#!/system/bin/sh
#
# procrank output looks something like:
#
#  PID      Vss      Rss      Pss      Uss  cmdline
#  106  116248K  102028K   93063K   85636K  /system/b2g/b2g
#  409   49056K   37676K   28768K   21372K  /system/b2g/plugin-container
#  110    3720K    3712K    3139K    3032K  /system/bin/rild
#  112    5076K    5076K    2664K    1768K  /system/bin/mediaserver
#...
#   99     276K     272K      99K      92K  /system/bin/servicemanager
#                          ------   ------  ------
#                         136259K  118928K  TOTAL

report_oom=0
report_nice=0

for arg in "$@"; do
  case "$arg" in
    "--oom")
      report_oom=1
      ;;
    "--nice")
      report_nice=1
      ;; 
    *)
      args="${args} ${arg}"
      ;;
  esac
done

procrank $args | (
  IFS= read header;

  new_hdr="APPLICATION     "
  new_ftr="                "
  if [ "${report_nice}" == "1" ]; then
    new_hdr="${new_hdr} NICE"
    new_ftr="${new_ftr} "
  fi
  if [ "${report_oom}" == "1" ]; then
    new_hdr="${new_hdr}  OOM_ADJ  OOM_SCORE  OOM_SCORE_ADJ"
    new_ftr="${new_ftr}                                   "
  fi
  echo "${new_hdr} ${header}"

  while IFS= read line; do
    if [ "${line/*b2g*/b2g}" = "b2g" ]; then
      echo "${line}" | (
        read pid rest;
        comm="$(cat /proc/${pid}/comm)                "
        new_fields="${comm:0:16}"
        if [ "${report_nice}" == "1" ]; then
          # Process names are a pain in the ass, since they can have embedded spaces
          # Fortunately, it's surrounded by parens, so we break the line based on closing
          # paren, and then read in individual fields
          trail=$(cat /proc/${pid}/stat | (IFS=')' read a b; echo -n $b))
          nice="$(echo $trail | (read state ppid pgrp session tty_nr tpgid flags minflt cminflt majflt cmajflt utime stime cutime cstime prio nice rest; echo $nice))    "
          new_fields="${new_fields} ${nice:0:4}"
        fi
        if [ "${report_oom}" == "1" ]; then
          oom_adj="   $(cat /proc/${pid}/oom_adj)    "
          oom_score="   $(cat /proc/${pid}/oom_score)      "
          oom_score_adj="    $(cat /proc/${pid}/oom_score_adj)         "
          new_fields="${new_fields}  ${oom_adj:0:7}  ${oom_score:0:9}  ${oom_score_adj:0:12} "
        fi

        echo "${new_fields} ${line}"
      )
    else
      sep=$(echo ${line})
      if [ "${sep:0:1}" = "-" ]; then
        echo "${new_ftr} ${line}"
        IFS= read line
        echo "${new_ftr} ${line}"
      fi
    fi
  done
)

if [ "${report_oom}" == "1" ]; then
  echo
  echo "/sys/module/lowmemorykiller/parameters/minfree:         $(cat /sys/module/lowmemorykiller/parameters/minfree)"
  echo "/sys/module/lowmemorykiller/parameters/adj:             $(cat /sys/module/lowmemorykiller/parameters/adj)"
  echo "/sys/module/lowmemorykiller/parameters/notify_trigger:  $(cat /sys/module/lowmemorykiller/parameters/notify_trigger)"
fi