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