проводить пакетные задания (hold batch jobs)
Пролог (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.
Имя (Name)
qhold — hold batch jobs
Синопсис (Synopsis)
qhold [-h hold_list] job_identifier...
Описание (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_identifier.
Параметры (Options)
The qhold utility shall conform to the Base Definitions volume of
POSIX.1‐2017, 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 volume of POSIX.1‐2017,
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 characters '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
following 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
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.
If the -h option is not presented to the qhold utility,
the implementation shall set the Hold_Types attribute
to USER.
Операнды (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 Identifier).
Стандартный ввод (Stdin)
Not used.
Входные файлы (Input files)
None.
Переменные окружения (Environment variables)
The following environment variables shall affect the execution of
qhold:
LANG Provide a default value for the internationalization
variables that are unset or null. (See the Base
Definitions volume of POSIX.1‐2017, Section 8.2,
Internationalization Variables 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.
Асинхронные события (Asynchronous events)
Default.
Стандартный вывод (Stdout)
None.
Стандартный вывод сообщений (Stderr)
The standard error shall be used only for diagnostic messages.
Выходные файлы (Output files)
None.
Расширенное описание (Extended description)
None.
Статус выхода (Exit)
The following exit values shall be returned:
0 Successful completion.
>0 An error occurred.
Последствия ошибок (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_identifier 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.
Использование в приложениях (Application usage)
None.
Примеры (Examples)
None.
Обоснование (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 distinct. 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.
Будущие направления (Future directions)
The qhold utility may be removed in a future version.
Смотри также (See also)
Chapter 3, Batch Environment Services, qselect(1p)
The Base Definitions volume of POSIX.1‐2017, Section 6.1,
Portable Character Set, Chapter 8, Environment Variables, Section
12.2, Utility Syntax Guidelines
