If
vfs_fstype
is specified as ``ignore'' the entry is ignored. This is useful to show
disk partitions which are currently unused.
The fourth field,
( fs_mntops ),
describes the mount options associated with the filesystem.
It is formatted as a comma separated list of options. It contains at least
the type of mount plus any additional options appropriate to the filesystem
type. For documentation on the available options for non-nfs file systems,
see
mount (8).
For documentation on all nfs-specific options have a look at
nfs (5).
The fifth field,
( fs_freq ),
is used for these filesystems by the
dump (8)
command to determine which filesystems need to be dumped. If the fifth
field is not present, a value of zero is returned and
dump
will assume that the filesystem does not need to be dumped.
The sixth field,
( fs_passno ),
is used by the
fsck (8)
program to determine the order in which filesystem checks are done at
reboot time. The root filesystem should be specified with a
fs_passno
of 1, and other filesystems should have a
fs_passno
of 2. Filesystems within a drive will be checked sequentially, but
filesystems on different drives will be checked at the same time to utilize
parallelism available in the hardware. If the sixth field is not present
or zero, a value of zero is returned and
fsck
will assume that the filesystem does not need to be checked.
The proper way to read records from
fstab
is to use the routines
getmntent (3).