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[114.145.5.195]) by smtp.googlemail.com with ESMTPSA id 98e67ed59e1d1-35fd3203a55sm2179600a91.14.2026.04.15.07.32.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2026 07:32:44 -0700 (PDT) From: Daniel Palmer To: w@1wt.eu, linux@weissschuh.net Cc: linux-kernel@vger.kernel.org, Daniel Palmer Subject: [PATCH 2/2] selftests/nolibc: Add a very basic test for fallocate() Date: Wed, 15 Apr 2026 23:32:25 +0900 Message-ID: <20260415143225.561998-3-daniel@thingy.jp> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260415143225.561998-1-daniel@thingy.jp> References: <20260415143225.561998-1-daniel@thingy.jp> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Create a tmp file, fallocate() to make it a bit bigger, check the size is what was expected. Signed-off-by: Daniel Palmer --- tools/testing/selftests/nolibc/nolibc-test.c | 33 ++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c index d3c4facb54c0..066f436561e7 100644 --- a/tools/testing/selftests/nolibc/nolibc-test.c +++ b/tools/testing/selftests/nolibc/nolibc-test.c @@ -896,6 +896,38 @@ int test_getpagesize(void) return !c; } +int test_fallocate(void) +{ + struct stat st; + int fd, r; + + /* Create a new tmp file */ + fd = open("/tmp", O_TMPFILE | O_RDWR, 0644); + if (fd == -1) + return -1; + + /* Expand it to 42 bytes */ + r = fallocate(fd, 0, 0, 42); + if (r) + goto close_tmpfile; + + /* Get the new stat */ + r = fstat(fd, &st); + if (r) + goto close_tmpfile; + + /* It should be 42 bytes long */ + if (st.st_size != 42) { + r = -1; + goto close_tmpfile; + } + +close_tmpfile: + close(fd); + + return r; +} + int test_file_stream(void) { FILE *f; @@ -1442,6 +1474,7 @@ int run_syscall(int min, int max) CASE_TEST(dup3_0); tmp = dup3(0, 100, 0); EXPECT_SYSNE(1, tmp, -1); close(tmp); break; CASE_TEST(dup3_m1); tmp = dup3(-1, 100, 0); EXPECT_SYSER(1, tmp, -1, EBADF); if (tmp != -1) close(tmp); break; CASE_TEST(execve_root); EXPECT_SYSER(1, execve("/", (char*[]){ [0] = "/", [1] = NULL }, NULL), -1, EACCES); break; + CASE_TEST(fallocate); EXPECT_SYSZR(1, test_fallocate()); break; CASE_TEST(fchdir_stdin); EXPECT_SYSER(1, fchdir(STDIN_FILENO), -1, ENOTDIR); break; CASE_TEST(fchdir_badfd); EXPECT_SYSER(1, fchdir(-1), -1, EBADF); break; CASE_TEST(file_stream); EXPECT_SYSZR(1, test_file_stream()); break; -- 2.51.0