Grep Running Processes (psgrep)

psgrep.sh

#!/bin/bash
 
################################################################################
## Similar to run:  ps aux | grep "RegExp"                                    ##
## Script that receives a list o keywords and search then in "ps axw" command ##
## and returns ps's header and processes that where found with keywords.      ##
## Accepts grep options, like '-c' to count number of matched processes.      ##
################################################################################

if [ "$#" -eq 0 ]; then
    echo -e "Must inform at least 1 argument.\n  Use '-w' for watch and '-c' for count.\n" && exit 1;
fi

options=''
count=''
words=''
watch=''
seconds=1

for arg in "$@"; do
    if [[ $arg =~ ^- ]]; then
        if [[ $arg =~ ^-w ]]; then
            watch=1
            if [[ $arg =~ ([0-9]+) ]]; then
                seconds=${BASH_REMATCH[1]}
            fi
        else
            if [[ $arg =~ ^-c ]]; then
                count=1
            fi
            options="$options $arg"
        fi
    else
        if [ -z $words ]; then
            words="$arg"
        else
            words="$words|$arg"
        fi
    fi
done

if [ -z $watch ]; then
    if [ -z $count ]; then
        ps axw -o ppid,pid,user,%cpu,%mem,vsz,rss,wchan,nlwp,stime,etime,args | grep -v -e $0 -e $$ | egrep $options "(ELAPSED|$words)" --color=auto
    else
        ps axw -o ppid,pid,args | grep -v -e $0 -e $$ | egrep $options "($words)" --color=auto
    fi
else
    echo " ## Starting Watch ($seconds seconds) ##"
    while [ 1 ]; do
        echo -e "\n ## $(date)\n";
        ps axw -o ppid,pid,user,%cpu,%mem,vsz,rss,wchan,nlwp,stime,etime,args | grep -v -e $0 -e $$ | egrep $options "(ELAPSED|$words)" --color=auto;
        sleep $seconds;
    done
fi

exit 0;