84 lines
1.7 KiB
C
84 lines
1.7 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) International Business Machines Corp., 2002
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* Ported from SPIE, section2/iosuite/dup6.c, by Airong Zhang
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*/
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/*\
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* [Description]
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*
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* Negative test for dup2() with max open file descriptors.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include "tst_test.h"
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#include "tst_safe_macros.h"
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static int *fildes;
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static int min;
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static char pfilname[40];
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static void setup(void)
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{
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min = getdtablesize(); /* get number of files allowed open */
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fildes = SAFE_MALLOC((min + 10) * sizeof(int));
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memset(fildes, -1, (min + 10) * sizeof(int));
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sprintf(pfilname, "./dup205.%d\n", getpid());
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}
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static void cleanup(void)
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{
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if (fildes != NULL)
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free(fildes);
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}
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static void run(void)
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{
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int ifile = -1, rc = 0;
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fildes[0] = SAFE_CREAT(pfilname, 0666);
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fildes[fildes[0]] = fildes[0];
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for (ifile = fildes[0] + 1; ifile < min + 10; ifile++) {
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TEST(dup2(fildes[ifile - 1], ifile));
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fildes[ifile] = TST_RET;
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if (fildes[ifile] == -1)
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break;
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if (fildes[ifile] != ifile)
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tst_brk(TFAIL,
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"got wrong descriptor number back (%d != %d)",
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fildes[ifile], ifile);
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}
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if (ifile < min) {
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tst_res(TFAIL, "Not enough files duped");
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rc++;
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} else if (ifile > min) {
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tst_res(TFAIL, "Too many files duped");
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rc++;
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}
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if (TST_ERR != EBADF && TST_ERR != EMFILE && TST_ERR != EINVAL) {
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tst_res(TFAIL, "bad errno on dup2 failure");
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rc++;
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}
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if (rc)
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tst_res(TFAIL, "Test failed");
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else
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tst_res(TPASS, "Test passed");
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SAFE_UNLINK(pfilname);
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for (ifile = fildes[0]; ifile < min + 10; ifile++) {
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if (fildes[ifile] > 0)
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SAFE_CLOSE(fildes[ifile]);
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}
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}
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static struct tst_test test = {
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.needs_tmpdir = 1,
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.test_all = run,
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.setup = setup,
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.cleanup = cleanup,
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};
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