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📄 mt.1

📁 操作系统设计与实现源码
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%!PS-Adobe-1.0%%Creator: devps (Pipeline Associates, Inc.)%%CreationDate: Fri Sep 13 13:04:08 1996%%Pages: (atend)%%DocumentFonts: (atend)/devps 180 dict def devps begin/res 10.000000 def/y_offset 843 def/X{exch}bind def/mm {transform round X round X itransform} bind def/r{rmoveto}bind def/m{moveto}bind def/l{lineto}bind def/rl{rlineto}bind def/st{stroke}bind def/gs{gsave}bind def/gr{grestore}bind def/cp{currentpoint}bind def/np{newpath}bind def/ct{curveto}bind defsystemdict /setpacking known { /savepacking currentpacking def true setpacking } if/m0{0 0 moveto}bind def/xc{//res div}bind def/yc{//res neg div //y_offset add}bind def/lc{yc X xc X l st}bind def/mc{yc X xc X m}bind def/el{gs /a X def a div 1 X scale cp np a xc 2 div 0 360 arc st gr}bind def/ar{cp 7 2 roll np xc 5 1 roll atan 3 1 roll atan X arc st}bind def/sp{yc X xc X 6 2 roll yc X xc X 6 2 roll yc X xc X 6 2 roll ct}bind def/V{//res neg div //y_offset addcurrentpoint pop Xm}bind def/H{//res div0 transform X round X itransform popcurrentpoint X popmoveto}bind def/h{//res div 0 r}bind def/v{//res neg div 0 X r}bind def/S{X H show}bind def/A{H //res div 1 index stringwidth pop sub 1 index length div 0 3 2 roll ashow}bind def/psize 10 def/height 0 def/cheight { height 0 ne { height } { psize } ifelse } bind def/slant 0 def/FF{findfont X dup 30 div 0 mm pop setlinewidth /psize X def    [psize 0 cheight slant sin slant cos div mul cheight 0 0]    makefont setfont}bind def/shade{gs /dy X def /dx X def np m 0 /dy rl /dx 0 rl 0 /dy neg rl /dx neg 0 rl closepath .9 setgray fillgr}bind def1 setlinecap/resolution res 72 mul def/startFig {	/SavedState save def	userdict maxlength dict begin	currentpoint transform	DocumentInitState setmiterlimit setgray setdash setlinejoin setlinecap		setlinewidth setmatrix	itransform moveto	/ury exch def	/urx exch def	/lly exch def	/llx exch def	/y exch 72 mul resolution div def	/x exch 72 mul resolution div def		currentpoint /cy exch def /cx exch def	/sx x urx llx sub div def	/sy y ury lly sub div def	sx sy scale	cx sx div llx sub	cy sy div ury sub translate		/DefFigCTM matrix currentmatrix def	/initmatrix {		DefFigCTM setmatrix	} def	/defaultmatrix {		DefFigCTM exch copy	} def	/initgraphics {		DocumentInitState setmiterlimit setgray setdash 			setlinejoin setlinecap setlinewidth setmatrix		DefFigCTM setmatrix	} def	/showpage {		initgraphics	} def}bind  def/clipFig {	currentpoint 6 2 roll	newpath 4 copy	4 2 roll moveto	6 -1 roll exch lineto	exch lineto	exch lineto	closepath clip	newpath	moveto}bind  def/doclip { llx lly urx ury clipFig } def/endFig {	end SavedState restore}bind  def/globalstart {	fontnum psize slant height resolution currentpoint 	pagesave restore gsave }bind  def/globalend {	grestore moveto	/resolution exch def /height exch def	/slant exch def /psize exch def /fontnum exch def	F	/pagesave save def}bind  def/fontnum 1 def systemdict /setpacking known { savepacking setpacking} ifend/BP{save mark devps begin m0/DocumentInitState [ matrix currentmatrix currentlinewidth currentlinecapcurrentlinejoin currentdash currentgray currentmiterlimit ] cvx def}bind def/EP{end cleartomark restore showpage}def/Encoding-1 256 array def0 1 255 {Encoding-1 exch /.notdef put} forEncoding-1 8#301 StandardEncoding 8#101 26 getinterval putinterval %A-BEncoding-1 8#341 StandardEncoding 8#141 26 getinterval putinterval %a-bEncoding-1 8#241 StandardEncoding 8#301 16 getinterval putinterval %accentsEncoding-1 8#373 StandardEncoding 8#365 1 getinterval putinterval %dotlessiEncoding-1dup 8#41 /copyright putdup 8#42 /registered putdup 8#43 /trademark putdup 8#44 /logicalnot putdup 8#45 /Eth putdup 8#46 /eth putdup 8#47 /Thorn putdup 8#50 /thorn putdup 8#51 /brokenbar putdup 8#52 /degree putdup 8#53 /divide putdup 8#54 /multiply putdup 8#55 /minus putdup 8#56 /onehalf putdup 8#57 /onequarter putdup 8#60 /threequarters putdup 8#101 /Aacute putdup 8#102 /Acircumflex putdup 8#103 /Adieresis putdup 8#104 /Agrave putdup 8#105 /Aring putdup 8#106 /Atilde putdup 8#107 /Ccedilla putdup 8#110 /Eacute putdup 8#111 /Ecircumflex putdup 8#112 /Edieresis putdup 8#113 /Egrave putdup 8#114 /Iacute putdup 8#115 /Icircumflex putdup 8#116 /Idieresis putdup 8#117 /Igrave putdup 8#120 /Ntilde putdup 8#121 /Oacute putdup 8#122 /Ocircumflex putdup 8#123 /Odieresis putdup 8#124 /Ograve putdup 8#125 /Otilde putdup 8#126 /Scaron putdup 8#127 /Uacute putdup 8#130 /Ucircumflex putdup 8#131 /Udieresis putdup 8#132 /Ugrave putdup 8#133 /Ydieresis putdup 8#134 /Zcaron putdup 8#135 /aacute putdup 8#136 /acircumflex putdup 8#137 /adieresis putdup 8#140 /agrave putdup 8#141 /aring putdup 8#142 /atilde putdup 8#143 /ccedilla putdup 8#144 /eacute putdup 8#145 /ecircumflex putdup 8#146 /edieresis putdup 8#147 /egrave putdup 8#150 /iacute putdup 8#151 /icircumflex putdup 8#152 /idieresis putdup 8#153 /igrave putdup 8#154 /ntilde putdup 8#155 /oacute putdup 8#156 /ocircumflex putdup 8#157 /odieresis putdup 8#160 /ograve putdup 8#161 /otilde putdup 8#162 /scaron putdup 8#163 /uacute putdup 8#164 /ucircumflex putdup 8#165 /udieresis putdup 8#166 /ugrave putdup 8#167 /ydieresis putdup 8#170 /zcaron putpop/Enc-dict 30 dict defEnc-dict /tmpstr1 50 string putEnc-dict /tmpstr2 50 string putEnc-dict /tmpstr3 50 string dup (Encoding-) exch cvs pop put/AEnc-def { % arguments: the original font's name, encoding nrEnc-dict begintmpstr2 cvs /Enc-no exch def % Remember the number in a stringdup /OrigName exch def % remember the namefindfont dup maxlength dict /newdict exch def % get dictionary for new font{ exch dup /FID ne   { exch newdict 3 1 roll put }   { pop pop } % Ignore FID   ifelse} forallnewdict begin/Encoding  tmpstr3 9 Enc-no putinterval tmpstr3 0 9 Enc-no length add getinterval  cvn load  def % Replace encodingcurrentdict /UniqueID known{ /UniqueID UniqueID Enc-no cvi 49999 mul add def } if % Derive New UniqueIDend % newdict/FNlength OrigName tmpstr1 cvs length def % convert name, remember lengthFNlength 1 add Enc-no length add stringdup 0 OrigName tmpstr1 cvs putintervaldup FNlength (-) putintervaldup FNlength 1 add Enc-no putintervaldup 0 tmpstr1 0 FNlength getinterval putinterval % Add old namecvn dup newdict /FontName 3 2 roll put newdict definefontend % Enc-dict} def/Times-Roman 1 AEnc-def pop/R-1{/Times-Roman-1 FF}def/Times-Bold 1 AEnc-def pop/B-1{/Times-Bold-1 FF}def/R{/Times-Roman FF}def/B{/Times-Bold FF}def/I{/Times-Italic FF}def%%EndProlog%%Page: 1 1BP/slant 0 def/height 0 def480 V10 R720(MT)S879(\()S921(1)S979(\))S2696(Eighth)S(Edition)296 2989 A4968(MT)S5127(\()S5169(1)S5227(\))S960 V9 R720(N)S722(NA)S790(AM)S858(ME)S940(E)S1080 V10 R1080(mt)S10 R-11211(-)S10 R1293(magnetic)S1687(tape)S1880(control)S1248 V9 R720(S)S722(SY)S774(YN)S842(NO)S910(OP)S978(PS)S1030(SI)S1082(IS)S1115(S)S1368 V10 B1080(mt)S10 R1236([)S10 B-11270(-)S10 B1327(f)S10 I1399(device)S10 R1665(])S1737([)S10 I(count)223 1771 A10 R2002(])S1536 V9 R720(D)S722(DE)S790(ES)S848(SC)S900(CR)S962(RI)S1024(IP)S1057(PT)S1109(TI)S1167(IO)S1200(ON)S1268(N)S1656 V10 B1080(Mt)S10 R1242(is)S1342(a)S1420(user)S(interface)354 1621 A2008(to)S2119(the)S2275(magnetic)S2677(tape)S2878(commands)S3346(described)S3765(in)S10 B3876(mtio)S10 R4072(\(4\).)S4274(It)S4370(allows)S4667(one)S4846(to)S(space)224 4958 A5216(a)S1776 V1080(tape)S1273(forwards)S1657(or)S1766(backwards,)S2247(write)S2480(end)S2650(of)S2759(\256le)S2913(markers,)S3288(etc.)S1944 V1080(With)S1314(the)S10 B-11470(-)S10 B1527(f)S10 R1595(option)S1885(a)S1964(tape)S2166(device)S2463(can)S2637(be)S2766(named,)S3093(otherwise)S3519(the)S3676(environment)S4218(variable)S10 B4577(TAPE)S10 R4880(is)S4981(used)S5199(if)S2064 V1080(set,)S1252(otherwise)S1679(the)S1837(default)S2152(device)S10 B2450(/dev/nrst4)S10 R2916(is)S3018(assumed.)S3449(Standard)S(input)206 3842 A4083(is)S4185(used)S4404(if)S4501(the)S4659(tape)S4862(name)S5115(is)S5216(a)S2184 V1080(dash)S1291(\()S10 R-11325(-)S10 R1382(\).)S1493(The)S10 I(count)223 1677 A10 R1927(argument)S2334(is)S2428(used)S2639(to)S2744(tell)S2900(how)S3100(many)S3350(blocks)S3639(or)S3750(\256les)S3945(to)S(space)224 4050 A4301(or)S4412(how)S4612(many)S4863(\256le)S5020(mark-)S2304 V1080(ers)S1223(to)S1326(write.)S1609(It)S1696(may)S1894(be)S2014(a)S2084(C-style)S2400(decimal,)S2769(octal)S2990(or)S3099(hexadecimal)S3633(constant,)S4018(by)S4143(default)S4448("1".)S2472 V10 I(Command)413 1080 A10 R1523(is)S1620(the)S1773(action)S2049(to)S2157(perform,)S2537(it)S2623(may)S2826(be)S2952(one)S3128(of)S3243(the)S3397(following,)S3844(or)S3959(any)S(unambiguous)540 4135 A4706(pre\256x)S4972(\(like)S10 B5188(st)S2592 V10 R1080(for)S10 B1223(status)S10 R1475(\):)S2760 V10 B1080(eof,)S1259(weof)S10 R1830(Write)S10 I(count)223 2085 A10 R2333(end-of-\256le)S2784(markers.)S2928 V10 B1080(fsf)S10 R1830(Forward)S(space)224 2197 A10 I(count)223 2446 A10 R2694(\256le)S2848(markers.)S3096 V10 B1080(fsr)S10 R1830(Forward)S(space)224 2207 A10 I(count)223 2466 A10 R2724(records.)S3106(\(The)S3332(size)S3524(of)S3643(a)S3724(record)S4018(depends)S4383(on)S4519(the)S4678(tape,)S4907(and)S5088(may)S3216 V1830(even)S2045(be)S2165(variable,)S2540(depending)S2983(on)S3108(the)S3256(size)S3438(of)S3547(the)S3695(writes.\))S3384 V10 B1080(bsf)S10 R1830(Backwards)S(space)224 2306 A10 I(count)223 2558 A10 R2809(\256les.)S3055(The)S(count)223 3240 A3491(may)S3692(be)S3815(zero)S4017(to)S(backspace)414 4123 A4565(to)S4671(the)S4822(start)S5025(of)S5138(the)S3504 V1830(current)S2147(\256le.)S2357(\(A)S2495(tape)S2694(device)S2988(need)S3209(not)S(support)301 3368 A3700(backwards)S4161(movement,)S4640(or)S4754(may)S4957(be)S5082(very)S3624 V1830(slow)S2045(doing)S2298(it.)S2429(Rewinding)S2895(and)S3065(forward)S3410(spacing)S3742(may)S3940(be)S4060(better.\))S3792 V10 B1080(bsr)S10 R1830(Backwards)S(space)224 2316 A10 I(count)223 2578 A10 R2839(records.)S3224(The)S3419(tape)S3625(is)S(positioned)418 3730 A4187(after)S4412(the)S4574(last)S4753(block)S5015(of)S5138(the)S3912 V1830(previous)S2203(\256le)S2358(if)S(you)150 2446 A2622(hit)S2754(a)S2825(\256lemark)S3187(when)S3431(spacing)S3764(backwards.)S4271(The)S4454(block)S(count)223 4703 A4952(is)S5045(set)S5183(to)S4032 V1830(-1)S1939(to)S2042(indicate)S2386(that)S2562(the)S2710(driver)S2976(has)S3135(no)S3260(idea)S3453(where)S3725(it)S3806(is)S3898(on)S4023(the)S4171(previous)S4542(\256le.)S4200 V10 B1080(eom)S10 R1830(Forward)S(space)224 2197 A2446(to)S2549(the)S2697(end)S2867(of)S2976(media.)S4368 V10 B1080(rewind)S10 R1830(Rewind)S2168(the)S2316(tape.)S4536 V10 B1080(offline,)S1405(rewoffl)S10 R1830(Rewind)S2168(and)S2338(take)S2531(of\257ine.)S2869(This)S3073(may)S3271(cause)S3520(some)S3757(drives)S4028(to)S4131(eject)S4347(the)S4495(tape.)S4704 V10 B1080(status)S10 R1830(Shows)S2143(the)S2312(status)S2587(of)S2717(the)S2886(drive,)S3164(the)S3333(sense)S3597(key)S3788(of)S3918(the)S4087(last)S4273(SCSI)S4532(error,)S4800(current)S5132(\256le)S4824 V1830(number,)S2191(current)S2506(record)S2793(number,)S3154(residual)S(count)223 3502 A3754(if)S3845(the)S3997(last)S4166(command)S4590(that)S(encountered)492 4769 A4944 V1830(end-of-\256le,)S2306(and)S2476(the)S2624(current)S2935(block)S3183(size.)S5112 V10 B1080(retension)S10 R1830(Removes)S2229(tape)S2422(tension)S2737(by)S2862(winding)S3216(and)S3386(rewinding)S3819(the)S3967(tape)S4160(completely.)S5280 V10 B1080(erase)S10 R1830(Erases)S2119(the)S2267(tape)S2460(completely)S2932(and)S3102(rewinds)S3446(it.)S5448 V10 B1080(density)S10 R1830(Sets)S2035(the)S2195(density)S2522(code)S2749(to)S2865(read)S3077(or)S3199(write)S3445(the)S3606(tape)S3812(to)S10 I(count)223 3928 A10 R4159(.)S4247(Density)S4598(codes)S(supported)396 4865 A5568 V1830(depend)S2151(on)S2282(the)S2436(drive.)S2724(This)S2933(command)S3359(need)S3579(not)S3737(be)S3862(used)S4076(if)S4168(the)S4321(drive)S4558(senses)S4845(the)S4998(proper)S5688 V1830(density)S2145(on)S2270(read)S2469(and)S2639(can)S2804(only)S3007(write)S3240(one)S3410(density.)S5856 V10 B1080(blksize,)S1427(blocksize)S5976 V10 R1830(Sets)S2031(the)S2187(block)S2443(size)S2633(used)S2850(to)S2962(read)S3170(or)S3288(write)S3530(the)S3687(tape)S3889(to)S10 I(count)223 4001 A10 R4232(.)S4316(This)S4529(command)S4959(may)S5166(be)S6096 V1830(used)S2040(to)S2144(select)S2399(a)S2469(\256xed)S2695(block)S2943(size)S3125(for)S3268(a)S3338(variable)S3688(block)S3936(size)S4118(tape.)S4361(This)S(will)157 4565 A4747(speed)S5001(up)S5126(I/O)S6216 V1830(for)S1973(small)S2216(block)S2464(sizes.)S2735(Use)S2917(a)S2987(zero)S10 I(count)223 3186 A10 R3434(to)S3537(use)S3696(variable)S4046(sized)S4278(blocks)S4565(again.)S6384 V9 R720(E)S722(EN)S780(NV)S848(VI)S916(IR)S949(RO)S1011(ON)S1079(NM)S1147(ME)S1229(EN)S1287(NT)S1355(T)S6504 V10 B1080(TAPE)S10 R1830(Tape)S2057(drive)S2289(to)S2392(use)S2551(if)S2638(set.)S6672 V9 R720(F)S722(FI)S774(IL)S807(LE)S865(ES)S923(S)S6792 V10 B1080(/dev/nrst4)S10 R1830(Default)S2158(tape)S2351(device.)S6960 V9 R720(S)S722(SE)S774(EE)S832(E)S913(A)S915(AL)S983(LS)S1041(SO)S1093(O)S7080 V10 B1080(mtio)S10 R1276(\(4\),)S10 B1444(st)S10 R1517(\(4\).)S7248 V9 R720(A)S722(AU)S790(UT)S858(TH)S916(HO)S984(OR)S1052(R)S7368 V10 R1080(Kees)S1307(J.)S1396(Bot)S1566(\(kjb@cs.vu.nl\))S7903 V720(Page)S941(1)S4455(September)S4911(13,)S(1996)200 5061 A8143 VEP%%Trailer%%DocumentFonts: Times-Roman Times-Bold Times-Italic%%Pages: 1

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