[MacPorts] #53387: Pextlib/xinstall : don't ignore directory chmod errors silently

[MacPorts]

#53387: Pextlib/xinstall : don't ignore directory chmod errors silently
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 Reporter:  RJVB         |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:
 Keywords:  haspatch     |       Port:
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 As discussed on the ML, Pextlib's InstallCmd() (xinstall callback) ignores
 errors that occur setting the requested or default permissions. That's
 probably not a good idea; the attached patch adds error handling that's
 near-identical to handling fchmod() errors elsewhere in the same file.

 I have not removed the patch hunks that add a verbose (-v) mode to
 xinstall, you can take them as a FYI.

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Ticket URL: <https://trac.macports.org/ticket/53387>
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