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Linux 2.6 - man page for qselect (linux section 1posix)

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 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 gener-
       ated.

       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-argu-
       ment,  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 rep-
	      resented 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 rep-
	      resented 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 con-
       forms 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-argu-
	      ment.

       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  defini-
       tions 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 char-
       acter '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 repeti-
       tion of characters, but shall not assign additional meaning to the repeated characters.

       An implementation may define other hold types. The conformance document for an implementa-
       tion  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  syn-
       tax:

	      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  implementa-
       tion 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 prior-
	      ity 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 indi-
       cated 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 util-
       ity 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  qse-
       lect  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  fol-
       lows:

       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 follow-
       ing 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, Inter-
	      nationalization 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  interna-
	      tionalization 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  argu-
	      ments).

       LC_MESSAGES
	      Determine the locale that should be used to affect the format and contents of diag-
	      nostic 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 con-
       forms 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 sys-
       tem 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  argu-
       ment  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 manip-
       ulated 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 par-
       ticular 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				       QSELECT(P)


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