X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fsave.c;h=43e76c0b60df13f7fa2ec725c2f22b9d5eb8e2c1;hb=597ada4dcd07f297b2a89bdb265aae39af817b53;hp=c51338e1758c519a19710ed0334699e9f1af04eb;hpb=2fc93c34017b03b792f48f913e117a833ef4a34f;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/save.c b/src/bin/lttng-sessiond/save.c
index c51338e17..43e76c0b6 100644
--- a/src/bin/lttng-sessiond/save.c
+++ b/src/bin/lttng-sessiond/save.c
@@ -1891,11 +1891,12 @@ int save_session(struct ltt_session *session,
 	struct lttng_save_session_attr *attr, lttng_sock_cred *creds)
 {
 	int ret, fd = -1;
-	char config_file_path[PATH_MAX];
+	char config_file_path[LTTNG_PATH_MAX];
 	size_t len;
 	struct config_writer *writer = NULL;
 	size_t session_name_len;
 	const char *provided_path;
+	int file_open_flags = O_CREAT | O_WRONLY | O_TRUNC;
 
 	assert(session);
 	assert(attr);
@@ -1919,7 +1920,7 @@ int save_session(struct ltt_session *session,
 			ret = LTTNG_ERR_SET_URL;
 			goto end;
 		}
-		strncpy(config_file_path, provided_path, len);
+		strncpy(config_file_path, provided_path, sizeof(config_file_path));
 	} else {
 		ssize_t ret_len;
 		char *home_dir = utils_get_user_home_dir(
@@ -1963,24 +1964,32 @@ int save_session(struct ltt_session *session,
 	 * was done just above.
 	 */
 	config_file_path[len++] = '/';
-	strncpy(config_file_path + len, session->name, session_name_len);
+	strncpy(config_file_path + len, session->name, sizeof(config_file_path) - len);
 	len += session_name_len;
 	strcpy(config_file_path + len, DEFAULT_SESSION_CONFIG_FILE_EXTENSION);
 	len += sizeof(DEFAULT_SESSION_CONFIG_FILE_EXTENSION);
 	config_file_path[len] = '\0';
 
-	if (!access(config_file_path, F_OK) && !attr->overwrite) {
-		/* File exists, notify the user since the overwrite flag is off. */
-		ret = LTTNG_ERR_SAVE_FILE_EXIST;
-		goto end;
+	if (!attr->overwrite) {
+		file_open_flags |= O_EXCL;
 	}
 
-	fd = run_as_open(config_file_path, O_CREAT | O_WRONLY | O_TRUNC,
+	fd = run_as_open(config_file_path, file_open_flags,
 		S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP,
 		LTTNG_SOCK_GET_UID_CRED(creds), LTTNG_SOCK_GET_GID_CRED(creds));
 	if (fd < 0) {
 		PERROR("Could not create configuration file");
-		ret = LTTNG_ERR_SAVE_IO_FAIL;
+		switch (errno) {
+		case EEXIST:
+			ret = LTTNG_ERR_SAVE_FILE_EXIST;
+			break;
+		case EACCES:
+			ret = LTTNG_ERR_EPERM;
+			break;
+		default:
+			ret = LTTNG_ERR_SAVE_IO_FAIL;
+			break;
+		}
 		goto end;
 	}