Date: Wed, 2 Jul 1997 20:19:25 -0400 From: Randall Hopper <rhh@ct.picker.com> To: hackers@freebsd.org Subject: suid "mountzip" -- UFS works but MSDOS doesn't (?) Message-ID: <19970702201925.23792@ct.picker.com>
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I have a suid perl script that I use to mount file systems on my ZIP
drive (attached). It works fine for for UFS, but the MSDOS mount denies
permission.
Any ideas why?
> mountzip
/dev/sd0s1 on /zip: Incorrect super block.
msdos: /dev/sd0s4: Permission denied
Mount failed
__________________________________________________________________________
> cat /opt/bin/mountzip
# cat /opt/bin/mountzip
#!/usr/bin/suidperl -w
$ENV{'PATH'} = '/bin:/usr/bin:/usr/sbin:/sbin';
$ENV{'SHELL'} = '/bin/sh' if defined $ENV{'SHELL'};
$ENV{'IFS'} = '' if defined $ENV{'IFS'};
( !system( "mount /zip" ) && print "/zip mounted\n" ) ||
( !system( "mount /doszip" ) && print "/doszip mounted\n" ) ||
die "Mount failed\n";
__________________________________________________________________________
> ls -l /opt/bin/mountzip
-rws--x--- 1 root wheel 326 May 4 09:34 /opt/bin/mountzip*
> ls -l /sbin/mount /sbin/mount_msdos
-r-xr-xr-x 1 bin bin 69632 Mar 25 14:42 /sbin/mount*
-r-xr-xr-x 1 bin bin 139264 Mar 25 14:43 /sbin/mount_msdos*
> grep zip /etc/fstab
/dev/sd0s1 /zip ufs rw,noauto 0 0
/dev/sd0s4 /doszip msdos ro,noauto 0 0
> ls -l /dev/sd0s[14]
brw-r----- 1 root operator 4, 0x00020002 May 5 19:36 /dev/sd0s1
brw-r----- 1 root operator 4, 0x00050002 May 5 19:36 /dev/sd0s4
> ls -ld /zip /doszip
drwxr-xr-x 2 root wheel 512 May 5 19:44 /doszip/
drwxr-xr-x 2 root wheel 512 May 5 19:44 /zip/
BTW, this is on 2.2.1.
Randall Hopper
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