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/*
* Embedded Linux library
* Copyright (C) 2023 Cruise LLC
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <ell/ell.h>
static void test_sysctl_get_set(const void *data)
{
FILE *f;
uint32_t n;
uint32_t expected;
int r;
/* Grab the setting via sysctl */
f = popen("sysctl -n net.core.somaxconn", "r");
assert(f);
assert(fscanf(f, "%u", &expected) == 1);
pclose(f);
/* Now check against what we get */
assert(l_sysctl_get_u32(&n, "/proc/sys/%s/%s/%s",
"net", "core", "somaxconn") == 0);
assert(n == expected);
/*
* Attempt to change the setting, if we get an -EPERM, then we're
* most likely not running as root, so succeed silently. Any other
* error is treated as a unit test failure
*/
r = l_sysctl_set_u32(5000, "/proc/sys/net/core/%s", "somaxconn");
if (r == -EACCES)
return;
assert(!r);
assert(!l_sysctl_get_u32(&n, "/proc/sys/net/core/somaxconn"));
assert(n == 5000);
/* Set it back to original */
assert(!l_sysctl_set_u32(expected, "/proc/sys/net/core/somaxconn"));
}
int main(int argc, char *argv[])
{
int ret;
l_test_init(&argc, &argv);
/*
* test is failing if /proc/sys/net/core/somaxconn does not exist
* this can happen when either net is not compiled, or running in
* a namespace where sysfs is not mounted
*/
ret = access("/proc/sys/net/core/somaxconn", F_OK);
if (!ret)
l_test_add("sysctl/get_set", test_sysctl_get_set, NULL);
return l_test_run();
}
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