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 .

IEEE/The Open Group                                   2003                                              UNGET(P)