Simple shell added. Simple fprintf function added too.

19 files changed, 458 insertions, 101 deletions

diff --git a/Makefile b/Makefile
index ab689c0..db4d827 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 .PHONY: clean, mrproper, Init.rfs, floppy, commit
 
-Projects = tools/makeinitrd kernel user/lib user/test
+Projects = tools/makeinitrd kernel user/lib user/init user/test user/yosh
 QemuCmd = qemu-system-i386
 
 BasePath = $(shell pwd)
@@ -36,7 +36,7 @@ commit: mrproper
 	git commit -a; exit 0
 	git push origin
 
-$(Cdrom): menu_cdrom.lst src/kernel/kernel.elf src/user/test/test.elf
+$(Cdrom): menu_cdrom.lst src/kernel/kernel.elf src/user/test/test.elf src/user/init/init.elf src/user/yosh/yosh.elf
 	mkdir -p cdrom/boot/grub
 	if [ ! -e cdrom/boot/grub/stage2_eltorito ]; then \
 		echo "Please copy grub's stage2_eltorito to cdrom/boot/grub."; \
@@ -44,10 +44,11 @@ $(Cdrom): menu_cdrom.lst src/kernel/kernel.elf src/user/test/test.elf
 	fi
 	src/tools/makeinitrd/makeinitrd cdrom/initrd	\
 		src/user/test/test.elf:/bin/test 			\
+		src/user/yosh/yosh.elf:/bin/yosh 			\
 		README:/readme
 	cp menu_cdrom.lst cdrom/boot/grub/menu.lst
 	cp src/kernel/kernel.elf cdrom
-	cp src/user/test/test.elf cdrom
+	cp src/user/init/init.elf cdrom
 	genisoimage -R -b boot/grub/stage2_eltorito -no-emul-boot -boot-load-size 4 \
 		-boot-info-table -input-charset ascii -A TCE -o $(Cdrom) cdrom
 
diff --git a/menu_cdrom.lst b/menu_cdrom.lst
index 4728398..b941b63 100644
--- a/menu_cdrom.lst
+++ b/menu_cdrom.lst
@@ -2,5 +2,5 @@ timeout	10
 
 title	T/CE
 kernel	/kernel.elf
-module	/initrd somewhere
-module	/test.elf arg
+module	/initrd
+module	/init.elf /initrd/bin/test /initrd/bin/yosh
diff --git a/src/include/tce/vfs.h b/src/include/tce/vfs.h
index 20ea03b..00c80d7 100644
--- a/src/include/tce/vfs.h
+++ b/src/include/tce/vfs.h
@@ -3,7 +3,7 @@
 
 #include <types.h>
 
-typedef size_t FILE;
+typedef int FILE;
 
 typedef struct _file_info {
 	uint32_t type;
diff --git a/src/kernel/core/kmain.cpp b/src/kernel/core/kmain.cpp
index 96c4050..0aa047a 100644
--- a/src/kernel/core/kmain.cpp
+++ b/src/kernel/core/kmain.cpp
@@ -55,9 +55,12 @@ extern "C" void kmain(multiboot_info_t* mbd, int32_t magic) {
 	// Init display devices
 	text_display = new vgatxt(dot_dev);
 	dot_dev->add_child("vgatxt", text_display);
-	ke_vt = new vt(dot_dev, 80, 25);
+
+	ke_vt = new vt(dot_ui, 80, 25);
 	dot_ui->add_child("klog", ke_vt);
 	ke_vt->outputTo(text_display);
+	home_vt = new vt(dot_ui, 80, 25);
+	dot_ui->add_child("home", home_vt);
 
 	// Say hello
 	ke_vt->fgcolor = TC_LIGHTGRAY;
diff --git a/src/kernel/dev/keyboard.cpp b/src/kernel/dev/keyboard.cpp
index ce8e77b..3f54b99 100644
--- a/src/kernel/dev/keyboard.cpp
+++ b/src/kernel/dev/keyboard.cpp
@@ -150,7 +150,7 @@ void keyboard::handle(int scancode, bool pressed) {
 
 	// process keypress
 	if (output != 0) {
-		output->keyboardInput(kp);
+		output->keyboardInput(kp, this);
 	} else {
 		// TODO: enable reading directly keypresses from keyboard device
 	}
diff --git a/src/kernel/task/task.cpp b/src/kernel/task/task.cpp
index 02294bd..98204d6 100644
--- a/src/kernel/task/task.cpp
+++ b/src/kernel/task/task.cpp
@@ -119,7 +119,7 @@ uint32_t tasking_handleException(registers *regs) {
 	if (regs->eip >= K_HIGHHALF_ADDR) {
 		*ke_vt << "\nException in kernel. Stack trace:\n";
 		stack_trace(regs->ebp);
-	}	
+	}
 	if (regs->int_no == 14) {
 		*ke_vt << "\n>>> Process exiting.\n";
 		thread_exit_stackJmp(EX_PR_EXCEPTION);
diff --git a/src/kernel/ui/vt.cpp b/src/kernel/ui/vt.cpp
index 2869fec..2bd82ca 100644
--- a/src/kernel/ui/vt.cpp
+++ b/src/kernel/ui/vt.cpp
@@ -1,7 +1,7 @@
 #include "vt.h"
 #include <dev/display.h>
 
-vt *ke_vt = 0;
+vt *ke_vt = 0, *home_vt = 0;
 
 vt::vt(node* parent, int ww, int hh) : node(parent, FT_TERMINAL) {
 	w = ww; h = hh;
@@ -9,6 +9,7 @@ vt::vt(node* parent, int ww, int hh) : node(parent, FT_TERMINAL) {
 	bgcolor = TC_BLACK;
 	output = 0;
 	cursor_visible = true;
+	csr_l = csr_c = 0;
 
 	kbd_buffer_filled = 0;
 	kbd_waiter = 0;
@@ -148,9 +149,18 @@ void vt::outputTo(display *display) {
 			}
 		}
 	}
+	output->text_setcsr(csr_l, csr_c, cursor_visible);
 }
 
-void vt::keyboardInput(keypress kp) {
+void vt::keyboardInput(keypress kp, keyboard* from) {
+	if (kp.command == KB_RSUPER || kp.command == KB_LSUPER) {
+		if (this == home_vt) return;
+		// go to home terminal
+		home_vt->outputTo(output);
+		from->outputTo(home_vt);
+		output = 0;
+		return;
+	}
 	// convert to sequence of chars
 	int n = 0;
 	char b[8];
diff --git a/src/kernel/ui/vt.h b/src/kernel/ui/vt.h
index b26e95a..a80452b 100644
--- a/src/kernel/ui/vt.h
+++ b/src/kernel/ui/vt.h
@@ -45,7 +45,7 @@ class vt : public node {
 
 
 	void outputTo(display *display);
-	void keyboardInput(keypress kp);
+	void keyboardInput(keypress kp, keyboard* from);
 
 	virtual int write(size_t offset, size_t len, char* buffer);
 	virtual int read(size_t offset, size_t len, char* buffer);		// get keyboard input
@@ -53,7 +53,7 @@ class vt : public node {
 	virtual int link(node* to, int mode);
 };
 
-extern vt *ke_vt;
+extern vt *ke_vt, *home_vt;
 #define NL ke_vt->writeStr("\n");
 #define TAB ke_vt->writeStr("\t");
 #define WHERE { ke_vt->writeStr("(ke:");	\
diff --git a/src/kernel/vfs/node.cpp b/src/kernel/vfs/node.cpp
index ea7b531..c517aae 100644
--- a/src/kernel/vfs/node.cpp
+++ b/src/kernel/vfs/node.cpp
@@ -27,8 +27,7 @@ void vfs_setup() {
 
 node* vfs_find(node* root, char* fn) {
 	node* el = root;
-	char *path = strdup(fn);
-	char *s = path;
+	char *path = fn;
 	char *member = path;
 	
 	while (*path != 0 && el != 0) {
@@ -39,6 +38,7 @@ node* vfs_find(node* root, char* fn) {
 			} else {
 				*path = 0;
 				el = el->get_child(member);
+				*path = '/';
 				path++;
 				member = path;
 			}
@@ -49,7 +49,6 @@ node* vfs_find(node* root, char* fn) {
 	if (el != 0 && member != path) {
 		el = el->get_child(member);
 	}
-	kfree(s);
 
 	return el;
 }
diff --git a/src/user/init/Makefile b/src/user/init/Makefile
new file mode 100644
index 0000000..286de06
--- /dev/null
+++ b/src/user/init/Makefile
@@ -0,0 +1,6 @@
+Obj = main.o
+Out = init.elf
+
+include $(SrcPath)/user/app_common.make
+
+LDFLAGS += -Map test.map
diff --git a/src/user/init/main.c b/src/user/init/main.c
new file mode 100644
index 0000000..7d4ea0e
--- /dev/null
+++ b/src/user/init/main.c
@@ -0,0 +1,24 @@
+#include <tce/syscall.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+int main(char** args) {
+	int i;
+
+	FILE term = open("/.ui/klog", 0);
+	if (term <= 0) return -1;
+
+	fprint(term, "(init) Trivial/Computing Environment says hello. Press super to go home.\n");
+
+	for (i = 0; args[i] != 0; i++) {
+		if (i == 0) continue;
+		fprintf(term, "(init) Spawning %s...\n", args[i]);
+		int pid = run(args[i], 0);
+		if (pid < 0) {
+			fprint(term, "(init) Error. Sorry.\n");
+		} else {
+			waitpid(pid);
+		}
+	}
+	fprint(term, "(init) Goodbye.\n");
+}
diff --git a/src/user/lib/include/stdarg.h b/src/user/lib/include/stdarg.h
new file mode 100644
index 0000000..5cd74ff
--- /dev/null
+++ b/src/user/lib/include/stdarg.h
@@ -0,0 +1,10 @@
+#ifndef DEF_STDARG_H
+#define DEF_STDARG_H
+
+#define va_start(v,l) __builtin_va_start(v,l)
+#define va_arg(v,l) __builtin_va_arg(v,l)
+#define va_end(v) __builtin_va_end(v)
+#define va_copy(d,s) __builtin_va_copy(d,s)
+typedef __builtin_va_list va_list;
+
+#endif
diff --git a/src/user/lib/include/stdio.h b/src/user/lib/include/stdio.h
index e3f9d89..91fe169 100644
--- a/src/user/lib/include/stdio.h
+++ b/src/user/lib/include/stdio.h
@@ -1,7 +1,13 @@
 #ifndef DEF_STDIO_H
 #define DEF_STDIO_H
 
-void printk_int(int number);
-void printk_hex(unsigned number);
+#include <stdarg.h>
+
+void fprint(FILE f, char *s);
+void fprint_int(FILE f, int number);
+void fprint_hex(FILE f, unsigned number);
+void fprintf(FILE f, char *s, ...);
+
+char* freadln(FILE f);
 
 #endif
diff --git a/src/user/lib/std/stdio.c b/src/user/lib/std/stdio.c
index c11dd05..2bce2e3 100644
--- a/src/user/lib/std/stdio.c
+++ b/src/user/lib/std/stdio.c
@@ -1,9 +1,14 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <tce/syscall.h>
 
-void printk_int(int number) {
+void fprint(FILE f, char *s) {
+	write(f, 0, strlen(s), s);
+}
+
+void fprint_int(FILE f, int number) {
 	if (number == 0) {
-		printk("0");
+		fprint(f, "0");
 		return;
 	}
 	int negative = 0;
@@ -31,10 +36,10 @@ void printk_int(int number) {
 		number /= 10;
 	}
 	r[order] = 0;
-	printk(s);
+	fprint(f, s);
 }
 
-void printk_hex(unsigned v) {
+void fprint_hex(FILE f, unsigned v) {
 	char s[11] = {'0', 'x', 0};
 
 	int i;
@@ -46,5 +51,63 @@ void printk_hex(unsigned v) {
 		v = v << 4;
 	}
 	s[11] = 0;
-	printk(s);
+	fprint(f, s);
+}
+
+void fprintf(FILE f, char* format, ...) {
+	va_list ap;
+	va_start(ap, format);
+
+	char* start = format;
+
+	while (*format) {
+		if (*format == '%') {
+			if (start != format) write(f, 0, format - start, start);
+			format++;
+			if (*format == 'd' || *format == 'i') {
+				fprint_int(f, va_arg(ap, int));
+			} else if (*format == 'p') {
+				fprint_hex(f, va_arg(ap, uint32_t));
+			} else if (*format == 's') {
+				fprint(f, va_arg(ap, char*));
+			}
+			format++;
+			start = format;
+		} else {
+			format++;
+		}
+	}
+	if (start != format) write(f, 0, format - start, start);
+
+	va_end(ap);
+}
+
+char* freadln(FILE f) {
+	int i;
+
+	char *p = (char*)malloc(256);
+	char *b = p;
+
+	while (1) {
+		int l = read(f, 0, 255, b);
+		if (l < 0) {
+			free(b);
+			return 0;
+		}
+
+		for (i = 0; i < l; i++) {
+			if (b[i] == '\n') {
+				b[i+1] = 0;
+				return p;
+			}
+		}
+
+		int d = b - p + l;
+
+		char* newp = (char*)malloc(d + 256);
+		memcpy(newp, p, d);
+		free(p);
+		p = newp;
+		b = p + d;
+	}
 }
diff --git a/src/user/lib/std/stdlib.c b/src/user/lib/std/stdlib.c
index 21753e9..9d46b5c 100644
--- a/src/user/lib/std/stdlib.c
+++ b/src/user/lib/std/stdlib.c
@@ -4,8 +4,5 @@
 volatile int errno;
 
 void abort() {
-	printk("Abort - errno ");
-	printk_int(errno);
-	printk(".\n");
-	process_exit(-1);
+	process_exit(100 + errno);
 }
diff --git a/src/user/lib/std/string.c b/src/user/lib/std/string.c
index 20fd9e8..7cd8ede 100644
--- a/src/user/lib/std/string.c
+++ b/src/user/lib/std/string.c
@@ -3,7 +3,7 @@
 int strlen(const char *str) {
 	int i = 0;
 	while (str[i++]);
-	return i;
+	return i-1;
 }
 
 char *strchr(const char *str, char c) {
diff --git a/src/user/test/main.c b/src/user/test/main.c
index eb289ca..411cc71 100644
--- a/src/user/test/main.c
+++ b/src/user/test/main.c
@@ -4,6 +4,8 @@
 
 int threads = 0;
 
+FILE out = 0;
+
 void thread_cascade(void* d) {
 	int n = (int)d;
 
@@ -45,30 +47,30 @@ void list_dir(FILE f, int lv) {
 			i++;
 			continue;
 		}
-		for (k = 0; k < lv; k++) printk("  ");
-		printk(buf);
+		for (k = 0; k < lv; k++) fprint(out, "  ");
+		fprint(out, buf);
 		stat_relative(f, buf, &info);
-		if (info.type & FT_DIR) printk("/");
-		printk("    \t");
+		if (info.type & FT_DIR) fprint(out, "/");
+		fprint(out, "    \t");
 
-		if (info.type & FT_FILE) printk("file ");
-		if (info.type & FT_DIR) printk("dir ");
-		if (info.type & FT_SYMLINK) printk("symlink ");
-		if (info.type & FT_DEV) printk("dev ");
-		if (info.type & FT_TERMINAL) printk("term ");
+		if (info.type & FT_FILE) fprint(out, "file ");
+		if (info.type & FT_DIR) fprint(out, "dir ");
+		if (info.type & FT_SYMLINK) fprint(out, "symlink ");
+		if (info.type & FT_DEV) fprint(out, "dev ");
+		if (info.type & FT_TERMINAL) fprint(out, "term ");
 
 		if (info.type & FT_DIR) {
-			printk("  \t");
+			fprint(out, "  \t");
 			FILE ff = open_relative(f, buf, 0);
 			if (ff <= 0) {
-				printk("error: "); printk_int(ff); printk("\n"); 
+				fprintf(out, "error: %i\n", ff);
 			} else {
-				printk("fd: "); printk_int(ff); printk("\n");
+				fprintf(out, "fd: %i\n", ff);
 				list_dir(ff, lv+1);
 				close(ff);
 			}
 		} else {
-			printk("\n");
+			fprint(out, "\n");
 		}
 		i++;
 	}
@@ -77,20 +79,14 @@ void list_dir(FILE f, int lv) {
 void list_root() {
 	FILE f = open("/", 0);
 	if (f <= 0) {
-		printk(" -> Could not open '/', error #");
-		printk_int(f);
-		printk("...\n");
+		fprintf(out, " -> Could not open '/', error #%i\n", f);
 	} else {
-		printk("Now enumerating '/' (fd "); printk_int(f); printk(") :\n");
+		fprintf(out, "Now enumerating '/' (fd %i) :\n", f);
 		list_dir(f, 1);
 		close(f);
 	}
 }
 
-void fprint(FILE f, char *s) {
-	write(f, 0, strlen(s), s);
-}
-
 int main(char** args) {
 	char**a;
 	if (args != 0) {
@@ -102,66 +98,17 @@ int main(char** args) {
 		printk("\n");
 	}
 
-	printk("(test app) malloc(42) = ");
-	printk_hex((uint32_t)malloc(42));
-	printk("\n");
-
 	printk(" -> Creating thread cascade (total 2**4 = 16 threads)\n");
 	thread_new(thread_cascade, (void*)4);
 
-	printk(" -> Main thread now sleeping...\n");
 	while (1) {
 		thread_sleep(100);
 		if (threads == 0) break;
 	}
-	printk("\n -> Ok, let's try something else.\n");
-	list_root();
-
-	FILE f = open("/.ui/klog", 0);
-	if (f <= 0) {
-		printk(" -> Error #"); printk_int(f);  printk(" - too bad. Exiting.\n");
-	} else {
-		fprint(f, " -> Now reading && writing from/to virtual terminal '/.ui/klog'\n");
-		while (1) {
-			fprint(f, " > ");
-
-			char buffer[256];
-			int l = read(f, 0, 255, buffer);
-			buffer[l] = 0;
-			if (buffer[l-1] == '\n') {
-				buffer[l-1] = 0; l--;
+	printk("\n");
 
-				if (strcmp(buffer, "about") == 0) {
-					fprint(f, "Trivial/Computing Environment v0.1.0 - useless shell, first ediiton.\n");
-				} else if (strcmp(buffer, "help") == 0) {
-					fprint(f, "Available commands: about, help, exit.\n");
-				} else if (strcmp(buffer, "exit") == 0) {
-					fprint(f, "Exiting the shell. See you later!\n");
-					break;
-				} else if (strcmp(buffer, "gotosleep") == 0) {
-					while (1) thread_sleep(1000);
-				} else if (strcmp(buffer, "spawn") == 0) {
-					char *args[] = {"hello", "world", 0};
-					int pid = run("/somewhere/bin/test", args);
-					if (pid < 0) {
-						printk("Error "); printk_int(pid); printk("\n");
-					} else {
-						printk("Launched, pid="); printk_int(pid); printk("\n");
-						int ret = waitpid(pid);
-						printk("Exited, ret="); printk_int(ret); printk("\n");
-					}
-				} else if (strcmp(buffer, "root") == 0) {
-					list_root();
-				} else {
-					fprint(f, "Unknown command : ");
-					fprint(f, buffer);
-					fprint(f, "\n");
-				}
-			} else {
-				fprint(f, " - - - oops\n");
-			}
-		}
-	}
+	out = open("/.ui/klog", 0);
+	list_root();
 
 	return 0;
 }
diff --git a/src/user/yosh/Makefile b/src/user/yosh/Makefile
new file mode 100644
index 0000000..9879a73
--- /dev/null
+++ b/src/user/yosh/Makefile
@@ -0,0 +1,6 @@
+Obj = main.o
+Out = yosh.elf
+
+include $(SrcPath)/user/app_common.make
+
+LDFLAGS += -Map test.map
diff --git a/src/user/yosh/main.c b/src/user/yosh/main.c
new file mode 100644
index 0000000..957060e
--- /dev/null
+++ b/src/user/yosh/main.c
@@ -0,0 +1,285 @@
+#include <tce/syscall.h>
+#include <tce/vfs.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+FILE out, cwd_f;
+char *cwd;
+
+void about() {
+	fprint(out, "Trivial/Computing Environment v0.1.0 - yosh 2.\n");
+}
+
+void help(char *args[]) {
+	if (args[1] == 0) {
+		fprint(out, "Available commands: about, help, exit, ls, cd, switch.\n");
+	} else if (strcmp(args[1], "about") == 0) {
+		fprint(out, "Usage:\tabout\nShows some info about yosh. Very usefull.\n");
+	} else if (strcmp(args[1], "help") == 0) {
+		fprint(out, "Usage:\thelp\n\thelp <command>\n");
+		fprint(out, "Shows some info about the command you want, or commands in general.\n");
+	} else if (strcmp(args[1], "exit") == 0) {
+		fprint(out, "Usage:\texit\n");
+		fprint(out, "Exits the shell.\nWill probably make your system panic if you only have a shell running.\n");
+	} else if (strcmp(args[1], "cd") == 0) {
+		fprint(out, "Usage:\tcd <location>\nGoes to the location specified.\n");
+	} else if (strcmp(args[1], "ls") == 0) {
+		fprint(out, "Usage:\tls\n\tls <location>...\nShows the content of the current/specified directory.\n");
+	} else if (strcmp(args[1], "switch") == 0) {
+		fprint(out, "Usage:\tswitch <vt name>\nSwitchs focus to specified virtual terminal.\n");
+		fprint(out, "Type `ls /.ui` to see available terminals.\n");
+	} else {
+		fprintf(out, "No such command: %s\n", args[1]);
+	}
+}
+
+void simplify_path(char* p) {
+	char *it = p;
+	char *member = it;
+	while (*it != 0) {
+		if (*it == '/') {
+			if (it == member && it != p) {
+				// two consecutive slashes
+				char *i = member;
+				while (1) {
+					i[0] = i[1];
+					if (i[0] == 0) break;
+					i++;
+				}
+			} else {
+				*it = 0;
+				if (strcmp(member, ".") == 0) {
+					char *i = member;
+					while (1) {
+						i[0] = i[2];
+						if (i[0] == 0) break;
+						i++;
+					}
+				} else if (strcmp(member, "..") == 0) {
+					*it = '/';
+					char* start = member - 2;
+					char* next = member + 3;
+					while (start > p && *start != '/') {
+						start--;
+					}
+					start++;
+					it = member = start;
+					while (1) {
+						*start = *next;
+						if (*start == 0) break;
+						start++;
+						next++;
+					}
+				} else {
+					*it = '/';
+					it++;
+					member = it;
+				}
+			}
+		} else {
+			it++;
+		}
+	}
+}
+
+char* path_cat (char* a, char* b) {
+	char* ret;
+	if (b[0] == '/') {
+		int lb = strlen(b);
+		ret = (char*)malloc(lb + 2);
+		memcpy(ret, b, lb);
+		if (ret[lb - 1] != '/') {
+			ret[lb] = '/';
+			lb++;
+		}
+		ret[lb] = 0;
+	} else {
+		int la = strlen(a);
+		int lb = strlen(b);
+
+		ret = (char*)malloc(la + lb + 2);
+		memcpy(ret, a, la);
+		memcpy(ret + la, b, lb);
+		if (ret[la + lb - 1] != '/') {
+			ret[la + lb] = '/';
+			lb++;
+		}
+		ret[la + lb] = 0;
+	}
+	simplify_path(ret);
+	return ret;
+}
+
+void cd(char **args) {
+	if (args[1] == 0) {
+		fprint(out, "Usage: cd <directory>\n");
+	}
+	if (strcmp(args[1], ".") == 0) return;
+
+	char* newcwd = path_cat(cwd, args[1]);
+
+	file_info info;
+	int i = stat(newcwd, &info);
+	if (i == E_NOT_FOUND) {
+		fprint(out, "No such file or directory.\n");
+		free(newcwd);
+	} else if (i < 0) {
+		fprintf(out, "Error stating: %i\n", i);
+		free(newcwd);
+	} else if ((info.type & FT_DIR) == 0) {
+		fprint(out, "Not a directory.\n");
+		free(newcwd);
+	} else {
+		FILE nf = open(newcwd, 0);
+		if (nf <= 0) {
+			fprintf(out, "Error opening: %i\n", nf);
+			free(newcwd);
+		} else {
+			free(cwd);
+			cwd = newcwd;
+			close(cwd_f);
+			cwd_f = nf;
+		}
+	}
+}
+
+void ls_dir(FILE f) {
+	file_info info;
+	int i = 0;
+	char buf[256];
+	while (read(f, i, 256, buf) > 0) {
+		i++;
+
+		if (strcmp(buf, ".") == 0 || strcmp(buf, "..") == 0) continue;
+
+		fprintf(out, "  %s", buf);
+
+		stat_relative(f, buf, &info);
+		if (info.type & FT_DIR) fprint(out, "/");
+		fprint(out, "   \t");
+
+		if (info.type & FT_FILE) fprint(out, "file ");
+		if (info.type & FT_DIR) fprint(out, "dir ");
+		if (info.type & FT_SYMLINK) fprint(out, "symlink ");
+		if (info.type & FT_DEV) fprint(out, "dev ");
+		if (info.type & FT_TERMINAL) fprint(out, "term ");
+
+		fprint(out, "\t");
+		if (info.type & FT_TERMINAL) {
+			fprintf(out, "%ix%i", info.size >> 16, info.size & 0xFFFF);
+		} else if ((info.type & FT_DEV) == 0) {
+			fprintf(out, "%i", info.size);
+		}
+
+		fprint(out, "\n");
+	}
+}
+
+void ls(char **args) {
+	if (args[1] == 0) {
+		ls_dir(cwd_f);
+	} else {
+		int i;
+		for (i = 1; args[i] != 0; i++) {
+			fprintf(out, "Contents of %s :\n", args[i]);
+			char* d = path_cat(cwd, args[i]);
+			file_info info;
+			int e = stat(d, &info);
+			if (e == E_NOT_FOUND) {
+				fprint(out, "  No such file or directory\n");
+			} else if (e < 0) {
+				fprintf(out, "  Error stating: %i\n", e);
+			} else {
+				FILE ff = open(d, 0);
+				if (ff <= 0) {
+					fprintf(out, "  Error opening: %i\n", ff);
+				} else {
+					ls_dir(ff);
+					close(ff);
+				}
+			}
+			free(d);
+		}
+	}
+}
+
+void t_switch(char** args) {
+	if (args[1] == 0) {
+		fprint(out, "Usage: switch <vt_name>\n");
+		return;
+	}
+	char* p = path_cat("/.ui/", args[1]);
+	int i;
+	if ((i = link(p, "/.dev/vgatxt", LM_OUTPUT_TO)) == 0) {
+		link("/.dev/ps2kbd", p, LM_OUTPUT_TO);
+	} else {
+		fprintf(out, "Error %i\n", i);
+	}
+}
+
+int main(char **sh_args) {
+	out = open("/.ui/home", 0);
+	if (out <= 0) {
+		return -1;
+	}
+
+	about();
+
+	cwd = strdup("/");
+	cwd_f = open(cwd, 0);
+	
+	while (1) {
+		fprintf(out, " %s  ", cwd);
+
+		char *s = freadln(out);
+		if (s == 0) return -1;
+		int l = strlen(s);
+		if (s[l-1] == '\n') {
+			s[l-1] = 0; l--;
+
+			char *c_args[16] = {0}, *cmd;
+			c_args[0] = s;
+			int argc = 1;
+			for (cmd = s; *cmd != 0; cmd++) {
+				if (*cmd == ' ') {
+					*cmd = 0;
+					if (cmd[1] != ' ' && cmd[1] != 0) {
+						c_args[argc] = cmd + 1;
+						argc++;
+						if (argc == 15) break;
+					}
+				}
+			}
+
+			if (strcmp(c_args[0], "about") == 0) {
+				about();
+			} else if (strcmp(c_args[0], "help") == 0) {
+				help(c_args);
+			} else if (strcmp(c_args[0], "exit") == 0) {
+				fprint(out, "Exiting the shell. See you later!\n");
+				break;
+			} else if (strcmp(c_args[0], "cd") == 0) {
+				cd(c_args);
+			} else if (strcmp(c_args[0], "ls") == 0) {
+				ls(c_args);
+			} else if (strcmp(c_args[0], "switch") == 0) {
+				t_switch(c_args);
+			} else {
+				char *c = path_cat(cwd, c_args[0]);
+				int pid = run(c, c_args + 1);
+				if (pid <= 0) {
+					fprintf(out, "Error %i\n", pid);
+				} else {
+					int ret = waitpid(pid);
+					fprintf(out, "Exited with status %i\n", ret);
+				}
+				free(c);
+			}
+		} else {
+			fprint(out, "[freadln fail, sorry.]\n");
+		}
+		free(s);
+	}
+
+	return 0;
+}