Sergey Bugaev 47d83800e1 Kernel+LibC: Do not return -ENAMETOOLONG from sys$readlink() ...

That's not how readlink() is supposed to work: it should copy as many bytes
as fit into the buffer, and return the number of bytes copied. So do that,
but add a twist: make sys$readlink() actually return the whole size, not
the number of bytes copied. We fix up this return value in userspace, to make
LibC's readlink() behave as expected, but this will also allow other code
to allocate a buffer of just the right size.

Also, avoid an extra copy of the link target.

2020-06-17 15:02:03 +02:00

158 KiB

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