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.TH QDEL "1P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"

.SH 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.

.SH NAME

qdel

\(em delete batch jobs

.SH SYNOPSIS

.LP

.nf

qdel \fIjob_identifier\fP...

.fi

.SH 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.

.P

The

.IR qdel

utility is a user-accessible client of batch services that requests the

deletion of one or more batch jobs.

.P

The

.IR qdel

utility shall request a batch server to delete those batch jobs for

which a batch

.IR job_identifier

is presented to the utility.

.P

The

.IR qdel

utility shall delete batch jobs in the order in which their batch

.IR job_identifier s

are presented to the utility.

.P

If the

.IR qdel

utility fails to process any batch

.IR job_identifier

successfully, the utility shall proceed to process the remaining batch

.IR job_identifier s,

if any.

.P

The

.IR qdel

utility shall delete each batch job by sending a

.IR "Delete Job Request"

to the batch server that manages the batch job.

.P

The

.IR qdel

utility shall not exit until the batch job corresponding to each

successfully processed batch

.IR job_identifier

has been deleted.

.SH OPTIONS

None.

.SH OPERANDS

The

.IR qdel

utility shall accept one or more operands that conform to the syntax

for a batch

.IR job_identifier

(see

.IR "Section 3.3.1" ", " "Batch Job Identifier").

.SH STDIN

Not used.

.SH "INPUT FILES"

None.

.SH "ENVIRONMENT VARIABLES"

The following environment variables shall affect the execution of

.IR qdel :

.IP "\fILANG\fP" 10

Provide a default value for the internationalization variables that are

unset or null. (See the Base Definitions volume of POSIX.1\(hy2008,

.IR "Section 8.2" ", " "Internationalization Variables"

the precedence of internationalization variables used to determine the

values of locale categories.)

.IP "\fILC_ALL\fP" 10

If set to a non-empty string value, override the values of all the

other internationalization variables.

.IP "\fILC_CTYPE\fP" 10

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).

.IP "\fILC_MESSAGES\fP" 10

.br

Determine the locale that should be used to affect the format and

contents of diagnostic messages written to standard error.

.IP "\fILOGNAME\fP" 10

Determine the login name of the user.

.SH "ASYNCHRONOUS EVENTS"

Default.

.SH STDOUT

An implementation of the

.IR qdel

utility may write informative messages to standard output.

.SH STDERR

The standard error shall be used only for diagnostic messages.

.SH "OUTPUT FILES"

None.

.SH "EXTENDED DESCRIPTION"

None.

.SH "EXIT STATUS"

The following exit values shall be returned:

.IP "\00" 6

Successful completion.

.IP >0 6

An error occurred.

.SH "CONSEQUENCES OF ERRORS"

In addition to the default behavior, the

.IR 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

.IR job_identifier

does not exist on the server. Whether or not the

.IR qdel

utility waits to output the diagnostic message while attempting to

locate the job on other servers is implementation-defined.

.LP

.IR "The following sections are informative."

.SH "APPLICATION USAGE"

None.

.SH EXAMPLES

None.

.SH RATIONALE

The

.IR qdel

utility allows users and administrators to delete jobs.

.P

The

.IR qdel

utility provides functionality that is not otherwise available. For

example, the

.IR kill

utility of the operating system does not suffice. First, to use the

.IR kill

utility, the user might have to log in on a remote node, because the

.IR kill

utility does not operate across the network. Second, unlike

.IR qdel ,

.IR kill

cannot remove jobs from queues. Lastly, the arguments of the

.IR qdel

utility are job identifiers rather than process identifiers, and so

this utility can be passed the output of the

.IR qselect

utility, thus providing users with a means of deleting a list of jobs.

.P

Because a set of jobs can be selected using the

.IR qselect

utility, the

.IR 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.

.P

Historically, the

.IR qdel

utility has been a component of NQS, the existing practice on which it

is based. However, the

.IR qdel

utility defined in this volume of POSIX.1\(hy2008 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

.IR qsig

utility.

.P

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.

.SH "FUTURE DIRECTIONS"

The

.IR qdel

utility may be removed in a future version.

.SH "SEE ALSO"

.IR "Chapter 3" ", " "Batch Environment Services",

.IR "\fIkill\fR\^",

.IR "\fIqselect\fR\^",

.IR "\fIqsig\fR\^"

.P

The Base Definitions volume of POSIX.1\(hy2008,

.IR "Chapter 8" ", " "Environment Variables"

.SH COPYRIGHT

Portions of this text are reprinted and reproduced in electronic form

from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology

-- Portable Operating System Interface (POSIX), The Open Group Base

Specifications Issue 7, Copyright (C) 2013 by the Institute of

Electrical and Electronics Engineers, Inc and The Open Group.

(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .

Any typographical or formatting errors that appear

in this page are most likely

to have been introduced during the conversion of the source files to

man page format. To report such errors, see

https://www.kernel.org/doc/man-pages/reporting_bugs.html .