Module Name: src
Committed By: pooka
Date: Mon Oct 5 13:05:31 UTC 2009
Added Files:
src/share/examples/rump/sdread: Makefile sdread.c
Log Message:
Add an example program which shows how to mount and read files from
an msdos file system which is located on a usb stick. What makes
this special is that the USB driver stack (and the file system
driver, of course) is run in rump instead of in the host kernel.
To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/share/examples/rump/sdread/Makefile \
src/share/examples/rump/sdread/sdread.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Added files:
Index: src/share/examples/rump/sdread/Makefile
diff -u /dev/null src/share/examples/rump/sdread/Makefile:1.1
--- /dev/null Mon Oct 5 13:05:31 2009
+++ src/share/examples/rump/sdread/Makefile Mon Oct 5 13:05:31 2009
@@ -0,0 +1,14 @@
+# $NetBSD: Makefile,v 1.1 2009/10/05 13:05:31 pooka Exp $
+#
+
+PROG= sdread
+
+LDADD+= -lrumpfs_msdos -lrumpvfs
+LDADD+= -lrumpdev_disk -lrumpdev_usb -lrumpdev_usbhc -lrumpdev_umass -lrumpdev
+LDADD+= -lrump
+LDADD+= -lrumpuser -lpthread
+
+DBG= -g
+NOMAN=
+
+.include <bsd.prog.mk>
Index: src/share/examples/rump/sdread/sdread.c
diff -u /dev/null src/share/examples/rump/sdread/sdread.c:1.1
--- /dev/null Mon Oct 5 13:05:31 2009
+++ src/share/examples/rump/sdread/sdread.c Mon Oct 5 13:05:31 2009
@@ -0,0 +1,138 @@
+/* $NetBSD: sdread.c,v 1.1 2009/10/05 13:05:31 pooka Exp $ */
+
+/*
+ * Copyright (c) 2009 Antti Kantee. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/types.h>
+#include <sys/dirent.h>
+#include <sys/mount.h>
+
+#include <msdosfs/msdosfsmount.h>
+
+#include <rump/rump.h>
+#include <rump/rump_syscalls.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/*
+ * Proof-of-concept program:
+ *
+ * Mount rump file system from device driver stack included in the
+ * rump kernel. Optionally copy a file out of the mounted file system.
+ */
+
+int
+main(int argc, char *argv[])
+{
+ char buf[2048];
+ struct msdosfs_args args;
+ struct dirent *dp;
+ const char *msg = NULL;
+ int fd, n, fd_h, sverrno;
+
+ if (argc > 1 && argc != 3) {
+ fprintf(stderr, "usage: a.out [src hostdest]\n");
+ exit(1);
+ }
+
+ memset(&args, 0, sizeof(args));
+ args.fspec = strdup("/dev/sd0e");
+ args.version = MSDOSFSMNT_VERSION;
+
+ rump_init();
+
+ if (rump_sys_mkdir("/mp", 0777) == -1)
+ err(1, "mkdir");
+ if (rump_sys_mount(MOUNT_MSDOS, "/mp", MNT_RDONLY,
+ &args, sizeof(args)) == -1)
+ err(1, "mount");
+
+ fd = rump_sys_open("/mp", O_RDONLY, 0);
+ if (fd == -1) {
+ msg = "open dir";
+ goto out;
+ }
+
+ while ((n = rump_sys_getdents(fd, buf, sizeof(buf))) > 0) {
+ for (dp = (struct dirent *)buf;
+ (char *)dp - buf < n;
+ dp = _DIRENT_NEXT(dp)) {
+ printf("%" PRIu64 ": %s\n", dp->d_fileno, dp->d_name);
+ }
+ }
+ rump_sys_close(fd);
+ if (argc == 1)
+ goto out;
+
+ rump_sys_chdir("/mp");
+ fd = rump_sys_open(argv[1], O_RDONLY, 0);
+ if (fd == -1) {
+ msg = "open fs file";
+ goto out;
+ }
+
+ fd_h = open(argv[2], O_RDWR | O_CREAT, 0777);
+ if (fd_h == -1) {
+ msg = "open host file";
+ goto out;
+ }
+
+ while ((n = rump_sys_read(fd, buf, sizeof(buf))) == sizeof(buf)) {
+ if (write(fd_h, buf, sizeof(buf)) != sizeof(buf)) {
+ msg = "write host file";
+ goto out;
+ }
+ }
+ if (n == -1) {
+ msg = "read fs file";
+ goto out;
+ }
+
+ if (n > 0) {
+ if (write(fd_h, buf, n) == -1)
+ msg = "write tail";
+ }
+
+ out:
+ sverrno = errno;
+ rump_sys_chdir("/");
+ rump_sys_close(fd);
+ close(fd_h);
+ if (rump_sys_unmount("/mp", 0) == -1)
+ err(1, "unmount");
+
+ if (msg) {
+ errno = sverrno;
+ err(1, "%s", msg);
+ }
+
+ return 0;
+}
