PROLOG

       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.

NAME

       rmdel — remove a delta from an SCCS file (DEVELOPMENT)

SYNOPSIS

       rmdel -r SID file...

DESCRIPTION

       The  rmdel utility shall remove the delta specified by the SID from each named SCCS file. The delta to be
       removed shall be the most recent delta in its branch in the delta chain  of  each  named  SCCS  file.  In
       addition,  the  application shall ensure that the SID specified is not that of a version being edited for
       the purpose of making a delta; that is, if a p-file (see get) exists for the named  SCCS  file,  the  SID
       specified shall not appear in any entry of the p-file.

       Removal of a delta shall be restricted to:

        1. The user who made the delta

        2. The owner of the SCCS file

        3. The owner of the directory containing the SCCS file

OPTIONS

       The  rmdel  utility  shall  conform to the Base Definitions volume of POSIX.1‐2017, Section 12.2, Utility
       Syntax Guidelines.

       The following option shall be supported:

       -r SID    Specify the SCCS identification string (SID) of the delta to be deleted.

OPERANDS

       The following operand shall be supported:

       file      A pathname of an existing SCCS file or a directory. If file is a directory, the  rmdel  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 is 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

       The SCCS files shall be files of unspecified format.

ENVIRONMENT VARIABLES

       The following environment variables shall affect the execution of rmdel:

       LANG      Provide a default value for the internationalization variables that are unset or null. (See the
                 Base  Definitions  volume  of POSIX.1‐2017, 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

       Not used.

STDERR

       The standard error shall be used only for diagnostic messages.

OUTPUT FILES

       The SCCS files shall be files of unspecified format. During processing of a file, a temporary x-file,  as
       described in admin, may be created and deleted; a locking z-file, as described in get, may be created and
       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

       admin, delta, get, prs

       The  Base  Definitions  volume  of  POSIX.1‐2017, Chapter 8, Environment Variables, Section 12.2, Utility
       Syntax Guidelines

COPYRIGHT

       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                                         RMDEL(1POSIX)