[Bug libc/16274] shm_open changes break webkitgtk (at least)

["kevin at scrye dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16274

--- Comment #1 from Kevin Fenzi <kevin at scrye dot com> ---
Fyi, the code in webkitgtk is: 

    CString tempName;

    int fileDescriptor = -1;
    for (int tries = 0; fileDescriptor == -1 && tries < 10; ++tries) {
        String name = String("WK2SharedMemory.") +
String::number(static_cast<unsigned>(WTF::randomNumber() *
(std::numeric_limits<unsigned>::max() + 1.0)));
        tempName = name.utf8();

        do {
            fileDescriptor = shm_open(tempName.data(), O_CREAT | O_CLOEXEC |
O_RDWR, S_IRUSR | S_IWUSR);
        } while (fileDescriptor == -1 && errno == EINTR);
    }
    if (fileDescriptor == -1) {
        WTFLogAlways("Failed to create shared memory file %s",
tempName.data());
        return 0;
    }

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