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fwtmp.1m (2010 09)

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fwtmp(1M) fwtmp(1M)
NAME
fwtmp, wtmpfix - manipulate connect accounting records
SYNOPSIS
/usr/sbin/acct/fwtmp
[ -icX ]
/usr/sbin/acct/wtmpfix
[ files ]
DESCRIPTION
fwtmp
fwtmp reads from the standard input and writes to the standard output, converting binary records of the
type found in wtmps to formatted ASCII records. The ASCII version is useful to enable editing, via
ed(1), bad records or for general purpose maintenance of the file.
The argument
-ic is used to denote that input is in ASCII form, and output is to be written in binary
form. The arguments i and c are independent, respectively specifying ASCII input and binary output.
Therefor, -i is an ASCII to ASCII copy and
-c is a binary to binary copy. -X should be used for reading
wtmps-likerecords. If -X is not used,
utmp-like structure is read.
wtmpfix
wtmpfix examines the standard input or named files in
wtmps format, corrects the time/date stamps to
make the entries consistent, and writes to the standard output. A
- can be used in place of files to indi-
cate the standard input. If time/date corrections are not performed,
acctcon1 will fault when it
encounters certain date-change records.
Each time the date is set, a pair of date change records is written to
WTMPS_FILE. The first record is
the old date denoted by the string old time placed in the line field and the flag
OLD_TIME placed in the
type field of the
utmps structure. The second record specifies the new date, and is denoted by the string
new time placed in the line field and the flag NEW_TIME placed in the type field.
wtmpfix uses these
records to synchronize all time stamps in the file.
wtmpfix nullifies date change records when writing
to the standard output by setting the time field of the utmps structure in the old date change record
equal to the time field in the new date change record. This prevents wtmpfix and
acctcon1 from fac-
toring in a date change record pair more than once.
In addition to correcting time/date stamps, wtmpfix checks the validity of the name field to ensure that it
consists solely of alphanumeric characters or spaces. If it encounters a name that is considered invalid, it
changes the login name to
INVALID and writes a diagnostic to the standard error. This minimizes the
risk that acctcon1 will fail when processing connect accounting records.
DIAGNOSTICS
wtmpfix generates the following diagnostics messages:
Cannot make temporary: xxx failed to make temp file
Input truncated at offset: xxx missing half of date pair
New date expected at offset: xxx missing half of date pair
Cannot read from temp: xxx some error reading
Bad file at offset: xxx ut_line entry not digit, alpha, nor | or {
(First character only checked.)
Out of core: malloc fails. (Saves table of date changes.)
No dtab: software error (Rarely seen, if ever.)
WARNINGS
fwtmp generates no errors, even on garbage input.
FILES
/usr/include/utmp.h
/var/adm/wtmp
/var/adm/wtmps
SEE ALSO
ed(1), acct(1M), acctcms(1M), acctcom(1M), acctcon(1M), acctmerg(1M), acctprc(1M), acctsh(1M),
runacct(1M), acct(2), acct(4), utmp(4), wtmps(4).
HP-UX 11i Version 3: September 2010 − 1 − Hewlett-Packard Company 1

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