--- /dev/null
+/* libguestfs - the guestfsd daemon
+ * Copyright (C) 2009 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 <unistd.h>
+
+#ifdef HAVE_ATTR_XATTR_H
+#include <attr/xattr.h>
+
+#include "../src/guestfs_protocol.h"
+#include "daemon.h"
+#include "actions.h"
+
+static guestfs_int_xattr_list *getxattrs (char *path, ssize_t (*listxattr) (const char *path, char *list, size_t size), ssize_t (*getxattr) (const char *path, const char *name, void *value, size_t size));
+static int _setxattr (char *xattr, char *val, int vallen, char *path, int (*setxattr) (const char *path, const char *name, const void *value, size_t size, int flags));
+static int _removexattr (char *xattr, char *path, int (*removexattr) (const char *path, const char *name));
+
+guestfs_int_xattr_list *
+do_getxattrs (char *path)
+{
+#if defined(HAVE_LISTXATTR) && defined(HAVE_GETXATTR)
+ return getxattrs (path, listxattr, getxattr);
+#else
+ reply_with_error ("getxattrs: no support for listxattr and getxattr");
+ return NULL;
+#endif
+}
+
+guestfs_int_xattr_list *
+do_lgetxattrs (char *path)
+{
+#if defined(HAVE_LLISTXATTR) && defined(HAVE_LGETXATTR)
+ return getxattrs (path, llistxattr, lgetxattr);
+#else
+ reply_with_error ("lgetxattrs: no support for llistxattr and lgetxattr");
+ return NULL;
+#endif
+}
+
+int
+do_setxattr (char *xattr, char *val, int vallen, char *path)
+{
+#if defined(HAVE_SETXATTR)
+ return _setxattr (xattr, val, vallen, path, setxattr);
+#else
+ reply_with_error ("setxattr: no support for setxattr");
+ return -1;
+#endif
+}
+
+int
+do_lsetxattr (char *xattr, char *val, int vallen, char *path)
+{
+#if defined(HAVE_LSETXATTR)
+ return _setxattr (xattr, val, vallen, path, lsetxattr);
+#else
+ reply_with_error ("lsetxattr: no support for lsetxattr");
+ return -1;
+#endif
+}
+
+int
+do_removexattr (char *xattr, char *path)
+{
+#if defined(HAVE_REMOVEXATTR)
+ return _removexattr (xattr, path, removexattr);
+#else
+ reply_with_error ("removexattr: no support for removexattr");
+ return -1;
+#endif
+}
+
+int
+do_lremovexattr (char *xattr, char *path)
+{
+#if defined(HAVE_LREMOVEXATTR)
+ return _removexattr (xattr, path, lremovexattr);
+#else
+ reply_with_error ("lremovexattr: no support for lremovexattr");
+ return -1;
+#endif
+}
+
+static guestfs_int_xattr_list *
+getxattrs (char *path,
+ ssize_t (*listxattr) (const char *path, char *list, size_t size),
+ ssize_t (*getxattr) (const char *path, const char *name,
+ void *value, size_t size))
+{
+ ssize_t len, vlen;
+ char *buf = NULL;
+ int i, j;
+ guestfs_int_xattr_list *r = NULL;
+
+ NEED_ROOT (NULL);
+ ABS_PATH (path, NULL);
+
+ CHROOT_IN;
+ len = listxattr (path, NULL, 0);
+ CHROOT_OUT;
+ if (len == -1) {
+ reply_with_perror ("listxattr");
+ goto error;
+ }
+
+ buf = malloc (len);
+ if (buf == NULL) {
+ reply_with_perror ("malloc");
+ goto error;
+ }
+
+ CHROOT_IN;
+ len = listxattr (path, buf, len);
+ CHROOT_OUT;
+ if (len == -1) {
+ reply_with_perror ("listxattr");
+ goto error;
+ }
+
+ r = calloc (1, sizeof (*r));
+ if (r == NULL) {
+ reply_with_perror ("malloc");
+ goto error;
+ }
+
+ /* What we get from the kernel is a string "foo\0bar\0baz" of length
+ * len. First count the strings.
+ */
+ r->guestfs_int_xattr_list_len = 0;
+ for (i = 0; i < len; i += strlen (&buf[i]) + 1)
+ r->guestfs_int_xattr_list_len++;
+
+ r->guestfs_int_xattr_list_val =
+ calloc (r->guestfs_int_xattr_list_len, sizeof (guestfs_int_xattr));
+ if (r->guestfs_int_xattr_list_val == NULL) {
+ reply_with_perror ("calloc");
+ goto error;
+ }
+
+ for (i = 0, j = 0; i < len; i += strlen (&buf[i]) + 1, ++j) {
+ CHROOT_IN;
+ vlen = getxattr (path, &buf[i], NULL, 0);
+ CHROOT_OUT;
+ if (vlen == -1) {
+ reply_with_perror ("getxattr");
+ goto error;
+ }
+
+ r->guestfs_int_xattr_list_val[j].attrname = strdup (&buf[i]);
+ r->guestfs_int_xattr_list_val[j].attrval.attrval_val = malloc (vlen);
+ r->guestfs_int_xattr_list_val[j].attrval.attrval_len = vlen;
+
+ if (r->guestfs_int_xattr_list_val[j].attrname == NULL ||
+ r->guestfs_int_xattr_list_val[j].attrval.attrval_val == NULL) {
+ reply_with_perror ("malloc");
+ goto error;
+ }
+
+ CHROOT_IN;
+ vlen = getxattr (path, &buf[i],
+ r->guestfs_int_xattr_list_val[j].attrval.attrval_val,
+ vlen);
+ CHROOT_OUT;
+ if (vlen == -1) {
+ reply_with_perror ("getxattr");
+ goto error;
+ }
+ }
+
+ free (buf);
+
+ return r;
+
+ error:
+ free (buf);
+ if (r) {
+ if (r->guestfs_int_xattr_list_val)
+ for (i = 0; i < r->guestfs_int_xattr_list_len; ++i) {
+ free (r->guestfs_int_xattr_list_val[i].attrname);
+ free (r->guestfs_int_xattr_list_val[i].attrval.attrval_val);
+ }
+ free (r->guestfs_int_xattr_list_val);
+ }
+ free (r);
+ return NULL;
+}
+
+static int
+_setxattr (char *xattr, char *val, int vallen, char *path,
+ int (*setxattr) (const char *path, const char *name,
+ const void *value, size_t size, int flags))
+{
+ int r;
+
+ CHROOT_IN;
+ r = setxattr (path, xattr, val, vallen, 0);
+ CHROOT_OUT;
+ if (r == -1) {
+ reply_with_perror ("setxattr");
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+_removexattr (char *xattr, char *path,
+ int (*removexattr) (const char *path, const char *name))
+{
+ int r;
+
+ CHROOT_IN;
+ r = removexattr (path, xattr);
+ CHROOT_OUT;
+ if (r == -1) {
+ reply_with_perror ("removexattr");
+ return -1;
+ }
+
+ return 0;
+}
+
+#else /* !HAVE_ATTR_XATTR_H */
+
+guestfs_int_xattr_list *
+do_getxattrs (char *path)
+{
+ reply_with_error ("getxattrs: no support for xattrs");
+ return NULL;
+}
+
+guestfs_int_xattr_list *
+do_lgetxattrs (char *path)
+{
+ reply_with_error ("lgetxattrs: no support for xattrs");
+ return NULL;
+}
+
+int
+do_setxattr (char *xattr, char *val, int vallen, char *path)
+{
+ reply_with_error ("setxattr: no support for xattrs");
+ return -1;
+}
+
+int
+do_lsetxattr (char *xattr, char *val, int vallen, char *path)
+{
+ reply_with_error ("lsetxattr: no support for xattrs");
+ return -1;
+}
+
+int
+do_removexattr (char *xattr, char *path)
+{
+ reply_with_error ("removexattr: no support for xattrs");
+ return -1;
+}
+
+int
+do_lremovexattr (char *xattr, char *path)
+{
+ reply_with_error ("lremovexattr: no support for xattrs");
+ return -1;
+}
+
+#endif /* !HAVE_ATTR_XATTR_H */
git.annexia.org / libguestfs.git / blobdiff