43
|
1 /********************************************************************
|
|
2 * Virtual RBF - Random Block File Manager
|
|
3 *
|
|
4 * Shinji KONO (kono@ie.u-ryukyu.ac.jp) 2018/7/17
|
|
5 * GPL v1 license
|
|
6 */
|
|
7
|
|
8 #include <stdio.h>
|
|
9 #include <stdlib.h>
|
|
10 #include <unistd.h>
|
|
11 #include <sys/stat.h>
|
|
12 #include <sys/select.h>
|
|
13
|
|
14
|
|
15 /****************************
|
|
16 *
|
|
17 * Main entry point for RBF
|
|
18 *
|
|
19 lbra Open
|
|
20 lbra MakDir
|
|
21 lbra ChgDir
|
|
22 lbra Delete
|
|
23 lbra Seek
|
|
24 lbra Read
|
|
25 lbra Write
|
|
26 lbra ReadLn
|
|
27 lbra WriteLn
|
|
28 lbra GetStat
|
|
29 lbra SetStat
|
|
30 lbra Close
|
|
31 */
|
|
32
|
|
33
|
|
34 /*
|
|
35 * I$Create Entry Point
|
|
36 *
|
|
37 * Entry: A = access mode desired
|
|
38 * B = file attributes
|
|
39 * X = address of the pathlist
|
|
40 *
|
|
41 * Exit: A = pathnum
|
|
42 * X = last byte of pathlist address
|
|
43 *
|
|
44 * Error: CC Carry set
|
|
45 * B = errcode
|
|
46 */
|
|
47
|
|
48 #define MAXPAHTLEN 256
|
|
49
|
|
50 char * checkFileName(char *path, PathDesc *pd) {
|
|
51 char *p = path;
|
|
52 int maxlen = MAXPAHTLEN;
|
|
53 pd->lastChar = p;
|
|
54 while(*p!=0 && (*p&80)==0 && maxlen-->0) p++;
|
|
55 if (maxlen==MAXPAHTLEN) return 0;
|
|
56 pd->lastChar = p;
|
|
57 if (*p!=0) {
|
|
58 p = (char *)malloc(len+1);
|
|
59 strncpy(path,p, MAXPAHTLEN-maxlen);
|
|
60 }
|
|
61 return p;
|
|
62 }
|
|
63
|
|
64 int os9toUnixAttr(Byte attr) {
|
|
65 return "r+";
|
|
66 }
|
|
67
|
|
68 int vrbf_create(byte mode,Byte attr,char *path,PathDesc *pd) {
|
|
69 char *p = pd->unixName = checkFileName(path,pd);
|
|
70 if (p==0) return -1;
|
|
71 p->dir = 0;
|
|
72 p->fp = fopen(p->unixName,"w+"); // os9toUnixAttr(attr));
|
|
73 if (fd) return 0;
|
|
74 return -1;
|
|
75 }
|
|
76
|
|
77
|
|
78 /*
|
|
79 * I$Open Entry Point
|
|
80 *
|
|
81 * Entry: A = access mode desired
|
|
82 * X = address of the pathlist
|
|
83 *
|
|
84 * Exit: A = pathnum
|
|
85 * X = last byte of pathlist address
|
|
86 *
|
|
87 * Error: CC Carry set
|
|
88 * B = errcode
|
|
89 */
|
|
90
|
|
91 int vrbf_open(byte mode,char *path, PathDesc *pd) {
|
|
92 char *p = pd->unixName = checkFileName(path,pd);
|
|
93 if (p==0) return -1;
|
|
94 struct stat buf;
|
|
95 if (stat(p,&buf)!=0) return -1;
|
|
96 if ((buf.st_mode & S_IFMT) == S_IFDIR) {
|
|
97 pd->dir = 1;
|
|
98 return 0;
|
|
99 }
|
|
100 pd->dir = 0;
|
|
101 pd->fp = fopen(p->unixName,"r"); // os9toUnixAttr(attr));
|
|
102 if (fp) return 0;
|
|
103 return -1;
|
|
104 }
|
|
105
|
|
106
|
|
107 /*
|
|
108 * I$MakDir Entry Point
|
|
109 *
|
|
110 * Entry: X = address of the pathlist
|
|
111 *
|
|
112 * Exit: X = last byte of pathlist address
|
|
113 *
|
|
114 * Error: CC Carry set
|
|
115 * B = errcode
|
|
116 */
|
|
117
|
|
118 int vrbf_mkdir(char **path,PathDesc *pd) {
|
|
119 char *p = checkFileName(path,pd);
|
|
120 if (p==0) return -1;
|
|
121 return mkdir(p,0);
|
|
122 }
|
|
123
|
|
124 /*
|
|
125 * I$ChgDir Entry Point
|
|
126 *
|
|
127 * Entry:
|
|
128 *
|
|
129 * Exit:
|
|
130 *
|
|
131 * Error: CC Carry set
|
|
132 * B = errcode
|
|
133 */
|
|
134
|
|
135 char * vrbf_chdir(char *path) {
|
|
136 cahr *p = checkFileName(path);
|
|
137 if (p==0) return -1;
|
|
138 struct stat buf;
|
|
139 if (stat(p,&buf)!=0) return -1;
|
|
140 if ((buf.st_mode & S_IFMT) == S_IFDIR) {
|
|
141 chdir(p);
|
|
142 return p;
|
|
143 }
|
|
144 return -1;
|
|
145 }
|
|
146
|
|
147
|
|
148 /*
|
|
149 * I$Delete Entry Point
|
|
150 *
|
|
151 * Entry:
|
|
152 *
|
|
153 * Exit:
|
|
154 *
|
|
155 * Error: CC Carry set
|
|
156 * B = errcode
|
|
157 */
|
|
158
|
|
159 int vrbf_delete(char *path) {
|
|
160 cahr *p = checkFileName(path);
|
|
161 if (p==0) return -1;
|
|
162 return rmdir(p);
|
|
163 }
|
|
164
|
|
165
|
|
166 /*
|
|
167 * I$Seek Entry Point
|
|
168 *
|
|
169 * Entry:
|
|
170 *
|
|
171 * Exit:
|
|
172 *
|
|
173 * Error: CC Carry set
|
|
174 * B = errcode
|
|
175 */
|
|
176
|
|
177 int vrbf_seek(PathDesc *p, int seek) {
|
|
178 return fseek(p->fp,(off_t)seek,SEEK_SET);
|
|
179 }
|
|
180
|
|
181
|
|
182 *
|
|
183 * I$ReadLn Entry Point
|
|
184 *
|
|
185 * Entry:
|
|
186 *
|
|
187 * Exit:
|
|
188 *
|
|
189 * Error: CC Carry set
|
|
190 * B = errcode
|
|
191 *
|
|
192 *
|
|
193 int vrbf_readln(PathDesc *p, byte *buf, int len) {
|
|
194 if (p->dir) return -1;
|
|
195 if (fgets(buf,len,p->fp)) {
|
|
196 int i;
|
|
197 for(i=0;i<len && buf[i];i++);
|
|
198 if (i>0 && buf[i-1]=='\n') {
|
|
199 buf[i-1] = '\r';
|
|
200 return i;
|
|
201 }
|
|
202 }
|
|
203 return -1;
|
|
204 }
|
|
205
|
|
206 /*
|
|
207 * I$Read Entry Point
|
|
208 *
|
|
209 * Entry:
|
|
210 *
|
|
211 * Exit:
|
|
212 *
|
|
213 * Error: CC Carry set
|
|
214 * B = errcode
|
|
215 */
|
|
216
|
|
217 int vrbf_read(PathDesc *p, byte *buf, int len) {
|
|
218 if (p->dir) return dirread(p,buf,len);
|
|
219 return fread(buf,len,1,p->fp);
|
|
220 }
|
|
221
|
|
222 /*
|
|
223 * I$WritLn Entry Point
|
|
224 *
|
|
225 * Entry:
|
|
226 *
|
|
227 * Exit:
|
|
228 *
|
|
229 * Error: CC Carry set
|
|
230 * B = errcode
|
|
231 */
|
|
232
|
|
233 int vrbf_writeln(PathDesc *p, byte *buf, int len) {
|
|
234 if (p->dir) return -1;
|
|
235 int = 0;
|
|
236 while(len>0 && *buf !='\r) {
|
|
237 fputc(buf[i++],p->fp);
|
|
238 len--;
|
|
239 }
|
|
240 if (buf[i]=='\r') {
|
|
241 fputc('\n',p->fp);
|
|
242 i++;
|
|
243 }
|
|
244 return i;
|
|
245 }
|
|
246
|
|
247 /*
|
|
248 * I$Write Entry Point
|
|
249 *
|
|
250 * Entry:
|
|
251 *
|
|
252 * Exit:
|
|
253 *
|
|
254 * Error: CC Carry set
|
|
255 * B = errcode
|
|
256 */
|
|
257
|
|
258 int vrbf_write(PathDesc *p, byte *buf, int len) {
|
|
259 if (p->dir) return -1;
|
|
260 return fwrite(buf,len,1,p->fp);
|
|
261 }
|
|
262
|
|
263 /* I$Close Entry Point
|
|
264 *
|
|
265 * Entry: A = path number
|
|
266 *
|
|
267 * Exit:
|
|
268 *
|
|
269 * Error: CC Carry set
|
|
270 * B = errcode
|
|
271 *
|
|
272 */
|
|
273
|
|
274 int vrbf_close(PathDesc *p, byte *buf) {
|
|
275 return fclose(p->fp);
|
|
276 }
|
|
277
|
|
278 /*
|
|
279 * I$GetStat Entry Point
|
|
280 *
|
|
281 * Entry:
|
|
282 *
|
|
283 * Exit:
|
|
284 *
|
|
285 * Error: CC Carry set
|
|
286 * B = errcode
|
|
287 */
|
|
288
|
|
289 int vrbf_getstat(int code,OPathDesc *p, O9Stat *s) {
|
|
290 struct stat st;
|
|
291
|
|
292 switch (code) {
|
|
293 case 01: // SS.Ready
|
|
294 fstat(fileno(p->fp),&st);
|
|
295 if (pos = ftell(fp)) {
|
|
296 return st.size - pos;
|
|
297 }
|
|
298 break;
|
|
299 case 02: // SS.SIZ
|
|
300 fstat(fileno(p->fp),&st);
|
|
301 return st.size ;
|
|
302 break;
|
|
303 case 05: // SS.Pos
|
|
304 return ftell(s->fp);
|
|
305 break;
|
|
306 case 15: // SS.FD
|
|
307 break;
|
|
308 case 0x20: // Pos.FDInf
|
|
309 break;
|
|
310 default: return -1;
|
|
311 }
|
|
312 return -1;
|
|
313 }
|
|
314
|
|
315 /*
|
|
316 * I$SetStat Entry Point
|
|
317 *
|
|
318 * Entry:
|
|
319 *
|
|
320 * Exit:
|
|
321 *
|
|
322 * Error: CC Carry set
|
|
323 * B = errcode
|
|
324 */
|
|
325
|
|
326 int vrbf_getstat(int code,OPathDesc *p, O9Stat *s) {
|
|
327 switch (code) {
|
|
328 case 0: // SS.Opt
|
|
329 break;
|
|
330 case 02: // SS.SIZ
|
|
331 break;
|
|
332 case 15: // SS.FD
|
|
333 break;
|
|
334 case 0x11: // SS.Lock
|
|
335 break;
|
|
336 case 0x10: // SS.Ticks
|
|
337 break;
|
|
338 case 0x20: // SS.RsBit
|
|
339 break;
|
|
340 case 0x1c: // SS.Attr
|
|
341 break;
|
|
342 default: return -1;
|
|
343 }
|
|
344 }
|
|
345
|
|
346
|