Botan::System_Error Class Reference

#include <exceptn.h>

Inheritance diagram for Botan::System_Error:

Public Member Functions
int	error_code () const noexcept override
ErrorType	error_type () const noexcept override
	System_Error (const std::string &msg)
	System_Error (const std::string &msg, int err_code)
const char *	what () const noexcept override

Detailed Description

System_Error

This exception is thrown in the event of an error related to interacting with the operating system.

This exception type also (optionally) captures an integer error code eg POSIX errno or Windows GetLastError.

Definition at line 296 of file exceptn.h.

Constructor & Destructor Documentation

System_Error() [1/2]

Botan::System_Error::System_Error ( const std::string &  msg )

inline

Definition at line 299 of file exceptn.h.

: Exception(msg), m_error_code(0) {}

System_Error() [2/2]

Botan::System_Error::System_Error	(	const std::string &	msg,
		int	err_code
	)

Definition at line 108 of file exceptn.cpp.

                                                             :
   Exception(msg + " error code " + std::to_string(err_code)),
   m_error_code(err_code)
   {}

Member Function Documentation

error_code()

int Botan::System_Error::error_code ( ) const

inlineoverridevirtualnoexcept

Return an error code associated with this exception, or otherwise 0.

The domain of this error varies depending on the source, for example on POSIX systems it might be errno, while on a Windows system it might be the result of GetLastError or WSAGetLastError. For error_type() is OpenSSLError, it will (if nonzero) be an OpenSSL error code from ERR_get_error.

Reimplemented from Botan::Exception.

Definition at line 305 of file exceptn.h.

{ return m_error_code; }

error_type()

ErrorType Botan::System_Error::error_type ( ) const

inlineoverridevirtualnoexcept

Return the "type" of error which occurred.

Reimplemented from Botan::Exception.

Definition at line 303 of file exceptn.h.

References Botan::SystemError.

{ return ErrorType::SystemError; }

what()

const char* Botan::Exception::what ( ) const

inlineoverridenoexceptinherited

Return a descriptive string which is hopefully comprehensible to a developer. It will likely not be useful for an end user.

The string has no particular format, and the content of exception messages may change from release to release. Thus the main use of this function is for logging or debugging.

Definition at line 87 of file exceptn.h.

Referenced by Botan::RSA_PrivateKey::create_decryption_op(), Botan::RSA_PublicKey::create_encryption_op(), and Botan_FFI::ffi_guard_thunk().

{ return m_msg.c_str(); }

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The documentation for this class was generated from the following files:

• src/lib/utils/exceptn.h
• src/lib/utils/exceptn.cpp