QSELECT(1P) POSIX Programmer's Manual QSELECT(1P)
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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 spec-
ified 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 util-
ity.
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 descrip-
tion 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
POSIX.1-2008, 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 oper-
and 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 fol-
lowing definitions for the op component of the option-argu-
ment:
.eq. The time represented by value of the Execution_Time
attribute of the batch job is equal to the time rep-
resented 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 repre-
sented by the date_time component of the option-argu-
ment.
.lt. The time represented by value of the Execution_Time
attribute of the batch job is before the time repre-
sented by the date_time component of the option-argu-
ment.
.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
matches the value of the account_string option-argument.
The syntax of the account_string option-argument is unspeci-
fied.
-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 compo-
nent 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 inter-
val component option-argument.
.ne. The value of the Checkpoint attribute of the batch
job does not equal the value of the interval compo-
nent 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 vol-
ume of POSIX.1-2008, 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 char-
acters '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 confor-
mance document for an implementation shall describe any addi-
tional 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 lim-
its and attributes.
The qselect utility shall accept a resource_list option-argu-
ment 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-argu-
ment.
.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 des-
tination 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 qse-
lect 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 rerun-
ability 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-argu-
ment 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 con-
sists 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 repeti-
tion 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 qse-
lect:
LANG Provide a default value for the internationalization vari-
ables that are unset or null. (See the Base Definitions vol-
ume of POSIX.1-2008, Section 8.2, Internationalization Vari-
ables 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 use-
ful filters for selecting jobs. Each option further restricts the
selection of jobs. Many of the selection options allow the specifica-
tion of a relational operator. The FORTRAN-like syntax of the opera-
tor--that is, ".lt."--was chosen rather than the C-like "<=" meta-char-
acters.
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 exam-
ple, 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 cer-
tain 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 prac-
tice; it is an improvement that has been introduced in this volume of
POSIX.1-2008.
FUTURE DIRECTIONS
The qselect utility may be removed in a future version.
SEE ALSO
Chapter 3, Batch Environment Services, qdel, qrerun, qrls, qselect,
qsub, touch
The Base Definitions volume of POSIX.1-2008, Section 6.1, Portable
Character Set, Chapter 8, Environment Variables, Section 12.2, Utility
Syntax Guidelines
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri-
cal and Electronics Engineers, Inc and The Open Group. (This is
POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the source
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