confstr function
Get the value of the string-valued system variable NAME.
Implementation
String confstr(
int name,
) {
_confstr ??= Libc().dylib.lookupFunction<
ffi.Uint64 Function(ffi.Int32, ffi.Pointer<ffi.Void>, ffi.Uint64),
_dart_confstr>('confstr');
final len = _confstr!(
name,
ffi.nullptr,
0,
);
if (len == 0) {
throw PosixException(strerror(errno()), errno());
}
final cBuf = malloc.allocate<ffi.Void>(len);
final result = _confstr!(
name,
cBuf,
len,
);
if (result == 0) {
throw PosixException(strerror(errno()), errno());
}
return copyCBuffToDartString(cBuf);
}