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From f067c4530fb385137a7458011b082690ac1c705e Mon Sep 17 00:00:00 2001
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From: Greg King <gregdk@users.sf.net>
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Date: Wed, 25 Dec 2019 14:53:32 -0500
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Subject: [PATCH 131/170] Made the program-chaining exec() handle the X16
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emulator's file-system.
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---
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libsrc/cx16/exec.c | 15 +++++++++------
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1 file changed, 9 insertions(+), 6 deletions(-)
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diff --git a/libsrc/cx16/exec.c b/libsrc/cx16/exec.c
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index 90af4e40..17a547e6 100644
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--- a/libsrc/cx16/exec.c
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+++ b/libsrc/cx16/exec.c
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@@ -1,7 +1,7 @@
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/*
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** Program-chaining function for Commodore platforms.
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**
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-** 2019-11-08, Greg King
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+** 2019-12-25, Greg King
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**
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** This function exploits the program-chaining feature in Commander X16 BASIC's ROM.
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**
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@@ -82,12 +82,15 @@ int __fastcall__ exec (const char* progname, const char* cmdline)
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}
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utoa (dv, basic.unit, 10);
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- /* Don't try to run a program that doesn't exist. */
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- fd = open (progname, O_RDONLY);
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- if (fd < 0) {
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- return _mappederrno (4); /* file not found */
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+ /* The emulator supports only loading and saving on its file-system. */
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+ if (dv != 1) {
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+ /* Don't try to run a program that doesn't exist. */
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+ fd = open (progname, O_RDONLY);
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+ if (fd < 0) {
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+ return _mappederrno (4); /* file not found */
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+ }
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+ close (fd);
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}
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- close (fd);
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n = 0;
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do {
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--
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2.26.0
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