NAME¶

sccs — front end for the SCCS subsystem

SYNOPSIS¶

DESCRIPTION¶

Sccs is a front end to the SCCS programs that helps them mesh more cleanly with the rest of UNIX. It also includes the capability to run “set user id” to another user to provide additional protection (but see the section entitled BUGS).

Basically, sccs runs the command with the specified flags and args. Each argument is normally modified to be prepended with “SCCS/s.”.

Flags to be interpreted by the sccs program must be before the command argument. Flags to be passed to the actual SCCS program must come after the command argument. These flags are specific to the command and are discussed in the documentation for that command.

Besides the usual SCCS commands, several “pseudo-commands” can be issued. These are:

edit

Equivalent to “get -e”.

delget

Perform a delta on the named files and then get new versions. The new versions will have id keywords expanded, and will not be editable. The -m, -p, -r, -s, and -y flags will be passed to delta, and the -b, -c, -e, -i, -k, -l, -s, and -x flags will be passed to get.

deledit

Equivalent to delget except that the get phase includes the -e flag. This option is useful for making a checkpoint of your current editing phase. The same flags will be passed to delta as described above, and all the flags listed for get above except -e and -k are passed to edit.

create

Creates an SCCS file , taking the initial contents from the file of the same name. Any flags to admin are accepted. If the creation is successful, the files are renamed with a comma on the front. These should be removed when you are convinced that the SCCS files have been created successfully.

fix

Must be followed by a -r flag. This command essentially removes the named delta, but leaves you with a copy of the delta with the changes that were in it. It is useful for fixing small compiler bugs, etc. Since it doesn't leave audit trails, it should be used carefully.

clean

This routine removes everything from the current directory that can be recreated from SCCS files. It will not remove any files being edited. If the -b flag is given, branches are ignored in the determination of whether they are being edited; this is dangerous if you are keeping the branches in the same directory.

unedit

This is the opposite of an edit or a “get -e”. It should be used with extreme caution, since any changes you made since the get will be irretrievably lost.

info

Gives a listing of all files being edited. If the -b flag is given, branches (i.e., SID´s with two or fewer components) are ignored. If the -u flag is given (with an optional argument) then only files being edited by you (or the named user) are listed.

check

Like info except that nothing is printed if nothing is being edited, and a non-zero exit status is returned if anything is being edited. The intent is to have this included in an install entry in a makefile to insure that everything is included into the SCCS file before a version is installed.

tell

Gives a newline-separated list of the files being edited on the standard output. Takes the -b and -u flags like info and check.

diffs

Gives a diff listing between the current version of the program(s) you have out for editing and the versions in SCCS format. The -r, -c, -i, -x, and -t flags are passed to
get; the -l, -s, -e, -f, -h, -u, -n, -w, and -b options are passed to diff. The -a, -B, -d, -H, -p, -q, -s, -v, and -y options are passed to diff but these options are (usually) specific to GNU diff, and so may not be supported on systems other than GNU. The -C flag is passed to diff as -c.

print

This command prints out verbose information about the named files.

Certain commands (such as admin) 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.

--cssc

Returns a zero exit value (for the GNU version only). No other operation is performed. This flag is used by the test suite to determine if it needs to use the --prefix flag in order to find the correct subprograms (non-GNU versions of sccs have the full pathnames for the subprograms hard-coded). In this way, the CSSC test suite can be compiled ready for installation in a particular directory, but the test suite can still be run before the suite has been installed in its final position. This option is supported only by the GNU version of sccs.

--prefix=foo

Uses foo as the prefix for SCCS sub-commands. The default prefix is compiled into the program and is usually “/usr/sccs”. You can discover the prefix setting with the -V flag. This prefix is used without a final slash being appended, so values like “/usr/local/bin/cssc-” can be used. This option is disallowed if the program is installed setuid, and it is supported only by the GNU version of sccs. This option is not equivalent to the -p flag.

--version

Show version information; synonymous with the -V flag.

-r

Runs sccs as the real user rather than as whatever effective user sccs is “set user id” to.

-d

Specifies a root directory for the SCCS files. The default is the current directory. If environment variable PROJECTDIR is set, it will be used to determine the -d flag.

-p

Defines the pathname of the directory in which the SCCS files will be found; “SCCS” is the default. The -p flag differs from the -d flag in that the -d argument is prepended to the entire pathname and the -p argument is inserted before the final component of the pathname. For example, “sccs -d/x -py get a/b” will convert to “get /x/a/y/s.b”. The intent here is to create aliases such as “alias syssccs sccs -d/usr/src” which will be used as “syssccs get cmd/who.c”. Please note that the -p flag is (very) different in purpose from the --prefix option.

-T

This flag causes the program to emit a debugging trace on stdout. This flag may be disabled at compile time.

-V

Shows the version information for the sccs program, and the subcommand prefix being used. This option is supported only by the GNU version of sccs.

EXAMPLES¶

To get a file for editing, edit it, and produce a new delta:

To get a file from another directory:

or

To make a delta of a large number of files in the current directory:

To get a list of files being edited that are not on branches:

To delta everything being edited by you:

In a makefile, to get source files from an SCCS file if it does not already exist:

MAINTAINER¶

This version of sccs is maintained by James Youngman, <jay@gnu.org>.

ENVIRONMENT¶

PROJECTDIR

The PROJECTDIR environment variable is checked by the -d flag. If it begins with a slash, it is taken directly; otherwise, the home directory of a user of that name is examined for a subdirectory “src” or “source”. If such a directory is found, it is used.

DIAGNOSTICS¶

There are many error messages, mostly brief but fairly obvious. If all goes acording to plan, the program's exit status is zero. Otherwise, it will be one of the following values:-

0

No error; everything proceeded according to plan.

64

Command line usage error

69

Could not exec program

70

Internal software error. This should not happen.

71

System error (e.g., can't fork)

75

Temporary failure; retry later. This error is returned when the system runs out of memory.

77

Permission denied. This error occurs when the program has been installed setuid, but SCCSDIR was not configured in at compile time. This can also happen if something goes wrong when the program tries to drop its setuid or setgid privileges. When a program exits due to a fatal signal, the shell usually adds 128 to the signal number and uses that as the return value. Some systems also produce values in this range if there was a problem with the dynamic linker.

SEE ALSO¶

what(1), sccs-admin(1), sccs-cdc(1), sccs-comb(1), sccs-delta(1), sccs-get(1), sccs-help(1), sccs-prs(1), sccs-prt(1), sccs-rmchg(1), sccs-rmdel(1), sccs-sact(1), sccsdiff(1), sccs-unget(1), sccs-val(1), make(1), rcsintro(1), cvs(1), sccsfile(5).

Eric Allman, An Introduction to the Source Code Control System.

James Youngman, CSSC: Compatibly Stupid Source Control.

COPYING¶

Copyright © 1998
Free Software Foundation, Inc. All rights reserved.

Copyright © 1983, 1990, 1993
The Regents of the University of California. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this software must display the following acknowledgement:

   This product includes software developed by the University of California, Berkeley and its contributors.

4. Neither the name of the University nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

HISTORY¶

The sccs command appeared in 4.3BSD.

This version of sccs has been slightly modified to support GNU Autoconf, and several new options (those beginning with two dashes and also -V) and to make it somewhat more portable. The program otherwise remains largely unchanged.

BUGS¶

It should be able to take directory arguments on pseudo-commands like the SCCS commands do.

Though this program is mostly derived from the original BSD code, the subprograms accompanying it in the CSSC suite (admin, get, delta and so on) are not the original AT&T code. Please do not count on these programs being secure.

Other known bugs are listed in the file BUGS, which accompanies GNU CSSC.