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bundled/tools/src/tui_engine.c  view on Meta::CPAN

    int fd = -1;
    if (path[0] == '/') {
        fd = shm_open(path, O_RDWR, 0666);
    }
    if (fd < 0) {
        fd = open(path, O_RDWR, 0666);
    }
    if (fd < 0) return false;

    struct stat st;
    if (fstat(fd, &st) != 0 || st.st_size < (off_t)sizeof(histo_shm_ring_t)) {
        close(fd);
        return false;
    }

    size_t total_size = (size_t)st.st_size;
    void *ptr = mmap(NULL, total_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
    if (ptr == MAP_FAILED) {
        close(fd);
        return false;
    }