66 lines
1.2 KiB
C
66 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Linux Test Project, 2021
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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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* [Description]
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*
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* Tests basic error handling of the fcntl syscall.
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*
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* - EMFILE when cmd is F_DUPFD and the per-process limit on the number of open
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* file descriptors has been reached.
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*/
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#include <fcntl.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "tst_test.h"
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static char fname[20] = "testfile";
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static int fd = -1, max_files;
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static void verify_fcntl(void)
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{
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pid_t pid;
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int i;
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pid = SAFE_FORK();
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if (pid == 0) {
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for (i = 0; i < max_files; i++) {
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fd = open(fname, O_CREAT | O_RDONLY, 0444);
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if (fd == -1)
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break;
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}
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TST_EXP_FAIL2(fcntl(1, F_DUPFD, 1), EMFILE,
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"fcntl(1, F_DUPFD, 1)");
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}
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tst_reap_children();
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}
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static void setup(void)
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{
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max_files = getdtablesize();
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}
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static void cleanup(void)
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{
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if (fd > -1)
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SAFE_CLOSE(fd);
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SAFE_UNLINK(fname);
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}
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static struct tst_test test = {
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.forks_child = 1,
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.needs_tmpdir = 1,
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.setup = setup,
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.cleanup = cleanup,
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.test_all = verify_fcntl,
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};
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