getpid

Berkely的学生写的

#!/bin/sh
# $Id: getpid,v 1.1 1999/01/05 07:13:39 ranga Exp $
# get pid of a process by name

# function to print the usage message and exit

printUSAGE() {  
    echo "Usage: `basename $0` [-v] name" 1>&2
    exit 1
}

if [ $# -lt 1 ] ; then printUSAGE ; fi

FLD='2'
if [ "$1" = "-v" ] ; then
    if [ -z "$2" ] ; then printUSAGE ; fi
    FLD='0'
    shift
fi

PSOPTS="-ef" 
    
OSNAME=`uname -s | tr '[A-Z]' '[a-z]'`
case "$OSNAME" in
    *bsd|linux) PSOPTS="-auwx"
esac

/bin/ps $PSOPTS 2> /dev/null | 
    grep "$1"                | 
    grep -v "$0"             |
    grep -v grep             |    
    awk '{ print $fld ; }' fld="$FLD"

exit $?