2004-11-03 13:51:07 +00:00
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.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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2007-06-20 22:33:04 +00:00
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.TH "QDEL" 1P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.\" qdel
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2007-09-20 06:03:25 +00:00
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.SH PROLOG
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This manual page is part of the POSIX Programmer's Manual.
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The Linux implementation of this interface may differ (consult
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the corresponding Linux manual page for details of Linux behavior),
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or the interface may not be implemented on Linux.
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2004-11-03 13:51:07 +00:00
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.SH NAME
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qdel \- delete batch jobs
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.SH SYNOPSIS
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.LP
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\fBqdel\fP \fIjob_identifier\fP \fB... \fP
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.SH DESCRIPTION
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.LP
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A batch job is deleted by sending a request to the batch server that
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manages the batch job. A batch job that has been deleted is
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no longer subject to management by batch services.
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.LP
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The \fIqdel\fP utility is a user-accessible client of batch services
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that requests the deletion of one or more batch jobs.
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.LP
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The \fIqdel\fP utility shall request a batch server to delete those
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batch jobs for which a batch \fIjob_identifier\fP is
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presented to the utility.
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.LP
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The \fIqdel\fP utility shall delete batch jobs in the order in which
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their batch \fIjob_identifier\fPs are presented to the
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utility.
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.LP
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If the \fIqdel\fP utility fails to process any batch \fIjob_identifier\fP
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successfully, the utility shall proceed to process
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the remaining batch \fIjob_identifier\fPs, if any.
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.LP
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The \fIqdel\fP utility shall delete each batch job by sending a \fIDelete
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Job Request\fP to the batch server that manages the
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batch job.
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.LP
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The \fIqdel\fP utility shall not exit until the batch job corresponding
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to each successfully processed batch
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\fIjob_identifier\fP has been deleted.
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.SH OPTIONS
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.LP
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None.
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.SH OPERANDS
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.LP
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The \fIqdel\fP utility shall accept one or more operands that conform
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to the syntax for a batch \fIjob_identifier\fP (see \fIBatch Job Identifier\fP
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).
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.SH STDIN
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.LP
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Not used.
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.SH INPUT FILES
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.LP
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None.
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.SH ENVIRONMENT VARIABLES
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.LP
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The following environment variables shall affect the execution of
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\fIqdel\fP:
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.TP 7
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\fILANG\fP
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Provide a default value for the internationalization variables that
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are unset or null. (See the Base Definitions volume of
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IEEE\ Std\ 1003.1-2001, Section 8.2, Internationalization Variables
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for
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the precedence of internationalization variables used to determine
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the values of locale categories.)
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.TP 7
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\fILC_ALL\fP
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If set to a non-empty string value, override the values of all the
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other internationalization variables.
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.TP 7
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\fILC_CTYPE\fP
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Determine the locale for the interpretation of sequences of bytes
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of text data as characters (for example, single-byte as
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opposed to multi-byte characters in arguments).
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.TP 7
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\fILC_MESSAGES\fP
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Determine the locale that should be used to affect the format and
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contents of diagnostic messages written to standard
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error.
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.TP 7
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\fILOGNAME\fP
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Determine the login name of the user.
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.sp
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.SH ASYNCHRONOUS EVENTS
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.LP
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Default.
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.SH STDOUT
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.LP
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An implementation of the \fIqdel\fP utility may write informative
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messages to standard output.
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.SH STDERR
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.LP
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The standard error shall be used only for diagnostic messages.
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.SH OUTPUT FILES
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.LP
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None.
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.SH EXTENDED DESCRIPTION
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.LP
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None.
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.SH EXIT STATUS
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.LP
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The following exit values shall be returned:
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.TP 7
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\ 0
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Successful completion.
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.TP 7
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>0
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An error occurred.
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.sp
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.SH CONSEQUENCES OF ERRORS
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.LP
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In addition to the default behavior, the \fIqdel\fP utility shall
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not be required to write a diagnostic message to standard
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error when the error reply received from a batch server indicates
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that the batch \fIjob_identifier\fP does not exist on the
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server. Whether or not the \fIqdel\fP utility waits to output the
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diagnostic message while attempting to locate the job on other
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servers is implementation-defined.
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.LP
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\fIThe following sections are informative.\fP
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.SH APPLICATION USAGE
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.LP
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None.
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.SH EXAMPLES
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.LP
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None.
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.SH RATIONALE
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.LP
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The \fIqdel\fP utility allows users and administrators to delete jobs.
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.LP
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The \fIqdel\fP utility provides functionality that is not otherwise
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available. For example, the \fIkill\fP utility of the operating system
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does not suffice. First, to use the \fIkill\fP utility, the user might
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have to log in on a remote node, because the \fIkill\fP utility does
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not operate across the network. Second, unlike \fIqdel\fP, \fIkill\fP
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cannot remove jobs from queues. Lastly, the arguments of the \fIqdel\fP
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utility are job
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identifiers rather than process identifiers, and so this utility can
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be passed the output of the \fIqselect\fP utility, thus providing
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users with a means of deleting a list of jobs.
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.LP
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Because a set of jobs can be selected using the \fIqselect\fP utility,
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the \fIqdel\fP
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utility has not been complicated with options that provide for selection
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of jobs. Instead, the batch jobs to be deleted are
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identified individually by their job identifiers.
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.LP
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Historically, the \fIqdel\fP utility has been a component of NQS,
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the existing practice on which it is based. However, the
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\fIqdel\fP utility defined in this volume of IEEE\ Std\ 1003.1-2001
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does not provide an option for specifying a signal
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number to send to the batch job prior to the killing of the process;
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that capability has been subsumed by the \fIqsig\fP utility.
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.LP
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A discussion was held about the delays of networking and the possibility
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that the batch server may never respond, due to a down
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router, down batch server, or other network mishap. The DESCRIPTION
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records this under the words "fails to process any job
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identifier". In the broad sense, the network problem is also an error,
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which causes the failure to process the batch job
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identifier.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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2007-09-20 06:36:16 +00:00
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\fIBatch Environment Services\fP, \fIkill\fP(), \fIqselect\fP,
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2004-11-03 13:51:07 +00:00
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\fIqsig\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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