interprocess_util.cc

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// Copyright (C) 2013-2025 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
#include <config.h>
 
#include <util/ready_check.h>
 
#include <gtest/gtest.h>
 
#include <cstddef>
 
namespace isc {
namespace util {
namespace unittests {
 
unsigned char
parentReadState(int fd) {
    unsigned char result = 0xff;
 
    const int nfds = util::selectCheck(fd, 5);
    EXPECT_EQ(1, nfds);
 
    if (nfds == 1) {
        // Read status
        const ssize_t bytes_read = read(fd, &result, sizeof(result));
        EXPECT_EQ(static_cast<ssize_t>(sizeof(result)), bytes_read);
    }
 
    return (result);
}
 
}
}
}