diff options
Diffstat (limited to 'lib/libc/stdio/t_fflush.c')
| -rw-r--r-- | lib/libc/stdio/t_fflush.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/lib/libc/stdio/t_fflush.c b/lib/libc/stdio/t_fflush.c new file mode 100644 index 000000000000..766070c907fb --- /dev/null +++ b/lib/libc/stdio/t_fflush.c @@ -0,0 +1,171 @@ +/* $NetBSD: t_fflush.c,v 1.1 2011/09/11 05:15:55 jruoho Exp $ */ + +/*- + * Copyright (c) 2011 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jukka Ruohonen. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ +#include <sys/cdefs.h> +__RCSID("$NetBSD: t_fflush.c,v 1.1 2011/09/11 05:15:55 jruoho Exp $"); + +#include <atf-c.h> +#include <errno.h> +#include <stdio.h> +#include <unistd.h> + +static const char *path = "fflush"; + +ATF_TC_WITH_CLEANUP(fflush_err); +ATF_TC_HEAD(fflush_err, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test errors from fflush(3)"); +} + +ATF_TC_BODY(fflush_err, tc) +{ + FILE *f; + + f = fopen(path, "w"); + + ATF_REQUIRE(f != NULL); + ATF_REQUIRE(fflush(NULL) == 0); + ATF_REQUIRE(fclose(f) == 0); + + f = fopen(path, "r"); + ATF_REQUIRE(f != NULL); + + /* + * In NetBSD the call should fail if the supplied + * parameteris not an open stream or the stream is + * not open for writing. + */ + errno = 0; + ATF_REQUIRE_ERRNO(EBADF, fflush(f) == EOF); + + ATF_REQUIRE(fclose(f) == 0); + + errno = 0; + ATF_REQUIRE_ERRNO(EBADF, fflush(f) == EOF); + + (void)unlink(path); +} + +ATF_TC_CLEANUP(fflush_err, tc) +{ + (void)unlink(path); +} + +ATF_TC_WITH_CLEANUP(fflush_seek); +ATF_TC_HEAD(fflush_seek, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test file offsets with fflush(3)"); +} + +ATF_TC_BODY(fflush_seek, tc) +{ + char buf[12]; + int fd = -1; + FILE *f; + + /* + * IEEE Std 1003.1-2008: + * + * "For a stream open for reading, if the file + * is not already at EOF, and the file is one + * capable of seeking, the file offset of the + * underlying open file description shall be + * adjusted so that the next operation on the + * open file description deals with the byte + * after the last one read from or written to + * the stream being flushed." + */ + f = fopen(path, "w"); + ATF_REQUIRE(f != NULL); + + ATF_REQUIRE(fwrite("garbage", 1, 7, f) == 7); + ATF_REQUIRE(fclose(f) == 0); + + f = fopen(path, "r+"); + ATF_REQUIRE(f != NULL); + + fd = fileno(f); + ATF_REQUIRE(fd != -1); + + ATF_REQUIRE(fread(buf, 1, 3, f) == 3); + ATF_REQUIRE(fflush(f) == 0); + ATF_REQUIRE(fseek(f, 0, SEEK_CUR) == 0); + + /* + * Verify that the offsets are right and that + * a read operation resumes at the correct location. + */ + ATF_REQUIRE(ftell(f) == 3); + ATF_REQUIRE(lseek(fd, 0, SEEK_CUR) == 3); + ATF_REQUIRE(fgetc(f) == 'b'); + + ATF_REQUIRE(fclose(f) == 0); + ATF_REQUIRE(unlink(path) == 0); +} + +ATF_TC_CLEANUP(fflush_seek, tc) +{ + (void)unlink(path); +} + +ATF_TC_WITH_CLEANUP(fpurge_err); +ATF_TC_HEAD(fpurge_err, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test errors from fpurge(3)"); +} + +ATF_TC_BODY(fpurge_err, tc) +{ + FILE *f; + + f = fopen(path, "w"); + ATF_REQUIRE(f != NULL); + ATF_REQUIRE(fclose(f) == 0); + + errno = 0; + ATF_REQUIRE_ERRNO(EBADF, fpurge(f) == EOF); + + (void)unlink(path); +} + +ATF_TC_CLEANUP(fpurge_err, tc) +{ + (void)unlink(path); +} + +ATF_TP_ADD_TCS(tp) +{ + + ATF_TP_ADD_TC(tp, fflush_err); + ATF_TP_ADD_TC(tp, fflush_seek); + ATF_TP_ADD_TC(tp, fpurge_err); + + return atf_no_error(); +} |