move imported udev into place

1 files changed, 185 insertions, 0 deletions

diff --git a/src/udev/libudev-device-private.c b/src/udev/libudev-device-private.c
new file mode 100644
index 0000000000..13fdb8eb57
--- /dev/null
+++ b/src/udev/libudev-device-private.c
@@ -0,0 +1,185 @@
+/*
+ * libudev - interface to udev device information
+ *
+ * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/stat.h>
+
+#include "libudev.h"
+#include "libudev-private.h"
+
+static void udev_device_tag(struct udev_device *dev, const char *tag, bool add)
+{
+        const char *id;
+        struct udev *udev = udev_device_get_udev(dev);
+        char filename[UTIL_PATH_SIZE];
+
+        id = udev_device_get_id_filename(dev);
+        if (id == NULL)
+                return;
+        util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/tags/", tag, "/", id, NULL);
+
+        if (add) {
+                int fd;
+
+                util_create_path(udev, filename);
+                fd = open(filename, O_WRONLY|O_CREAT|O_CLOEXEC|O_TRUNC|O_NOFOLLOW, 0444);
+                if (fd >= 0)
+                        close(fd);
+        } else {
+                unlink(filename);
+        }
+}
+
+int udev_device_tag_index(struct udev_device *dev, struct udev_device *dev_old, bool add)
+{
+        struct udev_list_entry *list_entry;
+        bool found;
+
+        if (add && dev_old != NULL) {
+                /* delete possible left-over tags */
+                udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(dev_old)) {
+                        const char *tag_old = udev_list_entry_get_name(list_entry);
+                        struct udev_list_entry *list_entry_current;
+
+                        found = false;
+                        udev_list_entry_foreach(list_entry_current, udev_device_get_tags_list_entry(dev)) {
+                                const char *tag = udev_list_entry_get_name(list_entry_current);
+
+                                if (strcmp(tag, tag_old) == 0) {
+                                        found = true;
+                                        break;
+                                }
+                        }
+                        if (!found)
+                                udev_device_tag(dev_old, tag_old, false);
+                }
+        }
+
+        udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(dev))
+                udev_device_tag(dev, udev_list_entry_get_name(list_entry), add);
+
+        return 0;
+}
+
+static bool device_has_info(struct udev_device *udev_device)
+{
+        struct udev_list_entry *list_entry;
+
+        if (udev_device_get_devlinks_list_entry(udev_device) != NULL)
+                return true;
+        if (udev_device_get_devlink_priority(udev_device) != 0)
+                return true;
+        udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device))
+                if (udev_list_entry_get_num(list_entry))
+                        return true;
+        if (udev_device_get_tags_list_entry(udev_device) != NULL)
+                return true;
+        if (udev_device_get_watch_handle(udev_device) >= 0)
+                return true;
+        return false;
+}
+
+int udev_device_update_db(struct udev_device *udev_device)
+{
+        bool has_info;
+        const char *id;
+        struct udev *udev = udev_device_get_udev(udev_device);
+        char filename[UTIL_PATH_SIZE];
+        char filename_tmp[UTIL_PATH_SIZE];
+        FILE *f;
+
+        id = udev_device_get_id_filename(udev_device);
+        if (id == NULL)
+                return -1;
+
+        has_info = device_has_info(udev_device);
+        util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/data/", id, NULL);
+
+        /* do not store anything for otherwise empty devices */
+        if (!has_info &&
+            major(udev_device_get_devnum(udev_device)) == 0 &&
+            udev_device_get_ifindex(udev_device) == 0) {
+                unlink(filename);
+                return 0;
+        }
+
+        /* write a database file */
+        util_strscpyl(filename_tmp, sizeof(filename_tmp), filename, ".tmp", NULL);
+        util_create_path(udev, filename_tmp);
+        f = fopen(filename_tmp, "we");
+        if (f == NULL) {
+                err(udev, "unable to create temporary db file '%s': %m\n", filename_tmp);
+                return -1;
+        }
+
+        /*
+         * set 'sticky' bit to indicate that we should not clean the
+         * database when we transition from initramfs to the real root
+         */
+        if (udev_device_get_db_persist(udev_device))
+                fchmod(fileno(f), 01644);
+
+        if (has_info) {
+                struct udev_list_entry *list_entry;
+
+                if (major(udev_device_get_devnum(udev_device)) > 0) {
+                        size_t devlen = strlen(udev_get_dev_path(udev))+1;
+
+                        udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(udev_device))
+                                fprintf(f, "S:%s\n", &udev_list_entry_get_name(list_entry)[devlen]);
+                        if (udev_device_get_devlink_priority(udev_device) != 0)
+                                fprintf(f, "L:%i\n", udev_device_get_devlink_priority(udev_device));
+                        if (udev_device_get_watch_handle(udev_device) >= 0)
+                                fprintf(f, "W:%i\n", udev_device_get_watch_handle(udev_device));
+                }
+
+                if (udev_device_get_usec_initialized(udev_device) > 0)
+                        fprintf(f, "I:%llu\n", udev_device_get_usec_initialized(udev_device));
+
+                udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
+                        if (!udev_list_entry_get_num(list_entry))
+                                continue;
+                        fprintf(f, "E:%s=%s\n",
+                                udev_list_entry_get_name(list_entry),
+                                udev_list_entry_get_value(list_entry));
+                }
+
+                udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device))
+                        fprintf(f, "G:%s\n", udev_list_entry_get_name(list_entry));
+        }
+
+        fclose(f);
+        rename(filename_tmp, filename);
+        info(udev, "created %s file '%s' for '%s'\n", has_info ? "db" : "empty",
+             filename, udev_device_get_devpath(udev_device));
+        return 0;
+}
+
+int udev_device_delete_db(struct udev_device *udev_device)
+{
+        const char *id;
+        struct udev *udev = udev_device_get_udev(udev_device);
+        char filename[UTIL_PATH_SIZE];
+
+        id = udev_device_get_id_filename(udev_device);
+        if (id == NULL)
+                return -1;
+        util_strscpyl(filename, sizeof(filename), udev_get_run_path(udev), "/data/", id, NULL);
+        unlink(filename);
+        return 0;
+}