diff mbox series

[v2,05/15] selftests/nolibc: fix up kernel parameters support

Message ID 582776208a75df19d09b8eaafcb6fdad7219abc8.1688078605.git.falcon@tinylab.org
State Superseded
Headers show
Series allow run with minimal kernel config | expand

Commit Message

Zhangjin Wu June 29, 2023, 11:29 p.m. UTC
kernel parameters allow pass two types of strings, one type is like
'noapic', another type is like 'panic=5', the first type is passed as
arguments of the init program, the second type is passed as environment
variables of the init program.

when users pass kernel parameters like this:

    noapic NOLIBC_TEST=syscall

our nolibc-test program will use the test setting from argv[1] and
ignore the one from NOLIBC_TEST environment variable, and at last, it
will print the following line and ignore the whole test setting.

    Ignoring unknown test name 'noapic'

reversing the parsing order does solve the above issue:

    test = getenv("NOLIBC_TEST");
    if (test)
        test = argv[1];

but it still doesn't work with such kernel parameters (without
NOLIBC_TEST environment variable):

    noapic FOO=bar

To support all of the potential kernel parameters, let's verify the test
setting from both of argv[1] and NOLIBC_TEST environment variable.

Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
 tools/testing/selftests/nolibc/nolibc-test.c | 33 ++++++++++++++++++--
 1 file changed, 31 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index 96d170cc9b47..223c00e83abf 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -1063,6 +1063,35 @@  static const struct test test_names[] = {
 	{ 0 }
 };
 
+int is_setting_valid(char *test)
+{
+	int idx, len, test_len, valid = 0;
+	char delimiter;
+
+	if (!test)
+		return valid;
+
+	test_len = strlen(test);
+
+	for (idx = 0; test_names[idx].name; idx++) {
+		len = strlen(test_names[idx].name);
+		if (test_len < len)
+			continue;
+
+		if (strncmp(test, test_names[idx].name, len) != 0)
+			continue;
+
+		delimiter = test[len];
+		if (delimiter != ':' && delimiter != ',' && delimiter != '\0')
+			continue;
+
+		valid = 1;
+		break;
+	}
+
+	return valid;
+}
+
 int main(int argc, char **argv, char **envp)
 {
 	int min = 0;
@@ -1088,10 +1117,10 @@  int main(int argc, char **argv, char **envp)
 	 *    syscall:5-15[:.*],stdlib:8-10
 	 */
 	test = argv[1];
-	if (!test)
+	if (!is_setting_valid(test))
 		test = getenv("NOLIBC_TEST");
 
-	if (test) {
+	if (is_setting_valid(test)) {
 		char *comma, *colon, *dash, *value;
 
 		do {