Usermode/Applications/CLIShell_src/main.c

   1 /*\r
   2  * AcessOS Shell Version 3\r
   3  */\r
   4 #include <acess/sys.h>\r
   5 #include <stdlib.h>\r
   6 #include <stdio.h>\r
   7 #include "header.h"\r
   8 \r
   9 #define _stdin  0\r
  10 #define _stdout 1\r
  11 #define _stderr 2\r
  12 \r
  13 // ==== PROTOTYPES ====\r
  14 char    *ReadCommandLine(int *Length);\r
  15 void    Parse_Args(char *str, char **dest);\r
  16 void    Command_Colour(int argc, char **argv);\r
  17 void    Command_Clear(int argc, char **argv);\r
  18 void    Command_Cd(int argc, char **argv);\r
  19 void    Command_Dir(int argc, char **argv);\r
  20 \r
  21 // ==== CONSTANT GLOBALS ====\r
  22 char    *cCOLOUR_NAMES[8] = {"black", "red", "green", "yellow", "blue", "magenta", "cyan", "white"};\r
  23 struct  {\r
  24         char    *name;\r
  25         void    (*fcn)(int argc, char **argv);\r
  26 }       cBUILTINS[] = {\r
  27         {"colour", Command_Colour}, {"clear", Command_Clear},\r
  28         {"cd", Command_Cd}, {"dir", Command_Dir}\r
  29 };\r
  30 #define BUILTIN_COUNT   (sizeof(cBUILTINS)/sizeof(cBUILTINS[0]))\r
  31 \r
  32 // ==== LOCAL VARIABLES ====\r
  33 char    gsCommandBuffer[1024];\r
  34 char    *gsCurrentDirectory = NULL;\r
  35 char    gsTmpBuffer[1024];\r
  36 char    **gasCommandHistory;\r
  37  int    giLastCommand = 0;\r
  38  int    giCommandSpace = 0;\r
  39 \r
  40 // ==== CODE ====\r
  41 int main(int argc, char *argv[], char *envp[])\r
  42 {\r
  43         char    *sCommandStr;\r
  44         char    *saArgs[32];\r
  45          int    length = 0;\r
  46          int    pid = -1;\r
  47          int    iArgCount = 0;\r
  48          int    bCached = 1;\r
  49         t_sysFInfo      info;\r
  50         \r
  51         //Command_Clear(0, NULL);\r
  52         \r
  53         {\r
  54                 char    *tmp = getenv("CWD");\r
  55                 if(tmp) {\r
  56                         gsCurrentDirectory = malloc(strlen(tmp)+1);\r
  57                         strcpy(gsCurrentDirectory, tmp);\r
  58                 } else {\r
  59                         gsCurrentDirectory = malloc(2);\r
  60                         strcpy(gsCurrentDirectory, "/");\r
  61                 }\r
  62         }       \r
  63         \r
  64         write(_stdout, 1, "\n");\r
  65         write(_stdout, 22, "Acess Shell Version 3\n");\r
  66         write(_stdout,  2, "\n");\r
  67         for(;;)\r
  68         {\r
  69                 // Free last command & arguments\r
  70                 if(saArgs[0])   free(saArgs);\r
  71                 if(!bCached)    free(sCommandStr);\r
  72                 bCached = 0;\r
  73                 write(_stdout, 1, "\n");\r
  74                 write(_stdout, strlen(gsCurrentDirectory), gsCurrentDirectory);\r
  75                 write(_stdout, 3, "$ ");\r
  76                 \r
  77                 // Read Command line\r
  78                 sCommandStr = ReadCommandLine( &length );\r
  79                 \r
  80                 // Check if the command should be cached\r
  81                 if(gasCommandHistory == NULL || strcmp(sCommandStr, gasCommandHistory[giLastCommand]) != 0)\r
  82                 {\r
  83                         if(giLastCommand >= giCommandSpace) {\r
  84                                 giCommandSpace += 12;\r
  85                                 gasCommandHistory = realloc(gasCommandHistory, giCommandSpace*sizeof(char*));\r
  86                         }\r
  87                         giLastCommand ++;\r
  88                         gasCommandHistory[ giLastCommand ] = sCommandStr;\r
  89                         bCached = 1;\r
  90                 }\r
  91                 \r
  92                 // Parse Command Line into arguments\r
  93                 Parse_Args(sCommandStr, saArgs);\r
  94                 \r
  95                 // Count Arguments\r
  96                 iArgCount = 0;\r
  97                 while(saArgs[iArgCount])        iArgCount++;\r
  98                 \r
  99                 // Silently Ignore all empty commands\r
 100                 if(saArgs[1][0] == '\0')        continue;\r
 101                 \r
 102                 // Check Built-In Commands\r
 103                 //  [HACK] Mem Usage - Use Length in place of `i'\r
 104                 for(length=0;length<BUILTIN_COUNT;length++)\r
 105                 {\r
 106                         if(strcmp(saArgs[1], cBUILTINS[length].name) == 0)\r
 107                         {\r
 108                                 cBUILTINS[length].fcn(iArgCount-1, &saArgs[1]);\r
 109                                 break;\r
 110                         }\r
 111                 }\r
 112                 \r
 113                 if(length != BUILTIN_COUNT)     continue;\r
 114
 115                 // - Calling a file\r
 116                 GeneratePath(saArgs[1], gsCurrentDirectory, gsTmpBuffer);\r
 117                 // Use length in place of fp\r
 118                 length = open(gsTmpBuffer, 0);\r
 119                 // Check file existence\r
 120                 if(length == -1) {\r
 121                         Print("Unknown Command: `");Print(saArgs[1]);Print("'\n");      // Error Message\r
 122                         continue;\r
 123                 }\r
 124                 // Check if the file is a directory\r
 125                 finfo( length, &info, 0 );
 126                 close( length );\r
 127                 if(info.flags & FILEFLAG_DIRECTORY) {\r
 128                         Print("`");Print(saArgs[1]);    // Error Message\r
 129                         Print("' is a directory.\n");\r
 130                         continue;\r
 131                 }\r
 132                 // Load new executable\r
 133                 pid = clone(CLONE_VM, 0);\r
 134                 if(pid == 0)    execve(gsTmpBuffer, &saArgs[1], envp);\r
 135                 if(pid <= 0) {\r
 136                         Print("Unablt to create process: `");Print(gsTmpBuffer);Print("'\n");   // Error Message
 137                         //SysDebug("pid = %i\n", pid);\r
 138                 }\r
 139                 else {\r
 140                          int    status;\r
 141                         waittid(pid, &status);\r
 142                 }\r
 143         }\r
 144 }\r
 145 \r
 146 /**\r
 147  * \fn char *ReadCommandLine(int *Length)\r
 148  * \brief Read from the command line\r
 149  */\r
 150 char *ReadCommandLine(int *Length)\r
 151 {\r
 152         char    *ret;\r
 153          int    len, pos, space = 1023;\r
 154         char    ch;\r
 155          \r
 156         // Preset Variables\r
 157         ret = malloc( space+1 );\r
 158         len = 0;\r
 159         pos = 0;\r
 160                 \r
 161         // Read In Command Line\r
 162         do {\r
 163                 read(_stdin, 1, &ch);   // Read Character from stdin (read is a blocking call)\r
 164                 // Ignore control characters\r
 165                 if(ch < 0)      continue;\r
 166                 // Backspace\r
 167                 if(ch == '\b') {\r
 168                         if(len <= 0)            continue;       // Protect against underflows\r
 169                         if(pos == len) {        // Simple case of end of string\r
 170                                 len --; pos--;\r
 171                         } else {\r
 172                                 memmove(&ret[pos-1], &ret[pos], len-pos);\r
 173                                 pos --;\r
 174                                 len --;\r
 175                         }\r
 176                         write(_stdout, 1, &ch);\r
 177                         continue;\r
 178                 }\r
 179                 // Expand Buffer\r
 180                 if(len > space) {\r
 181                         space += 256;\r
 182                         ret = realloc(ret, space+1);\r
 183                         if(!ret)        return NULL;\r
 184                 }\r
 185                 \r
 186                 write(_stdout, 1, &ch);\r
 187                 ret[pos++] = ch;\r
 188                 len ++;\r
 189         } while(ch != '\n');\r
 190         \r
 191         // Remove newline\r
 192         pos --;\r
 193         ret[pos] = '\0';\r
 194         \r
 195         // Return length\r
 196         if(Length)      *Length = len;\r
 197         \r
 198         return ret;\r
 199 }\r
 200 \r
 201 /**\r
 202  * \fn void Parse_Args(char *str, char **dest)\r
 203  * \brief Parse a string into an argument array\r
 204  */\r
 205 void Parse_Args(char *str, char **dest)\r
 206 {\r
 207          int    i = 1;\r
 208         char    *buf = malloc( strlen(str) + 1 );\r
 209         \r
 210         strcpy(buf, str);\r
 211         dest[0] = buf;\r
 212         \r
 213         // Trim leading whitespace\r
 214         while(*buf == ' ' && *buf)      buf++;\r
 215         \r
 216         for(;;)\r
 217         {\r
 218                 dest[i] = buf;  // Save start of string\r
 219                 i++;\r
 220                 while(*buf && *buf != ' ')\r
 221                 {\r
 222                         if(*buf++ == '"')\r
 223                         {\r
 224                                 while(*buf && !(*buf == '"' && buf[-1] != '\\'))\r
 225                                         buf++;\r
 226                         }\r
 227                 }\r
 228                 if(*buf == '\0')        break;\r
 229                 *buf = '\0';\r
 230                 while(*++buf == ' ' && *buf);\r
 231                 if(*buf == '\0')        break;\r
 232         }\r
 233         dest[i] = NULL;\r
 234         if(i == 1) {\r
 235                 free(buf);\r
 236                 dest[0] = NULL;\r
 237         }\r
 238 }\r
 239 \r
 240 /**\r
 241  * \fn void Command_Colour(int argc, char **argv)\r
 242  * \brief \r
 243  */\r
 244 void Command_Colour(int argc, char **argv)\r
 245 {\r
 246         int fg, bg;\r
 247         char    clrStr[6] = "\x1B[37m";\r
 248         \r
 249         // Verify Arg Count\r
 250         if(argc < 2)\r
 251         {\r
 252                 Print("Please specify a colour\n");\r
 253                 goto usage;\r
 254         }\r
 255         \r
 256         // Check Colour\r
 257         for(fg=0;fg<8;fg++)\r
 258                 if(strcmp(cCOLOUR_NAMES[fg], argv[1]) == 0)\r
 259                         break;\r
 260 \r
 261         // Foreground a valid colour\r
 262         if(fg == 8) {\r
 263                 Print("Unknown Colour '");Print(argv[1]);Print("'\n");\r
 264                 goto usage;\r
 265         }\r
 266         // Set Foreground\r
 267         clrStr[3] = '0' + fg;\r
 268         write(_stdout, 6, clrStr);\r
 269         \r
 270         // Need to Set Background?\r
 271         if(argc > 2)\r
 272         {\r
 273                 for(bg=0;bg<8;bg++)\r
 274                         if(strcmp(cCOLOUR_NAMES[bg], argv[2]) == 0)\r
 275                                 break;\r
 276         \r
 277                 // Valid colour\r
 278                 if(bg == 8)\r
 279                 {\r
 280                         Print("Unknown Colour '");Print(argv[2]);Print("'\n");\r
 281                         goto usage;\r
 282                 }\r
 283         \r
 284                 clrStr[2] = '4';\r
 285                 clrStr[3] = '0' + bg;\r
 286                 write(_stdout, 6, clrStr);\r
 287         }\r
 288         // Return\r
 289         return;\r
 290 \r
 291         // Function Usage (Requested via a Goto (I know it's ugly))\r
 292 usage:\r
 293         Print("Valid Colours are ");\r
 294         for(fg=0;fg<8;fg++)\r
 295         {\r
 296                 Print(cCOLOUR_NAMES[fg]);\r
 297                 write(_stdout, 3, ", ");\r
 298         }\r
 299         write(_stdout, 4, "\b\b\n");\r
 300         return;\r
 301 }\r
 302 \r
 303 void Command_Clear(int argc, char **argv)\r
 304 {\r
 305         write(_stdout, 4, "\x1B[2J");   //Clear Screen\r
 306 }\r
 307 \r
 308 /**\r
 309  * \fn void Command_Cd(int argc, char **argv)\r
 310  * \brief Change directory\r
 311  */\r
 312 void Command_Cd(int argc, char **argv)\r
 313 {\r
 314         char    tmpPath[1024];\r
 315         int             fp;\r
 316         t_sysFInfo      stats;\r
 317         \r
 318         if(argc < 2)\r
 319         {\r
 320                 Print(gsCurrentDirectory);Print("\n");\r
 321                 return;\r
 322         }\r
 323         \r
 324         GeneratePath(argv[1], gsCurrentDirectory, tmpPath);\r
 325         \r
 326         fp = open(tmpPath, 0);\r
 327         if(fp == -1) {\r
 328                 write(_stdout, 26, "Directory does not exist\n");\r
 329                 return;\r
 330         }\r
 331         finfo(fp, &stats, 0);\r
 332         close(fp);\r
 333         \r
 334         if( !(stats.flags & FILEFLAG_DIRECTORY) ) {\r
 335                 write(_stdout, 17, "Not a Directory\n");\r
 336                 return;\r
 337         }\r
 338         \r
 339         free(gsCurrentDirectory);\r
 340         gsCurrentDirectory = malloc(strlen(tmpPath)+1);\r
 341         strcpy(gsCurrentDirectory, tmpPath);\r
 342 }\r
 343 \r
 344 /**\r
 345  */\r
 346 void Command_Dir(int argc, char **argv)\r
 347 {\r
 348          int    dp, fp, dirLen;\r
 349         char    modeStr[11] = "RWXrwxRWX ";\r
 350         char    tmpPath[1024];\r
 351         char    *fileName;\r
 352         t_sysFInfo      info;\r
 353         t_sysACL        acl;\r
 354         \r
 355         // Generate Directory Path\r
 356         if(argc > 1)\r
 357                 dirLen = GeneratePath(argv[1], gsCurrentDirectory, tmpPath);\r
 358         else\r
 359         {\r
 360                 strcpy(tmpPath, gsCurrentDirectory);\r
 361         }\r
 362         dirLen = strlen(tmpPath);\r
 363         \r
 364         // Open Directory\r
 365         dp = open(tmpPath, OPENFLAG_READ);\r
 366         // Check if file opened\r
 367         if(dp == -1)\r
 368         {\r
 369                 //printf("Unable to open directory `%s', File cannot be found\n", tmpPath);\r
 370                 write(_stdout, 27, "Unable to open directory `");\r
 371                 write(_stdout, strlen(tmpPath)+1, tmpPath);\r
 372                 write(_stdout, 25, "', File cannot be found\n");\r
 373                 return;\r
 374         }\r
 375         // Get File Stats\r
 376         if( finfo(dp, &info, 0) == -1 )\r
 377         {\r
 378                 close(dp);\r
 379                 write(_stdout, 34, "stat Failed, Bad File Descriptor\n");\r
 380                 return;\r
 381         }\r
 382         // Check if it's a directory\r
 383         if(!(info.flags & FILEFLAG_DIRECTORY))\r
 384         {\r
 385                 close(dp);\r
 386                 write(_stdout, 27, "Unable to open directory `");\r
 387                 write(_stdout, strlen(tmpPath)+1, tmpPath);\r
 388                 write(_stdout, 20, "', Not a directory\n");\r
 389                 return;\r
 390         }\r
 391         \r
 392         // Append Shash for file paths\r
 393         if(tmpPath[dirLen-1] != '/')\r
 394         {\r
 395                 tmpPath[dirLen++] = '/';\r
 396                 tmpPath[dirLen] = '\0';\r
 397         }\r
 398         \r
 399         fileName = (char*)(tmpPath+dirLen);\r
 400         // Read Directory Content\r
 401         while( (fp = readdir(dp, fileName)) )\r
 402         {\r
 403                 if(fp < 0)\r
 404                 {\r
 405                         if(fp == -3)\r
 406                                 write(_stdout, 42, "Invalid Permissions to traverse directory\n");\r
 407                         break;\r
 408                 }\r
 409                 // Open File\r
 410                 fp = open(tmpPath, 0);\r
 411                 if(fp == -1)    continue;\r
 412                 // Get File Stats\r
 413                 finfo(fp, &info, 0);\r
 414                 \r
 415                 //Print Mode\r
 416                 //#if 0\r
 417                 acl.group = 0;  acl.id = info.uid;\r
 418                 _SysGetACL(fp, &acl);\r
 419                 if(acl.perms & 1)       modeStr[0] = 'r';       else    modeStr[0] = '-';\r
 420                 if(acl.perms & 2)       modeStr[1] = 'w';       else    modeStr[1] = '-';\r
 421                 if(acl.perms & 8)       modeStr[2] = 'x';       else    modeStr[2] = '-';\r
 422                 acl.group = 1;  acl.id = info.gid;\r
 423                 _SysGetACL(fp, &acl);\r
 424                 if(acl.perms & 1)       modeStr[3] = 'r';       else    modeStr[3] = '-';\r
 425                 if(acl.perms & 1)       modeStr[4] = 'w';       else    modeStr[4] = '-';\r
 426                 if(acl.perms & 1)       modeStr[5] = 'x';       else    modeStr[5] = '-';\r
 427                 acl.group = 1;  acl.id = -1;\r
 428                 _SysGetACL(fp, &acl);\r
 429                 if(acl.perms & 1)       modeStr[6] = 'r';       else    modeStr[6] = '-';\r
 430                 if(acl.perms & 1)       modeStr[7] = 'w';       else    modeStr[7] = '-';\r
 431                 if(acl.perms & 1)       modeStr[8] = 'x';       else    modeStr[8] = '-';\r
 432                 write(_stdout, 10, modeStr);\r
 433                 //#endif\r
 434                 close(fp);\r
 435                 \r
 436                 // Colour Code\r
 437                 if(info.flags & FILEFLAG_DIRECTORY)     // Directory: Green\r
 438                         write(_stdout, 6, "\x1B[32m");\r
 439                 else\r
 440                         write(_stdout, 6, "\x1B[37m");  // Default: White\r
 441                 // Print Name\r
 442                 write(_stdout, strlen(fileName), fileName);\r
 443                 // Print slash if applicable\r
 444                 if(info.flags & FILEFLAG_DIRECTORY)\r
 445                         write(_stdout, 1, "/");\r
 446                 \r
 447                 // Revert Colour\r
 448                 write(_stdout, 6, "\x1B[37m");\r
 449                 \r
 450                 // Put Size\r
 451                 printf("\n", info.size);\r
 452                 \r
 453                 //write(_stdout, 1, "\n");\r
 454         }\r
 455         // Close Directory\r
 456         close(dp);\r
 457 }\r