81 lines
2.1 KiB
C
81 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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* 07/2001 Ported by Wayne Boyer
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*/
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/*
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* Verify that lseek64() call succeeds to set the file pointer position to an
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* offset larger than file size limit (RLIMIT_FSIZE). Also, verify that any
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* attempt to write to this location fails.
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*/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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#include "tst_test.h"
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#define TEMP_FILE "tmp_file"
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#define FILE_MODE 0644
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static char write_buff[BUFSIZ];
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static int fildes;
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static void verify_llseek(void)
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{
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TEST(lseek64(fildes, (loff_t) (80 * BUFSIZ), SEEK_SET));
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if (TST_RET == (80 * BUFSIZ))
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tst_res(TPASS, "lseek64() can set file pointer position larger than file size limit");
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else
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tst_res(TFAIL, "lseek64() returned wrong value %ld when write past file size", TST_RET);
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if (write(fildes, write_buff, BUFSIZ) == -1)
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tst_res(TPASS,"write failed after file size limit");
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else
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tst_brk(TFAIL, "write successful after file size limit");
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TEST(lseek64(fildes, (loff_t) BUFSIZ, SEEK_SET));
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if (TST_RET == BUFSIZ)
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tst_res(TPASS,"lseek64() can set file pointer position under filer size limit");
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else
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tst_brk(TFAIL,"lseek64() returns wrong value %ld when write under file size", TST_RET);
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if (write(fildes, write_buff, BUFSIZ) != -1)
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tst_res(TPASS, "write succcessfully under file size limit");
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else
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tst_brk(TFAIL, "write failed under file size limit");
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if (write(fildes, write_buff, BUFSIZ) == -1)
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tst_res(TPASS, "write failed after file size limit");
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else
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tst_brk(TFAIL, "write successfully after file size limit");
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}
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static void setup(void)
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{
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struct sigaction act;
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struct rlimit rlp;
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act.sa_handler = SIG_IGN;
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act.sa_flags = 0;
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sigemptyset(&act.sa_mask);
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SAFE_SIGACTION(SIGXFSZ, &act, NULL);
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rlp.rlim_cur = rlp.rlim_max = 2 * BUFSIZ;
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SAFE_SETRLIMIT(RLIMIT_FSIZE, &rlp);
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fildes = SAFE_OPEN(TEMP_FILE, O_RDWR | O_CREAT, FILE_MODE);
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SAFE_WRITE(1, fildes, write_buff, BUFSIZ);
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}
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static struct tst_test test = {
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.setup = setup,
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.needs_tmpdir = 1,
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.test_all = verify_llseek,
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};
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