utilities: Prevent deadlock in rm_util_is_nonstripped #557
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Only attempt to open regular files. It is entirely possible that we encounter an executable FIFO, which causes open() to block indefinitely if it is not opened for writing by another process. Fixes sahib#555
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Only attempt to open regular files. It is entirely possible that we
encounter an executable FIFO, which causes open() to block indefinitely
if it is not opened for writing by another process.
Fixes #555