2 AcessOS Shell Version 2
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3 - Based on IOOS CLI Shell
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5 #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_Ls(int argc, char **argv);
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19 void Command_Cd(int argc, char **argv);
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20 //void Command_Cat(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}, {"cd", Command_Cd}
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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 = "/";
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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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53 write(_stdout, 36, "AcessOS/AcessBasic Shell Version 2\n");
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54 write(_stdout, 30, " Based on CLI Shell for IOOS\n");
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55 write(_stdout, 2, "\n");
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58 // Free last command & arguments
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59 if(saArgs[0]) free(saArgs);
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60 if(!bCached) free(sCommandStr);
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62 write(_stdout, strlen(gsCurrentDirectory), gsCurrentDirectory);
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63 write(_stdout, 3, "$ ");
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65 // Read Command line
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66 sCommandStr = ReadCommandLine( &length );
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68 // Check if the command should be cached
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69 if(gasCommandHistory == NULL || strcmp(sCommandStr, gasCommandHistory[giLastCommand]) != 0)
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71 if(giLastCommand >= giCommandSpace) {
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72 giCommandSpace += 12;
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73 gasCommandHistory = realloc(gasCommandHistory, giCommandSpace*sizeof(char*));
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76 gasCommandHistory[ giLastCommand ] = sCommandStr;
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80 // Parse Command Line into arguments
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81 Parse_Args(sCommandStr, saArgs);
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85 while(saArgs[iArgCount]) iArgCount++;
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87 // Silently Ignore all empty commands
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88 if(saArgs[1][0] == '\0') continue;
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90 // Check Built-In Commands
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91 // [HACK] Mem Usage - Use Length in place of `i'
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92 for(length=0;length<BUILTIN_COUNT;length++)
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94 if(strcmp(saArgs[1], cBUILTINS[length].name) == 0)
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96 cBUILTINS[length].fcn(iArgCount-1, &saArgs[1]);
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101 if(length == BUILTIN_COUNT)
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103 GeneratePath(saArgs[1], gsCurrentDirectory, gsTmpBuffer);
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104 // Use length in place of fp
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105 length = open(gsTmpBuffer, 0);
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106 // Check file existence
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108 Print("Unknown Command: `");Print(saArgs[1]);Print("'\n"); // Error Message
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111 // Check if the file is a directory
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112 finfo( length, &info );
114 if(info.flags & FILEFLAG_DIRECTORY) {
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115 Print("`");Print(saArgs[1]); // Error Message
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116 Print("' is a directory.\n");
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119 pid = clone(CLONE_VM, 0);
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120 if(pid == 0) execve(gsTmpBuffer, &saArgs[1], NULL);
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122 Print("Unablt to create process: `");Print(gsTmpBuffer);Print("'\n"); // Error Message
123 //SysDebug("pid = %i\n", pid);
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126 //waitpid(pid, K_WAITPID_DIE);
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133 * \fn char *ReadCommandLine(int *Length)
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134 * \brief Read from the command line
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136 char *ReadCommandLine(int *Length)
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139 int len, pos, space = 1023;
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142 // Preset Variables
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143 ret = malloc( space+1 );
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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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150 // Ignore control characters
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151 if(ch < 0) continue;
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154 if(len <= 0) continue; // Protect against underflows
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155 if(pos == len) { // Simple case of end of string
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158 memmove(&ret[pos-1], &ret[pos], len-pos);
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162 write(_stdout, 1, &ch);
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168 ret = realloc(ret, space+1);
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169 if(!ret) return NULL;
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172 write(_stdout, 1, &ch);
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175 } while(ch != '\n');
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182 if(Length) *Length = len;
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188 * \fn void Parse_Args(char *str, char **dest)
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189 * \brief Parse a string into an argument array
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191 void Parse_Args(char *str, char **dest)
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194 char *buf = malloc( strlen(str) + 1 );
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199 // Trim leading whitespace
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200 while(*buf == ' ' && *buf) buf++;
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204 dest[i] = buf; // Save start of string
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206 while(*buf && *buf != ' ')
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210 while(*buf && !(*buf == '"' && buf[-1] != '\\'))
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214 if(*buf == '\0') break;
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216 while(*++buf == ' ' && *buf);
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217 if(*buf == '\0') break;
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227 * \fn void Command_Colour(int argc, char **argv)
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230 void Command_Colour(int argc, char **argv)
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233 char clrStr[6] = "\x1B[37m";
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235 // Verify Arg Count
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238 Print("Please specify a colour\n");
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243 for(fg=0;fg<8;fg++)
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244 if(strcmp(cCOLOUR_NAMES[fg], argv[1]) == 0)
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247 // Foreground a valid colour
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249 Print("Unknown Colour '");Print(argv[1]);Print("'\n");
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253 clrStr[3] = '0' + fg;
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254 write(_stdout, 6, clrStr);
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256 // Need to Set Background?
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259 for(bg=0;bg<8;bg++)
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260 if(strcmp(cCOLOUR_NAMES[bg], argv[2]) == 0)
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266 Print("Unknown Colour '");Print(argv[2]);Print("'\n");
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271 clrStr[3] = '0' + bg;
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272 write(_stdout, 6, clrStr);
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277 // Function Usage (Requested via a Goto (I know it's ugly))
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279 Print("Valid Colours are ");
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280 for(fg=0;fg<8;fg++)
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282 Print(cCOLOUR_NAMES[fg]);
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283 write(_stdout, 3, ", ");
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285 write(_stdout, 4, "\b\b\n");
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289 void Command_Clear(int argc, char **argv)
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291 write(_stdout, 4, "\x1B[2J"); //Clear Screen
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294 void Command_Cd(int argc, char **argv)
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296 char tmpPath[1024];
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302 Print(gsCurrentDirectory);Print("\n");
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306 GeneratePath(argv[1], gsCurrentDirectory, tmpPath);
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308 fp = open(tmpPath, 0);
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310 write(_stdout, 26, "Directory does not exist\n");
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316 if(!(stats.flags & FILEFLAG_DIRECTORY)) {
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317 write(_stdout, 17, "Not a Directory\n");
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321 strcpy(gsCurrentDirectory, tmpPath);
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