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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]...) | |
4bc2baeb | 11 | # Version: 1.0.1 |
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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" $HOME/archive.tar /tmp "gpg --decrypt" & | |
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22 | # Depends: bash 5 |
23 | ||
24 | # Save function name | |
25 | local FN="${FUNCNAME[0]}"; | |
4bc2baeb | 26 | #yell "DEBUG:STATUS:$FN:Finished appendFileTar()." |
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27 | |
28 | # Set file name | |
29 | if ! [ -z "$2" ]; then FILENAME="$2"; else yell "ERROR:$FN:Not enough arguments."; exit 1; fi | |
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30 | # Check tar path is a file |
31 | if [ -f "$3" ]; then TAR_PATH="$3"; else yell "ERROR:$FN:Tar archive arg not a file."; exit 1; fi | |
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32 | # Check temp dir arg |
33 | if ! [ -z "$4" ]; then TMP_DIR="$4"; else yell "ERROR:$FN:No temporary working dir set."; exit 1; fi | |
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34 | # Set command strings |
35 | if ! [ -z "$5" ]; then CMD1="$5"; else CMD1="tee /dev/null "; fi # command string 1 | |
36 | if ! [ -z "$6" ]; then CMD2="$6"; else CMD2="tee /dev/null "; fi # command string 2 | |
37 | if ! [ -z "$7" ]; then CMD3="$7"; else CMD3="tee /dev/null "; fi # command string 3 | |
38 | if ! [ -z "$8" ]; then CMD4="$8"; else CMD4="tee /dev/null "; fi # command string 4 | |
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39 | # # Debug |
40 | # yell "DEBUG:STATUS:$FN:CMD1:$CMD1" | |
41 | # yell "DEBUG:STATUS:$FN:CMD2:$CMD2" | |
42 | # yell "DEBUG:STATUS:$FN:CMD3:$CMD3" | |
43 | # yell "DEBUG:STATUS:$FN:CMD4:$CMD4" | |
44 | # yell "DEBUG:STATUS:$FN:FILENAME:$FILENAME" | |
45 | # yell "DEBUG:STATUS:$FN:TAR_PATH:$TAR_PATH" | |
46 | # yell "DEBUG:STATUS:$FN:TMP_DIR:$TMP_DIR" | |
47 | ||
48 | # Write to temporary working dir | |
49 | cat "$1" | $CMD1 | $CMD2 | $CMD3 | $CMD4 > "$TMP_DIR"/"$FILENAME"; | |
50 | ||
51 | # Append to tar | |
52 | try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME"; | |
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53 | #yell "DEBUG:STATUS:$FN:Finished appendFileTar()." |
54 | } # Append file to Tar archive | |
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55 | |
56 | #==BEGIN sample code== | |
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57 | myTar="/tmp/$(date +%s).tar"; |
58 | try tar --create --file="$myTar" --files-from=/dev/null ; | |
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59 | myFile="/tmp/$(date +%s)..original" |
60 | echo "how are you doing?" > "$myFile" | |
4bc2baeb | 61 | appendFileTar "$myFile" "$(date +%s)..LOUD_insidetar" "$myTar" "/dev/shm" "tee /tmp/$(date +%s)..outsidetar " "tr '[:lower:]' '[:upper:]'" |
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62 | #==END sample code== |
63 | ||
64 | # Author: Steven Baltakatei Sandoval | |
65 | # License: GPLv3+ |