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Linux 2.6 - man page for qmsg (linux section 1posix)

QMSG(P) 			    POSIX Programmer's Manual				  QMSG(P)

NAME
       qmsg - send message to batch jobs

SYNOPSIS
       qmsg [-E][-O] message_string job_identifier ...

DESCRIPTION
       To  send  a message to a batch job is to request that a server write a message string into
       one or more output files of the batch job. A message is sent to a batch job by  a  request
       to  the	batch  server  that  manages the batch job. The qmsg utility is a user-accessible
       batch client that requests the sending of messages to one or more batch jobs.

       The qmsg utility shall write messages into the files of batch jobs by sending a	Job  Mes-
       sage  Request  to  the batch server that manages the batch job. The qmsg utility shall not
       directly write the message into the files of the batch job.

       The qmsg utility shall send a Job Message Request for those batch  jobs,  and  only  those
       batch jobs, for which a batch job_identifier is presented to the utility.

       The  qmsg  utility  shall  send	Job Message Requests for batch jobs in the order in which
       their batch job_identifiers are presented to the utility.

       If the qmsg utility fails to process any batch job_identifier  successfully,  the  utility
       shall proceed to process the remaining batch job_identifiers, if any.

       The  qmsg  utility shall not exit before a Job Message Request has been sent to the server
       that manages the batch job that corresponds to each successfully processed batch job_iden-
       tifier.

OPTIONS
       The  qmsg  utility  shall  conform to the Base Definitions volume of IEEE Std 1003.1-2001,
       Section 12.2, Utility Syntax Guidelines.

       The following options shall be supported by the implementation:

       -E     Specify that the message is written to the standard error of each batch job.

       The qmsg utility shall write the message into the standard error of the batch job.

       -O     Specify that the message is written to the standard output of each batch job.

       The qmsg utility shall write the message into the standard output of the batch job.

       If neither the -O nor the -E option is presented to the qmsg utility,  the  utility  shall
       write  the  message  into an implementation-defined file. The conformance document for the
       implementation shall describe the name and location of the implementation-defined file. If
       both  the  -O and the -E options are presented to the qmsg utility, then the utility shall
       write the messages to both standard output and standard error.

OPERANDS
       The qmsg utility shall accept a minimum of two operands, message_string and  one  or  more
       batch job_identifiers.

       The  message_string  operand shall be the string to be written to one or more output files
       of the batch job followed by a <newline>. If the string contains <blank>s, then the appli-
       cation  shall ensure that the string is quoted. The message_string shall be encoded in the
       portable character set (see the Base Definitions volume of  IEEE Std 1003.1-2001,  Section
       6.1, Portable Character Set).

       All  remaining  operands  are batch job_identifiers 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 qmsg:

       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, Inter-
	      nationalization 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 interna-
	      tionalization 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 argu-
	      ments).

       LC_MESSAGES
	      Determine the locale that should be used to affect the format and contents of diag-
	      nostic messages written to standard error.

       LOGNAME
	      Determine the login name of the user.

ASYNCHRONOUS EVENTS
       Default.

STDOUT
       None.

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 qmsg 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
       qmsg utility waits to output the diagnostic message while attempting to locate the job  on
       other servers is implementation-defined.

       The following sections are informative.

APPLICATION USAGE
       None.

EXAMPLES
       None.

RATIONALE
       The  qmsg  utility  allows  users to write messages into the output files of running jobs.
       Users, including operators and administrators, have a number of occasions when  they  want
       to place messages in the output files of a batch job. For example, if a disk that is being
       used by a batch job is showing errors, the operator might note this in the standard  error
       stream of the batch job.

       The options of the qmsg utility provide users with the means of placing the message in the
       output stream of their choice.  The default output stream for the message-if the user does
       not  designate an output stream-is implementation-defined, since many implementations will
       provide, as an extension to this volume of IEEE Std 1003.1-2001, a log file that shows the
       history of utility execution.

       If  users wish to send a message to a set of jobs that meet a selection criteria, the qse-
       lect utility can be used to acquire the appropriate list of job identifiers.

       The -E option allows users to place the message in the standard error stream of the  batch
       job.

       The -O option allows users to place the message in the standard output stream of the batch
       job.

       Historically, the qmsg utility is an existing practice in the offerings	of  one  or  more
       implementors  of  an  NQS-derived  batch  system.  The utility has been found to be useful
       enough that it deserves to be included in this volume of IEEE Std 1003.1-2001.

FUTURE DIRECTIONS
       None.

SEE ALSO
       Batch Environment Services , qselect

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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					  QMSG(P)


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