Remove /proc/cpuinfo parsing

- Clean up the paths for ro.revision and ro.hardware parsing
- Use ro.hardwre in ueventd instead of parsing the kernel command line

(cherry-pick of 38b340a52f8e864650db8bae1eb88d5c00485db0.)

Bug: 19366018
Change-Id: I018a293f3d46e736a8b65132b5b00b0f7c20edae

init/init.cpp

@@ -65,8 +65,6 @@ static int property_triggers_enabled = 0;
 
 static char console[32];
 static char bootmode[32];
-static char hardware[32];
-static unsigned revision = 0;
 static char qemu[32];
 
 static struct action *cur_action = NULL;
@@ -773,6 +771,8 @@ static void export_kernel_boot_props(void)
         { "ro.boot.mode", "ro.bootmode", "unknown", },
         { "ro.boot.baseband", "ro.baseband", "unknown", },
         { "ro.boot.bootloader", "ro.bootloader", "unknown", },
+        { "ro.boot.hardware", "ro.hardware", "unknown", },
+        { "ro.boot.revision", "ro.revision", "0", },
     };
 
     for (i = 0; i < ARRAY_SIZE(prop_map); i++) {
@@ -791,16 +791,6 @@ static void export_kernel_boot_props(void)
     property_get("ro.bootmode", tmp);
     strlcpy(bootmode, tmp, sizeof(bootmode));
 
-    /* if this was given on kernel command line, override what we read
-     * before (e.g. from /proc/cpuinfo), if anything */
-    ret = property_get("ro.boot.hardware", tmp);
-    if (ret)
-        strlcpy(hardware, tmp, sizeof(hardware));
-    property_set("ro.hardware", hardware);
-
-    snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
-    property_set("ro.revision", tmp);
-
     /* TODO: these are obsolete. We should delete them */
     if (!strcmp(bootmode,"factory"))
         property_set("ro.factorytest", "1");
@@ -1012,8 +1002,6 @@ int main(int argc, char** argv) {
     klog_init();
     property_init();
 
-    get_hardware_name(hardware, &revision);
-
     process_kernel_cmdline();
 
     selinux_callback cb;

init/ueventd.cpp

@@ -30,28 +30,13 @@
 #include "util.h"
 #include "devices.h"
 #include "ueventd_parser.h"
-
-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));
-            }
-        }
-    }
-}
+#include "property_service.h"
 
 int ueventd_main(int argc, char **argv)
 {
     struct pollfd ufd;
     int nr;
+    char hardware[PROP_VALUE_MAX];
     char tmp[32];
 
     /*
@@ -83,12 +68,7 @@ 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);
+    property_get("ro.hardware", hardware);
 
     ueventd_parse_config_file("/ueventd.rc");
 

init/util.cpp

@@ -400,39 +400,6 @@ void open_devnull_stdio(void)
     exit(1);
 }
 
-void get_hardware_name(char *hardware, unsigned int *revision) {
-  // Hardware string was provided on kernel command line.
-  if (hardware[0]) {
-    return;
-  }
-
-  FILE* fp = fopen("/proc/cpuinfo", "re");
-  if (fp == NULL) {
-    return;
-  }
-  char buf[1024];
-  while (fgets(buf, sizeof(buf), fp) != NULL) {
-    if (strncmp(buf, "Hardware", 8) == 0) {
-      const char* hw = strstr(buf, ": ");
-      if (hw) {
-        hw += 2;
-        size_t n = 0;
-        while (*hw) {
-          if (!isspace(*hw)) {
-            hardware[n++] = tolower(*hw);
-          }
-          hw++;
-          if (n == 31) break;
-        }
-        hardware[n] = 0;
-      }
-    } else if (strncmp(buf, "Revision", 8) == 0) {
-      sscanf(buf, "Revision : %ux", revision);
-    }
-  }
-  fclose(fp);
-}
-
 void import_kernel_cmdline(int in_qemu,
                            void (*import_kernel_nv)(char *name, int in_qemu))
 {

init/util.h

@@ -42,7 +42,6 @@ void make_link(const char *oldpath, const char *newpath);
 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));
 int make_dir(const char *path, mode_t mode);
 int restorecon(const char *pathname);