NAME

       unget - undo a previous get of an SCCS file (DEVELOPMENT)

SYNOPSIS

       unget [-ns][-r SID] file...

DESCRIPTION

       The unget utility shall reverse the effect of a get -e done prior to creating the intended
       new delta.

OPTIONS

       The unget 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:

       -r  SID
              Uniquely  identify  which  delta  is  no  longer  intended.  (This  would have been
              specified by get as the new delta.) The use of this option is necessary only if two
              or more outstanding get commands for editing on the same SCCS file were done by the
              same person (login name).

       -s     Suppress the writing to standard output of the intended delta's SID.

       -n     Retain the file that was obtained by get, which would normally be removed from  the
              current directory.

OPERANDS

       The following operands shall be supported:

       file   A  pathname  of  an  existing SCCS file or a directory. If file is a directory, the
              unget utility shall behave as though each file in the directory were specified as a
              named  file,  except  that  non-SCCS files (last component of the pathname does not
              begin with s.) and unreadable files shall be silently ignored.

       If exactly one file operand appears, and it is '-' , the standard  input  shall  be  read;
       each  line  of  the  standard  input  shall  be taken to be the name of an SCCS file to be
       processed.  Non-SCCS files and unreadable files shall be silently ignored.

STDIN

       The standard input shall be a text file used only when the file operand  is  specified  as
       '-' . Each line of the text file shall be interpreted as an SCCS pathname.

INPUT FILES

       Any SCCS files processed shall be files of an unspecified format.

ENVIRONMENT VARIABLES

       The following environment variables shall affect the execution of unget:

       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 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.

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

ASYNCHRONOUS EVENTS

       Default.

STDOUT

       The standard output shall consist of a line for each file, in the following format:

              "%s\n", <SID removed from file>

       If there is more than one named file or if a directory or standard input  is  named,  each
       pathname shall be written before each of the preceding lines:

              "\n%s:\n", <pathname>

STDERR

       The standard error shall be used only for diagnostic messages.

OUTPUT FILES

       Any  SCCS  files  updated  shall be files of an unspecified format. During processing of a
       file, a locking z-file, as described in get, and a q-file (a working copy of the  p-file),
       may be created and deleted. The p-file and g-file, as described in get, shall be deleted.

EXTENDED DESCRIPTION

       None.

EXIT STATUS

       The following exit values shall be returned:

        0     Successful completion.

       >0     An error occurred.

CONSEQUENCES OF ERRORS

       Default.

       The following sections are informative.

APPLICATION USAGE

       None.

EXAMPLES

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       delta , get , sact

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 .