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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
qdel — delete batch jobs
SYNOPSIS
qdel job_identifier...
DESCRIPTION
A batch job is deleted by sending a request to the batch server that manages the batch
job. A batch job that has been deleted is no longer subject to management by batch
services.
The qdel utility is a user-accessible client of batch services that requests the deletion
of one or more batch jobs.
The qdel utility shall request a batch server to delete those batch jobs for which a batch
job_identifier is presented to the utility.
The qdel utility shall delete batch jobs in the order in which their batch job_identifiers
are presented to the utility.
If the qdel utility fails to process any batch job_identifier successfully, the utility
shall proceed to process the remaining batch job_identifiers, if any.
The qdel utility shall delete each batch job by sending a Delete Job Request to the batch
server that manages the batch job.
The qdel utility shall not exit until the batch job corresponding to each successfully
processed batch job_identifier has been deleted.
OPTIONS
None.
OPERANDS
The qdel 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).
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
The following environment variables shall affect the execution of qdel:
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.
ASYNCHRONOUS EVENTS
Default.
STDOUT
An implementation of the qdel utility may write informative messages to standard output.
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 qdel 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
qdel 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 qdel utility allows users and administrators to delete jobs.
The qdel utility provides functionality that is not otherwise available. For example, the
kill utility of the operating system does not suffice. First, to use the kill utility, the
user might have to log in on a remote node, because the kill utility does not operate
across the network. Second, unlike qdel, kill cannot remove jobs from queues. Lastly, the
arguments of the qdel utility are job identifiers rather than process identifiers, and so
this utility can be passed the output of the qselect utility, thus providing users with a
means of deleting a list of jobs.
Because a set of jobs can be selected using the qselect utility, the qdel utility has not
been complicated with options that provide for selection of jobs. Instead, the batch jobs
to be deleted are identified individually by their job identifiers.
Historically, the qdel utility has been a component of NQS, the existing practice on which
it is based. However, the qdel utility defined in this volume of POSIX.1‐2017 does not
provide an option for specifying a signal number to send to the batch job prior to the
killing of the process; that capability has been subsumed by the qsig utility.
A discussion was held about the delays of networking and the possibility that the batch
server may never respond, due to a down router, down batch server, or other network
mishap. The DESCRIPTION records this under the words ``fails to process any job
identifier''. In the broad sense, the network problem is also an error, which causes the
failure to process the batch job identifier.
FUTURE DIRECTIONS
The qdel utility may be removed in a future version.
SEE ALSO
Chapter 3, Batch Environment Services, kill, qselect, qsig
The Base Definitions volume of POSIX.1‐2017, Chapter 8, Environment Variables
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1-2017, Standard for Information Technology -- Portable Operating System Interface
(POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .
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