cLK/patches/cwm_off_charge_v2.patch

diff --git a/extendedcommands.c b/extendedcommands.c
index 30b2f3e..3ec3436 100644
--- a/extendedcommands.c
+++ b/extendedcommands.c
@@ -19,6 +19,7 @@
 
 #include <signal.h>
 #include <sys/wait.h>
+#include <pthread.h>
 
 #include "bootloader.h"
 #include "common.h"
@@ -1158,22 +1159,95 @@ int volume_main(int argc, char **argv) {
     return 0;
 }
 
+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() {
-    const char* filename = "/proc/cmdline";
-    struct stat file_info;
-    if (0 != stat(filename, &file_info))
-        return;
 
-    int file_len = file_info.st_size;
-    char* file_data = (char*)malloc(file_len + 1);
-    FILE *file = fopen(filename, "rb");
-    if (file == NULL)
-        return;
-    fread(file_data, file_len, 1, file);
-    // supposedly not necessary, but let's be safe.
-    file_data[file_len] = '\0';
-    fclose(file);
-    
-    if (strstr(file_data, "androidboot.mode=offmode_charging") != NULL)
-        reboot(RB_POWER_OFF);
+    // 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(;;);
+    }
  }