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139 lines
3.7 KiB
Bash
139 lines
3.7 KiB
Bash
#!/bin/bash
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function print_usage()
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{
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if [ -n "$2" ]; then
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echo "Error: $2"
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echo
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fi
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echo "Usage: $1 <shared dir>"
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echo '(The shared directory is the "share" directory in the scratch' \
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'directory)'
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}
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shared_dir=$1
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if [ -z "$shared_dir" ]; then
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print_usage "$0" 'Shared dir not given' >&2
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exit 1
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fi
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cd "$shared_dir"
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# FIXME: This should not be necessary, but it is. In order for all
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# submounts to be proper mount points, we need to visit them.
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# (Before we visit them, they will not be auto-mounted, and so just
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# appear as normal directories, with the catch that their st_ino will
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# be the st_ino of the filesystem they host, while the st_dev will
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# still be the st_dev of the parent.)
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# `find` does not work, because it will refuse to touch the mount
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# points as long as they are not mounted; their st_dev being shared
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# with the parent and st_ino just being the root node's inode ID
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# will practically ensure that this node exists elsewhere on the
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# filesystem, and `find` is required to recognize loops and not to
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# follow them.
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# Thus, we have to manually visit all nodes first.
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mnt_i=0
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function recursively_visit()
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{
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pushd "$1" >/dev/null
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for entry in *; do
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if [[ "$entry" == mnt* ]]; then
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mnt_i=$((mnt_i + 1))
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printf "Triggering auto-mount $mnt_i...\r"
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fi
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if [ -d "$entry" ]; then
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recursively_visit "$entry"
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fi
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done
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popd >/dev/null
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}
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recursively_visit .
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echo
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if [ -n "$(find -name not-mounted)" ]; then
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echo "Error: not-mounted files visible on mount points:" >&2
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find -name not-mounted >&2
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exit 1
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fi
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if [ ! -f some-file -o "$(cat some-file)" != 'root' ]; then
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echo "Error: Bad file in the share root" >&2
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exit 1
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fi
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shopt -s nullglob
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function check_submounts()
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{
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local base_path=$1
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for mp in mnt*; do
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printf "Checking submount %i...\r" "$((${#devs[@]} + 1))"
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mp_i=$(echo "$mp" | sed -e 's/mnt//')
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dev=$(stat -c '%D' "$mp")
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if [ -n "${devs[mp_i]}" ]; then
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echo "Error: $mp encountered twice" >&2
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exit 1
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fi
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devs[mp_i]=$dev
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pushd "$mp" >/dev/null
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path="$base_path$mp"
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while true; do
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expected_content="$(printf '%s\n%s\n' "$mp_i" "$path")"
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if [ ! -f some-file ]; then
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echo "Error: $PWD/some-file does not exist" >&2
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exit 1
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fi
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if [ "$(cat some-file)" != "$expected_content" ]; then
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echo "Error: Bad content in $PWD/some-file:" >&2
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echo '--- found ---'
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cat some-file
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echo '--- expected ---'
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echo "$expected_content"
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exit 1
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fi
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if [ "$(stat -c '%D' some-file)" != "$dev" ]; then
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echo "Error: $PWD/some-file has the wrong device ID" >&2
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exit 1
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fi
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if [ -d sub ]; then
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if [ "$(stat -c '%D' sub)" != "$dev" ]; then
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echo "Error: $PWD/some-file has the wrong device ID" >&2
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exit 1
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fi
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cd sub
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path="$path/sub"
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else
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if [ -n "$(echo mnt*)" ]; then
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check_submounts "$path/"
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fi
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break
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fi
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done
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popd >/dev/null
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done
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}
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root_dev=$(stat -c '%D' some-file)
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devs=()
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check_submounts ''
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echo
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reused_devs=$(echo "$root_dev ${devs[@]}" | tr ' ' '\n' | sort | uniq -d)
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if [ -n "$reused_devs" ]; then
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echo "Error: Reused device IDs: $reused_devs" >&2
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exit 1
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fi
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echo "Test passed for ${#devs[@]} submounts."
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