--- /dev/null
+/* libguestfs - the guestfsd daemon
+ * Copyright (C) 2011 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+
+#include "guestfs_protocol.h"
+#include "daemon.h"
+#include "actions.h"
+
+#define DEST_FILE_FLAGS O_WRONLY|O_CREAT|O_TRUNC|O_NOCTTY, 0666
+#define DEST_DEVICE_FLAGS O_WRONLY, 0
+
+/* NB: We cheat slightly by assuming that optargs_bitmask is
+ * compatible for all four of the calls. This is true provided they
+ * all take the same set of optional arguments.
+ */
+
+/* Takes optional arguments, consult optargs_bitmask. */
+static int
+copy (const char *src, const char *src_display,
+ const char *dest, const char *dest_display,
+ int wrflags, int wrmode,
+ int64_t srcoffset, int64_t destoffset, int64_t size)
+{
+ int64_t saved_size = size;
+ int src_fd, dest_fd;
+ char buf[BUFSIZ];
+ size_t n;
+ ssize_t r;
+
+ if ((optargs_bitmask & GUESTFS_COPY_DEVICE_TO_DEVICE_SRCOFFSET_BITMASK)) {
+ if (srcoffset < 0) {
+ reply_with_error ("srcoffset is negative");
+ return -1;
+ }
+ }
+ else
+ srcoffset = 0;
+
+ if ((optargs_bitmask & GUESTFS_COPY_DEVICE_TO_DEVICE_DESTOFFSET_BITMASK)) {
+ if (destoffset < 0) {
+ reply_with_error ("destoffset is negative");
+ return -1;
+ }
+ }
+ else
+ destoffset = 0;
+
+ if ((optargs_bitmask & GUESTFS_COPY_DEVICE_TO_DEVICE_SIZE_BITMASK)) {
+ if (size < 0) {
+ reply_with_error ("size is negative");
+ return -1;
+ }
+ }
+ else
+ size = -1;
+
+ /* Open source and destination. */
+ src_fd = open (src, O_RDONLY);
+ if (src_fd == -1) {
+ reply_with_perror ("%s", src_display);
+ return -1;
+ }
+
+ if (srcoffset > 0 && lseek (src_fd, srcoffset, SEEK_SET) == (off_t) -1) {
+ reply_with_perror ("lseek: %s", src_display);
+ close (src_fd);
+ return -1;
+ }
+
+ dest_fd = open (dest, wrflags, wrmode);
+ if (dest_fd == -1) {
+ reply_with_perror ("%s", dest_display);
+ close (src_fd);
+ return -1;
+ }
+
+ if (destoffset > 0 && lseek (dest_fd, destoffset, SEEK_SET) == (off_t) -1) {
+ reply_with_perror ("lseek: %s", dest_display);
+ close (src_fd);
+ close (dest_fd);
+ return -1;
+ }
+
+ if (size == -1)
+ pulse_mode_start ();
+
+ while (size != 0) {
+ /* Calculate bytes to copy. */
+ if (size == -1 || size > (int64_t) sizeof buf)
+ n = sizeof buf;
+ else
+ n = size;
+
+ r = read (src_fd, buf, n);
+ if (r == -1) {
+ if (size == -1)
+ pulse_mode_cancel ();
+ reply_with_perror ("read: %s", src_display);
+ close (src_fd);
+ close (dest_fd);
+ return -1;
+ }
+
+ if (r == 0) {
+ if (size == -1) /* if size == -1, this is normal end of loop */
+ break;
+ reply_with_error ("%s: input too short", src_display);
+ close (src_fd);
+ close (dest_fd);
+ return -1;
+ }
+
+ if (xwrite (dest_fd, buf, r) == -1) {
+ if (size == -1)
+ pulse_mode_cancel ();
+ reply_with_perror ("%s: write", dest_display);
+ close (src_fd);
+ close (dest_fd);
+ return -1;
+ }
+
+ if (size != -1) {
+ size -= r;
+ notify_progress ((uint64_t) (saved_size - size), (uint64_t) saved_size);
+ }
+ }
+
+ if (size == -1)
+ pulse_mode_end ();
+
+ if (close (src_fd) == -1) {
+ reply_with_perror ("close: %s", src_display);
+ close (dest_fd);
+ return -1;
+ }
+
+ if (close (dest_fd) == -1) {
+ reply_with_perror ("close: %s", dest_display);
+ return -1;
+ }
+
+ return 0;
+}
+
+int
+do_copy_device_to_device (const char *src, const char *dest,
+ int64_t srcoffset, int64_t destoffset, int64_t size)
+{
+ return copy (src, src, dest, dest, DEST_DEVICE_FLAGS,
+ srcoffset, destoffset, size);
+}
+
+int
+do_copy_device_to_file (const char *src, const char *dest,
+ int64_t srcoffset, int64_t destoffset, int64_t size)
+{
+ char *dest_buf;
+ int r;
+
+ dest_buf = sysroot_path (dest);
+ if (!dest_buf) {
+ reply_with_perror ("malloc");
+ return -1;
+ }
+
+ r = copy (src, src, dest_buf, dest, DEST_FILE_FLAGS,
+ srcoffset, destoffset, size);
+ free (dest_buf);
+
+ return r;
+}
+
+int
+do_copy_file_to_device (const char *src, const char *dest,
+ int64_t srcoffset, int64_t destoffset, int64_t size)
+{
+ char *src_buf;
+ int r;
+
+ src_buf = sysroot_path (src);
+ if (!src_buf) {
+ reply_with_perror ("malloc");
+ return -1;
+ }
+
+ r = copy (src_buf, src, dest, dest, DEST_DEVICE_FLAGS,
+ srcoffset, destoffset, size);
+ free (src_buf);
+
+ return r;
+}
+
+int
+do_copy_file_to_file (const char *src, const char *dest,
+ int64_t srcoffset, int64_t destoffset, int64_t size)
+{
+ char *src_buf, *dest_buf;
+ int r;
+
+ src_buf = sysroot_path (src);
+ if (!src_buf) {
+ reply_with_perror ("malloc");
+ return -1;
+ }
+
+ dest_buf = sysroot_path (dest);
+ if (!dest_buf) {
+ reply_with_perror ("malloc");
+ free (src_buf);
+ return -1;
+ }
+
+ r = copy (src_buf, src, dest_buf, dest, DEST_FILE_FLAGS,
+ srcoffset, destoffset, size);
+ free (src_buf);
+ free (dest_buf);
+
+ return r;
+}
git.annexia.org / libguestfs.git / blobdiff