Demonstration of a very simple unix-like shell. Based on integrating both Klaus Bu\'s SDHCFileSystem and the FATFileSystem library out of Thomas Hamilton\'s SDCard program. Result: you get high capacity + a plethora of filesystem functions.
main.cpp@0:792bddcf799d, 2011-10-11 (annotated)
- Committer:
- shimniok
- Date:
- Tue Oct 11 15:13:42 2011 +0000
- Revision:
- 0:792bddcf799d
Initial
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
shimniok | 0:792bddcf799d | 1 | #include "mbed.h" |
shimniok | 0:792bddcf799d | 2 | #include "stdint.h" |
shimniok | 0:792bddcf799d | 3 | #include "DirHandle.h" |
shimniok | 0:792bddcf799d | 4 | #include "SDHCFileSystem.h" |
shimniok | 0:792bddcf799d | 5 | |
shimniok | 0:792bddcf799d | 6 | SDFileSystem sd(p5, p6, p7, p8, "SDCard"); // mosi, miso, sclk, cs |
shimniok | 0:792bddcf799d | 7 | |
shimniok | 0:792bddcf799d | 8 | DigitalOut led1(LED1); |
shimniok | 0:792bddcf799d | 9 | DigitalOut led2(LED2); |
shimniok | 0:792bddcf799d | 10 | DigitalOut led3(LED3); |
shimniok | 0:792bddcf799d | 11 | DigitalOut led4(LED4); |
shimniok | 0:792bddcf799d | 12 | Serial pc(USBTX, USBRX); |
shimniok | 0:792bddcf799d | 13 | |
shimniok | 0:792bddcf799d | 14 | // cd |
shimniok | 0:792bddcf799d | 15 | // cat |
shimniok | 0:792bddcf799d | 16 | // ls |
shimniok | 0:792bddcf799d | 17 | |
shimniok | 0:792bddcf799d | 18 | char cwd[64]; |
shimniok | 0:792bddcf799d | 19 | char arg[64]; |
shimniok | 0:792bddcf799d | 20 | char buf[128]; |
shimniok | 0:792bddcf799d | 21 | bool debug=false; |
shimniok | 0:792bddcf799d | 22 | |
shimniok | 0:792bddcf799d | 23 | void shell(void); |
shimniok | 0:792bddcf799d | 24 | char *split(char *s, char *t, int max, char delim); |
shimniok | 0:792bddcf799d | 25 | void termInput(char *cmd); |
shimniok | 0:792bddcf799d | 26 | void resolveDirectory(char *newpath, char *path); |
shimniok | 0:792bddcf799d | 27 | void splitName(char *path, char *dirname, char *basename); |
shimniok | 0:792bddcf799d | 28 | void ls(char *path); |
shimniok | 0:792bddcf799d | 29 | void cd(char *path); |
shimniok | 0:792bddcf799d | 30 | void pwd(void); |
shimniok | 0:792bddcf799d | 31 | void touch(char *path); |
shimniok | 0:792bddcf799d | 32 | void head(char *path); |
shimniok | 0:792bddcf799d | 33 | void cat(char *path); |
shimniok | 0:792bddcf799d | 34 | |
shimniok | 0:792bddcf799d | 35 | int main() |
shimniok | 0:792bddcf799d | 36 | { |
shimniok | 0:792bddcf799d | 37 | pc.baud(115200); |
shimniok | 0:792bddcf799d | 38 | |
shimniok | 0:792bddcf799d | 39 | shell(); |
shimniok | 0:792bddcf799d | 40 | |
shimniok | 0:792bddcf799d | 41 | while (1) { |
shimniok | 0:792bddcf799d | 42 | led1 = !led1; |
shimniok | 0:792bddcf799d | 43 | wait_ms(250); |
shimniok | 0:792bddcf799d | 44 | led2 = !led2; |
shimniok | 0:792bddcf799d | 45 | wait_ms(250); |
shimniok | 0:792bddcf799d | 46 | led3 = !led3; |
shimniok | 0:792bddcf799d | 47 | wait_ms(250); |
shimniok | 0:792bddcf799d | 48 | led4 = !led4; |
shimniok | 0:792bddcf799d | 49 | wait_ms(250); |
shimniok | 0:792bddcf799d | 50 | } |
shimniok | 0:792bddcf799d | 51 | } |
shimniok | 0:792bddcf799d | 52 | |
shimniok | 0:792bddcf799d | 53 | void shell() { |
shimniok | 0:792bddcf799d | 54 | FILE *fp; |
shimniok | 0:792bddcf799d | 55 | char newpath[64], *arg, cmd[64], cmdline[64]; |
shimniok | 0:792bddcf799d | 56 | bool done=false; |
shimniok | 0:792bddcf799d | 57 | |
shimniok | 0:792bddcf799d | 58 | //Logger.SelectCRCMode(1); |
shimniok | 0:792bddcf799d | 59 | |
shimniok | 0:792bddcf799d | 60 | //pc.printf("Formatting...\n"); |
shimniok | 0:792bddcf799d | 61 | //int i = Logger.format(32); |
shimniok | 0:792bddcf799d | 62 | //pc.printf("format result: %d\n", i); |
shimniok | 0:792bddcf799d | 63 | |
shimniok | 0:792bddcf799d | 64 | if ((fp = fopen("/SDCard/message.txt", "w")) != NULL) { |
shimniok | 0:792bddcf799d | 65 | for (int i=0; i < 20; i++) |
shimniok | 0:792bddcf799d | 66 | fprintf(fp, "Hello, World!\n"); |
shimniok | 0:792bddcf799d | 67 | fclose(fp); |
shimniok | 0:792bddcf799d | 68 | //pc.printf("created!\n"); |
shimniok | 0:792bddcf799d | 69 | } else { |
shimniok | 0:792bddcf799d | 70 | pc.printf("Error creating file\n"); |
shimniok | 0:792bddcf799d | 71 | } |
shimniok | 0:792bddcf799d | 72 | pc.printf("\n"); |
shimniok | 0:792bddcf799d | 73 | |
shimniok | 0:792bddcf799d | 74 | strcpy(cwd, "/SDCard"); |
shimniok | 0:792bddcf799d | 75 | |
shimniok | 0:792bddcf799d | 76 | while (!done) { |
shimniok | 0:792bddcf799d | 77 | termInput(cmdline); |
shimniok | 0:792bddcf799d | 78 | arg = split(cmd, cmdline, 64, ' '); |
shimniok | 0:792bddcf799d | 79 | resolveDirectory(newpath, arg); |
shimniok | 0:792bddcf799d | 80 | |
shimniok | 0:792bddcf799d | 81 | if (debug) pc.printf("cmdline:<%s> cmd:<%s> arg:<%s> newpath:<%s>\n", cmdline, cmd, arg, newpath); |
shimniok | 0:792bddcf799d | 82 | |
shimniok | 0:792bddcf799d | 83 | if (!strcmp(cmd, "ls")) { |
shimniok | 0:792bddcf799d | 84 | ls(newpath); |
shimniok | 0:792bddcf799d | 85 | } else if (!strcmp(cmd, "cd")) { |
shimniok | 0:792bddcf799d | 86 | cd(newpath); |
shimniok | 0:792bddcf799d | 87 | } else if (!strcmp(cmd, "pwd")) { |
shimniok | 0:792bddcf799d | 88 | pwd(); |
shimniok | 0:792bddcf799d | 89 | } else if (!strcmp(cmd, "head")) { |
shimniok | 0:792bddcf799d | 90 | head(newpath); |
shimniok | 0:792bddcf799d | 91 | } else if (!strcmp(cmd, "cat")) { |
shimniok | 0:792bddcf799d | 92 | cat(newpath); |
shimniok | 0:792bddcf799d | 93 | } else if (!strcmp(cmd, "mkdir")) { |
shimniok | 0:792bddcf799d | 94 | mkdir(newpath, 1023); |
shimniok | 0:792bddcf799d | 95 | } else if (!strcmp(cmd, "debug")) { |
shimniok | 0:792bddcf799d | 96 | debug = !debug; |
shimniok | 0:792bddcf799d | 97 | } else if (!strcmp(cmd, "touch")) { |
shimniok | 0:792bddcf799d | 98 | touch(newpath); |
shimniok | 0:792bddcf799d | 99 | } else if (!strcmp(cmd, "rm")) { |
shimniok | 0:792bddcf799d | 100 | remove(newpath); |
shimniok | 0:792bddcf799d | 101 | } else if (!strcmp(cmd, "exit")) { |
shimniok | 0:792bddcf799d | 102 | done = true; |
shimniok | 0:792bddcf799d | 103 | } else { |
shimniok | 0:792bddcf799d | 104 | pc.printf("%s: command not found\n", cmd); |
shimniok | 0:792bddcf799d | 105 | } |
shimniok | 0:792bddcf799d | 106 | } |
shimniok | 0:792bddcf799d | 107 | |
shimniok | 0:792bddcf799d | 108 | /* |
shimniok | 0:792bddcf799d | 109 | pc.printf("Printing splitName()\n"); |
shimniok | 0:792bddcf799d | 110 | splitName("/SDCard/testdir", dirname, basename); |
shimniok | 0:792bddcf799d | 111 | pc.printf("%s %s\n", dirname, basename); |
shimniok | 0:792bddcf799d | 112 | |
shimniok | 0:792bddcf799d | 113 | pc.printf("Printing resolveDirectory()\n"); |
shimniok | 0:792bddcf799d | 114 | resolveDirectory(newpath, "test"); |
shimniok | 0:792bddcf799d | 115 | pc.printf("%s\n", newpath); |
shimniok | 0:792bddcf799d | 116 | */ |
shimniok | 0:792bddcf799d | 117 | |
shimniok | 0:792bddcf799d | 118 | // remove("/SDCard/testdir/TEST.txt"); |
shimniok | 0:792bddcf799d | 119 | |
shimniok | 0:792bddcf799d | 120 | /*int test = rename("/SDCard/message.txt", "/SDCard/message2.txt"); |
shimniok | 0:792bddcf799d | 121 | fp = fopen("/SDCard/message.txt", "a"); |
shimniok | 0:792bddcf799d | 122 | fprintf(fp, " Result = %d", test); |
shimniok | 0:792bddcf799d | 123 | fclose(fp);*/ |
shimniok | 0:792bddcf799d | 124 | |
shimniok | 0:792bddcf799d | 125 | pc.printf ("exiting shell\n"); |
shimniok | 0:792bddcf799d | 126 | |
shimniok | 0:792bddcf799d | 127 | return; |
shimniok | 0:792bddcf799d | 128 | } |
shimniok | 0:792bddcf799d | 129 | |
shimniok | 0:792bddcf799d | 130 | // copy t to s until delimiter is reached |
shimniok | 0:792bddcf799d | 131 | // return location of delimiter+1 in t |
shimniok | 0:792bddcf799d | 132 | char *split(char *s, char *t, int max, char delim) |
shimniok | 0:792bddcf799d | 133 | { |
shimniok | 0:792bddcf799d | 134 | int i = 0; |
shimniok | 0:792bddcf799d | 135 | char *v; |
shimniok | 0:792bddcf799d | 136 | |
shimniok | 0:792bddcf799d | 137 | if (s == 0 || t == 0) |
shimniok | 0:792bddcf799d | 138 | return 0; |
shimniok | 0:792bddcf799d | 139 | |
shimniok | 0:792bddcf799d | 140 | while (*t != 0 && *t != delim && i < max) { |
shimniok | 0:792bddcf799d | 141 | *s++ = *t++; |
shimniok | 0:792bddcf799d | 142 | i++; |
shimniok | 0:792bddcf799d | 143 | } |
shimniok | 0:792bddcf799d | 144 | *s = 0; |
shimniok | 0:792bddcf799d | 145 | |
shimniok | 0:792bddcf799d | 146 | if (*t == '\0') |
shimniok | 0:792bddcf799d | 147 | v = s; |
shimniok | 0:792bddcf799d | 148 | else |
shimniok | 0:792bddcf799d | 149 | v = t+1; |
shimniok | 0:792bddcf799d | 150 | |
shimniok | 0:792bddcf799d | 151 | return v; |
shimniok | 0:792bddcf799d | 152 | } |
shimniok | 0:792bddcf799d | 153 | |
shimniok | 0:792bddcf799d | 154 | |
shimniok | 0:792bddcf799d | 155 | /** termInput |
shimniok | 0:792bddcf799d | 156 | * |
shimniok | 0:792bddcf799d | 157 | */ |
shimniok | 0:792bddcf799d | 158 | void termInput(char *cmd) { |
shimniok | 0:792bddcf799d | 159 | int i=0; |
shimniok | 0:792bddcf799d | 160 | char c; |
shimniok | 0:792bddcf799d | 161 | bool done = false; |
shimniok | 0:792bddcf799d | 162 | |
shimniok | 0:792bddcf799d | 163 | memset(cmd, 0, 64); |
shimniok | 0:792bddcf799d | 164 | |
shimniok | 0:792bddcf799d | 165 | pc.printf("# ", cwd); |
shimniok | 0:792bddcf799d | 166 | do { |
shimniok | 0:792bddcf799d | 167 | cmd[i] = 0; |
shimniok | 0:792bddcf799d | 168 | c = pc.getc(); |
shimniok | 0:792bddcf799d | 169 | if (c == '\r') { // if return is hit, we're done, don't add \r to cmd |
shimniok | 0:792bddcf799d | 170 | done = true; |
shimniok | 0:792bddcf799d | 171 | } else if (i < 64-1) { |
shimniok | 0:792bddcf799d | 172 | if (c == 0x7f) { // backspace |
shimniok | 0:792bddcf799d | 173 | if (i > 0) { // if we're at the beginning, do nothing |
shimniok | 0:792bddcf799d | 174 | i--; |
shimniok | 0:792bddcf799d | 175 | pc.printf("\b \b"); |
shimniok | 0:792bddcf799d | 176 | } |
shimniok | 0:792bddcf799d | 177 | } else { |
shimniok | 0:792bddcf799d | 178 | pc.printf("%c", c); |
shimniok | 0:792bddcf799d | 179 | cmd[i++] = c; |
shimniok | 0:792bddcf799d | 180 | } |
shimniok | 0:792bddcf799d | 181 | } |
shimniok | 0:792bddcf799d | 182 | } while (!done); |
shimniok | 0:792bddcf799d | 183 | pc.printf("\n"); |
shimniok | 0:792bddcf799d | 184 | } |
shimniok | 0:792bddcf799d | 185 | |
shimniok | 0:792bddcf799d | 186 | /** resolveDirectory |
shimniok | 0:792bddcf799d | 187 | * resolve the directory path provided, given the cwd |
shimniok | 0:792bddcf799d | 188 | */ |
shimniok | 0:792bddcf799d | 189 | void resolveDirectory(char *newpath, char *path) { |
shimniok | 0:792bddcf799d | 190 | char basename[64], dirname[64]; |
shimniok | 0:792bddcf799d | 191 | |
shimniok | 0:792bddcf799d | 192 | /** absolute path */ |
shimniok | 0:792bddcf799d | 193 | if (path[0] == '/') { |
shimniok | 0:792bddcf799d | 194 | strcpy(newpath, path); |
shimniok | 0:792bddcf799d | 195 | } |
shimniok | 0:792bddcf799d | 196 | /** relative path */ |
shimniok | 0:792bddcf799d | 197 | else { |
shimniok | 0:792bddcf799d | 198 | strcpy(newpath, cwd); |
shimniok | 0:792bddcf799d | 199 | if (path[0] != 0) { |
shimniok | 0:792bddcf799d | 200 | if (newpath[strlen(newpath)-1] != '/') |
shimniok | 0:792bddcf799d | 201 | strcat(newpath, "/"); |
shimniok | 0:792bddcf799d | 202 | strcat(newpath, path); |
shimniok | 0:792bddcf799d | 203 | } |
shimniok | 0:792bddcf799d | 204 | /** Resolve .. references */ |
shimniok | 0:792bddcf799d | 205 | splitName(newpath, dirname, basename); |
shimniok | 0:792bddcf799d | 206 | if (!strcmp(basename, "..")) { |
shimniok | 0:792bddcf799d | 207 | splitName(dirname, newpath, basename); |
shimniok | 0:792bddcf799d | 208 | } |
shimniok | 0:792bddcf799d | 209 | } |
shimniok | 0:792bddcf799d | 210 | } |
shimniok | 0:792bddcf799d | 211 | |
shimniok | 0:792bddcf799d | 212 | /** splitName |
shimniok | 0:792bddcf799d | 213 | * split the path into a dirname and a basename |
shimniok | 0:792bddcf799d | 214 | */ |
shimniok | 0:792bddcf799d | 215 | void splitName(char *path, char *dirname, char *basename) { |
shimniok | 0:792bddcf799d | 216 | int sep; |
shimniok | 0:792bddcf799d | 217 | |
shimniok | 0:792bddcf799d | 218 | sep = 0; |
shimniok | 0:792bddcf799d | 219 | if (debug) pc.printf("%d\n", strlen(path)); |
shimniok | 0:792bddcf799d | 220 | for (int i=strlen(path)-1; i >= 0; i--) { |
shimniok | 0:792bddcf799d | 221 | if (debug) pc.printf("- %c\n", path[i]); |
shimniok | 0:792bddcf799d | 222 | sep = i; |
shimniok | 0:792bddcf799d | 223 | if (path[i] == '/') break; |
shimniok | 0:792bddcf799d | 224 | } |
shimniok | 0:792bddcf799d | 225 | for (int j=0; j < sep; j++) { |
shimniok | 0:792bddcf799d | 226 | if (debug) pc.printf("> %c\n", path[j]); |
shimniok | 0:792bddcf799d | 227 | dirname[j] = path[j]; |
shimniok | 0:792bddcf799d | 228 | dirname[j+1] = 0; |
shimniok | 0:792bddcf799d | 229 | } |
shimniok | 0:792bddcf799d | 230 | for (int k=sep+1; k < strlen(path); k++) { |
shimniok | 0:792bddcf799d | 231 | if (debug) pc.printf("* %c\n", path[k]); |
shimniok | 0:792bddcf799d | 232 | basename[k-(sep+1)] = path[k]; |
shimniok | 0:792bddcf799d | 233 | basename[k-sep] = 0; |
shimniok | 0:792bddcf799d | 234 | } |
shimniok | 0:792bddcf799d | 235 | if (debug) pc.printf("d:<%s> b:<%s>\n", dirname, basename); |
shimniok | 0:792bddcf799d | 236 | } |
shimniok | 0:792bddcf799d | 237 | |
shimniok | 0:792bddcf799d | 238 | /** ls |
shimniok | 0:792bddcf799d | 239 | * lists files in the current working directory |
shimniok | 0:792bddcf799d | 240 | */ |
shimniok | 0:792bddcf799d | 241 | void ls(char *path) { |
shimniok | 0:792bddcf799d | 242 | if (debug) pc.printf("%s\n", cwd); |
shimniok | 0:792bddcf799d | 243 | DIR *d; |
shimniok | 0:792bddcf799d | 244 | struct dirent *p; |
shimniok | 0:792bddcf799d | 245 | |
shimniok | 0:792bddcf799d | 246 | if ((d = opendir(path)) != NULL) { |
shimniok | 0:792bddcf799d | 247 | while ((p = readdir(d)) != NULL) { |
shimniok | 0:792bddcf799d | 248 | pc.printf(" %s\n", p->d_name); |
shimniok | 0:792bddcf799d | 249 | } |
shimniok | 0:792bddcf799d | 250 | closedir(d); |
shimniok | 0:792bddcf799d | 251 | } else { |
shimniok | 0:792bddcf799d | 252 | pc.printf("%s: No such directory\n", path); |
shimniok | 0:792bddcf799d | 253 | } |
shimniok | 0:792bddcf799d | 254 | } |
shimniok | 0:792bddcf799d | 255 | |
shimniok | 0:792bddcf799d | 256 | /** cd |
shimniok | 0:792bddcf799d | 257 | * changes current working directory |
shimniok | 0:792bddcf799d | 258 | */ |
shimniok | 0:792bddcf799d | 259 | void cd(char *path) { |
shimniok | 0:792bddcf799d | 260 | strcpy(cwd, path); |
shimniok | 0:792bddcf799d | 261 | } |
shimniok | 0:792bddcf799d | 262 | |
shimniok | 0:792bddcf799d | 263 | /** pwd |
shimniok | 0:792bddcf799d | 264 | * print current working directory |
shimniok | 0:792bddcf799d | 265 | */ |
shimniok | 0:792bddcf799d | 266 | void pwd() { |
shimniok | 0:792bddcf799d | 267 | pc.printf("%s\n", cwd); |
shimniok | 0:792bddcf799d | 268 | } |
shimniok | 0:792bddcf799d | 269 | |
shimniok | 0:792bddcf799d | 270 | /** touch |
shimniok | 0:792bddcf799d | 271 | * create an empty file |
shimniok | 0:792bddcf799d | 272 | */ |
shimniok | 0:792bddcf799d | 273 | void touch(char *path) { |
shimniok | 0:792bddcf799d | 274 | FILE *fp; |
shimniok | 0:792bddcf799d | 275 | if ((fp = fopen(path, "w")) != NULL) { |
shimniok | 0:792bddcf799d | 276 | fclose(fp); |
shimniok | 0:792bddcf799d | 277 | } else { |
shimniok | 0:792bddcf799d | 278 | pc.printf("%s: No such file\n", path); |
shimniok | 0:792bddcf799d | 279 | } |
shimniok | 0:792bddcf799d | 280 | } |
shimniok | 0:792bddcf799d | 281 | |
shimniok | 0:792bddcf799d | 282 | /** head |
shimniok | 0:792bddcf799d | 283 | * print the first 10 lines of a file |
shimniok | 0:792bddcf799d | 284 | */ |
shimniok | 0:792bddcf799d | 285 | void head(char *path) { |
shimniok | 0:792bddcf799d | 286 | FILE *fp; |
shimniok | 0:792bddcf799d | 287 | char line = 0; |
shimniok | 0:792bddcf799d | 288 | |
shimniok | 0:792bddcf799d | 289 | if ((fp = fopen(path, "r")) != NULL) { |
shimniok | 0:792bddcf799d | 290 | while (!feof(fp) && line++ < 10) { |
shimniok | 0:792bddcf799d | 291 | fgets(buf, 128, fp); |
shimniok | 0:792bddcf799d | 292 | pc.printf("%s", buf); |
shimniok | 0:792bddcf799d | 293 | } |
shimniok | 0:792bddcf799d | 294 | fclose(fp); |
shimniok | 0:792bddcf799d | 295 | } else { |
shimniok | 0:792bddcf799d | 296 | pc.printf("%s: No such file\n", path); |
shimniok | 0:792bddcf799d | 297 | } |
shimniok | 0:792bddcf799d | 298 | } |
shimniok | 0:792bddcf799d | 299 | |
shimniok | 0:792bddcf799d | 300 | /** cat |
shimniok | 0:792bddcf799d | 301 | * display the content of a file |
shimniok | 0:792bddcf799d | 302 | */ |
shimniok | 0:792bddcf799d | 303 | void cat(char *path) { |
shimniok | 0:792bddcf799d | 304 | FILE *fp; |
shimniok | 0:792bddcf799d | 305 | |
shimniok | 0:792bddcf799d | 306 | if ((fp = fopen(path, "r")) != NULL) { |
shimniok | 0:792bddcf799d | 307 | while (!feof(fp)) { |
shimniok | 0:792bddcf799d | 308 | fgets(buf, 128, fp); |
shimniok | 0:792bddcf799d | 309 | pc.printf("%s", buf); |
shimniok | 0:792bddcf799d | 310 | } |
shimniok | 0:792bddcf799d | 311 | fclose(fp); |
shimniok | 0:792bddcf799d | 312 | } else { |
shimniok | 0:792bddcf799d | 313 | pc.printf("%s: No such file\n", path); |
shimniok | 0:792bddcf799d | 314 | } |
shimniok | 0:792bddcf799d | 315 | } |