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include/boost/spirit/iterator/impl/file_iterator.ipp  view on Meta::CPAN

                       // O_NOCTTY inhibits this.
#endif
            O_RDONLY);

        if (fd == -1)
            return;

        // call fstat to find get information about the file just
        // opened (size and file type)
        struct stat stat_buf;
        if ((fstat(fd, &stat_buf) != 0) || !S_ISREG(stat_buf.st_mode))
        {   // if fstat returns an error or if the file isn't a
            // regular file we give up.
            close(fd);
            return;
        }

        // perform the actual mapping
        void *p = mmap(0, stat_buf.st_size, PROT_READ, MAP_SHARED, fd, 0);
        // it is safe to close() here. POSIX requires that the OS keeps a
        // second handle to the file while the file is mmapped.