Override the session.xsd path with an ENV. variable

[lttng-tools.git] / src / common / config / config.c

diff --git a/src/common/config/config.c b/src/common/config/config.c
index e61791b7d03b01eafad109b66f319421bb1f7e16..8b34d02f1d54500a339f4cb190d58bba1bf6d4b1 100644 (file)
--- a/src/common/config/config.c
+++ b/src/common/config/config.c
@@ -568,13 +568,50 @@ void fini_session_config_validation_ctx(
        memset(ctx, 0, sizeof(struct session_config_validation_ctx));
 }
 
+static
+char *get_session_config_xsd_path()
+{
+       char *xsd_path;
+       const char *base_path = getenv(DEFAULT_SESSION_CONFIG_XSD_PATH_ENV);
+       size_t base_path_len;
+       size_t max_path_len;
+
+       if (!base_path) {
+               base_path = DEFAULT_SESSION_CONFIG_XSD_PATH;
+       }
+
+       base_path_len = strlen(base_path);
+       max_path_len = base_path_len +
+               sizeof(DEFAULT_SESSION_CONFIG_XSD_FILENAME) + 1;
+       xsd_path = zmalloc(max_path_len);
+       if (!xsd_path) {
+               goto end;
+       }
+
+       strncpy(xsd_path, base_path, max_path_len);
+       if (xsd_path[base_path_len - 1] != '/') {
+               xsd_path[base_path_len++] = '/';
+       }
+
+       strncpy(xsd_path + base_path_len, DEFAULT_SESSION_CONFIG_XSD_FILENAME,
+               max_path_len - base_path_len);
+end:
+       return xsd_path;
+}
+
 static
 int init_session_config_validation_ctx(
        struct session_config_validation_ctx *ctx)
 {
        int ret;
+       char *xsd_path = get_session_config_xsd_path();
+
+       if (!xsd_path) {
+               ret = -LTTNG_ERR_NOMEM;
+               goto end;
+       }
 
-       ctx->parser_ctx = xmlSchemaNewParserCtxt(DEFAULT_SESSION_CONFIG_XSD_PATH);
+       ctx->parser_ctx = xmlSchemaNewParserCtxt(xsd_path);
        if (!ctx->parser_ctx) {
                ERR("XSD parser context creation failed");
                ret = -LTTNG_ERR_LOAD_INVALID_CONFIG;
@@ -606,6 +643,7 @@ end:
                fini_session_config_validation_ctx(ctx);
        }
 
+       free(xsd_path);
        return ret;
 }