NAME
sccs - front end for the SCCS subsystem (DEVELOPMENT)
SYNOPSIS
sccs [-r][-d path][-p path] command [options...][operands...]
DESCRIPTION
The sccs utility is a front end to the SCCS programs. It also includes
the capability to run set-user-id to another user to provide additional
protection.
The sccs utility shall invoke the specified command with the specified
options and operands. By default, each of the operands shall be
modified by prefixing it with the string "SCCS/s." .
The command can be the name of one of the SCCS utilities in this volume
of IEEE Std 1003.1-2001 ( admin, delta, get, prs, rmdel, sact, unget,
val, or what) or one of the pseudo-utilities listed in the EXTENDED
DESCRIPTION section.
OPTIONS
The sccs utility shall conform to the Base Definitions volume of
IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines, except
that options operands are actually options to be passed to the utility
named by command. When the portion of the command:
command [options ... ] [operands ... ]
is considered, all of the pseudo-utilities used as command shall
support the Utility Syntax Guidelines. Any of the other SCCS utilities
that can be invoked in this manner support the Guidelines to the extent
indicated by their individual OPTIONS sections.
The following options shall be supported preceding the command operand:
-d path
A pathname of a directory to be used as a root directory for the
SCCS files. The default shall be the current directory. The -d
option shall take precedence over the PROJECTDIR variable. See
-p.
-p path
A pathname of a directory in which the SCCS files are located.
The default shall be the SCCS directory.
The -p option differs from the -d option in that the -d option-argument
shall be prefixed to the entire pathname and the -p option-argument
shall be inserted before the final component of the pathname. For
example:
sccs -d /x -p y get a/b
converts to:
get /x/a/y/s.b
This allows the creation of aliases such as:
alias syssccs="sccs -d /usr/src"
which is used as:
syssccs get cmd/who.c
-r Invoke command with the real user ID of the process, not any
effective user ID that the sccs utility is set to. Certain
commands ( admin, check, clean, diffs, info, rmdel, and tell)
cannot be run set-user-ID by all users, since this would allow
anyone to change the authorizations. These commands are always
run as the real user.
OPERANDS
The following operands shall be supported:
command
An SCCS utility name or the name of one of the pseudo-utilities
listed in the EXTENDED DESCRIPTION section.
options
An option or option-argument to be passed to command.
operands
An operand to be passed to command.
STDIN
See the utility description for the specified command.
INPUT FILES
See the utility description for the specified command.
ENVIRONMENT VARIABLES
The following environment variables shall affect the execution of sccs:
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 .
PROJECTDIR
Provide a default value for the -d path option. If the value of
PROJECTDIR begins with a slash, it shall be considered an
absolute pathname; otherwise, the value of PROJECTDIR is treated
as a user name and that user’s initial working directory shall
be examined for a subdirectory src or source. If such a
directory is found, it shall be used. Otherwise, the value
shall be used as a relative pathname.
Additional environment variable effects may be found in the utility
description for the specified command.
ASYNCHRONOUS EVENTS
Default.
STDOUT
See the utility description for the specified command.
STDERR
See the utility description for the specified command.
OUTPUT FILES
See the utility description for the specified command.
EXTENDED DESCRIPTION
The following pseudo-utilities shall be supported as command operands.
All options referred to in the following list are values given in the
options operands following command.
check Equivalent to info, except that nothing shall be printed if
nothing is being edited, and a non-zero exit status shall be
returned if anything is being edited. The intent is to have this
included in an "install" entry in a makefile to ensure that
everything is included into the SCCS file before a version is
installed.
clean Remove everything from the current directory that can be
recreated from SCCS files, but do not remove any files being
edited. If the -b option is given, branches shall be ignored in
the determination of whether they are being edited; this is
dangerous if branches are kept in the same directory.
create Create an SCCS file, taking the initial contents from the file
of the same name. Any options to admin are accepted. If the
creation is successful, the original files shall be renamed by
prefixing the basenames with a comma. These renamed files should
be removed after it has been verified that the SCCS files have
been created successfully.
delget Perform a delta on the named files and then get new versions.
The new versions shall have ID keywords expanded and shall not
be editable. Any -m, -p, -r, -s, and -y options shall be passed
to delta, and any -b, -c, -e, -i, -k, -l, -s, and -x options
shall be passed to get.
deledit
Equivalent to delget, except that the get phase shall include
the -e option. This option is useful for making a checkpoint of
the current editing phase. The same options shall be passed to
delta as described above, and all the options listed for get
above except -e shall be passed to edit.
diffs Write a difference listing between the current version of the
files checked out for editing and the versions in SCCS format.
Any -r, -c, -i, -x, and -t options shall be passed to get; any
-l, -s, -e, -f, -h, and -b options shall be passed to diff. A -C
option shall be passed to diff as -c.
edit Equivalent to get -e.
fix Remove the named delta, but leave a copy of the delta with the
changes that were in it. It is useful for fixing small compiler
bugs, and so on. The application shall ensure that it is
followed by a -r SID option. Since fix does not leave audit
trails, it should be used carefully.
info Write a listing of all files being edited. If the -b option is
given, branches (that is, SIDs with two or fewer components)
shall be ignored. If a -u user option is given, then only files
being edited by the named user shall be listed. A -U option
shall be equivalent to -u< current user>.
print Write out verbose information about the named files, equivalent
to sccs prs.
tell Write a <newline>-separated list of the files being edited to
standard output. Takes the -b, -u, and -U options like info and
check.
unedit This is the opposite of an edit or a get -e. It should be used
with caution, since any changes made since the get are lost.
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
Many of the SCCS utilities take directory names as operands as well as
specific filenames. The pseudo-utilities supported by sccs are not
described as having this capability, but are not prohibited from doing
so.
EXAMPLES
1. To get a file for editing, edit it and produce a new delta:
sccs get -e file.c
ex file.c
sccs delta file.c
2. To get a file from another directory:
sccs -p /usr/src/sccs/s. get cc.c
or:
sccs get /usr/src/sccs/s.cc.c
3. To make a delta of a large number of files in the current
directory:
sccs delta *.c
4. To get a list of files being edited that are not on branches:
sccs info -b
5. To delta everything being edited by the current user:
sccs delta $(sccs tell -U)
6. In a makefile, to get source files from an SCCS file if it does not
already exist:
SRCS = <list of source files>
$(SRCS):
sccs get $(REL) $@
RATIONALE
SCCS and its associated utilities are part of the XSI Development
Utilities option within the XSI extension.
SCCS is an abbreviation for Source Code Control System. It is a
maintenance and enhancement tracking tool. When a file is put under
SCCS, the source code control system maintains the file and, when
changes are made, identifies and stores them in the file with the
original source code and/or documentation. As other changes are made,
they too are identified and retained in the file.
Retrieval of the original and any set of changes is possible. Any
version of the file as it develops can be reconstructed for inspection
or additional modification. History data can be stored with each
version, documenting why the changes were made, who made them, and when
they were made.
FUTURE DIRECTIONS
None.
SEE ALSO
admin , delta , get , make , prs , rmdel , sact , unget , val , what
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 .