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lvm2/lib/misc/lvm-wrappers.c
Peter Rajnoha 06738cac05 Remove unsupported udev_get_dev_path libudev call used for checking udev dir.
With latest changes in the udev, some deprecated functions were removed
from libudev amongst which there was the "udev_get_dev_path" function
we used to compare a device directory used in udev and directore set in
libdevmapper. The "/dev" is hardcoded in udev now (udev version >= 183).

Amongst other changes and from packager's point of view, it's also
important to note that the libudev development library ("libudev-devel")
could now be a part of the systemd development library ("systemd-devel")
because of the udev + systemd merge.
2012-05-29 08:09:10 +00:00

120 lines
2.1 KiB
C

/*
* Copyright (C) 2006 Red Hat, Inc. All rights reserved.
*
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU Lesser General Public License v.2.1.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "lib.h"
#include <unistd.h>
#include <fcntl.h>
#ifdef UDEV_SYNC_SUPPORT
static const char _no_context_msg[] = "Udev library context not set.";
struct udev *_udev;
int udev_init_library_context(void)
{
if (_udev)
udev_unref(_udev);
if (!(_udev = udev_new())) {
log_error("Failed to create udev library context.");
return 0;
}
return 1;
}
void udev_fin_library_context(void)
{
udev_unref(_udev);
_udev = NULL;
}
int udev_is_running(void)
{
struct udev_queue *udev_queue;
int r;
if (!_udev) {
log_debug(_no_context_msg);
goto bad;
}
if (!(udev_queue = udev_queue_new(_udev))) {
log_debug("Could not get udev state.");
goto bad;
}
r = udev_queue_get_udev_is_active(udev_queue);
udev_queue_unref(udev_queue);
return r;
bad:
log_debug("Assuming udev is not running.");
return 0;
}
struct udev* udev_get_library_context(void)
{
return _udev;
}
#else /* UDEV_SYNC_SUPPORT */
int udev_init_library_context(void)
{
return 1;
}
void udev_fin_library_context(void)
{
}
int udev_is_running(void)
{
return 0;
}
#endif
int lvm_getpagesize(void)
{
return getpagesize();
}
int read_urandom(void *buf, size_t len)
{
int fd;
/* FIXME: we should stat here, and handle other cases */
/* FIXME: use common _io() routine's open/read/close */
if ((fd = open("/dev/urandom", O_RDONLY)) < 0) {
log_sys_error("open", "read_urandom: /dev/urandom");
return 0;
}
if (read(fd, buf, len) != (ssize_t) len) {
log_sys_error("read", "read_urandom: /dev/urandom");
if (close(fd))
stack;
return 0;
}
if (close(fd))
stack;
return 1;
}