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 holdlist] jobidentifier ... 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 jobidentifier is presented to the utility. The qhold utility shall place holds on batch jobs in the order in which their batch jobidentifiers are presented to the utility. If the qhold utility fails to process any batch jobidentifier successfully, the utility shall proceed to process the remaining batch jobidentifiers, 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 jobiden‐ tifier. OPTIONS The qhold utility shall conform to the Base Definitions volume of
IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines. The following option shall be supported by the implementation:
-h holdlist Define the types of holds to be placed on the batch job.
The qhold -h option shall accept a value for the holdlist option-argu‐ ment that is a string of alphanumeric characters in the portable char‐
acter set (see the Base Definitions volume of IEEE Std 1003.1-2001, Section 6.1, Portable Character Set).
The qhold utility shall accept a value for the holdlist option-argu‐ ment 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 holdlist option-argument, the qhold utility shall add a value to the HoldTypes 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 holdlist option-argu‐ ment, the duplicates shall be ignored. An existing HoldTypes attribute can be cleared by the following hold type: n NOHOLD 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 holdlist 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 implementa‐ tion shall set the HoldTypes attribute to USER. OPERANDS The qhold utility shall accept one or more operands that conform to the syntax for a batch jobidentifier (see Batch Job Identifier ). 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 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.)
LCALL If set to a non-empty string value, override the values of all the other internationalization variables. LCCTYPE 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). LCMESSAGES 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 jobidenti‐ 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 None. SEE ALSO Batch Environment Services, qselect 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 QHOLD(1P)