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QSIG
Section: POSIX Programmer's Manual (1P)
Updated: 2003
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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
qsig - signal batch jobs
SYNOPSIS
qsig [-s signal] job_identifier
...
DESCRIPTION
To signal a batch job is to send a signal to the session leader of
the batch job. A batch job is signaled by sending a request
to the batch server that manages the batch job. The qsig utility
is a user-accessible batch client that requests the
signaling of a batch job.
The qsig utility shall signal those batch jobs for which a batch
job_identifier is presented to the utility. The
qsig utility shall not signal any batch jobs whose batch job_identifiers
are not presented to the utility.
The qsig utility shall signal batch jobs in the order in which
the corresponding batch job_identifiers are
presented to the utility. If the qsig utility fails to process
a batch job_identifier successfully, the utility shall
proceed to process the remaining batch job_identifiers, if any.
The qsig utility shall signal batch jobs by sending a Signal
Job Request to the batch server that manages the
batch job.
For each successfully processed batch job_identifier, the qsig
utility shall have received a completion reply to
each Signal Job Request sent to a batch server at the time the
utility exits.
OPTIONS
The qsig utility shall conform to the Base Definitions volume
of IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
The following option shall be supported by the implementation:
- -s signal
-
Define the signal to be sent to the batch job.
The qsig utility shall accept a signal option-argument
that is either a symbolic signal name or an unsigned
integer signal number (see the POSIX.1-1990 standard, Section 3.3.1.1).
The qsig utility shall accept signal names for which
the SIG prefix has been omitted.
If the signal option-argument is a signal name, the qsig
utility shall send that name.
If the signal option-argument is a number, the qsig utility
shall send the signal value represented by the
number.
If the -s option is not presented to the qsig utility,
the utility shall send the signal SIGTERM to each signaled
batch job.
OPERANDS
The qsig 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
qsig:
- 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 qsig 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 qsig 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 qsig utility waits to output the
diagnostic message while attempting to locate the batch job on
other servers is implementation-defined.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
None.
RATIONALE
The qsig utility allows users to signal batch jobs.
A user may be unable to signal a batch job with the kill utility
of the operating
system for a number of reasons. First, the process ID of the batch
job may be unknown to the user. Second, the processes of the
batch job may be on a remote node. However, by virtue of communication
between batch nodes, the qsig utility can arrange for
the signaling of a process.
Because a batch job that is not running cannot be signaled, and because
the signal may not terminate the batch job, the
qsig utility is not a substitute for the qdel utility.
The options of the qsig utility allow the user to specify the
signal that is to be sent to the batch job.
The -s option allows users to specify a signal by name or by
number, and thus override the default signal. The
POSIX.1-1990 standard defines signals by both name and number.
The qsig utility is a new utility, vis-a-vis existing
practice; it has been defined in this volume of
IEEE Std 1003.1-2001 in response to user-perceived shortcomings
in existing practice.
FUTURE DIRECTIONS
None.
SEE ALSO
Batch Environment Services, kill(), qdel
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 .
Index
- PROLOG
-
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- OPERANDS
-
- STDIN
-
- INPUT FILES
-
- ENVIRONMENT VARIABLES
-
- ASYNCHRONOUS EVENTS
-
- STDOUT
-
- STDERR
-
- OUTPUT FILES
-
- EXTENDED DESCRIPTION
-
- EXIT STATUS
-
- CONSEQUENCES OF ERRORS
-
- APPLICATION USAGE
-
- EXAMPLES
-
- RATIONALE
-
- FUTURE DIRECTIONS
-
- SEE ALSO
-
- COPYRIGHT
-
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