Home / server / Questions / 359168
Accepted
Christian
Asked: 2012-02-12 09:10:04 +0800 CST

inotifywait not reacting

  • 772

I have a very simple script to log when new files are created, in fact, for test purposes I told it to watch for any event.

#!/bin/sh                               

WATCHED_DIR="/var/www/html/magento/media/tmp/catalog/product"

echo "Watching directory: $WATCHED_DIR for events"
inotifywait -m -q -r "$WATCHED_DIR" --format "%|e %w%f" |
  while read resp
  do 
    echo "$resp" >> watcher.log
  done

when i create a file within the watch directory, it reacts and logs

CREATE /var/www/html/magento/media/tmp/catalog/product/2/1/new file
OPEN /var/www/html/magento/media/tmp/catalog/product/2/1/new file
CLOSE_WRITE|CLOSE /var/www/html/magento/media/tmp/catalog/product/2/1/new file
OPEN /var/www/html/magento/media/tmp/catalog/product/2/1/new file
CLOSE_NOWRITE|CLOSE /var/www/html/magento/media/tmp/catalog/product/2/1/new file
OPEN|ISDIR /var/www/html/magento/media/tmp/catalog/product/2/1
OPEN|ISDIR /var/www/html/magento/media/tmp/catalog/product/2/1/
OPEN /var/www/html/magento/media/tmp/catalog/product/2/1/new file
CLOSE_NOWRITE|CLOSE /var/www/html/magento/media/tmp/catalog/product/2/1/new file
CLOSE_NOWRITE|CLOSE|ISDIR /var/www/html/magento/media/tmp/catalog/product/2/1
CLOSE_NOWRITE|CLOSE|ISDIR /var/www/html/magento/media/tmp/catalog/product/2/1/
OPEN /var/www/html/magento/media/tmp/catalog/product/2/1/new file
CLOSE_NOWRITE|CLOSE /var/www/html/magento/media/tmp/catalog/product/2/1/new file
OPEN /var/www/html/magento/media/tmp/catalog/product/2/1/new file
CLOSE_NOWRITE|CLOSE /var/www/html/magento/media/tmp/catalog/product/2/1/new file

but when apache creates a file, nothing is logged

The only difference I can spot is when apache creates the file, the file is owned by apache, where as when i create the file, it is owned by root.

-rwxrwxrwx. 1 apache apache 55659 Feb 11 16:46 2164.jpg
-rw-rw-r--. 1 root   root       0 Feb 11 17:02 new file

The watcher script is run as root.

F S   UID   PID  PPID  C PRI  NI ADDR SZ WCHAN  TTY          TIME CMD
0 S     0 29137  2705  0  80   0 - 26538 wait   pts/14   00:00:00 test.sh
1 S     0 29139 29137  0  80   0 - 26538 pipe_w pts/14   00:00:00 test.sh

Does anyone know the solution?

apache-2.2 inotify centos6

2 Answers

  1. You are using the recursive mode, which adds watch automatically for all subdirectories. The maximum amouint of inode watches per user is 8192, are there more than 8192 directories under /var/www/html/magento/media/tmp/catalog/product ?

    find /var/www/html/magento/media/tmp/catalog/product -type d | wc -l

    if it's greater than 8192 you can do as suggested by the man page: write to /proc/sys/fs/inotify/max_user_watches

    Also, might look stupid but in data you provide, we can see that the apache file was created 16 minutes before the file created by root. Are you certain you launched your script before Feb 11, 16:46 ? Also, if you launched it just before, there is possibility that you did not receive the event because the program was still recursively creating the inode watches, and since you use the "-q" option you have no way to know when this phase has completed.

    • 2
  2. Best Answer

    Seems it took a while to start recording but when it eventually did, it wasnt reporting CLOSE_WRITE, it was reporting MOVED_TO

    CREATE|ISDIR /var/www/html/magento/media/tmp/catalog/product/i
OPEN|ISDIR /var/www/html/magento/media/tmp/catalog/product/i
CLOSE_NOWRITE|CLOSE|ISDIR /var/www/html/magento/media/tmp/catalog/product/i
MOVED_TO /var/www/html/magento/media/tmp/catalog/product/i/n/intelcorei5.jpg
ATTRIB /var/www/html/magento/media/tmp/catalog/product/i/n/intelcorei5.jpg
ATTRIB /var/www/html/magento/media/tmp/catalog/product/i/n/intelcorei5.jpg
    • 1