From ddf14425d65b2726e02ea9c073b57ee21c81b241 Mon Sep 17 00:00:00 2001
From: Eric Claeys <83164203+EricClaeys@users.noreply.github.com>
Date: Wed, 20 Nov 2024 03:39:33 -0600
Subject: [PATCH] Update allsky_common.cpp: Ignore empty --cmd argument

ZWO cameras don't use "-cmd command" so pass "" for the command.  Ignore that so checks for "if (cmdToUse == NULL)" work.
---
 src/allsky_common.cpp | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/allsky_common.cpp b/src/allsky_common.cpp
index d99716f82..a252560f6 100644
--- a/src/allsky_common.cpp
+++ b/src/allsky_common.cpp
@@ -1594,13 +1594,20 @@ bool getCommandLineArguments(config *cg, int argc, char *argv[], bool readConfig
 		else if (strcmp(a, "cmd") == 0)
 		{
 			cg->cmdToUse = argv[++i];
-			if (strcmp(cg->cmdToUse, "raspistill") == 0)
+			if (cg->cmdToUse[0] == '\0')
 			{
-				cg->isLibcamera = false;
+				cg->cmdToUse = NULL;		// usually with ZWO, which doesn't use this
 			}
 			else
 			{
-				cg->isLibcamera = true;
+				if (strcmp(cg->cmdToUse, "raspistill") == 0)
+				{
+					cg->isLibcamera = false;
+				}
+				else
+				{
+					cg->isLibcamera = true;
+				}
 			}
 		}
 		else if (strcmp(a, "tty") == 0)	// overrides what was automatically determined