fdp(1M) (System Administration Utilities) fdp(1M)
NAME
fdp - create, or restore from, a full file system archive
SYNOPSIS
fdp -B [-dovAENS] [-c count] bkjobid odpname odpdev odplab descript
fdp -RC [-dovAENS] [-c count] odpname odpdev redpname redev rsjobid
descript
DESCRIPTION
The fdp command is invoked as a child process by other shell
commands. The command name, fdp, is read either from the bkhist.tab
file or the bkreg -m command and option. The -B, -R, and -C options
are passed to fdp by the shell commands backup, and restore. The
other options are passed from the bkhist.tab file or the bkreg -p
command and option. The arguments are sent to fdp from various
locations in the backup service.
fdp -B is invoked as a child process by the backdaemon command to
perform a backup of the data partition odpdev (the originating data
partition). All blocks in the data partition are archived. The
resulting backup is created in the format described on dd(1). The
backup is recorded in the backup history log, /etc/bkup/bkhist.tab.
fdp -RC is invoked as a child process by the rsoper command to
restore the entire data partition from an archive created by fdp -B.
The data partition archive is assumed to be in the format described
on dd(1). dd(1) format.
The arguments to fdp are defined as follows:
bkjobid
the job id assigned by backup. The method uses the bkjobid
when it creates history log entries.
odpname
the name of the data partition that is to be backed up.
Unused by fdp, but supplied by backup for command-line
compatibility with other archiving methods.
odpdev the name of the block special device on which the data
partition resides.
odplab the volume name on the file system [see labelit(1M)]. Unused
by fdp, but supplied by backup for command-line compatibility
with other archiving methods.
descript
is a description for a destination device in the form:
dgroup:dname:dchar:dlabels
dgroup specifies a device group [see devgroup.tab(4)].
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dname specifies a particular device name [see device.tab(4)].
dchars specifies characteristics associated with the device.
If specified, dchar overrides the defaults for the specified
device and group. [See device.tab(4) for a further
description of device characteristics].
dlabels specifies the volume names for the media to be used
for reading or writing the archive.
rsjobid
the job id assigned by restore.
redev if non-null, the partition to be restored to instead of
ofsdev.
redpname
unused, but provided for consistency with other methods.
Options
Some options are only significant during fdp -B invocations; they
are accepted but ignored during fdp -R invocations because the
command is invoked and options are specified automatically by
restore. These options are flagged with an asterisk (*).
c*count Archives or restores only the first count (512 byte) blocks
of data in the data partition.
d* Inhibits recording the archive in the backup history log.
o Permits the user to override media insertion requests [see
getvol(1M) and the description of the -o option].
v* Validates the archive as it is written. A checksum is
computed as the archive is being written; as each medium is
completed, it is re-read and the checksum recomputed to
verify that each block is readable and correct. If either
check fails, the medium is considered unreadable. If -A
has been specified, the archiving operation fails;
otherwise, the operator is prompted to replace the failed
medium.
A Establishes automated mode, (i.e., does not prompt the user
to insert or remove media).
E* Reports an estimate of media usage for the archive; then
performs the backup.
N* Reports an estimate of media usage for the archive; does
not perform the backup.
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fdp(1M) (System Administration Utilities) fdp(1M)
S Displays a period (.) for every 100 (512 byte) blocks
read-from or written-to the archive on the destination
device.
User Interactions
The connection between an archiving method and backup is more complex
than a simple fork/exec or pipe. The backup command is responsible
for all interactions with the user, either directly, or through the
bkoper command. Therefore, fdp neither reads from standard-input nor
writes to standard-output or standard-error. A method library must
be used [see libbrmeth(3)] to communicate reports (estimates,
filenames, periods, status, etc.) to backup.
DIAGNOSTICS
The exit codes for fdp are the following:
0 successful completion of the task
1 one or more parameters to fdp are invalid.
2 an error has occurred which caused fdp to fail to complete all
portions of its task.
FILES
/etc/bkup/bkexcept.tab
lists the files that are to be excluded from an
incremental file system backup.
/etc/bkup/bkhist.tab
lists the labels of all volumes that have been used
for backup operations.
/etc/bkup/rsstatus.tab
tracks the status ofall restore requests from users.
/etc/bkup/bklog logs errors generated by the backup methods and the
backup command
/etc/bkup/rslog logs errors generated by the restore methods and the
restore command
$TMP/filelist$$ temporarily stores a table of contents for a backup
archive.
SEE ALSO
backup(1M), device.tab(4), fdp(1), ffile(1), fimage(1), getvol(1M),
incfile(1), labelit(1M), libbrmeth(3), prtvtoc(1M), rsoper(1M),
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