auditreduce(1M) System Administration Commands auditreduce(1M)
auditreduce - merge and select audit records from audit trail files
auditreduce [options] [audit-trail-file]...
auditreduce allows you to select or merge records from audit trail
files. Audit files can be from one or more machines.
The merge function merges together audit records from one or more input
audit trail files into a single output file. The records in an audit
trail file are assumed to be sorted in chronological order (oldest
first) and this order is maintained by auditreduce in the output file.
Unless instructed otherwise, auditreduce will merge the entire audit
trail, which consists of all the audit trail files in the directory
structure audit_root_dir/*/files (see audit_control(4) for details of
the structure of the audit root). Unless specified with the -R or -S
option, audit_root_dir defaults to /etc/security/audit. By using the
file selection options it is possible to select some subset of these
files, or files from another directory, or files named explicitly on
the command line.
The select function allows audit records to be selected on the basis of
numerous criteria relating to the record's content (see audit.log(4)
for details of record content). A record must meet all of the record-
selection-option criteria to be selected.
Audit Trail Filename Format
Any audit trail file not named on the command line must conform to the
audit trail filename format. Files produced by the audit system already
have this format. Output file names produced by auditreduce are in this
format. It is:
where start-time is the 14-character timestamp of when the file was
opened, end-time is the 14-character timestamp of when the file was
closed, and suffix is the name of the machine which generated the audit
trail file, or some other meaningful suffix (for example, all, if the
file contains a combined group of records from many machines). The end-
time can be the literal string not_terminated, to indicate that the
file is still being written to by the audit system. Timestamps are of
the form yyyymmddhhmmss (year, month, day, hour, minute, second). The
timestamps are in Greenwich Mean Time (GMT).
File Selection Options
The file selection options indicate which files are to be processed and
certain types of special treatment.
All of the records from the input files will be selected regardless
of their timestamp. This option effectively disables the -a, -b,
and -d options. This is useful in preventing the loss of records if
the -D option is used to delete the input files after they are pro‐
cessed. Note, however, that if a record is not selected due to
another option, then -A will not override that.
Only process complete files. Files whose filename end-time time‐
stamp is not_terminated are not processed (such a file is currently
being written to by the audit system). This is useful in preventing
the loss of records if -D is used to delete the input files after
they are processed. It does not apply to files specified on the
Delete input files after they are read if the entire run is suc‐
cessful. If auditreduce detects an error while reading a file, then
that file is not deleted. If -D is specified, -A, -C and -O are
also implied. suffix is given to the -O option. This helps prevent
the loss of audit records by ensuring that all of the records are
written, only complete files are processed, and the records are
written to a file before being deleted. Note that if both -D and -O
are specified in the command line, the order of specification is
significant. The suffix associated with the latter specification is
Allows selection of records from files with machine as the filename
suffix. If -M is not specified, all files are processed regardless
of suffix. -M can also be used to allow selection of records from
files that contain combined records from many machines and have a
common suffix (such as all).
Select objects in new mode.This flag is off by default, thus
retaining backward compatibility. In the existing, old mode, speci‐
fying the -e, -f, -g, -r, or -u flags would select not only actions
taken with those IDs, but also certain objects owned by those IDs.
When running in new mode, only actions are selected. In order to
select objects, the -o option must be used.
Direct output stream to a file in the current audit_root_dir with
the indicated suffix. suffix can alternatively contain a full path‐
name, in which case the last component is taken as the suffix,
ahead of which the timestamps will be placed, ahead of which the
remainder of the pathname will be placed. If the -O option is not
specified, the output is sent to the standard output. When auditre‐
duce places timestamps in the filename, it uses the times of the
first and last records in the merge as the start-time and end-time.
Quiet. Suppress notification about errors with input files.
Specify the pathname of an alternate audit root directory
audit_root_dir to be pathname. Therefore, rather than using
/etc/security/audit/*/files by default, pathname/*/files will be
The root file system of any non-global zones must not be refer‐
enced with the -R option. Doing so might damage the global zone's
file system, might compromise the security of the global zone,
and might damage the non-global zone's file system. See zones(5).
This option causes auditreduce to read audit trail files from a
specific location (server directory). server is normally inter‐
preted as the name of a subdirectory of the audit root, therefore
auditreduce will look in audit_root_dir/server/files for the audit
trail files. But if server contains any `/' characters, it is the
name of a specific directory not necessarily contained in the audit
root. In this case, server/files will be consulted. This option
allows archived files to be manipulated easily, without requiring
that they be physically located in a directory structure like that
Verbose. Display the name of each file as it is opened, and how
many records total were written to the output stream.
Record Selection Options
The record selection options listed below are used to indicate which
records are written to the output file produced by auditreduce.
Multiple arguments of the same type are not permitted.
Select records that occurred at or after date-time. The date-time
argument is described under Option Arguments, below. date-time is
in local time. The -a and -b options can be used together to form a
Select records that occurred before date-time.
Select records by audit class. Records with events that are mapped
to the audit classes specified by audit-classes are selected. Audit
class names are defined in audit_class(4). The audit-classes can be
a comma separated list of audit flags like those described in
audit_control(4). Using the audit flags, one can select records
based upon success and failure criteria.
Select records that occurred on a specific day (a 24-hour period
beginning at 00:00:00 of the day specified and ending at 23:59:59).
The day specified is in local time. The time portion of the argu‐
ment, if supplied, is ignored. Any records with timestamps during
that day are selected. If any hours, minutes, or seconds are given
in time, they are ignored. -d can not be used with -a or -b.
Select records with the specified effective-user.
Select records with the specified effective-group.
Select records with the specified real-group.
Select records with the specified subject-ID where subject-ID is a
Select records with the specified label (or label range), as
explained under "Option Arguments," below. This option is available
only if the system is configured with Trusted Extensions.
Select records with the indicated event. The event is the literal
string or the event number.
Select records by object type. A match occurs when the record con‐
tains the information describing the specified object_type and the
object ID equals the value specified by objectID_value. The allow‐
able object types and values are as follows:
Select records containing file system objects with the speci‐
fied pathname, where pathname is a comma separated list of reg‐
ular expressions. If a regular expression is preceded by a
tilde (~), files matching the expression are excluded from the
output. For example, the option file=~/usr/openwin,/usr,/etc
would select all files in /usr or /etc except those in
/usr/openwin. The order of the regular expressions is important
because auditreduce processes them from left to right, and
stops when a file is known to be either selected or excluded.
Thus the option file= /usr, /etc, ~/usr/openwin would select
all files in /usr and all files in /etc. Files in /usr/openwin
are not excluded because the regular expression /usr is matched
first. Care should be given in surrounding the pathname with
quotes so as to prevent the shell from expanding any tildes.
Select records containing file system objects with group as the
Select records containing file system objects with user as the
Select records containing message queue objects with the speci‐
fied ID where ID is a message queue ID.
Select records containing message queue objects with group as
the owning or creating group.
Select records containing message queue objects with user as
the owning or creating user.
Select records containing process objects with the specified ID
where ID is a process ID. Process are objects when they are
receivers of signals.
Select records containing process objects with group as the
real or effective group.
Select records containing process objects with user as the real
or effective user.
Select records containing semaphore objects with the specified
ID where ID is a semaphore ID.
Select records containing semaphore objects with group as the
owning or creating group.
Select records containing semaphore objects with user as the
owning or creating user.
Select records containing shared memory objects with the speci‐
fied ID where ID is a shared memory ID.
Select records containing shared memory objects with group as
the owning or creating group.
Select records containing shared memory objects with user as
the owning or creating user.
Select records containing socket objects with the specified
port_number or the specified machine where machine is a machine
name as defined in hosts(4).
Select records containing fault management resource identifier
(FMRI) objects with the specified service instance. See smf(5).
Select records with the specified real-user.
Select audit records with the specified session-id.
Select records with the specified audit-user.
Select records from the specified zone name. The zone name selec‐
tion is case-sensitive.
When one or more filename arguments appear on the command line, only
the named files are processed. Files specified in this way need not
conform to the audit trail filename format. However, -M, -S, and -R
must not be used when processing named files. If the filename is ``−''
then the input is taken from the standard input.
An audit trail file as defined in audit.log(4). An audit trail file
not named on the command line must conform to the audit trail file
name format. Audit trail files produced as output of auditreduce
are in this format as well. The format is:
start-time . end-time . suffix
start-time is the 14 character time stamp denoting when the file
was opened. end-time is the 14 character time stamp denoting when
the file was closed. end-time can also be the literal string
not_terminated, indicating the file is still be written to by the
audit daemon or the file was not closed properly (a system crash or
abrupt halt occurred). suffix is the name of the machine that gen‐
erated the audit trail file (or some other meaningful suffix; for
example, all would be a good suffix if the audit trail file con‐
tains a combined group of records from many machines).
The date-time argument to -a, -b, and -d can be of two forms: An
absolute date-time takes the form:
yyyymmdd [ hh [ mm [ ss ]]]
where yyyy specifies a year (with 1970 as the earliest value), mm
is the month (01-12), dd is the day (01-31), hh is the hour
(00-23), mm is the minute (00-59), and ss is the second (00-59).
The default is 00 for hh, mm and ss.
An offset can be specified as: +n d|h|m| s where n is a number of
units, and the tags d, h, m, and s stand for days, hours, minutes
and seconds, respectively. An offset is relative to the starting
time. Thus, this form can only be used with the -b option.
The literal string or ordinal event number as found in
audit_event(4). If event is not found in the audit_event file it is
The literal string or ordinal group ID number as found in group(4).
If group is not found in the group file it is considered invalid.
group can be negative.
The literal string representation of a MAC label or a range of two
valid MAC labels. To specify a range, use x;y where x and y are
valid MAC labels. Only those records that are fully bounded by x
and y will be selected. If x or y is omitted, the default uses
ADMIN_LOW or ADMIN_HIGH respectively. Notice that quotes must be
used when specifying a range.
A regular expression describing a pathname.
The literal username or ordinal user ID number as found in
passwd(4). If the username is not found in the passwd file it is
considered invalid. user can be negative.
Example 1 The auditreduce command
praudit(1M) is available to display audit records in a human-readable
This will display the entire audit trail in a human-readable form:
% auditreduce | praudit
If all the audit trail files are being combined into one large file,
then deleting the original files could be desirable to prevent the
records from appearing twice:
% auditreduce -V -D /etc/security/audit/combined/all
This displays what user milner did on April 13, 1988. The output is
displayed in a human-readable form to the standard output:
% auditreduce -d 19880413 -u milner | praudit
The above example might produce a large volume of data if milner has
been busy. Perhaps looking at only login and logout times would be sim‐
pler. The -c option will select records from a specified class:
% auditreduce -d 19880413 -u milner -c lo | praudit
To see milner's login/logout activity for April 13, 14, and 15, the
following is used. The results are saved to a file in the current work‐
ing directory. Notice that the name of the output file will have mil‐
nerlo as the suffix, with the appropriate timestamp prefixes. Notice
also that the long form of the name is used for the -c option:
% auditreduce -a 19880413 -b +3d -u milner -c login_logout -O milnerlo
To follow milner's movement about the file system on April 13, 14, and
15 the chdir record types could be viewed. Notice that in order to get
the same time range as the above example we needed to specify the -b
time as the day after our range. This is because 19880416 defaults to
midnight of that day, and records before that fall on 0415, the end-day
of the range.
% auditreduce -a 19880413 -b 19880416 -u milner -m AUE_CHDIR | praudit
In this example, the audit records are being collected in summary form
(the login/logout records only). The records are being written to a
summary file in a different directory than the normal audit root to
prevent the selected records from existing twice in the audit root.
% auditreduce -d 19880330 -c lo -O /etc/security/audit_summary/logins
If activity for user ID 9944 has been observed, but that user is not
known to the system administrator, then the command in the following
example searches the entire audit trail for any records generated by
that user. auditreduce queries the system about the current validity of
ID 9944 and displays a warning message if it is not currently active:
% auditreduce -O /etc/security/audit_suspect/user9944 -u 9944
To get an audit log of only the global zone:
% auditreduce -z global
location of audit trails, when stored
See attributes(5) for descriptions of the following attributes:
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
│Availability │SUNWcsu │
│Interface Stability │See below. │
The command invocation is Stable. The binary file format is Stable. The
binary file contents is Unstable.
bsmconv(1M), praudit(1M), audit.log(4), audit_class(4), audit_con‐
trol(4), group(4), hosts(4), passwd(4), attributes(5), smf(5)
See the section on Solaris Auditing in System Administration Guide:
auditreduce displays error messages if there are command line errors
and then exits. If there are fatal errors during the run, auditreduce
displays an explanatory message and exits. In this case, the output
file might be in an inconsistent state (no trailer or partially written
record) and auditreduce displays a warning message before exiting. Suc‐
cessful invocation returns 0 and unsuccessful invocation returns 1.
Since auditreduce might be processing a large number of input files, it
is possible that the machine-wide limit on open files will be exceeded.
If this happens, auditreduce displays a message to that effect, give
information on how many file there are, and exit.
If auditreduce displays a record's timestamp in a diagnostic message,
that time is in local time. However, when filenames are displayed,
their timestamps are in GMT.
Conjunction, disjunction, negation, and grouping of record selection
options should be allowed.
The functionality described in this man page is available only if the
Solaris Auditing has been enabled. See bsmconv(1M) for more informa‐
The -z option should be used only if the audit policy zonename is set.
If there is no zonename token, then no records will be selected.
SunOS 5.11 10 Apr 2006 auditreduce(1M)