2 * AcessOS Shell Version 3
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4 #include <acess/sys.h>
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14 // ==== PROTOTYPES ====
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15 char *ReadCommandLine(int *Length);
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16 void Parse_Args(char *str, char **dest);
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17 void CallCommand(char **Args);
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18 void Command_Logout(int argc, char **argv);
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19 void Command_Clear(int argc, char **argv);
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20 void Command_Help(int argc, char **argv);
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21 void Command_Cd(int argc, char **argv);
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22 void Command_Dir(int argc, char **argv);
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24 // ==== CONSTANT GLOBALS ====
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27 void (*fcn)(int argc, char **argv);
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29 {"exit", Command_Logout}, {"logout", Command_Logout},
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30 {"help", Command_Help}, {"clear", Command_Clear},
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31 {"cd", Command_Cd}, {"dir", Command_Dir}
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33 static char *cDEFAULT_PATH[] = {"/Acess/Bin"};
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34 #define BUILTIN_COUNT (sizeof(cBUILTINS)/sizeof(cBUILTINS[0]))
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36 // ==== LOCAL VARIABLES ====
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37 int giNumPathDirs = 1;
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38 char **gasPathDirs = cDEFAULT_PATH;
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39 char **gasEnvironment;
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40 char gsCommandBuffer[1024];
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41 char *gsCurrentDirectory = NULL;
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42 char **gasCommandHistory;
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43 int giLastCommand = 0;
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44 int giCommandSpace = 0;
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47 int main(int argc, char *argv[], char *envp[])
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50 char *saArgs[32] = {0};
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56 gasEnvironment = envp;
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58 Command_Clear(0, NULL);
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61 char *tmp = getenv("CWD");
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63 gsCurrentDirectory = malloc(strlen(tmp)+1);
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64 strcpy(gsCurrentDirectory, tmp);
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66 gsCurrentDirectory = malloc(2);
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67 strcpy(gsCurrentDirectory, "/");
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71 write(_stdout, 22, "Acess Shell Version 3\n");
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72 write(_stdout, 2, "\n");
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75 // Free last command & arguments
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76 if(saArgs[0]) free(saArgs);
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77 if(!bCached) free(sCommandStr);
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80 write(_stdout, strlen(gsCurrentDirectory), gsCurrentDirectory);
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81 write(_stdout, 2, "$ ");
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83 // Read Command line
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84 sCommandStr = ReadCommandLine( &length );
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87 write(_stdout, 25, "PANIC: Out of heap space\n");
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91 // Check if the command should be cached
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92 if(gasCommandHistory == NULL || strcmp(sCommandStr, gasCommandHistory[giLastCommand]) != 0)
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94 if(giLastCommand >= giCommandSpace) {
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95 giCommandSpace += 12;
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96 gasCommandHistory = realloc(gasCommandHistory, giCommandSpace*sizeof(char*));
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99 gasCommandHistory[ giLastCommand ] = sCommandStr;
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103 // Parse Command Line into arguments
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104 Parse_Args(sCommandStr, saArgs);
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108 while(saArgs[iArgCount]) iArgCount++;
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110 // Silently Ignore all empty commands
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111 if(saArgs[1][0] == '\0') continue;
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113 // Check Built-In Commands
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114 for( i = 0; i < BUILTIN_COUNT; i++ )
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116 if( strcmp(saArgs[1], cBUILTINS[i].name) == 0 )
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118 cBUILTINS[i].fcn(iArgCount-1, &saArgs[1]);
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122 if(i != BUILTIN_COUNT) continue;
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125 CallCommand( &saArgs[1] );
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130 * \fn char *ReadCommandLine(int *Length)
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131 * \brief Read from the command line
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133 char *ReadCommandLine(int *Length)
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136 int len, pos, space = 1023;
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139 int scrollbackPos = giLastCommand;
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142 // Preset Variables
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143 ret = malloc( space+1 );
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144 if(!ret) return NULL;
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147 // Read In Command Line
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149 read(_stdin, 1, &ch); // Read Character from stdin (read is a blocking call)
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151 if(ch == '\n') break;
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155 // Control characters
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157 read(_stdin, 1, &ch); // Read control character
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160 //case 'D': if(pos) pos--; break;
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161 //case 'C': if(pos<len) pos++; break;
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163 read(_stdin, 1, &ch); // Read control character
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170 if( scrollbackPos > 0 ) break;
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173 ret = strdup( gasCommandHistory[--scrollbackPos] );
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176 while(pos--) write(_stdout, 3, "\x1B[D");
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177 write(_stdout, len, ret); pos = len;
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178 while(pos++ < oldLen) write(_stdout, 1, " ");
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184 if( scrollbackPos < giLastCommand-1 ) break;
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187 ret = strdup( gasCommandHistory[++scrollbackPos] );
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190 while(pos--) write(_stdout, 3, "\x1B[D");
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191 write(_stdout, len, ret); pos = len;
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192 while(pos++ < oldLen) write(_stdout, 1, " ");
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197 if(pos == 0) break;
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199 write(_stdout, 3, "\x1B[D");
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202 if(pos == len) break;
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204 write(_stdout, 3, "\x1B[C");
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212 if(len <= 0) break; // Protect against underflows
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213 write(_stdout, 1, &ch);
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214 if(pos == len) { // Simple case of end of string
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219 char buf[7] = "\x1B[000D";
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220 buf[2] += ((len-pos+1)/100) % 10;
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221 buf[3] += ((len-pos+1)/10) % 10;
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222 buf[4] += (len-pos+1) % 10;
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223 write(_stdout, len-pos, &ret[pos]); // Move Text
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224 ch = ' '; write(_stdout, 1, &ch); ch = '\b'; // Clear deleted character
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225 write(_stdout, 7, buf); // Update Cursor
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227 memmove(&ret[pos-1], &ret[pos], len-pos);
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235 //TODO: Implement Tab-Completion
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236 //Currently just ignore tabs
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241 if(len+1 > space) {
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243 ret = realloc(ret, space+1);
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244 if(!ret) return NULL;
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247 // Editing inside the buffer
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249 char buf[7] = "\x1B[000D";
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250 buf[2] += ((len-pos)/100) % 10;
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251 buf[3] += ((len-pos)/10) % 10;
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252 buf[4] += (len-pos) % 10;
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253 write(_stdout, 1, &ch); // Print new character
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254 write(_stdout, len-pos, &ret[pos]); // Move Text
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255 write(_stdout, 7, buf); // Update Cursor
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256 memmove( &ret[pos+1], &ret[pos], len-pos );
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259 write(_stdout, 1, &ch);
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265 } while(ch != '\n');
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272 if(Length) *Length = len;
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278 * \fn void Parse_Args(char *str, char **dest)
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279 * \brief Parse a string into an argument array
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281 void Parse_Args(char *str, char **dest)
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284 char *buf = malloc( strlen(str) + 1 );
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288 Print("Parse_Args: Out of heap space!\n");
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295 // Trim leading whitespace
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296 while(*buf == ' ' && *buf) buf++;
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300 dest[i] = buf; // Save start of string
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302 while(*buf && *buf != ' ')
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306 while(*buf && !(*buf == '"' && buf[-1] != '\\'))
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310 if(*buf == '\0') break;
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312 while(*++buf == ' ' && *buf);
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313 if(*buf == '\0') break;
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323 * \fn void CallCommand(char **Args)
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325 void CallCommand(char **Args)
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330 char sTmpBuffer[1024];
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331 char *exefile = Args[0];
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333 if(exefile[0] == '/'
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334 || (exefile[0] == '.' && exefile[1] == '/')
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335 || (exefile[0] == '.' && exefile[1] == '.' && exefile[2] == '/')
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338 GeneratePath(exefile, gsCurrentDirectory, sTmpBuffer);
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339 // Check file existence
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340 fd = open(sTmpBuffer, OPENFLAG_EXEC);
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342 Print("Unknown Command: `");Print(Args[0]);Print("'\n"); // Error Message
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346 // Get File info and close file
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347 finfo( fd, &info, 0 );
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350 // Check if the file is a directory
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351 if(info.flags & FILEFLAG_DIRECTORY) {
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352 Print("`");Print(sTmpBuffer); // Error Message
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353 Print("' is a directory.\n");
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361 // Check all components of $PATH
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362 for( i = 0; i < giNumPathDirs; i++ )
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364 GeneratePath(exefile, gasPathDirs[i], sTmpBuffer);
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365 fd = open(sTmpBuffer, OPENFLAG_EXEC);
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366 if(fd == -1) continue;
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367 finfo( fd, &info, 0 );
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369 if(info.flags & FILEFLAG_DIRECTORY) continue;
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370 // Woohoo! We found a valid command
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374 // Exhausted path directories
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375 if( i == giNumPathDirs ) {
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376 Print("Unknown Command: `");Print(exefile);Print("'\n");
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381 // Create new process
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382 pid = clone(CLONE_VM, 0);
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385 execve(sTmpBuffer, Args, gasEnvironment);
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387 Print("Unablt to create process: `");Print(sTmpBuffer);Print("'\n"); // Error Message
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391 waittid(pid, &status);
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396 * \fn void Command_Logout(int argc, char **argv)
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397 * \brief Exit the shell, logging the user out
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399 void Command_Logout(int argc, char **argv)
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405 * \fn void Command_Colour(int argc, char **argv)
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406 * \brief Displays the help screen
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408 void Command_Help(int argc, char **argv)
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410 Print("Acess 2 Command Line Interface\n");
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411 Print(" By John Hodge (thePowersGang / [TPG])\n");
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413 Print("Builtin Commands:\n");
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414 Print(" logout: Return to the login prompt\n");
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415 Print(" exit: Same\n");
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416 Print(" help: Display this message\n");
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417 Print(" clear: Clear the screen\n");
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418 Print(" cd: Change the current directory\n");
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419 Print(" dir: Print the contents of the current directory\n");
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425 * \fn void Command_Clear(int argc, char **argv)
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426 * \brief Clear the screen
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428 void Command_Clear(int argc, char **argv)
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430 write(_stdout, 4, "\x1B[2J"); //Clear Screen
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434 * \fn void Command_Cd(int argc, char **argv)
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435 * \brief Change directory
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437 void Command_Cd(int argc, char **argv)
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439 char tmpPath[1024];
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445 Print(gsCurrentDirectory);Print("\n");
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449 GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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451 fp = open(tmpPath, 0);
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453 write(_stdout, 26, "Directory does not exist\n");
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456 finfo(fp, &stats, 0);
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459 if( !(stats.flags & FILEFLAG_DIRECTORY) ) {
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460 write(_stdout, 17, "Not a Directory\n");
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464 free(gsCurrentDirectory);
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465 gsCurrentDirectory = malloc(strlen(tmpPath)+1);
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466 strcpy(gsCurrentDirectory, tmpPath);
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468 // Register change with kernel
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469 chdir( gsCurrentDirectory );
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473 * \fn void Command_Dir(int argc, char **argv)
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474 * \brief Print the contents of a directory
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476 void Command_Dir(int argc, char **argv)
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478 int dp, fp, dirLen;
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479 char modeStr[11] = "RWXrwxRWX ";
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480 char tmpPath[1024];
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485 // Generate Directory Path
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487 dirLen = GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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490 strcpy(tmpPath, gsCurrentDirectory);
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492 dirLen = strlen(tmpPath);
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495 dp = open(tmpPath, OPENFLAG_READ);
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496 // Check if file opened
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499 printf("Unable to open directory `%s', File cannot be found\n", tmpPath);
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503 if( finfo(dp, &info, 0) == -1 )
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506 write(_stdout, 34, "stat Failed, Bad File Descriptor\n");
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509 // Check if it's a directory
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510 if(!(info.flags & FILEFLAG_DIRECTORY))
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513 write(_stdout, 27, "Unable to open directory `");
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514 write(_stdout, strlen(tmpPath)+1, tmpPath);
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515 write(_stdout, 20, "', Not a directory\n");
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519 // Append Shash for file paths
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520 if(tmpPath[dirLen-1] != '/')
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522 tmpPath[dirLen++] = '/';
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523 tmpPath[dirLen] = '\0';
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526 fileName = (char*)(tmpPath+dirLen);
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527 // Read Directory Content
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528 while( (fp = readdir(dp, fileName)) )
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533 write(_stdout, 42, "Invalid Permissions to traverse directory\n");
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537 fp = open(tmpPath, 0);
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538 if(fp == -1) continue;
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540 finfo(fp, &info, 0);
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542 if(info.flags & FILEFLAG_DIRECTORY)
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543 write(_stdout, 1, "d");
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545 write(_stdout, 1, "-");
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549 acl.group = 0; acl.id = info.uid;
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550 _SysGetACL(fp, &acl);
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551 if(acl.perms & 1) modeStr[0] = 'r'; else modeStr[0] = '-';
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552 if(acl.perms & 2) modeStr[1] = 'w'; else modeStr[1] = '-';
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553 if(acl.perms & 8) modeStr[2] = 'x'; else modeStr[2] = '-';
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555 acl.group = 1; acl.id = info.gid;
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556 _SysGetACL(fp, &acl);
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557 if(acl.perms & 1) modeStr[3] = 'r'; else modeStr[3] = '-';
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558 if(acl.perms & 2) modeStr[4] = 'w'; else modeStr[4] = '-';
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559 if(acl.perms & 8) modeStr[5] = 'x'; else modeStr[5] = '-';
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561 acl.group = 1; acl.id = -1;
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562 _SysGetACL(fp, &acl);
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563 if(acl.perms & 1) modeStr[6] = 'r'; else modeStr[6] = '-';
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564 if(acl.perms & 2) modeStr[7] = 'w'; else modeStr[7] = '-';
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565 if(acl.perms & 8) modeStr[8] = 'x'; else modeStr[8] = '-';
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566 write(_stdout, 10, modeStr);
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570 if(info.flags & FILEFLAG_DIRECTORY) // Directory: Green
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571 write(_stdout, 6, "\x1B[32m");
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575 write(_stdout, strlen(fileName), fileName);
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577 // Print slash if applicable
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578 if(info.flags & FILEFLAG_DIRECTORY)
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579 write(_stdout, 1, "/");
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582 write(_stdout, 6, "\x1B[37m");
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585 write(_stdout, 1, "\n");
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