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add: [system] obtained the string describing error number in Linux

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mutouyun 2022-08-14 13:25:21 +08:00
parent c51395c033
commit 6329d6c66b
2 changed files with 9 additions and 3 deletions
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7
src/libimp/platform/posix/system.h
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@ -34,15 +34,20 @@ void error_code(result_code code) noexcept {
/** /**
* @brief Gets a text description of the system error * @brief Gets a text description of the system error
* https://man7.org/linux/man-pages/man3/strerror_l.3.html * https://man7.org/linux/man-pages/man3/strerror_l.3.html
* https://manpages.ubuntu.com/manpages/xenial/en/man3/strerror.3.html
*/ */
std::string error_msg(result_code code) noexcept { std::string error_msg(result_code code) noexcept {
LIBIMP_LOG_();
char msg_buf[256] {}; char msg_buf[256] {};
#if ((_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600) && !_GNU_SOURCE)
LIBIMP_LOG_();
if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) { if (::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf)) != 0) {
log.error("strerror_r fails. return = {}", error_code()); log.error("strerror_r fails. return = {}", error_code());
return {}; return {};
} }
return msg_buf; return msg_buf;
#else
return ::strerror_r((int)code.value(), msg_buf, sizeof(msg_buf));
#endif
} }
} // namespace sys } // namespace sys

5
test/test_imp_system.cpp
View File

@ -52,7 +52,8 @@ TEST(system, error_msg) {
EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt); EXPECT_EQ(imp::sys::error_msg({false, ERROR_INVALID_HANDLE}), s_txt);
} }
#else #else
EXPECT_EQ(imp::sys::error_msg({}), ""); EXPECT_EQ(imp::sys::error_msg({false, 1234}), "Unknown error 1234");
EXPECT_EQ(imp::sys::error_msg({false, EINVAL}), ""); EXPECT_EQ(imp::sys::error_msg({}), "Success");
EXPECT_EQ(imp::sys::error_msg({false, EINVAL}), "Invalid argument");
#endif #endif
} }