sdcard: use libpackageparser

Switch from the internal packages.list file parser
implementation to a common parser library.

See Change-Id: I87a406802f95d8e7bfd8ee85f723f80e9e6b6c0c
for all of the details.

Change-Id: I98924dce406b322e0d402bca7fdac51f6a1e6a4b
Signed-off-by: William Roberts <william.c.roberts@intel.com>

sdcard/Android.mk

@@ -5,7 +5,6 @@ include $(CLEAR_VARS)
 LOCAL_SRC_FILES := sdcard.c
 LOCAL_MODULE := sdcard
 LOCAL_CFLAGS := -Wall -Wno-unused-parameter -Werror
-
-LOCAL_SHARED_LIBRARIES := libcutils
+LOCAL_SHARED_LIBRARIES := libcutils libpackagelistparser
 
 include $(BUILD_EXECUTABLE)

sdcard/sdcard.c

@@ -24,6 +24,7 @@
 #include <limits.h>
 #include <linux/fuse.h>
 #include <pthread.h>
+#include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -34,13 +35,15 @@
 #include <sys/stat.h>
 #include <sys/statfs.h>
 #include <sys/time.h>
+#include <sys/types.h>
 #include <sys/uio.h>
 #include <unistd.h>
 
 #include <cutils/fs.h>
 #include <cutils/hashmap.h>
 #include <cutils/log.h>
 #include <cutils/multiuser.h>
+#include <packagelistparser/packagelistparser.h>
 
 #include <private/android_filesystem_config.h>
 
@@ -103,9 +106,6 @@
  * or that a reply has already been written. */
 #define NO_STATUS 1
 
-/* Path to system-provided mapping of package name to appIds */
-static const char* const kPackagesListFile = "/data/system/packages.list";
-
 /* Supplementary groups to execute with */
 static const gid_t kGroups[1] = { AID_PACKAGE_INFO };
 
@@ -1636,35 +1636,27 @@ static bool remove_str_to_int(void *key, void *value, void *context) {
     return true;
 }
 
-static int read_package_list(struct fuse_global* global) {
-    pthread_mutex_lock(&global->lock);
-
-    hashmapForEach(global->package_to_appid, remove_str_to_int, global->package_to_appid);
+static bool package_parse_callback(pkg_info *info, void *userdata) {
+    struct fuse_global *global = (struct fuse_global *)userdata;
 
-    FILE* file = fopen(kPackagesListFile, "r");
-    if (!file) {
-        ERROR("failed to open package list: %s\n", strerror(errno));
-        pthread_mutex_unlock(&global->lock);
-        return -1;
-    }
+    char* name = strdup(info->name);
+    hashmapPut(global->package_to_appid, name, (void*) (uintptr_t) info->uid);
+    packagelist_free(info);
+    return true;
+}
 
-    char buf[512];
-    while (fgets(buf, sizeof(buf), file) != NULL) {
-        char package_name[512];
-        int appid;
-        char gids[512];
+static bool read_package_list(struct fuse_global* global) {
+    pthread_mutex_lock(&global->lock);
 
-        if (sscanf(buf, "%s %d %*d %*s %*s %s", package_name, &appid, gids) == 3) {
-            char* package_name_dup = strdup(package_name);
-            hashmapPut(global->package_to_appid, package_name_dup, (void*) (uintptr_t) appid);
-        }
-    }
+    hashmapForEach(global->package_to_appid, remove_str_to_int, global->package_to_appid);
 
+    bool rc = packagelist_parse(package_parse_callback, global);
     TRACE("read_package_list: found %zu packages\n",
             hashmapSize(global->package_to_appid));
-    fclose(file);
+
     pthread_mutex_unlock(&global->lock);
-    return 0;
+
+    return rc;
 }
 
 static void watch_package_list(struct fuse_global* global) {
@@ -1680,11 +1672,11 @@ static void watch_package_list(struct fuse_global* global) {
     bool active = false;
     while (1) {
         if (!active) {
-            int res = inotify_add_watch(nfd, kPackagesListFile, IN_DELETE_SELF);
+            int res = inotify_add_watch(nfd, PACKAGES_LIST_FILE, IN_DELETE_SELF);
             if (res == -1) {
                 if (errno == ENOENT || errno == EACCES) {
                     /* Framework may not have created yet, sleep and retry */
-                    ERROR("missing packages.list; retrying\n");
+                    ERROR("missing \"%s\"; retrying\n", PACKAGES_LIST_FILE);
                     sleep(3);
                     continue;
                 } else {
@@ -1695,8 +1687,8 @@ static void watch_package_list(struct fuse_global* global) {
 
             /* Watch above will tell us about any future changes, so
              * read the current state. */
-            if (read_package_list(global) == -1) {
-                ERROR("read_package_list failed: %s\n", strerror(errno));
+            if (read_package_list(global) == false) {
+                ERROR("read_package_list failed\n");
                 return;
             }
             active = true;