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1.1 root 1: /*
2: * read the configuration file
3: * name id addr ...
4: * addr pieces are just numbers here;
5: * it's up to the address drivers to interpret
6: */
7:
8: #include <fio.h>
9: #include <libc.h>
10: #include <ctype.h>
11: #include "mkconf.h"
12:
13: /*
14: * table of address-type drivers
15: * entries should match with the numbers above
16: */
17:
18: int nosyntax(), nofixup(), noputaddr(), noputvec();
19: int sbisyntax(), sbifixup(), sbiputaddr(), nexputvec();
20: int vbisyntax(), vbifixup(), vbiputaddr();
21: int cntsyntax(), cntputaddr();
22: int ubasyntax(), ubafixup(), ubaputaddr(), ubaputvec();
23: int subsyntax(), subputaddr();
24: int mbasyntax(), mbafixup(), mbaputaddr();
25: int prmputaddr();
26: int mscpsyntax(), mscpfixup(), mscpputaddr();
27: int nobussyntax(), nobusfixup(), nobusputaddr(), nobusputvec();
28:
29: struct acode acode[] = {
30: nosyntax, nofixup, noputaddr, noputvec, /* ANONE */
31: cntsyntax, nofixup, cntputaddr, noputvec, /* ACNT */
32: sbisyntax, sbifixup, sbiputaddr, nexputvec, /* ASBI */
33: mbasyntax, mbafixup, mbaputaddr, noputvec, /* AMBA */
34: ubasyntax, ubafixup, ubaputaddr, ubaputvec, /* AUBA */
35: subsyntax, nofixup, subputaddr, noputvec, /* ASUB */
36: vbisyntax, vbifixup, vbiputaddr, nexputvec, /* AVBI */
37: cntsyntax, nofixup, prmputaddr, noputvec, /* APARAM */
38: mscpsyntax, mscpfixup, mscpputaddr, noputvec, /* AMSCP */
39: nobussyntax, nobusfixup, nobusputaddr, nobusputvec, /* ANOBUS */
40: };
41:
42: #define NATYPE (sizeof(acode)/sizeof(acode[0]))
43:
44: #define MAXARGS (NADDR*2+2)
45:
46: readconf(f)
47: char *f;
48: {
49: int fd;
50: register char *p;
51: char *args[MAXARGS];
52: register Dev *dp;
53: register int n;
54: Mdev *mp;
55: Mdev *mdlook();
56:
57: if ((fd = open(f, 0)) < 0) {
58: perror(f);
59: exit(1);
60: }
61: while ((p = Frdline(fd)) != NULL) {
62: while (isspace(*p))
63: p++;
64: if (*p == '#' || *p == 0)
65: continue;
66: if ((n = crack(p, args, MAXARGS)) <= 1) {
67: fprint(STDERR, "silly conf line: %s\n", p);
68: errs++;
69: continue;
70: }
71: if (spconf(args, n))
72: continue;
73: if ((mp = mdlook(args[0])) == NULL) {
74: fprint(STDERR, "unknown device %s\n", p);
75: errs++;
76: continue;
77: }
78: if (0 > mp->atype || mp->atype >= NATYPE) {
79: fprint(STDERR, "%s gok atype %d\n", mp->name, mp->atype);
80: errs++;
81: continue;
82: }
83: if ((dp = (Dev *)ealloc(sizeof(Dev))) == NULL) {
84: fprint(STDERR, "out of memory\n");
85: exit(1);
86: }
87: dp->mdev = mp;
88: dp->id = nconv(args[1]);
89: dp->parent = NULL;
90: if ((*acode[mp->atype].syntax)(dp, &args[2], n-2)) {
91: free((char *)dp);
92: continue;
93: }
94: dinsert(dp);
95: }
96: close(fd);
97: }
98:
99: /*
100: * insert a device into the list of those configured
101: * check for duplicates, cluster and order
102: * different instances of the same device
103: */
104: dinsert(dp)
105: register Dev *dp;
106: {
107: register Dev *ep, *bp;
108:
109: if (dlist == NULL) {
110: dlist = dp;
111: dp->next = NULL;
112: return;
113: }
114: bp = NULL;
115: for (ep = dlist; ep; bp = ep, ep = ep->next)
116: if (dp->mdev == ep->mdev)
117: break;
118: for (; ep && dp->mdev == ep->mdev; bp = ep, ep = ep->next) {
119: if (dp->id == ep->id) {
120: fprint(STDERR, "%s %d: dup device\n", dp->mdev->name, dp->id);
121: errs++;
122: return;
123: }
124: if (dp->id < ep->id)
125: break;
126: }
127: if (bp == NULL) {
128: dp->next = dlist;
129: dlist = dp;
130: }
131: else {
132: dp->next = bp->next;
133: bp->next = dp;
134: }
135: }
136:
137: /*
138: * things in the conf file
139: * that aren't strictly devices
140: * the hard-coded names here take precedence over
141: * names of devices and drivers
142: * keep these as few as possible, please
143: * root fs driver minor
144: * swap driver minor size
145: * dump drname minor low size
146: */
147:
148: int
149: spconf(a, n)
150: register char **a;
151: int n;
152: {
153:
154: if (strcmp(a[0], "root") == 0) {
155: cfroot(a, n);
156: return (1);
157: }
158: if (strcmp(a[0], "swap") == 0) {
159: cfswap(a, n);
160: return (1);
161: }
162: if (strcmp(a[0], "dump") == 0) {
163: cfdump(a, n);
164: return (1);
165: }
166: return (0); /* not a special; perhaps a device */
167: }
168:
169: Mdev *rootfmp, *rootdmp;
170: int rootfs;
171: int rootmaj, rootmin;
172:
173: cfroot(a, n)
174: register char **a;
175: int n;
176: {
177: register Mdev *fmp, *dmp;
178:
179: if (n != 4) {
180: fprint(STDERR, "bad root spec\n");
181: errs++;
182: return;
183: }
184: if ((fmp = mdlook(a[1])) == NULL) {
185: fprint(STDERR, "%s: unknown root fs\n", a[1]);
186: errs++;
187: return;
188: }
189: if ((dmp = mdlook(a[2])) == NULL) {
190: fprint(STDERR, "%s: unknown root device\n", a[2]);
191: errs++;
192: return;
193: }
194: rootfmp = fmp;
195: rootdmp = dmp;
196: rootmin = nconv(a[3]);
197: }
198:
199: #define NSWAP 10
200:
201: Swapdev swaptab[NSWAP];
202: int nswapdev;
203: int swapmaj, swapmin; /* set elsewhere to `drum' */
204:
205: cfswap(a, n)
206: register char **a;
207: int n;
208: {
209: register Mdev *mp;
210:
211: if (n < 4) {
212: fprint(STDERR, "bad swap spec\n");
213: errs++;
214: return;
215: }
216: if ((mp = mdlook(a[1])) == NULL) {
217: fprint(STDERR, "%s: unknown swap device\n");
218: errs++;
219: return;
220: }
221: if (nswapdev >= NSWAP) {
222: fprint(STDERR, "too many swap devices\n");
223: errs++;
224: return;
225: }
226: swaptab[nswapdev].mp = mp;
227: swaptab[nswapdev].minor = nconv(a[2]);
228: swaptab[nswapdev].size = nconv(a[3]);
229: nswapdev++;
230: }
231:
232: char *dumprout;
233: int dumpunit;
234: long dumplow, dumpsize;
235:
236: cfdump(a, n)
237: register char **a;
238: int n;
239: {
240: if (n != 5) {
241: fprint(STDERR, "bad dump spec\n");
242: errs++;
243: return;
244: }
245: dumprout = estrdup(a[1]);
246: dumpunit = nconv(a[2]);
247: dumplow = nconv(a[3]);
248: dumpsize = nconv(a[4]);
249: }
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