On Saturday 11 June 2005 02:48, Karl Chen wrote:
> >>>>> On 2005-06-10 15:26 PDT, Blaisorblade writes:
>
> Blaisorblade> Ok, in this case there's probably a simpler
> Blaisorblade> road: simply use a 2.4.27-1bs kernel. The
> Blaisorblade> implemented behaviour is that all created files
> Blaisorblade> will have the ID they have on the host, i.e. the
> Blaisorblade> ID of the user running UML.
>
> Thanks for the tip! I will be running UML under different user
> IDs but I'd rather it always be the same uid inside the UML. I
> used this micropatch to get exactly the behavior I want. It's
> obviously for this particular experiment only; I still think
> uid,gid mount options would be better in general. I guess that's
> only 5 or 10 more lines of code...
Yes, I just need a bit of time to implement all cases and especially option
parsing. And I can confirm your micropatch does exactly the work you need.
> diff -u
> /home/quarl/proj/uml/linux/linux-2.4.27/arch/um/fs/hostfs/.backup/hostfs_ke
>rn.c.\~1\~
> /home/quarl/proj/uml/linux/linux-2.4.27/arch/um/fs/hostfs/hostfs_kern.c ---
> /home/quarl/proj/uml/linux/linux-2.4.27/arch/um/fs/hostfs/.backup/hostfs_ke
>rn.c.~1~ 2005-06-10 16:58:51.000000000 -0700 +++
> /home/quarl/proj/uml/linux/linux-2.4.27/arch/um/fs/hostfs/hostfs_kern.c
> 200
>5-06-10 17:35:01.829485585 -0700 @@ -1,3 +1,6 @@
> +#define KLUDGE_FS_UID 7777
> +#define KLUDGE_FS_GID 7777
> +
> /*
> * Copyright (C) 2000 - 2003 Jeff Dike ([EMAIL PROTECTED])
> * Licensed under the GPL
> @@ -142,6 +145,10 @@
> ino->i_blocks = i_blocks;
> if(kdev_same(ino->i_sb->s_dev, ROOT_DEV) && (ino->i_uid == getuid()))
> ino->i_uid = 0;
> + else if (ino->i_uid == getuid()) { /* KC KLUDGE */
> + ino->i_uid = KLUDGE_FS_UID; /* KC KLUDGE */
> + ino->i_gid = KLUDGE_FS_GID; /* KC KLUDGE */
> + } /* KC KLUDGE */
> return(0);
> }
>
> @@ -760,13 +767,17 @@
> if(kdev_same(dentry->d_inode->i_sb->s_dev, ROOT_DEV) &&
> (attr->ia_uid == 0))
> attr->ia_uid = getuid();
> + else if (attr->ia_uid == KLUDGE_FS_UID) { /* KC KLUDGE */
> + attr->ia_uid = getuid(); /* KC KLUDGE */
> + attr->ia_gid = getgid(); /* KC KLUDGE */
> + } /* KC KLUDGE */
> attrs.ia_valid |= HOSTFS_ATTR_UID;
> attrs.ia_uid = attr->ia_uid;
> }
> if(attr->ia_valid & ATTR_GID){
> if(kdev_same(dentry->d_inode->i_sb->s_dev, ROOT_DEV) &&
> (attr->ia_gid == 0))
> - attr->ia_gid = getuid();
> + attr->ia_gid = getgid();
> attrs.ia_valid |= HOSTFS_ATTR_GID;
> attrs.ia_gid = attr->ia_gid;
> }
--
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade
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