#! /usr/bin/env bash
#
#  top
#
#  Outputs one line per active process as follows:
#
#           <pid> <vsize bytes> <rss in bytes> <%cpu> <cmdline>

. `dirname $0`/../zeekctl-config.sh

cmd_Linux='top -b -n 1 | awk "/^ *[0-9]+ /{printf(\"%d %s %s %d %s\\n\", \$1, \$5, \$6, \$9, \$12)}"'

# Note: On non-SMP FreeBSD, the 9th column (the "C" column) is missing, so the
# awk command here accounts for this.
# Note: When myricom drivers are in use, there could be a space in the 8th
# column (the STATE column), so here the awk command accounts for this.
cmd_FreeBSD='top -u -b all | tail -n +5 | awk "/^ *[0-9]+ /{c11=11; c12=12; if(NF==11) {c11--; c12--;} else if(NF==13) {c11++; c12++;} printf(\"%d %s %s %d %s\\n\", \$1, \$6, \$7, \$c11, \$c12)}"'

cmd_OpenBSD='top -u -b all | tail -n +5 | awk "/^ *[0-9]+ /{printf(\"%d %s %s %d %s\\n\", \$1, \$5, \$6, \$10, \$11)}"'
cmd_NetBSD='top -u -b all | tail -n +5 | awk "/^ *[0-9]+ /{printf(\"%d %s %s %d %s\\n\", \$1, \$5, \$6, \$10, \$11)}"'

# top on Mac OS X is different.  It doesn't give CPU utilization until the
# second sample so we are getting two samples with zero delay between them.
# The awk command removes the first sample from the output and converts the
# CPU percentages to integers.  The sed command removes the trailing + or -
# signs that sometimes occur with the memory statistics.
# NOTE: on OS X 10.10 or newer, the top "vprvt" option no longer works,
# so "mem" is used here instead.
cmd_Darwin='top -l 2 -s0 -stats pid,mem,rsize,cpu,command | awk -v c=0 "{ if(\$1 == \"PID\") c++; else if(c>1) printf(\"%d %s %s %d %s\n\", \$1, \$2, \$3, \$4, \$5)}" | sed "s/[+-] / /g"'

eval cmd="\$cmd_${os}"

if [ -z "$cmd" ]; then
    echo "unrecognized os: ${os}" >&2
    exit 1
fi

unset LINES
unset COLUMNS

eval $cmd | awk -v start_field=2 -v end_field=3 -v def_factor=1024 -f "${helperdir}/to-bytes.awk"
