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/**
* Seccomp Library test program
*
* Copyright (c) 2012 Red Hat <pmoore@redhat.com>
* Author: Paul Moore <paul@paul-moore.com>
*/
/*
* This library is free software; you can redistribute it and/or modify it
* under the terms of version 2.1 of the GNU Lesser General Public License as
* published by the Free Software Foundation.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, see <http://www.gnu.org/licenses>.
*/
#include <errno.h>
#include <limits.h>
#include <unistd.h>
#include <seccomp.h>
#include "util.h"
int main(int argc, char *argv[])
{
int rc;
struct util_options opts;
scmp_filter_ctx ctx = NULL;
rc = util_getopt(argc, argv, &opts);
if (rc < 0)
goto out;
ctx = seccomp_init(SCMP_ACT_KILL);
if (ctx == NULL)
return ENOMEM;
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(openat), 0);
if (rc != 0)
goto out;
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(close), 0);
if (rc != 0)
goto out;
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(read), 3,
SCMP_A0(SCMP_CMP_EQ, STDIN_FILENO),
SCMP_A1(SCMP_CMP_NE, 0x0),
SCMP_A2(SCMP_CMP_LT, SSIZE_MAX));
if (rc != 0)
goto out;
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(write), 3,
SCMP_A0(SCMP_CMP_EQ, STDOUT_FILENO),
SCMP_A1(SCMP_CMP_NE, 0x0),
SCMP_A2(SCMP_CMP_LT, SSIZE_MAX));
if (rc != 0)
goto out;
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(write), 3,
SCMP_A0(SCMP_CMP_EQ, STDERR_FILENO),
SCMP_A1(SCMP_CMP_NE, 0x0),
SCMP_A2(SCMP_CMP_LT, SSIZE_MAX));
if (rc != 0)
goto out;
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(close), 0);
if (rc != 0)
goto out;
rc = seccomp_rule_add(ctx, SCMP_ACT_ALLOW, SCMP_SYS(rt_sigreturn), 0);
if (rc != 0)
goto out;
rc = util_filter_output(&opts, ctx);
if (rc)
goto out;
out:
seccomp_release(ctx);
return (rc < 0 ? -rc : rc);
}
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