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Add modbus_get_errno function for DLL #820

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Add modbus_get_errno function for DLL #820

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e3e22dc
Update modbus.h
titania7777 Aug 25, 2025
21c3e00
Update modbus.c
titania7777 Aug 25, 2025
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5 changes: 5 additions & 0 deletions src/modbus.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1915,6 +1915,11 @@ int modbus_get_header_length(modbus_t *ctx)
return ctx->backend->header_length;
}

int modbus_get_errno()
{
return errno;
}

int modbus_enable_quirks(modbus_t *ctx, unsigned int quirks_mask)
{
if (ctx == NULL) {
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2 changes: 2 additions & 0 deletions src/modbus.h
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Expand Up @@ -211,6 +211,8 @@ modbus_set_indication_timeout(modbus_t *ctx, uint32_t to_sec, uint32_t to_usec);

MODBUS_API int modbus_get_header_length(modbus_t *ctx);

MODBUS_API int modbus_get_errno();

MODBUS_API int modbus_connect(modbus_t *ctx);
MODBUS_API void modbus_close(modbus_t *ctx);

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