From fa080de7afc95aa1c19a6e6fc0e0708ced2eadc4 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 8 Jul 2015 20:46:52 -0400 Subject: Initial commit --- sys/etc/envgetd.x | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 sys/etc/envgetd.x (limited to 'sys/etc/envgetd.x') 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 +include + +# 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 -- cgit