感谢：Github无私贡献与分享的大量代码；
修改文件：bootable/recovery/extendedcommands.c
修改后的文件对比：diff bootable/recovery/extendedcommands.c.origin bootable/recovery/extendedcommands.c
21a22 > #include <pthread.h> 1537a1539,1633 > > //add by linksuce start, cwm off mode charging > //Origin:github.com/cedesmith/cLK/blob/master/patches/cwm_off_charge_v2.patch > static int write_file(char* path, void* data, int data_size) > { > int fd; > fd = open(path, O_WRONLY); > if (fd >= 0) { > int written = write(fd, data, data_size); > close(fd); > return written; > } > return -1; > } > > static int read_file(char* path, void* data, int data_size) > { > int fd; > fd = open(path, O_RDONLY); > if(fd >= 0){ > int readed = read(fd, data, data_size); > close(fd); > return readed; > } > return -1; > } > > static void* battery_thread(void *cookie) > { > char status[40]; > int state=-1; > int dischargeCount=0; > > while(1){ > memset(status, 0, sizeof(status)); > read_file("/sys/class/power_supply/battery/status", status, sizeof(status)-1); > if(strstr(status, "Full")!=NULL && state!=1){ > state=1; > write_file("/sys/class/leds/amber/brightness", "0\n", sizeof("0\n")-1); > write_file("/sys/class/leds/green/brightness", "1\n", sizeof("1\n")-1); > }else if(strstr(status, "Charging")!=NULL && state!=2){ > state=2; > write_file("/sys/class/leds/amber/brightness", "1\n", sizeof("1\n")-1); > write_file("/sys/class/leds/green/brightness", "0\n", sizeof("0\n")-1); > }else if(strstr(status, "Discharging")!=NULL){ > state=3; > if(dischargeCount==0){ //blink every 2 seconds > read_file("/sys/class/leds/amber/brightness", status, sizeof(status)-1); > if(status[0]=='0') write_file("/sys/class/leds/amber/brightness", "1\n", sizeof("1\n")-1); > else write_file("/sys/class/leds/amber/brightness", "0\n", sizeof("0\n")-1); > } > read_file("/sys/class/power_supply/battery/over_vchg", status, sizeof(status)-1); > dischargeCount=(dischargeCount+1)%4; > }else if(strstr(status,"Not charging")!=NULL && state!=4){ > state=4; > write_file("/sys/class/leds/amber/brightness", "0\n", sizeof("0\n")-1); > write_file("/sys/class/leds/green/brightness", "0\n", sizeof("0\n")-1); > sync(); > reboot(RB_POWER_OFF); > for(;;); > } > usleep(500000); //wait half a second > } > return NULL; > } > > void handle_chargemode() { > // old code to read /proc/cmdline was broken because file size is always 0 so file_data was always empty string > char cmdline[1024]; > memset(cmdline, 0, sizeof(cmdline)); > if(read_file("/proc/cmdline", cmdline, sizeof(cmdline)-1) < 0) return; > > if (strstr(cmdline, "androidboot.mode=offmode_charging") != NULL) > { > write_file("/sys/class/leds/lcd-backlight/brightness", "0\n", sizeof("0\n")-1); > write_file("/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor", "powersave\n", sizeof("powersave\n")-1); > write_file("/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq", "245000\n", sizeof("245000\n")-1); > write_file("/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed", "245000\n", sizeof("245000\n")-1); > > pthread_t t; > pthread_create(&t, NULL, battery_thread, NULL); > > // let recovery kernel charge the battery, reboot on any key press so Android will start as user would expect > // ev_init(); > struct input_event ev; > do { > ev_get(&ev, 0); > if(ev.type==EV_KEY) write_file("/sys/class/leds/lcd-backlight/brightness", "0\n", sizeof("0\n")-1); > } while (!(ev.type==EV_KEY && ev.code==KEY_END)); > > reboot(RB_AUTOBOOT); > for(;;); > } > } > // add by linkscue end, cwm off mode charging