96 lines
2.6 KiB
JavaScript
96 lines
2.6 KiB
JavaScript
let emulator = this.emulator
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let me = this
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emulator.fs9p.update_file = async function(file,data){
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const convert = ISOTerminal.prototype.convert
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const p = this.SearchPath(file);
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if(p.id === -1)
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{
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return emulator.create_file(file,data)
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}
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const inode = this.GetInode(p.id);
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const buf = typeof data == 'string' ? convert.toUint8Array(data) : data || ""
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if( buf.length == 0 ) return new Promise( (resolve,reject) => resolve(data) )
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try{
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await this.Write(p.id,0, buf.length, buf )
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// update inode
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inode.size = buf.length
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const now = Math.round(Date.now() / 1000);
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inode.atime = inode.mtime = now;
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return new Promise( (resolve,reject) => resolve(buf) )
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}catch(e){
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console.error({file,data})
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return new Promise( (resolve,reject) => reject(e) )
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}
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}
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emulator.fs9p.append_file = async function(file,data){
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const convert = ISOTerminal.prototype.convert
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const p = this.SearchPath(file);
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if(p.id === -1)
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{
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return Promise.resolve(null);
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}
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const inode = this.GetInode(p.id);
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const buf = typeof data == 'string' ? convert.toUint8Array(data) : data
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await this.Write(p.id, inode.size, buf.length, buf )
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// update inode
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inode.size = inode.size + buf.length
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const now = Math.round(Date.now() / 1000);
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inode.atime = inode.mtime = now;
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return new Promise( (resolve,reject) => resolve(buf) )
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}
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emulator.fs9p.read_file_world = async function(file){
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const p = this.SearchPath(file);
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if(p.id === -1)
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{
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return Promise.resolve(null);
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}
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const inode = this.GetInode(p.id);
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const perms = this.parseFilePermissions(inode.mode)
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if( !perms.world.read ){
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return Promise.resolve(null);
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}
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return this.Read(p.id, 0, inode.size);
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}
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emulator.fs9p.parseFilePermissions = function(permissionInt) {
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// Convert the permission integer to octal
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const octalPermissions = permissionInt.toString(8);
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// Extract the permission bits (last 3 digits in octal)
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const permissionBits = octalPermissions.slice(-3);
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function parsePermission(digit) {
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const num = parseInt(digit, 10);
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return {
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read: Boolean(num & 4), // 4 = read
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write: Boolean(num & 2), // 2 = write
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execute: Boolean(num & 1) // 1 = execute
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};
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}
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// Decode the permissions
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const permissions = {
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owner: parsePermission(permissionBits[0]),
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group: parsePermission(permissionBits[1]),
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world: parsePermission(permissionBits[2]),
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};
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return permissions;
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}
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