UDEV_MONITOR_FILTER_UPDATE(3)

💖 NAME 💖

okay bestie, this is the UDEV_MONITOR_FILTER_ADD_MATCH_SUBSYSTEM_DEVTYPE(3) page, and it’s giving “filter management era” ✨. The whole crew is udev_monitor_filter_update, udev_monitor_filter_remove, udev_monitor_filter_add_match_subsystem_devtype, and udev_monitor_filter_add_match_tag — and the official vibe is Modify filters 💅.

✨ SYNOPSIS ✨

First you grab the header, exactly like this:

#include <libudev.h>

Then these signatures, no cap:

int udev_monitor_filter_update(struct udev_monitor *udev_monitor);

int udev_monitor_filter_remove(struct udev_monitor *udev_monitor);

int
                                                           udev_monitor_filter_add_match_subsystem_devtype(struct udev_monitor *udev_monitor,
                                                           const char *subsystem,
                                                           const char *devtype);

int udev_monitor_filter_add_match_tag(struct udev_monitor *udev_monitor,
                                             const char *tag);

🫶 RETURN VALUE 🫶

On success, udev_monitor_filter_update(), udev_monitor_filter_remove(), udev_monitor_filter_add_match_subsystem_devtype(), and udev_monitor_filter_add_match_tag() return an integer greater than, or equal to, 0. That’s the “we ate” result 😌.

On failure, a negative error code is returned — yes, the flop signal 😭.

🦋 HISTORY 🦋

udev_monitor_filter_update(), udev_monitor_filter_remove(), udev_monitor_filter_add_match_subsystem_devtype(), and udev_monitor_filter_add_match_tag() were added in version 221. iconic from way back 💜.

🌈 SEE ALSO 🌈

These besties right here:

• udev_new(3)
• udev_device_new_from_syspath(3)
• udev_enumerate_new(3)
• udev_monitor_new_from_netlink(3)
• udev_monitor_receive_device(3)
• udev_list_entry(3)
• systemd(1)

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Source/version: systemd 261.3 🎀. The footer doesn’t show a date, so I’m not inventing one — no fake timestamp energy here, bestie 💅.