[LTP] [PATCH v2 1/4] lib/tst_kconfig: Modify the return type of tst_kconfig_check function

[Yang Xu]

So this function can be used to detect whether the function succeeded in shell
api by its return value.

Signed-off-by: Yang Xu <xuyang2018.jy@fujitsu.com>
---
 include/tst_kconfig.h |  5 +++--
 lib/tst_kconfig.c     | 21 ++++++++++++---------
 lib/tst_test.c        |  4 ++--
 3 files changed, 17 insertions(+), 13 deletions(-)

diff --git a/include/tst_kconfig.h b/include/tst_kconfig.h
index 1bb21fea8..cc0908ea8 100644
--- a/include/tst_kconfig.h
+++ b/include/tst_kconfig.h
@@ -44,7 +44,8 @@ void tst_kconfig_read(struct tst_kconfig_var vars[], size_t vars_len);
 
 /**
  * Checks if required kernel configuration options are set in the kernel
- * config and exits the test with TCONF if at least one is missing.
+ * config. Return 0 if every config is satisfied and return 1 if at least
+ * one is missing.
  *
  * The config options can be passed in two different formats, either
  * "CONFIG_FOO" in which case the option has to be set in order to continue the
@@ -53,6 +54,6 @@ void tst_kconfig_read(struct tst_kconfig_var vars[], size_t vars_len);
  *
  * @param kconfigs NULL-terminated array of config strings needed for the testrun.
  */
-void tst_kconfig_check(const char *const kconfigs[]);
+int tst_kconfig_check(const char *const kconfigs[]);
 
 #endif	/* TST_KCONFIG_H__ */
diff --git a/lib/tst_kconfig.c b/lib/tst_kconfig.c
index d433b8cf6..dc7decff9 100644
--- a/lib/tst_kconfig.c
+++ b/lib/tst_kconfig.c
@@ -478,22 +478,26 @@ static void dump_vars(const struct tst_expr *expr)
 	}
 }
 
-void tst_kconfig_check(const char *const kconfigs[])
+int tst_kconfig_check(const char *const kconfigs[])
 {
 	size_t expr_cnt = array_len(kconfigs);
 	struct tst_expr *exprs[expr_cnt];
 	unsigned int i, var_cnt;
-	int abort_test = 0;
+	int ret = 0;
 
 	for (i = 0; i < expr_cnt; i++) {
 		exprs[i] = tst_bool_expr_parse(kconfigs[i]);
 
-		if (!exprs[i])
-			tst_brk(TBROK, "Invalid kconfig expression!");
+		if (!exprs[i]) {
+			tst_res(TWARN, "Invalid kconfig expression!");
+			return 1;
+		}
 	}
 
-	if (validate_vars(exprs, expr_cnt))
-		tst_brk(TBROK, "Invalid kconfig variables!");
+	if (validate_vars(exprs, expr_cnt)) {
+		tst_res(TWARN, "Invalid kconfig variables!");
+		return 1;
+	}
 
 	var_cnt = get_var_cnt(exprs, expr_cnt);
 	struct tst_kconfig_var vars[var_cnt];
@@ -506,7 +510,7 @@ void tst_kconfig_check(const char *const kconfigs[])
 		int val = tst_bool_expr_eval(exprs[i], map);
 
 		if (val != 1) {
-			abort_test = 1;
+			ret = 1;
 			tst_res(TINFO, "Constraint '%s' not satisfied!", kconfigs[i]);
 			dump_vars(exprs[i]);
 		}
@@ -519,8 +523,7 @@ void tst_kconfig_check(const char *const kconfigs[])
 			free(vars[i].val);
 	}
 
-	if (abort_test)
-		tst_brk(TCONF, "Aborting due to unsuitable kernel config, see above!");
+	return ret;
 }
 
 char tst_kconfig_get(const char *confname)
diff --git a/lib/tst_test.c b/lib/tst_test.c
index 9fea7263a..d5cefadaa 100644
--- a/lib/tst_test.c
+++ b/lib/tst_test.c
@@ -1025,8 +1025,8 @@ static void do_setup(int argc, char *argv[])
 
 	parse_opts(argc, argv);
 
-	if (tst_test->needs_kconfigs)
-		tst_kconfig_check(tst_test->needs_kconfigs);
+	if (tst_test->needs_kconfigs && tst_kconfig_check(tst_test->needs_kconfigs))
+		tst_brk(TCONF, "Aborting due to unsuitable kernel config, see above!");
 
 	if (tst_test->needs_root && geteuid() != 0)
 		tst_brk(TCONF, "Test needs to be run as root");
-- 
2.23.0