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Monitor file changed / created events on big FS

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Operating Systems HP-UX Monitor file changed / created events on big FS
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Old 05-26-2009
Monitor file changed / created events on big FS
Hi all,

The configuration:

We are useing a HP-UX Server with vxfs File System. The files on this server have normally a umask of 022 (owned by a administrative account) users who have write access to certain files get custom ACL entries that add these rights for the specific user.

Now a Samba server is running to make the files accessible from within Windows Clients.

The problem:

It seams that when a user saves a file from the Windows Client through Samba the file looses the special ACL rights (maybee it's recreated) so that the user can not save again (File is owned by an other user)

Second problem is that a new file has to get the correct ACL's. For now we have a cron job that does ACL fixing every 2 hours for that.

The question:

Is it somehoe possible to monitor the file system for new files / changed files so that everytime a file is changed / created the ACL's can directly be fixed?

Unfortunately we have >1 TB of data in millions of files in thousands of directories so that a find or simillar would consume lots of resources and need multiple minutes per run.

An other idea would be to create a file system overlay that would be mounted over the real fs and triggers the events. Does anybody has an example for something like this on HP-UX or any other idea on how to do this? I know that on Linux and also Windows theer are API methods available for these tasks, so it should be on HP-UX too i hope.

Thanks for any sugestions!
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LEARN ABOUT NETBSD

umask

UMASK(2)						      BSD System Calls Manual							  UMASK(2)

NAME

     umask -- set file creation mode mask

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <sys/stat.h>

     mode_t
     umask(mode_t numask);

DESCRIPTION

     The umask() routine sets the process's file mode creation mask to numask and returns the previous value of the mask.  The 9 low-order access
     permission bits of numask are used by system calls, including open(2), mkdir(2), mkfifo(2) and mknod(2) to turn off corresponding bits
     requested in file mode.  (See chmod(2)).  This clearing allows each user to restrict the default access to his files.

     The default mask value is S_IWGRP|S_IWOTH (022, write access for the owner only).	Child processes inherit the mask of the calling process.

RETURN VALUES

     The previous value of the file mode mask is returned by the call.

ERRORS

     The umask() function is always successful.

SEE ALSO

     chmod(2), mkdir(2), mkfifo(2), mknod(2), open(2)

STANDARDS

     The umask() function conforms to ISO/IEC 9945-1:1990 (``POSIX.1'').

BSD
								   June 4, 1993 							       BSD