76 lines
1.7 KiB
C
76 lines
1.7 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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* Copyright (c) 2017 Xiao Yang <yangx.jy@cn.fujitsu.com>
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*/
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/*
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* DESCRIPTION
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* 1) Test for EPERM when the super-user tries to increase RLIMIT_NOFILE
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* beyond the system limit.
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* 2) Test for EINVAL when rlim->rlim_cur is greater than rlim->rlim_max.
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*/
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#include <errno.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <linux/fs.h>
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#include "tst_test.h"
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#if !defined(NR_OPEN)
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// Taken from definition in /usr/include/linux/fs.h
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# define NR_OPEN (1024*1024)
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#endif
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#define NR_OPEN_PATH "/proc/sys/fs/nr_open"
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static struct rlimit rlim1, rlim2;
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static unsigned int nr_open = NR_OPEN;
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static struct tcase {
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struct rlimit *rlimt;
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int exp_err;
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} tcases[] = {
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{&rlim1, EPERM},
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{&rlim2, EINVAL}
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};
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static void verify_setrlimit(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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TEST(setrlimit(RLIMIT_NOFILE, tc->rlimt));
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if (TST_RET != -1) {
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tst_res(TFAIL, "call succeeded unexpectedly "
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"(nr_open=%u rlim_cur=%lu rlim_max=%lu)", nr_open,
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(unsigned long)(tc->rlimt->rlim_cur),
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(unsigned long)(tc->rlimt->rlim_max));
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return;
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}
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if (TST_ERR != tc->exp_err) {
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tst_res(TFAIL | TTERRNO, "setrlimit() should fail with %s, got",
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tst_strerrno(tc->exp_err));
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} else {
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tst_res(TPASS | TTERRNO, "setrlimit() failed as expected");
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}
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}
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static void setup(void)
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{
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if (!access(NR_OPEN_PATH, F_OK))
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SAFE_FILE_SCANF(NR_OPEN_PATH, "%u", &nr_open);
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SAFE_GETRLIMIT(RLIMIT_NOFILE, &rlim1);
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rlim2.rlim_max = rlim1.rlim_cur;
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rlim2.rlim_cur = rlim1.rlim_max + 1;
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rlim1.rlim_max = nr_open + 1;
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}
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static struct tst_test test = {
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.setup = setup,
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.tcnt = ARRAY_SIZE(tcases),
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.test = verify_setrlimit,
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.needs_root = 1
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};
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