From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <pengyu.ut@gmail.com>
Received: from mail-io1-xd2a.google.com (mail-io1-xd2a.google.com
 [IPv6:2607:f8b0:4864:20::d2a])
 by sourceware.org (Postfix) with ESMTPS id AF8D93858028
 for <libc-help@sourceware.org>; Mon, 12 Apr 2021 17:27:31 +0000 (GMT)
DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org AF8D93858028
Received: by mail-io1-xd2a.google.com with SMTP id b10so14250706iot.4
 for <libc-help@sourceware.org>; Mon, 12 Apr 2021 10:27:31 -0700 (PDT)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20161025;
 h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
 bh=dQ48/H3FOCSveSzlrKRnY8CWTkYzPPIYgxjSbnC7VYE=;
 b=JBt5RAfl+i5ZLPfkBXKAsxr+PbSkATizN1a/GwU8yWUnwAqECW20pLt8lzZSY/HO7V
 Hal0PSPRZZaKnRLwEVDGq5QnQCamvxwTLTFlpc2wtARqC0p7OnddEKEZKwi3ZrSIQG52
 NgXJ9HKBkAyvulhG4gUU91utNTgbehysbwN+lUj/qGDV9OnoEgqVgPDcErFkEH978rdB
 0+mTKzUmk4yHCqvpM9aCn7QfT+P7smyP/nDfoNcDUmbMEM9r1PnmotO/1fETSgMxafLo
 mbv9CaMZd+ejvQDH8cwUpkHNKp4Kbkqja1yBq+sh778BW6bHmpsezTpAjFIIYDPSw3bZ
 00SA==
X-Gm-Message-State: AOAM531FM0Q4ZkJ9pG6qUXkxrL3YASbvKWeLo8QpaR9/MAt15qjC3sNQ
 9akQgRGOgKr/AqvGvRHk/4Y2O9/bxWWCEpMvQOko8Wq/+Is=
X-Google-Smtp-Source: ABdhPJwXwY9EEQP0HH9UJnRJBb95y31Y9YcLdh+jYbJe9GnkL6jvaXz0VzRYNjaeoFGL5P8WT7ql5YQjAzERMhkTSbQ=
X-Received: by 2002:a02:294e:: with SMTP id p75mr29462899jap.34.1618248451056; 
 Mon, 12 Apr 2021 10:27:31 -0700 (PDT)
MIME-Version: 1.0
From: Peng Yu <pengyu.ut@gmail.com>
Date: Mon, 12 Apr 2021 12:27:19 -0500
Message-ID: <CABrM6wkcqnEuASbuC3SoQQyFtv-fqBS=+-vYs8pgnuJyUkyKuQ@mail.gmail.com>
Subject: Where are SHMMIN and SHMMAX of shmget(2) defined?
To: libc-help <libc-help@sourceware.org>
Content-Type: text/plain; charset="UTF-8"
X-Spam-Status: No, score=-0.4 required=5.0 tests=BAYES_00, DKIM_SIGNED,
 DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM,
 PDS_TONAME_EQ_TOLOCAL_SHORT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS,
 TXREP autolearn=no autolearn_force=no version=3.4.2
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on
 server2.sourceware.org
X-BeenThere: libc-help@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Libc-help mailing list <libc-help.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/libc-help>,
 <mailto:libc-help-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/libc-help/>
List-Help: <mailto:libc-help-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/libc-help>,
 <mailto:libc-help-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Mon, 12 Apr 2021 17:27:32 -0000

Hi,

shmget(2) mentions SHMMIN and SHMMAX.

But I don't see where they are defined and what their values are. Does
anybody know where they are defined?

gcc -E -dD - <<< '#include <sys/shm.h>' | grep 'SHMMAX\|SHMMIN'

-- 
Regards,
Peng