X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fbin%2Flttng-relayd%2Fmain.c;h=5f72c32a906f700ec14009766d056ead3e49b375;hp=2836c489ce9647325dc5a8da7d25d18ba0c684b1;hb=2a10de3b3b5a198a1633ff4167a9610c493994c1;hpb=7f5ed73a87449fc7133a2bf7268a7f59f191e155

diff --git a/src/bin/lttng-relayd/main.c b/src/bin/lttng-relayd/main.c
index 2836c489c..5f72c32a9 100644
--- a/src/bin/lttng-relayd/main.c
+++ b/src/bin/lttng-relayd/main.c
@@ -96,7 +96,7 @@ enum relay_connection_status {
 };
 
 /* command line options */
-char *opt_output_path;
+char *opt_output_path, *opt_working_directory;
 static int opt_daemon, opt_background, opt_print_version;
 
 /*
@@ -184,6 +184,7 @@ static struct option long_options[] = {
 	{ "verbose", 0, 0, 'v', },
 	{ "config", 1, 0, 'f' },
 	{ "version", 0, 0, 'V' },
+	{ "working-directory", 1, 0, 'w', },
 	{ NULL, 0, 0, 0, },
 };
 
@@ -311,6 +312,20 @@ static int set_option(int opt, const char *arg, const char *optname)
 			}
 		}
 		break;
+	case 'w':
+		if (lttng_is_setuid_setgid()) {
+			WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
+				"-w, --working-directory");
+		} else {
+			ret = asprintf(&opt_working_directory, "%s", arg);
+			if (ret < 0) {
+				ret = -errno;
+				PERROR("asprintf opt_working_directory");
+				goto end;
+			}
+		}
+		break;
+
 	case 'v':
 		/* Verbose level can increase using multiple -v */
 		if (arg) {
@@ -391,6 +406,23 @@ end:
 	return ret;
 }
 
+static int parse_env_options(void)
+{
+	int ret = 0;
+	char *value = NULL;
+
+	value = lttng_secure_getenv(DEFAULT_LTTNG_RELAYD_WORKING_DIRECTORY_ENV);
+	if (value) {
+		opt_working_directory = strdup(value);
+		if (!opt_working_directory) {
+			ERR("Failed to allocate working directory string (\"%s\")",
+					value);
+			ret = -1;
+		}
+	}
+	return ret;
+}
+
 static int set_options(int argc, char **argv)
 {
 	int c, ret = 0, option_index = 0, retval = 0;
@@ -541,8 +573,8 @@ static void relayd_cleanup(void)
 	if (sessions_ht)
 		lttng_ht_destroy(sessions_ht);
 
-	/* free the dynamically allocated opt_output_path */
 	free(opt_output_path);
+	free(opt_working_directory);
 
 	/* Close thread quit pipes */
 	utils_close_pipe(thread_quit_pipe);
@@ -3671,7 +3703,17 @@ int main(int argc, char **argv)
 	int ret = 0, retval = 0;
 	void *status;
 
-	/* Parse arguments */
+	/* Parse environment variables */
+	ret = parse_env_options();
+	if (ret) {
+		retval = -1;
+		goto exit_options;
+	}
+
+	/*
+	 * Parse arguments.
+	 * Command line arguments overwrite environment.
+	 */
 	progname = argv[0];
 	if (set_options(argc, argv)) {
 		retval = -1;
@@ -3729,6 +3771,14 @@ int main(int argc, char **argv)
 		}
 	}
 
+	if (opt_working_directory) {
+		ret = utils_change_working_directory(opt_working_directory);
+		if (ret) {
+			/* All errors are already logged. */
+			goto exit_options;
+		}
+	}
+
 	sessiond_trace_chunk_registry = sessiond_trace_chunk_registry_create();
 	if (!sessiond_trace_chunk_registry) {
 		ERR("Failed to initialize session daemon trace chunk registry");