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Old 4 Weeks Ago
anthonyc anthonyc is offline
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Question chflags issue

Hi,

I'am trying some protection on files with chflags but i have issues.

As root user:
Code:
> touch /etc/file1
> chflags sappnd /etc/file1
> echo test >/etc/file1
chflags: /etc/file1: Operation not permitted
> chflags nosappnd /etc/file1
chflags: /etc/file1: Operation not permitted
root user cannot write to the file with append-only flag and it cannot remove the flag

What's wrong ?

Thanks.

Last edited by anthonyc; 4 Weeks Ago at 02:31 PM.
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Old 4 Weeks Ago
e1-531g e1-531g is offline
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Quote:
Originally Posted by anthonyc View Post
What's wrong ?
Everything is alright.

You must restart your operating system to security level 0 if you want to remove sappnd flag.

You probably can append to file. Use >> instead of >.

See chflags(1) and securelevel(7) manpages.
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Last edited by e1-531g; 4 Weeks Ago at 08:07 PM. Reason: added manpages
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Old 4 Weeks Ago
anthonyc anthonyc is offline
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Thanks !

I use chattr on Linux that do not need a restart to remove flags

OpenBSD is really a more secure OS.
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Old 4 Weeks Ago
e1-531g e1-531g is offline
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Quote:
Originally Posted by anthonyc View Post
Thanks !

I use chattr on Linux that do not need a restart to remove flags

OpenBSD is really a more secure OS.
Yes, Linux's chattr is slightly different than OpenBSD's chflags.
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