/*
- * Acess 2
- * Architecture Independent System Init
+ * Acess 2 Kernel
+ * - By John Hodge (thePowersGang)
* system.c
+ * - Architecture Independent System Init
*/
#define DEBUG 0
#include <acess.h>
-#define N_VARIABLES 16
-#define N_MAX_ARGS BITS
-
-// === TYPES ===
-typedef struct
-{
- int TrueLine;
- int nParts;
- char **Parts;
-} tConfigLine;
-typedef struct
-{
- int nLines;
- tConfigLine Lines[];
-} tConfigFile;
-typedef struct
-{
- const char *Name; // Name
- int MinArgs; // Minimum number of arguments
- int MaxArgs; // Maximum number of arguments
- Uint IntArgs; // Bitmap of arguments that should be treated as integers
- int Index; //
- const char *OptDefaults[N_MAX_ARGS]; // Default values for optional arguments
-} tConfigCommand;
-
// === IMPORTS ===
extern void Arch_LoadBootModules(void);
extern int Modules_LoadBuiltins(void);
void System_ParseVFS(char *Arg);
void System_ParseModuleArgs(char *Arg);
void System_ParseSetting(char *Arg);
-void System_ExecuteScript(void);
-tConfigFile *System_Int_ParseFile(char *File);
-
-// === CONSTANTS ===
-enum eConfigCommands {
- CC_LOADMODULE,
- CC_SPAWN,
- CC_MOUNT,
- CC_SYMLINK,
- CC_MKDIR,
- CC_OPEN,
- CC_CLOSE,
- CC_IOCTL
-};
-const tConfigCommand caConfigCommands[] = {
- {"module", 1,2, 00, CC_LOADMODULE, {"",NULL}}, // Load a module from a file
- {"spawn", 1,1, 00, CC_SPAWN, {NULL}}, // Spawn a process
- // --- VFS ---
- {"mount", 3,4, 00, CC_MOUNT, {"",0}}, // Mount a device
- {"symlink", 2,2, 00, CC_SYMLINK, {0}}, // Create a Symbolic Link
- {"mkdir", 1,1, 00, CC_MKDIR, {0}}, // Create a Directory
- {"open", 1,2, 00, CC_OPEN, {(void*)VFS_OPENFLAG_READ,0}}, // Open a file
- {"close", 1,1, 01, CC_CLOSE, {0}}, // Close an open file
- {"ioctl", 3,3, 03, CC_IOCTL, {0}}, // Call an IOCtl
-
- {"", 0,0, 0, 0, {0}}
-};
-#define NUM_CONFIG_COMMANDS (sizeof(caConfigCommands)/sizeof(caConfigCommands[0]))
// === GLOBALS ===
-const char *gsConfigScript = "/Acess/Conf/BootConf.cfg";
+const char *gsInitBinary = "/Acess/SBin/init";
char *argv[32];
int argc;
System_ExecuteCommandLine();
// - Execute the Config Script
- Log_Log("Config", "Executing config script '%s'", gsConfigScript);
- System_ExecuteScript();
+ Log_Log("Config", "Spawning init '%s'", gsInitBinary);
+ Proc_Spawn(gsInitBinary);
// Set the debug to be echoed to the terminal
Log_Log("Config", "Kernel now echoes to VT7 (Ctrl-Alt-F8)");
*value = '\0'; // Remove '='
value ++; // and eat it's position
- if(strcmp(Arg, "SCRIPT") == 0) {
- Log_Log("Config", "Config Script: '%s'", value);
+ if(strcmp(Arg, "INIT") == 0) {
+ Log_Log("Config", "Init binary: '%s'", value);
if(strlen(value) == 0)
- gsConfigScript = NULL;
- else
- gsConfigScript = value;
- } else {
- Log_Warning("Config", "Kernel config setting '%s' is not recognised", Arg);
- }
-
- }
-}
-
-/**
- * \fn void System_ExecuteScript()
- * \brief Reads and parses the boot configuration script
- */
-void System_ExecuteScript(void)
-{
- int fp;
- int fLen = 0;
- int i, j, k;
- int val;
- int result = 0;
- int variables[N_VARIABLES];
- int bReplaced[N_MAX_ARGS];
- char *fData;
- char *jmpTarget;
- tConfigFile *file;
- tConfigLine *line;
-
- ENTER("");
-
- // Open Script
- fp = VFS_Open(gsConfigScript, VFS_OPENFLAG_READ);
- if(fp == -1) {
- Log_Warning("Config", "Passed script '%s' does not exist", gsConfigScript);
- LEAVE('-');
- return;
- }
-
- // Get length
- VFS_Seek(fp, 0, SEEK_END);
- fLen = VFS_Tell(fp);
- LOG("VFS_Tell(0x%x) = %i", fp, fLen);
- VFS_Seek(fp, 0, SEEK_SET);
- // Read into memory buffer
- fData = malloc(fLen+1);
- VFS_Read(fp, fLen, fData);
- fData[fLen] = '\0';
- VFS_Close(fp);
-
-
- // Parse File
- file = System_Int_ParseFile(fData);
-
- // Parse each line
- for( i = 0; i < file->nLines; i++ )
- {
- line = &file->Lines[i];
- if( line->nParts == 0 ) continue; // Skip blank
-
- if(line->Parts[0][0] == ':') continue; // Ignore labels
-
- // Prescan and eliminate variables
- for( j = 1; j < line->nParts; j++ )
- {
- LOG("Arg #%i is '%s'", j, line->Parts[j]);
- bReplaced[j] = 0;
- if( line->Parts[j][0] != '$' ) continue;
- if( line->Parts[j][1] == '?' ) {
- val = result;
- }
- else {
- val = atoi( &line->Parts[j][1] );
- if( val < 0 || val > N_VARIABLES ) continue;
- val = variables[ val ];
- }
- LOG("Replaced arg %i ('%s') with 0x%x", j, line->Parts[j], val);
- line->Parts[j] = malloc( BITS/8+2+1 );
- sprintf(line->Parts[j], "0x%x", val);
- bReplaced[j] = 1;
- }
-
- // Find the command name
- for( j = 0; j < NUM_CONFIG_COMMANDS; j++ )
- {
- const char *args[N_MAX_ARGS];
-
- if(strcmp(line->Parts[0], caConfigCommands[j].Name) != 0) continue;
-
- Log_Debug("Config", "Command '%s', %i args passed", line->Parts[0], line->nParts-1);
-
- // Check against minimum argument count
- if( line->nParts - 1 < caConfigCommands[j].MinArgs ) {
- Log_Warning("Config",
- "Configuration command '%s' requires at least %i arguments, %i given",
- caConfigCommands[j].Name, caConfigCommands[j].MinArgs, line->nParts-1
- );
- break;
- }
-
- // Check for extra arguments
- if( line->nParts - 1 > caConfigCommands[j].MaxArgs ) {
- Log_Warning("Config",
- "Configuration command '%s' takes at most %i arguments, %i given",
- caConfigCommands[j].Name, caConfigCommands[j].MaxArgs, line->nParts-1
- );
- break;
- }
-
- // Fill in defaults
- for( k = caConfigCommands[j].MaxArgs-1; k > line->nParts - 1; k-- ) {
- args[k] = caConfigCommands[j].OptDefaults[k];
- }
-
- // Convert arguments to integers
- for( k = line->nParts-1; k--; )
- {
- if( k < 32 && (caConfigCommands[j].IntArgs & (1 << k)) ) {
- args[k] = (const char *)(Uint)atoi(line->Parts[k+1]);
- }
- else {
- args[k] = (char *)line->Parts[k+1];
- }
- LOG("args[%i] = %p", k, args[k]);
- }
- switch( (enum eConfigCommands) caConfigCommands[j].Index )
- {
- case CC_LOADMODULE:
- result = Module_LoadFile( args[0], args[1] );
- break;
- case CC_SPAWN:
- result = Proc_Spawn( args[0] );
- break;
- case CC_MOUNT:
- result = VFS_Mount( args[0], args[1], args[2], args[3] );
- break;
- case CC_SYMLINK:
- result = VFS_Symlink( args[0], args[1] );
- break;
- case CC_OPEN:
- result = VFS_Open( args[0], (Uint)args[1] );
- break;
- case CC_CLOSE:
- VFS_Close( (Uint)args[0] );
- result = 0;
- break;
- case CC_MKDIR:
- result = VFS_MkDir( args[0] );
- break;
- case CC_IOCTL:
- result = VFS_IOCtl( (Uint)args[0], (Uint)args[1], (void *)args[2] );
- break;
- }
- LOG("Config", "result = %i", result);
- break;
- }
- if( j < NUM_CONFIG_COMMANDS ) continue;
-
- // --- State and Variables ---
- if(strcmp(line->Parts[0], "set") == 0)
- {
- int to, value;
- if( line->nParts-1 != 2 ) {
- Log_Warning("Config", "Configuration command 'set' requires 2 arguments, %i given",
- line->nParts-1);
- continue;
- }
-
- to = atoi(line->Parts[1]);
- value = atoi(line->Parts[2]);
-
- variables[to] = value;
- result = value;
- }
- // if <val1> <op> <val2> <dest>
- else if(strcmp(line->Parts[0], "if") == 0)
- {
- if( line->nParts-1 != 4 ) {
- Log_Warning("Config", "Configuration command 'if' requires 4 arguments, %i given",
- line->nParts-1);
- }
-
- result = atoi(line->Parts[1]);
- val = atoi(line->Parts[3]);
-
- jmpTarget = line->Parts[4];
-
- Log_Log("Config", "IF 0x%x %s 0x%x THEN GOTO %s",
- result, line->Parts[2], val, jmpTarget);
-
- if( strcmp(line->Parts[2], "<" ) == 0 ) {
- if( result < val ) goto jumpToLabel;
- }
- else if( strcmp(line->Parts[2], "<=") == 0 ) {
- if( result <= val ) goto jumpToLabel;
- }
- else if( strcmp(line->Parts[2], ">" ) == 0 ) {
- if (result > val ) goto jumpToLabel;
- }
- else if( strcmp(line->Parts[2], ">=") == 0 ) {
- if( result >= val ) goto jumpToLabel;
- }
- else if( strcmp(line->Parts[2], "=") == 0 ) {
- if( result == val ) goto jumpToLabel;
- }
- else if( strcmp(line->Parts[2], "!=") == 0 ) {
- if( result != val ) goto jumpToLabel;
- }
- else {
- Log_Warning("Config", "Unknown comparision '%s' in `if`", line->Parts[2]);
- }
-
- }
- else if(strcmp(line->Parts[0], "goto") == 0) {
- if( line->nParts-1 != 1 ) {
- Log_Warning("Config", "Configuration command 'goto' requires 1 arguments, %i given",
- line->nParts-1);
- }
- jmpTarget = line->Parts[1];
-
- jumpToLabel:
- for( j = 0; j < file->nLines; j ++ )
- {
- if(file->Lines[j].nParts == 0)
- continue;
- if(file->Lines[j].Parts[0][0] != ':')
- continue;
- if( strcmp(file->Lines[j].Parts[0]+1, jmpTarget) == 0)
- break;
- }
- if( j == file->nLines )
- Log_Warning("Config", "Unable to find label '%s'", jmpTarget);
+ gsInitBinary = NULL;
else
- i = j;
+ gsInitBinary = value;
}
else {
- Log_Warning("Config", "Unknown configuration command '%s' on line %i",
- line->Parts[0],
- line->TrueLine
- );
- }
- }
-
- // Clean up after ourselves
- for( i = 0; i < file->nLines; i++ ) {
- if( file->Lines[i].nParts == 0 ) continue; // Skip blank
- for( j = 0; j < file->Lines[i].nParts; j++ ) {
- if(IsHeap(file->Lines[i].Parts[j]))
- free(file->Lines[i].Parts[j]);
- }
- free( file->Lines[i].Parts );
- }
-
- // Free data
- free( file );
- free( fData );
-
- LEAVE('-');
-}
-
-/**
- * \brief Parses a config file
- * \param FileData Read/Write buffer containing the config file data
- * (will be modified)
- * \return ::tConfigFile structure that represents the original contents
- * of \a FileData
- */
-tConfigFile *System_Int_ParseFile(char *FileData)
-{
- char *ptr;
- char *start;
- int nLines = 1;
- int i, j;
- tConfigFile *ret;
-
- ENTER("pFileData", FileData);
-
- // Prescan and count the number of lines
- for(ptr = FileData; *ptr; ptr++)
- {
- if(*ptr != '\n') continue;
-
- if(ptr == FileData) {
- nLines ++;
- continue;
- }
-
- // Escaped EOL
- if(ptr[-1] == '\\') continue;
-
- nLines ++;
- }
-
- LOG("nLines = %i", nLines);
-
- // Ok so we have `nLines` lines, now to allocate our return
- ret = malloc( sizeof(tConfigFile) + sizeof(tConfigLine)*nLines );
- ret->nLines = nLines;
-
- // Read the file for real
- for(
- ptr = FileData, i = 0;
- *ptr;
- i++
- )
- {
- start = ptr;
-
- ret->Lines[i].nParts = 0;
- ret->Lines[i].Parts = NULL;
-
- // Count parts
- for(;;)
- {
- // Read leading whitespace
- while( *ptr == '\t' || *ptr == ' ' ) ptr++;
-
- // End of line/file
- if( *ptr == '\0' || *ptr == '\n' ) {
- if(*ptr == '\n') ptr ++;
- break;
- }
- // Comment
- if( *ptr == '#' || *ptr == ';' ) {
- while( *ptr && *ptr != '\n' ) ptr ++;
- if(*ptr == '\n') ptr ++;
- break;
- }
-
- ret->Lines[i].nParts ++;
- // Quoted
- if( *ptr == '"' ) {
- ptr ++;
- while( *ptr && !(*ptr == '"' && ptr[-1] == '\\') && *ptr != '\n' )
- ptr++;
- continue;
- }
- // Unquoted
- while( *ptr && !(*ptr == '\t' || *ptr == ' ') && *ptr != '\n' )
- ptr++;
- }
-
- LOG("ret->Lines[%i].nParts = %i", i, ret->Lines[i].nParts);
-
- if( ret->Lines[i].nParts == 0 ) {
- ret->Lines[i].Parts = NULL;
- continue;
+ Log_Warning("Config", "Kernel config setting '%s' is not recognised", Arg);
}
- // Allocate part list
- ret->Lines[i].Parts = malloc( sizeof(char*) * ret->Lines[i].nParts );
-
- // Fill list
- for( ptr = start, j = 0; ; j++ )
- {
- // Read leading whitespace
- while( *ptr == '\t' || *ptr == ' ' ) ptr++;
-
- // End of line/file
- if( *ptr == '\0' || *ptr == '\n' ) {
- if(*ptr == '\n') ptr ++;
- break;
- }
- // Comment
- if( *ptr == '#' || *ptr == ';' ) {
- while( *ptr && *ptr != '\n' ) ptr ++;
- if(*ptr == '\n') ptr ++;
- break;
- }
-
- ret->Lines[i].Parts[j] = ptr;
-
- // Quoted
- if( *ptr == '"' ) {
- ptr ++;
- ret->Lines[i].Parts[j] = ptr;
- while( *ptr && !(*ptr == '"' && ptr[-1] == '\\') && *ptr != '\n' )
- ptr++;
- }
- // Unquoted
- else {
- while( *ptr != '\t' && *ptr != ' ' && *ptr != '\n' )
- ptr++;
- }
-
- // Break if we have reached NULL
- if( *ptr == '\0' ) {
- LOG("ret->Lines[%i].Parts[%i] = '%s'", i, j, ret->Lines[i].Parts[j]);
- break;
- }
- if( *ptr == '\n' ) {
- *ptr = '\0';
- LOG("ret->Lines[%i].Parts[%i] = '%s'", i, j, ret->Lines[i].Parts[j]);
- ptr ++;
- break;
- }
- *ptr = '\0'; // Cap off string
- LOG("ret->Lines[%i].Parts[%i] = '%s'", i, j, ret->Lines[i].Parts[j]);
- ptr ++; // And increment for the next round
- }
}
-
- if( i < ret->nLines ) {
- ret->Lines[i].nParts = 0;
- ret->Lines[i].Parts = NULL;
- LOG("Cleaning up final empty line");
- }
-
- LEAVE('p', ret);
- return ret;
}
+
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