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, strlen(gsCurrentDirectory), gsCurrentDirectory);
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74 write(_stdout, 3, "$ ");
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76 // Read Command line
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77 sCommandStr = ReadCommandLine( &length );
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79 // Check if the command should be cached
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80 if(gasCommandHistory == NULL || strcmp(sCommandStr, gasCommandHistory[giLastCommand]) != 0)
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82 if(giLastCommand >= giCommandSpace) {
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83 giCommandSpace += 12;
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84 gasCommandHistory = realloc(gasCommandHistory, giCommandSpace*sizeof(char*));
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87 gasCommandHistory[ giLastCommand ] = sCommandStr;
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91 // Parse Command Line into arguments
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92 Parse_Args(sCommandStr, saArgs);
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96 while(saArgs[iArgCount]) iArgCount++;
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98 // Silently Ignore all empty commands
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99 if(saArgs[1][0] == '\0') continue;
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101 // Check Built-In Commands
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102 // [HACK] Mem Usage - Use Length in place of `i'
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103 for(length=0;length<BUILTIN_COUNT;length++)
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105 if(strcmp(saArgs[1], cBUILTINS[length].name) == 0)
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107 cBUILTINS[length].fcn(iArgCount-1, &saArgs[1]);
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112 if(length != BUILTIN_COUNT) continue;
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114 // - Calling a file
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115 GeneratePath(saArgs[1], gsCurrentDirectory, gsTmpBuffer);
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116 // Use length in place of fp
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117 length = open(gsTmpBuffer, 0);
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118 // Check file existence
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120 Print("Unknown Command: `");Print(saArgs[1]);Print("'\n"); // Error Message
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123 // Check if the file is a directory
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124 finfo( length, &info, 0 );
126 if(info.flags & FILEFLAG_DIRECTORY) {
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127 Print("`");Print(saArgs[1]); // Error Message
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128 Print("' is a directory.\n");
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131 // Load new executable
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132 pid = clone(CLONE_VM, 0);
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133 printf("pid = %i\n", pid);
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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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158 if(!ret) return NULL;
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162 // Read In Command Line
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164 read(_stdin, 1, &ch); // Read Character from stdin (read is a blocking call)
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165 // Ignore control characters
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167 read(_stdin, 1, &ch); // Read control character
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170 case 'D': if(pos) pos--; break;
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171 case 'C': if(pos<len) pos++; break;
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173 read(_stdin, 1, &ch); // Read control character
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176 case 'D': if(pos) pos--; break;
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177 case 'C': if(pos<len) pos++; break;
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184 if(len <= 0) continue; // Protect against underflows
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185 if(pos == len) { // Simple case of end of string
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188 memmove(&ret[pos-1], &ret[pos], len-pos);
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192 write(_stdout, 1, &ch);
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198 ret = realloc(ret, space+1);
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199 if(!ret) return NULL;
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202 write(_stdout, 1, &ch);
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205 } while(ch != '\n');
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212 if(Length) *Length = len;
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218 * \fn void Parse_Args(char *str, char **dest)
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219 * \brief Parse a string into an argument array
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221 void Parse_Args(char *str, char **dest)
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224 char *buf = malloc( strlen(str) + 1 );
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229 // Trim leading whitespace
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230 while(*buf == ' ' && *buf) buf++;
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234 dest[i] = buf; // Save start of string
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236 while(*buf && *buf != ' ')
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240 while(*buf && !(*buf == '"' && buf[-1] != '\\'))
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244 if(*buf == '\0') break;
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246 while(*++buf == ' ' && *buf);
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247 if(*buf == '\0') break;
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257 * \fn void Command_Colour(int argc, char **argv)
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260 void Command_Colour(int argc, char **argv)
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263 char clrStr[6] = "\x1B[37m";
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265 // Verify Arg Count
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268 Print("Please specify a colour\n");
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273 for(fg=0;fg<8;fg++)
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274 if(strcmp(cCOLOUR_NAMES[fg], argv[1]) == 0)
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277 // Foreground a valid colour
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279 Print("Unknown Colour '");Print(argv[1]);Print("'\n");
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283 clrStr[3] = '0' + fg;
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284 write(_stdout, 6, clrStr);
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286 // Need to Set Background?
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289 for(bg=0;bg<8;bg++)
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290 if(strcmp(cCOLOUR_NAMES[bg], argv[2]) == 0)
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296 Print("Unknown Colour '");Print(argv[2]);Print("'\n");
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301 clrStr[3] = '0' + bg;
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302 write(_stdout, 6, clrStr);
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307 // Function Usage (Requested via a Goto (I know it's ugly))
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309 Print("Valid Colours are ");
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310 for(fg=0;fg<8;fg++)
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312 Print(cCOLOUR_NAMES[fg]);
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313 write(_stdout, 3, ", ");
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315 write(_stdout, 4, "\b\b\n");
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319 void Command_Clear(int argc, char **argv)
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321 write(_stdout, 4, "\x1B[2J"); //Clear Screen
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325 * \fn void Command_Cd(int argc, char **argv)
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326 * \brief Change directory
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328 void Command_Cd(int argc, char **argv)
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330 char tmpPath[1024];
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336 Print(gsCurrentDirectory);Print("\n");
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340 GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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342 fp = open(tmpPath, 0);
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344 write(_stdout, 26, "Directory does not exist\n");
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347 finfo(fp, &stats, 0);
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350 if( !(stats.flags & FILEFLAG_DIRECTORY) ) {
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351 write(_stdout, 17, "Not a Directory\n");
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355 free(gsCurrentDirectory);
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356 gsCurrentDirectory = malloc(strlen(tmpPath)+1);
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357 strcpy(gsCurrentDirectory, tmpPath);
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359 // Register change with kernel
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360 chdir( gsCurrentDirectory );
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365 void Command_Dir(int argc, char **argv)
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367 int dp, fp, dirLen;
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368 char modeStr[11] = "RWXrwxRWX ";
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369 char tmpPath[1024];
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374 // Generate Directory Path
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376 dirLen = GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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379 strcpy(tmpPath, gsCurrentDirectory);
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381 dirLen = strlen(tmpPath);
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384 dp = open(tmpPath, OPENFLAG_READ);
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385 // Check if file opened
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388 //printf("Unable to open directory `%s', File cannot be found\n", tmpPath);
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389 write(_stdout, 27, "Unable to open directory `");
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390 write(_stdout, strlen(tmpPath)+1, tmpPath);
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391 write(_stdout, 25, "', File cannot be found\n");
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395 if( finfo(dp, &info, 0) == -1 )
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398 write(_stdout, 34, "stat Failed, Bad File Descriptor\n");
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401 // Check if it's a directory
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402 if(!(info.flags & FILEFLAG_DIRECTORY))
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405 write(_stdout, 27, "Unable to open directory `");
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406 write(_stdout, strlen(tmpPath)+1, tmpPath);
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407 write(_stdout, 20, "', Not a directory\n");
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411 // Append Shash for file paths
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412 if(tmpPath[dirLen-1] != '/')
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414 tmpPath[dirLen++] = '/';
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415 tmpPath[dirLen] = '\0';
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418 fileName = (char*)(tmpPath+dirLen);
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419 // Read Directory Content
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420 while( (fp = readdir(dp, fileName)) )
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425 write(_stdout, 42, "Invalid Permissions to traverse directory\n");
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429 fp = open(tmpPath, 0);
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430 if(fp == -1) continue;
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432 finfo(fp, &info, 0);
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434 if(info.flags & FILEFLAG_DIRECTORY)
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435 write(_stdout, 1, "d");
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437 write(_stdout, 1, "-");
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440 acl.group = 0; acl.id = info.uid;
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441 _SysGetACL(fp, &acl);
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442 if(acl.perms & 1) modeStr[0] = 'r'; else modeStr[0] = '-';
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443 if(acl.perms & 2) modeStr[1] = 'w'; else modeStr[1] = '-';
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444 if(acl.perms & 8) modeStr[2] = 'x'; else modeStr[2] = '-';
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445 acl.group = 1; acl.id = info.gid;
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446 _SysGetACL(fp, &acl);
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447 if(acl.perms & 1) modeStr[3] = 'r'; else modeStr[3] = '-';
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448 if(acl.perms & 1) modeStr[4] = 'w'; else modeStr[4] = '-';
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449 if(acl.perms & 1) modeStr[5] = 'x'; else modeStr[5] = '-';
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450 acl.group = 1; acl.id = -1;
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451 _SysGetACL(fp, &acl);
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452 if(acl.perms & 1) modeStr[6] = 'r'; else modeStr[6] = '-';
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453 if(acl.perms & 1) modeStr[7] = 'w'; else modeStr[7] = '-';
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454 if(acl.perms & 1) modeStr[8] = 'x'; else modeStr[8] = '-';
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455 write(_stdout, 10, modeStr);
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459 if(info.flags & FILEFLAG_DIRECTORY) // Directory: Green
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460 write(_stdout, 6, "\x1B[32m");
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464 write(_stdout, strlen(fileName), fileName);
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466 // Print slash if applicable
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467 if(info.flags & FILEFLAG_DIRECTORY)
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468 write(_stdout, 1, "/");
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471 write(_stdout, 6, "\x1B[37m");
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474 write(_stdout, 1, "\n");
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