92 lines
2.1 KiB
C
92 lines
2.1 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) 2018 Xiao Yang <yangx.jy@cn.fujitsu.com>
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* Copyright (c) 2019 SUSE. All Rights Reserved.
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*/
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/*
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* DESCRIPTION:
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* Testcase for testing the basic functionality of sysctl(2) system call.
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* This testcase attempts to read the kernel parameters by using
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* sysctl({CTL_KERN, KERN_* }, ...) and compares it with the known values.
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <linux/version.h>
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#include <sys/utsname.h>
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#include <linux/unistd.h>
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#include <linux/sysctl.h>
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#include "tst_test.h"
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#include "lapi/syscalls.h"
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static struct utsname buf;
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static struct tcase {
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char *desc;
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int name[2];
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char *cmp_str;
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} tcases[] = {
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{"KERN_OSTYPE", {CTL_KERN, KERN_OSTYPE}, buf.sysname},
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{"KERN_OSRELEASE", {CTL_KERN, KERN_OSRELEASE}, buf.release},
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{"KERN_VERSION", {CTL_KERN, KERN_VERSION}, buf.version},
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};
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static void verify_sysctl(unsigned int n)
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{
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char osname[BUFSIZ];
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size_t length = BUFSIZ;
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struct tcase *tc = &tcases[n];
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memset(osname, 0, BUFSIZ);
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struct __sysctl_args args = {
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.name = tc->name,
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.nlen = ARRAY_SIZE(tc->name),
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.oldval = osname,
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.oldlenp = &length,
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};
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TEST(tst_syscall(__NR__sysctl, &args));
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if (TST_RET != 0) {
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tst_res(TFAIL | TTERRNO, "sysctl() failed unexpectedly");
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return;
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}
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if (strcmp(osname, tc->cmp_str)) {
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tst_res(TFAIL, "Strings don't match %s : %s",
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osname, tc->cmp_str);
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} else {
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tst_res(TPASS, "Test for %s is correct", tc->desc);
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}
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}
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static void setup(void)
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{
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/* get kernel name and information */
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if (uname(&buf) == -1)
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tst_brk(TBROK | TERRNO, "uname() failed");
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/* revert uname change in case of kGraft/livepatch */
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char *klp_tag;
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char *right_brace;
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klp_tag = strstr(buf.version, "/kGraft-");
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if (!klp_tag)
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klp_tag = strstr(buf.version, "/lp-");
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if (klp_tag) {
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right_brace = strchr(klp_tag, ')');
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if (right_brace)
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memmove(klp_tag, right_brace, strlen(right_brace)+1);
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}
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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_sysctl,
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};
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