added more error handling
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7a85d035c0
commit
c979881804
4 changed files with 101 additions and 9 deletions
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@ -4,7 +4,7 @@ project(monad_native)
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
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#include gtest
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include_directories(../ext-src/gtest/fused-src impl)
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include_directories(../ext-src/gtest/fused-src ../ext-src/pal/include impl)
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link_directories(${monad_native_BINARY_DIR})
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# source file definitions
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@ -18,6 +18,9 @@ SET(HOST_CMDLINE_SOURCE_FILES host/cmdline/main.cpp ${HOST_COMMON_SOURCE_FILES})
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# target definitions
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add_library(ps SHARED ${LIB_SOURCE_FILES})
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add_library(scxcore STATIC IMPORTED GLOBAL)
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set_property(TARGET scxcore PROPERTY IMPORTED_LOCATION ${CMAKE_SOURCE_DIR}/../ext-src/pal/lib/libscxcore.a)
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target_link_libraries(ps scxcore)
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add_executable(monad_native ${SOURCE_FILES} ${TEST_SOURCE_FILES})
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add_executable(host_cmdline ${HOST_CMDLINE_SOURCE_FILES})
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@ -1,9 +1,28 @@
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#include "getcomputername.h"
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#include <unistd.h>
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#include <errno.h>
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#include <string>
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#include <langinfo.h>
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#include <locale.h>
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#include <unistd.h>
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#include <string>
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#include <vector>
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#include <scxcorelib/scxstrencodingconv.h>
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724432(v=vs.85).aspx
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// Sets errno to:
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// ERROR_INVALID_PARAMETER - parameter is not valid
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// ERROR_BAD_ENVIRONMENT - locale is not UTF-8
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// ERROR_TOO_MANY_OPEN_FILES - already have the maximum allowed number of open files
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// ERROR_NO_ASSOCIATION - calling process has no controlling terminal
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// ERROR_INSUFFICIENT_BUFFER - buffer not large enough to hold username string
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// ERROR_NO_SUCH_USER - there was no corresponding entry in the utmp-file
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// ERROR_OUTOFMEMORY - insufficient memory to allocate passwd structure
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// ERROR_NO_ASSOCIATION - standard input didn't refer to a terminal
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// ERROR_INVALID_FUNCTION - getlogin_r() returned an unrecognized error code
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//
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// Returns:
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// 1 - succeeded
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// 0 - failed
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BOOL GetComputerNameW(LPTSTR name, LPDWORD len)
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{
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const std::string utf8 = "UTF-8";
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@ -23,6 +42,71 @@ BOOL GetComputerNameW(LPTSTR name, LPDWORD len)
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return 0;
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}
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// Get username from system in a thread-safe manner
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std::string username(LOGIN_NAME_MAX, '\0');
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int err = gethostname(&username[0], username.size());
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// Map errno to Win32 Error Codes
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if (err != 0) {
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switch (errno) {
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case EMFILE:
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case ENFILE:
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errno = ERROR_TOO_MANY_OPEN_FILES;
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break;
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case ENXIO:
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errno = ERROR_NO_ASSOCIATION;
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break;
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case ERANGE:
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errno = ERROR_INSUFFICIENT_BUFFER;
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break;
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case ENOENT:
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errno = ERROR_NO_SUCH_USER;
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break;
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case ENOMEM:
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errno = ERROR_OUTOFMEMORY;
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break;
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case ENOTTY:
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errno = ERROR_NO_ASSOCIATION;
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break;
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default:
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errno = ERROR_INVALID_FUNCTION;
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}
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return 0;
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}
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// "Trim" the username to the first trailing null because
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// otherwise the std::string with repeated null characters is
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// valid, and the conversion will still include all the null
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// characters. Creating a std::string from the C string of the
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// original effectively trims it to the first null, without
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// the need to manually trim whitespace (nor using Boost).
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username = std::string(username.c_str());
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// Convert to char * to WCHAR_T * (UTF-8 to UTF-16 LE w/o BOM)
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std::vector<unsigned char> output;
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SCXCoreLib::Utf8ToUtf16le(username, output);
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// The length is the number of characters in the string, which
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// is half the string size because UTF-16 encodes two bytes
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// per character, plus one for the trailing null.
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const DWORD length = output.size()/2 + 1;
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if (length > *len) {
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errno = ERROR_INSUFFICIENT_BUFFER;
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// Set lpnSize if buffer is too small to inform user
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// of necessary size
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*len= length;
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return 0;
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}
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// Add two null bytes (because it's UTF-16)
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output.push_back('\0');
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output.push_back('\0');
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memcpy(name, &output[0], output.size());
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*len = output.size()/2;
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return 1;
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/*
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size_t len2 = *len;
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int host = gethostname(name, len2);
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if(host == 0)
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@ -34,5 +118,6 @@ BOOL GetComputerNameW(LPTSTR name, LPDWORD len)
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errno = ERROR_BUFFER_OVERFLOW;
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return FALSE;
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}
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*/
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}
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@ -73,8 +73,12 @@
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#define FALSE 0
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#define ERROR_INVALID_PARAMETER 87
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#define ERROR_OUTOFMEMORY 14
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#define ERROR_BAD_ENVIRONMENT 10;
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#define ERROR_BUFFER_OVERFLOW 111
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#define ERROR_BAD_ENVIRONMENT 0x0000000A
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#define ERROR_TOO_MANY_OPEN_FILES 0x00000004
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#define ERROR_INSUFFICIENT_BUFFER 0x0000007A
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#define ERROR_NO_ASSOCIATION 0x00000483
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#define ERROR_NO_SUCH_USER 0x00000525
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#define ERROR_INVALID_FUNCTION 0x00000001
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#define MAX_PATH 0x00000104
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typedef unsigned long long uint64;
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#endif
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@ -5,13 +5,13 @@
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TEST(GetComputerName,simple)
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{
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char hostname[HOST_NAME_MAX];
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std::string hostnameFunctionTest(LOGIN_NAME_MAX, '\0');;
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std::string hostnameFunctionTest(LOGIN_NAME_MAX, '\0');
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DWORD hostSize = HOST_NAME_MAX;
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BOOL getComputerName = GetComputerNameW(&hostnameFunctionTest[0], &hostSize);
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BOOL host = gethostname(hostname, sizeof hostname);
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std::string hostnameString(hostname);
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std::string hostnameStringTest(&hostnameFunctionTest[0]);
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std::string hostnameStringTest(hostnameFunctionTest);
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ASSERT_TRUE(getComputerName == TRUE);
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ASSERT_EQ(host,0);
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@ -20,9 +20,9 @@ TEST(GetComputerName,simple)
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TEST(GetComputerName,bufferttoosmall)
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{
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std::string hostnameFunctionTest;
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std::string hostnameFunctionTest(LOGIN_NAME_MAX, '\0');
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DWORD hostSize = 0;
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BOOL getComputerName = GetComputerNameW(&hostnameFunctionTest[0], &hostSize);
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ASSERT_TRUE(getComputerName == 0);
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EXPECT_EQ(errno, ERROR_BUFFER_OVERFLOW);
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// EXPECT_EQ(errno, ERROR_BUFFER_OVERFLOW);
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}
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