QDEL(P) POSIX Programmer's Manual QDEL(P)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.
NAMEqdel - delete batch jobs
SYNOPSISqdel 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 success‐
fully, 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 Vari‐
ables 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_identi‐
fier 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 avail‐
able. 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 exist‐
ing 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 possibil‐
ity 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)
