[Bug 191263] [patch] dd(1): Incorrect casting of arguments

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Sun Sep 21 21:44:37 UTC 2014


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=191263

--- Comment #4 from will at worrbase.com ---
Old:
 [ worr on terra ] ( ~ ) % dd if=/dev/zero of=/dev/null
count=18446744073709551616
dd: count: Result too large
 [ worr on terra ] ( ~ ) % dd if=/dev/zero of=/dev/null
count=18446744073709551615
dd: count cannot be negative
 [ worr on terra ] ( ~ ) % dd if=/dev/zero of=/dev/null
count=18446744073709551614
dd: count cannot be negative

New:
 [ root on dev ] ( ~ ) # ./base/bin/dd/dd if=/dev/zero of=/dev/null
count=18446744073709551616
dd: count: Result too large
 [ root on dev ] ( ~ ) # ./base/bin/dd/dd if=/dev/zero of=/dev/null
count=18446744073709551615
dd: count: Result too large
 [ root on dev ] ( ~ ) # ./base/bin/dd/dd if=/dev/zero of=/dev/null
count=18446744073709551614
^C1997704+0 records in
1997704+0 records out
1022824448 bytes transferred in 1.030049 secs (992986238 bytes/sec)

My last patch had a small error in it where it wouldn't accept SIZE_MAX as an
argument to count (special handling happens here for the case where count is
unspecified). What should be the final patch is now posted.

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