Pick up on androidboot.hardware kernel cmd option

x86 emulator passes hardware name through the androidboot.hardware kernel cmd option, and
ueventd must pick up on it to locate proper ueventd.rc file for that hardware.

Change-Id: Id61c5b67fe6275a15c7aa62556e0b89eda7968f8

init/init.c

@@ -92,7 +92,7 @@ static const char *ENV[32];
 int add_environment(const char *key, const char *val)
 {
     int n;
- 
+
     for (n = 0; n < 31; n++) {
         if (!ENV[n]) {
             size_t len = strlen(key) + strlen(val) + 2;
@@ -156,7 +156,7 @@ void service_start(struct service *svc, const char *dynamic_args)
          */
     svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING|SVC_RESET));
     svc->time_started = 0;
-    
+
         /* running processes require no additional work -- if
          * they're in the process of exiting, we've ensured
          * that they will immediately restart on exit, unless
@@ -381,7 +381,7 @@ static void msg_start(const char *name)
 
         svc = service_find_by_name(tmp);
     }
-    
+
     if (svc) {
         service_start(svc, args);
     } else {
@@ -455,38 +455,6 @@ static void import_kernel_nv(char *name, int in_qemu)
     }
 }
 
-static void import_kernel_cmdline(int in_qemu)
-{
-    char cmdline[1024];
-    char *ptr;
-    int fd;
-
-    fd = open("/proc/cmdline", O_RDONLY);
-    if (fd >= 0) {
-        int n = read(fd, cmdline, 1023);
-        if (n < 0) n = 0;
-
-        /* get rid of trailing newline, it happens */
-        if (n > 0 && cmdline[n-1] == '\n') n--;
-
-        cmdline[n] = 0;
-        close(fd);
-    } else {
-        cmdline[0] = 0;
-    }
-
-    ptr = cmdline;
-    while (ptr && *ptr) {
-        char *x = strchr(ptr, ' ');
-        if (x != 0) *x++ = 0;
-        import_kernel_nv(ptr, in_qemu);
-        ptr = x;
-    }
-
-        /* don't expose the raw commandline to nonpriv processes */
-    chmod("/proc/cmdline", 0440);
-}
-
 static struct command *get_first_command(struct action *act)
 {
     struct listnode *node;
@@ -609,7 +577,7 @@ static int set_init_properties_action(int nargs, char **args)
     char tmp[PROP_VALUE_MAX];
 
     if (qemu[0])
-        import_kernel_cmdline(1);
+        import_kernel_cmdline(1, import_kernel_nv);
 
     if (!strcmp(bootmode,"factory"))
         property_set("ro.factorytest", "1");
@@ -729,13 +697,14 @@ int main(int argc, char **argv)
          */
     open_devnull_stdio();
     klog_init();
-    
+
     INFO("reading config file\n");
     init_parse_config_file("/init.rc");
 
     /* pull the kernel commandline and ramdisk properties file in */
-    import_kernel_cmdline(0);
-
+    import_kernel_cmdline(0, import_kernel_nv);
+    /* don't expose the raw commandline to nonpriv processes */
+    chmod("/proc/cmdline", 0440);
     get_hardware_name(hardware, &revision);
     snprintf(tmp, sizeof(tmp), "/init.%s.rc", hardware);
     init_parse_config_file(tmp);

init/ueventd.c

@@ -33,6 +33,20 @@
 static char hardware[32];
 static unsigned revision = 0;
 
+static void import_kernel_nv(char *name, int in_qemu)
+{
+    if (*name != '\0') {
+        char *value = strchr(name, '=');
+        if (value != NULL) {
+            *value++ = 0;
+            if (!strcmp(name,"androidboot.hardware"))
+            {
+                strlcpy(hardware, value, sizeof(hardware));
+            }
+        }
+    }
+}
+
 int ueventd_main(int argc, char **argv)
 {
     struct pollfd ufd;
@@ -51,6 +65,11 @@ int ueventd_main(int argc, char **argv)
 
     INFO("starting ueventd\n");
 
+    /* Respect hardware passed in through the kernel cmd line. Here we will look
+     * for androidboot.hardware param in kernel cmdline, and save its value in
+     * hardware[]. */
+    import_kernel_cmdline(0, import_kernel_nv);
+
     get_hardware_name(hardware, &revision);
 
     ueventd_parse_config_file("/ueventd.rc");

init/util.c

@@ -399,3 +399,33 @@ void get_hardware_name(char *hardware, unsigned int *revision)
         }
     }
 }
+
+void import_kernel_cmdline(int in_qemu,
+                           void (*import_kernel_nv)(char *name, int in_qemu))
+{
+    char cmdline[1024];
+    char *ptr;
+    int fd;
+
+    fd = open("/proc/cmdline", O_RDONLY);
+    if (fd >= 0) {
+        int n = read(fd, cmdline, 1023);
+        if (n < 0) n = 0;
+
+        /* get rid of trailing newline, it happens */
+        if (n > 0 && cmdline[n-1] == '\n') n--;
+
+        cmdline[n] = 0;
+        close(fd);
+    } else {
+        cmdline[0] = 0;
+    }
+
+    ptr = cmdline;
+    while (ptr && *ptr) {
+        char *x = strchr(ptr, ' ');
+        if (x != 0) *x++ = 0;
+        import_kernel_nv(ptr, in_qemu);
+        ptr = x;
+    }
+}

init/util.h

@@ -38,4 +38,5 @@ void remove_link(const char *oldpath, const char *newpath);
 int wait_for_file(const char *filename, int timeout);
 void open_devnull_stdio(void);
 void get_hardware_name(char *hardware, unsigned int *revision);
+void import_kernel_cmdline(int in_qemu, void (*import_kernel_nv)(char *name, int in_qemu));
 #endif