user/bk-copy-rand-music

   1 #!/usr/bin/env bash
   2 # Desc: Copies random audio files
   3 # Usage: bk-copy-rand-music [dir SOURCE] [dir DEST] [int DURATION] ([int BYTES])
   4 # Version: 0.2.0
   5 # Depends: BK-2020-03: bkshuf v0.1.0
   6
   7 declare -Ag appRollCall # Associative array for storing app status
   8 declare -Ag fileRollCall # Associative array for storing file status
   9 declare -Ag dirRollCall # Associative array for storing dir status
  10 declare -a music_codecs # Array for storing valid codec names (e.g. "aac" "mp3")
  11
  12 # Adjustable parameters
  13 music_codecs=("vorbis" "aac" "mp3" "flac" "opus"); # whitelist of valid codec_names ffprobe might return
  14 max_filename_length="255"; # max output filename length
  15 min_file_duration="10"; # minimum duration per music file
  16 max_file_duration="3600"; # maximum duration per music file
  17 min_file_size="100000"; # minimum size per music file (bytes)
  18 max_file_size="100000000"; # maximum size per music file (bytes)
  19 siz_dest="600000000"; # default destination size limit: 600 MB
  20 max_find_depth="10"; # max find depth
  21
  22 # Load env vars (bkshuf defaults for typical music albums)
  23 if [[ ! -v BKSHUF_PARAM_LINEC ]]; then export BKSHUF_PARAM_LINEC=1000000; fi;
  24 if [[ ! -v BKSHUF_PARAM_GSIZE ]]; then export BKSHUF_PARAM_GSIZE=10; fi;
  25
  26 yell() { echo "$0: $*" >&2; } # print script path and all args to stderr
  27 die() { yell "$*"; exit 111; } # same as yell() but non-zero exit status
  28 must() { "$@" || die "cannot $*"; } # runs args as command, reports args if command fails
  29 checkapp() {
  30     # Desc: If arg is a command, save result in assoc array 'appRollCall'
  31     # Usage: checkapp arg1 arg2 arg3 ...
  32     # Version: 0.1.1
  33     # Input: global assoc. array 'appRollCall'
  34     # Output: adds/updates key(value) to global assoc array 'appRollCall'
  35     # Depends: bash 5.0.3
  36     local returnState
  37
  38     #===Process Args===
  39     for arg in "$@"; do
  40         if command -v "$arg" 1>/dev/null 2>&1; then # Check if arg is a valid command
  41             appRollCall[$arg]="true";
  42             if ! [ "$returnState" = "false" ]; then returnState="true"; fi;
  43         else
  44             appRollCall[$arg]="false"; returnState="false";
  45         fi;
  46     done;
  47
  48     #===Determine function return code===
  49     if [ "$returnState" = "true" ]; then
  50         return 0;
  51     else
  52         return 1;
  53     fi;
  54 } # Check that app exists
  55 checkfile() {
  56     # Desc: If arg is a file path, save result in assoc array 'fileRollCall'
  57     # Usage: checkfile arg1 arg2 arg3 ...
  58     # Version: 0.1.1
  59     # Input: global assoc. array 'fileRollCall'
  60     # Output: adds/updates key(value) to global assoc array 'fileRollCall';
  61     # Output: returns 0 if app found, 1 otherwise
  62     # Depends: bash 5.0.3
  63     local returnState
  64
  65     #===Process Args===
  66     for arg in "$@"; do
  67         if [ -f "$arg" ]; then
  68             fileRollCall["$arg"]="true";
  69             if ! [ "$returnState" = "false" ]; then returnState="true"; fi;
  70         else
  71             fileRollCall["$arg"]="false"; returnState="false";
  72         fi;
  73     done;
  74
  75     #===Determine function return code===
  76     if [ "$returnState" = "true" ]; then
  77         return 0;
  78     else
  79         return 1;
  80     fi;
  81 } # Check that file exists
  82 checkdir() {
  83     # Desc: If arg is a dir path, save result in assoc array 'dirRollCall'
  84     # Usage: checkdir arg1 arg2 arg3 ...
  85     # Version 0.1.2
  86     # Input: global assoc. array 'dirRollCall'
  87     # Output: adds/updates key(value) to global assoc array 'dirRollCall';
  88     # Output: returns 0 if all args are dirs; 1 otherwise
  89     # Depends: Bash 5.0.3
  90     local returnState
  91
  92     #===Process Args===
  93     for arg in "$@"; do
  94         if [ -z "$arg" ]; then
  95             dirRollCall["(Unspecified Dirname(s))"]="false"; returnState="false";
  96         elif [ -d "$arg" ]; then
  97             dirRollCall["$arg"]="true";
  98             if ! [ "$returnState" = "false" ]; then returnState="true"; fi
  99         else
 100             dirRollCall["$arg"]="false"; returnState="false";
 101         fi
 102     done
 103
 104     #===Determine function return code===
 105     if [ "$returnState" = "true" ]; then
 106         return 0;
 107     else
 108         return 1;
 109     fi
 110 } # Check that dir exists
 111 displayMissing() {
 112     # Desc: Displays missing apps, files, and dirs
 113     # Usage: displayMissing
 114     # Version 1.0.0
 115     # Input: associative arrays: appRollCall, fileRollCall, dirRollCall
 116     # Output: stderr: messages indicating missing apps, file, or dirs
 117     # Output: returns exit code 0 if nothing missing; 1 otherwise
 118     # Depends: bash 5, checkAppFileDir()
 119     local missingApps value appMissing missingFiles fileMissing
 120     local missingDirs dirMissing
 121
 122     #==BEGIN Display errors==
 123     #===BEGIN Display Missing Apps===
 124     missingApps="Missing apps  :";
 125     #for key in "${!appRollCall[@]}"; do echo "DEBUG:$key => ${appRollCall[$key]}"; done
 126     for key in "${!appRollCall[@]}"; do
 127         value="${appRollCall[$key]}";
 128         if [ "$value" = "false" ]; then
 129             #echo "DEBUG:Missing apps: $key => $value";
 130             missingApps="$missingApps""$key ";
 131             appMissing="true";
 132         fi;
 133     done;
 134     if [ "$appMissing" = "true" ]; then  # Only indicate if an app is missing.
 135         echo "$missingApps" 1>&2;
 136     fi;
 137     unset value;
 138     #===END Display Missing Apps===
 139
 140     #===BEGIN Display Missing Files===
 141     missingFiles="Missing files:";
 142     #for key in "${!fileRollCall[@]}"; do echo "DEBUG:$key => ${fileRollCall[$key]}"; done
 143     for key in "${!fileRollCall[@]}"; do
 144         value="${fileRollCall[$key]}";
 145         if [ "$value" = "false" ]; then
 146             #echo "DEBUG:Missing files: $key => $value";
 147             missingFiles="$missingFiles""$key ";
 148             fileMissing="true";
 149         fi;
 150     done;
 151     if [ "$fileMissing" = "true" ]; then  # Only indicate if an app is missing.
 152         echo "$missingFiles" 1>&2;
 153     fi;
 154     unset value;
 155     #===END Display Missing Files===
 156
 157     #===BEGIN Display Missing Directories===
 158     missingDirs="Missing dirs:";
 159     #for key in "${!dirRollCall[@]}"; do echo "DEBUG:$key => ${dirRollCall[$key]}"; done
 160     for key in "${!dirRollCall[@]}"; do
 161         value="${dirRollCall[$key]}";
 162         if [ "$value" = "false" ]; then
 163             #echo "DEBUG:Missing dirs: $key => $value";
 164             missingDirs="$missingDirs""$key ";
 165             dirMissing="true";
 166         fi;
 167     done;
 168     if [ "$dirMissing" = "true" ]; then  # Only indicate if an dir is missing.
 169         echo "$missingDirs" 1>&2;
 170     fi;
 171     unset value;
 172     #===END Display Missing Directories===
 173
 174     #==END Display errors==
 175     #==BEGIN Determine function return code===
 176     if [ "$appMissing" == "true" ] || [ "$fileMissing" == "true" ] || [ "$dirMissing" == "true" ]; then
 177         return 1;
 178     else
 179         return 0;
 180     fi
 181     #==END Determine function return code===
 182 } # Display missing apps, files, dirs
 183 showUsage() {
 184     # Desc: Display script usage information
 185     # Usage: showUsage
 186     # Version 0.0.1
 187     # Input: none
 188     # Output: stdout
 189     # Depends: GNU-coreutils 8.30 (cat)
 190     cat <<'EOF'
 191
 192     DESCRIPTION:
 193       This script may be used to copy a random selection of files containing
 194       audio tracks from SOURCE to DEST.
 195
 196     USAGE:
 197       bk-copy-rand-music [dir SOURCE] [dir DEST] [int DURATION] (int BYTES)
 198
 199     EXAMPLE:
 200       bk-copy-rand-music ~/Music /tmp/music-sample 3600
 201       bk-copy-rand-music ~/Music /tmp/music-sample 3600 680000000
 202
 203     DEPENDENCIES:
 204       ffprobe
 205       GNU Coreutils 8.30
 206
 207     ENVIRONMENT VARIABLES
 208       BKSHUF_PARAM_LINEC (see `bkshuf` in BK-2020-03)
 209       BKSHUF_PARAM_GSIZE (see `bkshuf` in BK-2020-03)
 210 EOF
 211 } # Display information on how to use this script.
 212 check_parsable_audio_ffprobe() {
 213     # Desc: Checks if ffprobe returns valid audio codec name for file
 214     # Usage: check_parsable_audio_ffprobe [path FILE]
 215     # Version: 0.0.1
 216     # Input: arg1: file path
 217     # Output: exit code 0 if returns valid codec name; 1 otherwise
 218     # Depends: ffprobe, die()
 219     local file_in ffprobe_out
 220
 221     if [[ $# -ne 1 ]]; then die "ERROR:Invalid number of args:$#"; fi;
 222
 223     file_in="$1";
 224
 225     # Check if ffprobe detects an audio stream
 226     if ffprobe -v error -select_streams a -show_entries stream=codec_name -of default=nokey=1:noprint_wrappers=1 "$file_in" 1>/dev/null 2>&1; then
 227         return_state="true";
 228     else
 229         return_state="false";
 230     fi;
 231
 232     # Fail if ffprobe returns no result
 233     ffprobe_out="$(ffprobe -v error -select_streams a -show_entries stream=codec_name -of default=nokey=1:noprint_wrappers=1 "$file_in")";
 234     if [[ -z $ffprobe_out ]]; then
 235         return_state="false";
 236     fi;
 237
 238     # Report exit code
 239     if [[ $return_state = "true" ]]; then
 240         return 0;
 241     else
 242         return 1;
 243     fi;
 244 } # Checks if file has valid codec name using ffprobe
 245 get_audio_format() {
 246     # Desc: Gets audio format of file as string
 247     # Usage: get_audio_format arg1
 248     # Depends: ffprobe
 249     # Version: 0.0.1
 250     # Input: arg1: input file path
 251     # Output: stdout (if valid audio format)
 252     #         exit code 0 if audio file; 1 otherwise
 253     # Example: get_audio_format myvideo.mp4
 254     #   Note: Would return "opus" if full ffprobe report had 'Audio: opus, 48000 Hz, stereo, fltp'
 255     # Note: Not tested with videos containing multiple video streams
 256     # Ref/Attrib: [1] https://stackoverflow.com/questions/5618363/is-there-a-way-to-use-ffmpeg-to-determine-the-encoding-of-a-file-before-transcod
 257     #             [2] https://stackoverflow.com/questions/44123532/how-to-find-out-the-file-extension-for-extracting-audio-tracks-with-ffmpeg-and-p#comment88464070_50723126
 258     local audio_format file_in;
 259     local return_state;
 260     file_in="$1";
 261
 262     # Return error exit code if not audio file
 263     ## Return error if ffprobe itself exited on error
 264     if ! ffprobe -v error -select_streams a -show_entries stream=codec_name -of default=nokey=1:noprint_wrappers=1 "$file_in" 1>/dev/null 2>&1; then
 265         return_state="false";
 266     fi;
 267
 268     # Get audio format
 269     audio_format="$(ffprobe -v error -select_streams a -show_entries stream=codec_name -of default=nokey=1:noprint_wrappers=1 "$file_in")"; # see [1]
 270
 271     ## Return error if audio format is incorrectly formatted (e.g. reject if contains spaces)
 272     pattern="^[[:alnum:]]+$"; # alphanumeric string with no spaces
 273     if [[ $audio_format =~ $pattern ]]; then
 274         return_state="true";
 275         # Report audio format
 276         echo "$audio_format";
 277     else
 278         return_state="false";
 279     fi;
 280
 281     # Report exit code
 282     if [[ $return_state = "true" ]]; then
 283         return 0;
 284     else
 285         return 1;
 286     fi;
 287 } # Get audio format as stdout
 288 get_media_length() {
 289     # Use ffprobe to get media container length in seconds (float)
 290     # Usage: get_media_length arg1
 291     # Input:  arg1: path to file
 292     # Output: stdout: seconds (float)
 293     # Depends: ffprobe 4.1.8
 294     # Ref/Attrib: [1] How to get video duration in seconds? https://superuser.com/a/945604
 295     local file_in
 296     file_in="$1";
 297     if [[ ! -f $file_in ]]; then
 298         die "ERROR:Not a file:$file_in";
 299     fi;
 300     ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 "$file_in";
 301 } # Get media container length in seconds via stdout
 302 checkInt() {
 303     # Desc: Checks if arg is integer
 304     # Usage: checkInt arg
 305     # Input: arg: integer
 306     # Output: - return code 0 (if arg is integer)
 307     #         - return code 1 (if arg is not integer)
 308     # Example: if ! checkInt $arg; then echo "not int"; fi;
 309     # Version: 0.0.1
 310     local returnState
 311
 312     #===Process Arg===
 313     if [[ $# -ne 1 ]]; then
 314         die "ERROR:Invalid number of arguments:$#";
 315     fi;
 316
 317     RETEST1='^[0-9]+$'; # Regular Expression to test
 318     if [[ ! $1 =~ $RETEST1 ]] ; then
 319         returnState="false";
 320     else
 321         returnState="true";
 322     fi;
 323
 324     #===Determine function return code===
 325     if [ "$returnState" = "true" ]; then
 326         return 0;
 327     else
 328         return 1;
 329     fi;
 330 } # Checks if arg is integer
 331 checkIsInArray() {
 332     # Desc: Checks if input arg is element in array
 333     # Usage: checkIsInArray arg1 arg2
 334     # Version: 0.0.1
 335     # Input: arg1: test string
 336     #        arg2: array
 337     # Output: exit code 0 if test string is in array; 1 otherwise
 338     # Example: checkIsInArray "foo" "${myArray[@]}"
 339     # Ref/Attrib: [1] How do I check if variable is an array? https://stackoverflow.com/a/27254437
 340     #             [2] How to pass an array as function argument? https://askubuntu.com/a/674347
 341     local return_state input arg1 string_test
 342     declare -a arg2 array_test
 343     input=("$@") # See [2]
 344     arg1="${input[0]}";
 345     arg2=("${input[@]:1}");
 346     #yell "DEBUG:input:${input[@]}";
 347     #yell "DEBUG:arg1:${arg1[@]}";
 348     #yell "DEBUG:arg2:${arg2[@]}";
 349
 350     string_test="$arg1";
 351     array_test=("${arg2[@]}");
 352
 353     #yell "DEBUG:string_test:$string_test";
 354     #yell "DEBUG:$(declare -p array_test)";
 355     for element in "${array_test[@]}"; do
 356         #yell "DEBUG:element:$element";
 357         if [[ "$element" =~ ^"$string_test" ]]; then
 358             return_state="true";
 359             continue;
 360         fi;
 361     done;
 362
 363     # Report exit code
 364     if [[ $return_state == "true" ]]; then
 365         return 0;
 366     else
 367         return 1;
 368     fi;
 369 } # Check if string is element in array
 370 main() {
 371     # Desc: Main program
 372     # Input: arg1: path to source tree
 373     #        arg2: path to destination tree
 374     #        arg3: cumulative duration (seconds) of audio files in destination tree
 375     #        arg4: cumulative size (bytes) of audio files in destination tree (optional)
 376     #        assoc arrays: appRollCall, fileRollCall, dirRollCall
 377     #        env.var: BKSHUF_PARAM_LINEC (bkshuf)
 378     #                 BKSHUF_PARAM_GSIZE (bkshuf)
 379     #        arrays: music_codecs
 380     #        vars: max_filename_length, min_file_duration, max_file_duration,
 381     #                min_file_size, max_file_size, siz_dest, max_find_depth
 382     # Output: [none]
 383     # Depends: yell(), checkdir() 0.1.2, displayMissing() 1.0.0, GNU Coreutils 8.30
 384     #          BK-2020-03: bkshuf v0.1.0
 385     local arg1 arg2 arg3 dur_dest dir_source dir_dest
 386     declare -a list_files # array for files to be considered
 387     declare -a list_copy # array for files to be copied (string: "$dur,$fsize,$path")
 388
 389     # Parse args
 390     arg1="$1";
 391     arg2="$2";
 392     arg3="$3";
 393     arg4="$4";
 394     if ! { [[ $# -eq 3 ]] || [[ $# -eq 4 ]]; }; then
 395         showUsage;
 396         die "ERROR:Invalid number of args:$#"; fi;
 397
 398     # Check env vars
 399     if ! checkInt "$BKSHUF_PARAM_LINEC"; then
 400         die "FATAL:Not an int:BKSHUF_PARAM_LINEC:$BKSHUF_PARAM_LINEC"; fi;
 401     if ! checkInt "$BKSHUF_PARAM_GSIZE"; then
 402         die "FATAL:Not an int:BKSHUF_PARAM_LINEC:$BKSHUF_PARAM_GSIZE"; fi;
 403
 404     ## Check duration
 405     if checkInt "$arg3"; then
 406         dur_dest="$arg3";
 407     else
 408         die "FATAL:Duration (seconds) not an int:$arg3"
 409     fi;
 410
 411     ## Check size
 412     if [[ -n "$arg4" ]]; then
 413         if checkInt "$arg4"; then
 414             siz_dest="$arg4";
 415         else
 416             die "FATAL:Size (bytes) not an int:$arg4";
 417         fi;
 418     fi;
 419
 420     ## Check directories
 421     if checkdir "$arg1" "$arg2"; then
 422         dir_source="$arg1";
 423         dir_dest="$arg2";
 424     else
 425         yell "ERROR:Directory error";
 426     fi;
 427
 428     ## Check apps
 429     checkapp ffprobe bkshuf;
 430
 431     if ! displayMissing; then
 432         showUsage;
 433         die "ERROR:Check missing resources.";
 434     fi;
 435
 436     yell "STATUS:Working...";
 437
 438     # Populate list_files array
 439     while read -r line; do
 440         list_files+=("$line");
 441     done < <(find -L "$dir_source" -maxdepth "$max_find_depth" -type f | sort);
 442
 443     # Test and add random elements of list_files to list_copy
 444     dur=0; # Initialize duration
 445     siz=0; # Initialize size
 446     n=0; # Initialize loop counter
 447     dur_cand_w=1; # Init duration digit width counter
 448     siz_cand_w=1; # Init size digit width counter
 449     ## Get element count of list_files array
 450     file_count="${#list_files[@]}";
 451     while read -r line && \
 452             [[ $dur -le $dur_dest ]] && \
 453             [[ $siz -le $siz_dest ]] && \
 454             [[ $n -le $file_count ]]; do
 455         #yell "DEBUG:list_copy building loop:$n";
 456         path_candfile="$line"; # path of candidate file
 457
 458         ### Check if has valid codec
 459         if ! check_parsable_audio_ffprobe "$path_candfile"; then continue; fi; # reject
 460
 461         ### Check if desired codec
 462         file_format="$(get_audio_format "$path_candfile")";
 463         if ! checkIsInArray "$file_format" "${music_codecs[@]}"; then continue; fi; # reject
 464
 465         ### Check and save duration
 466         dur_cand="$(get_media_length "$path_candfile")";
 467         dur_cand="${dur_cand%%.*}"; # convert float to int
 468         if [[ "$((dur + dur_cand))" -gt "$dur_dest" ]]; then break; fi; # no more
 469         dur_cand_wnow="$(printf "%s" "$dur_cand" | wc -m)"; # duration width count
 470         if [[ $dur_cand_wnow -gt $dur_cand_w ]]; then
 471             dur_cand_w="$dur_cand_wnow"; fi;
 472         if ! checkInt "$dur_cand"; then continue; fi; # reject
 473         if [[ "$dur_cand" -lt "$min_file_duration" ]]; then continue; fi; # reject
 474         if [[ "$dur_cand" -gt "$max_file_duration" ]]; then continue; fi; # reject
 475
 476         ### Check and save size
 477         siz_cand="$(du -b "$path_candfile" | awk '{ print $1 }')"; # size in bytes
 478         if [[ "$((siz + siz_cand))" -gt "$siz_dest" ]]; then break; fi; # no more
 479         siz_cand_wnow="$(printf "%s" "$siz_cand" | wc -m)"; # size  width count
 480         if [[ $siz_cand_wnow -gt $siz_cand_w ]]; then
 481             siz_cand_w="$siz_cand_wnow"; fi;
 482         if ! checkInt "$siz_cand"; then continue; fi; # reject
 483         if [[ "$siz_cand" -lt "$min_file_size" ]]; then continue; fi; # reject
 484         if [[ "$siz_cand" -gt "$max_file_size" ]]; then continue; fi; # reject
 485
 486         ### Add/update candfile to array:
 487         ###   list_copy (array with "duration, size, path")
 488         #yell "DEBUG:Adding $path_candfile";
 489         #printf "DEBUG:%8d,%8d,%s\n" "$dur_cand" "$siz_cand" "$path_candfile" 1>&2;
 490         #printf "DEBUG:dur:%s\n" "$dur" 1>&2;
 491         #printf "DEBUG:siz:%s\n" "$siz" 1>&2;
 492         list_copy+=("$dur_cand,$siz_cand,$path_candfile"); # for copying with order
 493
 494         ### Update total duration $dur and total size $siz
 495         dur="$((dur + dur_cand))";
 496         siz="$((siz + siz_cand))";
 497         #yell "DEBUG:dur:$dur";
 498         #yell "DEBUG:siz:$siz";
 499
 500         ((n++));
 501     done < <(printf "%s\n" "${list_files[@]}" | bkshuf);
 502
 503     #yell "DEBUG:BKSHUF_PARAM_LINEC:$BKSHUF_PARAM_LINEC";
 504     #yell "DEBUG:BKSHUF_PARAM_GSIZE:$BKSHUF_PARAM_GSIZE";
 505
 506     n=0; # Initialize loop counter
 507     num_w="$(printf "%s" "${#list_copy[@]}" | wc -m)"; # init file number format
 508     num_fmt="%0""$num_w""d";
 509     path_log_output="$dir_dest"/COPY.log;
 510     printf "num,fingerprint,duration,size,original_path\n" >> "$path_log_output";
 511     # Copy files in list_copy to dir_dest;
 512     while read -r line; do
 513         #yell "DEBUG:line:$line"; # debug
 514         fdur="$(printf "%s" "$line" | cut -d',' -f1)";
 515         fsize="$(printf "%s" "$line" | cut -d',' -f2)";
 516         fpath="$(printf "%s" "$line" | cut -d',' -f3-)";
 517         ## Get basename of path
 518         file_basename="$(basename "$fpath")";
 519         ### Get basename without unprintable non-ASCII characters
 520         file_basename_compat="$(printf "%s" "$file_basename" | tr -dc '[:graph:][:space:]' )";
 521
 522         ## Get 16-character b2sum fingerprint (for different files that share basename)
 523         fingerprint="$(b2sum -l32 "$fpath" | awk '{print $1}' )";
 524
 525         ## Form output filename
 526         num="$(printf "$num_fmt" "$n")";
 527         file_name="$num"_"$fingerprint".."$file_basename_compat";
 528         file_name="${file_name:0:$max_filename_length}"; # Limit filename length (e.g. Windows has max of 255 characters)
 529
 530         ## Form output path
 531         path_output="$dir_dest"/"$file_name";
 532
 533         ## Copy
 534         must cp "$fpath" "$path_output" && yell "NOTICE:Copied ($fdur seconds): $fpath ";
 535         #yell "DEBUG:Copied $file_basename to $dur_dest.";
 536
 537         ## Append log
 538         fpath_can="$(readlink -f "$fpath")"; # resolve symlinks to canonical path
 539         log_fmt="%s,%s,%""$dur_cand_w""d,%""$siz_cand_w""d,%s\n"; # e.g. "%s,%3d,%5d,%s" if dur_cand_w=3 and siz_cand_w=5
 540         printf "$log_fmt" "$num" "$fingerprint" "$fdur" "$fsize" "$fpath_can" >> "$path_log_output";
 541
 542         ((n++));
 543         unset file_basename file_basename_compat path_output;
 544     done < <(printf "%s\n" "${list_copy[@]}");
 545
 546     # Report total duration and size
 547     yell "NOTICE:Total duration (seconds):$dur";
 548     yell "NOTICE:Total size (bytes):$siz";
 549
 550 } # Main program
 551
 552 main "$@";
 553
 554 # Author: Steven Baltakatei Sandoval
 555 # License: GPLv3+
 556
 557 # bkshuf v0.1.0
 558 #   Author: Steven Baltakatei Sandoval
 559 #   License: GPLv3+
 560 #   URL: https://gitlab.com/baltakatei/baltakatei-exdev/-/blob/b9e8b771e985fcdf26ba8b9ccb8e31b62da757d3/unitproc/bkshuf