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NAME
qselect - select batch jobs
SYNOPSIS
qselect [-a [op]date_time][-A account_string][-c [op]interval]
[-h hold_list][-l resource_list][-N name][-p [op]priority]
[-q destination][-r y|n][-s states][-u user_list]
DESCRIPTION
To select a set of batch jobs is to return the batch job_identifiers for each batch job that meets a list
of selection criteria. A set of batch jobs is selected by a request to a batch server. The qselect
utility is a user-accessible batch client that requests the selection of batch jobs.
Upon successful completion, the qselect utility shall have returned a list of zero or more batch
job_identifiers that meet the criteria specified by the options and option-arguments presented to the
utility.
The qselect utility shall select batch jobs by sending a Select Jobs Request to a batch server. The
qselect utility shall not exit until the server replies to each request generated.
For each option presented to the qselect utility, the utility shall restrict the set of selected batch
jobs as described in the OPTIONS section.
The qselect utility shall not restrict selection of batch jobs except by authorization and as required by
the options presented to the utility.
When an option is specified with a mandatory or optional op component to the option-argument, then op
shall specify a relation between the value of a certain batch job attribute and the value component of
the option-argument. If an op is allowable on an option, then the description of the option letter
indicates the op as either mandatory or optional. Acceptable strings for the op component, and the
relation the string indicates, are shown in the following list:
.eq. The value represented by the attribute of the batch job is equal to the value represented by the
option-argument.
.ge. The value represented by the attribute of the batch job is greater than or equal to the value
represented by the option-argument.
.gt. The value represented by the attribute of the batch job is greater than the value represented by
the option-argument.
.lt. The value represented by the attribute of the batch job is less than the value represented by the
option-argument.
.le. The value represented by the attribute of the batch job is less than or equal to the value
represented by the option-argument.
.ne. The value represented by the attribute of the batch job is not equal to the value represented by
the option-argument.
OPTIONS
The qselect utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, Section 12.2,
Utility Syntax Guidelines.
The following options shall be supported by the implementation:
-a [op]date_time
Restrict selection to a specific time, or a range of times.
The qselect utility shall select only batch jobs for which the value of the Execution_Time attribute is
related to the Epoch equivalent of the local time expressed by the value of the date_time component of
the option-argument in the manner indicated by the value of the op component of the option-argument.
The qselect utility shall accept a date_time component of the option-argument that conforms to the syntax
of the time operand of the touch utility.
If the op component of the option-argument is not presented to the qselect utility, the utility shall
select batch jobs for which the Execution_Time attribute is equal to the date_time component of the
option-argument.
When comparing times, the qselect utility shall use the following definitions for the op component of the
option-argument:
.eq.
The time represented by value of the Execution_Time attribute of the batch job is equal to the
time represented by the date_time component of the option-argument.
.ge.
The time represented by value of the Execution_Time attribute of the batch job is after or equal
to the time represented by the date_time component of the option-argument.
.gt.
The time represented by value of the Execution_Time attribute of the batch job is after the time
represented by the date_time component of the option-argument.
.lt.
The time represented by value of the Execution_Time attribute of the batch job is before the time
represented by the date_time component of the option-argument.
.le.
The time represented by value of the Execution_Time attribute of the batch job is before or equal
to the time represented by the date_time component of the option-argument.
.ne.
The time represented by value of the Execution_Time attribute of the batch job is not equal to the
time represented by the date_time component of the option-argument.
The qselect utility shall accept the defined character strings for the op component of the option-
argument.
-A account_string
Restrict selection to the batch jobs charging a specified account.
The qselect utility shall select only batch jobs for which the value of the Account_Name attribute of the
batch job matchs the value of the account_string option-argument.
The syntax of the account_string option-argument is unspecified.
-c [op]interval
Restrict selection to batch jobs within a range of checkpoint intervals.
The qselect utility shall select only batch jobs for which the value of the Checkpoint attribute relates
to the value of the interval component of the option-argument in the manner indicated by the value of the
op component of the option-argument.
If the op component of the option-argument is omitted, the qselect utility shall select batch jobs for
which the value of the Checkpoint attribute is equal to the value of the interval component of the
option-argument.
When comparing checkpoint intervals, the qselect utility shall use the following definitions for the op
component of the option-argument:
.eq.
The value of the Checkpoint attribute of the batch job equals the value of the interval component
of the option-argument.
.ge.
The value of the Checkpoint attribute of the batch job is greater than or equal to the value of
the interval component option-argument.
.gt.
The value of the Checkpoint attribute of the batch job is greater than the value of the interval
component option-argument.
.lt.
The value of the Checkpoint attribute of the batch job is less than the value of the interval
component option-argument.
.le.
The value of the Checkpoint attribute of the batch job is less than or equal to the value of the
interval component option-argument.
.ne.
The value of the Checkpoint attribute of the batch job does not equal the value of the interval
component option-argument.
The qselect utility shall accept the defined character strings for the op component of the option-
argument.
The ordering relationship for the values of the interval option-argument is defined to be:
`n' .gt. `s' .gt. `c=minutes' .ge. `c'
When comparing Checkpoint attributes with an interval having the value of the single character 'u' , only
equality or inequality are valid comparisons.
-h hold_list
Restrict selection to batch jobs that have a specific type of hold.
The qselect utility shall select only batch jobs for which the value of the Hold_Types attribute matches
the value of the hold_list option-argument.
The qselect -h option shall accept a value for the hold_list option-argument that is a string of
alphanumeric characters in the portable character set (see the Base Definitions volume of
IEEE Std 1003.1-2001, Section 6.1, Portable Character Set).
The qselect utility shall accept a value for the hold_list option-argument that is a string of one or
more of the characters 'u' , 's' , or 'o' , or the single character 'n' .
Each unique character in the hold_list option-argument of the qselect utility is defined as follows, each
representing a different hold type:
u
USER
s
SYSTEM
o
OPERATOR
If any of these characters are duplicated in the hold_list option-argument, the duplicates shall be
ignored.
The qselect utility shall consider it an error if any hold type other than 'n' is combined with hold type
'n' .
Strictly conforming applications shall not repeat any of the characters 'u' , 's' , 'o' , or 'n' within
the hold_list option-argument. The qselect utility shall permit the repetition of characters, but shall
not assign additional meaning to the repeated characters.
An implementation may define other hold types. The conformance document for an implementation shall
describe any additional hold types, how they are specified, their internal behavior, and how they affect
the behavior of the utility.
-l resource_list
Restrict selection to batch jobs with specified resource limits and attributes.
The qselect utility shall accept a resource_list option-argument with the following syntax:
resource_name op value [,,resource_name op value,, ...]
When comparing resource values, the qselect utility shall use the following definitions for the op
component of the option-argument:
.eq.
The value of the resource of the same name in the Resource_List attribute of the batch job equals
the value of the value component of the option-argument.
.ge.
The value of the resource of the same name in the Resource_List attribute of the batch job is
greater than or equal to the value of the value component of the option-argument.
.gt.
The value of the resource of the same name in the Resource_List attribute of the batch job is
greater than the value of the value component of the option-argument.
.lt.
The value of the resource of the same name in the Resource_List attribute of the batch job is less
than the value of the value component of the option-argument.
.ne.
The value of the resource of the same name in the Resource_List attribute of the batch job does
not equal the value of the value component of the option-argument.
.le.
The value of the resource of the same name in the Resource_List attribute of the batch job is less
than or equal to the value of the value component of the option-argument.
When comparing the limit of a Resource_List attribute with the value component of the option-argument, if
the limit, the value, or both are non-numeric, only equality or inequality are valid comparisons.
The qselect utility shall select only batch jobs for which the values of the resource_names listed in the
resource_list option-argument match the corresponding limits of the Resource_List attribute of the batch
job.
Limits of resource_names present in the Resource_List attribute of the batch job that have no
corresponding values in the resource_list option-argument shall not be considered when selecting batch
jobs.
-N name
Restrict selection to batch jobs with a specified name.
The qselect utility shall select only batch jobs for which the value of the Job_Name attribute matches
the value of the name option-argument. The string specified in the name option-argument shall be passed,
uninterpreted, to the server. This allows an implementation to match "wildcard" patterns against batch
job names.
An implementation shall describe in the conformance document the format it supports for matching against
the Job_Name attribute.
-p [op]priority
Restrict selection to batch jobs of the specified priority or range of priorities.
The qselect utility shall select only batch jobs for which the value of the Priority attribute of the
batch job relates to the value of the priority component of the option-argument in the manner indicated
by the value of the op component of the option-argument.
If the op component of the option-argument is omitted, the qselect utility shall select batch jobs for
which the value of the Priority attribute of the batch job is equal to the value of the priority
component of the option-argument.
When comparing priority values, the qselect utility shall use the following definitions for the op
component of the option-argument:
.eq.
The value of the Priority attribute of the batch job equals the value of the priority component of
the option-argument.
.ge.
The value of the Priority attribute of the batch job is greater than or equal to the value of the
priority component option-argument.
.gt.
The value of the Priority attribute of the batch job is greater than the value of the priority
component option-argument.
.lt.
The value of the Priority attribute of the batch job is less than the value of the priority
component option-argument.
.lt.
The value of the Priority attribute of the batch job is less than or equal to the value of the
priority component option-argument.
.ne.
The value of the Priority attribute of the batch job does not equal the value of the priority
component option-argument.
-q destination
Restrict selection to the specified batch queue or server, or both.
The qselect utility shall select only batch jobs that are located at the destination indicated by the
value of the destination option-argument.
The destination defines a batch queue, a server, or a batch queue at a server.
The qselect utility shall accept an option-argument for the -q option that conforms to the syntax for a
destination. If the -q option is not presented to the qselect utility, the utility shall select batch
jobs from all batch queues at the default batch server.
If the option-argument describes only a batch queue, the qselect utility shall select only batch jobs
from the batch queue of the specified name at the default batch server. The means by which qselect
determines the default server is implementation-defined.
If the option-argument describes only a batch server, the qselect utility shall select batch jobs from
all the batch queues at that batch server.
If the option-argument describes both a batch queue and a batch server, the qselect utility shall select
only batch jobs from the specified batch queue at the specified server.
-r y|n
Restrict selection to batch jobs with the specified rerunability status.
The qselect utility shall select only batch jobs for which the value of the Rerunable attribute of the
batch job matches the value of the option-argument.
The qselect utility shall accept a value for the option-argument that consists of either the single
character 'y' or the single character 'n' . The character 'y' represents the value TRUE, and the
character 'n' represents the value FALSE.
-s states
Restrict selection to batch jobs in the specified states.
The qselect utility shall accept an option-argument that consists of any combination of the characters
'e' , 'q' , 'r' , 'w' , 'h' , and 't' .
Conforming applications shall not repeat any character in the option-argument. The qselect utility shall
permit the repetition of characters in the option-argument, but shall not assign additional meaning to
repeated characters.
The qselect utility shall interpret the characters in the states option-argument as follows:
e
Represents the EXITING state.
q
Represents the QUEUED state.
r
Represents the RUNNING state.
t
Represents the TRANSITING state.
h
Represents the HELD state.
w
Represents the WAITING state.
For each character in the states option-argument, the qselect utility shall select batch jobs in the
corresponding state.
-u user_list
Restrict selection to batch jobs owned by the specified user names.
The qselect utility shall select only the batch jobs of those users specified in the user_list option-
argument.
The qselect utility shall accept a user_list option-argument that conforms to the following syntax:
username[@host][,,username[@host],, ...]
The qselect utility shall accept only one user name that is missing a corresponding host name. The
qselect utility shall accept only one user name per named host.
OPERANDS
None.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
The following environment variables shall affect the execution of qselect:
LANG Provide a default value for the internationalization variables that are unset or null. (See the
Base Definitions volume of IEEE Std 1003.1-2001, Section 8.2, Internationalization Variables for
the precedence of internationalization variables used to determine the values of locale
categories.)
LC_ALL If set to a non-empty string value, override the values of all the other internationalization
variables.
LC_CTYPE
Determine the locale for the interpretation of sequences of bytes of text data as characters (for
example, single-byte as opposed to multi-byte characters in arguments).
LC_MESSAGES
Determine the locale that should be used to affect the format and contents of diagnostic messages
written to standard error.
LOGNAME
Determine the login name of the user.
TZ Determine the timezone used to interpret the date-time option-argument. If TZ is unset or null,
an unspecified default timezone shall be used.
ASYNCHRONOUS EVENTS
Default.
STDOUT
The qselect utility shall write zero or more batch job_identifiers to standard output.
The qselect utility shall separate the batch job_identifiers written to standard output by white space.
The qselect utility shall write batch job_identifiers in the following format:
sequence_number.server_name@server
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
The following exit values shall be returned:
0 Successful completion.
>0 An error occurred.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
The following example shows how a user might use the qselect utility in conjunction with the qdel utility
to delete all of his or her jobs in the queued state without affecting any jobs that are already running:
qdel $(qselect -s q)
or:
qselect -s q || xargs qdel
RATIONALE
The qselect utility allows users to acquire a list of job identifiers that match user-specified selection
criteria. The list of identifiers returned by the qselect utility conforms to the syntax of the batch job
identifier list processed by a utility such as qmove, qdel, and qrls. The qselect utility is thus a
powerful tool for causing another batch system utility to act upon a set of jobs that match a list of
selection criteria.
The options of the qselect utility let the user apply a number of useful filters for selecting jobs. Each
option further restricts the selection of jobs. Many of the selection options allow the specification of
a relational operator. The FORTRAN-like syntax of the operator-that is, ".lt." - was chosen rather than
the C-like "<=" meta-characters.
The -a option allows users to restrict the selected jobs to those that have been submitted (or altered)
to wait until a particular time. The time period is determined by the argument of this option, which
includes both a time and an operator-it is thus possible to select jobs waiting until a specific time,
jobs waiting until after a certain time, or those waiting for a time before the specified time.
The -A option allows users to restrict the selected jobs to those that have been submitted (or altered)
to charge a particular account.
The -c option allows users to restrict the selected jobs to those whose checkpointing interval falls
within the specified range.
The -l option allows users to select those jobs whose resource limits fall within the range indicated by
the value of the option. For example, a user could select those jobs for which the CPU time limit is
greater than two hours.
The -N option allows users to select jobs by job name. For instance, all the parts of a task that have
been divided in parallel jobs might be given the same name, and thus manipulated as a group by means of
this option.
The -q option allows users to select jobs in a specified queue.
The -r option allows users to select only those jobs with a specified rerun criteria. For instance, a
user might select only those jobs that can be rerun for use with the qrerun utility.
The -s option allows users to select only those jobs that are in a certain state.
The -u option allows users to select jobs that have been submitted to execute under a particular account.
The selection criteria provided by the options of the qselect utility allow users to select jobs based on
all the appropriate attributes that can be assigned to jobs by the qsub utility.
Historically, the qselect utility has not been a part of existing practice; it is an improvement that has
been introduced in this volume of IEEE Std 1003.1-2001.
FUTURE DIRECTIONS
None.
SEE ALSO
qdel , qrerun , qrls , qselect , qsub , touch , Batch Environment Services
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,
Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The
original Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 QSELECT(P)