fix(bkgpslog):Use eval to build command strings

[EVA-2020-02.git] / exec / bkgpslog

diff --git a/exec/bkgpslog b/exec/bkgpslog
index 40faba29ddef50b906832cd3ca92a8d948cda2f4..63acc84eec246273b37da4924617dba3ed838fde 100755 (executable)
--- a/exec/bkgpslog
+++ b/exec/bkgpslog
@@ -14,7 +14,7 @@ DIR_TMP_DEFAULT="/dev/shm"; # Default parent of working directory
 SCRIPT_TIME_START=$(date +%Y%m%dT%H%M%S.%N);
 PATH="$HOME/.local/bin:$PATH";   # Add "$(systemd-path user-binaries)" path in case apps saved there
 SCRIPT_HOSTNAME=$(hostname);     # Save hostname of system running this script.
-SCRIPT_VERSION="0.3.5";          # Define version of script.
+SCRIPT_VERSION="0.3.7";          # Define version of script.
 SCRIPT_NAME="bkgpslog";          # Define basename of script file.
 SCRIPT_URL="https://gitlab.com/baltakatei/ninfacyzga-01"; # Define wesite hosting this script.
 AGE_VERSION="1.0.0-beta2";       # Define version of age (encryption program)
@@ -714,7 +714,7 @@ checkMakeTar() {
 appendArgTar(){
     # Desc: Writes first argument to temporary file with arguments as options, then appends file to tar
     # Usage: appendArgTar "$(echo "Data to be written.")" [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
-    # Version: 1.0.2
+    # Version: 1.0.3
     # Input: arg1: data to be written
     #        arg2: file name of file to be inserted into tar
     #        arg3: tar archive path (must exist first)
@@ -726,6 +726,7 @@ appendArgTar(){
     #          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
+    # Ref/Attrib: Using 'eval' to construct command strings https://askubuntu.com/a/476533
 
     # Save function name
     local FN="${FUNCNAME[0]}";
@@ -746,7 +747,11 @@ appendArgTar(){
     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
 
+    # 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"
@@ -756,7 +761,7 @@ appendArgTar(){
     # yell "DEBUG:STATUS:$FN:TMP_DIR:$TMP_DIR"
     
     # Write to temporary working dir
-    echo "$1" | $CMD1 | $CMD2 | $CMD3 | $CMD4 > "$TMP_DIR"/"$FILENAME";
+    eval "$CMD0"" | ""$CMD1"" | ""$CMD2"" | ""$CMD3"" | ""$CMD4" > "$TMP_DIR"/"$FILENAME";
 
     # Append to tar
     try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME";
@@ -765,7 +770,7 @@ appendArgTar(){
 appendFileTar(){
     # Desc: Processes first file and then appends to tar
     # Usage: appendFileTar [file path] [name of file to be inserted] [tar path] [temp dir] ([cmd1] [cmd2] [cmd3] [cmd4]...)
-    # Version: 1.0.1
+    # Version: 1.0.2
     # Input: arg1: path of file to be (processed and) written
     #        arg2: name to use for file inserted into tar
     #        arg3: tar archive path (must exist first)
@@ -793,7 +798,12 @@ appendFileTar(){
     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="$8"; else CMD4="tee /dev/null "; fi # command string 4
+
+    # Input command string
+    CMD0="cat \"\$1\""
+    
     # # Debug
+    # yell "DEBUG:STATUS:$FN:CMD0:$CMD0"
     # yell "DEBUG:STATUS:$FN:CMD1:$CMD1"
     # yell "DEBUG:STATUS:$FN:CMD2:$CMD2"
     # yell "DEBUG:STATUS:$FN:CMD3:$CMD3"
@@ -803,7 +813,7 @@ appendFileTar(){
     # yell "DEBUG:STATUS:$FN:TMP_DIR:$TMP_DIR"
     
     # Write to temporary working dir
-    cat "$1" | $CMD1 | $CMD2 | $CMD3 | $CMD4 > "$TMP_DIR"/"$FILENAME";
+    eval "$CMD0 | $CMD1 | $CMD2 | $CMD3 | $CMD4" > "$TMP_DIR"/"$FILENAME";
 
     # Append to tar
     try tar --append --directory="$TMP_DIR" --file="$TAR_PATH" "$FILENAME";
@@ -924,10 +934,10 @@ main() {
     if [[ "$OPTION_ENCRYPT" = "true" ]]; then # Check if encryption option active.
        if checkapp age; then # Check that age is available.
            for pubkey in "${recPubKeys[@]}"; do # Validate recipient pubkey strings by forming test message
-               vbm "DEBUG:Testing pubkey string:$pubkey"
+               vbm "DEBUG:Testing pubkey string:$pubkey";
                if echo "butts" | age -a -r "$pubkey" 1>/dev/null; then
                    #### Form age recipient string
-                   recipients="$recipients""-r $pubkey ";
+                   recipients="$recipients""-r '$pubkey' ";
                    vbm "STATUS:Added pubkey for forming age recipient string:""$pubkey";
                    vbm "DEBUG:recipients:""$recipients";
                    #### Add validated pubkey to recPubKeysValid array
@@ -939,26 +949,26 @@ main() {
            vbm "DEBUG:Finished processing recPubKeys array";
 
            ##  Form age command string
-           CMD_ENCRYPT="age ""$recipients ";
-           CMD_ENCRYPT_SUFFIX=".age";
+           CMD_ENCRYPT="age ""$recipients " && vbm "CMD_ENCRYPT:$CMD_ENCRYPT";
+           CMD_ENCRYPT_SUFFIX=".age" && vbm "CMD_ENCRYPT_SUFFIX:$CMD_ENCRYPT_SUFFIX";
        else
            yell "ERROR:Encryption enabled but \"age\" not found. Exiting."; exit 1;
        fi
     else
-       CMD_ENCRYPT="tee /dev/null ";
-       CMD_ENCRYPT_SUFFIX="";
+       CMD_ENCRYPT="tee /dev/null " && vbm "CMD_ENCRYPT:$CMD_ENCRYPT";
+       CMD_ENCRYPT_SUFFIX="" && vbm "CMD_ENCRYPT_SUFFIX:$CMD_ENCRYPT_SUFFIX";
        vbm "DEBUG:Encryption not enabled."
     fi
     if [[ "$OPTION_COMPRESS" = "true" ]]; then # Check if compression option active
        if checkapp gzip; then # Check if gzip available
-           CMD_COMPRESS="gzip ";
-           CMD_COMPRESS_SUFFIX=".gz";
+           CMD_COMPRESS="gzip " && vbm "CMD_COMPRESS:$CMD_COMPRESS";
+           CMD_COMPRESS_SUFFIX=".gz" && vbm "CMD_COMPRESS_SUFFIX:$CMD_COMPRESS_SUFFIX";
        else
            yell "ERROR:Compression enabled but \"gzip\" not found. Exiting."; exit 1;
        fi
     else
-       CMD_COMPRESS="tee /dev/null ";
-       CMD_COMPRESS_SUFFIX="";
+       CMD_COMPRESS="tee /dev/null " && vbm "CMD_COMPRESS:$CMD_COMPRESS";
+       CMD_COMPRESS_SUFFIX="" && vbm "CMD_COMPRESS_SUFFIX:$CMD_COMPRESS_SUFFIX";
        vbm "DEBUG:Compression not enabled.";
     fi
 
@@ -993,7 +1003,7 @@ main() {
     # MAIN LOOP:Record gps data until script lifespan ends
     while [[ "$SECONDS" -lt "$scriptTTL" ]]; do
        magicGatherWriteBuffer &
-       sleep "$BUFFER_TTL"
+       sleep "$BUFFER_TTL";
     done    
 
     # Cleanup