新增app源码
目录
t113_linux/platform/apps/monitor_usb$ tree
.
├── Makefile
└── monitor_usb.c
monitor_usb.c
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <libudev.h>
#include <stdlib.h>
#include <sys/reboot.h>
/**
* swupdate ota
*/
void swupdate_ota() {
const char *filename = "/mnt/usb/sda1/update.swu";
int result = access(filename, F_OK);
if (result == 0) {
int response = system("swupdate -v -i /mnt/usb/sda1/update.swu -e stable,now_A_next_B");
if (response == -1) {
printf("Failed to execute swupdate command\n");
} else {
printf("Rebooting the device...\n");
sync();// 同步磁盘上的数据
if (reboot(RB_AUTOBOOT) == -1) {
printf("Failed to reboot the system\n");
}
}
} else {
printf("/mnt/usb/sda1/update.swu does not exits\n");
}
}
int main() {
struct udev *udev;
struct udev_monitor *mon;
struct udev_device *dev;
int fd;
/* 初始化 udev */
udev = udev_new();
if (!udev) {
fprintf(stderr, "Can't create udev\n");
return 1;
}
/* 创建 udev 监听器 */
mon = udev_monitor_new_from_netlink(udev, "udev");
if (!mon) {
fprintf(stderr, "Can't create udev monitor\n");
return 1;
}
/* 设置要监听的事件类型 */
if (udev_monitor_filter_add_match_subsystem_devtype(mon, "block", "disk") < 0 ||
udev_monitor_enable_receiving(mon) < 0) {
fprintf(stderr, "Can't filter block subsystem or enable receiving\n");
return 1;
}
// 获取文件描述符
fd = udev_monitor_get_fd(mon);
/* 循环监听并处理事件 */
while (1) {
// 使用 select 系统调用来等待设备事件或超时
fd_set fds;
FD_ZERO(&fds);
FD_SET(fd, &fds);
struct timeval timeout;
timeout.tv_sec = 5; // 设置超时时间为 5 秒
timeout.tv_usec = 0;
// 使用 select() 设置超时时间
if (select(fd + 1, &fds, NULL, NULL, &timeout) < 0) {
printf("Error waiting for device event\n");
continue;
}
if (FD_ISSET(fd, &fds)) {
// 当设备事件发生时，从监视器接收设备对象
dev = udev_monitor_receive_device(mon);
if (dev == NULL) {
printf("Invalid device received from udev monitor\n");
continue;
}
const char *action = udev_device_get_action(dev);
const char *devpath = udev_device_get_devnode(dev);
printf("Action: %s, Device Path: %s\n", action, devpath);
if (strcmp("add", action) == 0) {
swupdate_ota();
}
udev_device_unref(dev);
} else {
// 没有设备事件发生
// printf("No device events received\n");
}
}
/* 清理资源 */
udev_monitor_unref(mon);
udev_unref(udev);
return 0;
}
Makefile
OBJS = monitor_usb.o
OUT_BIN = monitor_usb
all:$(OBJS)
$(CC) $(LDFLAGS) -g -o $(OUT_BIN) $^
%.o: %.c
$(CC) $(CFLAGS) -c -o $@ $<
.PHONY: clean
clean:
rm -rf *.o
rm -rf $(OUT_BIN)
rm -rf $(shell find -name "*.d")
buildroot 配置
目录
t113_linux/platform/config/buildroot/monitor_usb$ tree
.
├── Config.in
└── monitor_usb.mk
Config.in
config BR2_PACKAGE_MONITOR_USB
bool "monitor_usb"
select BR2_PACKAGE_EUDEV
help
monitor usb
monitor_usb.mk
################################################################################
#
# monitor usb
#
################################################################################
MONITOR_USB_SITE_METHOD = local
MONITOR_USB_SITE = $(PLATFORM_PATH)/../../apps/monitor_usb
MONITOR_USB_LICENSE = GPLv2+, GPLv3+
MONITOR_USB_LICENSE_FILES = Copyright COPYING
MONITOR_USB_DEPENDENCIES = udev
MONITOR_USB_LDFLAGS += -L$(TARGET_DIR)/usr/lib/ -ludev
define MONITOR_USB_BUILD_CMDS
$(MAKE) CC="$(TARGET_CC)" CFLAGS="$(MONITOR_USB_CFLAGS)" \
LDFLAGS="$(MONITOR_USB_LDFLAGS)" -C $(@D) all
endef
define MONITOR_USB_INSTALL_TARGET_CMDS
$(INSTALL) -D -m 0755 $(@D)/monitor_usb $(TARGET_DIR)/usr/bin
endef
$(eval $(generic-package))
platform/config/buildroot/Config.in
source "../../platform/config/buildroot/monitor_usb/Config.in"
platform/config/buildroot/platform.mk
include ${PLATFORM_PATH}/monitor_usb/monitor_usb.mk
buildroot/buildroot-201902/configs/sun8iw20p1_t113_defconfig
BR2_PACKAGE_MONITOR_USB=y
配置程序为默认启动
t113_linux/platform/framework/auto/rootfs/etc/init.d$ tree
.
├── rcK
├── rcS
├── S01syslogd
├── S02klogd
├── S05mount_userdata
├── S10udev
├── S20urandom
├── S30dbus
├── S40network
├── S50bluetooth
├── S50postgresql
├── S52_4G-Daemon.sh
├── S80dnsmasq
├── S90alsa.sh
└── S92monitor_usb.sh
S92monitor_usb.sh
#!/bin/sh
case "$1" in
start)
echo "Starting monitor_usb"
/usr/bin/monitor_usb &
;;
stop)
echo "Stopping monitor_usb"
killall monitor_usb
;;
restart)
$0 stop
$0 start
;;
*)
echo "Usage: $0 {start|stop|restart}"
exit 1
;;
esac
exit 0
