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/*
* Based on the OpenBSD test
* Copyright (c) 2011 Martin Pieuchot <mpi@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: t_open_memstream.c,v 1.2 2014/10/19 11:17:43 justin Exp $");
#include <atf-c.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
ATF_TC(test_open_memstream);
ATF_TC_HEAD(test_open_memstream, tc)
{
atf_tc_set_md_var(tc, "descr", "Test open_memstream functionality");
}
#define OFFSET 16384
const char start[] = "start";
const char hello[] = "hello";
ATF_TC_BODY(test_open_memstream, tc)
{
FILE *fp;
char *buf = (char *)0xff;
size_t size = 0;
off_t off;
int i;
fp = open_memstream(&buf, &size);
ATF_REQUIRE(fp != NULL);
off = ftello(fp);
ATF_CHECK(off == 0);
ATF_CHECK(fflush(fp) == 0);
ATF_CHECK(size == 0);
ATF_CHECK(buf != (char *)0xff);
ATF_CHECK(fseek(fp, -6, SEEK_SET) == -1);
ATF_CHECK(fseek(fp, OFFSET, SEEK_SET) == 0);
ATF_CHECK(fprintf(fp, hello) != EOF);
ATF_CHECK(fflush(fp) != EOF);
ATF_CHECK(size == OFFSET + sizeof(hello)-1);
ATF_CHECK(fseek(fp, 0, SEEK_SET) == 0);
ATF_CHECK(fprintf(fp, start) != EOF);
ATF_CHECK(fflush(fp) != EOF);
ATF_CHECK(size == sizeof(start)-1);
/* Needed for sparse files */
ATF_CHECK(strncmp(buf, start, sizeof(start)-1) == 0);
for (i = sizeof(start)-1; i < OFFSET; i++)
ATF_CHECK(buf[i] == '\0');
ATF_CHECK(memcmp(buf + OFFSET, hello, sizeof(hello)-1) == 0);
/* verify that simply seeking past the end doesn't increase the size */
ATF_CHECK(fseek(fp, 100, SEEK_END) == 0);
ATF_CHECK(fflush(fp) != EOF);
ATF_CHECK(size == OFFSET + sizeof(hello)-1);
ATF_CHECK(fseek(fp, 8, SEEK_SET) == 0);
ATF_CHECK(ftell(fp) == 8);
/* Try to seek backward */
ATF_CHECK(fseek(fp, -1, SEEK_CUR) == 0);
ATF_CHECK(ftell(fp) == 7);
ATF_CHECK(fseek(fp, 5, SEEK_CUR) == 0);
ATF_CHECK(fclose(fp) != EOF);
ATF_CHECK(size == 12);
free(buf);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, test_open_memstream);
return atf_no_error();
}
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