1 files changed, 27 insertions, 0 deletions
diff --git a/sys/etc/envgetd.x b/sys/etc/envgetd.x
new file mode 100644
index 00000000..749c3aef
--- /dev/null
+++ b/sys/etc/envgetd.x
@@ -0,0 +1,27 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include	<syserr.h>
+include	<mach.h>
+
+# ENVGETD -- Fetch an environment variable and try to interpret its value
+# as a double.  Abort if variable is not found or cannot be converted to
+# a number.
+
+double procedure envgetd (varname)
+
+char	varname[ARB]
+
+int	ip
+double	dval
+char	val[MAX_DIGITS]
+int	ctod(), envfind()
+errchk	envfind, syserrs
+
+begin
+	ip = 1
+	if (envfind (varname, val, MAX_DIGITS) > 0)
+	    if (ctod (val, ip, dval) > 0)
+		return (dval)
+
+	call syserrs (SYS_ENVNNUM, varname)
+end