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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 .