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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
Notes: sideshowbarker 2024-07-18 00:52:47 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/4e530135d55
3 changed files with 26 additions and 7 deletions
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9
Userland/Libraries/LibMain/Main.cpp
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@@ -8,6 +8,7 @@
#include <AK/StringView.h>
#include <AK/Vector.h>
#include <LibMain/Main.h>
#include <string.h>
int main(int argc, char** argv)
{
@@ -22,7 +23,13 @@ int main(int argc, char** argv)
.arguments = arguments.span(),
});
if (result.is_error()) {
warnln("Runtime error: {}", result.error());
auto error = result.release_error();
if (error.is_syscall())
warnln("Runtime error: {}: {} (errno={})", error.string_literal(), strerror(error.code()), error.code());
else if (error.is_errno())
warnln("Runtime error: {} (errno={})", strerror(error.code()), error.code());
else
warnln("Runtime error: {}", error.string_literal());
return 1;
}
return result.value();