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base-linux: Log error message for too long files

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The filename buffer of a dataspace in base-linux is limited to
40 bytes. When using file names longer than this, the remainder
gets dropped silently. Add an error message to aid debugging this
case.
This commit is contained in:
Alexander Senier 2017-08-12 19:32:06 +02:00 committed by Christian Helmuth
parent 23db75deff
commit ee40d29b91
1 changed files with 6 additions and 0 deletions
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6
repos/base-linux/src/core/dataspace_component.cc
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@ -35,6 +35,12 @@ Linux_dataspace::Filename Dataspace_component::_file_name(const char *args)
{
Session_label const label = label_from_args(args);
Linux_dataspace::Filename fname;
if (label.last_element().length() > sizeof(fname.buf)) {
Genode::error("file name too long: ", label.last_element());
throw Service_denied();
}
strncpy(fname.buf, label.last_element().string(), sizeof(fname.buf));
/* only files inside the current working directory are allowed */