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