import winsup-2000-02-17 snapshot

1 files changed, 62 insertions, 0 deletions

diff --git a/winsup/cygwin/sysconf.cc b/winsup/cygwin/sysconf.cc
new file mode 100644
index 000000000..6dcb08afc
--- /dev/null
+++ b/winsup/cygwin/sysconf.cc
@@ -0,0 +1,62 @@
+/* sysconf.cc
+
+   Copyright 1996, 1997, 1998 Cygnus Solutions.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+#include <limits.h>
+#include "winsup.h"
+
+/* sysconf: POSIX 4.8.1.1 */
+/* Allows a portable app to determine quantities of resources or
+   presence of an option at execution time. */
+long int
+sysconf (int in)
+{
+  switch (in)
+    {
+      case _SC_ARG_MAX:
+	/* FIXME: what's the right value?  _POSIX_ARG_MAX is only 4K */
+	return 1048576;
+      case _SC_OPEN_MAX:
+	/* FIXME: this returns the current limit which can increase
+	   if and when hinfo::find_unused_handle is called.  Perhaps
+	   we should return NOFILE or OPEN_MAX instead? */
+	return dtable.size;
+      case _SC_PAGESIZE:
+	{
+	  SYSTEM_INFO b;
+	  GetSystemInfo (&b);
+	  return b.dwPageSize;
+	}
+      case _SC_CLK_TCK:
+	return CLOCKS_PER_SEC;
+      case _SC_JOB_CONTROL:
+	return _POSIX_JOB_CONTROL;
+      case _SC_CHILD_MAX:
+	return CHILD_MAX;
+      case _SC_NGROUPS_MAX:
+	return NGROUPS_MAX;
+      case _SC_SAVED_IDS:
+	return _POSIX_SAVED_IDS;
+      case _SC_VERSION:
+	return _POSIX_VERSION;
+#if 0	/* FIXME -- unimplemented */
+      case _SC_TZNAME_MAX:
+	return _POSIX_TZNAME_MAX;
+      case _SC_STREAM_MAX:
+	return _POSIX_STREAM_MAX;
+#endif
+    }
+
+  /* Invalid input or unimplemented sysconf name */
+  set_errno (EINVAL);
+  return -1;
+}