Add some constness to avoid some warnings.
Remove use register keyword.
Deal with missing/unneeded extern/prototypes.
Some minor type changes/casts to avoid warnings.
Reviewed by: md5
deprecation warning from the utility and manual page. Since this utility
is required by POSIX, it's not likely to be removed any time soon.
This is leading up to the addition of the P1003.1-2001 -s -A -j -N -t options.
PR: 36783
strtol -> strtoll
fseek -> fseeko
NOTE: that fseek not works for >long offsets files per POSIX:
[EOVERFLOW] For fseek( ), the resulting file offset would be a value which
cannot be represented correctly in an object of type long.