Usermode/Applications/CLIShell_src/main.c

   1 /*\r
   2  * AcessOS Shell Version 3\r
   3  */\r
   4 #define USE_READLINE    1\r
   5 #include <acess/sys.h>\r
   6 #include <stdlib.h>\r
   7 #include <stdio.h>\r
   8 #include <string.h>\r
   9 #include "header.h"\r
  10 #include <readline.h>\r
  11 #include <errno.h>\r
  12 \r
  13 #define _stdin  0\r
  14 #define _stdout 1\r
  15 #define _stderr 2\r
  16 \r
  17 // ==== PROTOTYPES ====\r
  18  int    Parse_Args(const char *str, char **dest);\r
  19 void    CallCommand(char **Args);\r
  20 void    Command_Logout(int argc, char **argv);\r
  21 void    Command_Clear(int argc, char **argv);\r
  22 void    Command_Help(int argc, char **argv);\r
  23 void    Command_Cd(int argc, char **argv);\r
  24 void    Command_Dir(int argc, char **argv);\r
  25 \r
  26 // ==== CONSTANT GLOBALS ====\r
  27 struct  {\r
  28         char    *name;\r
  29         void    (*fcn)(int argc, char **argv);\r
  30 }       cBUILTINS[] = {\r
  31         {"exit", Command_Logout},       {"logout", Command_Logout},\r
  32         {"help", Command_Help}, {"clear", Command_Clear},\r
  33         {"cd", Command_Cd}, {"dir", Command_Dir}\r
  34 };\r
  35 static char     *cDEFAULT_PATH[] = {"/Acess/Bin"};\r
  36 #define BUILTIN_COUNT   (sizeof(cBUILTINS)/sizeof(cBUILTINS[0]))\r
  37 \r
  38 // ==== LOCAL VARIABLES ====\r
  39  int    giNumPathDirs = 1;\r
  40 char    **gasPathDirs = cDEFAULT_PATH;\r
  41 char    **gasEnvironment;\r
  42 char    gsCommandBuffer[1024];\r
  43 char    *gsCurrentDirectory = NULL;\r
  44 char    **gasCommandHistory;\r
  45  int    giLastCommand = 0;\r
  46  int    giCommandSpace = 0;\r
  47 \r
  48 // ==== CODE ====\r
  49 int main(int argc, char *argv[], char **envp)\r
  50 {\r
  51         char    *sCommandStr;\r
  52         char    *saArgs[32] = {0};\r
  53          int    i;\r
  54          int    iArgCount = 0;\r
  55         tReadline       *readline_state = Readline_Init(1);\r
  56         \r
  57         gasEnvironment = envp;\r
  58         \r
  59         Command_Clear(0, NULL);\r
  60         \r
  61         {\r
  62                 char    *tmp = getenv("CWD");\r
  63                 if(tmp) {\r
  64                         gsCurrentDirectory = malloc(strlen(tmp)+1);\r
  65                         strcpy(gsCurrentDirectory, tmp);\r
  66                 } else {\r
  67                         gsCurrentDirectory = malloc(2);\r
  68                         strcpy(gsCurrentDirectory, "/");\r
  69                 }\r
  70         }       \r
  71         \r
  72         printf("Acess Shell Version 3\n\n");\r
  73         for(;;)\r
  74         {\r
  75                 // Free last command & arguments\r
  76                 if(saArgs[0])   free(saArgs[0]);\r
  77                 \r
  78                 printf("%s$ ", gsCurrentDirectory);\r
  79                 fflush(stdout);\r
  80                 \r
  81                 // Read Command line\r
  82                 sCommandStr = Readline( readline_state );\r
  83                 printf("\n");\r
  84                 if( !sCommandStr ) {\r
  85                         perror("Readline");\r
  86                         return 1;\r
  87                 }\r
  88                 \r
  89                 // Parse Command Line into arguments\r
  90                 iArgCount = Parse_Args(sCommandStr, saArgs);\r
  91                 \r
  92                 // Silently Ignore all empty commands\r
  93                 if(saArgs[1][0] == '\0')        continue;\r
  94                 \r
  95                 // Check Built-In Commands\r
  96                 for( i = 0; i < BUILTIN_COUNT; i++ )\r
  97                 {\r
  98                         if( strcmp(saArgs[1], cBUILTINS[i].name) == 0 )\r
  99                         {\r
 100                                 cBUILTINS[i].fcn(iArgCount-1, &saArgs[1]);\r
 101                                 break;\r
 102                         }\r
 103                 }\r
 104                 if(i != BUILTIN_COUNT)  continue;\r
 105                 \r
 106                 // Shall we?\r
 107                 CallCommand( &saArgs[1] );\r
 108                 \r
 109                 free( sCommandStr );\r
 110         }\r
 111 }\r
 112 \r
 113 /**\r
 114  * \fn int Parse_Args(const char *str, char **dest)\r
 115  * \brief Parse a string into an argument array\r
 116  */\r
 117 int Parse_Args(const char *str, char **dest)\r
 118 {\r
 119          int    i = 1;\r
 120         char    *buf = malloc( strlen(str) + 1 );\r
 121         \r
 122         if(buf == NULL) {\r
 123                 dest[0] = NULL;\r
 124                 printf("Parse_Args: Out of heap space!\n");\r
 125                 return 0;\r
 126         }\r
 127         \r
 128         strcpy(buf, str);\r
 129         dest[0] = buf;\r
 130         \r
 131         // Trim leading whitespace\r
 132         while(*buf == ' ' && *buf)      buf++;\r
 133         \r
 134         for(;;)\r
 135         {\r
 136                 dest[i] = buf;  // Save start of string\r
 137                 i++;\r
 138                 while(*buf && *buf != ' ')\r
 139                 {\r
 140                         if(*buf++ == '"')\r
 141                         {\r
 142                                 while(*buf && !(*buf == '"' && buf[-1] != '\\'))\r
 143                                         buf++;\r
 144                         }\r
 145                 }\r
 146                 if(*buf == '\0')        break;\r
 147                 *buf = '\0';\r
 148                 while(*++buf == ' ' && *buf);\r
 149                 if(*buf == '\0')        break;\r
 150         }\r
 151         dest[i] = NULL;\r
 152         \r
 153         return i;\r
 154 }\r
 155 \r
 156 /**\r
 157  * \fn void CallCommand(char **Args)\r
 158  */\r
 159 void CallCommand(char **Args)\r
 160 {\r
 161         t_sysFInfo      info;\r
 162          int    pid = -1;\r
 163          int    fd = 0;\r
 164         char    sTmpBuffer[1024];\r
 165         char    *exefile = Args[0];\r
 166         \r
 167         if(exefile[0] == '/'\r
 168         || (exefile[0] == '.' && exefile[1] == '/')\r
 169         || (exefile[0] == '.' && exefile[1] == '.' && exefile[2] == '/')\r
 170                 )\r
 171         {\r
 172                 GeneratePath(exefile, gsCurrentDirectory, sTmpBuffer);\r
 173                 // Check file existence\r
 174                 fd = _SysOpen(sTmpBuffer, OPENFLAG_EXEC);\r
 175                 if(fd == -1) {\r
 176                         printf("Unknown Command: `%s'\n", Args[0]);     // Error Message\r
 177                         return ;\r
 178                 }\r
 179                 \r
 180                 // Get File info and close file\r
 181                 _SysFInfo( fd, &info, 0 );\r
 182                 _SysClose( fd );\r
 183                 \r
 184                 // Check if the file is a directory\r
 185                 if(info.flags & FILEFLAG_DIRECTORY) {\r
 186                         printf("`%s' is a directory.\n", sTmpBuffer);\r
 187                         return ;\r
 188                 }\r
 189         }\r
 190         else\r
 191         {\r
 192                  int    i;\r
 193                 \r
 194                 // Check all components of $PATH\r
 195                 for( i = 0; i < giNumPathDirs; i++ )\r
 196                 {\r
 197                         GeneratePath(exefile, gasPathDirs[i], sTmpBuffer);\r
 198                         fd = _SysOpen(sTmpBuffer, OPENFLAG_EXEC);\r
 199                         if(fd == -1)    continue;\r
 200                         _SysFInfo( fd, &info, 0 );\r
 201                         _SysClose( fd );\r
 202                         if(info.flags & FILEFLAG_DIRECTORY)     continue;\r
 203                         // Woohoo! We found a valid command\r
 204                         break;\r
 205                 }\r
 206                 \r
 207                 // Exhausted path directories\r
 208                 if( i == giNumPathDirs ) {\r
 209                         printf("Unknown Command: `%s'\n", exefile);\r
 210                         return ;\r
 211                 }\r
 212         }\r
 213         \r
 214         // Create new process\r
 215         int fds[] = {0, 1, 2};\r
 216         pid = _SysSpawn(sTmpBuffer, (const char **)Args, (const char **)gasEnvironment, 3, fds, NULL);\r
 217         if(pid <= 0) {\r
 218                 printf("Unable to create process: `%s'\n", sTmpBuffer); // Error Message\r
 219         }\r
 220         else {\r
 221                  int    status;\r
 222                 _SysWaitTID(pid, &status);\r
 223         }\r
 224 }\r
 225 \r
 226 /**\r
 227  * \fn void Command_Logout(int argc, char **argv)\r
 228  * \brief Exit the shell, logging the user out\r
 229  */\r
 230 void Command_Logout(int argc, char **argv)\r
 231 {\r
 232         exit(0);\r
 233 }\r
 234 \r
 235 /**\r
 236  * \fn void Command_Colour(int argc, char **argv)\r
 237  * \brief Displays the help screen\r
 238  */\r
 239 void Command_Help(int argc, char **argv)\r
 240 {\r
 241         printf( "Acess 2 Command Line Interface\n"\r
 242                 " By John Hodge (thePowersGang / [TPG])\n"\r
 243                 "\n"\r
 244                 "Builtin Commands:\n"\r
 245                 " logout: Return to the login prompt\n"\r
 246                 " exit:   Same\n"\r
 247                 " help:   Display this message\n"\r
 248                 " clear:  Clear the screen\n"\r
 249                 " cd:     Change the current directory\n"\r
 250                 " dir:    Print the contents of the current directory\n");\r
 251         return;\r
 252 }\r
 253 \r
 254 /**\r
 255  * \fn void Command_Clear(int argc, char **argv)\r
 256  * \brief Clear the screen\r
 257  */\r
 258 void Command_Clear(int argc, char **argv)\r
 259 {\r
 260         _SysWrite(_stdout, "\x1B[2J", 4);       //Clear Screen\r
 261 }\r
 262 \r
 263 /**\r
 264  * \fn void Command_Cd(int argc, char **argv)\r
 265  * \brief Change directory\r
 266  */\r
 267 void Command_Cd(int argc, char **argv)\r
 268 {\r
 269         char    tmpPath[1024];\r
 270         int             fp;\r
 271         t_sysFInfo      stats;\r
 272         \r
 273         if(argc < 2)\r
 274         {\r
 275                 printf("%s\n", gsCurrentDirectory);\r
 276                 return;\r
 277         }\r
 278         \r
 279         GeneratePath(argv[1], gsCurrentDirectory, tmpPath);\r
 280         \r
 281         fp = _SysOpen(tmpPath, 0);\r
 282         if(fp == -1) {\r
 283                 printf("Directory does not exist\n");\r
 284                 return;\r
 285         }\r
 286         _SysFInfo(fp, &stats, 0);\r
 287         _SysClose(fp);\r
 288         \r
 289         if( !(stats.flags & FILEFLAG_DIRECTORY) ) {\r
 290                 printf("Not a Directory\n");\r
 291                 return;\r
 292         }\r
 293         \r
 294         free(gsCurrentDirectory);\r
 295         gsCurrentDirectory = malloc(strlen(tmpPath)+1);\r
 296         strcpy(gsCurrentDirectory, tmpPath);\r
 297         \r
 298         // Register change with kernel\r
 299         _SysChdir( gsCurrentDirectory );\r
 300 }\r
 301 \r
 302 /**\r
 303  * \fn void Command_Dir(int argc, char **argv)\r
 304  * \brief Print the contents of a directory\r
 305  */\r
 306 void Command_Dir(int argc, char **argv)\r
 307 {\r
 308          int    dp, fp;\r
 309         char    modeStr[11] = "RWXrwxRWX ";\r
 310         char    fileName[256];\r
 311         t_sysFInfo      info;\r
 312         t_sysACL        acl;\r
 313         \r
 314 \r
 315         // -- Generate and open directory --\r
 316         // Generate Directory Path\r
 317         char    tmpPath[1024];\r
 318         if(argc > 1)\r
 319                 GeneratePath(argv[1], gsCurrentDirectory, tmpPath);\r
 320         else\r
 321                 strcpy(tmpPath, gsCurrentDirectory);\r
 322         // Open Directory\r
 323         dp = _SysOpen(tmpPath, OPENFLAG_READ);\r
 324         if(dp == -1) {\r
 325                 printf("Unable to open directory `%s', File cannot be found\n", tmpPath);\r
 326                 return;\r
 327         }\r
 328         // Get File Stats\r
 329         if( _SysFInfo(dp, &info, 0) == -1 )\r
 330         {\r
 331                 _SysClose(dp);\r
 332                 printf("stat Failed, Bad File Descriptor\n");\r
 333                 return;\r
 334         }\r
 335         // Check if it's a directory\r
 336         if(!(info.flags & FILEFLAG_DIRECTORY))\r
 337         {\r
 338                 _SysClose(dp);\r
 339                 printf("Unable to open directory `%s', Not a directory\n", tmpPath);\r
 340                 return;\r
 341         }\r
 342         \r
 343         // -- Read Directory Contents --\r
 344         while( (fp = _SysReadDir(dp, fileName)) )\r
 345         {\r
 346                 if(fp < 0)\r
 347                 {\r
 348                         if(fp == -3)\r
 349                                 printf("Invalid Permissions to traverse directory\n");\r
 350                         break;\r
 351                 }\r
 352                 // Open File\r
 353                 fp = _SysOpenChild(dp, fileName, 0);\r
 354                 if(fp == -1)    continue;\r
 355                 // Get File Stats\r
 356                 _SysFInfo(fp, &info, 0);\r
 357                 \r
 358                 if(info.flags & FILEFLAG_DIRECTORY)\r
 359                         printf("d");\r
 360                 else\r
 361                         printf("-");\r
 362                 \r
 363                 // Print Mode\r
 364                 // - Owner\r
 365                 acl.object = info.uid;\r
 366                 _SysGetACL(fp, &acl);\r
 367                 if(acl.perms & 1)       modeStr[0] = 'r';       else    modeStr[0] = '-';\r
 368                 if(acl.perms & 2)       modeStr[1] = 'w';       else    modeStr[1] = '-';\r
 369                 if(acl.perms & 8)       modeStr[2] = 'x';       else    modeStr[2] = '-';\r
 370                 // - Group\r
 371                 acl.object = info.gid | 0x80000000;\r
 372                 _SysGetACL(fp, &acl);\r
 373                 if(acl.perms & 1)       modeStr[3] = 'r';       else    modeStr[3] = '-';\r
 374                 if(acl.perms & 2)       modeStr[4] = 'w';       else    modeStr[4] = '-';\r
 375                 if(acl.perms & 8)       modeStr[5] = 'x';       else    modeStr[5] = '-';\r
 376                 // - World\r
 377                 acl.object = 0xFFFFFFFF;\r
 378                 _SysGetACL(fp, &acl);\r
 379                 if(acl.perms & 1)       modeStr[6] = 'r';       else    modeStr[6] = '-';\r
 380                 if(acl.perms & 2)       modeStr[7] = 'w';       else    modeStr[7] = '-';\r
 381                 if(acl.perms & 8)       modeStr[8] = 'x';       else    modeStr[8] = '-';\r
 382                 printf(modeStr);\r
 383                 _SysClose(fp);\r
 384                 \r
 385                 // Colour Code\r
 386                 if(info.flags & FILEFLAG_DIRECTORY)     // Directory: Green\r
 387                         printf("\x1B[32m");\r
 388                 // Default: White\r
 389                 \r
 390                 // Print Name\r
 391                 printf("%s", fileName);\r
 392                 \r
 393                 // Print slash if applicable\r
 394                 if(info.flags & FILEFLAG_DIRECTORY)\r
 395                         printf("/");\r
 396                 \r
 397                 // Revert Colour\r
 398                 printf("\x1B[37m");\r
 399                 \r
 400                 // Newline!\r
 401                 printf("\n");\r
 402         }\r
 403         // Close Directory\r
 404         _SysClose(dp);\r
 405 }\r