This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface

       It may be useful to redirect standard output within the specified commands.

       Default.

       The job shall not be scheduled.

       Thefollowingsectionsareinformative.

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for  Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 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 .

       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 .

IEEE/The Open Group                                   2017                                         BATCH(1POSIX)

       The  batch  utility  shall  read  commands from standard input and schedule them for execution in a batch
       queue. It shall be the equivalent of the command:

           at -q b -m now

       where queue b is a special at queue, specifically for batch jobs. Batch jobs shall be  submitted  to  the
       batch  queue  with  no  time  constraints  and  shall  be  run  by  the system using algorithms, based on
       unspecified factors, that may vary with each invocation of batch.

       Users shall be permitted to use batch if their name appears in the file at.allow which is located  in  an
       implementation-defined  directory.  If that file does not exist, the file at.deny, which is located in an
       implementation-defined directory, shall be checked to determine whether the user shall be  denied  access
       to  batch.  If neither file exists, only a process with appropriate privileges shall be allowed to submit
       a job. If only at.deny exists and is empty, global usage shall be permitted.  The  at.allow  and  at.deny
       files shall consist of one user name per line.

       The following environment variables shall affect the execution of batch:

       LANG      Provide a default value for the internationalization variables that are unset or null. (See the
                 Base Definitions volume of POSIX.1‐2017, Section8.2, InternationalizationVariables  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 and input files).

       LC_MESSAGES
                 Determine the locale that should be used to  affect  the  format  and  contents  of  diagnostic
                 messages written to standard error and informative messages written to standard output.

       LC_TIME   Determine the format and contents for date and time strings written by batch.

       NLSPATH   Determine the location of message catalogs for the processing of LC_MESSAGES.

       SHELL     Determine the name of a command interpreter to be used to invoke the at-job. If the variable is
                 unset  or  null,  sh  shall  be  used.  If  it  is set to a value other than a name for sh, the
                 implementation shall do one of the following: use that shell; use sh; use the login shell  from
                 the  user  database;  any  of the preceding accompanied by a warning diagnostic about which was
                 chosen.

       TZ        Determine the timezone. The job shall be submitted for  execution  at  the  time  specified  by
                 timespec  or  -ttime  relative  to  the  timezone  specified  by the TZ variable. If timespec
                 specifies a timezone, it overrides TZ.  If timespec does not specify a timezone and TZ is unset
                 or null, an unspecified default timezone shall be used.

        1. This sequence can be used at a terminal:

               batch
               sort < file >outfile
               EOT

        2. This  sequence,  which  demonstrates  redirecting  standard  error  to a pipe, is useful in a command
           procedure (the sequence of output redirection specifications is significant):

               batch <<!
               diff file1 file2 2>&1 >outfile | mailx mygroup
               !

       The following exit values shall be returned:

        0    Successful completion.

       >0    An error occurred.

       None.

       None.

       The text files at.allow and at.deny, which are located  in  an  implementation-defined  directory,  shall
       contain  zero  or  more  user  names,  one per line, of users who are, respectively, authorized or denied
       access to the at and batch utilities.

       batch — schedule commands to be executed in a batch queue

       None.

       None.

       None.

       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.

       Early proposals described batch in a manner totally separated from at, even though the  historical  model
       treated  it  almost  as  a synonym for at-qb.  A number of features were added to list and control batch
       work separately from those in at.  Upon further reflection, it was decided that the benefit of  this  did
       not merit the change to the historical interface.

       The -m option was included on the equivalent at command because it is historical practice to mail results
       to  the  submitter,  even if all job-produced output is redirected. As explained in the RATIONALE for at,
       the now keyword submits  the  job  for  immediate  execution  (after  scheduling  delays),  despite  some
       historical systems where atnow would have been considered an error.

at

       The Base Definitions volume of POSIX.1‐2017, Chapter8, EnvironmentVariables

       The following shall be written to standard error when a job has been successfully submitted:

           "job %s at %s\n", at_job_id, <date>

       where date shall be equivalent in format to the output of:

           date +"%a %b %e %T %Y"

       The  date  and  time  written  shall  be  adjusted  so  that  they appear in the timezone of the user (as
       determined by the TZ variable).

       Neither this, nor warning messages concerning the selection of the command interpreter, are considered  a
       diagnostic that changes the exit status.

       Diagnostic messages, if any, shall be written to standard error.

       The  standard  input shall be a text file consisting of commands acceptable to the shell command language
       described in Chapter2, ShellCommandLanguage.

       When standard input is a terminal, prompts of  unspecified  format  for  each  line  of  the  user  input
       described in the STDIN section may be written to standard output.

batch