fsdb_hfs.1m (2010 09)

fsdb_hfs(1M) fsdb_hfs(1M)

maj Major device number

md Mode

min Minor device number

mt Time last modiﬁed

sz File size in byte unit

uid User ID number

The following mnemonics are used for directory examination:

di I-number of the associated directory entry

nm Name of the associated directory entry

EXAMPLES

386i Print i-number 386 in an inode format. This now becomes the current working inode.

ln=4 Change the link count for the working inode to 4.

ln=+1 Increment the link count by 1.

fc Print in ASCII fragment zero of the ﬁle associated with the working inode.

2i.fd Print the ﬁrst fragment-size piece of directory entries for the root inode of this ﬁle sys-

tem.

d5i.fc Change the current inode to that associated with the ﬁfth directory entry (numbered from

zero) found from the above command. The ﬁrst fragment’s worth of bytes of the ﬁle are

then printed in ASCII.

1b.px Print the ﬁrst fragment of the superblock of this ﬁle system in hexadecimal.

2i.a0b.d7=3

Change the i-number for the seventh directory slot in the root directory to 3. This exam-

ple also shows how several operations can be combined on one command line.

d7.nm="newname"

Change the name ﬁeld in the directory slot to the given string. Quotes are optional if the

ﬁrst character of the name ﬁeld is alphabetic.

a2b.p0d Print the third fragment of the current inode as directory entries.

WARNINGS

Only experienced users should use

fsdb. The failure to fully understand the usage of fsdb and the ﬁle

system’s internal organization can lead to complete destruction of the ﬁle system and total loss of data.

AUTHOR

fsdb was developed by HP and AT&T.

FILES

/etc/fstab Static information about the ﬁle systems