public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: david.laight.linux@gmail.com
To: "Willy Tarreau" <w@1wt.eu>,
	"Thomas Weißschuh" <linux@weissschuh.net>,
	linux-kernel@vger.kernel.org, "Cheng Li" <lechain@gmail.com>
Cc: David Laight <david.laight.linux@gmail.com>
Subject: [PATCH v4 next 03/23] selftests/nolibc: Return correct value when printf test fails
Date: Mon,  2 Mar 2026 10:17:55 +0000	[thread overview]
Message-ID: <20260302101815.3043-4-david.laight.linux@gmail.com> (raw)
In-Reply-To: <20260302101815.3043-1-david.laight.linux@gmail.com>

From: David Laight <david.laight.linux@gmail.com>

Correctly return 1 (the number of errors) when strcmp()
fails rather than the return value from strncmp() which is the
signed difference between the mismatching characters.

Signed-off-by: David Laight <david.laight.linux@gmail.com>
---

New patch for v4.
Corrects the error reporting for test failures.
But is really replaced by the next patch.

 tools/testing/selftests/nolibc/nolibc-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index 0e8b3b9a86ef..9787e493523c 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -1683,7 +1683,7 @@ static int expect_vfprintf(int llen, int c, const char *expected, const char *fm
 	}
 
 	llen += printf(" \"%s\" = \"%s\"", expected, buf);
-	ret = strncmp(expected, buf, c);
+	ret = strncmp(expected, buf, c) != 0;
 
 	result(llen, ret ? FAIL : OK);
 	return ret;
-- 
2.39.5


  parent reply	other threads:[~2026-03-02 10:18 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-03-02 10:17 [PATCH v4 next 00/23] Enhance printf() david.laight.linux
2026-03-02 10:17 ` [PATCH v4 next 01/23] tools/nolibc: Add _NOLIBC_OPTIMIZER_HIDE_VAR() to compiler.h david.laight.linux
2026-03-07 10:50   ` Willy Tarreau
2026-03-02 10:17 ` [PATCH v4 next 02/23] tools/nolibc/printf: Move snprintf length check to callback david.laight.linux
2026-03-07 10:48   ` Willy Tarreau
2026-03-02 10:17 ` david.laight.linux [this message]
2026-03-02 10:17 ` [PATCH v4 next 04/23] selftests/nolibc: check vsnprintf() output buffer before the length david.laight.linux
2026-03-02 10:17 ` [PATCH v4 next 05/23] selftests/nolibc: Use length of 'expected' string to check snprintf() output david.laight.linux
2026-03-02 10:17 ` [PATCH v4 next 06/23] selftests/nolibc: Check that snprintf() doesn't write beyond the buffer end david.laight.linux
2026-03-02 10:17 ` [PATCH v4 next 07/23] selftests/nolibc: Let EXPECT_VFPRINTF() tests be skipped david.laight.linux
2026-03-02 10:18 ` [PATCH 08/23] selftests/nolibc: Rename w to written in expect_vfprintf() david.laight.linux
2026-03-02 10:18 ` [PATCH v4 next 09/23] tools/nolibc: Implement strerror() in terms of strerror_r() david.laight.linux
2026-03-07 10:18   ` Willy Tarreau
2026-03-07 11:31     ` David Laight
2026-03-07 11:37       ` Willy Tarreau
2026-03-07 16:55         ` David Laight
2026-03-07 17:17           ` Willy Tarreau
2026-03-02 10:18 ` [PATCH v4 next 10/23] tools/nolibc: Rename the 'errnum' parameter to strerror() david.laight.linux
2026-03-07 10:19   ` Willy Tarreau
2026-03-02 10:18 ` [PATCH v4 next 11/23] tools/nolibc/printf: Output pad characters in 16 byte chunks david.laight.linux
2026-03-02 10:18 ` [PATCH 12/23] tools/nolibc/printf: Simplify __nolibc_printf() david.laight.linux
2026-03-02 10:18 ` [PATCH v4 next 13/23] tools/nolibc/printf: Use goto and reduce indentation david.laight.linux
2026-03-07 10:30   ` Willy Tarreau
2026-03-02 10:18 ` [PATCH 14/23] tools/nolibc/printf: Use bit-masks to hold requested flag, length and conversion chars david.laight.linux
2026-03-02 10:18 ` [PATCH v4 next 15/23] tools/nolibc/printf: Add support for length modifiers tzqL and formats iX david.laight.linux
2026-03-02 10:18 ` [PATCH v4 next 16/23] tools/nolibc/printf: Handle "%s" with the numeric formats david.laight.linux
2026-03-07 10:32   ` Willy Tarreau
2026-03-02 10:18 ` [PATCH 17/23] tools/nolibc/printf: Prepend sign to converted number david.laight.linux
2026-03-07 10:40   ` Willy Tarreau
2026-03-02 10:18 ` [PATCH v4 next 18/23] tools/nolibc/printf: Add support for conversion flags space and plus david.laight.linux
2026-03-07 10:46   ` Willy Tarreau
2026-03-02 10:18 ` [PATCH v4 next 19/23] tools/nolibc/printf: Special case 0 and add support for %#x david.laight.linux
2026-03-07 10:46   ` Willy Tarreau
2026-03-02 10:18 ` [PATCH v4 next 20/23] tools/nolibc/printf: Add support for left aligning fields david.laight.linux
2026-03-07 10:46   ` Willy Tarreau
2026-03-02 10:18 ` [PATCH v4 next 21/23] tools/nolibc/printf: Add support for zero padding and field precision david.laight.linux
2026-03-02 10:18 ` [PATCH v4 next 22/23] tools/nolibc/printf: Add support for octal output david.laight.linux
2026-03-07 10:45   ` Willy Tarreau
2026-03-02 10:18 ` [PATCH v4 next 23/23] selftests/nolibc: Use printf variable field widths and precisions david.laight.linux
2026-03-07 10:53 ` [PATCH v4 next 00/23] Enhance printf() Willy Tarreau
2026-03-07 18:02 ` Thomas Weißschuh
2026-03-07 22:03   ` David Laight
2026-03-07 22:20     ` Thomas Weißschuh
2026-03-08  9:23   ` Willy Tarreau

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20260302101815.3043-4-david.laight.linux@gmail.com \
    --to=david.laight.linux@gmail.com \
    --cc=lechain@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@weissschuh.net \
    --cc=w@1wt.eu \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox