Stop building binaries out of loader/

This is what userspace/ is for; consequentally, all userspace
applications now depend on the full toolchain and will build using the C
library.

Makefile

@@ -23,7 +23,6 @@ REALEMU      = $(patsubst %.c,%.o,$(wildcard kernel/v8086/*.c))
 
 SUBMODULES = ${MODULES} ${FILESYSTEMS} ${VIDEODRIVERS} ${DEVICES} ${VIRTUALMEM} ${MISCMODS} ${SYSTEM} ${DATASTRUCTS} ${CPUBITS} ${REALEMU}
 
-BINARIES = hdd/bin/hello hdd/bin/echo hdd/bin/yes hdd/bin/sh
 UTILITIES = util/bin/readelf util/bin/typewriter
 EMU = qemu
 GENEXT = genext2fs
@@ -131,7 +130,7 @@ initrd/boot/kernel: toaruos-kernel
 hdd:
 	@mkdir hdd
 
-toaruos-disk.img: hdd hdd/bs.bmp ${BINARIES}
+toaruos-disk.img: hdd hdd/bs.bmp
 	@${BEG} "hdd" "Generating a Hard Disk image..."
 	@-rm -f toaruos-disk.img
 	@${GENEXT} -d hdd -q -b 131072 -N 4096 toaruos-disk.img ${ERRORS}

loader/hello.c

@@ -1,13 +0,0 @@
-#include <syscall.h>
-
-int main(int argc, char ** argv) {
-	char * str = "Hello world!\n";
-	syscall_write(1 /* stdout */, str, 13);
-	return 0;
-}
-
-/*
- * vim:tabstop=4
- * vim:noexpandtab
- * vim:shiftwidth=4
- */

loader/sh.c

@@ -1,30 +0,0 @@
-#include <syscall.h>
-
-int main(int argc, char ** argv) {
-	/* A Simple Shell */
-	syscall_print("My PID is ");
-	char x[] = {
-		'0' + syscall_getpid(),
-		0
-	};
-	syscall_print(x);
-	syscall_print("\n");
-	int i = syscall_getpid();
-	for (int j = 0; j < 5; ++j) {
-		syscall_fork();
-		if (syscall_getpid() != i) {
-			syscall_print("[Forked]\n");
-			char * bin = "/bin/echo";
-			char * args = "Executed echo.";
-			char * argv_[] = {
-				bin,
-				args,
-				0
-			};
-			syscall_execve(bin, argv_, 0);
-		} else {
-			syscall_print("(hello from parent)\n");
-		}
-	}
-	return 0;
-}

loader/yes.c

@@ -1,19 +0,0 @@
-#include <syscall.h>
-
-int main(int argc, char ** argv) {
-	char * yes = "y";
-	if (argc > 1) {
-		yes = argv[1];
-	}
-	while (1) {
-		syscall_print(yes);
-		syscall_print("\n");
-	}
-	return 0;
-}
-
-/*
- * vim:tabstop=4
- * vim:noexpandtab
- * vim:shiftwidth=4
- */

userspace/echo.c

@@ -1,22 +1,13 @@
-#include <syscall.h>
-
-/* I really need a standard library */
-int
-strlen(
-		const char *str
-	  ) {
-	int i = 0;
-	while (str[i] != (char)0) {
-		++i;
-	}
-	return i;
-}
+/* vim: tabstop=4 shiftwidth=4 noexpandtab
+ *
+ * echo
+ */
+#include <stdio.h>
 
 void usage() {
-	char * str ="echo [-n] [-e] [STRING]...\n"
-				"  -n    do not output a new line at the end\n"
-				"  -e    process escape sequences\n";
-	syscall_write(1, str, strlen(str));
+	printf("echo [-n] [-e] [STRING]...\n"
+	       "  -n    do not output a new line at the end\n"
+	       "  -e    process escape sequences\n");
 }
 
 int main(int argc, char ** argv) {
@@ -59,20 +50,14 @@ int main(int argc, char ** argv) {
 				}
 			}
 		}
-		syscall_write(1, argv[i], strlen(argv[1]));
+		printf("%s",argv[i]);
 		if (i != argc - 1) {
-			syscall_write(1, " ", 1);
+			printf(" ");
 		}
 	}
 
 	if (use_newline) {
-		syscall_write(1, "\n", 1);
+		printf("\n");
 	}
 	return 0;
 }
-
-/*
- * vim:tabstop=4
- * vim:noexpandtab
- * vim:shiftwidth=4
- */

userspace/hello.c

@@ -0,0 +1,10 @@
+/* vim:tabstop=4 shiftwidth=4 noexpandtab
+ *
+ * Hello World!
+ */
+#include <stdio.h>
+
+int main(int argc, char ** argv) {
+	printf("Hello World!\n");
+	return 0;
+}

userspace/yes.c

@@ -0,0 +1,16 @@
+/* vim: tabstop=4 shiftwidth=4 noexpandtab
+ *
+ * yes
+ */
+#include <stdio.h>
+
+int main(int argc, char * argv[]) {
+	char * yes_string = "y";
+	if (argc > 1) {
+		yes_string = argv[1];
+	}
+	while (1) {
+		printf("%s\n", yes_string);
+	}
+	return 0;
+}