Thanks to everyone who posted here; it turns out it’s actually trivial to avoid special character file names, so I built my own script based on these here; Here's how it behaves with special character names:
$ ~/rndtree.sh ./rndpath 0 3 1 Warning: will create random tree at: ./rndpath Proceed (y/n)? y Removing old outdir ./rndpath mkdir -p ./rndpath/";"/{")?DxVBBJ{w2","L,|+","^VC)Vn.6!"}/"D+,IFJ( LN" > > > > > > > > > > > ./rndpath └── [ 4096] ; ├── [ 4096] )?DxVBBJ{w2 │ ├── [ 4096] D+,IFJ( LN │ │ └── [ 929] r2.bin │ ├── [ 8557] %3fsaG
and here with a safe subset of ASCII:
$ ~/rndtree.sh ./rndpath 1 3 1 Warning: will create random tree at: ./rndpath Proceed (y/n)? y Removing old outdir ./rndpath mkdir -p ./rndpath/"48SLS"/{"nyG","jIC6vj"}/{"PSLd5tMn","VR"} > > > > > > > ./rndpath ├── [ 4096] 48SLS │ ├── [ 4096] jIC6vj │ │ ├── [ 4096] PSLd5tMn │ │ ├── [ 4096] VR │ │ │ ├── [ 922] lg.bin │ │ │ └── [ 9600] VVYG.bin │ │ ├── [ 10883] B7nt06p.bin │ │ └── [ 19339] g5uT i.bin │ ├── [ 4096] nyG │ │ ├── [ 4096] PSLd5tMn │ │ └── [ 4096] VR │ │ └── [ 6128] 1tfLR.bin │ └── [ 5448] Jda.bin └── [ 18196] KwEXu2O2H9s.bin
Spaces should be handled in both cases - however, note that the subdirectory names are repeated (while the file names do not match).
script rndtree.sh :
#!/usr/bin/env bash # http://stackoverflow.com/questions/13400312/linux-create-random-directory-file-hierarchy # Decimal ASCII codes (see man ascii); added space AARR=( 32 {48..57} {65..90} {97..122} ) # Array count aarrcount=${#AARR[@]} if [ "$1" == "" ] ; then OUTDIR="./rndpath" ; else OUTDIR="$1" ; fi if [ "$2" != "" ] ; then ASCIIONLY="$2" ; else ASCIIONLY=1 ; fi if [ "$3" != "" ] ; then DIRDEPTH="$3" ; else DIRDEPTH=3 ; fi if [ "$4" != "" ] ; then MAXFIRSTLEVELDIRS="$4" ; else MAXFIRSTLEVELDIRS=2 ; fi if [ "$5" != "" ] ; then MAXDIRCHILDREN="$5" ; else MAXDIRCHILDREN=4 ; fi if [ "$6" != "" ] ; then MAXDIRNAMELEN="$6" ; else MAXDIRNAMELEN=12 ; fi if [ "$7" != "" ] ; then MAXFILECHILDREN="$7" ; else MAXFILECHILDREN=4 ; fi if [ "$8" != "" ] ; then MAXFILENAMELEN="$8" ; else MAXFILENAMELEN=20 ; fi if [ "$9" != "" ] ; then MAXFILESIZE="$9" ; else MAXFILESIZE=20000 ; fi MINDIRNAMELEN=1 MINFILENAMELEN=1 MINDIRCHILDREN=1 MINFILECHILDREN=0 MINFILESIZE=1 FILEEXT=".bin" VERBOSE=0 #1 get_rand_dirname() { if [ "$ASCIIONLY" == "1" ]; then for ((i=0; i<$((MINDIRNAMELEN+RANDOM%MAXDIRNAMELEN)); i++)) { printf \\$(printf '%03o' ${AARR[RANDOM%aarrcount]}); } else cat /dev/urandom | tr -dc '[ -~]' | tr -d '[$></~:`\\]' | head -c$((MINDIRNAMELEN + RANDOM % MAXDIRNAMELEN)) | sed 's/\(["]\)/\\\1/g' fi #echo -e " " # debug last dirname space } get_rand_filename() { if [ "$ASCIIONLY" == "1" ]; then for ((i=0; i<$((MINFILENAMELEN+RANDOM%MAXFILENAMELEN)); i++)) { printf \\$(printf '%03o' ${AARR[RANDOM%aarrcount]}); } else # no need to escape double quotes for filename cat /dev/urandom | tr -dc '[ -~]' | tr -d '[$></~:`\\]' | head -c$((MINFILENAMELEN + RANDOM % MAXFILENAMELEN)) #| sed 's/\(["]\)/\\\1/g' fi printf "%s" $FILEEXT } echo "Warning: will create random tree at: $OUTDIR" [ "$VERBOSE" == "1" ] && echo " MAXFIRSTLEVELDIRS $MAXFIRSTLEVELDIRS ASCIIONLY $ASCIIONLY DIRDEPTH $DIRDEPTH MAXDIRCHILDREN $MAXDIRCHILDREN MAXDIRNAMELEN $MAXDIRNAMELEN MAXFILECHILDREN $MAXFILECHILDREN MAXFILENAMELEN $MAXFILENAMELEN MAXFILESIZE $MAXFILESIZE" read -p "Proceed (y/n)? " READANS if [ "$READANS" != "y" ]; then exit fi if [ -d "$OUTDIR" ]; then echo "Removing old outdir $OUTDIR" rm -rf "$OUTDIR" fi mkdir "$OUTDIR" if [ $MAXFIRSTLEVELDIRS -gt 0 ]; then NUMFIRSTLEVELDIRS=$((1+RANDOM%MAXFIRSTLEVELDIRS)) else NUMFIRSTLEVELDIRS=0 fi # create directories for (( ifl=0;ifl<$((NUMFIRSTLEVELDIRS));ifl++ )) { FLDIR="$(get_rand_dirname)" FLCHILDREN=""; for (( ird=0;ird<$((DIRDEPTH-1));ird++ )) { DIRCHILDREN=""; MOREDC=0; for ((idc=0; idc<$((MINDIRCHILDREN+RANDOM%MAXDIRCHILDREN)); idc++)) { CDIR="$(get_rand_dirname)" ; # make sure comma is last, so brace expansion works even for 1 element? that can mess with expansion math, though if [ "$DIRCHILDREN" == "" ]; then DIRCHILDREN="\"$CDIR\"" ; else DIRCHILDREN="$DIRCHILDREN,\"$CDIR\"" ; MOREDC=1 ; fi } if [ "$MOREDC" == "1" ] ; then if [ "$FLCHILDREN" == "" ]; then FLCHILDREN="{$DIRCHILDREN}" ; else FLCHILDREN="$FLCHILDREN/{$DIRCHILDREN}" ; fi else if [ "$FLCHILDREN" == "" ]; then FLCHILDREN="$DIRCHILDREN" ; else FLCHILDREN="$FLCHILDREN/$DIRCHILDREN" ; fi fi } DIRCMD="mkdir -p $OUTDIR/\"$FLDIR\"/$FLCHILDREN" eval "$DIRCMD" echo "$DIRCMD" } # now loop through all directories, create random files inside # note printf '%q' escapes to preserve spaces; also here # escape, and don't wrap path parts in double quotes (eg | sed 's_/_"/"_g'); # note then we STILL have to eval to use it! # but now ls "$D" works, so noneed for QD # unfortunately backslashes can make '%q' barf - prevent them find "$OUTDIR" -type d | while IFS= read D ; do QD="$(printf '%q' "$(echo "$D")" )" ; [ "$VERBOSE" == "1" ] && echo "$D"; #echo "$QD"; ls -la "$D"; #eval "ls -la $QD"; for ((ifc=0; ifc<$((MINFILECHILDREN+RANDOM%MAXFILECHILDREN)); ifc++)) { CFILE="$(get_rand_filename)" ; echo -n '> ' [ "$VERBOSE" == "1" ] && echo "$D"/"$CFILE" cat /dev/urandom \ | head -c$((MINFILESIZE + RANDOM % MAXFILESIZE)) \ > "$D"/"$CFILE" } done echo tree -a --dirsfirst -s "$OUTDIR" echo "total bytes: $(du -bs $(echo "$OUTDIR"))"
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