109 lines
2.0 KiB
C
109 lines
2.0 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: pwritev01
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*
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* Test Description:
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* Testcase to check the basic functionality of the pwritev(2).
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* pwritev(2) should succeed to write the expected content of data
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* and after writing 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 "pwritev.h"
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#include "tst_safe_prw.h"
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#define CHUNK 64
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static char buf[CHUNK];
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static char initbuf[CHUNK * 2];
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static char preadbuf[CHUNK];
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static int fd;
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static struct iovec wr_iovec[] = {
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{buf, CHUNK},
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{NULL, 0},
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};
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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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} tcases[] = {
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{1, 0, CHUNK},
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{2, 0, CHUNK},
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{1, CHUNK/2, CHUNK},
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};
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static void verify_pwritev(unsigned int n)
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{
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int i;
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struct tcase *tc = &tcases[n];
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SAFE_PWRITE(1, fd, initbuf, sizeof(initbuf), 0);
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SAFE_LSEEK(fd, 0, SEEK_SET);
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TEST(pwritev(fd, wr_iovec, tc->count, tc->offset));
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if (TST_RET < 0) {
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tst_res(TFAIL | TTERRNO, "pwritev() 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, "pwritev() wrote %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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if (SAFE_LSEEK(fd, 0, SEEK_CUR) != 0) {
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tst_res(TFAIL, "pwritev() had changed file offset");
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return;
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}
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SAFE_PREAD(1, fd, preadbuf, tc->size, tc->offset);
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for (i = 0; i < tc->size; i++) {
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if (preadbuf[i] != 0x61)
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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 61",
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i, preadbuf[i]);
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return;
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}
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tst_res(TPASS, "writev() wrote %zi bytes successfully "
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"with content 'a' expectedly ", tc->size);
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}
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static void setup(void)
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{
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memset(&buf, 0x61, CHUNK);
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fd = SAFE_OPEN("file", O_RDWR | O_CREAT, 0644);
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}
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static 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_pwritev,
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.min_kver = "2.6.30",
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.needs_tmpdir = 1,
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};
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