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QSELECT(P)                 POSIX Programmer's Manual                QSELECT(P)

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
       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  compo-
       nent 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 qse-
       lect utility, the utility shall select batch jobs for which the  Execu-
       tion_Time  attribute is equal to the date_time component of the option-
       argument.

       When comparing times, the qselect utility shall use the following defi-
       nitions 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-argu-
              ment.

       .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-argu-
       ment 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-argu-
       ment  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-argu-
       ment, 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 qse-
       lect 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  fol-
       lowing 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  compo-
              nent 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, unin-
       terpreted, to the server. This allows an implementation to match "wild-
       card" 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 compo-
       nent of the option-argument.

       When comparing priority values, the qselect utility shall use the  fol-
       lowing 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-argu-
       ment.

       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  util-
       ity  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 util-
       ity 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  charac-
       ters 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  con-
       forms 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  variables
              that  are  unset  or  null.  (See the Base Definitions volume of
              IEEE Std 1003.1-2001, Section  8.2,  Internationalization  Vari-
              ables  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 time-
              zone 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 operator-
       that  is,  ".lt." - was chosen rather than the C-like "<=" meta-charac-
       ters.

       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
       IEEE Std 1003.1-2001.

FUTURE DIRECTIONS
       None.

SEE ALSO
       qdel  , qrerun , qrls , qselect , qsub , touch , Batch Environment Ser-
       vices

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)

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