2 * AcessOS Shell Version 3
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4 #include <acess/sys.h>
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13 // ==== PROTOTYPES ====
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14 char *ReadCommandLine(int *Length);
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15 void Parse_Args(char *str, char **dest);
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16 void CallCommand(char **Args);
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17 void Command_Colour(int argc, char **argv);
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18 void Command_Clear(int argc, char **argv);
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19 void Command_Cd(int argc, char **argv);
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20 void Command_Dir(int argc, char **argv);
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22 // ==== CONSTANT GLOBALS ====
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23 char *cCOLOUR_NAMES[8] = {"black", "red", "green", "yellow", "blue", "magenta", "cyan", "white"};
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26 void (*fcn)(int argc, char **argv);
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28 {"colour", Command_Colour}, {"clear", Command_Clear},
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29 {"cd", Command_Cd}, {"dir", Command_Dir}
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31 #define BUILTIN_COUNT (sizeof(cBUILTINS)/sizeof(cBUILTINS[0]))
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33 // ==== LOCAL VARIABLES ====
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34 char **gasEnvironment;
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35 char gsCommandBuffer[1024];
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36 char *gsCurrentDirectory = NULL;
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37 char gsTmpBuffer[1024];
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38 char **gasCommandHistory;
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39 int giLastCommand = 0;
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40 int giCommandSpace = 0;
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43 int main(int argc, char *argv[], char *envp[])
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51 gasEnvironment = envp;
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53 Command_Clear(0, NULL);
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56 char *tmp = getenv("CWD");
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58 gsCurrentDirectory = malloc(strlen(tmp)+1);
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59 strcpy(gsCurrentDirectory, tmp);
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61 gsCurrentDirectory = malloc(2);
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62 strcpy(gsCurrentDirectory, "/");
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66 write(_stdout, 22, "Acess Shell Version 3\n");
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67 write(_stdout, 2, "\n");
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70 // Free last command & arguments
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71 if(saArgs[0]) free(saArgs);
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72 if(!bCached) free(sCommandStr);
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74 write(_stdout, strlen(gsCurrentDirectory), gsCurrentDirectory);
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75 write(_stdout, 3, "$ ");
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77 // Read Command line
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78 sCommandStr = ReadCommandLine( &length );
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80 // Check if the command should be cached
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81 if(gasCommandHistory == NULL || strcmp(sCommandStr, gasCommandHistory[giLastCommand]) != 0)
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83 if(giLastCommand >= giCommandSpace) {
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84 giCommandSpace += 12;
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85 gasCommandHistory = realloc(gasCommandHistory, giCommandSpace*sizeof(char*));
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88 gasCommandHistory[ giLastCommand ] = sCommandStr;
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92 // Parse Command Line into arguments
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93 Parse_Args(sCommandStr, saArgs);
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97 while(saArgs[iArgCount]) iArgCount++;
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99 // Silently Ignore all empty commands
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100 if(saArgs[1][0] == '\0') continue;
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102 // Check Built-In Commands
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103 // [HACK] Mem Usage - Use Length in place of `i'
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104 for(length=0;length<BUILTIN_COUNT;length++)
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106 if(strcmp(saArgs[1], cBUILTINS[length].name) == 0)
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108 cBUILTINS[length].fcn(iArgCount-1, &saArgs[1]);
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113 if(length != BUILTIN_COUNT) continue;
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116 CallCommand( &saArgs[1] );
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121 * \fn char *ReadCommandLine(int *Length)
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122 * \brief Read from the command line
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124 char *ReadCommandLine(int *Length)
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127 int len, pos, space = 1023;
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130 // Preset Variables
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131 ret = malloc( space+1 );
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132 if(!ret) return NULL;
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136 // Read In Command Line
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138 read(_stdin, 1, &ch); // Read Character from stdin (read is a blocking call)
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139 // Ignore control characters
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141 read(_stdin, 1, &ch); // Read control character
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144 case 'D': if(pos) pos--; break;
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145 case 'C': if(pos<len) pos++; break;
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147 read(_stdin, 1, &ch); // Read control character
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150 case 'D': if(pos) pos--; break;
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151 case 'C': if(pos<len) pos++; break;
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158 if(len <= 0) continue; // Protect against underflows
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159 if(pos == len) { // Simple case of end of string
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162 memmove(&ret[pos-1], &ret[pos], len-pos);
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166 write(_stdout, 1, &ch);
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172 ret = realloc(ret, space+1);
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173 if(!ret) return NULL;
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176 write(_stdout, 1, &ch);
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179 } while(ch != '\n');
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186 if(Length) *Length = len;
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192 * \fn void Parse_Args(char *str, char **dest)
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193 * \brief Parse a string into an argument array
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195 void Parse_Args(char *str, char **dest)
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198 char *buf = malloc( strlen(str) + 1 );
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203 // Trim leading whitespace
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204 while(*buf == ' ' && *buf) buf++;
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208 dest[i] = buf; // Save start of string
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210 while(*buf && *buf != ' ')
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214 while(*buf && !(*buf == '"' && buf[-1] != '\\'))
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218 if(*buf == '\0') break;
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220 while(*++buf == ' ' && *buf);
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221 if(*buf == '\0') break;
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231 * \fn void CallCommand(char **Args)
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233 void CallCommand(char **Args)
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240 // - Calling a file
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241 GeneratePath(Args[0], gsCurrentDirectory, gsTmpBuffer);
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244 // Check file existence
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245 fd = open(gsTmpBuffer, 0);
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247 Print("Unknown Command: `");Print(Args[0]);Print("'\n"); // Error Message
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251 // Check if the file is a directory
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252 finfo( fd, &info, 0 );
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254 if(info.flags & FILEFLAG_DIRECTORY) {
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255 Print("`");Print(gsTmpBuffer); // Error Message
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256 Print("' is a directory.\n");
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260 // Create new process
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261 pid = clone(CLONE_VM, 0);
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264 execve(gsTmpBuffer, Args, gasEnvironment);
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266 Print("Unablt to create process: `");Print(gsTmpBuffer);Print("'\n"); // Error Message
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270 waittid(pid, &status);
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275 * \fn void Command_Colour(int argc, char **argv)
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278 void Command_Colour(int argc, char **argv)
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281 char clrStr[6] = "\x1B[37m";
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283 // Verify Arg Count
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286 Print("Please specify a colour\n");
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291 for(fg=0;fg<8;fg++)
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292 if(strcmp(cCOLOUR_NAMES[fg], argv[1]) == 0)
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295 // Foreground a valid colour
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297 Print("Unknown Colour '");Print(argv[1]);Print("'\n");
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301 clrStr[3] = '0' + fg;
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302 write(_stdout, 6, clrStr);
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304 // Need to Set Background?
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307 for(bg=0;bg<8;bg++)
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308 if(strcmp(cCOLOUR_NAMES[bg], argv[2]) == 0)
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314 Print("Unknown Colour '");Print(argv[2]);Print("'\n");
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319 clrStr[3] = '0' + bg;
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320 write(_stdout, 6, clrStr);
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325 // Function Usage (Requested via a Goto (I know it's ugly))
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327 Print("Valid Colours are ");
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328 for(fg=0;fg<8;fg++)
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330 Print(cCOLOUR_NAMES[fg]);
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331 write(_stdout, 3, ", ");
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333 write(_stdout, 4, "\b\b\n");
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337 void Command_Clear(int argc, char **argv)
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339 write(_stdout, 4, "\x1B[2J"); //Clear Screen
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343 * \fn void Command_Cd(int argc, char **argv)
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344 * \brief Change directory
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346 void Command_Cd(int argc, char **argv)
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348 char tmpPath[1024];
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354 Print(gsCurrentDirectory);Print("\n");
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358 GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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360 fp = open(tmpPath, 0);
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362 write(_stdout, 26, "Directory does not exist\n");
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365 finfo(fp, &stats, 0);
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368 if( !(stats.flags & FILEFLAG_DIRECTORY) ) {
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369 write(_stdout, 17, "Not a Directory\n");
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373 free(gsCurrentDirectory);
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374 gsCurrentDirectory = malloc(strlen(tmpPath)+1);
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375 strcpy(gsCurrentDirectory, tmpPath);
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377 // Register change with kernel
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378 chdir( gsCurrentDirectory );
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383 void Command_Dir(int argc, char **argv)
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385 int dp, fp, dirLen;
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386 char modeStr[11] = "RWXrwxRWX ";
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387 char tmpPath[1024];
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392 // Generate Directory Path
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394 dirLen = GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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397 strcpy(tmpPath, gsCurrentDirectory);
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399 dirLen = strlen(tmpPath);
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402 dp = open(tmpPath, OPENFLAG_READ);
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403 // Check if file opened
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406 //printf("Unable to open directory `%s', File cannot be found\n", tmpPath);
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407 write(_stdout, 27, "Unable to open directory `");
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408 write(_stdout, strlen(tmpPath)+1, tmpPath);
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409 write(_stdout, 25, "', File cannot be found\n");
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413 if( finfo(dp, &info, 0) == -1 )
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416 write(_stdout, 34, "stat Failed, Bad File Descriptor\n");
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419 // Check if it's a directory
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420 if(!(info.flags & FILEFLAG_DIRECTORY))
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423 write(_stdout, 27, "Unable to open directory `");
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424 write(_stdout, strlen(tmpPath)+1, tmpPath);
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425 write(_stdout, 20, "', Not a directory\n");
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429 // Append Shash for file paths
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430 if(tmpPath[dirLen-1] != '/')
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432 tmpPath[dirLen++] = '/';
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433 tmpPath[dirLen] = '\0';
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436 fileName = (char*)(tmpPath+dirLen);
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437 // Read Directory Content
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438 while( (fp = readdir(dp, fileName)) )
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443 write(_stdout, 42, "Invalid Permissions to traverse directory\n");
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447 fp = open(tmpPath, 0);
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448 if(fp == -1) continue;
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450 finfo(fp, &info, 0);
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452 if(info.flags & FILEFLAG_DIRECTORY)
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453 write(_stdout, 1, "d");
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455 write(_stdout, 1, "-");
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458 acl.group = 0; acl.id = info.uid;
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459 _SysGetACL(fp, &acl);
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460 if(acl.perms & 1) modeStr[0] = 'r'; else modeStr[0] = '-';
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461 if(acl.perms & 2) modeStr[1] = 'w'; else modeStr[1] = '-';
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462 if(acl.perms & 8) modeStr[2] = 'x'; else modeStr[2] = '-';
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463 acl.group = 1; acl.id = info.gid;
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464 _SysGetACL(fp, &acl);
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465 if(acl.perms & 1) modeStr[3] = 'r'; else modeStr[3] = '-';
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466 if(acl.perms & 1) modeStr[4] = 'w'; else modeStr[4] = '-';
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467 if(acl.perms & 1) modeStr[5] = 'x'; else modeStr[5] = '-';
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468 acl.group = 1; acl.id = -1;
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469 _SysGetACL(fp, &acl);
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470 if(acl.perms & 1) modeStr[6] = 'r'; else modeStr[6] = '-';
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471 if(acl.perms & 1) modeStr[7] = 'w'; else modeStr[7] = '-';
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472 if(acl.perms & 1) modeStr[8] = 'x'; else modeStr[8] = '-';
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473 write(_stdout, 10, modeStr);
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477 if(info.flags & FILEFLAG_DIRECTORY) // Directory: Green
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478 write(_stdout, 6, "\x1B[32m");
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482 write(_stdout, strlen(fileName), fileName);
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484 // Print slash if applicable
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485 if(info.flags & FILEFLAG_DIRECTORY)
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486 write(_stdout, 1, "/");
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489 write(_stdout, 6, "\x1B[37m");
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492 write(_stdout, 1, "\n");
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