void init_cgroups()

in init/init.c [220:257]

• 37 lines of code
• 12 McCabe index (conditional complexity)

void init_cgroups() {
    const char *fpath = "/proc/cgroups";
    FILE *f = fopen(fpath, "r");
    if (f == NULL) {
        die2("fopen", fpath);
    }
    // Skip the first line.
    for (;;) {
        int c = fgetc(f);
        if (c == EOF || c == '\n') {
            break;
        }
    }
    for (;;) {
        static const char base_path[] = "/sys/fs/cgroup/";
        char path[sizeof(base_path) - 1 + 65];
        char* name = path + sizeof(base_path) - 1;
        int hier, groups, enabled;
        int r = fscanf(f, "%64s %d %d %d\n", name, &hier, &groups, &enabled);
        if (r == EOF) {
            break;
        }
        if (r != 4) {
            errno = errno ? : EINVAL;
            die2("fscanf", fpath);
        }
        if (enabled) {
            memcpy(path, base_path, sizeof(base_path) - 1);
            if (mkdir(path, 0755) < 0) {
                die2("mkdir", path);
            }
            if (mount(name, path, "cgroup", MS_NODEV | MS_NOSUID | MS_NOEXEC, name) < 0) {
                die2("mount", path);
            }
        }
    }
    fclose(f);
}