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pseudofs: Ignore unsupported command in vop_setattr.
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Authored by johalun on May 28 2019, 8:28 PM.

Details

Summary

Users of pseudofs (e.g. lindebugfs), should be able to receive
input from command line via commands like "echo 1 > /path/to/file".
Currently this fails because sh tries to truncate the file first and
vop_setattr returns not supported error for this.

As per mailing list discussion, this patch simply ignores the
error and returns 0 instead.

Test Plan

Tested and this patch solves this issue for lindebugfs.

Diff Detail

Repository
rS FreeBSD src repository - subversion
Lint
Automatic diff as part of commit; lint not applicable.
Unit
Automatic diff as part of commit; unit tests not applicable.