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QSIG(1P)                   POSIX Programmer's Manual                  QSIG(1P)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (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 pre-
       sented 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 num-
       ber.

       If  the  -s option is not presented to the qsig utility, the utility shall send the signal SIGTERM to each sig-
       naled 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  prece-
              dence 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  exam-
              ple, 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 writ-
              ten 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  attempt-
       ing 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 rea-
       sons. 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, Stan-
       dard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base  Specifica-
       tions  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 Stan-
       dard,  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                             QSIG(1P)