Add ioctl() and reimplement tcsetpgrp/tcsetpgrp as ioctls.

LibC/Makefile

@@ -30,6 +30,7 @@ LIBC_OBJS = \
        termios.o \
        ulimit.o \
        qsort.o \
+       ioctl.o \
        entry.o
 
 OBJS = $(AK_OBJS) $(LIBC_OBJS)

LibC/ioctl.cpp

@@ -0,0 +1,19 @@
+#include <errno.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <Kernel/Syscall.h>
+
+extern "C" {
+
+int ioctl(int fd, unsigned request, ...)
+{
+    va_list ap;
+    va_start(ap, request);
+    unsigned arg = va_arg(ap, unsigned);
+    int rc = Syscall::invoke(Syscall::SC_ioctl, (dword)fd, (dword)request, (dword)arg);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+}
+

LibC/stdarg.h

@@ -4,11 +4,11 @@
 
 __BEGIN_DECLS
 
-typedef char* va_list;
+typedef __builtin_va_list va_list;
 
-#define va_start(ap, v) ap = (va_list)&v + sizeof(v)
-#define va_arg(ap, t) ((t*)(ap += sizeof(t)))[-1]
-#define va_end(ap) ap = nullptr
+#define va_start(v, l) __builtin_va_start(v, l)
+#define va_end(v) __builtin_va_end(v)
+#define va_arg(v, l) __builtin_va_arg(v, l)
 
 __END_DECLS
 

LibC/sys/ioctl.h

@@ -0,0 +1,10 @@
+#pragma once
+
+#include <sys/cdefs.h>
+#include <sys/ioctl_numbers.h>
+
+__BEGIN_DECLS
+
+int ioctl(int fd, unsigned request, ...);
+
+__END_DECLS

LibC/sys/ioctl_numbers.h

@@ -0,0 +1,7 @@
+#pragma once
+
+enum IOCtlNumber {
+    TIOCGPGRP,
+    TIOCSPGRP,
+};
+

LibC/termcap.cpp

@@ -108,6 +108,7 @@ char* tgoto(const char* cap, int col, int row)
 int tputs(const char* str, int affcnt, int (*putc)(int))
 {
     printf("%s", str);
+    return 0;
 }
 
 }

LibC/unistd.cpp

@@ -6,6 +6,7 @@
 #include <grp.h>
 #include <pwd.h>
 #include <stdio.h>
+#include <sys/ioctl.h>
 #include <Kernel/Syscall.h>
 
 extern "C" {
@@ -60,14 +61,12 @@ pid_t setsid()
 
 pid_t tcgetpgrp(int fd)
 {
-    int rc = Syscall::invoke(Syscall::SC_tcgetpgrp, (dword)fd);
-    __RETURN_WITH_ERRNO(rc, rc, -1);
+    return ioctl(fd, TIOCGPGRP);
 }
 
 int tcsetpgrp(int fd, pid_t pgid)
 {
-    int rc = Syscall::invoke(Syscall::SC_tcsetpgrp, (dword)fd, (dword)pgid);
-    __RETURN_WITH_ERRNO(rc, rc, -1);
+    return ioctl(fd, TIOCSPGRP, pgid);
 }
 
 int setpgid(pid_t pid, pid_t pgid)