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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81 write(_stdout, 25, "PANIC: Out of heap space\n");
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85 // Check if the command should be cached
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86 if(gasCommandHistory == NULL || strcmp(sCommandStr, gasCommandHistory[giLastCommand]) != 0)
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88 if(giLastCommand >= giCommandSpace) {
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89 giCommandSpace += 12;
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90 gasCommandHistory = realloc(gasCommandHistory, giCommandSpace*sizeof(char*));
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93 gasCommandHistory[ giLastCommand ] = sCommandStr;
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97 // Parse Command Line into arguments
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98 Parse_Args(sCommandStr, saArgs);
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102 while(saArgs[iArgCount]) iArgCount++;
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104 // Silently Ignore all empty commands
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105 if(saArgs[1][0] == '\0') continue;
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107 // Check Built-In Commands
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108 // [HACK] Mem Usage - Use Length in place of `i'
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109 for(length=0;length<BUILTIN_COUNT;length++)
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111 if(strcmp(saArgs[1], cBUILTINS[length].name) == 0)
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113 cBUILTINS[length].fcn(iArgCount-1, &saArgs[1]);
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118 if(length != BUILTIN_COUNT) continue;
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121 CallCommand( &saArgs[1] );
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126 * \fn char *ReadCommandLine(int *Length)
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127 * \brief Read from the command line
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129 char *ReadCommandLine(int *Length)
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132 int len, pos, space = 1023;
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135 // Preset Variables
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136 ret = malloc( space+1 );
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137 if(!ret) return NULL;
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141 // Read In Command Line
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143 read(_stdin, 1, &ch); // Read Character from stdin (read is a blocking call)
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144 // Ignore control characters
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146 read(_stdin, 1, &ch); // Read control character
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149 case 'D': if(pos) pos--; break;
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150 case 'C': if(pos<len) pos++; break;
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152 read(_stdin, 1, &ch); // Read control character
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155 case 'D': if(pos) pos--; break;
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156 case 'C': if(pos<len) pos++; break;
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163 if(len <= 0) continue; // Protect against underflows
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164 if(pos == len) { // Simple case of end of string
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167 memmove(&ret[pos-1], &ret[pos], len-pos);
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171 write(_stdout, 1, &ch);
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177 ret = realloc(ret, space+1);
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178 if(!ret) return NULL;
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181 write(_stdout, 1, &ch);
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184 } while(ch != '\n');
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191 if(Length) *Length = len;
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197 * \fn void Parse_Args(char *str, char **dest)
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198 * \brief Parse a string into an argument array
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200 void Parse_Args(char *str, char **dest)
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203 char *buf = malloc( strlen(str) + 1 );
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207 Print("Parse_Args: Out of heap space!\n");
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214 // Trim leading whitespace
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215 while(*buf == ' ' && *buf) buf++;
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219 dest[i] = buf; // Save start of string
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221 while(*buf && *buf != ' ')
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225 while(*buf && !(*buf == '"' && buf[-1] != '\\'))
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229 if(*buf == '\0') break;
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231 while(*++buf == ' ' && *buf);
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232 if(*buf == '\0') break;
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242 * \fn void CallCommand(char **Args)
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244 void CallCommand(char **Args)
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251 // - Calling a file
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252 GeneratePath(Args[0], gsCurrentDirectory, gsTmpBuffer);
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255 // Check file existence
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256 fd = open(gsTmpBuffer, 0);
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258 Print("Unknown Command: `");Print(Args[0]);Print("'\n"); // Error Message
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262 // Check if the file is a directory
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263 finfo( fd, &info, 0 );
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265 if(info.flags & FILEFLAG_DIRECTORY) {
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266 Print("`");Print(gsTmpBuffer); // Error Message
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267 Print("' is a directory.\n");
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271 // Create new process
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272 pid = clone(CLONE_VM, 0);
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275 execve(gsTmpBuffer, Args, gasEnvironment);
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277 Print("Unablt to create process: `");Print(gsTmpBuffer);Print("'\n"); // Error Message
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281 waittid(pid, &status);
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286 * \fn void Command_Colour(int argc, char **argv)
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289 void Command_Colour(int argc, char **argv)
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292 char clrStr[6] = "\x1B[37m";
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294 // Verify Arg Count
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297 Print("Please specify a colour\n");
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302 for(fg=0;fg<8;fg++)
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303 if(strcmp(cCOLOUR_NAMES[fg], argv[1]) == 0)
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306 // Foreground a valid colour
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308 Print("Unknown Colour '");Print(argv[1]);Print("'\n");
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312 clrStr[3] = '0' + fg;
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313 write(_stdout, 6, clrStr);
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315 // Need to Set Background?
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318 for(bg=0;bg<8;bg++)
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319 if(strcmp(cCOLOUR_NAMES[bg], argv[2]) == 0)
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325 Print("Unknown Colour '");Print(argv[2]);Print("'\n");
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330 clrStr[3] = '0' + bg;
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331 write(_stdout, 6, clrStr);
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336 // Function Usage (Requested via a Goto (I know it's ugly))
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338 Print("Valid Colours are ");
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339 for(fg=0;fg<8;fg++)
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341 Print(cCOLOUR_NAMES[fg]);
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342 write(_stdout, 3, ", ");
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344 write(_stdout, 4, "\b\b\n");
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348 void Command_Clear(int argc, char **argv)
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350 write(_stdout, 4, "\x1B[2J"); //Clear Screen
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354 * \fn void Command_Cd(int argc, char **argv)
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355 * \brief Change directory
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357 void Command_Cd(int argc, char **argv)
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359 char tmpPath[1024];
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365 Print(gsCurrentDirectory);Print("\n");
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369 GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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371 fp = open(tmpPath, 0);
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373 write(_stdout, 26, "Directory does not exist\n");
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376 finfo(fp, &stats, 0);
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379 if( !(stats.flags & FILEFLAG_DIRECTORY) ) {
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380 write(_stdout, 17, "Not a Directory\n");
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384 free(gsCurrentDirectory);
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385 gsCurrentDirectory = malloc(strlen(tmpPath)+1);
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386 strcpy(gsCurrentDirectory, tmpPath);
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388 // Register change with kernel
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389 chdir( gsCurrentDirectory );
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394 void Command_Dir(int argc, char **argv)
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396 int dp, fp, dirLen;
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397 char modeStr[11] = "RWXrwxRWX ";
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398 char tmpPath[1024];
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403 // Generate Directory Path
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405 dirLen = GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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408 strcpy(tmpPath, gsCurrentDirectory);
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410 dirLen = strlen(tmpPath);
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413 dp = open(tmpPath, OPENFLAG_READ);
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414 // Check if file opened
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417 //printf("Unable to open directory `%s', File cannot be found\n", tmpPath);
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418 write(_stdout, 27, "Unable to open directory `");
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419 write(_stdout, strlen(tmpPath)+1, tmpPath);
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420 write(_stdout, 25, "', File cannot be found\n");
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424 if( finfo(dp, &info, 0) == -1 )
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427 write(_stdout, 34, "stat Failed, Bad File Descriptor\n");
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430 // Check if it's a directory
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431 if(!(info.flags & FILEFLAG_DIRECTORY))
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434 write(_stdout, 27, "Unable to open directory `");
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435 write(_stdout, strlen(tmpPath)+1, tmpPath);
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436 write(_stdout, 20, "', Not a directory\n");
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440 // Append Shash for file paths
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441 if(tmpPath[dirLen-1] != '/')
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443 tmpPath[dirLen++] = '/';
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444 tmpPath[dirLen] = '\0';
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447 fileName = (char*)(tmpPath+dirLen);
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448 // Read Directory Content
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449 while( (fp = readdir(dp, fileName)) )
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454 write(_stdout, 42, "Invalid Permissions to traverse directory\n");
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458 fp = open(tmpPath, 0);
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459 if(fp == -1) continue;
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461 finfo(fp, &info, 0);
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463 if(info.flags & FILEFLAG_DIRECTORY)
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464 write(_stdout, 1, "d");
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466 write(_stdout, 1, "-");
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469 acl.group = 0; acl.id = info.uid;
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470 _SysGetACL(fp, &acl);
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471 if(acl.perms & 1) modeStr[0] = 'r'; else modeStr[0] = '-';
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472 if(acl.perms & 2) modeStr[1] = 'w'; else modeStr[1] = '-';
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473 if(acl.perms & 8) modeStr[2] = 'x'; else modeStr[2] = '-';
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474 acl.group = 1; acl.id = info.gid;
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475 _SysGetACL(fp, &acl);
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476 if(acl.perms & 1) modeStr[3] = 'r'; else modeStr[3] = '-';
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477 if(acl.perms & 1) modeStr[4] = 'w'; else modeStr[4] = '-';
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478 if(acl.perms & 1) modeStr[5] = 'x'; else modeStr[5] = '-';
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479 acl.group = 1; acl.id = -1;
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480 _SysGetACL(fp, &acl);
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481 if(acl.perms & 1) modeStr[6] = 'r'; else modeStr[6] = '-';
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482 if(acl.perms & 1) modeStr[7] = 'w'; else modeStr[7] = '-';
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483 if(acl.perms & 1) modeStr[8] = 'x'; else modeStr[8] = '-';
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484 write(_stdout, 10, modeStr);
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488 if(info.flags & FILEFLAG_DIRECTORY) // Directory: Green
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489 write(_stdout, 6, "\x1B[32m");
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493 write(_stdout, strlen(fileName), fileName);
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495 // Print slash if applicable
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496 if(info.flags & FILEFLAG_DIRECTORY)
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497 write(_stdout, 1, "/");
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500 write(_stdout, 6, "\x1B[37m");
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503 write(_stdout, 1, "\n");
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