** Bug fixes
mv could mistakenly fail to preserve hard links when moving two
or more arguments between partitions.
`cp --sparse=always F /dev/hdx' no longer tries to use lseek to create
holes in the destination.
nohup now sets the close-on-exec flag for its copy of the stderr file
descriptor. This avoids some nohup-induced hangs. For example, before
this change, if you ran `ssh localhost', then `nohup sleep 600 </dev/null &',
and then exited that remote shell, the ssh session would hang until the
10-minute sleep terminated. With the fixed nohup, the ssh session
terminates immediately.
`expr' now conforms to POSIX better:
Integers like -0 and 00 are now treated as zero.
The `|' operator now returns 0, not its first argument, if both
arguments are null or zero. E.g., `expr "" \| ""' now returns 0,
not the empty string.
The `|' and `&' operators now use short-circuit evaluation, e.g.,
`expr 1 \| 1 / 0' no longer reports a division by zero.
** New features
`chown user.group file' now has its traditional meaning even when
conforming to POSIX 1003.1-2001, so long as no user has a name
containing `.' that happens to equal `user.group'.
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