X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev%2Flib%2Flibudev.c;h=2d8b7754ffff73abd38df3f2dfe426f0d61398c5;hb=1028fe14b65d861415cda99c4ff7d0bafd67bb7f;hp=12220e7a782aad29efdf9624cdd62c6bd4f47f19;hpb=659353f5a9a52336c41cf595d933311b8dc48937;p=elogind.git

diff --git a/udev/lib/libudev.c b/udev/lib/libudev.c
index 12220e7a7..2d8b7754f 100644
--- a/udev/lib/libudev.c
+++ b/udev/lib/libudev.c
@@ -25,9 +25,6 @@
 #include <errno.h>
 #include <string.h>
 #include <ctype.h>
-#ifdef USE_SELINUX
-#include <selinux/selinux.h>
-#endif
 
 #include "libudev.h"
 #include "libudev-private.h"
@@ -41,12 +38,8 @@ struct udev {
 	char *sys_path;
 	char *dev_path;
 	char *rules_path;
+	struct udev_list_node properties_list;
 	int log_priority;
-#ifdef USE_SELINUX
-	int selinux_initialized;
-	int selinux_enabled;
-	security_context_t selinux_prev_scontext;
-#endif
 	int run;
 };
 
@@ -72,26 +65,6 @@ static void log_stderr(struct udev *udev,
 	vfprintf(stderr, format, args);
 }
 
-static void selinux_init(struct udev *udev)
-{
-#ifdef USE_SELINUX
-	/*
-	 * record the present security context, for file-creation
-	 * restoration creation purposes.
-	 */
-	udev->selinux_enabled = (is_selinux_enabled() > 0);
-	info(udev, "selinux=%i\n", udev->selinux_enabled);
-	if (udev->selinux_enabled) {
-		matchpathcon_init_prefix(NULL, udev_get_dev_path(udev));
-		if (getfscreatecon(&udev->selinux_prev_scontext) < 0) {
-			err(udev, "getfscreatecon failed\n");
-			udev->selinux_prev_scontext = NULL;
-		}
-	}
-	udev->selinux_initialized = 1;
-#endif
-}
-
 void *udev_get_userdata(struct udev *udev)
 {
 	if (udev == NULL)
@@ -106,75 +79,13 @@ void udev_set_userdata(struct udev *udev, void *userdata)
 	udev->userdata = userdata;
 }
 
-static void selinux_exit(struct udev *udev)
-{
-#ifdef USE_SELINUX
-	if (!udev->selinux_initialized)
-		return;
-	if (udev->selinux_enabled) {
-		freecon(udev->selinux_prev_scontext);
-		udev->selinux_prev_scontext = NULL;
-	}
-#endif
-}
-
-void udev_selinux_lsetfilecon(struct udev *udev, const char *file, unsigned int mode)
-{
-#ifdef USE_SELINUX
-	if (!udev->selinux_initialized)
-		selinux_init(udev);
-	if (udev->selinux_enabled) {
-		security_context_t scontext = NULL;
-
-		if (matchpathcon(file, mode, &scontext) < 0) {
-			err(udev, "matchpathcon(%s) failed\n", file);
-			return;
-		} 
-		if (lsetfilecon(file, scontext) < 0)
-			err(udev, "setfilecon %s failed: %m\n", file);
-		freecon(scontext);
-	}
-#endif
-}
-
-void udev_selinux_setfscreatecon(struct udev *udev, const char *file, unsigned int mode)
-{
-#ifdef USE_SELINUX
-	if (!udev->selinux_initialized)
-		selinux_init(udev);
-	if (udev->selinux_enabled) {
-		security_context_t scontext = NULL;
-
-		if (matchpathcon(file, mode, &scontext) < 0) {
-			err(udev, "matchpathcon(%s) failed\n", file);
-			return;
-		}
-		if (setfscreatecon(scontext) < 0)
-			err(udev, "setfscreatecon %s failed: %m\n", file);
-		freecon(scontext);
-	}
-#endif
-}
-
-void udev_selinux_resetfscreatecon(struct udev *udev)
-{
-#ifdef USE_SELINUX
-	if (!udev->selinux_initialized)
-		selinux_init(udev);
-	if (udev->selinux_enabled) {
-		if (setfscreatecon(udev->selinux_prev_scontext) < 0)
-			err(udev, "setfscreatecon failed: %m\n");
-	}
-#endif
-}
-
 /**
  * udev_new:
  *
  * Create udev library context.
  *
  * The initial refcount is 1, and needs to be decremented to
- * release the ressources of the udev library context.
+ * release the resources of the udev library context.
  *
  * Returns: a new udev library context
  **/
@@ -185,13 +96,13 @@ struct udev *udev_new(void)
 	char *config_file;
 	FILE *f;
 
-	udev = malloc(sizeof(struct udev));
+	udev = calloc(1, sizeof(struct udev));
 	if (udev == NULL)
 		return NULL;
-	memset(udev, 0x00, (sizeof(struct udev)));
 	udev->refcount = 1;
 	udev->log_fn = log_stderr;
 	udev->log_priority = LOG_ERR;
+	udev_list_init(&udev->properties_list);
 	udev->run = 1;
 	udev->dev_path = strdup(UDEV_PREFIX "/dev");
 	udev->sys_path = strdup("/sys");
@@ -207,6 +118,7 @@ struct udev *udev_new(void)
 		free(udev->sys_path);
 		udev->sys_path = strdup(env);
 		util_remove_trailing_chars(udev->sys_path, '/');
+		udev_add_property(udev, "SYSFS_PATH", udev->sys_path);
 	}
 
 	env = getenv("UDEV_RUN");
@@ -285,7 +197,7 @@ struct udev *udev_new(void)
 			}
 
 			if (strcasecmp(key, "udev_log") == 0) {
-				udev->log_priority = util_log_priority(val);
+				udev_set_log_priority(udev, util_log_priority(val));
 				continue;
 			}
 			if (strcasecmp(key, "udev_root") == 0) {
@@ -309,21 +221,22 @@ struct udev *udev_new(void)
 		free(udev->dev_path);
 		udev->dev_path = strdup(env);
 		util_remove_trailing_chars(udev->dev_path, '/');
+		udev_add_property(udev, "UDEV_ROOT", udev->dev_path);
 	}
 
 	env = getenv("UDEV_LOG");
 	if (env != NULL)
-		udev->log_priority = util_log_priority(env);
+		udev_set_log_priority(udev, util_log_priority(env));
 
 	if (udev->dev_path == NULL || udev->sys_path == NULL)
 		goto err;
-	info(udev, "context %p created\n", udev);
-	info(udev, "log_priority=%d\n", udev->log_priority);
-	info(udev, "config_file='%s'\n", config_file);
-	info(udev, "dev_path='%s'\n", udev->dev_path);
-	info(udev, "sys_path='%s'\n", udev->sys_path);
+	dbg(udev, "context %p created\n", udev);
+	dbg(udev, "log_priority=%d\n", udev->log_priority);
+	dbg(udev, "config_file='%s'\n", config_file);
+	dbg(udev, "dev_path='%s'\n", udev->dev_path);
+	dbg(udev, "sys_path='%s'\n", udev->sys_path);
 	if (udev->rules_path != NULL)
-		info(udev, "rules_path='%s'\n", udev->rules_path);
+		dbg(udev, "rules_path='%s'\n", udev->rules_path);
 	free(config_file);
 	return udev;
 err:
@@ -354,7 +267,7 @@ struct udev *udev_ref(struct udev *udev)
  * @udev: udev library context
  *
  * Drop a reference of the udev library context. If the refcount
- * reaches zero, the ressources of the context will be released.
+ * reaches zero, the resources of the context will be released.
  *
  **/
 void udev_unref(struct udev *udev)
@@ -364,11 +277,11 @@ void udev_unref(struct udev *udev)
 	udev->refcount--;
 	if (udev->refcount > 0)
 		return;
-	selinux_exit(udev);
+	udev_list_cleanup_entries(udev, &udev->properties_list);
 	free(udev->dev_path);
 	free(udev->sys_path);
 	free(udev->rules_path);
-	info(udev, "context %p released\n", udev);
+	dbg(udev, "context %p released\n", udev);
 	free(udev);
 }
 
@@ -377,10 +290,9 @@ void udev_unref(struct udev *udev)
  * @udev: udev library context
  * @log_fn: function to be called for logging messages
  *
- * The built-in logging, which writes to stderr if the
- * LIBUDEV_DEBUG environment variable is set, can be
+ * The built-in logging writes to stderr. It can be
  * overridden by a custom function, to plug log messages
- * into the users logging functionality.
+ * into the users' logging functionality.
  *
  **/
 void udev_set_log_fn(struct udev *udev,
@@ -399,7 +311,11 @@ int udev_get_log_priority(struct udev *udev)
 
 void udev_set_log_priority(struct udev *udev, int priority)
 {
+	char num[32];
+
 	udev->log_priority = priority;
+	snprintf(num, sizeof(num), "%u", udev->log_priority);
+	udev_add_property(udev, "UDEV_LOG", num);
 }
 
 const char *udev_get_rules_path(struct udev *udev)
@@ -445,3 +361,22 @@ const char *udev_get_dev_path(struct udev *udev)
 		return NULL;
 	return udev->dev_path;
 }
+
+struct udev_list_entry *udev_add_property(struct udev *udev, const char *key, const char *value)
+{
+	if (value == NULL) {
+		struct udev_list_entry *list_entry;
+
+		list_entry = udev_get_properties_list_entry(udev);
+		list_entry = udev_list_entry_get_by_name(list_entry, key);
+		if (list_entry != NULL)
+			udev_list_entry_delete(list_entry);
+		return NULL;
+	}
+	return udev_list_entry_add(udev, &udev->properties_list, key, value, 1, 0);
+}
+
+struct udev_list_entry *udev_get_properties_list_entry(struct udev *udev)
+{
+	return udev_list_get_entry(&udev->properties_list);
+}