1 files changed, 173 insertions, 0 deletions
diff --git a/init/ueventd.cpp b/init/ueventd.cpp
new file mode 100644
index 0000000..c63fdaa
--- /dev/null
+++ b/init/ueventd.cpp
@@ -0,0 +1,173 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <ctype.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <base/stringprintf.h>
+#include <private/android_filesystem_config.h>
+#include <selinux/selinux.h>
+
+#include "ueventd.h"
+#include "log.h"
+#include "util.h"
+#include "devices.h"
+#include "ueventd_parser.h"
+#include "property_service.h"
+
+int ueventd_main(int argc, char **argv)
+{
+    /*
+     * init sets the umask to 077 for forked processes. We need to
+     * create files with exact permissions, without modification by
+     * the umask.
+     */
+    umask(000);
+
+    /* Prevent fire-and-forget children from becoming zombies.
+     * If we should need to wait() for some children in the future
+     * (as opposed to none right now), double-forking here instead
+     * of ignoring SIGCHLD may be the better solution.
+     */
+    signal(SIGCHLD, SIG_IGN);
+
+    open_devnull_stdio();
+    klog_init();
+    klog_set_level(KLOG_NOTICE_LEVEL);
+
+    NOTICE("ueventd started!\n");
+
+    selinux_callback cb;
+    cb.func_log = selinux_klog_callback;
+    selinux_set_callback(SELINUX_CB_LOG, cb);
+
+    char hardware[PROP_VALUE_MAX];
+    property_get("ro.hardware", hardware);
+
+    ueventd_parse_config_file("/ueventd.rc");
+    ueventd_parse_config_file(android::base::StringPrintf("/ueventd.%s.rc", hardware).c_str());
+
+    device_init();
+
+    pollfd ufd;
+    ufd.events = POLLIN;
+    ufd.fd = get_device_fd();
+
+    while (true) {
+        ufd.revents = 0;
+        int nr = poll(&ufd, 1, -1);
+        if (nr <= 0) {
+            continue;
+        }
+        if (ufd.revents & POLLIN) {
+            handle_device_fd();
+        }
+    }
+
+    return 0;
+}
+
+static int get_android_id(const char *id)
+{
+    unsigned int i;
+    for (i = 0; i < ARRAY_SIZE(android_ids); i++)
+        if (!strcmp(id, android_ids[i].name))
+            return android_ids[i].aid;
+    return -1;
+}
+
+void set_device_permission(int nargs, char **args)
+{
+    char *name;
+    char *attr = 0;
+    mode_t perm;
+    uid_t uid;
+    gid_t gid;
+    int prefix = 0;
+    int wildcard = 0;
+    char *endptr;
+    int ret;
+    char *tmp = 0;
+
+    if (nargs == 0)
+        return;
+
+    if (args[0][0] == '#')
+        return;
+
+    name = args[0];
+
+    if (!strncmp(name,"/sys/", 5) && (nargs == 5)) {
+        INFO("/sys/ rule %s %s\n",args[0],args[1]);
+        attr = args[1];
+        args++;
+        nargs--;
+    }
+
+    if (nargs != 4) {
+        ERROR("invalid line ueventd.rc line for '%s'\n", args[0]);
+        return;
+    }
+
+    /* If path starts with mtd@ lookup the mount number. */
+    if (!strncmp(name, "mtd@", 4)) {
+        int n = mtd_name_to_number(name + 4);
+        if (n >= 0)
+            asprintf(&tmp, "/dev/mtd/mtd%d", n);
+        name = tmp;
+    } else {
+        int len = strlen(name);
+        char *wildcard_chr = strchr(name, '*');
+        if ((name[len - 1] == '*') &&
+            (wildcard_chr == (name + len - 1))) {
+            prefix = 1;
+            name[len - 1] = '\0';
+        } else if (wildcard_chr) {
+            wildcard = 1;
+        }
+    }
+
+    perm = strtol(args[1], &endptr, 8);
+    if (!endptr || *endptr != '\0') {
+        ERROR("invalid mode '%s'\n", args[1]);
+        free(tmp);
+        return;
+    }
+
+    ret = get_android_id(args[2]);
+    if (ret < 0) {
+        ERROR("invalid uid '%s'\n", args[2]);
+        free(tmp);
+        return;
+    }
+    uid = ret;
+
+    ret = get_android_id(args[3]);
+    if (ret < 0) {
+        ERROR("invalid gid '%s'\n", args[3]);
+        free(tmp);
+        return;
+    }
+    gid = ret;
+
+    add_dev_perms(name, attr, perm, uid, gid, prefix, wildcard);
+    free(tmp);
+}