From: Steven Baltakatei Sandoval Date: Thu, 2 Jul 2020 16:28:57 +0000 (+0000) Subject: feat(unitproc):Created appendArgTar: appends bashvar as file to tar X-Git-Tag: 0.2.0~12 X-Git-Url: https://zdv2.bktei.com/gitweb/BK-2020-03.git/commitdiff_plain/0f8ac166c15a51a2422eb2d2f34af8f7e82442fc?ds=sidebyside feat(unitproc):Created appendArgTar: appends bashvar as file to tar Created appendArgTar function which appends a provided bash variable to a specified tar archive using a specified temporary staging file directory. It does not create a tar and will exit if the write operation fails. --- diff --git a/unitproc/bktemp-appendArgTar b/unitproc/bktemp-appendArgTar new file mode 100644 index 0000000..b73f9b0 --- /dev/null +++ b/unitproc/bktemp-appendArgTar @@ -0,0 +1,60 @@ +#!/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 $*"; } +appendArgTar(){ + # Desc: Writes first argument to temporary file with arguments as options, then appends file to tar + # Usage: writeArg "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...) + # 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 + + # Set file name + if ! [ -z "$2" ]; then FILENAME="$2"; else yell "ERROR:Not enough arguments."; exit 1; fi + + # Check tar path is a file + if [ -f "$3" ]; then TAR_PATH="$3"; else yell "ERROR:Tar archive arg not a file."; exit 1; fi + + # Check temp dir arg + if ! [ -z "$4" ]; then TMP_DIR="$3"; else yell "ERROR:No temporary working dir set."; exit 1; fi + + # Set command strings + if ! [ -z "$5" ]; then CMD1="$5"; else CMD1="tee /dev/null "; fi # command string 1 + if ! [ -z "$6" ]; then CMD2="$6"; else CMD2="tee /dev/null "; fi # command string 2 + if ! [ -z "$7" ]; then CMD3="$7"; else CMD3="tee /dev/null "; fi # command string 3 + if ! [ -z "$8" ]; then CMD4="$8"; else CMD4="tee /dev/null "; fi # command string 4 + + # Debug + yell "CMD1:$CMD1" + yell "CMD2:$CMD2" + yell "CMD3:$CMD3" + yell "CMD4:$CMD4" + # Write to temporary working dir + echo "$1" | $CMD1 | $CMD2 | $CMD3 | $CMD4 > "$TMP_DIR"/"$FILENAME"; + + # Append to tar + try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME"; + +} # Append Bash var to file appended to Tar archive + +#==BEGIN sample code== +myFile="/tmp/$(date +%s)..original" +echo "how are you doing?" > "$myFile" +myVAR="$(cat $myFile)" +writeArg "$myVAR" "$myFile..LOUD_CHILD" "tee /tmp/cloneityclone " "tr '[:lower:]' '[:upper:]'" +#==END sample code== + +# Author: Steven Baltakatei Sandoval +# License: GPLv3+