file: fd_(set/get)flags()

kernel-src/fs/file.c

@@ -84,6 +84,34 @@ file_t *fd_get(int fd) {
 	return file;
 }
 
+int fd_setflags(int fd, int flags) {
+	int error = 0;
+	proc_t *proc = _cpu()->thread->proc;
+	MUTEX_ACQUIRE(&proc->fdmutex, false);
+
+	if (proc->fd[fd].file)
+		proc->fd[fd].flags = flags;
+	else
+		error = EBADF;
+
+	MUTEX_RELEASE(&proc->fdmutex);
+	return error;
+}
+
+int fd_getflags(int fd, int *flags) {
+	int error = 0;
+	proc_t *proc = _cpu()->thread->proc;
+	MUTEX_ACQUIRE(&proc->fdmutex, false);
+
+	if (proc->fd[fd].file)
+		*flags = proc->fd[fd].flags;
+	else
+		error = EBADF;
+
+	MUTEX_RELEASE(&proc->fdmutex);
+	return error;
+}
+
 void fd_release(file_t *file) {
 	FILE_RELEASE(file);
 }

kernel-src/include/kernel/file.h

@@ -26,6 +26,8 @@ int fd_new(int flags, file_t **file, int *fd);
 int fd_close(int fd);
 int fd_dup(int oldfd, int newfd, bool exact, int flags, int *ret);
 int fd_clone(proc_t *proc);
+int fd_setflags(int fd, int flags);
+int fd_getflags(int fd, int *flags);
 
 #define FILE_LOCK(x) MUTEX_ACQUIRE(&(x)->mutex, false)
 #define FILE_UNLOCK(x) MUTEX_RELEASE(&(x)->mutex)

kernel-src/sys/syscalls/fcntl.c

@@ -42,9 +42,14 @@ syscallret_t syscall_fcntl(context_t *, int fd, int cmd, uint64_t arg) {
 			FILE_UNLOCK(file);
 			break;
 		case F_SETFD:
-		case F_GETFD: // TODO implement this
+			ret.errno = fd_setflags(fd, arg);
 			ret.ret = 0;
 			break;
+		case F_GETFD:
+			int flg;
+			ret.errno = fd_getflags(fd, &flg);
+			ret.ret = flg;
+			break;
 		default:
 			ret.errno = EINVAL;
 			goto cleanup;
@@ -52,6 +57,8 @@ syscallret_t syscall_fcntl(context_t *, int fd, int cmd, uint64_t arg) {
 	ret.errno = 0;
 
 	cleanup:
+	ret.ret = ret.errno ? -1 : ret.ret;
+
 	fd_release(file);
 	return ret;
 }