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 Command_Colour(int argc, char **argv);
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17 void Command_Clear(int argc, char **argv);
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18 void Command_Cd(int argc, char **argv);
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19 void Command_Dir(int argc, char **argv);
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21 // ==== CONSTANT GLOBALS ====
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22 char *cCOLOUR_NAMES[8] = {"black", "red", "green", "yellow", "blue", "magenta", "cyan", "white"};
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25 void (*fcn)(int argc, char **argv);
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27 {"colour", Command_Colour}, {"clear", Command_Clear},
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28 {"cd", Command_Cd}, {"dir", Command_Dir}
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30 #define BUILTIN_COUNT (sizeof(cBUILTINS)/sizeof(cBUILTINS[0]))
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32 // ==== LOCAL VARIABLES ====
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33 char gsCommandBuffer[1024];
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34 char *gsCurrentDirectory = NULL;
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35 char gsTmpBuffer[1024];
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36 char **gasCommandHistory;
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37 int giLastCommand = 0;
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38 int giCommandSpace = 0;
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41 int main(int argc, char *argv[], char *envp[])
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51 //Command_Clear(0, NULL);
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54 char *tmp = getenv("CWD");
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56 gsCurrentDirectory = malloc(strlen(tmp)+1);
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57 strcpy(gsCurrentDirectory, tmp);
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59 gsCurrentDirectory = malloc(2);
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60 strcpy(gsCurrentDirectory, "/");
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64 write(_stdout, 1, "\n");
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65 write(_stdout, 22, "Acess Shell Version 3\n");
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66 write(_stdout, 2, "\n");
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69 // Free last command & arguments
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70 if(saArgs[0]) free(saArgs);
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71 if(!bCached) free(sCommandStr);
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73 write(_stdout, 1, "\n");
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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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115 // - Calling a file
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116 GeneratePath(saArgs[1], gsCurrentDirectory, gsTmpBuffer);
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117 // Use length in place of fp
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118 length = open(gsTmpBuffer, 0);
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119 // Check file existence
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121 Print("Unknown Command: `");Print(saArgs[1]);Print("'\n"); // Error Message
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124 // Check if the file is a directory
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125 finfo( length, &info, 0 );
127 if(info.flags & FILEFLAG_DIRECTORY) {
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128 Print("`");Print(saArgs[1]); // Error Message
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129 Print("' is a directory.\n");
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132 // Load new executable
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133 pid = clone(CLONE_VM, 0);
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134 if(pid == 0) execve(gsTmpBuffer, &saArgs[1], envp);
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136 Print("Unablt to create process: `");Print(gsTmpBuffer);Print("'\n"); // Error Message
137 //SysDebug("pid = %i\n", pid);
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141 waittid(pid, &status);
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147 * \fn char *ReadCommandLine(int *Length)
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148 * \brief Read from the command line
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150 char *ReadCommandLine(int *Length)
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153 int len, pos, space = 1023;
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156 // Preset Variables
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157 ret = malloc( space+1 );
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161 // Read In Command Line
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163 read(_stdin, 1, &ch); // Read Character from stdin (read is a blocking call)
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164 // Ignore control characters
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165 if(ch < 0) continue;
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168 if(len <= 0) continue; // Protect against underflows
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169 if(pos == len) { // Simple case of end of string
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172 memmove(&ret[pos-1], &ret[pos], len-pos);
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176 write(_stdout, 1, &ch);
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182 ret = realloc(ret, space+1);
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183 if(!ret) return NULL;
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186 write(_stdout, 1, &ch);
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189 } while(ch != '\n');
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196 if(Length) *Length = len;
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202 * \fn void Parse_Args(char *str, char **dest)
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203 * \brief Parse a string into an argument array
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205 void Parse_Args(char *str, char **dest)
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208 char *buf = malloc( strlen(str) + 1 );
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213 // Trim leading whitespace
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214 while(*buf == ' ' && *buf) buf++;
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218 dest[i] = buf; // Save start of string
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220 while(*buf && *buf != ' ')
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224 while(*buf && !(*buf == '"' && buf[-1] != '\\'))
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228 if(*buf == '\0') break;
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230 while(*++buf == ' ' && *buf);
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231 if(*buf == '\0') break;
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241 * \fn void Command_Colour(int argc, char **argv)
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244 void Command_Colour(int argc, char **argv)
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247 char clrStr[6] = "\x1B[37m";
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249 // Verify Arg Count
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252 Print("Please specify a colour\n");
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257 for(fg=0;fg<8;fg++)
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258 if(strcmp(cCOLOUR_NAMES[fg], argv[1]) == 0)
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261 // Foreground a valid colour
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263 Print("Unknown Colour '");Print(argv[1]);Print("'\n");
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267 clrStr[3] = '0' + fg;
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268 write(_stdout, 6, clrStr);
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270 // Need to Set Background?
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273 for(bg=0;bg<8;bg++)
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274 if(strcmp(cCOLOUR_NAMES[bg], argv[2]) == 0)
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280 Print("Unknown Colour '");Print(argv[2]);Print("'\n");
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285 clrStr[3] = '0' + bg;
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286 write(_stdout, 6, clrStr);
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291 // Function Usage (Requested via a Goto (I know it's ugly))
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293 Print("Valid Colours are ");
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294 for(fg=0;fg<8;fg++)
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296 Print(cCOLOUR_NAMES[fg]);
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297 write(_stdout, 3, ", ");
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299 write(_stdout, 4, "\b\b\n");
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303 void Command_Clear(int argc, char **argv)
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305 write(_stdout, 4, "\x1B[2J"); //Clear Screen
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309 * \fn void Command_Cd(int argc, char **argv)
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310 * \brief Change directory
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312 void Command_Cd(int argc, char **argv)
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314 char tmpPath[1024];
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320 Print(gsCurrentDirectory);Print("\n");
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324 GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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326 fp = open(tmpPath, 0);
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328 write(_stdout, 26, "Directory does not exist\n");
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331 finfo(fp, &stats, 0);
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334 if( !(stats.flags & FILEFLAG_DIRECTORY) ) {
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335 write(_stdout, 17, "Not a Directory\n");
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339 free(gsCurrentDirectory);
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340 gsCurrentDirectory = malloc(strlen(tmpPath)+1);
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341 strcpy(gsCurrentDirectory, tmpPath);
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346 void Command_Dir(int argc, char **argv)
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348 int dp, fp, dirLen;
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349 char modeStr[11] = "RWXrwxRWX ";
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350 char tmpPath[1024];
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355 // Generate Directory Path
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357 dirLen = GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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360 strcpy(tmpPath, gsCurrentDirectory);
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362 dirLen = strlen(tmpPath);
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365 dp = open(tmpPath, OPENFLAG_READ);
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366 // Check if file opened
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369 //printf("Unable to open directory `%s', File cannot be found\n", tmpPath);
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370 write(_stdout, 27, "Unable to open directory `");
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371 write(_stdout, strlen(tmpPath)+1, tmpPath);
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372 write(_stdout, 25, "', File cannot be found\n");
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376 if( finfo(dp, &info, 0) == -1 )
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379 write(_stdout, 34, "stat Failed, Bad File Descriptor\n");
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382 // Check if it's a directory
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383 if(!(info.flags & FILEFLAG_DIRECTORY))
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386 write(_stdout, 27, "Unable to open directory `");
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387 write(_stdout, strlen(tmpPath)+1, tmpPath);
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388 write(_stdout, 20, "', Not a directory\n");
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392 // Append Shash for file paths
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393 if(tmpPath[dirLen-1] != '/')
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395 tmpPath[dirLen++] = '/';
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396 tmpPath[dirLen] = '\0';
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399 fileName = (char*)(tmpPath+dirLen);
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400 // Read Directory Content
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401 while( (fp = readdir(dp, fileName)) )
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406 write(_stdout, 42, "Invalid Permissions to traverse directory\n");
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410 fp = open(tmpPath, 0);
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411 if(fp == -1) continue;
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413 finfo(fp, &info, 0);
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415 if(info.flags & FILEFLAG_DIRECTORY)
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416 write(_stdout, 1, "d");
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418 write(_stdout, 1, "-");
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421 acl.group = 0; acl.id = info.uid;
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422 _SysGetACL(fp, &acl);
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423 if(acl.perms & 1) modeStr[0] = 'r'; else modeStr[0] = '-';
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424 if(acl.perms & 2) modeStr[1] = 'w'; else modeStr[1] = '-';
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425 if(acl.perms & 8) modeStr[2] = 'x'; else modeStr[2] = '-';
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426 acl.group = 1; acl.id = info.gid;
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427 _SysGetACL(fp, &acl);
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428 if(acl.perms & 1) modeStr[3] = 'r'; else modeStr[3] = '-';
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429 if(acl.perms & 1) modeStr[4] = 'w'; else modeStr[4] = '-';
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430 if(acl.perms & 1) modeStr[5] = 'x'; else modeStr[5] = '-';
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431 acl.group = 1; acl.id = -1;
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432 _SysGetACL(fp, &acl);
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433 if(acl.perms & 1) modeStr[6] = 'r'; else modeStr[6] = '-';
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434 if(acl.perms & 1) modeStr[7] = 'w'; else modeStr[7] = '-';
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435 if(acl.perms & 1) modeStr[8] = 'x'; else modeStr[8] = '-';
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436 write(_stdout, 10, modeStr);
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440 if(info.flags & FILEFLAG_DIRECTORY) // Directory: Green
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441 write(_stdout, 6, "\x1B[32m");
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445 write(_stdout, strlen(fileName), fileName);
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447 // Print slash if applicable
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448 if(info.flags & FILEFLAG_DIRECTORY)
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449 write(_stdout, 1, "/");
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452 write(_stdout, 6, "\x1B[37m");
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455 write(_stdout, 1, "\n");
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