在inotifywait中是否认为delete事件是close_write ?

Question

我有一个简单的inotifywait脚本，它监视FTP文件上传是否关闭，然后将它们移动到aws s3。除了在inotify日志中，它表明没有找到文件(尽管该文件确实上传到s3)之外，它似乎正在工作。s3 move命令将文件移动到云中，并在本地删除。这可能是因为inotifywait检测到删除文件为close_write事件吗?为什么inotify似乎执行了两次命令?

TARGET=/home/*/ftp/files
inotifywait -m -r -e close_write $TARGET |
while read directory action file
do
if [[ "$file" =~ .*mp4$ ]]
then
echo COPY PATH IS "$directory$file"
aws s3 mv "$directory$file" s3://bucket
fi
done

示例日志:

Setting up watches.  Beware: since -r was given, this may take a while!
Watches established.
COPY PATH IS /home/user/ftp/files/2022/05/16/user-cam-1_00_20220516114055.mp4
COPY PATH IS /home/user/ftp/files/2022/05/16/user-cam-1_00_20220516114055.mp4
COPY PATH IS /home/user/ftp/files/2022/05/16/user-cam-1_00_20220516114055.mp4
move: ../user/ftp/files/2022/05/16/user-cam-1_00_20220516114055.mp4 to s3://bucket/user-cam-1_00_20220516114055.mp4
upload: ../user/ftp/files/2022/05/16/user-cam-1_00_20220516114055.mp4 to s3://bucket/user-cam-1_00_20220516114055.mp4
move failed: ../user/ftp/files/2022/05/16/user-cam-1_00_20220516114055.mp4 to s3://bucket/user-cam-1_00_20220516114055.mp4 [Errno 2] No such file or directory: '/home/user/ftp/files/2022/05/16/user-cam-1_00_20220516114055.mp4'
rm: cannot remove '/home/user/ftp/files/2022/05/16/user-cam-1_00_20220516114055.mp4': No such file or directory
                                            

Answer 1

清理您的脚本，并添加了一些安全引号，并检查已处理的文件，以防文件系统触发相同文件的重复事件。

#!/usr/bin/env bash
# Prevents expanding pattern without matches
shopt -s nullglob
# Expands pattern into an array
target=(/home/*/ftp/files/)
# Creates temporary directory and cleanup trap
declare -- tmpdir=
if tmpdir=$(mktemp -d); then
trap 'rm -fr -- "$tmpdir"' EXIT INT
else
# or exit error if it fails
exit 1
fi
# In case no target matches, exit error
[ "${#target[@]}" -gt 0 ] || exit 1
s3move() {
local -- p=$1
local -- tmp="$tmpdir/$p"
printf 'Copy path is: %sn' "$p"
# Moves the file to temporary dir
# so it is away from inotify watch dir ASAP
mv -- "$p" "$tmp"
# Then perform the slow remote copy to s3 bucket
# Remove the echo onces it is ok
echo aws s3 mv "$p" s3://bucket

# File has been copied to s3, tmp file no longer needed
rm -f -- "$tmp"
}
while read -r -d '' p; do
# Skip if file does not exist, as it has already been moved away
# case of a duplicate event for already processed file
[ -e "$p" ] || continue
s3move "$p"
done < <(
# Good practice to spell long option names in a script
# --format will print null-delimited full file path
inotifywait 
--monitor 
--recursive 
--event close_write 
--includei '.*.mp4$' 
--format '%w%f%0' 
"${target[@]}" 2>/dev/null
)