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NAME | SYNOPSIS | RETURN VALUE | HISTORY | SEE ALSO | COLOPHON |
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UDEV_DEV...T_SYSPATH(3) udev_device_get_syspath UDEV_DEV...T_SYSPATH(3)
udev_device_get_syspath, udev_device_get_sysname,
udev_device_get_sysnum, udev_device_get_devpath,
udev_device_get_devnode, udev_device_get_devnum,
udev_device_get_devtype, udev_device_get_subsystem,
udev_device_get_driver, udev_device_get_udev,
udev_device_get_parent,
udev_device_get_parent_with_subsystem_devtype,
udev_device_get_is_initialized, udev_device_get_action - Query
device properties
#include <libudev.h>
const char
*udev_device_get_syspath(struct udev_device *udev_device);
const char
*udev_device_get_sysname(struct udev_device *udev_device);
const char
*udev_device_get_sysnum(struct udev_device *udev_device);
const char
*udev_device_get_devpath(struct udev_device *udev_device);
const char
*udev_device_get_devnode(struct udev_device *udev_device);
dev_t udev_device_get_devnum(struct udev_device *udev_device);
const char
*udev_device_get_devtype(struct udev_device *udev_device);
const char
*udev_device_get_subsystem(struct udev_device *udev_device);
const char
*udev_device_get_driver(struct udev_device *udev_device);
struct udev
*udev_device_get_udev(struct udev_device *udev_device);
struct udev_device
*udev_device_get_parent(struct udev_device *udev_device);
struct udev_device
*udev_device_get_parent_with_subsystem_devtype(struct udev_device *udev_device,
const char *subsystem,
const char *devtype);
int
udev_device_get_is_initialized(struct udev_device *udev_device);
const char
*udev_device_get_action(struct udev_device *udev_device);
On success, udev_device_get_syspath(), udev_device_get_sysname(),
udev_device_get_sysnum(), udev_device_get_devpath(),
udev_device_get_devnode(), udev_device_get_devtype(),
udev_device_get_subsystem(), udev_device_get_driver() and
udev_device_get_action() return a pointer to a constant string
that describes the requested property. The lifetime of this
string is bound to the device it was requested on. On failure,
each function may return NULL.
On success, udev_device_get_devnum() returns the device type of
the passed device. On failure, a device type with minor and major
number set to 0 is returned.
udev_device_get_udev() always returns a valid pointer to the udev
context that this device belongs to.
On success, udev_device_get_parent() and
udev_device_get_parent_with_subsystem_devtype() return a pointer
to the parent device. No additional reference to this device is
acquired, but the child device owns a reference to such a parent
device. On failure, NULL is returned.
On success, udev_device_get_is_initialized() returns either 1 or
0, depending on whether the passed device has already been
initialized by udev or not. On failure, a negative error code is
returned. Note that devices for which no udev rules are defined
are never reported initialized.
udev_device_get_syspath(), udev_device_get_sysname(),
udev_device_get_sysnum(), udev_device_get_devpath(),
udev_device_get_devnode(), udev_device_get_devnum(),
udev_device_get_devtype(), udev_device_get_subsystem(),
udev_device_get_driver(), udev_device_get_udev(),
udev_device_get_parent(),
udev_device_get_parent_with_subsystem_devtype(),
udev_device_get_is_initialized(), and udev_device_get_action()
were added in version 221.
udev_new(3), udev_device_new_from_syspath(3),
udev_device_has_tag(3), udev_enumerate_new(3),
udev_monitor_new_from_netlink(3), udev_list_entry(3), systemd(1)
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have
a bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-13.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
systemd 257~devel UDEV_DEV...T_SYSPATH(3)
Pages that refer to this page: udev_device_has_tag(3), udev_device_new_from_syspath(3), systemd.directives(7), systemd.index(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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