mknod.2

操作系统设计与实现源码

%!PS-Adobe-1.0
%%Creator: devps (Pipeline Associates, Inc.)
%%CreationDate: Fri Sep 13 13:05:46 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 def
systemdict /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 add
currentpoint pop X
m}bind def
/H{//res div
0 transform X round X itransform pop
currentpoint X pop
moveto}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
 fill
gr}bind def
1 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} if
end
/BP{
save mark devps begin m0
/DocumentInitState [ matrix currentmatrix currentlinewidth currentlinecap
currentlinejoin currentdash currentgray currentmiterlimit ] cvx def
}bind def
/EP{
end cleartomark restore showpage}def

/Encoding-1 256 array def
0 1 255 {Encoding-1 exch /.notdef put} for
Encoding-1 8#301 StandardEncoding 8#101 26 getinterval putinterval %A-B
Encoding-1 8#341 StandardEncoding 8#141 26 getinterval putinterval %a-b
Encoding-1 8#241 StandardEncoding 8#301 16 getinterval putinterval %accents
Encoding-1 8#373 StandardEncoding 8#365 1 getinterval putinterval %dotlessi
Encoding-1
dup 8#41 /copyright put
dup 8#42 /registered put
dup 8#43 /trademark put
dup 8#44 /logicalnot put
dup 8#45 /Eth put
dup 8#46 /eth put
dup 8#47 /Thorn put
dup 8#50 /thorn put
dup 8#51 /brokenbar put
dup 8#52 /degree put
dup 8#53 /divide put
dup 8#54 /multiply put
dup 8#55 /minus put
dup 8#56 /onehalf put
dup 8#57 /onequarter put
dup 8#60 /threequarters put
dup 8#101 /Aacute put
dup 8#102 /Acircumflex put
dup 8#103 /Adieresis put
dup 8#104 /Agrave put
dup 8#105 /Aring put
dup 8#106 /Atilde put
dup 8#107 /Ccedilla put
dup 8#110 /Eacute put
dup 8#111 /Ecircumflex put
dup 8#112 /Edieresis put
dup 8#113 /Egrave put
dup 8#114 /Iacute put
dup 8#115 /Icircumflex put
dup 8#116 /Idieresis put
dup 8#117 /Igrave put
dup 8#120 /Ntilde put
dup 8#121 /Oacute put
dup 8#122 /Ocircumflex put
dup 8#123 /Odieresis put
dup 8#124 /Ograve put
dup 8#125 /Otilde put
dup 8#126 /Scaron put
dup 8#127 /Uacute put
dup 8#130 /Ucircumflex put
dup 8#131 /Udieresis put
dup 8#132 /Ugrave put
dup 8#133 /Ydieresis put
dup 8#134 /Zcaron put
dup 8#135 /aacute put
dup 8#136 /acircumflex put
dup 8#137 /adieresis put
dup 8#140 /agrave put
dup 8#141 /aring put
dup 8#142 /atilde put
dup 8#143 /ccedilla put
dup 8#144 /eacute put
dup 8#145 /ecircumflex put
dup 8#146 /edieresis put
dup 8#147 /egrave put
dup 8#150 /iacute put
dup 8#151 /icircumflex put
dup 8#152 /idieresis put
dup 8#153 /igrave put
dup 8#154 /ntilde put
dup 8#155 /oacute put
dup 8#156 /ocircumflex put
dup 8#157 /odieresis put
dup 8#160 /ograve put
dup 8#161 /otilde put
dup 8#162 /scaron put
dup 8#163 /uacute put
dup 8#164 /ucircumflex put
dup 8#165 /udieresis put
dup 8#166 /ugrave put
dup 8#167 /ydieresis put
dup 8#170 /zcaron put
pop

/Enc-dict 30 dict def
Enc-dict /tmpstr1 50 string put
Enc-dict /tmpstr2 50 string put
Enc-dict /tmpstr3 50 string dup (Encoding-) exch cvs pop put
/AEnc-def { % arguments: the original font's name, encoding nr
Enc-dict begin
tmpstr2 cvs /Enc-no exch def % Remember the number in a string
dup /OrigName exch def % remember the name
findfont 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
} forall
newdict begin
/Encoding
  tmpstr3 9 Enc-no putinterval tmpstr3 0 9 Enc-no length add getinterval
  cvn load
  def % Replace encoding
currentdict /UniqueID known
{ /UniqueID UniqueID Enc-no cvi 49999 mul add def } if % Derive New UniqueID
end % newdict
/FNlength OrigName tmpstr1 cvs length def % convert name, remember length
FNlength 1 add Enc-no length add string
dup 0 OrigName tmpstr1 cvs putinterval
dup FNlength (-) putinterval
dup FNlength 1 add Enc-no putinterval
dup 0 tmpstr1 0 FNlength getinterval putinterval % Add old name
cvn dup newdict /FontName 3 2 roll put newdict definefont
end % Enc-dict
} def
/Times-Roman 1 AEnc-def pop
/R-1{/Times-Roman-1 FF}def
/R{/Times-Roman FF}def
/B{/Times-Bold FF}def
/I{/Times-Italic FF}def
%%EndProlog
%%Page: 1 1
BP
/slant 0 def
/height 0 def
480 V
10 R
(MKNOD)381 720 A
1109(\()S
1151(2)S
1209(\))S
2696(Eighth)S
(Edition)296 2989 A
(MKNOD)381 4738 A
5127(\()S
5169(2)S
5227(\))S
960 V
9 R
720(N)S
722(NA)S
790(AM)S
858(ME)S
940(E)S
1080 V
10 R
(mknod,)303 1080 A
1408(mk\256fo)S
10 R-1
1701(-)S
10 R
1783(make)S
2026(a)S
2096(special)S
2401(\256le)S
1248 V
9 R
720(S)S
722(SY)S
774(YN)S
842(NO)S
910(OP)S
978(PS)S
1030(SI)S
1082(IS)S
1115(S)S
1368 V
10 B
1080(#include)S
1482(<sys/types.h>)S
1488 V
1080(#include)S
1482(<unistd.h>)S
1608 V
1080(#include)S
1482(<sys/stat.h>)S
1848 V
1080(int)S
1236(mknod\(const)S
1834(char)S
2068(*)S
10 I
2118(path)S
10 B
2296(,)S
2359(mode_t)S
10 I
2716(mode)S
10 B
2934(,)S
2997(dev_t)S
10 I
3270(dev)S
10 B
3410(\))S
1968 V
1080(int)S
1236(mk\256fo\(const)S
1812(char)S
2046(*)S
10 I
2096(path)S
10 B
2274(,)S
2337(mode_t)S
10 I
2694(mode)S
10 B
2912(\))S
2136 V
9 R
720(D)S
722(DE)S
790(ES)S
848(SC)S
900(CR)S
962(RI)S
1024(IP)S
1057(PT)S
1109(TI)S
1167(IO)S
1200(ON)S
1268(N)S
2256 V
10 B
1080(Mknod)S
10 R
1421(creates)S
1730(a)S
1803(new)S
2000(\256le)S
2158(whose)S
2444(name)S
2691(is)S
10 I
2787(path.)S
10 R
3019(The)S
3205(mode)S
3457(of)S
3570(the)S
3722(new)S
3919(\256le)S
4077(\(including)S
4519(special)S
4828(\256le)S
4986(bits\))S
5194(is)S
2376 V
(initialized)403 1080 A
1513(from)S
10 I
1739(mode)S
10 R
1965(,)S
2020(as)S
2134(de\256ned)S
2460(in)S
10 I
2568(<sys/stat.h>)S
10 R
3083(.)S
3163(\(The)S
3384(protection)S
3822(part)S
4009(of)S
4123(the)S
4275(mode)S
4527(is)S
4623(modi\256ed)S
5009(by)S
5138(the)S
2496 V
1080(process's)S
1483(mode)S
1734(mask)S
1974(\(see)S
10 B
2165(umask)S
10 R
(\(2\)\)\).)211 2450 A
2714(The)S
2899(\256rst)S
3084(block)S
3335(pointer)S
3648(of)S
3760(the)S
(i-node)257 3911 A
4196(is)S
(initialized)403 4291 A
4722(from)S
10 I
4947(dev)S
10 R
5116(and)S
2616 V
1080(is)S
1172(used)S
1381(to)S
1484(specify)S
1800(which)S
2071(device)S
2359(the)S
2507(special)S
2812(\256le)S
2966(refers)S
3222(to.)S
2784 V
1080(If)S
1176(mode)S
1427(indicates)S
1813(a)S
1886(block)S
2137(or)S
2249(character)S
2648(special)S
2956(\256le,)S
10 I
3138(dev)S
10 R
3306(is)S
3401(the)S
3552(device)S
3843(number)S
4178(of)S
4290(a)S
4363(character)S
4762(or)S
4874(block)S
5126(I/O)S
2904 V
1080(device.)S
1429(The)S
1622(low)S
1809(eight)S
2045(bits)S
2225(of)S
2344(the)S
2502(device)S
2800(number)S
3142(hold)S
3355(the)S
3513(minor)S
3788(device)S
4086(number)S
4428(that)S
4614(selects)S
4918(a)S
4998(device)S
3024 V
(among)273 1080 A
1387(the)S
1544(devices)S
(governed)374 1880 A
2288(by)S
2422(the)S
2579(same)S
2820(driver.)S
3145(The)S
3336(driver)S
3611(is)S
3712(selected)S
4071(by)S
4205(the)S
4362(major)S
4631(device)S
4929(number,)S
3144 V
1080(the)S
1228(next)S
1426(eight)S
1652(bits)S
1822(of)S
1931(the)S
2079(device)S
2367(number.)S
3312 V
1080(If)S
10 I
1184(mode)S
10 R
1438(does)S
1658(not)S
1823(indicate)S
2179(a)S
2261(block)S
2521(special)S
2838(or)S
2959(character)S
3367(special)S
3684(device,)S
10 I
4009(dev)S
10 R
4186(is)S
(ignored.)332 4290 A
4684(\(For)S
4895(example,)S
3432 V
1080(when)S
1323(creating)S
1673(a)S
1743(``\256fo'')S
2044(special)S
2349(\256le.\))S
3600 V
10 B
1080(Mknod)S
10 R
1418(may)S
1616(be)S
(invoked)323 1736 A
2084(only)S
2287(by)S
2412(the)S
2560(super-user,)S
3030(unless)S
3306(it)S
3387(is)S
3479(being)S
3727(used)S
3936(to)S
4039(create)S
4306(a)S
4376(\256fo.)S
3768 V
1080(The)S
1262(call)S
10 B
1433(mk\256fo\()S
10 I
1747(path)S
10 B
1933(,)S
10 I
1983(mode)S
10 B
2209(\))S
10 R
2268(is)S
2360(equivalent)S
2804(to)S
3936 V
10 B
1440(mknod\()S
10 I
1776(path)S
10 B
1962(,)S
2012(\()S
10 I
2046(mode)S
10 B
2297(&)S
(0777\))234 2406 A
2665(|)S
2712(S_IFIFO,)S
3148(0\))S
4104 V
9 R
720(R)S
722(RE)S
784(ET)S
842(TU)S
900(UR)S
968(RN)S
1030(N)S
1121(V)S
1123(VA)S
1191(AL)S
1259(LU)S
1317(UE)S
1385(E)S
4224 V
10 R
(Upon)223 1080 A
(successful)414 1330 A
1771(completion)S
2250(a)S
2322(value)S
2567(of)S
2678(0)S
2755(is)S
2849(returned.)S
3262(Otherwise,)S
3729(a)S
3801(value)S
4046(of)S
10 R-1
4158(-)S
10 R
4215(1)S
4293(is)S
4388(returned)S
4752(and)S
10 B
(errno)241 4925 A
10 R
5194(is)S
4344 V
1080(set)S
1217(to)S
1320(indicate)S
1664(the)S
1812(error.)S
4512 V
9 R
720(E)S
722(ER)S
780(RR)S
842(RO)S
904(OR)S
972(RS)S
1034(S)S
4632 V
10 B
1080(Mknod)S
10 R
(will)157 1418 A
1600(fail)S
1760(and)S
1930(the)S
2078(\256le)S
2232(mode)S
(will)157 2480 A
2662(be)S
2782(unchanged)S
3242(if:)S
4800 V
1080([ENOTDIR])S
1830(A)S
(component)446 1928 A
2399(of)S
2508(the)S
2656(path)S
2854(pre\256x)S
3114(is)S
3206(not)S
3359(a)S
3429(directory.)S
4968 V
([ENAMETOOLONG])916 1080 A
5088 V
1830(The)S
2012(path)S
2210(name)S
(exceeds)319 2453 A
2797(PATH_MAX)S
3371(characters.)S
5256 V
1080([ENOENT])S
1830(A)S
(component)446 1928 A
2399(of)S
2508(the)S
2656(path)S
2854(pre\256x)S
3114(does)S
3323(not)S
3476(exist.)S
5424 V
1080([EACCES])S
1830(Search)S
2130(permission)S
2596(is)S
2688(denied)S
2981(for)S
3124(a)S
(component)446 3194 A
3665(of)S
3774(the)S
3922(path)S
4120(pre\256x.)S
5592 V
1080([ELOOP])S
1830(Too)S
2033(many)S
2297(symbolic)S
2706(links)S
2942(were)S
(encountered)492 3180 A
3713(in)S
3833(translating)S
4300(the)S
4465(pathname.)S
4948(\(Minix-)S
5712 V
1830(vmd\))S
5880 V
1080([EPERM])S
1830(The)S
2012(process's)S
2412(effective)S
2791(user)S
2984(ID)S
3116(is)S
3208(not)S
3361(super-user.)S
6048 V
1080([EIO])S
1830(An)S
1978(I/O)S
2138(error)S
2360(occurred)S
2738(while)S
2987(making)S
3313(the)S
3461(directory)S
3850(entry)S
4082(or)S
4191(allocating)S
4613(the)S
(inode.)248 4761 A
6216 V
1080([ENOSPC])S
1830(The)S
2039(directory)S
2455(in)S
2585(which)S
2883(the)S
3058(entry)S
3317(for)S
3488(the)S
3664(new)S
(node)195 3885 A
4133(is)S
4253(being)S
(placed)263 4529 A
(cannot)268 4845 A
5166(be)S
6336 V
1830(extended)S
(because)319 2218 A
2562(there)S
2789(is)S
2881(no)S
(space)224 3006 A
3255(left)S
3415(on)S
3540(the)S
3688(\256le)S
3842(system)S
4146(containing)S
4595(the)S
4743(directory.)S
6504 V
1080([ENOSPC])S
1830(There)S
2091(are)S
2240(no)S
2365(free)S
(inodes)262 2548 A
2835(on)S
2960(the)S
3108(\256le)S
3262(system)S
3566(on)S
3691(which)S
3962(the)S
(node)195 4110 A
4330(is)S
4422(being)S
4670(created.)S
6672 V
1080([EROFS])S
1830(The)S
2012(named)S
2305(\256le)S
2459(resides)S
2764(on)S
2889(a)S
2959(read-only)S
3370(\256le)S
3524(system.)S
6840 V
1080([EEXIST])S
1830(The)S
2012(named)S
2305(\256le)S
2459(exists.)S
7008 V
1080([EFAULT])S
10 I
1830(Path)S
10 R
2045(points)S
2315(outside)S
2630(the)S
2778(process's)S
3178(allocated)S
3567(address)S
(space.)249 3894 A
7176 V
9 R
720(S)S
722(SE)S
774(EE)S
832(E)S
913(A)S
915(AL)S
983(LS)S
1041(SO)S
1093(O)S
7296 V
10 B
1080(chmod)S
10 R
1371(\(2\),)S
10 B
1539(stat)S
10 R
1696(\(2\),)S
10 B
1864(umask)S
10 R
2149(\(2\).)S
7903 V
720(Page)S
941(1)S
2669(\()S
2711(May)S
2920(23,)S
(1986)200 3070 A
3278(\))S
4455(September)S
4911(13,)S
(1996)200 5061 A
8143 V
EP
%%Trailer
%%DocumentFonts: Times-Roman Times-Bold Times-Italic
%%Pages: 1