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QHOLD(1P)		   POSIX Programmer's Manual		     QHOLD(1P)

PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
       implementation of this interface may differ (consult the	 corresponding
       Linux  manual page for details of Linux behavior), or the interface may
       not be implemented on Linux.

NAME
       qhold — hold batch jobs

SYNOPSIS
       qhold [−h hold_list] job_identifier...

DESCRIPTION
       A hold is placed on a batch job by a request to the batch  server  that
       manages	the  batch  job. A batch job that has one or more holds is not
       eligible for execution. The qhold utility is a  user-accessible	client
       of  batch services that requests one or more types of hold to be placed
       on one or more batch jobs.

       The qhold utility shall place holds on those batch  jobs	 for  which  a
       batch job_identifier is presented to the utility.

       The qhold utility shall place holds on batch jobs in the order in which
       their batch job_identifiers are presented to the utility. If the	 qhold
       utility	fails  to  process  any batch job_identifier successfully, the
       utility shall proceed to process the remaining  batch  job_identifiers,
       if any.

       The qhold utility shall place holds on each batch job by sending a Hold
       Job Request to the batch server that manages the batch job.

       The qhold utility shall not exit until holds have been  placed  on  the
       batch  job corresponding to each successfully processed batch job_iden‐
       tifier.

OPTIONS
       The qhold utility shall conform	to  the	 Base  Definitions  volume  of
       POSIX.1‐2008, Section 12.2, Utility Syntax Guidelines.

       The following option shall be supported by the implementation:

       −h hold_list
		 Define the types of holds to be placed on the batch job.

		 The  qhold  −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 qhold 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'.

		 For each unique character in the  hold_list  option-argument,
		 the  qhold  utility  shall  add  a  value  to	the Hold_Types
		 attribute of the batch job 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.

		 An existing Hold_Types attribute can be cleared by  the  fol‐
		 lowing hold type:

		 n     NO_HOLD

		 The qhold 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 qhold 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.

		 If  the  −h option is not presented to the qhold utility, the
		 implementation shall set the Hold_Types attribute to USER.

OPERANDS
       The qhold utility shall accept one or more operands that conform to the
       syntax for a batch job_identifier (see Section 3.3.1, Batch Job Identi‐
       fier).

STDIN
       Not used.

INPUT FILES
       None.

ENVIRONMENT VARIABLES
       The following environment  variables  shall  affect  the	 execution  of
       qhold:

       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.

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       None.

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
       In addition to the default behavior, the qhold  utility	shall  not  be
       required to write a diagnostic message to standard error when the error
       reply received from a batch server indicates that the batch job_identi‐
       fier  does  not	exist  on the server. Whether or not the qhold utility
       waits to output the diagnostic message while attempting to  locate  the
       job on other servers is implementation-defined.

       The following sections are informative.

APPLICATION USAGE
       None.

EXAMPLES
       None.

RATIONALE
       The  qhold  utility allows users to place a hold on one or more jobs. A
       hold makes a batch job ineligible for execution.

       The qhold utility has options that allow the user to specify  the  type
       of  hold.   Should  the user wish to place a hold on a set of jobs that
       meet a selection criteria, such a list of jobs can  be  acquired	 using
       the qselect utility.

       The −h option allows the user to specify the type of hold that is to be
       placed on the job. This option allows for USER, SYSTEM,	OPERATOR,  and
       implementation-defined hold types. The USER and OPERATOR holds are dis‐
       tinct. The batch server that manages the batch job will verify that the
       user is authorized to set the specified hold for the batch job.

       Mail  is	 not  required on hold because the administrator has the tools
       and libraries to build this option if he or she wishes.

       Historically, the qhold utility has been a part of some existing	 batch
       systems, although it has not traditionally been a part of the NQS.

FUTURE DIRECTIONS
       The qhold utility may be removed in a future version.

SEE ALSO
       Chapter 3, Batch Environment Services, qselect

       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
       files to man page format. To report such errors,	 see  https://www.ker‐
       nel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group		     2013			     QHOLD(1P)
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