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21 lines
943 B
21 lines
943 B
diff -up diffutils-3.6/src/cmp.c.cmp-s-empty diffutils-3.6/src/cmp.c
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--- diffutils-3.6/src/cmp.c.cmp-s-empty 2017-05-18 18:39:59.000000000 +0100
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+++ diffutils-3.6/src/cmp.c 2017-05-22 10:53:28.477147864 +0100
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@@ -330,12 +330,15 @@ main (int argc, char **argv)
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/* If only a return code is needed,
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and if both input descriptors are associated with plain files,
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+ and if both files are larger than 0 bytes (procfs files are always 0),
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conclude that the files differ if they have different sizes
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and if more bytes will be compared than are in the smaller file. */
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if (comparison_type == type_status
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&& S_ISREG (stat_buf[0].st_mode)
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- && S_ISREG (stat_buf[1].st_mode))
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+ && S_ISREG (stat_buf[1].st_mode)
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+ && stat_buf[0].st_size > 0
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+ && stat_buf[1].st_size > 0)
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{
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off_t s0 = stat_buf[0].st_size - file_position (0);
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off_t s1 = stat_buf[1].st_size - file_position (1);
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