120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2019 FUJITSU LIMITED. All rights reserved.
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* Author: Jinhui Huang <huangjh.jy@cn.fujitsu.com>
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*/
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/*
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* Description:
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* Testcase to check the basic functionality of the pwritev2(2).
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* 1) If the file offset argument is not -1, pwritev2() should succeed
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* in writing the expected content of data and the file offset is
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* not changed after writing.
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* 2) If the file offset argument is -1, pwritev2() should succeed in
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* writing the expected content of data and the current file offset
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* is used and changed after writing.
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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 "lapi/pwritev2.h"
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#include "tst_safe_prw.h"
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#define CHUNK 64
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static int fd;
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static char initbuf[CHUNK * 2];
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static char buf[CHUNK];
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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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off_t seek_off;
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int count;
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off_t write_off;
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ssize_t size;
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off_t exp_off;
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} tcases[] = {
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{0, 1, 0, CHUNK, 0},
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{CHUNK, 2, 0, CHUNK, CHUNK},
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{0, 1, CHUNK / 2, CHUNK, 0},
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{0, 1, -1, CHUNK, CHUNK},
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{0, 2, -1, CHUNK, CHUNK},
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{CHUNK, 1, -1, CHUNK, CHUNK * 2},
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};
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static void verify_pwritev2(unsigned int n)
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{
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int i;
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char preadbuf[CHUNK];
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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, tc->seek_off, SEEK_SET);
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TEST(pwritev2(fd, wr_iovec, tc->count, tc->write_off, 0));
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if (TST_RET < 0) {
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tst_res(TFAIL | TTERRNO, "pwritev2() 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, "pwritev2() 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) != tc->exp_off) {
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tst_res(TFAIL, "pwritev2() had changed file offset");
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return;
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}
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memset(preadbuf, 0, CHUNK);
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if (tc->write_off != -1)
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SAFE_PREAD(1, fd, preadbuf, tc->size, tc->write_off);
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else
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SAFE_PREAD(1, fd, preadbuf, tc->size, tc->seek_off);
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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 %c expected 'a'",
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i, preadbuf[i]);
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return;
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}
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tst_res(TPASS, "pwritev2() 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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memset(initbuf, 0, CHUNK * 2);
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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_pwritev2,
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.needs_tmpdir = 1,
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};
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