From afd375a7f86730dd865aebac257f40c58fc690df Mon Sep 17 00:00:00 2001 From: Robin Mueller Date: Sun, 22 Aug 2021 20:24:50 +0200 Subject: [PATCH] minor fix for canonical read handling --- hal/src/fsfw_hal/linux/uart/UartComIF.cpp | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/hal/src/fsfw_hal/linux/uart/UartComIF.cpp b/hal/src/fsfw_hal/linux/uart/UartComIF.cpp index 29a79205..99f5f8df 100644 --- a/hal/src/fsfw_hal/linux/uart/UartComIF.cpp +++ b/hal/src/fsfw_hal/linux/uart/UartComIF.cpp @@ -1,6 +1,7 @@ -#include "fsfw_hal/linux/uart/UartComIF.h" +#include "UartComIF.h" #include "OBSWConfig.h" +#include "fsfw_hal/linux/utility.h" #include "fsfw/serviceinterface/ServiceInterface.h" #include @@ -353,12 +354,13 @@ ReturnValue_t UartComIF::handleCanonicalRead(UartCookie& uartCookie, UartDeviceM size_t maxReplySize = uartCookie.getMaxReplyLen(); int fd = iter->second.fileDescriptor; auto bufferPtr = iter->second.replyBuffer.data(); + iter->second.replyLen = 0; do { size_t allowedReadSize = 0; if(currentBytesRead >= maxReplySize) { // Overflow risk. Emit warning, trigger event and break. If this happens, // the reception buffer is not large enough or data is not polled often enough. -#if OBSW_VERBOSE_LEVEL >= 1 +#if FSFW_VERBOSE_LEVEL >= 1 #if FSFW_CPP_OSTREAM_ENABLED == 1 sif::warning << "UartComIF::requestReceiveMessage: Next read would cause overflow!" << std::endl; @@ -376,7 +378,20 @@ ReturnValue_t UartComIF::handleCanonicalRead(UartCookie& uartCookie, UartDeviceM bytesRead = read(fd, bufferPtr, allowedReadSize); if (bytesRead < 0) { - return RETURN_FAILED; + // EAGAIN: No data available in non-blocking mode + if(errno != EAGAIN) { +#if FSFW_VERBOSE_LEVEL >= 1 +#if FSFW_CPP_OSTREAM_ENABLED == 1 + sif::warning << "UartComIF::handleCanonicalRead: read failed with code" << + errno << ": " << strerror(errno) << std::endl; +#else + sif::printWarning("UartComIF::handleCanonicalRead: read failed with code %d: %s\n", + errno, strerror(errno)); +#endif +#endif + return RETURN_FAILED; + } + } else if(bytesRead > 0) { iter->second.replyLen += bytesRead;