ssb: Put the database in (ie, ~/.local/share/tildefriends/db.sqlite) by default. Unless it already exists in the working directory, so that nobody worries they've lost it. #91

src/main.c

@@ -25,6 +25,7 @@
 
 #if defined(__linux__)
 #include <sys/prctl.h>
+#include <sys/stat.h>
 #endif
 
 #if defined(__APPLE__)
@@ -41,7 +42,102 @@
 
 struct backtrace_state* g_backtrace_state;
 
+#if !defined(TARGET_OS_IPHONE)
+static const char* _get_db_path()
+{
 	const char* k_db_path_default = "db.sqlite";
+#if defined(__linux__)
+	if (stat(k_db_path_default, &(struct stat) { 0 }) == 0)
+	{
+		return tf_strdup(k_db_path_default);
+	}
+	else
+	{
+		char buffer[32];
+
+		char* data_home = NULL;
+		size_t size = sizeof(buffer);
+		int r = uv_os_getenv("XDG_DATA_HOME", buffer, &size);
+		if (r == 0 || r == UV_ENOBUFS)
+		{
+			size++;
+			data_home = alloca(size);
+			if (uv_os_getenv("XDG_DATA_HOME", data_home, &size) != 0)
+			{
+				data_home = NULL;
+			}
+		}
+
+		if (!data_home)
+		{
+			size = sizeof(buffer);
+			r = uv_os_getenv("HOME", buffer, &size);
+			if (r == 0 || r == UV_ENOBUFS)
+			{
+				size++;
+				char* home = alloca(size);
+				r = uv_os_getenv("HOME", home, &size);
+				if (r == 0)
+				{
+					size = snprintf(NULL, 0, "%s/.local/share", home) + 1;
+					data_home = alloca(size);
+					snprintf(data_home, size, "%s/.local/share", home);
+				}
+			}
+		}
+
+		if (data_home)
+		{
+			size = snprintf(NULL, 0, "%s/tildefriends/db.sqlite", data_home) + 1;
+			char* path = alloca(size);
+			snprintf(path, size, "%s/tildefriends/db.sqlite", data_home);
+			return tf_strdup(path);
+		}
+	}
+#endif
+	return tf_strdup(k_db_path_default);
+}
+
+static void _create_directories_for_file(const char* path, int mode)
+{
+	if (stat(path, &(struct stat) { 0 }) == 0)
+	{
+		/* It already exists.  OK. */
+		return;
+	}
+
+	size_t length = strlen(path) + 1;
+	char* copy = alloca(length);
+	memcpy(copy, path, length);
+#if defined(_WIN32)
+	for (char* c = copy; *c; c++)
+	{
+		if (*c == '\\')
+		{
+			*c = '/';
+		}
+	}
+#endif
+	char* slash = copy;
+	while (slash)
+	{
+		slash = strchr(slash + 1, '/');
+		if (slash)
+		{
+			*slash = '\0';
+#if defined(_WIN32)
+			if (mkdir(copy) == 0)
+#else
+			if (mkdir(copy, mode) == 0)
+#endif
+			{
+				tf_printf("Created directory %s.\n", copy);
+			}
+			*slash = '/';
+		}
+	}
+}
+#endif
 
 #if !TARGET_OS_IPHONE && !defined(__ANDROID__)
 static int _tf_command_export(const char* file, int argc, char* argv[]);
@@ -131,7 +227,8 @@ static int _tf_command_test(const char* file, int argc, char* argv[])
 static int _tf_command_import(const char* file, int argc, char* argv[])
 {
 	const char* user = "import";
-	const char* db_path = k_db_path_default;
+	const char* default_db_path = _get_db_path();
+	const char* db_path = default_db_path;
 	bool show_usage = false;
 
 	while (!show_usage)
@@ -169,11 +266,13 @@ static int _tf_command_import(const char* file, int argc, char* argv[])
 		tf_printf("\n%s import [options] [paths...]\n\n", file);
 		tf_printf("options:\n");
 		tf_printf("  -u, --user user          User into whose account apps will be imported (default: \"import\").\n");
-		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", k_db_path_default);
+		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", default_db_path);
 		tf_printf("  -h, --help               Show this usage information.\n");
+		tf_free((void*)default_db_path);
 		return EXIT_FAILURE;
 	}
 
+	_create_directories_for_file(db_path, 0700);
 	tf_ssb_t* ssb = tf_ssb_create(NULL, NULL, db_path, NULL);
 	if (optind < argc)
 	{
@@ -189,13 +288,15 @@ static int _tf_command_import(const char* file, int argc, char* argv[])
 		tf_ssb_import(ssb, user, "apps");
 	}
 	tf_ssb_destroy(ssb);
+	tf_free((void*)default_db_path);
 	return EXIT_SUCCESS;
 }
 
 static int _tf_command_export(const char* file, int argc, char* argv[])
 {
 	const char* user = "core";
-	const char* db_path = k_db_path_default;
+	const char* default_db_path = _get_db_path();
+	const char* db_path = default_db_path;
 	bool show_usage = false;
 
 	while (!show_usage)
@@ -233,10 +334,11 @@ static int _tf_command_export(const char* file, int argc, char* argv[])
 		tf_printf("\n%s export [options] [paths...]\n\n", file);
 		tf_printf("options:\n");
 		tf_printf("  -u, --user user          User from whose account apps will be exported (default: \"core\").\n");
-		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", k_db_path_default);
+		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", default_db_path);
 		tf_printf("  -h, --help               Show this usage information.\n");
 		tf_printf("\n");
 		tf_printf("paths                      Paths of apps to export (example: /~core/ssb /~user/app).\n");
+		tf_free((void*)default_db_path);
 		return EXIT_FAILURE;
 	}
 
@@ -271,6 +373,7 @@ static int _tf_command_export(const char* file, int argc, char* argv[])
 		}
 	}
 	tf_ssb_destroy(ssb);
+	tf_free((void*)default_db_path);
 	return EXIT_SUCCESS;
 }
 
@@ -298,7 +401,8 @@ static int _tf_command_publish(const char* file, int argc, char* argv[])
 {
 	const char* user = NULL;
 	const char* identity = NULL;
-	const char* db_path = k_db_path_default;
+	const char* default_db_path = _get_db_path();
+	const char* db_path = default_db_path;
 	const char* content = NULL;
 	bool show_usage = false;
 
@@ -346,14 +450,16 @@ static int _tf_command_publish(const char* file, int argc, char* argv[])
 		tf_printf("options:\n");
 		tf_printf("  -u, --user user          User owning identity with which to publish.\n");
 		tf_printf("  -i, --id identity        Identity with which to publish message.\n");
-		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", k_db_path_default);
+		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", default_db_path);
 		tf_printf("  -c, --content json       JSON content of message to publish.\n");
 		tf_printf("  -h, --help               Show this usage information.\n");
+		tf_free((void*)default_db_path);
 		return EXIT_FAILURE;
 	}
 
 	int result = EXIT_FAILURE;
 	tf_printf("Posting %s as account %s belonging to %s...\n", content, identity, user);
+	_create_directories_for_file(db_path, 0700);
 	tf_ssb_t* ssb = tf_ssb_create(NULL, NULL, db_path, NULL);
 	uint8_t private_key[512] = { 0 };
 	if (tf_ssb_db_identity_get_private_key(ssb, user, identity, private_key, sizeof(private_key)))
@@ -386,12 +492,14 @@ static int _tf_command_publish(const char* file, int argc, char* argv[])
 		tf_printf("Did not find private key for identity %s belonging to %s.\n", identity, user);
 	}
 	tf_ssb_destroy(ssb);
+	tf_free((void*)default_db_path);
 	return result;
 }
 
 static int _tf_command_store_blob(const char* file, int argc, char* argv[])
 {
-	const char* db_path = k_db_path_default;
+	const char* default_db_path = _get_db_path();
+	const char* db_path = default_db_path;
 	const char* file_path = NULL;
 	bool show_usage = false;
 
@@ -429,9 +537,10 @@ static int _tf_command_store_blob(const char* file, int argc, char* argv[])
 	{
 		tf_printf("\n%s store_blob [options]\n\n", file);
 		tf_printf("options:\n");
-		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", k_db_path_default);
+		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", default_db_path);
 		tf_printf("  -f, --file file_path     Path to file to add to the blob store.\n");
 		tf_printf("  -h, --help               Show this usage information.\n");
+		tf_free((void*)default_db_path);
 		return EXIT_FAILURE;
 	}
 
@@ -441,6 +550,7 @@ static int _tf_command_store_blob(const char* file, int argc, char* argv[])
 	if (!blob_file)
 	{
 		tf_printf("Failed to open %s: %s.\n", file_path, strerror(errno));
+		tf_free((void*)default_db_path);
 		return EXIT_FAILURE;
 	}
 
@@ -464,11 +574,13 @@ static int _tf_command_store_blob(const char* file, int argc, char* argv[])
 		tf_printf("Failed to read %s: %s.\n", file_path, strerror(errno));
 		fclose(blob_file);
 		tf_free(data);
+		tf_free((void*)default_db_path);
 		return EXIT_FAILURE;
 	}
 	fclose(blob_file);
 
 	char id[256];
+	_create_directories_for_file(db_path, 0700);
 	tf_ssb_t* ssb = tf_ssb_create(NULL, NULL, db_path, NULL);
 	if (tf_ssb_db_blob_store(ssb, (const uint8_t*)data, size, id, sizeof(id), NULL))
 	{
@@ -476,13 +588,15 @@ static int _tf_command_store_blob(const char* file, int argc, char* argv[])
 	}
 	tf_ssb_destroy(ssb);
 	tf_free(data);
+	tf_free((void*)default_db_path);
 	return EXIT_SUCCESS;
 }
 
 static int _tf_command_verify(const char* file, int argc, char* argv[])
 {
 	const char* identity = NULL;
-	const char* db_path = k_db_path_default;
+	const char* default_db_path = _get_db_path();
+	const char* db_path = default_db_path;
 	bool show_usage = false;
 
 	while (!show_usage)
@@ -520,8 +634,9 @@ static int _tf_command_verify(const char* file, int argc, char* argv[])
 		tf_printf("\n%s import [options] [paths...]\n\n", file);
 		tf_printf("options:\n");
 		tf_printf("  -i, --identity identity  Identity to verify.\n");
-		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", k_db_path_default);
+		tf_printf("  -d, --db-path db_path    SQLite database path (default: %s).\n", default_db_path);
 		tf_printf("  -h, --help               Show this usage information.\n");
+		tf_free((void*)default_db_path);
 		return EXIT_FAILURE;
 	}
 
@@ -529,6 +644,7 @@ static int _tf_command_verify(const char* file, int argc, char* argv[])
 	tf_ssb_t* ssb = tf_ssb_create(NULL, NULL, db_path, NULL);
 	bool verified = tf_ssb_db_verify(ssb, identity);
 	tf_ssb_destroy(ssb);
+	tf_free((void*)default_db_path);
 	return verified ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 #endif
@@ -673,13 +789,14 @@ static void _shed_privileges()
 
 static int _tf_command_run(const char* file, int argc, char* argv[])
 {
+	const char* default_db_path = _get_db_path();
 	tf_run_args_t args = {
 		.count = 1,
 		.script = "core/core.js",
 		.http_port = 12345,
 		.https_port = 12346,
 		.ssb_port = 8008,
-		.db_path = k_db_path_default,
+		.db_path = default_db_path,
 	};
 	bool show_usage = false;
 
@@ -764,7 +881,7 @@ static int _tf_command_run(const char* file, int argc, char* argv[])
 		tf_printf("  -b, --ssb-port port        Port on which to run SSB (default: 8008, 0 disables).\n");
 		tf_printf("  -p, --http-port port       Port on which to run Tilde Friends web server (default: 12345).\n");
 		tf_printf("  -q, --https-port port      Port on which to run secure Tilde Friends web server (default: 12346).\n");
-		tf_printf("  -d, --db-path path         SQLite database path (default: %s).\n", k_db_path_default);
+		tf_printf("  -d, --db-path path         SQLite database path (default: %s).\n", default_db_path);
 		tf_printf("  -k, --ssb-network-key key  SSB network key to use.\n");
 		tf_printf("  -n, --count count          Number of instances to run.\n");
 		tf_printf("  -a, --args args            Arguments of the format key=value,foo=bar,verbose=true.\n");
@@ -772,6 +889,7 @@ static int _tf_command_run(const char* file, int argc, char* argv[])
 		tf_printf("  -z, --zip path             Zip archive from which to load files.\n");
 		tf_printf("  -v, --verbose              Log raw messages.\n");
 		tf_printf("  -h, --help                 Show this usage information.\n");
+		tf_free((void*)default_db_path);
 		return EXIT_FAILURE;
 	}
 
@@ -780,6 +898,7 @@ static int _tf_command_run(const char* file, int argc, char* argv[])
 	setpgid(0, 0);
 #endif
 
+	_create_directories_for_file(args.db_path, 0700);
 	if (args.count == 1)
 	{
 		result = _tf_run_task(&args, 0);
@@ -807,6 +926,7 @@ static int _tf_command_run(const char* file, int argc, char* argv[])
 		tf_free(data);
 		tf_free(threads);
 	}
+	tf_free((void*)default_db_path);
 	return result;
 }
 
@@ -1088,7 +1208,7 @@ void tf_run_thread_start(const char* zip_path)
 		.http_port = 12345,
 		.https_port = 12346,
 		.ssb_port = 8008,
-		.db_path = k_db_path_default,
+		.db_path = "db.sqlite",
 		.one_proc = true,
 		.zip = zip_path,
 	};