115 lines
2.1 KiB
C
115 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2015 Fujitsu Ltd.
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* Author: Xiao Yang <yangx.jy@cn.fujitsu.com>
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*/
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/*
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* Test Name: preadv01
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*
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* Test Description:
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* Testcase to check the basic functionality of the preadv(2).
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* Preadv(2) should succeed to read the expected content of data
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* and after reading the file, the file offset is not changed.
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*/
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#define _GNU_SOURCE
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#include <string.h>
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#include <sys/uio.h>
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#include "tst_test.h"
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#include "preadv.h"
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#define CHUNK 64
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static int fd;
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static struct iovec *rd_iovec;
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static struct tcase {
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int count;
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off_t offset;
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ssize_t size;
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char content;
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} tcases[] = {
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{1, 0, CHUNK, 'a'},
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{2, 0, CHUNK, 'a'},
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{1, CHUNK*3/2, CHUNK/2, 'b'}
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};
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void verify_preadv(unsigned int n)
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{
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int i;
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char *vec;
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struct tcase *tc = &tcases[n];
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vec = rd_iovec[0].iov_base;
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memset(vec, 0x00, CHUNK);
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SAFE_LSEEK(fd, 0, SEEK_SET);
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TEST(preadv(fd, rd_iovec, tc->count, tc->offset));
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if (TST_RET < 0) {
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tst_res(TFAIL | TTERRNO, "Preadv(2) failed");
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return;
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}
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if (TST_RET != tc->size) {
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tst_res(TFAIL, "Preadv(2) read %li bytes, expected %zi",
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TST_RET, tc->size);
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return;
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}
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for (i = 0; i < tc->size; i++) {
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if (vec[i] != tc->content)
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break;
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}
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if (i < tc->size) {
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tst_res(TFAIL, "Buffer wrong at %i have %02x expected %02x",
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i, vec[i], tc->content);
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return;
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}
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if (SAFE_LSEEK(fd, 0, SEEK_CUR) != 0) {
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tst_res(TFAIL, "Preadv(2) has changed file offset");
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return;
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}
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tst_res(TPASS, "Preadv(2) read %zi bytes successfully "
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"with content '%c' expectedly", tc->size, tc->content);
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}
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void setup(void)
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{
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char buf[CHUNK];
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fd = SAFE_OPEN("file", O_RDWR | O_CREAT, 0644);
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memset(buf, 'a', sizeof(buf));
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SAFE_WRITE(1, fd, buf, sizeof(buf));
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memset(buf, 'b', sizeof(buf));
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SAFE_WRITE(1, fd, buf, sizeof(buf));
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}
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void cleanup(void)
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{
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if (fd > 0)
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SAFE_CLOSE(fd);
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}
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static struct tst_test test = {
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.tcnt = ARRAY_SIZE(tcases),
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.setup = setup,
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.cleanup = cleanup,
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.test = verify_preadv,
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.min_kver = "2.6.30",
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.needs_tmpdir = 1,
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.bufs = (struct tst_buffers []) {
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{&rd_iovec, .iov_sizes = (int[]){CHUNK, 0, -1}},
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{},
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}
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};
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