From: "Vineet Joglekar" <vintya@excite.com>
To: linux-c-programming@vger.kernel.org
Subject: Can I allocate few bytes in a file to store info about that file; not visible to user?
Date: Mon, 26 Apr 2004 10:32:41 -0400 (EDT) [thread overview]
Message-ID: <20040426143241.376E2197372@xprdmailfe3.nwk.excite.com> (raw)
Hi all,
In ext2fs, while creating a file, can I allocate a number of bytes for that file in advance, such that those bytes are not seen by the user? that is,
suppose I am creating a new file temp, then allocate 50 bytes immediately after creating the file. I want to use those bytes to store the file related info; accessible only to kernel. Whatever data user wants to add, will be added after the these 50 bytes. If user does lseek(fd,0,SEEK_SET), then the file pointer should point to the 51st byte. The 1st 50 bytes shouldnt be visible to user. I dont care if the file size is shown as userdata+50. Is it possible to achieve? If yes, how?
Thanks and regards,
Vineet
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next reply other threads:[~2004-04-26 14:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-26 14:32 Vineet Joglekar [this message]
2004-04-26 17:05 ` Can I allocate few bytes in a file to store info about that file; not visible to user? Glynn Clements
-- strict thread matches above, loose matches on Subject: below --
2004-04-28 18:15 Vineet Joglekar
2004-04-29 3:58 ` Vadiraj C S
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