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22 lines
877 B
22 lines
877 B
7 years ago
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diff --git a/lib/system.h b/lib/system.h
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index ef46267..e7f531c 100644
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--- a/lib/system.h
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+++ b/lib/system.h
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@@ -389,9 +389,16 @@ extern int errno;
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# define ST_NBLOCKSIZE 512
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#endif
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+/* Network Appliance file systems store small files directly in the
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+ inode if st_size <= 64; in this case the number of blocks can be
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+ zero. Perhaps other file systems have similar problems; so,
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+ somewhat arbitrarily, do not consider a file to be sparse if
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+ it has no blocks but st_size < ST_NBLOCKSIZE. */
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#define ST_IS_SPARSE(st) \
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(ST_NBLOCKS (st) \
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- < ((st).st_size / ST_NBLOCKSIZE + ((st).st_size % ST_NBLOCKSIZE != 0)))
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+ < ((st).st_size / ST_NBLOCKSIZE \
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+ + ((st).st_size % ST_NBLOCKSIZE != 0 \
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+ && (st).st_size / ST_NBLOCKSIZE != 0)))
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/* Declare standard functions. */
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