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 .