[Bug-tar] [PATCH] tar --atime-preserve errors with read-only source

[Ondřej Vašík]

Hello, 
as reported in https://bugzilla.redhat.com/show_bug.cgi?id=500742 by
Bruce Jerrick, tar --atime-preserve produces an error when source files
are on read-only filesystem as it tries utime() to reset atime, and that
fails. Attached patch should fix that behaviour - ignoring EROFS return
value.

Greetings,
         Ondřej Vašík

tar-1.22-atime-rofs.patch
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