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AK+LibSystem+LibMain: Add Error::from_syscall() for syscall failures

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This creates an error that contains the name of the syscall that failed.
This allows error handlers to print out the name of the call if they
want to. :^)
This commit is contained in:
Andreas Kling 2021-11-22 16:00:53 +01:00
parent d3cf68a540
commit 4e530135d5
3 changed files with 26 additions and 7 deletions
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10
AK/Error.h
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@ -21,9 +21,11 @@ namespace AK {
class Error {
public:
static Error from_errno(int code) { return Error(code); }
static Error from_syscall(StringView syscall_name, int rc) { return Error(syscall_name, rc); }
static Error from_string_literal(StringView string_literal) { return Error(string_literal); }
bool is_errno() const { return m_code != 0; }
bool is_syscall() const { return m_syscall; }
int code() const { return m_code; }
StringView string_literal() const { return m_string_literal; }
@ -40,8 +42,16 @@ private:
{
}
Error(StringView syscall_name, int rc)
: m_code(-rc)
, m_string_literal(syscall_name)
, m_syscall(true)
{
}
int m_code { 0 };
StringView m_string_literal;
bool m_syscall { false };
};
template<typename T, typename ErrorType>