From 5ee81fbbaf5c6a3bbc583d37ce324cf8546dc9aa Mon Sep 17 00:00:00 2001 From: dianshi Date: Fri, 11 Mar 2022 15:58:03 +0000 Subject: Fix linux compilation --- src/os/linux_udev.c | 321 ---------------------------------------------------- 1 file changed, 321 deletions(-) delete mode 100644 src/os/linux_udev.c (limited to 'src/os/linux_udev.c') diff --git a/src/os/linux_udev.c b/src/os/linux_udev.c deleted file mode 100644 index 9ec9eb1..0000000 --- a/src/os/linux_udev.c +++ /dev/null @@ -1,321 +0,0 @@ -/* -*- Mode: C; c-basic-offset:8 ; indent-tabs-mode:t -*- */ -/* - * Linux usbfs backend for libusb - * Copyright (C) 2007-2009 Daniel Drake - * Copyright (c) 2001 Johannes Erdfelt - * Copyright (c) 2012-2013 Nathan Hjelm - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "libusbi.h" -#include "linux_usbfs.h" - -#include -#include -#include -#include -#include -#include -#include - -/* udev context */ -static struct udev *udev_ctx = NULL; -static int udev_monitor_fd = -1; -static usbi_event_t udev_control_event = USBI_INVALID_EVENT; -static struct udev_monitor *udev_monitor = NULL; -static pthread_t linux_event_thread; - -static void udev_hotplug_event(struct udev_device *udev_dev); -static void *linux_udev_event_thread_main(void *arg); - -int linux_udev_start_event_monitor(void) -{ - int r; - - assert(udev_ctx == NULL); - udev_ctx = udev_new(); - if (!udev_ctx) { - usbi_err(NULL, "could not create udev context"); - goto err; - } - - udev_monitor = udev_monitor_new_from_netlink(udev_ctx, "udev"); - if (!udev_monitor) { - usbi_err(NULL, "could not initialize udev monitor"); - goto err_free_ctx; - } - - r = udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device"); - if (r) { - usbi_err(NULL, "could not initialize udev monitor filter for \"usb\" subsystem"); - goto err_free_monitor; - } - - if (udev_monitor_enable_receiving(udev_monitor)) { - usbi_err(NULL, "failed to enable the udev monitor"); - goto err_free_monitor; - } - - udev_monitor_fd = udev_monitor_get_fd(udev_monitor); - -#if defined(FD_CLOEXEC) - /* Make sure the udev file descriptor is marked as CLOEXEC */ - r = fcntl(udev_monitor_fd, F_GETFD); - if (r == -1) { - usbi_err(NULL, "failed to get udev monitor fd flags, errno=%d", errno); - goto err_free_monitor; - } - if (!(r & FD_CLOEXEC)) { - if (fcntl(udev_monitor_fd, F_SETFD, r | FD_CLOEXEC) == -1) { - usbi_err(NULL, "failed to set udev monitor fd flags, errno=%d", errno); - goto err_free_monitor; - } - } -#endif - - /* Some older versions of udev are not non-blocking by default, - * so make sure this is set */ - r = fcntl(udev_monitor_fd, F_GETFL); - if (r == -1) { - usbi_err(NULL, "failed to get udev monitor fd status flags, errno=%d", errno); - goto err_free_monitor; - } - if (!(r & O_NONBLOCK)) { - if (fcntl(udev_monitor_fd, F_SETFL, r | O_NONBLOCK) == -1) { - usbi_err(NULL, "failed to set udev monitor fd status flags, errno=%d", errno); - goto err_free_monitor; - } - } - - r = usbi_create_event(&udev_control_event); - if (r) { - usbi_err(NULL, "failed to create udev control event"); - goto err_free_monitor; - } - - r = pthread_create(&linux_event_thread, NULL, linux_udev_event_thread_main, NULL); - if (r) { - usbi_err(NULL, "failed to create hotplug event thread (%d)", r); - goto err_destroy_event; - } - - return LIBUSB_SUCCESS; - -err_destroy_event: - usbi_destroy_event(&udev_control_event); - udev_control_event = (usbi_event_t)USBI_INVALID_EVENT; -err_free_monitor: - udev_monitor_unref(udev_monitor); - udev_monitor = NULL; - udev_monitor_fd = -1; -err_free_ctx: - udev_unref(udev_ctx); -err: - udev_ctx = NULL; - return LIBUSB_ERROR_OTHER; -} - -int linux_udev_stop_event_monitor(void) -{ - int r; - - assert(udev_ctx != NULL); - assert(udev_monitor != NULL); - assert(udev_monitor_fd != -1); - - /* Signal the control event and wait for the thread to exit */ - usbi_signal_event(&udev_control_event); - - r = pthread_join(linux_event_thread, NULL); - if (r) - usbi_warn(NULL, "failed to join hotplug event thread (%d)", r); - - usbi_destroy_event(&udev_control_event); - udev_control_event = (usbi_event_t)USBI_INVALID_EVENT; - - /* Release the udev monitor */ - udev_monitor_unref(udev_monitor); - udev_monitor = NULL; - udev_monitor_fd = -1; - - /* Clean up the udev context */ - udev_unref(udev_ctx); - udev_ctx = NULL; - - return LIBUSB_SUCCESS; -} - -static void *linux_udev_event_thread_main(void *arg) -{ - struct pollfd fds[] = { - { .fd = USBI_EVENT_OS_HANDLE(&udev_control_event), - .events = USBI_EVENT_POLL_EVENTS }, - { .fd = udev_monitor_fd, - .events = POLLIN }, - }; - struct udev_device *udev_dev; - int r; - - UNUSED(arg); - -#if defined(HAVE_PTHREAD_SETNAME_NP) - r = pthread_setname_np(pthread_self(), "libusb_event"); - if (r) - usbi_warn(NULL, "failed to set hotplug event thread name, error=%d", r); -#endif - - usbi_dbg(NULL, "udev event thread entering"); - - while (1) { - r = poll(fds, 2, -1); - if (r == -1) { - /* check for temporary failure */ - if (errno == EINTR) - continue; - usbi_err(NULL, "poll() failed, errno=%d", errno); - break; - } - if (fds[0].revents) { - /* activity on control event, exit */ - break; - } - if (fds[1].revents) { - usbi_mutex_static_lock(&linux_hotplug_lock); - udev_dev = udev_monitor_receive_device(udev_monitor); - if (udev_dev) - udev_hotplug_event(udev_dev); - usbi_mutex_static_unlock(&linux_hotplug_lock); - } - } - - usbi_dbg(NULL, "udev event thread exiting"); - - return NULL; -} - -static int udev_device_info(struct libusb_context *ctx, int detached, - struct udev_device *udev_dev, uint8_t *busnum, - uint8_t *devaddr, const char **sys_name) { - const char *dev_node; - - dev_node = udev_device_get_devnode(udev_dev); - if (!dev_node) { - return LIBUSB_ERROR_OTHER; - } - - *sys_name = udev_device_get_sysname(udev_dev); - if (!*sys_name) { - return LIBUSB_ERROR_OTHER; - } - - return linux_get_device_address(ctx, detached, busnum, devaddr, - dev_node, *sys_name, -1); -} - -static void udev_hotplug_event(struct udev_device *udev_dev) -{ - const char *udev_action; - const char *sys_name = NULL; - uint8_t busnum = 0, devaddr = 0; - int detached; - int r; - - do { - udev_action = udev_device_get_action(udev_dev); - if (!udev_action) { - break; - } - - detached = !strncmp(udev_action, "remove", 6); - - r = udev_device_info(NULL, detached, udev_dev, &busnum, &devaddr, &sys_name); - if (LIBUSB_SUCCESS != r) { - break; - } - - usbi_dbg(NULL, "udev hotplug event. action: %s.", udev_action); - - if (strncmp(udev_action, "add", 3) == 0) { - linux_hotplug_enumerate(busnum, devaddr, sys_name); - } else if (detached) { - linux_device_disconnected(busnum, devaddr); - } else if (strncmp(udev_action, "bind", 4) == 0) { - /* silently ignore "known unhandled" action */ - } else { - usbi_err(NULL, "ignoring udev action %s", udev_action); - } - } while (0); - - udev_device_unref(udev_dev); -} - -int linux_udev_scan_devices(struct libusb_context *ctx) -{ - struct udev_enumerate *enumerator; - struct udev_list_entry *devices, *entry; - struct udev_device *udev_dev; - const char *sys_name; - int r; - - assert(udev_ctx != NULL); - - enumerator = udev_enumerate_new(udev_ctx); - if (NULL == enumerator) { - usbi_err(ctx, "error creating udev enumerator"); - return LIBUSB_ERROR_OTHER; - } - - udev_enumerate_add_match_subsystem(enumerator, "usb"); - udev_enumerate_add_match_property(enumerator, "DEVTYPE", "usb_device"); - udev_enumerate_scan_devices(enumerator); - devices = udev_enumerate_get_list_entry(enumerator); - - entry = NULL; - udev_list_entry_foreach(entry, devices) { - const char *path = udev_list_entry_get_name(entry); - uint8_t busnum = 0, devaddr = 0; - - udev_dev = udev_device_new_from_syspath(udev_ctx, path); - - r = udev_device_info(ctx, 0, udev_dev, &busnum, &devaddr, &sys_name); - if (r) { - udev_device_unref(udev_dev); - continue; - } - - linux_enumerate_device(ctx, busnum, devaddr, sys_name); - udev_device_unref(udev_dev); - } - - udev_enumerate_unref(enumerator); - - return LIBUSB_SUCCESS; -} - -void linux_udev_hotplug_poll(void) -{ - struct udev_device *udev_dev; - - usbi_mutex_static_lock(&linux_hotplug_lock); - do { - udev_dev = udev_monitor_receive_device(udev_monitor); - if (udev_dev) { - usbi_dbg(NULL, "Handling hotplug event from hotplug_poll"); - udev_hotplug_event(udev_dev); - } - } while (udev_dev); - usbi_mutex_static_unlock(&linux_hotplug_lock); -} -- cgit v1.2.3