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Newsgroups: comp.sources.unix From: hammer@cs.purdue.edu (Adam Hammer) Subject: v25i086: rcs-5.6 - Revision Control System, V5.6, Part10/11 Sender: sources-moderator@pa.dec.com Approved: vixie@pa.dec.com Submitted-By: hammer@cs.purdue.edu (Adam Hammer) Posting-Number: Volume 25, Issue 86 Archive-Name: rcs-5.6/part10 #! /bin/sh # This is a shell archive. Remove anything before this line, then unpack # it by saving it into a file and typing "sh file". To overwrite existing # files, type "sh file -c". You can also feed this as standard input via # unshar, or by typing "sh <file", e.g.. If this archive is complete, you # will see the following message at the end: # "End of archive 10 (of 11)." # Contents: rcs.ps.part2 # Wrapped by vixie@cognition.pa.dec.com on Fri Dec 20 16:23:42 1991 PATH=/bin:/usr/bin:/usr/ucb ; export PATH if test -f 'rcs.ps.part2' -a "${1}" != "-c" ; then echo shar: Will not clobber existing file \"'rcs.ps.part2'\" else echo shar: Extracting \"'rcs.ps.part2'\" $63654 characters$ sed "s/^X//" >'rcs.ps.part2' <<'END_OF_FILE' X4313(the)S X4471(`strict)S X4740(locking)S X4176 V X720(feature')S X1069(discussed)S X1492(earlier)S X1786(may)S X1998(be)S X2133(disabled,)S X2532(provided)S X2928(that)S X3119(\256le)S X3288(protection)S X3734(is)S X3842(set)S X3994(such)S X4218(that)S X4409(only)S X4628(the)S X4791(owner)S X4356 V X720(may)S X927(write)S X1167(the)S X1324(RCS)S X1549(\256le.)S X1767(This)S X1980(has)S X2148(the)S X2305(e)S X2349 H X (f)show 10 -.5 mul h (f)show X10 R X2410(ect)S X2561(that)S X2746(only)S X2959(the)S X3116(owner)S X3400(can)S X3573(check-in)S X3951(revisions,)S X4372(and)S X4550(that)S X4734(no)S X4868(lock)S X4536 V X720(is)S X817(needed)S X1129(for)S X1275(doing)S X1533(so.)S X4752 V X970(As)S X1113(added)S X1383(protection,)S X1845(each)S X2059(RCS)S X2281(\256le)S X2441(contains)S X2806(an)S X2932(access)S X3218(list)S X3373(that)S X3556(speci\256es)S X3933(the)S X4088(users)S X4326(who)S X4531(may)S X4736(execute)S X4932 V X720(update)S X1019(operations.)S X1523(If)S X1622(an)S X1749(access)S X2036(list)S X2192(is)S X2292(empty,)S X2600(only)S X2811(normal)S X3127(UNIX)S X3408(\256le)S X3568(protection)S X4005(applies.)S X4375(Thus,)S X4632(the)S X4786(access)S X5112 V X720(list)S X878(is)S X980(useful)S X1259(for)S X1410(restricting)S X1851(the)S X2009(set)S X2156(of)S X2275(people)S X2577(who)S X2785(would)S X3071(otherwise)S X3495(have)S X3719(update)S X4021(permission.)S X4551(Just)S X4743(as)S X4862(with)S X5292 V X720(locking,)S X1077(the)S X1231(access)S X1517(list)S X1672(has)S X1837(no)S X1969(e)S X2013 H X (f)show 10 -.5 mul h (f)show X10 R X2074(ect)S X2222(on)S X2354(read-only)S X2768(operations)S X3216(such)S X3431(as)S X10 I X3546(co)S X10 R X3640(.)S X3727(This)S X3937(approach)S X4333(is)S X4431(consistent)S X4862(with)S X5472 V X720(the)S X872(UNIX)S X1151(philosophy)S X1626(of)S X1739(openness,)S X2160(which)S X2434(contributes)S X2908(to)S X3016(a)S X3090(productive)S X3547(software)S X3920(development)S X4466(environment.)S X5832 V X10 B X720(5.)S X855(Con\256guration)S X1486(Management)S X6048 V X10 R X970(The)S X1156(preceding)S X1580(sections)S X1933(described)S X2346(how)S X2549(RCS)S X2770(deals)S X3006(with)S X3215(revisions)S X3607(of)S X3722(individual)S X4160(components;)S X4703(this)S X4880(sec-)S X6228 V X720(tion)S X917(discusses)S X1330(how)S X1543(to)S X1662(handle)S X1969(con\256gurations.)S X2637(A)S X2749(con\256guration)S X3322(is)S X3429(a)S X3513(set)S X3664(of)S X3787(revisions,)S X4213(where)S X4496(each)S X4718(revision)S X6408 V X720(comes)S X1007(from)S X1233(a)S X1309(di)S X1387 H X (f)show 10 -.5 mul h (f)show X10 R X1448(erent)S X1679(revision)S X2033(group,)S X2323(and)S X2500(the)S X2655(revisions)S X3049(are)S X3203(selected)S X3557(according)S X3983(to)S X4094(a)S X4171(certain)S X4475(criterion.)S X4901(For)S X6588 V X720(example,)S X1121(in)S X1237(order)S X1485(to)S X1601(build)S X1845(a)S X1927(functioning)S X2426(compiler,)S X2844(the)S X3004(`right')S X3297(revisions)S X3696(from)S X3928(the)S X4088(scanner,)S X4454(the)S X4613(parser,)S X4918(the)S X6768 V X720(optimizer)S X1154(and)S X1349(the)S X1522(code)S X1761(generator)S X2188(must)S X2434(be)S X2579(combined.)S X3079(RCS,)S X3345(in)S X3475(conjunction)S X3999(with)S X4229(MAKE,)S X4600(provides)S X4996(a)S X6948 V X720(number)S X1055(of)S X1168(facilities)S X1542(to)S X1650(e)S X1694 H X (f)show 10 -.5 mul h (f)show X10 R X1755(ect)S X1901(a)S X1975(smooth)S X2300(selection.)S X7920 V XEP X%%Page: 11 12 BP X/slant 0 def X/height 1.000000 def X10 R X10 R X40 V X0(-)S X580 V X2767(- 11 -)S X900 V X10 B X720(5.1.)S X930(RCS)S X1160(Selection)S X1573(Functions)S X1152 V X10 I X720(Default)S X1050(selection)S X1332 V X10 R X970(During)S X1285(development,)S X1858(the)S X2012(usual)S X2255(selection)S X2642(criterion)S X3012(is)S X3111(to)S X3221(choose)S X3530(the)S X3684(latest)S X3928(revision)S X4283(of)S X4399(all)S X4532(components.)S X1512 V X970(The)S X10 I X1155(co)S X10 R X1279(command)S X1703(makes)S X1988(this)S X2163(selection)S X2548(by)S X2678(default.)S X3040(For)S X3209(example,)S X3602(the)S X3754(command)S X1692 V X10 I X1330(co)S X1484(*,v)S X1932 V X10 R X970(retrieves)S X1354(the)S X1517(latest)S X1769(revision)S X2132(on)S X2273(the)S X2437(default)S X2756(branch)S X3069(of)S X3194(each)S X3418(RCS)S X3650(\256le)S X3820(in)S X3940(the)S X4104(current)S X4428(directory.)S X4885(The)S X2112 V X970(default)S X1285(branch)S X1594(is)S X1699(usually)S X2025(the)S X2184(trunk,)S X2457(but)S X2622(may)S X2831(be)S X2962(set)S X3110(to)S X3225(be)S X3356(a)S X3437(side)S X3635(branch.)S X3998(Side)S X4213(branches)S X4604(as)S X4724(defaults)S X2292 V X970(are)S X1133(needed)S X1457(in)S X1577(distributed)S X2047(software)S X2432(development,)S X3015(as)S X3140(discussed)S X3565(in)S X3686(the)S X3851(section)S X4177(on)S X4320(the)S X4485(RCS)S X4718(revision)S X2472 V X970(tree.)S X2868 V X10 I X720(Release)S X1060(based)S X1323(selection)S X3048 V X10 R X970(Specifying)S X1448(a)S X1537(release)S X1858(or)S X1986(branch)S X2302(number)S X2653(selects)S X2965(the)S X3133(latest)S X3390(revision)S X3758(in)S X3882(that)S X4078(release)S X4400(or)S X4529(branch.)S X4901(For)S X3228 V X970(instance,)S X3408 V X10 I X1330(co)S X1484(\261r2)S X1683(*,v)S X3648 V X10 R X970(retrieves)S X1344(the)S X1497(latest)S X1739(revision)S X2092(with)S X2302(release)S X2610(number)S X2947(2)S X3029(from)S X3255(each)S X3469(RCS)S X3691(\256le.)S X3906(This)S X4116(selection)S X4503(is)S X4602(convenient)S X3828 V X970(if)S X1061(a)S X1135(release)S X1441(has)S X1604(been)S X1822(completed)S X2268(and)S X2442(development)S X2988(has)S X3151(moved)S X3453(on)S X3583(to)S X3691(the)S X3843(next)S X4045(release.)S X4224 V X10 I X720(State)S X950(and)S X1130(author)S X1427(based)S X1690(selection)S X4404 V X10 R X970(If)S X1070(the)S X1226(highest)S X1549(level)S X1777(number)S X2116(within)S X2406(a)S X2484(given)S X2740(release)S X3050(number)S X3389(is)S X3490(not)S X3652(the)S X3808(desired)S X4130(one,)S X4333(the)S X4489(state)S X4707(attribute)S X4584 V X970(can)S X1138(help.)S X1395(For)S X1564(example,)S X4764 V X10 I X1330(co)S X1484(\261r2)S X1683(\261sReleased)S X2192(*,v)S X5004 V X10 R X970(retrieves)S X1352(the)S X1513(latest)S X1763(revision)S X2124(with)S X2341(release)S X2656(number)S X3001(2)S X3091(whose)S X3386(state)S X3609(attribute)S X3982(is)S X4089(`Released'.)S X4610(Of)S X4755(course,)S X5184 V X970(the)S X1126(state)S X1343(attribute)S X1710(has)S X1877(to)S X1989(be)S X2117(set)S X2262(appropriately,)S X2853(using)S X3104(the)S X10 I X3260(ci)S X10 R X3366(or)S X10 I X3483(rcs)S X10 R X3638(commands.)S X4159(Another)S X4519(alternative)S X4973(is)S X5364 V X970(to)S X1078(select)S X1335(a)S X1409(revision)S X1761(by)S X1891(its)S X2016(author,)S X2326(using)S X2573(the)S X10 I X2725(\261w)S X10 R X2872(option.)S X5760 V X10 I X720(Date)S X944(based)S X1207(selection)S X5940 V X10 R X970(Revisions)S X1399(may)S X1605(also)S X1800(be)S X1928(selected)S X2283(by)S X2417(date.)S X2672(Suppose)S X3045(a)S X3123(release)S X3433(of)S X3551(an)S X3680(entire)S X3942(system)S X4255(was)S X4445(completed)S X4896(and)S X6120 V X970(current)S X1282(on)S X1412(March)S X1702(4,)S X1807(at)S X1909(1:00)S X2117(p.m.)S X2325(local)S X2549(time.)S X2812(Then)S X3047(the)S X3199(command)S X6300 V X10 I X1330(co)S X1484(\261d'March)S X1913(4,)S X2018(1:00)S X2231(pm)S X2383(LT')S X2588(*,v)S X6540 V X10 R X970(checks)S X1293(out)S X1473(all)S X1626(the)S X1801(components)S X2337(of)S X2473(that)S X2676(release,)S X3030(independent)S X3571(of)S X3707(the)S X3882(numbering.)S X4423(The)S X10 I X4631(\261d)S X10 R X4784(option)S X6720 V X970(speci\256es)S X1346(a)S X1422(`cuto)S X1627 H X (f)show 10 -.5 mul h (f)show X10 R X1720(date',)S X1976(i.e.,)S X2155(the)S X2309(revision)S X2662(selected)S X3014(has)S X3178(a)S X3253(check-in)S X3627(date)S X3824(that)S X4005(is)S X4103(closest)S X4406(to,)S X4540(but)S X4699(not)S X4858(after)S X6900 V X970(the)S X1122(date)S X1318(given.)S X7116 V X10 I X720(Name)S X983(based)S X1246(selection)S X7296 V X10 R X970(The)S X1178(most)S X1426(powerful)S X1839(selection)S X2247(function)S X2633(is)S X2753(based)S X3033(on)S X3187(assigning)S X3619(symbolic)S X4040(names)S X4349(to)S X4481(revisions)S X4896(and)S X7920 V XEP X%%Page: 12 13 BP X/slant 0 def X/height 1.000000 def X10 R X10 R X40 V X0(-)S X580 V X2767(- 12 -)S X900 V X970(branches.)S X1412(In)S X1528(large)S X1760(systems,)S X2135(a)S X2212(single)S X2484(release)S X2793(number)S X3131(or)S X3247(date)S X3446(is)S X3546(not)S X3707(su)S X3796 H X (f)show 10 -.5 mul h (\256)show X10 R X3880(cient)S X4107(to)S X4217(collect)S X4515(the)S X4669(appropri-)S X1080 V X970(ate)S X1122(revisions)S X1519(from)S X1749(all)S X1885(groups.)S X2248(For)S X2423(example,)S X2822(suppose)S X3181(one)S X3362(wishes)S X3671(to)S X3786(combine)S X4167(release)S X4480(2)S X4567(of)S X4687(one)S X4868(sub-)S X1260 V X970(system)S X1296(and)S X1488(release)S X1812(15)S X1960(of)S X2091(another.)S X2493(Most)S X2747(likely,)S X3048(the)S X3218(creation)S X3587(dates)S X3840(of)S X3971(those)S X4229(releases)S X4591(di)S X4669 H X (f)show 10 -.5 mul h (f)show X10 R X4730(er)S X4854(also.)S X1440 V X970(Thus,)S X1226(a)S X1301(single)S X1571(revision)S X1924(number)S X2260(or)S X2375(date)S X2573(passed)S X2871(to)S X2981(the)S X10 I X3135(co)S X10 R X3261(command)S X3687(will)S X3875(not)S X4035(su)S X4124 H X (f)show 10 -.5 mul h (\256)show X10 R X4208(ce)S X4328(to)S X4438(select)S X4697(the)S X4851(right)S X1620 V X970(revisions.)S X1432(Symbolic)S X1862(revision)S X2230(numbers)S X2620(solve)S X2877(this)S X3068(problem.)S X3502(Each)S X3747(RCS)S X3983(\256le)S X4156(may)S X4373(contain)S X4712(a)S X4801(set)S X4957(of)S X1800 V X970(symbolic)S X1377(names)S X1672(that)S X1862(are)S X2023(mapped)S X2379(to)S X2497(numeric)S X2864(revision)S X3226(numbers.)S X3665(For)S X3844(example,)S X4247(assume)S X4582(the)S X4745(symbol)S X1980 V X10 I X970(V3)S X10 R X1122(is)S X1230(bound)S X1521(to)S X1640(release)S X1957(number)S X2303(2)S X2394(in)S X2513(\256le)S X10 I X2682(s,v)S X10 R X2790(,)S X2856(and)S X3041(to)S X3160(revision)S X3523(number)S X3869(15.9)S X4084(in)S X10 I X4202(t,v)S X10 R X4299(.)S X4394(Then)S X4639(the)S X4801(single)S X2160 V X970(command)S X2340 V X10 I X1330(co)S X1484(\261rV3)S X1744(s,v)S X1912(t,v)S X2580 V X10 R X970(retrieves)S X1344(the)S X1497(latest)S X1739(revision)S X2092(of)S X2206(release)S X2513(2)S X2594(from)S X10 I X2819(s,v)S X10 R X2927(,)S X2983(and)S X3159(revision)S X3513(15.9)S X3720(from)S X10 I X3946(t,v)S X10 R X4043(.)S X4130(In)S X4245(a)S X4321(large)S X4552(system)S X4862(with)S X2760 V X970(many)S X1249(modules,)S X1670(checking)S X2087(out)S X2271(all)S X2427(revisions)S X2844(with)S X3078(one)S X3278(command)S X3728(greatly)S X4061(simpli\256es)S X4507(con\256guration)S X2940 V X970(management.)S X3156 V X970(Judicious)S X1385(use)S X1555(of)S X1675(symbolic)S X2079(revision)S X2439(numbers)S X2821(helps)S X3070(with)S X3286(organizing)S X3751(large)S X3988(con\256gurations.)S X4653(A)S X4763(special)S X3336 V X720(command,)S X10 I X1195(rcsfreeze)S X10 R X1555(,)S X1636(assigns)S X1981(a)S X2081(symbolic)S X2504(revision)S X2882(number)S X3243(to)S X3377(a)S X3477(selected)S X3854(revision)S X4232(in)S X4366(every)S X4642(RCS)S X4887(\256le.)S X3516 V X10 I X720(Rcsfreeze)S X10 R X1147(e)S X1191 H X (f)show 10 -.5 mul h (f)show X10 R X1252(ectively)S X1613(freezes)S X1939(a)S X2028(con\256guration.)S X2661(The)S X2861(assigned)S X3250(symbolic)S X3662(revision)S X4029(number)S X4379(selects)S X4690(all)S X4835(com-)S X3696 V X720(ponents)S X1062(of)S X1176(the)S X1329(con\256guration.)S X1948(If)S X2045(necessary,)S X2488(symbolic)S X2886(numbers)S X3260(may)S X3462(even)S X3680(be)S X3804(intermixed)S X4267(with)S X4475(numeric)S X4832(ones.)S X3876 V X720(Thus,)S X10 I X975(V3.5)S X10 R X1191(in)S X1299(the)S X1451(above)S X1719(example)S X2087(would)S X2367(select)S X2624(revision)S X2976(2.5)S X3131(in)S X10 I X3239(s,v)S X10 R X3377(and)S X3551(branch)S X3852(15.9.5)S X4132(in)S X10 I X4240(t,v)S X10 R X4337(.)S X4092 V X970(The)S X1162(options)S X10 I X1494(\261r)S X10 R X1583(,)S X10 I X1645(\261s)S X10 R X1734(,)S X10 I X1796(\261w)S X10 R X1950(and)S X10 I X2131(\261d)S X10 R X2269(may)S X2479(be)S X2611(combined.)S X3098(If)S X3202(a)S X3284(branch)S X3593(is)S X3698(given,)S 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X4287(absolute)S X4650(minimum)S X4008 V X720(given)S X996(the)S X1172(copy-semantics)S X1847(of)S X10 I X1984(co)S X10 R X2078(.)S X2187(Access)S X2523(to)S X2655(older)S X2914(revisions)S X3329(and)S X3528(branches)S X3937(is)S X4059(more)S X4319(common)S X4724(in)S X4857(non-)S X4188 V X720(academic)S X1131(environments,)S X1735(yet)S X1892(even)S X2115(if)S X2210(access)S X2498(to)S X2610(older)S X2849(deltas)S X3116(were)S X3343(an)S X3471(order)S X3715(of)S X3832(magnitude)S X4288(more)S X4527(frequent,)S X4918(the)S X4368 V X720(combined)S X1155(average)S X1505(number)S X1851(of)S X1975(deltas)S X2249(applied)S X2584(would)S X2875(still)S X3068(be)S X3204(below)S X3490(1.2.)S X3712(Since)S X3976(RCS)S X4208(is)S X4317(faster)S X4580(than)S X4794(SCCS)S X4548 V X720(until)S X934(up)S X1064(to)S X1172(10)S X1302(delta)S X1526(applications,)S X2064(reverse)S X2381(deltas)S X2644(are)S X2795(clearly)S X3096(the)S X3248(method)S X3578(of)S X3691(choice.)S X4764 V X970(The)S X1158(second)S X1468(experiment,)S X1975(conducted)S X2418(in)S X2529(March)S X2822(of)S X2938(1984,)S X3196(involved)S X3580(surveying)S X4008(the)S X4164(existing)S X4515(RCS)S X4739(\256les)S X4940(on)S X4944 V X720(our)S X887(two)S X1071(machines.)S X1536(The)S X1724(goal)S X1929(was)S X2117(to)S X2228(determine)S X2660(the)S X2815(mean)S X3064(number)S X3402(of)S X3518(revisions)S X3912(per)S X4072(RCS)S X4295(\256le,)S X4481(as)S X4597(well)S X4802(as)S X4918(the)S X5124 V X720(space)S X977(consumed)S X1418(by)S X1554(them.)S X1845(Table)S X2109(II)S X2212(shows)S X2499(the)S X2658(results.)S X3011($Tables)S X3347(I)S X3417(and)S X3598(II)S X3701(were)S X3931(produced)S X4339(at)S X4448(di)S X4526 H X (f)show 10 -.5 mul h (f)show X10 R X4587(erent)S X4823(times)S X5304 V X720(and)S X894(are)S X1045(unrelated.$)S X5384 V X10 Y1 X883(2)S X926(2222222222222222222222222222222222222222222222222222222222222222222222222222222)S X5504 V X10 R X1486(Total)S X1727(RCS)S X2142(Total)S X2645(Mean)S X3089(Mean)S X3346(size)S X3531(of)S X3764(Mean)S X4021(size)S X4206(of)S X4439(Overhead)S X5624 V X1618(\256les)S X2067(revisions)S X2578(revisions)S X3158(RCS)S X3378(\256les)S X3846(revisions)S X5644 V X10 Y1 X883(2)S X926(2222222222222222222222222222222222222222222222222222222222222222222222222222222)S X5764 V X10 R X933(All)S X1091(\256les)S X1601(8033)S X2122(11133)S X2671(1.39)S X3251(6156)S X3926(5585)S X4545(1.10)S X5884 V X933(Files)S X1158(with)S X1601(1477)S X2172(4578)S X2671(3.10)S X3251(8074)S X3926(6041)S X4545(1.34)S X6004 V X10 Y X933(\263)S X10 R X1018(2)S X1098(deltas)S X6024 V X10 Y1 X883(2)S X926(2222222222222222222222222222222222222222222222222222222222222222222222222222222)S X883(1)S X5984 V X883(1)S X5884 V X883(1)S X5784 V X883(1)S X5684 V X883(1)S X5584 V X883(1)S X5484 V X883(1)S X6024 V X1411(1)S X5984 V X1411(1)S X5884 V X1411(1)S X5784 V X1411(1)S X5684 V X1411(1)S X5584 V X1411(1)S X5484 V X1411(1)S X6024 V X1992(1)S X5984 V X1992(1)S X5884 V X1992(1)S X5784 V X1992(1)S X5684 V X1992(1)S X5584 V X1992(1)S X5484 V X1992(1)S X6024 V X2503(1)S X5984 V X2503(1)S X5884 V X2503(1)S X5784 V X2503(1)S X5684 V X2503(1)S X5584 V X2503(1)S X5484 V X2503(1)S X6024 V X3014(1)S X5984 V X3014(1)S X5884 V X3014(1)S X5784 V X3014(1)S X5684 V X3014(1)S X5584 V X3014(1)S X5484 V X3014(1)S X6024 V X3689(1)S X5984 V X3689(1)S X5884 V X3689(1)S X5784 V X3689(1)S X5684 V X3689(1)S X5584 V X3689(1)S X5484 V X3689(1)S X6024 V X4364(1)S X5984 V X4364(1)S X5884 V X4364(1)S X5784 V X4364(1)S X5684 V X4364(1)S X5584 V X4364(1)S X5484 V X4364(1)S X6024 V X4876(1)S X5984 V X4876(1)S X5884 V X4876(1)S X5784 V X4876(1)S X5684 V X4876(1)S X5584 V X4876(1)S X5484 V X4876(1)S X6204 V X10 R X2201(Table)S X2458(II.)S X2609(Statistics)S X3001(for)S X3147(RCS)S X3367(\256les.)S X6420 V X970(The)S X1166(mean)S X1423(number)S X1769(of)S X1893(revisions)S X2295(per)S X2463(RCS)S X2694(\256le)S X2863(is)S X2972(1.39.)S X3244(Columns)S X3648(5)S X3740(and)S X3926(6)S X4018(show)S X4271(the)S X4435(mean)S X4693(sizes)S X4929($in)S X6600 V X720(bytes$)S X1004(of)S X1127(an)S X1261(RCS)S X1491(\256le)S X1659(and)S X1842(of)S X1964(the)S X2125(latest)S X2375(revision)S X2736(of)S X2858(each)S X3079(RCS)S X3308(\256le,)S X3500(respectively.)S X4076(The)S X4270(`overhead')S X4740(column)S X6780 V X720(contains)S X1093(the)S X1255(ratio)S X1478(of)S X1601(the)S X1763(mean)S X2019(sizes.)S X2308(Assuming)S X2754(that)S X2944(all)S X3084(revisions)S X3485(in)S X3603(an)S X3738(RCS)S X3969(\256le)S X4138(are)S X4300(approximately)S X4918(the)S X6960 V X720(same)S X955(size,)S X1165(this)S X1340(ratio)S X1553(gives)S X1794(a)S X1868(measure)S X2230(of)S X2343(the)S X2495(space)S X2746(consumed)S X3181(by)S X3311(the)S X3463(extra)S X3692(revisions.)S X7176 V X970(In)S X1092(our)S X1264(sample,)S X1611(over)S X1827(80)S X1966(per)S X2132(cent)S X2337(of)S X2459(the)S X2620(RCS)S X2849(\256les)S X3055(contained)S X3482(only)S X3699(a)S X3782(single)S X4061(revision.)S X4478(The)S X4673(reason)S X4973(is)S X7356 V X720(that)S X911(our)S X1085(systems)S X1443(programmers)S X2016(routinely)S X2418(check)S X2691(in)S X2810(all)S X2951(source)S X3252(\256les)S X3460(on)S X3600(the)S X3762(distribution)S X4264(tapes,)S X4534(even)S X4762(though)S X7920 V XEP X%%Page: 15 16 BP X/slant 0 def X/height 1.000000 def X10 R X10 R X40 V X0(-)S X580 V X2767(- 15 -)S X900 V X720(they)S X933(may)S X1146(never)S X1408(touch)S X1672(them)S X1914(again.)S X2227(To)S X2380(get)S X2544(a)S X2630(better)S X2899(indication)S X3341(of)S X3466(how)S X3680(much)S X3944(space)S X4207(savings)S X4549(are)S X4712(possible)S X1080 V X720(with)S X935(deltas,)S X1230(all)S X1367(measures)S X1775(with)S X1990(those)S X2238(\256les)S X2442(that)S X2629(contained)S X3054(2)S X3140(or)S X3259(more)S X3500(revisions)S X3897(were)S X4126(recomputed.)S X4688(Only)S X4924(for)S X1260 V X720(those)S X961(\256les)S X1158(is)S X1255(RCS)S X1475(necessary.)S X1947(As)S X2088(shown)S X2379(in)S X2487(the)S X2639(second)S X2946(line,)S X3151(the)S X3303(average)S X3642(number)S X3978(of)S X4092(revisions)S X4484(for)S X4631(those)S X4873(\256les)S X1440 V X720(is)S X823(3.10,)S X1059(with)S X1273(an)S X1403(overhead)S X1804(of)S X1923(1.34.)S X2188(This)S X2401(means)S X2691(that)S X2876(the)S X3033(extra)S X3267(2.10)S X3477(deltas)S X3745(require)S X4062(34)S X4197(per)S X4359(cent)S X4560(extra)S X4794(space,)S X1620 V X720(or)S X842(16)S X981(per)S X1147(cent)S X1352(per)S X1518(extra)S X1756(revision.)S X2172(Rochkind)S X1570 V X2561(3)S X1620 V X2650(measured)S X3071(the)S X3233(space)S X3494(consumed)S X3939(by)S X4079(SCCS,)S X4390(and)S X4574(reported)S X4946(an)S X1800 V X720(average)S X1067(of)S X1188(5)S X1276(revisions)S X1675(per)S X1840(group)S X2111(and)S X2293(an)S X2425(overhead)S X2828(of)S X2949(1.37)S X3162($or)S X3316(about)S X3575(9)S X3662(per)S X3826(cent)S X4029(per)S X4193(extra)S X4429(revision$.)S X4876(In)S X4996(a)S X1980 V X720(later)S X930(paper,)S X1209(Glasser)S X1930 V X1508(6)S X1980 V X1591(observed)S X1984(an)S X2111(average)S X2453(of)S X2569(7)S X2652(revisions)S X3046(per)S X3206(group)S X3472(in)S X3583(a)S X3660(single,)S X3957(large)S X4189(project,)S X4524(but)S X4685(provided)S X2160 V X720(no)S X863(overhead)S X1271(\256gure.)S X1602(In)S X1728(his)S X1888(paper)S X2152(on)S X2294(DSEE)S X2110 V X2544(5)S X2160 V X2594(,)S X2661(Leblang)S X3030(reported)S X3404(that)S X3596(delta)S X3832(storage)S X4162(combined)S X4598(with)S X4818(blank)S X2340 V X720(compression)S X1260(results)S X1556(in)S X1669(an)S X1798(overhead)S X2198(of)S X2316(a)S X2395(mere)S X2629(1\2612)S X2814(per)S X2976(cent)S X3177(per)S X3339(revision.)S X3751(Since)S X4009(leading)S X4339(blanks)S X4636(accounted)S X2520 V X720(for)S X870(about)S X1126(20)S X1260(per)S X1421(cent)S X1621(of)S X1738(the)S X1894(surveyed)S X2288(Pascal)S X2577(programs,)S X3013(a)S X3091(revision)S X3447(group)S X3714(with)S X3926(5\26110)S X4159(members)S X4558(was)S X4746(smaller)S X2700 V X720(than)S X922(a)S X996(single)S X1265(cleartext)S X1638(copy.)S X2916 V X970(The)S X1155(above)S X1423(observations)S X1958(demonstrate)S X2476(clearly)S X2777(that)S X2957(the)S X3109(space)S X3360(needed)S X3672(for)S X3818(extra)S X4047(revisions)S X4439(is)S X4537(small.)S X4840(With)S X3096 V X720(delta)S X950(storage,)S X1299(the)S X1457(luxury)S X1753(of)S X1871(keeping)S X2222(multiple)S X2591(revisions)S X2987(online)S X3272(is)S X3374(certainly)S X3758(a)S X3802 H X (f)show 10 -.5 mul h (f)show X10 R X3863(ordable.)S X4252(In)S X4370(fact,)S X4579(introducing)S X3276 V X720(a)S X803(system)S X1120(with)S X1337(delta)S X1571(storage)S X1899(may)S X2111(reduce)S X2416(storage)S X2744(requirements,)S X3330(because)S X3685(programmers)S X4257(often)S X4502(save)S X4719(back-up)S X3456 V X720(copies)S X1011(anyway.)S X1411(Since)S X1668(back-up)S X2024(copies)S X2314(are)S X2470(stored)S X2749(much)S X3006(more)S X3246(e)S X3290 H X (f)show 10 -.5 mul h (\256)show X10 R X3374(ciently)S X3681(with)S X3894(deltas,)S X4187(introducing)S X4683(a)S X4762(system)S X3636 V X720(such)S X933(as)S X1046(RCS)S X1266(may)S X1468(actually)S X1814(free)S X1998(a)S X2072(considerable)S X2606(amount)S X2936(of)S X3049(space.)S X3996 V X10 B X720(7.)S X855(Survey)S X1185(of)S X1298(Version)S X1661(Control)S X2024(Tools)S X4212 V X10 R X970(The)S X1159(need)S X1381(to)S X1493(keep)S X1715(back-up)S X2070(copies)S X2359(of)S X2477(software)S X2855(arose)S X3100(when)S X3351(programs)S X3763(and)S X3942(data)S X4143(were)S X4371(no)S X4506(longer)S X4796(stored)S X4392 V X720(on)S X861(paper)S X1123(media,)S X1433(but)S X1602(were)S X1836(entered)S X2170(from)S X2405(terminals)S X2818(and)S X3003(stored)S X3288(on)S X3428(disk.)S X3690(Back-up)S X4068(copies)S X4363(are)S X4524(desirable)S X4924(for)S X4572 V X720(reliability,)S X1166(and)S X1342(many)S X1596(modern)S X1934(editors)S X2239(automatically)S X2816(save)S X3026(a)S X3103(back-up)S X3457(copy)S X3684(for)S X3833(every)S X4087(\256le)S X4248(touched.)S X4652(This)S X4863(stra-)S X4752 V X720(tegy)S X928(is)S X1031(valuable)S X1405(for)S X1557(short-term)S X2009(back-ups,)S X2430(but)S X2593(not)S X2756(suitable)S X3102(for)S X3253(long-term)S X3682(version)S X4011(control,)S X4354(since)S X4594(an)S X4723(existing)S X4932 V X720(back-up)S X1071(copy)S X1295(is)S X1392(overwritten)S X1882(whenever)S X2299(the)S X2451(corresponding)S X3052(\256le)S X3210(is)S X3307(edited.)S X5148 V X970(Tape)S X1217(archives)S X1597(are)S X1766(suitable)S X2125(for)S X2289(long-term,)S X2756(o)S X2806 H X (f)show 10 -.5 mul h (\257)show X10 R X2890(ine)S X3060(storage.)S X3451(If)S X3565(all)S X3713(changed)S X4093(\256les)S X4308(are)S X4477(dumped)S X4847(on)S X4996(a)S X5328 V X720(back-up)S X1073(tape)S X1271(once)S X1491(per)S X1650(day,)S X1851(old)S X2010(revisions)S X2402(remain)S X2710(accessible.)S X3200(However,)S X3621(tape)S X3818(archives)S X4181(are)S X4333(unsatisfactory)S X4924(for)S X5508 V X720(version)S X1049(control)S X1367(in)S X1480(several)S X1797(ways.)S X2092(First,)S X2337(backing)S X2689(up)S X2825(the)S X2983(\256le)S X3147(system)S X3461(every)S X3718(24)S X3854(hours)S X4112(does)S X4331(not)S X4495(capture)S X4824(inter-)S X5688 V X720(mediate)S X1078(revisions.)S X1536(Secondly,)S X1975(the)S X2139(old)S X2308(revisions)S X2710(are)S X2872(not)S X3041(online,)S X3357(and)S X3542(accessing)S X3965(them)S X4206(is)S X4314(tedious)S X4644(and)S X4829(time-)S X5868 V X720(consuming.)S X1248(In)S X1365(particular,)S X1806(it)S X1896(is)S X1997(impractical)S X2480(to)S X2592(compare)S X2969(several)S X3285(old)S X3447(revisions)S X3843(of)S X3961(a)S X4040(group,)S X4333(because)S X4683(that)S X4868(may)S X6048 V X720(require)S X1037(mounting)S X1456(and)S X1635(searching)S X2052(several)S X2369(tapes.)S X2664(Tape)S X2898(archives)S X3265(are)S X3421(important)S X3845(fail-safe)S X4206(tools)S X4436(in)S X4549(the)S X4706(event)S X4957(of)S X6228 V X720(catastrophic)S X1240(disk)S X1445(failures)S X1782(or)S X1903(accidental)S X2345(deletions,)S X2769(but)S X2935(they)S X3145(are)S X3304(ill-suited)S X3698(for)S X3852(version)S X4184(control.)S X4560(Conversely,)S X6408 V X720(version)S X1044(control)S X1357(tools)S X1582(do)S X1712(not)S X1870(obviate)S X2194(the)S X2346(need)S X2564(for)S X2710(tape)S X2906(archives.)S X6624 V X970(A)S X1076(natural)S X1387(technique)S X1809(for)S X1959(keeping)S X2309(several)S X2625(old)S X2787(revisions)S X3182(online)S X3466(is)S X3567(to)S X3679(never)S X3934(delete)S X4206(a)S X4285(\256le.)S X4503(Editing)S X4833(a)S X4912(\256le)S X6804 V X720(simply)S X1036(creates)S X1355(a)S X1442(new)S X1651(\256le)S X1822(with)S X2043(the)S X2208(same)S X2456(name,)S X2740(but)S X2911(with)S X3132(a)S X3218(di)S X3296 H X (f)show 10 -.5 mul h (f)show X10 R X3357(erent)S X3598(sequence)S X4005(number.)S X4407(This)S X4627(technique,)S X6984 V X720(available)S X1119(as)S X1241(an)S X1374(option)S X1669(in)S X1786(DEC's)S X2097(VMS)S X2353(operating)S X2769(system,)S X3111(turns)S X3350(out)S X3518(to)S X3636(be)S X3770(inadequate)S X4242(for)S X4398(version)S X4732(control.)S X7164 V X720(First,)S X970(it)S X1067(is)S X1174(prohibitively)S X1731(expensive)S X2170(in)S X2288(terms)S X2550(of)S X2673(storage)S X3001(costs,)S X3266(especially)S X3705(since)S X3950(no)S X4090(data)S X4296(compression)S X4841(tech-)S X7344 V X720(niques)S X1016(are)S X1172(employed.)S X1656(Secondly,)S X2088(indiscriminately)S X2773(storing)S X3086(every)S X3342(change)S X3659(produces)S X4054(too)S X4217(many)S X4474(revisions,)S X4896(and)S X7920 V XEP X%%Page: 16 17 BP X/slant 0 def X/height 1.000000 def X10 R X10 R X40 V X0(-)S X580 V X2767(- 16 -)S X900 V X720(programmers)S X1289(have)S X1514(di)S X1592 H X (f)show 10 -.5 mul h (\256)show X10 R X1676(culties)S X1974(distinguishing)S X2579(them.)S X2871(The)S X3063(proliferation)S X3599(of)S X3718(revisions)S X4115(forces)S X4394(programmers)S X4962(to)S X1080 V X720(spend)S X989(much)S X1247(time)S X1461(on)S X1597(\256nding)S X1917(and)S X2097(deleting)S X2455(useless)S X2774(\256les.)S X3032(Thirdly,)S X3393(most)S X3624(of)S X3743(the)S X3902(support)S X4239(functions)S X4648(like)S X4835(lock-)S X1260 V X720(ing,)S X903(logging,)S X1264(revision)S X1616(selection,)S X2026(and)S X2200(identi\256cation)S X2758(described)S X3170(in)S X3278(this)S X3453(paper)S X3704(are)S X3855(not)S X4013(available.)S X1476 V X970(An)S X1122(alternative)S X1573(approach)S X1968(is)S X2065(to)S X2173(separate)S X2529(editing)S X2837(from)S X3061(revision)S X3414(control.)S X3783(The)S X3969(user)S X4166(may)S X4369(repeatedly)S X4815(edit)S X4996(a)S X1656 V X720(given)S X985(revision,)S X1374(until)S X1600(freezing)S X1968(it)S X2066(with)S X2286(an)S X2422(explicit)S X2764(command.)S X3255(Once)S X3507(a)S X3593(revision)S X3957(is)S X4066(frozen,)S X4387(it)S X4485(is)S X4594(stored)S X4880(per-)S X1836 V X720(manently)S X1122(and)S X1296(can)S X1464(no)S X1594(longer)S X1879(be)S X2003(modi\256ed.)S X2445($In)S X2592(RCS,)S X2838(freezing)S X3195(a)S X3270(revisions)S X3662(is)S X3760(done)S X3985(with)S X10 I X4194(ci)S X10 R X4266(.$)S X4385(Editing)S X4711(a)S X4786(frozen)S X2016 V X720(revision)S X1073(implicitly)S X1494(creates)S X1801(a)S X1876(new)S X2073(one,)S X2273(which)S X2548(can)S X2717(again)S X2964(be)S X3089(changed)S X3451(repeatedly)S X3896(until)S X4110(it)S X4196(is)S X4293(frozen)S X4577(itself.)S X4862(This)S X2196 V X720(approach)S X1123(saves)S X1377(exactly)S X1703(those)S X1952(revisions)S X2352(that)S X2541(the)S X2702(user)S X2907(considers)S X3323(important,)S X3776(and)S X3959(keeps)S X4225(the)S X4386(number)S X4730(of)S X4852(revi-)S X2376 V X720(sions)S X969(manageable.)S X1543(IBM's)S X1847(CLEAR/CASTER)S X2326 V X2587(7)S X2376 V X2637(,)S X2705(AT&T's)S X3092(SCCS)S X2326 V X3338(3)S X2376 V X3388(,)S X3456(CMU's)S X3799(SDC)S X2326 V X3994(8)S X2376 V X4087(and)S X4274(DEC's)S X4589(CMS)S X2326 V X4801(9)S X2376 V X4851(,)S X4919(are)S X2556 V X720(examples)S X1142(of)S X1270(version)S X1609(control)S X1937(systems)S X2299(using)S X2561(this)S X2751(approach.)S X3216(CLEAR/CASTER)S X4001(maintains)S X4435(a)S X4524(data)S X4735(base)S X4957(of)S X2736 V X720(programs,)S X1163(speci\256cations,)S X1773(documentation)S X2407(and)S X2591(messages,)S X3033(using)S X3290(deltas.)S X3618(Its)S X3758(goal)S X3970(is)S X4077(to)S X4195(provide)S X4540(control)S X4863(over)S X2916 V X720(the)S X873(development)S X1420(process)S X1750(from)S X1975(a)S X2050(management)S X2591(viewpoint.)S X3077(SCCS)S X3354(stores)S X3618(multiple)S X3983(revisions)S X4375(of)S X4489(source)S X4780(text)S X4962(in)S X3096 V X720(an)S X861(ancestral)S X1262(tree,)S X1483(records)S X1823(a)S X1913(log)S X2087(entry)S X2338(for)S X2500(each)S X2728(revision,)S X3121(provides)S X3511(access)S X3811(control,)S X4165(and)S X4355(has)S X4534(facilities)S X4924(for)S X3276 V X720(uniquely)S X1100(identifying)S X1569(each)S X1781(revision.)S X2188(An)S X2340(e)S X2384 H X (f)show 10 -.5 mul h (\256)show X10 R X2468(cient)S X2692(delta)S X2916(technique)S X3334(reduces)S X3668(the)S X3820(space)S X4072(consumed)S X4508(by)S X4639(each)S X4852(revi-)S X3456 V X720(sion)S X919(group.)S X1239(SDC)S X1466(is)S X1565(much)S X1819(simpler)S X2151(than)S X2355(SCCS)S X2633(because)S X2980(it)S X3068(stores)S X3333(not)S X3493(more)S X3730(than)S X3934(two)S X4116(revisions.)S X4563(However,)S X4984(it)S X3636 V X720(maintains)S X1140(a)S X1215(complete)S X1612(log)S X1771(for)S X1918(all)S X2049(old)S X2208(revisions,)S X2625(some)S X2867(of)S X2981(which)S X3256(may)S X3459(be)S X3584(on)S X3715(back-up)S X4067(tape.)S X4319(CMS,)S X4587(like)S X4769(SCCS,)S X3816 V X720(manages)S X1099(tree-structured)S X1710(revision)S X2062(groups,)S X2389(but)S X2547(o)S X2597 H X (f)show 10 -.5 mul h (f)show X10 R X2658(ers)S X2804(no)S X2934(identi\256cation)S X3492(mechanism.)S X4032 V X970(Tools)S X1228(for)S X1374(dealing)S X1698(with)S X1906(con\256gurations)S X2508(are)S X2659(still)S X2841(in)S X2950(a)S X3025(state)S X3239(of)S X3353(\257ux.)S X3595(SCCS,)S X3897(SDC)S X4123(and)S X4298(CMS)S X4541(can)S X4710(be)S X4835(com-)S X4212 V X720(bined)S X988(with)S X1211(MAKE)S X1550(or)S X1678(MAKE-like)S X2200(programs.)S X2677(Since)S X2944(\257exible)S X3289(selection)S X3689(rules)S X3928(are)S X4094(missing)S X4451(from)S X4690(all)S X4835(these)S X4392 V X720(tools,)S X986(it)S X1088(is)S X1201(sometimes)S X1675(di)S X1753 H X (f)show 10 -.5 mul h (\256)show X10 R X1837(cult)S X2033(to)S X2157(specify)S X2491(precisely)S X2897(which)S X3187(revision)S X3555(of)S X3685(each)S X3914(group)S X4194(should)S X4508(be)S X4649(passed)S X4962(to)S X4572 V X720(MAKE)S X1055(for)S X1211(building)S X1585(a)S X1669(desired)S X1997(con\256guration.)S X2625(The)S X2820(Xerox)S X3109(Cedar)S X3387(system)S X4522 V X3665(10)S X4572 V X3805(provides)S X4189(a)S X4273(`System)S X4641(Modeller')S X4752 V X720(that)S X903(can)S X1074(rebuild)S X1390(a)S X1467(con\256guration)S X2033(from)S X2260(an)S X2387(arbitrary)S X2763(set)S X2907(of)S X3023(module)S X3356(revisions.)S X3806(The)S X3995(revisions)S X4390(of)S X4507(a)S X4585(module)S X4919(are)S X4932 V X720(only)S X935(distinguished)S X1506(by)S X1643(creation)S X2001(time,)S X2241(and)S X2422(there)S X2658(is)S X2762(no)S X2899(tool)S X3092(for)S X3245(managing)S X3676(groups.)S X4039(Since)S X4297(the)S X4455(selection)S X4846(rules)S X5112 V X720(are)S X871(primitive,)S X1293(the)S X1445(System)S X1770(Modeller)S X2166(appears)S X2500(to)S X2608(be)S X2732(somewhat)S X3167(tedious)S X3486(to)S X3594(use.)S X3812(Apollo's)S X4192(DSEE)S X5062 V X4442(5)S X5112 V X4522(is)S X4620(a)S X4695(sophisti-)S X5292 V X720(cated)S X961(software)S X1335(engineering)S X1837(environment.)S X2428(It)S X2520(manages)S X2900(revision)S X3253(groups)S X3556(in)S X3665(a)S X3740(way)S X3937(similar)S X4245(to)S X4353(SCCS)S X4629(and)S X4803(CMS.)S X5472 V X720(Con\256gurations)S X1359(are)S X1524(built)S X1752(using)S X2013(`con\256guration)S X2624(threads'.)S X3045(A)S X3162(con\256guration)S X3740(thread)S X4034(states)S X4301(which)S X4590(revision)S X4957(of)S X5652 V X720(each)S X947(group)S X1225(named)S X1536(in)S X1659(a)S X1748(con\256guration)S X2326(should)S X2638(be)S X2777(chosen.)S X3154(A)S X3271(con\256guration)S X3849(thread)S X4142(may)S X4358(contain)S X4696(dynamic)S X5832 V X720(speci\256ers)S X1141($e.g.,)S X1387(`choose)S X1741(the)S X1908(revisions)S X2314(I)S X2392(am)S X2559(currently)S X2964(working)S X3342(on,)S X3512(and)S X3701(the)S X3868(most)S X4108(recent)S X4396(revisions)S X4802(other-)S X6012 V X720(wise'$,)S X1030(which)S X1310(are)S X1467(bound)S X1753(automatically)S X2332(at)S X2439(build)S X2680(time.)S X2948(It)S X3044(also)S X3240(provides)S X3619(a)S X3698(noti\256cation)S X4189(mechanism)S X4679(for)S X4830(alert-)S X6192 V X720(ing)S X878(maintainers)S X1374(about)S X1626(the)S X1778(need)S X1996(to)S X2104(rebuild)S X2417(a)S X2491(system)S X2799(after)S X3011(a)S X3085(change.)S X6408 V X970(RCS)S X1195(is)S X1298(based)S X1561(on)S X1697(a)S X1777(general)S X2106(model)S X2392(for)S X2544(describing)S X2996(multi-version/multi-con\256guration)S X4377(systems)S X6358 V X4694(11)S X6408 V X4794(.)S X4885(The)S X6588 V X720(model)S X1017(describes)S X1435(systems)S X1798(using)S X2061(AND/OR)S X2490(graphs,)S X2827(where)S X3116(AND)S X3378(nodes)S X3657(represent)S X4068(con\256gurations,)S X4711(and)S X4901(OR)S X6768 V X720(nodes)S X1012(represent)S X1436(version)S X1789(groups.)S X2175(The)S X2389(model)S X2698(gives)S X2968(rise)S X3171(to)S X3308(a)S X3411(suit)S X3615(of)S X3757(selection)S X4171(rules)S X4425(for)S X4601(composing)S X6948 V X720(con\256gurations,)S X1354(almost)S X1658(all)S X1795(of)S X1915(which)S X2196(are)S X2354(implemented)S X2913(in)S X3028(RCS.)S X3310(The)S X3501(revisions)S X3898(selected)S X4255(by)S X4391(RCS)S X4617(are)S X4774(passed)S X7128 V X720(to)S X831(MAKE)S X1158(for)S X1307(con\256guration)S X1873(building.)S X2295(Revision)S X2684(group)S X2950(management)S X3493(is)S X3593(modelled)S X3999(after)S X4215(SCCS.)S X4550(RCS)S X4774(retains)S X7308 V X720(SCCS's)S X1080(best)S X1283(features,)S X1665(but)S X1835(o)S X1885 H X (f)show 10 -.5 mul h (f)show X10 R X1946(ers)S X2104(a)S X2190(signi\256cantly)S X2727(simpler)S X3068(user)S X3275(interface,)S X3689(\257exible)S X4030(selection)S X4426(rules,)S X4686(adequate)S X7920 V XEP X%%Page: 17 18 BP X/slant 0 def X/height 1.000000 def X10 R X10 R X40 V X0(-)S X580 V X2767(- 17 -)S X900 V X720(integration)S X1190(with)S X1405(MAKE)S X1736(and)S X1917(improved)S X2337(identi\256cation.)S X2957(A)S X3066(detailed)S X3419(comparison)S X3922(of)S X4042(RCS)S X4270(and)S X4452(SCCS)S X4736(appears)S X1080 V X720(in)S X828(Reference)S X1261(4.)S X1296 V X970(An)S X1126(important)S X1549(component)S X2027(of)S X2144(all)S X2278(revision)S X2634(control)S X2951(systems)S X3303(is)S X3405(a)S X3484(program)S X3857(for)S X4008(computing)S X4471(deltas.)S X4794(SCCS)S X1476 V X720(and)S X896(RCS)S X1118(use)S X1283(the)S X1437(program)S X10 I X1807(diff)S X1426 V X10 R X1941(2)S X1476 V X1991(,)S X2048(which)S X2324(\256rst)S X2512(computes)S X2927(the)S X3081(longest)S X3402(common)S X3784(substring)S X4183(of)S X4298(two)S X4479(revisions,)S X4896(and)S X1656 V X720(then)S X927(produces)S X1322(the)S X1479(delta)S X1708(from)S X1937(that)S X2122(substring.)S X2579(The)S X2769(delta)S X2998(is)S X3100(simply)S X3408(an)S X3537(edit)S X3722(script)S X3979(consisting)S X4420(of)S X4538(deletion)S X4896(and)S X1836 V X720(insertion)S X1100(commands)S X1563(that)S X1743(generate)S X2110(one)S X2284(revision)S X2636(from)S X2860(the)S X3012(other.)S X2052 V X970(A)S X1078(delta)S X1308(based)S X1571(on)S X1707(a)S X1787(longest)S X2112(common)S X2498(substring)S X2901(is)S X3004(not)S X3168(necessarily)S X3648(minimal,)S X4044(because)S X4396(it)S X4489(does)S X4709(not)S X4874(take)S X2232 V X720(advantage)S X1156(of)S X1271(crossing)S X1636(block)S X1890(moves.)S X2238(Crossing)S X2626(block)S X2880(moves)S X3173(arise)S X3392(if)S X3484(two)S X3665(or)S X3779(more)S X4015(blocks)S X4307(of)S X4421(lines)S X4641($e.g.,)S X4874(pro-)S X2412 V X720(cedures$)S X1090(appear)S X1388(in)S X1499(a)S X1576(di)S X1654 H X (f)show 10 -.5 mul h (f)show X10 R X1715(erent)S X1947(order)S X2190(in)S X2301(two)S X2484(revisions.)S X2933(An)S X3088(edit)S X3271(script)S X3526(derived)S X3858(from)S X4085(a)S X4162(longest)S X4484(common)S X4868(sub-)S X2592 V X720(string)S X987(\256rst)S X1182(deletes)S X1498(the)S X1659(shorter)S X1975(of)S X2097(the)S X2258(two)S X2447(blocks,)S X2772(and)S X2955(then)S X3166(reinserts)S X3543(it.)S X3693(Heckel)S X2542 V X3975(12)S X2592 V X4114(proposed)S X4519(an)S X4651(algorithm)S X2772 V X720(for)S X884(detecting)S X1298(block)S X1568(moves,)S X1902(but)S X2078(since)S X2331(the)S X2501(algorithm)S X2938(is)S X3053(based)S X3328(on)S X3476(heuristics,)S X3932(there)S X4179(are)S X4348(conditions)S X4813(under)S X2952 V X720(which)S X997(the)S X1152(generated)S X1572(delta)S X1799(is)S X1899(far)S X2042(from)S X2269(minimal.)S X2691(DSEE)S X2974(uses)S X3179(this)S X3357(algorithm)S X3779(combined)S X4205(with)S X4415(blank)S X4669(compres-)S X3132 V X720(sion,)S X965(apparently)S X1439(with)S X1670(satisfactory)S X2183(overall)S X2514(results.)S X2884(A)S X3010(new)S X3230(algorithm)S X3673(that)S X3877(is)S X3998(guaranteed)S X4489(to)S X4621(produce)S X4996(a)S X3312 V X720(minimal)S X1085(delta)S X1310(based)S X1568(on)S X1699(block)S X1951(moves)S X2242(appears)S X2576(in)S X2684(Reference)S X3117(13.)S X3302(A)S X3404(future)S X3672(release)S X3978(of)S X4091(RCS)S X4311(will)S X4497(use)S X4660(this)S X4835(algo-)S X3492 V X720(rithm.)S X3708 V X10 I X970(Acknowledgements)S X10 R X1735(:)S X1818(Many)S X2106(people)S X2427(have)S X2670(helped)S X2991(make)S X3262(RCS)S X3507(a)S X3606(success)S X3960(by)S X4115(contributed)S X4626(criticisms,)S X3888 V X720(suggestions,)S X1246(corrections,)S X1748(and)S X1926(even)S X2148(whole)S X2426(new)S X2626(commands)S X3093($including)S X3538(manual)S X3866(pages$.)S X4214(The)S X4402(list)S X4558(of)S X4674(people)S X4973(is)S X4068 V X720(too)S X878(long)S X1086(to)S X1194(be)S X1318(reproduced)S X1796(here,)S X2022(but)S X2180(my)S X2338(sincere)S X2650(thanks)S X2941(for)S X3087(their)S X3300(help)S X3502(and)S X3676(goodwill)S X4062(goes)S X4275(to)S X4383(all)S X4513(of)S X4626(them.)S X4488 V X10 B X720(Appendix:)S X1201(Synopsis)S X1605(of)S X1718(RCS)S X1948(Operations)S X4680 V X10 I X720(ci)S X10 B X822(\261)S X902(check)S X1176(in)S X1290(revisions)S X4800 V X10 I X970(Ci)S X10 R X1102(stores)S X1372(the)S X1531(contents)S X1901(of)S X2021(a)S X2102(working)S X2472(\256le)S X2637(into)S X2830(the)S X2989(corresponding)S X3598(RCS)S X3826(\256le)S X3992(as)S X4113(a)S X4195(new)S X4399(revision.)S X4814(If)S X4918(the)S X4920 V X970(RCS)S X1191(\256le)S X1350(doesn't)S X1675(exist,)S X10 I X1920(ci)S X10 R X2023(creates)S X2330(it.)S X10 I X2472(Ci)S X10 R X2598(removes)S X2967(the)S X3120(working)S X3484(\256le,)S X3668(unless)S X3949(one)S X4124(of)S X4238(the)S X4391(options)S X10 I X4717(\261u)S X10 R X4848(or)S X10 I X4962(\261l)S X5040 V X10 R X970(is)S X1071(present.)S X1448(For)S X1621(each)S X1837(check-in,)S X10 I X2239(ci)S X10 R X2345(asks)S X2551(for)S X2701(a)S X2779(commentary)S X3312(describing)S X3763(the)S X3920(changes)S X4276(relative)S X4610(to)S X4723(the)S X4880(pre-)S X5160 V X970(vious)S X1217(revision.)S X5400 V X10 I X970(Ci)S X10 R X1111(assigns)S X1446(the)S X1614(revision)S X1982(number)S X2333(given)S X2601(by)S X2747(the)S X10 I X2915(\261r)S X10 R X3050(option;)S X3380(if)S X3487(that)S X3683(option)S X3985(is)S X4098(missing,)S X4481(it)S X4583(derives)S X4918(the)S X5520 V X970(number)S X1313(from)S X1545(the)S X1705(lock)S X1915(held)S X2125(by)S X2263(the)S X2423(user;)S X2655(if)S X2754(there)S X2991(is)S X3096(no)S X3234(lock)S X3444(and)S X3625(locking)S X3962(is)S X4066(not)S X4231(strict,)S X10 I X4493(ci)S X10 R X4602(increments)S X5640 V X970(the)S X1136(number)S X1485(of)S X1612(the)S X1778(latest)S X2033(revision)S X2399(on)S X2544(the)S X2711(trunk.)S X3022(A)S X3139(side)S X3345(branch)S X3661(can)S X3844(only)S X4067(be)S X4206(started)S X4517(by)S X4662(explicitly)S X5760 V X970(specifying)S X1416(its)S X1541(number)S X1876(with)S X2084(the)S X10 I X2236(\261r)S X10 R X2355(option)S X2641(during)S X2932(check-in.)S X6000 V X10 I X970(Ci)S X10 R X1106(also)S X1308(determines)S X1787(whether)S X2149(the)S X2312(revision)S X2675(to)S X2794(be)S X2929(checked)S X3296(in)S X3415(is)S X3523(di)S X3601 H X (f)show 10 -.5 mul h (f)show X10 R X3662(erent)S X3902(from)S X4137(the)S X4300(previous)S X4685(one,)S X4896(and)S X6120 V X970(asks)S X1194(whether)S X1567(to)S X1697(proceed)S X2064(if)S X2177(not.)S X2412(This)S X2642(facility)S X2977(simpli\256es)S X3419(check-in)S X3814(operations)S X4281(for)S X4448(large)S X4698(systems,)S X6240 V X970(because)S X1315(one)S X1489(need)S X1707(not)S X1865(remember)S X2299(which)S X2573(\256les)S X2770(were)S X2993(changed.)S X6480 V X970(The)S X1161(option)S X10 I X1453(\261k)S X10 R X1583(searches)S X1956(the)S X2114(checked)S X2476(in)S X2590(\256le)S X2754(for)S X2906(identi\256cation)S X3470(markers)S X3827(containing)S X4285(the)S X4443(attributes)S X4852(revi-)S X6600 V X970(sion)S X1169(number,)S X1530(check-in)S X1904(date,)S X2126(author)S X2412(and)S X2587(state,)S X2826(and)S X3001(assigns)S X3321(these)S X3557(to)S X3666(the)S X3819(new)S X4016(revision)S X4369(rather)S X4632(than)S X4835(com-)S X6720 V X970(puting)S X1275(them.)S X1579(This)S X1806(option)S X2111(is)S X2227(useful)S X2520(for)S X2685(software)S X3077(distribution:)S X3616(Recipients)S X4087(of)S X4219(distributed)S X4697(software)S X6840 V X970(using)S X1227(RCS)S X1457(should)S X1764(check)S X2036(in)S X2154(updates)S X2499(with)S X2717(the)S X10 I X2879(\261k)S X10 R X3013(option.)S X3364(This)S X3581(convention)S X4064(guarantees)S X4529(that)S X4718(revision)S X6960 V X970(numbers,)S X1369(check-in)S X1742(dates,)S X2002(etc.,)S X2198(are)S X2349(the)S X2501(same)S X2736(at)S X2838(all)S X2968(sites.)S X7116 V X10 I X720(co)S X10 B X844(\261)S X924(check)S X1198(out)S X1367(revisions)S X7236 V X10 I X970(Co)S X10 R X1136(retrieves)S X1528(revisions)S X1938(according)S X2380(to)S X2507(revision)S X2878(number,)S X3257(date,)S X3497(author)S X3801(and)S X3994(state)S X4226(attributes.)S X4702(It)S X4813(either)S X7920 V XEP X%%Page: 18 19 BP X/slant 0 def X/height 1.000000 def X10 R X10 R X40 V X0(-)S X520 V X2767(- 18 -)S X840 V X970(places)S X1251(the)S X1405(revision)S X1759(into)S X1947(the)S X2101(working)S X2465(\256le,)S X2649(or)S X2763(prints)S X3022(it)S X3109(on)S X3240(the)S X3393(standard)S X3762(output.)S X10 I X4104(Co)S X10 R X4252(always)S X4560(expands)S X4918(the)S X960 V X970(identi\256cation)S X1528(markers.)S X1116 V X10 I X720(ident)S X10 B X950(\261)S X1030(extract)S X1358(identi\256cation)S X1950(markers)S X1236 V X10 I X970(Ident)S X10 R X1205(extracts)S X1545(the)S X1697(identi\256cation)S X2255(markers)S X2606(expanded)S X3018(by)S X10 I X3148(co)S X10 R X3272(from)S X3496(any)S X3670(\256le)S X3828(and)S X4002(prints)S X4260(them.)S X1392 V X10 I X720(rcs)S X10 B X872(\261)S X952(change)S X1282(RCS)S X1512(\256le)S X1670(attributes)S X1512 V X10 I X970(Rcs)S X10 R X1144(is)S X1241(an)S X1365(administrative)S X1967(operation)S X2374(that)S X2554(changes)S X2905(access)S X3189(lists,)S X3406(locks,)S X3673(unlocks,)S X4040(breaks)S X4331(locks,)S X4598(toggles)S X4918(the)S X1632 V X970(strict-locking)S X1541(feature,)S X1880(sets)S X2068(state)S X2289(attributes)S X2699(and)S X2881(symbolic)S X3286(revision)S X3646(numbers,)S X4053(changes)S X4412(the)S X4571(description,)S X1752 V X970(and)S X1144(deletes)S X1451(revisions.)S X1897(A)S X1999(revision)S X2351(can)S X2519(only)S X2727(be)S X2851(deleted)S X3169(if)S X3260(it)S X3346(is)S X3443(not)S X3601(the)S X3753(fork)S X3949(of)S X4062(a)S X4136(side)S X4327(branch.)S X1908 V X10 I X720(rcsclean)S X10 B X1088(\261)S X1168(clean)S X1420(working)S X1806(directory)S X2028 V X10 I X970(Rcsclean)S X10 R X1360(removes)S X1728(working)S X2091(\256les)S X2288(that)S X2468(were)S X2691(checked)S X3047(out)S X3205(but)S X3363(never)S X3614(changed.*)S X2184 V X10 I X720(rcsdiff)S X10 B X1006(\261)S X1086(compare)S X1487(revisions)S X2304 V X10 I X970(Rcsdiff)S X10 R X1289(compares)S X1712(two)S X1903(revisions)S X2305(and)S X2490(prints)S X2759(their)S X2983(di)S X3061 H X (f)show 10 -.5 mul h (f)show X10 R X3122(erence,)S X3447(using)S X3705(the)S X3868(UNIX)S X4158(tool)S X10 I X4355(diff)S X10 R X4489(.)S X4585(One)S X4793(of)S X4918(the)S X2424 V X970(revisions)S X1361(compared)S X1784(may)S X1986(be)S X2110(checked)S X2466(out.)S X2679(This)S X2887(command)S X3311(is)S X3408(useful)S X3682(for)S X3828(\256nding)S X4142(out)S X4300(about)S X4552(changes.)S X2580 V X10 I X720(rcsfreeze)S X10 B X1110(\261)S X1190(freeze)S X1473(a)S X1553(con\256guration)S X2700 V X10 I X970(Rcsfreeze)S X10 R X1394(assigns)S X1726(the)S X1891(same)S X2139(symbolic)S X2549(revision)S X2914(number)S X3262(to)S X3383(a)S X3470(given)S X3735(revision)S X4100(in)S X4221(all)S X4364(RCS)S X4597(\256les.)S X4862(This)S X2820 V X970(command)S X1394(is)S X1491(useful)S X1765(for)S X1911(accurately)S X2350(recording)S X2762(a)S X2836(con\256guration.*)S X2976 V X10 I X720(rcsmerge)S X10 B X1121(\261)S X1201(merge)S X1496(revisions)S X3096 V X10 I X970(Rcsmerge)S X10 R X1400(merges)S X1725(two)S X1912(revisions,)S X10 I X2335(rev1)S X10 R X2549(and)S X10 I X2730(rev2)S X10 R X2907(,)S X2969(with)S X3184(respect)S X3504(to)S X3620(a)S X3702(common)S X4090(ancestor.)S X4515(A)S X4625(3-way)S X4912(\256le)S X3216 V X970(comparison)S X1472(determines)S X1946(the)S X2104(segments)S X2512(of)S X2631(lines)S X2856(that)S X3042(are)S X3199($a$)S X3345(the)S X3503(same)S X3744(in)S X3858(all)S X3994(three)S X4228(revisions,)S X4649(or)S X4767($b$)S X4918(the)S X3336 V X970(same)S X1216(in)S X1336(2)S X1428(revisions,)S X1856(or)S X1981($c$)S X2133(di)S X2211 H X (f)show 10 -.5 mul h (f)show X10 R X2272(erent)S X2513(in)S X2633(all)S X2775(three.)S X3071(For)S X3252(all)S X3394(segments)S X3808(of)S X3933(type)S X4147($b$)S X4305(where)S X10 I X4590(rev1)S X10 R X4809(is)S X4918(the)S X3456 V X970(di)S X1048 H X (f)show 10 -.5 mul h (f)show X10 R X1109(ering)S X1350(revision,)S X1733(the)S X1891(segment)S X2260(in)S X10 I X2374(rev1)S X10 R X2587(replaces)S X2949(the)S X3107(corresponding)S X3713(segment)S X4081(of)S X10 I X4199(rev2)S X10 R X4376(.)S X4466(Type)S X4706($c$)S X4851(indi-)S X3576 V X970(cates)S X1215(an)S X1355(overlapping)S X1878(change,)S X2231(is)S X2344(\257agged)S X2684(as)S X2813(an)S X2953(error,)S X3217(and)S X3408(requires)S X3776(user)S X3989(intervention)S X4519(to)S X4644(select)S X4918(the)S X3696 V X970(correct)S X1276(alternative.)S X3852 V X10 I X720(rlog)S X10 B X917(\261)S X997(read)S X1221(log)S X1379(messages)S X3972 V X10 I X970(Rlog)S X10 R X1189(prints)S X1447(the)S X1599(log)S X1757(messages)S X2164(and)S X2338(other)S X2573(information)S X3075(in)S X3183(an)S X3307(RCS)S X3527(\256le.)S X6962 V X8 Y1 X720(333333333333333333)S X7080 V X8 R X820(*)S X900(The)S X8 I X1048(rcsclean)S X8 R X1341(and)S X8 I X1480(rcsfreeze)S X8 R X1790(commands)S X2159(are)S X2279(optional)S X2564(and)S X2703(are)S X2823(not)S X2949(always)S X3194(installed.)S X7920 V XEP X%%Page: 19 20 BP X/slant 0 def X/height 1.000000 def X8 R X8 R X40 V X10 R X0(-)S X520 V X2767(- 19 -)S X840 V X10 B X720(References)S X1032 V X10 R X720(1.)S X970(Feldman,)S X1378(Stuart)S X1650(I.,)S X1766(``Make\320A)S X2264(Program)S X2642(for)S X2792(Maintaining)S X3315(Computer)S X3749(Programs,'')S X10 I X4257(Software\320Practice)S X1152 V X970(&)S X1078(Experience)S X10 R X1526(,)S X1581(vol.)S X1764(9,)S X1869(no.)S X2024(3,)S X2129(pp.)S X2284(255-265,)S X2672(March)S X2962(1979.)S X1308 V X720(2.)S X970(Hunt,)S X1229(James)S X1507(W.)S X1660(and)S X1838(McIlroy,)S X2224(M.)S X2372(D.,)S X2528(``An)S X2750(Algorithm)S X3201(for)S X3351(Di)S X3451 H X (f)show 10 -.5 mul h (f)show X10 R X3512(erential)S X3846(File)S X4037(Comparison,'')S X4652(41,)S X4812(Com-)S X1428 V X970(puting)S X1256(Science)S X1596(Technical)S X2019(Report,)S X2346(Bell)S X2543(Laboratories,)S X3102(June)S X3315(1976.)S X1584 V X720(3.)S X970(Rochkind,)S X1414(Marc)S X1654(J.,)S X1773(``The)S X2024(Source)S X2331(Code)S X2572(Control)S X2908(System,'')S X10 I X3324(IEEE)S X3570(Transactions)S X4123(on)S X4254(Software)S X4641(Engineer-)S X1704 V X970(ing)S X10 R X1098(,)S X1153(vol.)S X1336(SE-1,)S X1591(no.)S X1746(4,)S X1851(pp.)S X2006(364-370,)S X2394(Dec.)S X2609(1975.)S X1860 V X720(4.)S X970(Tichy,)S X1275(Walter)S X1593(F.,)S X1746(``Design,)S X2168(Implementation,)S X2874(and)S X3066(Evaluation)S X3547(of)S X3678(a)S X3770(Revision)S X4174(Control)S X4528(System,'')S X4962(in)S X1980 V X10 I X970(Proceedings)S X1503(of)S X1615(the)S X1771(6th)S X1933(International)S X2495(Conference)S X2989(on)S X3123(Software)S X3512(Engineering)S X10 R X4006(,)S X4064(pp.)S X4222(58-67,)S X4513(ACM,)S X4799(IEEE,)S X2100 V X970(IPS,)S X1170(NBS,)S X1420(September)S X1877(1982.)S X2256 V X720(5.)S X970(Leblang,)S X1357(David)S X1636(B.)S X1763(and)S X1942(Chase,)S X2247(Robert)S X2555(P.,)S X2697(``Computer-Aided)S X3476(Software)S X3872(Engineering)S X4396(in)S X4510(a)S X4590(Distributed)S X2376 V X970(Workstation)S X1505(Environment,'')S X10 I X2159(SIGPLAN)S X2600(Notices)S X10 R X2900(,)S X2966(vol.)S X3160(19,)S X3325(no.)S X3490(5,)S X3605(pp.)S X3770(104-112,)S X4168(May)S X4391(1984.)S X4686(Proceed-)S X2496 V X970(ings)S X1184(of)S X1314(the)S X1484(ACM)S X1760(SIGSOFT/SIGPLAN)S X2664(Software)S X3072(Engineering)S X3608(Symposium)S X4135(on)S X4283(Practical)S X4680(Software)S X2616 V X970(Development)S X1538(Environments.)S X2772 V X720(6.)S X970(Glasser,)S X1325(Alan)S X1551(L.,)S X1694(``The)S X1947(Evolution)S X2374(of)S X2489(a)S X2565(Source)S X2874(Code)S X3117(Control)S X3455(System,'')S X10 I X3873(Software)S X4261(Engineering)S X4787(Notes)S X10 R X5015(,)S X2892 V X970(vol.)S X1180(3,)S X1312(no.)S X1494(5,)S X1626(pp.)S X1808(122-125,)S X2223(Nov.)S X2477(1978.)S X2789(Proceedings)S X3334(of)S X3474(the)S X3653(Software)S X4069(Quality)S X4425(and)S X4625(Assurance)S X3012 V X970(Workshop.)S X3168 V X720(7.)S X970(Brown,)S X1297(H.B.,)S X1541(``The)S X1792(Clear/Caster)S X2321(System,'')S X10 I X2737(Nato)S X2962(Conference)S X3452(on)S X3582(Software)S X3968(Engineering,)S X4517(Rome)S X10 R X4744(,)S X4799(1970.)S X3324 V X720(8.)S X970(Habermann,)S X1493(A.)S X1623(Nico,)S X10 I X1875(A)S X1969(Software)S X2358(Development)S X2918(Control)S X3264(System,)S X10 R X3600(Technical)S X4027(Report,)S X4358(Carnegie-Mellon)S X3444 V X970(University,)S X1447(Department)S X1948(of)S X2061(Computer)S X2491(Science,)S X2856(Jan.)S X3044(1979.)S X3600 V X720(9.)S X970(DEC,)S X10 I X1258(Code)S X1532(Management)S X2116(System,)S X10 R X2481(Digital)S X2823(Equipment)S X3326(Corporation,)S X3898(1982.)S X4217(Document)S X4697(No. EA-)S X3720 V X970(23134-82)S X3876 V X720(10.)S X970(Lampson,)S X1437(Butler)S X1757(W.)S X1946(and)S X2160(Schmidt,)S X2589(Eric)S X2825(E.,)S X3006(``Practical)S X3491(Use)S X3717(of)S X3871(a)S X3986(Polymorphic)S X4574(Applicative)S X3996 V X970(Language,'')S X1491(in)S X10 I X1606(Proceedings)S X2142(of)S X2257(the)S X2416(10th)S X2630(Symposium)S X3121(on)S X3257(Principles)S X3704(of)S X3818(Programming)S X4415(Languages)S X10 R X4854(,)S X4915(pp.)S X4116 V X970(237-255,)S X1358(ACM,)S X1641(January)S X1981(1983.)S X4272 V X720(11.)S X970(Tichy,)S X1260(Walter)S X1563(F.,)S X1701(``A)S X1871(Data)S X2091(Model)S X2385(for)S X2534(Programming)S X3117(Support)S X3467(Environments)S X4061(and)S X4238(its)S X4366(Application,'')S X4962(in)S X4392 V X10 I X970(Automated)S X1438(Tools)S X1696(for)S X1848(Information)S X2361(System)S X2673(Design)S X2991(and)S X3176(Development)S X10 R X3702(,)S X3761(ed.)S X3914(Hans-Jochen)S X4463(Schneider)S X4896(and)S X4512 V X970(Anthony)S X1350(I.)S X1438(Wasserman,)S X1958(North-Holland)S X2576(Publishing)S X3035(Company,)S X3479(Amsterdam,)S X4000(1982.)S X4668 V X720(12.)S X970(Heckel,)S X1328(Paul,)S X1582(``A)S X1771(Technique)S X2243(for)S X2410(Isolating)S X2811(Di)S X2911 H X (f)show 10 -.5 mul h (f)show X10 R X2972(erences)S X3321(Between)S X3721(Files,'')S X10 I X4058(Communications)S X4788(of)S X4918(the)S X4788 V X970(ACM)S X10 R X1181(,)S X1236(vol.)S X1419(21,)S X1574(no.)S X1729(4,)S X1834(pp.)S X1989(264-268,)S X2377(April)S X2618(1978.)S X4944 V X720(13.)S X970(Tichy,)S X1270(Walter)S X1583(F.,)S X1731(``The)S X1994(String-to-String)S X2670(Correction)S X3139(Problem)S X3520(with)S X3740(Block)S X4021(Moves,'')S X10 I X4426(ACM)S X4679(Transac-)S X5064 V X970(tions)S X1195(on)S X1325(Computer)S X1755(Systems)S X10 R X2071(,)S X2126(vol.)S X2309(2,)S X2414(no.)S X2569(4,)S X2674(pp.)S X2829(309-321,)S X3217(Nov.)S X3444(1984.)S X7950 V X0(-)S X7950 V XEP X%%Trailer X%%DocumentFonts: Courier Times-Roman Times-Bold Times-Italic Symbol Troff X%%Pages: 20 END_OF_FILE if test 63654 -ne `wc -c <'rcs.ps.part2'`; then echo shar: \"'rcs.ps.part2'\" unpacked with wrong size! fi # end of 'rcs.ps.part2' fi echo shar: End of archive 10 $of 11$. cp /dev/null ark10isdone MISSING="" for I in 1 2 3 4 5 6 7 8 9 10 11 ; do if test ! -f ark${I}isdone ; then MISSING="${MISSING} ${I}" fi done if test "${MISSING}" = "" ; then echo You have unpacked all 11 archives. rm -f ark[1-9]isdone ark[1-9][0-9]isdone else echo You still need to unpack the following archives: echo " " ${MISSING} fi ## End of shell archive. exit 0