71 lines
1.3 KiB
C
71 lines
1.3 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., 2001
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* Copyright (c) 2022 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
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*/
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/*\
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* [Description]
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*
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* Verify that open(2) fails with EMFILE when per-process limit on the number
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* of open file descriptors has been reached.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "tst_test.h"
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#define FNAME "open04"
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static int fds_limit, first, i;
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static int *fds;
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static char fname[20];
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static void setup(void)
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{
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int fd;
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fds_limit = getdtablesize();
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first = SAFE_OPEN(FNAME, O_RDWR | O_CREAT, 0777);
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fds = SAFE_MALLOC(sizeof(int) * (fds_limit - first));
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fds[0] = first;
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for (i = first + 1; i < fds_limit; i++) {
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sprintf(fname, FNAME ".%d", i);
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fd = open(fname, O_RDWR | O_CREAT, 0777);
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if (fd == -1) {
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if (errno != EMFILE)
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tst_brk(TBROK, "Expected EMFILE but got %d", errno);
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fds_limit = i;
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break;
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}
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fds[i - first] = fd;
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}
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}
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static void run(void)
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{
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sprintf(fname, FNAME ".%d", fds_limit);
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TST_EXP_FAIL2(open(fname, O_RDWR | O_CREAT, 0777), EMFILE);
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}
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static void cleanup(void)
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{
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if (!first || !fds)
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return;
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for (i = first; i < fds_limit; i++)
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SAFE_CLOSE(fds[i - first]);
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if (fds)
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free(fds);
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}
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static struct tst_test test = {
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.test_all = run,
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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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