Make MagiskHide work without magisk.img

jni/daemon/bootstages.c

@@ -589,7 +589,7 @@ void post_fs_data(int client) {
 	// Trim, mount magisk.img, which will also travel through the modules
 	// After this, it will create the module list
 	if (prepare_img())
-		goto unblock;
+		goto core_only; // Mounting fails, we can only do core only stuffs
 
 	// Run common scripts
 	LOGI("* Running post-fs-data.d scripts\n");

jni/daemon/daemon.c

@@ -40,6 +40,7 @@ static void *request_handler(void *args) {
 	case STOP_MAGISKHIDE:
 	case ADD_HIDELIST:
 	case RM_HIDELIST:
+	case LS_HIDELIST:
 	case POST_FS:
 	case POST_FS_DATA:
 	case LATE_START:
@@ -65,6 +66,9 @@ static void *request_handler(void *args) {
 	case RM_HIDELIST:
 		rm_hide_list(client);
 		break;
+	case LS_HIDELIST:
+		ls_hide_list(client);
+		break;
 	case SUPERUSER:
 		su_daemon_receiver(client);
 		break;

jni/include/daemon.h

@@ -15,6 +15,7 @@ typedef enum {
 	STOP_MAGISKHIDE,
 	ADD_HIDELIST,
 	RM_HIDELIST,
+	LS_HIDELIST,
 	SUPERUSER,
 	CHECK_VERSION,
 	CHECK_VERSION_CODE,
@@ -69,6 +70,7 @@ void launch_magiskhide(int client);
 void stop_magiskhide(int client);
 void add_hide_list(int client);
 void rm_hide_list(int client);
+void ls_hide_list(int client);
 
 /*************
  * Superuser *

jni/magiskhide/hide_utils.c

@@ -140,10 +140,7 @@ int add_list(char *proc) {
 	pthread_mutex_unlock(&hide_lock);
 
 	pthread_mutex_lock(&file_lock);
-	if (vector_to_file(HIDELIST, hide_list)) {
-		pthread_mutex_unlock(&file_lock);
-		return DAEMON_ERROR;
-	}
+	vector_to_file(HIDELIST, hide_list); // Do not complain if file not found
 	pthread_mutex_unlock(&file_lock);
 	return DAEMON_SUCCESS;
 }
@@ -184,8 +181,7 @@ int rm_list(char *proc) {
 
 		ret = DAEMON_SUCCESS;
 		pthread_mutex_lock(&file_lock);
-		if (vector_to_file(HIDELIST, hide_list))
-			ret = DAEMON_ERROR;
+		vector_to_file(HIDELIST, hide_list); // Do not complain if file not found
 		pthread_mutex_unlock(&file_lock);
 	} else {
 		ret = HIDE_ITEM_NOT_EXIST;
@@ -241,3 +237,18 @@ void rm_hide_list(int client) {
 	write_int(client, rm_list(proc));
 	close(client);
 }
+
+void ls_hide_list(int client) {
+	err_handler = do_nothing;
+	if (!hideEnabled) {
+		write_int(client, HIDE_NOT_ENABLED);
+		return;
+	}
+	write_int(client, DAEMON_SUCCESS);
+	write_int(client, vec_size(hide_list));
+	char *s;
+	vec_for_each(hide_list, s) {
+		write_string(client, s);
+	}
+	close(client);
+}

jni/magiskhide/magiskhide.c

@@ -123,15 +123,7 @@ int magiskhide_main(int argc, char *argv[]) {
 	} else if (strcmp(argv[1], "--rm") == 0 && argc > 2) {
 		req = RM_HIDELIST;
 	} else if (strcmp(argv[1], "--ls") == 0) {
-		FILE *fp = fopen(HIDELIST, "r");
-		if (fp == NULL)
-			return 1;
-		char buffer[512];
-		while (fgets(buffer, sizeof(buffer), fp)) {
-			printf("%s", buffer);
-		}
-		fclose(fp);
-		return 0;
+		req = LS_HIDELIST;
 	}
 	int fd = connect_daemon();
 	write_int(fd, req);
@@ -139,28 +131,38 @@ int magiskhide_main(int argc, char *argv[]) {
 		write_string(fd, argv[2]);
 	}
 	daemon_response code = read_int(fd);
-	close(fd);
 	switch (code) {
 	case DAEMON_ERROR:
 		fprintf(stderr, "Error occured in daemon...\n");
-		break;
+		return code;
 	case DAEMON_SUCCESS:
 		break;
 	case ROOT_REQUIRED:
 		fprintf(stderr, "Root is required for this operation\n");
-		break;
+		return code;
 	case HIDE_NOT_ENABLED:
 		fprintf(stderr, "Magisk hide is not enabled yet\n");
-		break;
+		return code;
 	case HIDE_IS_ENABLED:
 		fprintf(stderr, "Magisk hide is already enabled\n");
-		break;
+		return code;
 	case HIDE_ITEM_EXIST:
 		fprintf(stderr, "Process [%s] already exists in hide list\n", argv[2]);
-		break;
+		return code;
 	case HIDE_ITEM_NOT_EXIST:
 		fprintf(stderr, "Process [%s] does not exist in hide list\n", argv[2]);
-		break;
+		return code;
 	}
-	return code;
+
+	if (req == LS_HIDELIST) {
+		int argc = read_int(fd);
+		for (int i = 0; i < argc; ++i) {
+			char *s = read_string(fd);
+			printf("%s\n", s);
+			free(s);
+		}
+	}
+	close(fd);
+
+	return 0;
 }

jni/utils/misc.c

@@ -70,7 +70,7 @@ int file_to_vector(const char* filename, struct vector *v) {
 	size_t len = 0;
 	ssize_t read;
 
-	FILE *fp = fopen(filename, "r");
+	FILE *fp = xfopen(filename, "r");
 	if (fp == NULL)
 		return 1;