From eec4167ab960b5e1989a4845844c05c79981c71b Mon Sep 17 00:00:00 2001
From: "Rob Swindell (on Debian Linux)" <rob@synchro.net>
Date: Mon, 16 Oct 2023 17:51:33 -0700
Subject: [PATCH] Implement write-retry in modem_send()
In attempt to address the "Error 11" (EAGAIN) error theat Nelgin sees when
configuring some longer modem init strings on Linux.
This is just a single retry (after a yield) after any modem command char
send failure (for any reason), including the terminating carriage-return.
See issue #662 to details.
---
src/sexpots/sexpots.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/src/sexpots/sexpots.c b/src/sexpots/sexpots.c
index d22a37d589..e9af3a0244 100644
--- a/src/sexpots/sexpots.c
+++ b/src/sexpots/sexpots.c
@@ -613,12 +613,19 @@ BOOL modem_send(COM_HANDLE com_handle, const char* str)
if(ch!='^' && ch>='@') /* ^^ to send an '^' char to the modem */
ch-='@';
}
- if(!comWriteByte(com_handle,ch))
- return FALSE;
+ if(!comWriteByte(com_handle,ch)) {
+ YIELD();
+ if(!comWriteByte(com_handle,ch))
+ return FALSE;
+ }
}
SLEEP(100);
comPurgeInput(com_handle);
- return comWriteByte(com_handle, '\r');
+ if(!comWriteByte(com_handle, '\r')) {
+ YIELD();
+ return comWriteByte(com_handle, '\r');
+ }
+ return TRUE;
}
/****************************************************************************/
--
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