This diff upgrades top(1) from 3.5-beta12 to 3.8-beta1. Upstream changed significantly between these releases. The following list shows notable upstream changes:

• The process count in the header counts system processes regardless of whether they're displayed (-S). Previous behavior was to only count them if they're being displayed.

• The uptime field in the header now matches uptime(1). Previously, it was 30 seconds behind.

• top(1) now supports color via the TOPCOLORS environment variable.

• Process priority is no longer normalized by subtracting PZERO.

• There's a new summary line for the kernel, with per-second rates for context switches, traps, page faults, etc.

I made the following changes from the upstream version in vendor/top/dist:

• Implement jail ID display column. The runtime command 'j' and command-line option -j toggle display of the column.

• Implement filtering by jail with the runtime command 'J' and command-line option -J, with the same semantics as the previous version.

• Implement display of an ARC summary line for systems with ZFS. This includes color tag support.

• Implement the lastpid field in the freebsd-specific code so that it appears in the interface.

• Replace strcpy() with strlcpy().

• Add static assertion in utils.c to warn of problems if sizeof(int) is ever greater than 4.

• Fix a bug that referenced a nonexistent sysctl in m_freebsd.c: s/smp.smp_active/kern.smp.active/

• Pass _PATH_DEVNULL as second arg to kvm_open() to allow non-root users to view process command lines.

• Patch thread display to show thread name to maintain behavior of previous version.

• Make -m take 'cpu' and 'io' in addition to '0' and '1' to keep the behavior of our patch.

• Make -H an alias for -t to preserve old behavior.

• Document all modified behavior in the man page.

Remaining problems:

• Displaying full command lines doesn't work because kvm_read() in m_freebsd.c returns "short read" (0 bytes). I'm not sure why.

• There are conflicting arguments between upstream and FreeBSD's local patches:
  
  Conflicting runtime commands: CMD OLD NEW C toggle CPU/WCPU toggle color P toggle per-CPU statistics sort by CPU usage t toggle display of this process alias for H (display threads)
  
  Old commands not yet ported: CMD OLD NEW e show last error from kill/renice - z toggle display of system idle process - a toggle full process titles -
  
  Conflicting arguments: CMD OLD NEW -C toggle CPU/WCPU display toggle color -a show full command names don't limit number of processes -t do not display this process show threads
  
  Old arguments not yet ported: CMD OLD NEW -P per-CPU statics - -z do not show the system idle process -