From 719a93482d5ed11dda54699285418918c3f85750 Mon Sep 17 00:00:00 2001
From: "Jan (janneke) Nieuwenhuizen" <janneke@gnu.org>
Date: Wed, 26 Oct 2022 15:33:12 +0200
Subject: [PATCH] DRAFT lib: Add sysconf stub.

* lib/stub/sysconf.c: New file.
* include/unistd.h (sysconf): Add prototype.
---
 build-aux/configure-lib.sh |  1 +
 include/unistd.h           |  3 ++-
 lib/stub/sysconf.c         | 32 ++++++++++++++++++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)
 create mode 100644 lib/stub/sysconf.c

diff --git a/build-aux/configure-lib.sh b/build-aux/configure-lib.sh
index df39f3ae..8f7b8cb1 100644
--- a/build-aux/configure-lib.sh
+++ b/build-aux/configure-lib.sh
@@ -399,6 +399,7 @@ lib/stub/sin.c
 lib/stub/sqrt.c
 lib/stub/strftime.c
 lib/stub/sys_siglist.c
+lib/stub/sysconf.c
 lib/stub/system.c
 lib/stub/times.c
 lib/stub/ttyname.c
diff --git a/include/unistd.h b/include/unistd.h
index 86353729..2b1ac6cf 100644
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -1,6 +1,6 @@
 /* -*-comment-start: "//";comment-end:""-*-
  * GNU Mes --- Maxwell Equations of Software
- * Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ * Copyright © 2017,2018,2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
  *
  * This file is part of GNU Mes.
  *
@@ -90,6 +90,7 @@ char *sbrk (ptrdiff_t delta);
 void *sbrk (intptr_t delta);
 #endif
 int symlink (char const *old_name, char const *new_name);
+long sysconf (int name);
 int unlink (char const *file_name);
 ssize_t write (int filedes, void const *buffer, size_t size);
 
diff --git a/lib/stub/sysconf.c b/lib/stub/sysconf.c
new file mode 100644
index 00000000..8e87b379
--- /dev/null
+++ b/lib/stub/sysconf.c
@@ -0,0 +1,32 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2022 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <mes/lib.h>
+#include <unistd.h>
+
+long
+sysconf (int name)
+{
+  static int stub = 0;
+  if (__mes_debug () && !stub)
+    eputs ("sysconf stub\n");
+  stub = 1;
+  return -1;
+}