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82 lines
1.6 KiB
82 lines
1.6 KiB
7 months ago
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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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* Ported to LTP: Wayne Boyer
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*/
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/*
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* Testcase to check that creat(2) system call returns EMFILE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <linux/limits.h>
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#include <unistd.h>
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#include "tst_test.h"
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static int *opened_fds, num_opened_fds;
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static void verify_creat(void)
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{
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TEST(creat("filename", 0666));
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if (TST_RET != -1) {
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tst_res(TFAIL, "call succeeded unexpectedly");
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SAFE_CLOSE(TST_RET);
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return;
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}
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if (TST_ERR == EMFILE)
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tst_res(TPASS, "creat() failed with EMFILE");
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else
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tst_res(TFAIL | TTERRNO, "Expected EMFILE");
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}
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static void setup(void)
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{
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int max_open;
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int fd;
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char fname[PATH_MAX];
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/* get the maximum number of files that we can open */
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max_open = getdtablesize();
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tst_res(TINFO, "getdtablesize() = %d", max_open);
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opened_fds = SAFE_MALLOC(max_open * sizeof(int));
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/* now open as many files as we can up to max_open */
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do {
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snprintf(fname, sizeof(fname), "creat05_%d", num_opened_fds);
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fd = SAFE_CREAT(fname, 0666);
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opened_fds[num_opened_fds++] = fd;
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} while (fd < max_open - 1);
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tst_res(TINFO, "Opened additional #%d fds", num_opened_fds);
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}
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static void cleanup(void)
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{
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int i;
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for (i = 0; i < num_opened_fds; i++) {
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if (close(opened_fds[i])) {
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tst_res(TWARN | TERRNO, "close(%i) failed",
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opened_fds[i]);
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}
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}
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free(opened_fds);
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}
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static struct tst_test test = {
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.test_all = verify_creat,
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.needs_tmpdir = 1,
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.setup = setup,
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.cleanup = cleanup,
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};
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