22 Feb
2015
22 Feb
'15
8:36 p.m.
I just had it brought to my attention that the unix kernel is mode 777
in Unix v5 and v6:
ls -l /unix
-rwxrwx 1 root 27066 Mar 23 1975 /unix
There's no reason for it to be mode 777 is there? It seems rather dangerous.
In Unix v7 it defaults to mode 775 and in 32v it is 755. I figure it
setting it to mode 755 will work and so far it seems fine in v5.
Mark
22 Feb
22 Feb
8:49 p.m.
Your ls is missing a set of perms (-rwxrwxrwx).
No it should not be 777. It needs to be readable because certain programs in user mode
read the symbol table.
9:30 p.m.
Ron,
You are quite right. I tried to use 1bsd's ls in v5 for the columnar
output and there are bugs.
This is what it should look like:
ls -l /unix
-rwxr-xr-x 1 root 27066 Feb 22 14:34 unix
So it's now mode 755 and everything seems to work fine.
Mark
On 2/22/15, Ronald Natalie <ron(a)ronnatalie.com> wrote:
Your ls is missing a set of perms (-rwxrwxrwx).
No it should not be 777. It needs to be readable because certain programs
in user mode read the symbol table.
8:56 p.m.
On Sun, 22 Feb 2015, Mark Longridge wrote:
I just had it brought to my attention that the unix
kernel is mode 777
in Unix v5 and v6:
ls -l /unix
-rwxrwx 1 root 27066 Mar 23 1975 /unix
There's no reason for it to be mode 777 is there? It seems rather
dangerous.
Those were happy days back then.
--
Dave Horsfall DTM (VK2KFU) "Bliss is a MacBook with a FreeBSD server."
http://www.horsfall.org/spam.html (and check the home page whilst you're there)
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Dave Horsfall -
Mark Longridge -
Ronald Natalie