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/* $OpenBSD: open_memstreamtest.c,v 1.1 2013/01/01 17:43:07 mpi Exp $ */
/*
* 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 <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define OFFSET 16384
int
main(void)
{
FILE *fp;
char *buf = (char *)0xff;
size_t size = 0;
off_t off;
int i = 0, failures = 0;
if ((fp = open_memstream(&buf, &size)) == NULL) {
warn("open_memstream failed");
return (1);
}
off = ftello(fp);
if (off != 0) {
warnx("ftello failed. (1)");
failures++;
}
if (fflush(fp) != 0) {
warnx("fflush failed. (2)");
failures++;
}
if (size != 0) {
warnx("string should be empty. (3)");
failures++;
}
if (buf == (char *)0xff) {
warnx("buf not updated. (4)");
failures++;
}
if (fseek(fp, OFFSET, SEEK_SET) != 0) {
warnx("failed to fseek. (5)");
failures++;
}
if (fprintf(fp, "hello") == EOF) {
warnx("fprintf failed. (6)");
failures++;
}
if (fclose(fp) == EOF) {
warnx("fclose failed. (7)");
failures++;
}
if (size != OFFSET + 5) {
warnx("failed, size %zu should be %u\n", size, OFFSET + 5);
failures++;
}
/* Needed for sparse files */
while (i != OFFSET)
if (buf[i++] != '\0') {
warnx("failed, buffer non zero'ed (offset %d). (8)", i);
failures++;
break;
}
if (memcmp(buf + OFFSET, "hello", 5) != 0) {
warnx("written string incorrect. (9)");
failures++;
}
free(buf);
return (failures);
}
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