>>>>> 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...
diff -u
/home/quarl/proj/uml/linux/linux-2.4.27/arch/um/fs/hostfs/.backup/hostfs_kern.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_kern.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
2005-06-10 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;
}
--
Karl 2005-06-10 17:44
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