libzfs tries to write to /dev/zfs and /etc/dfs on load

[floppym]

libzfs (libshare?) tries to write to /dev/zfs and /etc/dfs on load. This is somewhat problematic when the library is loaded in a sandboxed environment.

For example, the GRUB bootloader has utilities which optionally link with libzfs. These utilities are invoked as part of the GRUB build process, which results in libzfs being loaded and triggers the following sandbox errors on Gentoo Linux:

 �[31;01m*�[0m --------------------------- ACCESS VIOLATION SUMMARY ---------------------------
 �[31;01m*�[0m LOG FILE: "/var/log/sandbox/sandbox-23830.log"
 �[31;01m*�[0m 
VERSION 1.0
FORMAT: F - Function called
FORMAT: S - Access Status
FORMAT: P - Path as passed to function
FORMAT: A - Absolute Path (not canonical)
FORMAT: R - Canonical Path
FORMAT: C - Command Line

F: open_wr
S: deny
P: /dev/zfs
A: /dev/zfs
R: /dev/zfs
C: grub-mkimage --help 

F: mkstemp64
S: deny
P: /etc/dfs/sharetab.XXXXXX
A: /etc/dfs/sharetab.XXXXXX
R: /etc/dfs/sharetab.XXXXXX
C: grub-mkimage --help 

Can the libshare library be modified to not write to these locations when the library is loaded?

I believe the relevant code path starts in the libshare_init function in lib/libshare/libshare.c.

[FransUrbo]

Libshare needs to be redesigned/-written. Also see #1484

[behlendorf]

This issue was resolved. The /dev/zfs device is not longer access when the library is loaded.