "$myTar" "$myTmpDir" "tee /tmp/$(date +%s)..outsidetar " "tr '[:lower:]' '[:upper:]'" && \
- echo "Created $myTar using $myTmpDir as temp working dir."
-#==END sample code==
-
-# Author: Steven Baltakatei Sandoval
-# License: GPLv3+