Mon 14 Oct 23:09:15 CEST 2024

user/test/open.c

@@ -0,0 +1,31 @@
+/*
+Copyright (C) 2016-2019 The University of Notre Dame
+This software is distributed under the GNU General Public License.
+See the file LICENSE for details.
+*/
+
+#include "library/syscalls.h"
+#include "library/string.h"
+#include "library/user-io.h"
+
+int main(int argc, char *argv[])
+{
+	syscall_chdir("/");
+	printf("got root\n");
+	int dir_fd = syscall_open_file("/", 0, 0);
+	syscall_object_set_tag(dir_fd, "ROOT");
+	printf("Opened root directory\n");
+	int fd = syscall_open_file("ROOT:/data/words", 0, 0);
+	char buffer[1000];
+	int n;
+	printf("reading file...\n");
+	while((n = syscall_object_read(fd, buffer, 100)) > 0) {
+		buffer[n] = 0;
+		printf("%s", buffer);
+		flush();
+	}
+	syscall_object_close(fd);
+	syscall_process_exit(0);
+
+	return 0;
+}