From 9ac77d42d1c2f56018eb5bcb4e2265d78d572e8c Mon Sep 17 00:00:00 2001 From: Jakob Unterwurzacher Date: Thu, 17 Jun 2021 19:19:13 +0200 Subject: [PATCH] contrib/maxlen.bash: also test dir and path length Move the script from tests to contrib as it may now be useful to somebody else. https://github.com/rfjakob/gocryptfs/issues/552 --- contrib/maxlen.bash | 74 +++++++++++++++++++++++++++++++++++++++++++++ tests/maxlen.bash | 18 ----------- 2 files changed, 74 insertions(+), 18 deletions(-) create mode 100755 contrib/maxlen.bash delete mode 100755 tests/maxlen.bash diff --git a/contrib/maxlen.bash b/contrib/maxlen.bash new file mode 100755 index 0000000..a4aa082 --- /dev/null +++ b/contrib/maxlen.bash @@ -0,0 +1,74 @@ +#!/bin/bash +# +# Find out the maximum supported filename length and print it. +# +# Part of the gocryptfs test suite +# https://nuetzlich.net/gocryptfs/ + +set -eu +MYNAME=$(basename "$0") + +if [[ $# -ne 1 || $1 == -* ]]; then + echo "Usage: $MYNAME DIRECTORY" + exit 1 +fi + +cd "$1" +echo "Testing $PWD" + +echo -n " Maximum filename length: " +# Add one character at a time until we hit an error +NAME="" +while true ; do + NEXT="${NAME}x" + if [[ -e $NEXT ]]; then + echo "error: file $NEXT already exists" + exit 1 + fi + touch $NEXT 2> /dev/null || break + rm $NEXT + NAME="$NEXT" +done +echo "${#NAME}" + +echo -n " Maximum dirname length: " +# Add one character at a time until we hit an error +NAME="" +while true ; do + NEXT="${NAME}x" + mkdir $NEXT 2> /dev/null || break + rmdir $NEXT + NAME="$NEXT" +done +MAX_DIRNAME=${#NAME} +echo "${#NAME}" + +for CHARS_PER_SUBDIR in 1 10 100 $MAX_DIRNAME ; do + echo -n " Maximum path length with $(printf %3d $CHARS_PER_SUBDIR) chars per subdir: " + # Trick from https://stackoverflow.com/a/5349842/1380267 + SUBDIR=$(printf 'x%.0s' $(seq 1 $CHARS_PER_SUBDIR)) + mkdir "$SUBDIR" + P=$SUBDIR + # Create a deep path, one $SUBDIR at a time, until we hit an error + while true ; do + NEXT="$P/$SUBDIR" + mkdir "$NEXT" 2> /dev/null || break + P=$NEXT + echo -n -e "\b\b\b\b" + printf %4d ${#P} + done + # Then add one character at a time until we hit an error + NAME="" + while true ; do + NEXT="${NAME}x" + touch "$P/$NEXT" 2> /dev/null || break + NAME=$NEXT + done + if [[ $NAME != "" ]] ; then + P=$P/$NAME + fi + echo -n -e "\b\b\b\b" + printf %4d ${#P} + echo + rm -R "$SUBDIR" +done diff --git a/tests/maxlen.bash b/tests/maxlen.bash deleted file mode 100755 index fb133e0..0000000 --- a/tests/maxlen.bash +++ /dev/null @@ -1,18 +0,0 @@ -#!/bin/bash -eu -# -# Find out the maximum supported filename length and print it. -# -# Part of the gocryptfs test suite -# https://nuetzlich.net/gocryptfs/ - -NAME="maxlen." -LEN=0 - -while [ $LEN -le 10000 ]; do - touch $NAME 2> /dev/null || break - rm $NAME - LEN=${#NAME} - NAME="${NAME}x" -done - -echo $LEN