niceSOFT/systemd: The systemd System and Service Manager

src/test/test-stdio.c

48 строк1 KB

Yu Watanabe

musl: stdio: check if stream is writable earlier in fputs() and friends

14 ноя 2025, 23:10

14 ноя 2025, 23:10384e88a

/* SPDX-License-Identifier: LGPL-2.1-or-later */

#include <stdio.h>

#include "fd-util.h"
#include "tests.h"
#include "tmpfile-util.h"

TEST(read_only) {
        _cleanup_(unlink_tempfilep) char fn[] = "/tmp/test-stdio-read-only-XXXXXX";
        _cleanup_fclose_ FILE *f = NULL;
        _cleanup_close_ int fd = -EBADF;
        int r;

        ASSERT_OK(fd = mkostemp_safe(fn));

        ASSERT_NOT_NULL(f = fopen(fn, "r"));
        ASSERT_ERROR_ERRNO(r = putc('a', f), EBADF);
        ASSERT_EQ(r, EOF);
        f = safe_fclose(f);

        ASSERT_NOT_NULL(f = fopen(fn, "r"));
        ASSERT_ERROR_ERRNO(r = putc_unlocked('a', f), EBADF);
        ASSERT_EQ(r, EOF);
        f = safe_fclose(f);

        ASSERT_NOT_NULL(f = fopen(fn, "r"));
        ASSERT_ERROR_ERRNO(r = fputc('a', f), EBADF);
        ASSERT_EQ(r, EOF);
        f = safe_fclose(f);

        ASSERT_NOT_NULL(f = fopen(fn, "r"));
        ASSERT_ERROR_ERRNO(r = fputc_unlocked('a', f), EBADF);
        ASSERT_EQ(r, EOF);
        f = safe_fclose(f);

        ASSERT_NOT_NULL(f = fopen(fn, "r"));
        ASSERT_ERROR_ERRNO(r = fputs("a", f), EBADF);
        ASSERT_EQ(r, EOF);
        f = safe_fclose(f);

        ASSERT_NOT_NULL(f = fopen(fn, "r"));
        ASSERT_ERROR_ERRNO(r = fputs_unlocked("a", f), EBADF);
        ASSERT_EQ(r, EOF);
        f = safe_fclose(f);
}

DEFINE_TEST_MAIN(LOG_INFO);