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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 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 IEEE Std 1003.1-2001, Section 8.2, Internationalization 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 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 IEEE Std 1003.1-2001 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
None.
SEE ALSO
Batch Environment Services , kill() , qselect , qsig
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 QDEL(P)