120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Copyright (c) 2018 FUJITSU LIMITED. All rights reserved.
|
|
* Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
|
|
*/
|
|
|
|
/*
|
|
* Description:
|
|
* Testcase to check the basic functionality of the preadv2(2).
|
|
* 1) If the file offset argument is not -1, preadv2() should succeed
|
|
* in reading the expected content of data and the file offset is
|
|
* not changed after reading.
|
|
* 2) If the file offset argument is -1, preadv2() should succeed in
|
|
* reading the expected content of data and the current file offset
|
|
* is used and changed after reading.
|
|
*/
|
|
|
|
#define _GNU_SOURCE
|
|
#include <string.h>
|
|
#include <sys/uio.h>
|
|
|
|
#include "tst_test.h"
|
|
#include "lapi/preadv2.h"
|
|
|
|
#define CHUNK 64
|
|
|
|
static int fd;
|
|
static char buf[CHUNK];
|
|
|
|
static struct iovec rd_iovec[] = {
|
|
{buf, CHUNK},
|
|
{NULL, 0},
|
|
};
|
|
|
|
static struct tcase {
|
|
off_t seek_off;
|
|
int count;
|
|
off_t read_off;
|
|
ssize_t size;
|
|
char content;
|
|
off_t exp_off;
|
|
} tcases[] = {
|
|
{0, 1, 0, CHUNK, 'a', 0},
|
|
{CHUNK, 2, 0, CHUNK, 'a', CHUNK},
|
|
{0, 1, CHUNK*3 / 2, CHUNK / 2, 'b', 0},
|
|
{0, 1, -1, CHUNK, 'a', CHUNK},
|
|
{0, 2, -1, CHUNK, 'a', CHUNK},
|
|
{CHUNK, 1, -1, CHUNK, 'b', CHUNK * 2},
|
|
};
|
|
|
|
static void verify_preadv2(unsigned int n)
|
|
{
|
|
int i;
|
|
char *vec;
|
|
struct tcase *tc = &tcases[n];
|
|
|
|
vec = rd_iovec[0].iov_base;
|
|
memset(vec, 0x00, CHUNK);
|
|
|
|
SAFE_LSEEK(fd, tc->seek_off, SEEK_SET);
|
|
|
|
TEST(preadv2(fd, rd_iovec, tc->count, tc->read_off, 0));
|
|
if (TST_RET < 0) {
|
|
tst_res(TFAIL | TTERRNO, "preadv2() failed");
|
|
return;
|
|
}
|
|
|
|
if (TST_RET != tc->size) {
|
|
tst_res(TFAIL, "preadv2() read %li bytes, expected %zi",
|
|
TST_RET, tc->size);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < tc->size; i++) {
|
|
if (vec[i] != tc->content)
|
|
break;
|
|
}
|
|
|
|
if (i < tc->size) {
|
|
tst_res(TFAIL, "Buffer wrong at %i have %02x expected %02x",
|
|
i, vec[i], tc->content);
|
|
return;
|
|
}
|
|
|
|
if (SAFE_LSEEK(fd, 0, SEEK_CUR) != tc->exp_off) {
|
|
tst_res(TFAIL, "preadv2() has changed file offset");
|
|
return;
|
|
}
|
|
|
|
tst_res(TPASS, "preadv2() read %zi bytes with content '%c' expectedly",
|
|
tc->size, tc->content);
|
|
}
|
|
|
|
static void setup(void)
|
|
{
|
|
char buf[CHUNK];
|
|
|
|
fd = SAFE_OPEN("file", O_RDWR | O_CREAT, 0644);
|
|
|
|
memset(buf, 'a', sizeof(buf));
|
|
SAFE_WRITE(1, fd, buf, sizeof(buf));
|
|
|
|
memset(buf, 'b', sizeof(buf));
|
|
SAFE_WRITE(1, fd, buf, sizeof(buf));
|
|
}
|
|
|
|
static void cleanup(void)
|
|
{
|
|
if (fd > 0)
|
|
SAFE_CLOSE(fd);
|
|
}
|
|
|
|
static struct tst_test test = {
|
|
.tcnt = ARRAY_SIZE(tcases),
|
|
.setup = setup,
|
|
.cleanup = cleanup,
|
|
.test = verify_preadv2,
|
|
.needs_tmpdir = 1,
|
|
};
|