add ls and update shell

fsdir/Programs/src/Makefile

@@ -2,7 +2,7 @@ CFLAGS += -Wall -nostdlib -ffreestanding -m32 -g
 LDFLAGS += -nostdlib -ffreestanding -m32
 CC=i686-elf-gcc
 
-SRC = hello exectest read shell
+SRC = hello exectest read shell ls
 
 .SUFFIXES:
 

fsdir/Programs/src/ls.c

+#include "syscall.h"
+
+
+int main()
+{
+	uint8_t path[64];
+	sys_write(1, "Type filename: ", 15);
+	sys_read(0, path, 64);
+	int fd = sys_open(path);
+	sys_write(1, "Got fd ", 7);
+	char fdc = fd + '0';
+	sys_write(1, &fdc, 1);
+	sys_write(1, "\n", 1);
+
+
+	return 0;
+}
\ No newline at end of file

fsdir/Programs/src/shell.c

@@ -6,6 +6,7 @@ int main()
 	uint8_t test[64];
 	int ret;
 	while (1){
+		sys_write(1, "summerOS> ", 10);
 		sys_read(0, test, 64);
 		ret = sys_exec(test);
 		if (ret) {

kernel/Syscalls/syscalls.c

@@ -20,6 +20,7 @@ int32_t sys_write(int32_t fd, const void* buf, int32_t len)
 
 int32_t sys_open(uint8_t* name)
 {
+	printf("sys_open\n");
 	return -1;
 }