104 lines
2.1 KiB
C
104 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2001
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* Copyright (c) 2019 FUJITSU LIMITED. All rights reserved.
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* Author: Wayne Boyer
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*/
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/*
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* Test Description:
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* Verify that, ftruncate() succeeds to truncate a file to a certain length,
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* if the file previously is smaller than the truncated size, ftruncate()
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* shall increase the size of the file.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include "tst_test.h"
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#define TESTFILE "testfile"
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#define TRUNC_LEN1 256
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#define TRUNC_LEN2 512
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#define FILE_SIZE 1024
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static int fd;
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static void check_and_report(off_t offset, char data, off_t trunc_len)
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{
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int i, file_length;
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char buf[FILE_SIZE];
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struct stat stat_buf;
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memset(buf, '*', sizeof(buf));
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SAFE_FSTAT(fd, &stat_buf);
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file_length = stat_buf.st_size;
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if (file_length != trunc_len) {
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tst_res(TFAIL, "ftruncate() got incorrected size: %d",
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file_length);
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return;
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}
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SAFE_LSEEK(fd, offset, SEEK_SET);
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SAFE_READ(0, fd, buf, sizeof(buf));
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for (i = 0; i < TRUNC_LEN1; i++) {
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if (buf[i] != data) {
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tst_res(TFAIL,
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"ftruncate() got incorrect data %i, expected %i",
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buf[i], data);
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return;
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}
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}
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tst_res(TPASS, "ftruncate() succeeded");
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}
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static void verify_ftruncate(void)
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{
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tst_res(TINFO, "Truncated length smaller than file size");
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TEST(ftruncate(fd, TRUNC_LEN1));
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if (TST_RET == -1) {
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tst_res(TFAIL | TTERRNO, "ftruncate() failed");
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return;
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}
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check_and_report(0, 'a', TRUNC_LEN1);
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tst_res(TINFO, "Truncated length exceeds file size");
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TEST(ftruncate(fd, TRUNC_LEN2));
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if (TST_RET == -1) {
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tst_res(TFAIL | TTERRNO, "ftruncate() failed");
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return;
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}
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check_and_report(TRUNC_LEN1, 0, TRUNC_LEN2);
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}
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static void setup(void)
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{
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if (tst_fill_file(TESTFILE, 'a', FILE_SIZE, 1))
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tst_brk(TBROK, "Failed to create test file");
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fd = SAFE_OPEN(TESTFILE, O_RDWR);
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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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.test_all = verify_ftruncate,
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.setup = setup,
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.cleanup = cleanup,
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.needs_tmpdir = 1,
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};
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