Michael Shimniok / SimpleShell

Simple embedded shell with runtime pluggable commands.

Dependents:   DataBus2018

Implements a simple unix-like shell for embedded systems with a pluggable command architecture.

SimpleShell.cpp@30:35522ea06236, 2018-12-27 (annotated)

Committer:
shimniok
Date:
Thu Dec 27 15:50:34 2018 +0000
Revision:
30:35522ea06236
Parent:
29:8d4132274445
Child:
31:27e8130a0d8f
Fixed bug: too many command args causes crash

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shimniok 21:5d7ac1f0b842 1 #include "SimpleShell.h"
shimniok 21:5d7ac1f0b842 2 #include <ctype.h>
shimniok 21:5d7ac1f0b842 3 #include <string>
shimniok 28:753db82debb1 4 #include <list>
shimniok 21:5d7ac1f0b842 5
shimniok 21:5d7ac1f0b842 6 #define ESC 0x1b
shimniok 21:5d7ac1f0b842 7 #define UP 0x41
shimniok 21:5d7ac1f0b842 8 #define DOWN 0x42
shimniok 21:5d7ac1f0b842 9 #define RIGHT 0x43
shimniok 21:5d7ac1f0b842 10 #define LEFT 0x44
shimniok 21:5d7ac1f0b842 11 #define HOME 0x31
shimniok 21:5d7ac1f0b842 12 #define INS 0x32
shimniok 21:5d7ac1f0b842 13 #define DEL 0x33
shimniok 21:5d7ac1f0b842 14 #define PGUP 0x35
shimniok 21:5d7ac1f0b842 15 #define PGDN 0x36
shimniok 21:5d7ac1f0b842 16 #define TAIL 0x7e
shimniok 21:5d7ac1f0b842 17
shimniok 21:5d7ac1f0b842 18
shimniok 29:8d4132274445 19 SimpleShell::SimpleShell(char *home)
shimniok 28:753db82debb1 20 {
shimniok 28:753db82debb1 21 lookupEnd = 0;
shimniok 28:753db82debb1 22
shimniok 29:8d4132274445 23 // Set home directory
shimniok 29:8d4132274445 24 strncpy(_home, canon(home), MAXBUF);
shimniok 29:8d4132274445 25
shimniok 29:8d4132274445 26 // Set current working directory
shimniok 29:8d4132274445 27 strncpy(_cwd, _home, MAXBUF);
shimniok 29:8d4132274445 28
shimniok 28:753db82debb1 29 // Built-in shell commands
shimniok 28:753db82debb1 30 command(callback(this, &SimpleShell::help), "help");
shimniok 28:753db82debb1 31 command(callback(this, &SimpleShell::pwd), "pwd");
shimniok 28:753db82debb1 32 command(callback(this, &SimpleShell::cat), "cat");
shimniok 28:753db82debb1 33 command(callback(this, &SimpleShell::cd), "cd");
shimniok 28:753db82debb1 34 command(callback(this, &SimpleShell::rm), "rm");
shimniok 28:753db82debb1 35 command(callback(this, &SimpleShell::touch), "touch");
shimniok 28:753db82debb1 36 command(callback(this, &SimpleShell::ls), "ls");
shimniok 28:753db82debb1 37 command(callback(this, &SimpleShell::send), "send");
shimniok 28:753db82debb1 38 }
shimniok 28:753db82debb1 39
shimniok 28:753db82debb1 40
shimniok 28:753db82debb1 41 /// Path stack representation
shimniok 28:753db82debb1 42 typedef std::list<char*> path_t;
shimniok 28:753db82debb1 43
shimniok 21:5d7ac1f0b842 44 char *SimpleShell::canon(char *path) {
shimniok 28:753db82debb1 45 path_t pstack;
shimniok 28:753db82debb1 46 static char tmp[MAXBUF*2];
shimniok 28:753db82debb1 47 char *e;
shimniok 21:5d7ac1f0b842 48
shimniok 28:753db82debb1 49 // if we're passed empty/null string, just send back cwd so nothing breaks
shimniok 28:753db82debb1 50 if (path == NULL || strlen(path) == 0) {
shimniok 28:753db82debb1 51 strcpy(tmp, _cwd);
shimniok 28:753db82debb1 52 return tmp;
shimniok 28:753db82debb1 53 }
shimniok 28:753db82debb1 54
shimniok 28:753db82debb1 55 // relative path? add current working directory to path stack
shimniok 21:5d7ac1f0b842 56 if (path[0] != '/') {
shimniok 28:753db82debb1 57 strcpy(tmp, _cwd);
shimniok 28:753db82debb1 58 strcat(tmp, "/");
shimniok 28:753db82debb1 59 strcat(tmp, path);
shimniok 28:753db82debb1 60 } else {
shimniok 28:753db82debb1 61 strcpy(tmp, path);
shimniok 21:5d7ac1f0b842 62 }
shimniok 28:753db82debb1 63
shimniok 28:753db82debb1 64 // now canonicalize the path spec
shimniok 28:753db82debb1 65 e = strtok(tmp+1, "/");
shimniok 28:753db82debb1 66 while (e) {
shimniok 28:753db82debb1 67 //printf("e = <%s>\n", e);
shimniok 28:753db82debb1 68 if (strcmp("..", e) == 0) {
shimniok 28:753db82debb1 69 // pop most recent directory
shimniok 28:753db82debb1 70 if (!pstack.empty())
shimniok 28:753db82debb1 71 pstack.pop_back();
shimniok 28:753db82debb1 72 } else if (strcmp(".", e) != 0) {
shimniok 28:753db82debb1 73 // push this dir onto path
shimniok 28:753db82debb1 74 if (strlen(e) > 0)
shimniok 28:753db82debb1 75 pstack.push_back(e);
shimniok 28:753db82debb1 76 }
shimniok 28:753db82debb1 77 e = strtok(NULL, "/");
shimniok 28:753db82debb1 78 }
shimniok 21:5d7ac1f0b842 79
shimniok 28:753db82debb1 80 static std::string result;
shimniok 28:753db82debb1 81 result = "";
shimniok 28:753db82debb1 82
shimniok 28:753db82debb1 83 for (path_t::iterator it = pstack.begin(); it != pstack.end(); it++) {
shimniok 28:753db82debb1 84 result.append("/");
shimniok 28:753db82debb1 85 result.append(*it);
shimniok 28:753db82debb1 86 }
shimniok 28:753db82debb1 87
shimniok 28:753db82debb1 88 // if empty, add a /
shimniok 28:753db82debb1 89 if (result.size() < 2) {
shimniok 28:753db82debb1 90 result.append("/");
shimniok 28:753db82debb1 91 }
shimniok 28:753db82debb1 92
shimniok 28:753db82debb1 93 strcpy(tmp, result.c_str());
shimniok 28:753db82debb1 94
shimniok 28:753db82debb1 95 return tmp;
shimniok 21:5d7ac1f0b842 96 }
shimniok 21:5d7ac1f0b842 97
shimniok 21:5d7ac1f0b842 98
shimniok 23:b1e49cfcaef6 99 char *SimpleShell::basename(char *path) {
shimniok 24:004e33abce37 100 char *result = path + strlen(path);
shimniok 24:004e33abce37 101
shimniok 24:004e33abce37 102 while (result != path) {
shimniok 24:004e33abce37 103 if (*result == '/') {
shimniok 24:004e33abce37 104 result++;
shimniok 24:004e33abce37 105 break;
shimniok 24:004e33abce37 106 }
shimniok 24:004e33abce37 107 result--;
shimniok 24:004e33abce37 108 }
shimniok 24:004e33abce37 109
shimniok 24:004e33abce37 110 return result;
shimniok 23:b1e49cfcaef6 111 }
shimniok 23:b1e49cfcaef6 112
shimniok 23:b1e49cfcaef6 113
shimniok 21:5d7ac1f0b842 114 void SimpleShell::help(int argc, char **argv)
shimniok 21:5d7ac1f0b842 115 {
shimniok 21:5d7ac1f0b842 116 printf("Available commands: ");
shimniok 21:5d7ac1f0b842 117 for (int i=0; i < lookupEnd; i++) {
shimniok 21:5d7ac1f0b842 118 printf("%s ", lookup[i].command);
shimniok 21:5d7ac1f0b842 119 }
shimniok 21:5d7ac1f0b842 120 printf("\n\n");
shimniok 21:5d7ac1f0b842 121 }
shimniok 21:5d7ac1f0b842 122
shimniok 21:5d7ac1f0b842 123
shimniok 21:5d7ac1f0b842 124 void SimpleShell::cd(int argc, char **argv)
shimniok 21:5d7ac1f0b842 125 {
shimniok 29:8d4132274445 126 if (argc == 1) {
shimniok 29:8d4132274445 127 strncpy(_cwd, _home, MAXBUF);
shimniok 29:8d4132274445 128 } else if (argc == 2) {
shimniok 28:753db82debb1 129 strncpy(_cwd, canon(argv[1]), MAXBUF);
shimniok 21:5d7ac1f0b842 130 } else {
shimniok 21:5d7ac1f0b842 131 puts("usage: cd directory");
shimniok 21:5d7ac1f0b842 132 }
shimniok 21:5d7ac1f0b842 133 return;
shimniok 21:5d7ac1f0b842 134 }
shimniok 21:5d7ac1f0b842 135
shimniok 21:5d7ac1f0b842 136
shimniok 21:5d7ac1f0b842 137 void SimpleShell::pwd(int argc, char **argv)
shimniok 21:5d7ac1f0b842 138 {
shimniok 21:5d7ac1f0b842 139 puts(_cwd);
shimniok 21:5d7ac1f0b842 140 return;
shimniok 21:5d7ac1f0b842 141 }
shimniok 21:5d7ac1f0b842 142
shimniok 21:5d7ac1f0b842 143
shimniok 21:5d7ac1f0b842 144 void SimpleShell::ls(int argc, char **argv)
shimniok 21:5d7ac1f0b842 145 {
shimniok 21:5d7ac1f0b842 146 DIR *d;
shimniok 21:5d7ac1f0b842 147 struct dirent *p;
shimniok 21:5d7ac1f0b842 148 char *path;
shimniok 21:5d7ac1f0b842 149
shimniok 21:5d7ac1f0b842 150 if (argc == 1) {
shimniok 21:5d7ac1f0b842 151 path = _cwd;
shimniok 21:5d7ac1f0b842 152 } else if (argc == 2) {
shimniok 28:753db82debb1 153 path = canon(argv[1]);
shimniok 21:5d7ac1f0b842 154 } else {
shimniok 21:5d7ac1f0b842 155 puts("usage: ls [directory]");
shimniok 21:5d7ac1f0b842 156 return;
shimniok 21:5d7ac1f0b842 157 }
shimniok 21:5d7ac1f0b842 158
shimniok 21:5d7ac1f0b842 159 int cols=0;
shimniok 21:5d7ac1f0b842 160 if ((d = opendir(path)) != NULL) {
shimniok 21:5d7ac1f0b842 161 while ((p = readdir(d)) != NULL) {
shimniok 21:5d7ac1f0b842 162 if (p->d_name && p->d_name[0] != 0xff) {
shimniok 21:5d7ac1f0b842 163 if (cols++ > 3) {
shimniok 21:5d7ac1f0b842 164 putc('\n', stdout);
shimniok 21:5d7ac1f0b842 165 cols = 0;
shimniok 21:5d7ac1f0b842 166 }
shimniok 21:5d7ac1f0b842 167 printf("%-15s ", p->d_name);
shimniok 21:5d7ac1f0b842 168 }
shimniok 21:5d7ac1f0b842 169 }
shimniok 21:5d7ac1f0b842 170 putc('\n', stdout);
shimniok 21:5d7ac1f0b842 171 if (cols < 3)
shimniok 21:5d7ac1f0b842 172 putc('\n', stdout);
shimniok 21:5d7ac1f0b842 173 closedir(d);
shimniok 21:5d7ac1f0b842 174 } else {
shimniok 21:5d7ac1f0b842 175 puts(path);
shimniok 21:5d7ac1f0b842 176 puts(": No such directory\n");
shimniok 21:5d7ac1f0b842 177 }
shimniok 21:5d7ac1f0b842 178
shimniok 21:5d7ac1f0b842 179 return;
shimniok 21:5d7ac1f0b842 180 }
shimniok 21:5d7ac1f0b842 181
shimniok 21:5d7ac1f0b842 182
shimniok 21:5d7ac1f0b842 183 void SimpleShell::rm(int argc, char **argv)
shimniok 21:5d7ac1f0b842 184 {
shimniok 21:5d7ac1f0b842 185 if (argc >= 2) {
shimniok 21:5d7ac1f0b842 186 for (int i=1; i < argc; i++) {
shimniok 21:5d7ac1f0b842 187 if (remove(canon(argv[i]))) {
shimniok 21:5d7ac1f0b842 188 printf("%s: cannot remove\n", argv[i]);
shimniok 21:5d7ac1f0b842 189 }
shimniok 21:5d7ac1f0b842 190 }
shimniok 21:5d7ac1f0b842 191 } else {
shimniok 21:5d7ac1f0b842 192 puts("usage: rm [file1 [file2 ...]]");
shimniok 21:5d7ac1f0b842 193 }
shimniok 21:5d7ac1f0b842 194 }
shimniok 21:5d7ac1f0b842 195
shimniok 21:5d7ac1f0b842 196
shimniok 21:5d7ac1f0b842 197 void SimpleShell::touch(int argc, char **argv)
shimniok 21:5d7ac1f0b842 198 {
shimniok 21:5d7ac1f0b842 199 FILE *fp;
shimniok 21:5d7ac1f0b842 200
shimniok 21:5d7ac1f0b842 201 if (argc >= 2) {
shimniok 21:5d7ac1f0b842 202 for (int i=1; i < argc; i++) {
shimniok 21:5d7ac1f0b842 203 if ((fp = fopen(canon(argv[i]), "w")) != NULL) {
shimniok 21:5d7ac1f0b842 204 fclose(fp);
shimniok 21:5d7ac1f0b842 205 } else {
shimniok 21:5d7ac1f0b842 206 printf("%s: cannot touch\n", argv[1]);
shimniok 21:5d7ac1f0b842 207 }
shimniok 21:5d7ac1f0b842 208 }
shimniok 21:5d7ac1f0b842 209 } else {
shimniok 21:5d7ac1f0b842 210 puts("usage: touch [file1 [file2 ...]]");
shimniok 21:5d7ac1f0b842 211 }
shimniok 21:5d7ac1f0b842 212 }
shimniok 21:5d7ac1f0b842 213
shimniok 21:5d7ac1f0b842 214
shimniok 21:5d7ac1f0b842 215 void SimpleShell::cat(int argc, char **argv)
shimniok 21:5d7ac1f0b842 216 {
shimniok 21:5d7ac1f0b842 217 FILE *fp;
shimniok 21:5d7ac1f0b842 218 //int status=0;
shimniok 21:5d7ac1f0b842 219 char *buf = new char[MAXBUF];
shimniok 21:5d7ac1f0b842 220
shimniok 21:5d7ac1f0b842 221 for (int i=1; i < argc; i++) {
shimniok 21:5d7ac1f0b842 222 //resolveDirectory(path, arg);
shimniok 21:5d7ac1f0b842 223 if ((fp = fopen(canon(argv[i]), "r")) != NULL) {
shimniok 21:5d7ac1f0b842 224 while (!feof(fp)) {
shimniok 21:5d7ac1f0b842 225 fgets(buf, MAXBUF-1, fp);
shimniok 21:5d7ac1f0b842 226 fputs(buf, stdout);
shimniok 21:5d7ac1f0b842 227 }
shimniok 21:5d7ac1f0b842 228 fclose(fp);
shimniok 21:5d7ac1f0b842 229 } else {
shimniok 21:5d7ac1f0b842 230 fputs(argv[i], stdout);
shimniok 21:5d7ac1f0b842 231 fputs(": No such file\n", stdout);
shimniok 21:5d7ac1f0b842 232 //status = 1;
shimniok 21:5d7ac1f0b842 233 }
shimniok 21:5d7ac1f0b842 234 }
shimniok 21:5d7ac1f0b842 235 delete[] buf;
shimniok 21:5d7ac1f0b842 236
shimniok 21:5d7ac1f0b842 237 return;
shimniok 21:5d7ac1f0b842 238 }
shimniok 21:5d7ac1f0b842 239
shimniok 21:5d7ac1f0b842 240
shimniok 23:b1e49cfcaef6 241 void SimpleShell::send(int argc, char **argv)
shimniok 23:b1e49cfcaef6 242 {
shimniok 23:b1e49cfcaef6 243 const char SOF=0x01;
shimniok 23:b1e49cfcaef6 244 const char ETX=0x03;
shimniok 23:b1e49cfcaef6 245 const char EOT=0x04;
shimniok 23:b1e49cfcaef6 246 const char ACK=0x07;
shimniok 23:b1e49cfcaef6 247 const char NACK=0x18;
shimniok 24:004e33abce37 248 char buf[1024];
shimniok 23:b1e49cfcaef6 249 FILE *fp;
shimniok 24:004e33abce37 250 char c;
shimniok 23:b1e49cfcaef6 251
shimniok 23:b1e49cfcaef6 252 int i = 1;
shimniok 23:b1e49cfcaef6 253 if (argc >= 2) {
shimniok 23:b1e49cfcaef6 254 if ((fp = fopen(canon(argv[i]), "r")) == 0) {
shimniok 23:b1e49cfcaef6 255 printf("%s: can't open file\n", basename(argv[i]));
shimniok 23:b1e49cfcaef6 256 } else {
shimniok 24:004e33abce37 257 puts("Ready; initiate receive on client.");
shimniok 24:004e33abce37 258 c = getchar();
shimniok 24:004e33abce37 259 if (c == SOF) {
shimniok 24:004e33abce37 260 puts(basename(argv[i]));
shimniok 24:004e33abce37 261 c = getchar();
shimniok 24:004e33abce37 262 if (c == ACK) {
shimniok 24:004e33abce37 263 while (!feof(fp)) {
shimniok 24:004e33abce37 264 fgets(buf, 1024, fp);
shimniok 24:004e33abce37 265 fputs(buf, stdout);
shimniok 24:004e33abce37 266 }
shimniok 24:004e33abce37 267 putchar(EOT);
shimniok 24:004e33abce37 268 } else if (c == NACK) {
shimniok 24:004e33abce37 269 puts("client error.");
shimniok 24:004e33abce37 270 } else {
shimniok 24:004e33abce37 271 puts("ACK/NACK expected");
shimniok 24:004e33abce37 272 }
shimniok 24:004e33abce37 273 } else if (c == NACK) {
shimniok 24:004e33abce37 274 puts("server cancelled.");
shimniok 24:004e33abce37 275 } else {
shimniok 24:004e33abce37 276 puts("SOF/NACK expected.");
shimniok 24:004e33abce37 277 }
shimniok 24:004e33abce37 278 fclose(fp);
shimniok 23:b1e49cfcaef6 279 }
shimniok 23:b1e49cfcaef6 280 } else {
shimniok 23:b1e49cfcaef6 281 puts("usage: send file1 [file2 ...]");
shimniok 23:b1e49cfcaef6 282 }
shimniok 23:b1e49cfcaef6 283 }
shimniok 23:b1e49cfcaef6 284
shimniok 23:b1e49cfcaef6 285
shimniok 21:5d7ac1f0b842 286 void SimpleShell::run()
shimniok 21:5d7ac1f0b842 287 {
shimniok 21:5d7ac1f0b842 288 bool done=false;
shimniok 21:5d7ac1f0b842 289 callback_t cb;
shimniok 21:5d7ac1f0b842 290 //int status; // TODO implement command status return
shimniok 21:5d7ac1f0b842 291 std::string x;
shimniok 21:5d7ac1f0b842 292
shimniok 21:5d7ac1f0b842 293 printf("Type help for assistance.\n");
shimniok 21:5d7ac1f0b842 294 help(0, NULL);
shimniok 21:5d7ac1f0b842 295 while (!done) {
shimniok 21:5d7ac1f0b842 296 printPrompt();
shimniok 21:5d7ac1f0b842 297 readCommand();
shimniok 21:5d7ac1f0b842 298 if (argv[0]) { // skip blank command
shimniok 21:5d7ac1f0b842 299 if (cb = findCommand()) {
shimniok 21:5d7ac1f0b842 300 cb.call(argc, argv);
shimniok 21:5d7ac1f0b842 301 } else {
shimniok 21:5d7ac1f0b842 302 printf("command <%s> not found\n", argv[0]);
shimniok 21:5d7ac1f0b842 303 }
shimniok 21:5d7ac1f0b842 304 }
shimniok 21:5d7ac1f0b842 305 }
shimniok 21:5d7ac1f0b842 306 puts("exiting shell\n");
shimniok 21:5d7ac1f0b842 307
shimniok 21:5d7ac1f0b842 308 return;
shimniok 21:5d7ac1f0b842 309 }
shimniok 21:5d7ac1f0b842 310
shimniok 21:5d7ac1f0b842 311
shimniok 28:753db82debb1 312 void SimpleShell::command(callback_t cb, char *command)
shimniok 21:5d7ac1f0b842 313 {
shimniok 21:5d7ac1f0b842 314 if (lookupEnd < MAXLOOKUP) {
shimniok 21:5d7ac1f0b842 315 lookup[lookupEnd].cb = cb;
shimniok 21:5d7ac1f0b842 316 lookup[lookupEnd].command = command;
shimniok 21:5d7ac1f0b842 317 lookupEnd++;
shimniok 21:5d7ac1f0b842 318 }
shimniok 21:5d7ac1f0b842 319
shimniok 21:5d7ac1f0b842 320 return;
shimniok 21:5d7ac1f0b842 321 }
shimniok 21:5d7ac1f0b842 322
shimniok 21:5d7ac1f0b842 323
shimniok 21:5d7ac1f0b842 324 SimpleShell::callback_t SimpleShell::findCommand()
shimniok 21:5d7ac1f0b842 325 {
shimniok 21:5d7ac1f0b842 326 SimpleShell::callback_t cb=NULL;
shimniok 21:5d7ac1f0b842 327
shimniok 21:5d7ac1f0b842 328 for (int i=0; i < lookupEnd; i++) {
shimniok 21:5d7ac1f0b842 329 if (strncmp(argv[0], lookup[i].command, MAXBUF) == 0) {
shimniok 21:5d7ac1f0b842 330 cb = lookup[i].cb;
shimniok 21:5d7ac1f0b842 331 break;
shimniok 21:5d7ac1f0b842 332 }
shimniok 21:5d7ac1f0b842 333 }
shimniok 21:5d7ac1f0b842 334
shimniok 21:5d7ac1f0b842 335 return cb;
shimniok 21:5d7ac1f0b842 336 }
shimniok 21:5d7ac1f0b842 337
shimniok 21:5d7ac1f0b842 338
shimniok 21:5d7ac1f0b842 339 void SimpleShell::printPrompt()
shimniok 21:5d7ac1f0b842 340 {
shimniok 21:5d7ac1f0b842 341 fputc('(', stdout);
shimniok 21:5d7ac1f0b842 342 fputs(_cwd, stdout);
shimniok 21:5d7ac1f0b842 343 fputs(")# ", stdout);
shimniok 21:5d7ac1f0b842 344
shimniok 21:5d7ac1f0b842 345 return;
shimniok 21:5d7ac1f0b842 346 }
shimniok 21:5d7ac1f0b842 347
shimniok 21:5d7ac1f0b842 348
shimniok 21:5d7ac1f0b842 349 void SimpleShell::readCommand()
shimniok 21:5d7ac1f0b842 350 {
shimniok 21:5d7ac1f0b842 351 int i=0;
shimniok 21:5d7ac1f0b842 352 char c;
shimniok 21:5d7ac1f0b842 353 bool done = false;
shimniok 21:5d7ac1f0b842 354 static char cmd[MAXBUF];
shimniok 21:5d7ac1f0b842 355
shimniok 21:5d7ac1f0b842 356 memset(cmd, 0, MAXBUF);
shimniok 21:5d7ac1f0b842 357 do {
shimniok 21:5d7ac1f0b842 358 cmd[i] = 0;
shimniok 21:5d7ac1f0b842 359 c = fgetc(stdin);
shimniok 21:5d7ac1f0b842 360 if (c == '\r') { // if return is hit, we're done, don't add \r to cmd
shimniok 21:5d7ac1f0b842 361 done = true;
shimniok 21:5d7ac1f0b842 362 } else if (c == ESC) { // keyboard escape codes (arrow keys, etc)
shimniok 21:5d7ac1f0b842 363 int c2 = getchar();
shimniok 21:5d7ac1f0b842 364 int c3 = getchar();
shimniok 21:5d7ac1f0b842 365
shimniok 21:5d7ac1f0b842 366 if (c2 == 0x4f && c3 == 0x46) {
shimniok 21:5d7ac1f0b842 367 printf("<END>");
shimniok 21:5d7ac1f0b842 368 } else if (c2 == 0x5b) {
shimniok 21:5d7ac1f0b842 369
shimniok 21:5d7ac1f0b842 370 if (c3 == UP) {
shimniok 21:5d7ac1f0b842 371 printf("<UP>");
shimniok 21:5d7ac1f0b842 372 } else if (c3 == DOWN) {
shimniok 21:5d7ac1f0b842 373 printf("<DOWN>");
shimniok 21:5d7ac1f0b842 374 } else if (c3 == RIGHT) {
shimniok 21:5d7ac1f0b842 375 printf("<RIGHT>");
shimniok 21:5d7ac1f0b842 376 } else if (c3 == LEFT) {
shimniok 21:5d7ac1f0b842 377 printf("<LEFT>");
shimniok 21:5d7ac1f0b842 378 } else if (c3 == HOME || c3 == INS || c3 == DEL ||
shimniok 21:5d7ac1f0b842 379 c3 == PGUP || c3 == PGDN) {
shimniok 21:5d7ac1f0b842 380 char c4 = getchar();
shimniok 21:5d7ac1f0b842 381 if (c4 == TAIL) {
shimniok 21:5d7ac1f0b842 382 if (c4 == HOME) {
shimniok 21:5d7ac1f0b842 383 printf("<HOME>");
shimniok 21:5d7ac1f0b842 384 } else if (c4 == INS) {
shimniok 21:5d7ac1f0b842 385 printf("<INS>");
shimniok 21:5d7ac1f0b842 386 } else if (c4 == DEL) {
shimniok 21:5d7ac1f0b842 387 printf("<DEL>");
shimniok 21:5d7ac1f0b842 388 } else if (c4 == PGUP) {
shimniok 21:5d7ac1f0b842 389 printf("<PGUP>");
shimniok 21:5d7ac1f0b842 390 } else if (c4 == PGDN) {
shimniok 21:5d7ac1f0b842 391 printf("<PGDN>");
shimniok 21:5d7ac1f0b842 392 }//if
shimniok 21:5d7ac1f0b842 393 }//if
shimniok 21:5d7ac1f0b842 394 }//if
shimniok 21:5d7ac1f0b842 395 }//if
shimniok 21:5d7ac1f0b842 396 //printf("\n");
shimniok 21:5d7ac1f0b842 397 } else if (i < MAXBUF-1) {
shimniok 21:5d7ac1f0b842 398 if (c == 0x7f || c == '\b') { // backspace or delete
shimniok 21:5d7ac1f0b842 399 if (i > 0) { // if we're at the beginning, do nothing
shimniok 21:5d7ac1f0b842 400 i--;
shimniok 21:5d7ac1f0b842 401 fputs("\b \b", stdout);
shimniok 21:5d7ac1f0b842 402 }
shimniok 21:5d7ac1f0b842 403 } else {
shimniok 21:5d7ac1f0b842 404 if (isprint(c))
shimniok 21:5d7ac1f0b842 405 fputc(c, stdout);
shimniok 21:5d7ac1f0b842 406 cmd[i++] = c;
shimniok 21:5d7ac1f0b842 407 }
shimniok 21:5d7ac1f0b842 408 }
shimniok 21:5d7ac1f0b842 409
shimniok 21:5d7ac1f0b842 410 } while (!done);
shimniok 21:5d7ac1f0b842 411 fputc('\n', stdout);
shimniok 21:5d7ac1f0b842 412
shimniok 21:5d7ac1f0b842 413 // remove leading/trailing whitespace
shimniok 21:5d7ac1f0b842 414 char *s = cmd;
shimniok 21:5d7ac1f0b842 415 while (isspace(*s)) {
shimniok 21:5d7ac1f0b842 416 s++;
shimniok 21:5d7ac1f0b842 417 }
shimniok 21:5d7ac1f0b842 418 for (int j=i; j >= 0 && isspace(cmd[j]); j--) {
shimniok 21:5d7ac1f0b842 419 cmd[j] = '\0';
shimniok 21:5d7ac1f0b842 420 }
shimniok 21:5d7ac1f0b842 421
shimniok 21:5d7ac1f0b842 422 // split into command and arguments
shimniok 21:5d7ac1f0b842 423 argc = 0;
shimniok 21:5d7ac1f0b842 424 char *t;
shimniok 21:5d7ac1f0b842 425
shimniok 21:5d7ac1f0b842 426 for (int i=0; i < MAXARGS; i++) {
shimniok 21:5d7ac1f0b842 427 argv[i] = NULL;
shimniok 21:5d7ac1f0b842 428 }
shimniok 21:5d7ac1f0b842 429 t = strtok(s, " ");
shimniok 30:35522ea06236 430 while (t && argc < MAXARGS) {
shimniok 21:5d7ac1f0b842 431 argv[argc++] = t;
shimniok 21:5d7ac1f0b842 432 t = strtok(NULL, " ");
shimniok 21:5d7ac1f0b842 433 }
shimniok 21:5d7ac1f0b842 434
shimniok 21:5d7ac1f0b842 435 return;
shimniok 21:5d7ac1f0b842 436 }