Refactor resetprop

jni/include/resetprop.h

@@ -12,9 +12,11 @@ int prop_exist(const char *name);
 int setprop(const char *name, const char *value);
 int setprop2(const char *name, const char *value, const int trigger);
 char *getprop(const char *name);
-int deleteprop(const char *name, const int trigger);
+char *getprop2(const char *name, int persist);
+int deleteprop(const char *name);
+int deleteprop2(const char *name, const int persist);
 int read_prop_file(const char* filename, const int trigger);
-void getprop_all(void (*cbk)(const char *name));
+void getprop_all(void (*callback)(const char*, const char*));
 
 #ifdef __cplusplus
 }

jni/magiskhide/hide_utils.c

@@ -58,9 +58,9 @@ void hide_sensitive_props() {
 	}
 }
 
-static void rm_magisk_prop(const char *name) {
+static void rm_magisk_prop(const char *name, const char *value) {
 	if (strstr(name, "magisk")) {
-		deleteprop(name, 0);
+		deleteprop2(name, 0);
 	}
 }
 

jni/magiskhide/magiskhide.c

@@ -55,7 +55,7 @@ void launch_magiskhide(int client) {
 	hideEnabled = 1;
 	LOGI("* Starting MagiskHide\n");
 
-	deleteprop(MAGISKHIDE_PROP, 1);
+	deleteprop2(MAGISKHIDE_PROP, 1);
 
 	hide_sensitive_props();
 
@@ -102,7 +102,7 @@ void stop_magiskhide(int client) {
 	hideEnabled = 0;
 	setprop(MAGISKHIDE_PROP, "0");
 	// Remove without actually removing persist props
-	deleteprop(MAGISKHIDE_PROP, 0);
+	deleteprop2(MAGISKHIDE_PROP, 0);
 	pthread_kill(proc_monitor_thread, SIGUSR1);
 
 	write_int(client, DAEMON_SUCCESS);

jni/resetprop/resetprop.cpp

@@ -56,59 +56,76 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <string.h>
+#include <dirent.h>
 #include <sys/types.h>
 
 #define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
 #include "_system_properties.h"
 #include "system_properties.h"
+
 #include "magisk.h"
 #include "resetprop.h"
+extern "C" {
+#include "vector.h"
+}
 
-#define PRINT_D(...)  { LOGD(__VA_ARGS__); if (verbose) printf(__VA_ARGS__); }
+#define PRINT_D(...)  { LOGD(__VA_ARGS__); if (verbose) fprintf(stderr, __VA_ARGS__); }
 #define PRINT_E(...)  { LOGE(__VA_ARGS__); fprintf(stderr, __VA_ARGS__); }
 #define PERSISTENT_PROPERTY_DIR  "/data/property"
 
 static int verbose = 0;
 
-static bool is_legal_property_name(const char *name, size_t namelen) {
+static int check_legal_property_name(const char *name) {
+	int namelen = strlen(name);
 
-    if (namelen < 1) return false;
+	if (namelen < 1) goto illegal;
-    if (name[0] == '.') return false;
+	if (name[0] == '.') goto illegal;
-    if (name[namelen - 1] == '.') return false;
+	if (name[namelen - 1] == '.') goto illegal;
 
 	/* Only allow alphanumeric, plus '.', '-', '@', ':', or '_' */
 	/* Don't allow ".." to appear in a property name */
 	for (size_t i = 0; i < namelen; i++) {
 		if (name[i] == '.') {
 			// i=0 is guaranteed to never have a dot. See above.
-            if (name[i-1] == '.') return false;
+			if (name[i-1] == '.') goto illegal;
 			continue;
 		}
 		if (name[i] == '_' || name[i] == '-' || name[i] == '@' || name[i] == ':') continue;
 		if (name[i] >= 'a' && name[i] <= 'z') continue;
 		if (name[i] >= 'A' && name[i] <= 'Z') continue;
 		if (name[i] >= '0' && name[i] <= '9') continue;
-        return false;
+		goto illegal;
 	}
 
-    return true;
+	return 0;
+
+illegal:
+	PRINT_E("Illegal property name: [%s]\n", name);
+	return 1;
 }
 
 static int usage(char* arg0) {
 	fprintf(stderr,
 		"resetprop v" xstr(MAGISK_VERSION) "(" xstr(MAGISK_VER_CODE) ") (by topjohnwu & nkk71) - System Props Modification Tool\n\n"
-        "Usage: %s [options] [args...]\n"
+		"Usage: %s [flags] [options...]\n"
 		"\n"
 		"Options:\n"
-        "   -v      show verbose output\n"
+		"   -h, --help        show this message\n"
-        "   -n      only modify property in memory\n"
+		"   (no arguments)    print all properties\n"
+		"   NAME              get property\n"
+		"   NAME VALUE        set property entry NAME with VALUE\n"
+		"   --file FILE       load props from FILE\n"
+		"   --delete NAME     delete property\n"
 		"\n"
-        "%s  NAME VALUE        set property entry NAME with VALUE\n"
+		"Flags:\n"
-        "%s  --file FILE       load props from FILE\n"
+		"   -v      print verbose output to stderr\n"
-        "%s  --delete NAME     remove prop entry NAME\n"
+		"   -n      set properties without init triggers\n"
+		"           only affects setprop\n"
+		"   -p      access actual persist storage\n"
+		"           only affects getprop and deleteprop\n"
 		"\n"
 
-    , arg0, arg0, arg0, arg0);
+	, arg0);
 	return 1;
 }
 
@@ -129,34 +146,112 @@ static void read_prop_info(void* cookie, const char *name, const char *value, ui
 	strcpy((char *) cookie, value);
 }
 
-// Get prop by name, return string (should free manually!)
+
 char *getprop(const char *name) {
+	return getprop2(name, 0);
+}
+
+// Get prop by name, return string (should free manually!)
+char *getprop2(const char *name, int persist) {
+	if (check_legal_property_name(name))
+		return NULL;
+	char value[PROP_VALUE_MAX];
 	if (init_resetprop()) return NULL;
 	const prop_info *pi = __system_property_find2(name);
 	if (pi == NULL) {
+		if (persist && strncmp(name, "persist.", 8) == 0) {
+			// Try to read from file
+			char path[PATH_MAX];
+			snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
+			int fd = open(path, O_RDONLY | O_CLOEXEC);
+			if (fd < 0) goto no_prop;
+			PRINT_D("resetprop: read prop from [%s]\n", path);
+			size_t len = read(fd, value, sizeof(value));
+			value[len] = '\0';  // Null terminate the read value
+		} else {
+no_prop:
 		PRINT_D("resetprop: prop [%s] does not exist\n", name);
 		return NULL;
 		}
-    char value[PROP_VALUE_MAX];
+	} else {
 		__system_property_read_callback2(pi, read_prop_info, value);
+	}
 	PRINT_D("resetprop: getprop [%s]: [%s]\n", name, value);
 	return strdup(value);
 }
 
-static void (*cb)(const char *);
+struct wrapper {
+	void (*func)(const char *, const char *);
+};
 
-static void run_actual_cb(void* cookie, const char *name, const char *value, uint32_t serial) {
+static void cb_wrapper(void* cookie, const char *name, const char *value, uint32_t serial) {
-    cb(name);
+	((wrapper *) cookie)->func(name, value);
 }
 
 static void prop_foreach_cb(const prop_info* pi, void* cookie) {
-    __system_property_read_callback2(pi, run_actual_cb, NULL);
+	__system_property_read_callback2(pi, cb_wrapper, cookie);
 }
 
-void getprop_all(void (*cbk)(const char *name)) {
+class property {
+public:
+	property(const char *n, const char *v) {
+		name = strdup(n);
+		value = strdup(v);
+	}
+	~property() {
+		free((void *)name);
+		free((void *)value);
+	}
+	const char *name;
+	const char *value;
+};
+
+vector prop_list;
+
+static int prop_cmp(const void *p1, const void *p2) {
+	return strcmp((*((property **) p1))->name, (*((property **) p2))->name);
+}
+
+static void print_all_props_cb(const char *name, const char *value) {
+	vec_push_back(&prop_list, new property(name, value));
+}
+
+static void print_all_props(int persist) {
+	void *p;
+	vec_init(&prop_list);
+	getprop_all(print_all_props_cb);
+	if (persist) {
+		// Check all persist props in data
+		DIR *dir = opendir(PERSISTENT_PROPERTY_DIR);
+		struct dirent *entry;
+		while ((entry = readdir(dir))) {
+			if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0 )
+				continue;
+			int found = 0;
+			vec_for_each(&prop_list, p) {
+				if (strcmp(((property *) p)->name, entry->d_name) == 0) {
+					found = 1;
+					break;
+				}
+			}
+			if (!found)
+				vec_push_back(&prop_list, new property(entry->d_name, getprop2(entry->d_name, 1)));
+		}
+	}
+	vec_sort(&prop_list, prop_cmp);
+	vec_for_each(&prop_list, p) {
+		printf("[%s]: [%s]\n", ((property *) p)->name, ((property *) p)->value);
+		delete((property *) p);
+	}
+	vec_destroy(&prop_list);
+}
+
+void getprop_all(void (*callback)(const char*, const char*)) {
 	if (init_resetprop()) return;
-    cb = cbk;
+	struct wrapper wrap = {
-    __system_property_foreach2(prop_foreach_cb, NULL);
+		.func = callback
+	};
+	__system_property_foreach2(prop_foreach_cb, &wrap);
 }
 
 int setprop(const char *name, const char *value) {
@@ -164,13 +259,15 @@ int setprop(const char *name, const char *value) {
 }
 
 int setprop2(const char *name, const char *value, const int trigger) {
+	if (check_legal_property_name(name))
+		return 1;
 	if (init_resetprop()) return -1;
 	int ret;
 
 	prop_info *pi = (prop_info*) __system_property_find2(name);
 	if (pi != NULL) {
 		if (trigger) {
-            if (!strncmp(name, "ro.", 3)) deleteprop(name, trigger);
+			if (strncmp(name, "ro.", 3) == 0) deleteprop(name);
 			ret = __system_property_set2(name, value);
 		} else {
 			ret = __system_property_update2(pi, value, strlen(value));
@@ -193,15 +290,20 @@ int setprop2(const char *name, const char *value, const int trigger) {
 	return ret;
 }
 
-int deleteprop(const char *name, const int trigger) {
+int deleteprop(const char *name) {
-    if (init_resetprop()) return -1;
+	return deleteprop2(name, 1);
-    PRINT_D("resetprop: deleteprop [%s]\n", name);
-    if (trigger && strstr(name, "persist.")) {
-        char buffer[PATH_MAX];
-        snprintf(buffer, sizeof(buffer), "%s/%s", PERSISTENT_PROPERTY_DIR, name);
-        unlink(buffer);
 }
-    return __system_property_del(name);
+
+int deleteprop2(const char *name, const int persist) {
+	if (check_legal_property_name(name))
+		return 1;
+	if (init_resetprop()) return -1;
+	char path[PATH_MAX];
+	path[0] = '\0';
+	PRINT_D("resetprop: deleteprop [%s]\n", name);
+	if (persist && strncmp(name, "persist.", 8) == 0)
+		snprintf(path, sizeof(path), PERSISTENT_PROPERTY_DIR "/%s", name);
+	return __system_property_del(name) && unlink(path);
 }
 
 int read_prop_file(const char* filename, const int trigger) {
@@ -246,59 +348,60 @@ int read_prop_file(const char* filename, const int trigger) {
 }
 
 int resetprop_main(int argc, char *argv[]) {
+	int trigger = 1, persist = 0;
+	char *argv0 = argv[0], *prop;
 
-    int del = 0, file = 0, trigger = 1;
+	--argc;
+	++argv;
 
-    int exp_arg = 2;
+	// Parse flags and -- options
-    char *name, *value, *filename;
+	while (argc && argv[0][0] == '-') {
-
+		for (int idx = 1; 1; ++idx) {
-    if (argc < 3) {
+			switch (argv[0][idx]) {
-        return usage(argv[0]);
+			case '-':
+				if (strcmp(argv[0], "--file") == 0 && argc == 2) {
+					return read_prop_file(argv[1], trigger);
+				} else if (strcmp(argv[0], "--delete") == 0 && argc == 2) {
+					return deleteprop2(argv[1], persist);
+				} else if (strcmp(argv[0], "--help") == 0) {
+					goto usage;
 				}
-
+			case 'v':
-    for (int i = 1; i < argc; ++i) {
-        if (!strcmp("-v", argv[i])) {
 				verbose = 1;
-        } else if (!strcmp("-n", argv[i])) {
+				continue;
+			case 'p':
+				persist = 1;
+				continue;
+			case 'n':
 				trigger = 0;
-        } else if (!strcmp("--file", argv[i])) {
+				continue;
-            file = 1;
+			case '\0':
-            exp_arg = 1;
-        } else if (!strcmp("--delete", argv[i])) {
-            del = 1;
-            exp_arg = 1;
-        } else {
-            if (i + exp_arg > argc) {
-                return usage(argv[0]);
-            }
-            if (file) {
-                filename = argv[i];
 				break;
-            } else {
+			case 'h':
-                if(!is_legal_property_name(argv[i], strlen(argv[i]))) {
+			default:
-                    PRINT_E("Illegal property name: [%s]\n", argv[i]);
+			usage:
-                    return 1;
+				return usage(argv0);
-                }
-                name = argv[i];
-                if (exp_arg > 1) {
-                    if (strlen(argv[i + 1]) >= PROP_VALUE_MAX) {
-                        PRINT_E("Value too long: [%s]\n", argv[i + 1]);
-                        return 1;
-                    }
-                    value = argv[i + 1];
 			}
 			break;
 		}
-        }
+		--argc;
-    }
+		++argv;
-
-    if (file) {
-        return read_prop_file(filename, trigger);
-    } else if (del) {
-        return deleteprop(name, trigger);
-    } else {
-        return setprop2(name, value, trigger);
 	}
 
+	switch (argc) {
+	case 0:
+		print_all_props(persist);
 		return 0;
+	case 1:
+		prop = getprop2(argv[0], persist);
+		if (prop == NULL) return 1;
+		printf("%s\n", prop);
+		free(prop);
+		return 0;
+	case 2:
+		return setprop2(argv[0], argv[1], trigger);
+	default:
+		usage(argv0);
+		return 1;
+	}
 }