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