XPG3 and later require it to be made visible by inclusion of <limits.h>,
which, in turn, includes <sys/syslimits.h>. The <sys/param.h> API is not
affected by this change, since <sys/syslimits.h> is included from there, too.
tape driver. Basically, we'll report what we can for resid, dsreg will
reflect RDONLY and MOUNTED, and erreg will retain the last seen Sense Key.
An MTIOCGET will clear these.
necessary since the `label_t' type is defined for _KERNEL source only, and
there are userlevel sources (i.e. filesystem maintenance tools) that make use
of kernel source files which include this header; also, using the (different)
kernel implementations and prototypes of setjmp()/longjmp() would be wrong
for these programs.
as with user-land programs, include files are installed by each directory
in the tree that has includes to install. (This allows more flexibility
as to what gets installed, makes 'partial installs' easier, and gives us
more options as to which machines' includes get installed at any given
time.) The old SYS_INCLUDES={symlinks,copies} behaviours are _both_
still supported, though at least one bug in the 'symlinks' case is
fixed by this change. Include files can't be build before installation,
so directories that have includes as targets (e.g. dev/pci) have to move
those targets into a different Makefile.
operator:
* FSYNC_WAIT, which requests the synchronization operation to not return
until completition,
* FSYNC_DATAONLY, which is a hint: if possible, synchronize file data
only. If it's not feasible for a file system implementation to omit
file status synchronization when synchronizing file data, this is ignored.
release the first 96 bits of the hash directly rather than by folding.
The full 160 bit hash is mixed back into the entropy pool. This keeps
64 bits secret to stir the pool with.
_SC_XOPEN_SHM to query the system page size, the availability of the
File Synchronization Option and the availability of System V style shared
memory, respectively, at runtime.
* Define _POSIX_FSYNC to evaluate to 1, since fsync(2) is always available.
