Shell Programming and Scripting

print "stuff" | "sort -k4"

cmd = "sort -k4"
print "stuff" | cmd
....
close(cmd)

cmd = "sort -k4 > output.txt"

print "header"
while ((getline < "output.txt") > 0) {
    print;
}
print "footer"

printf ( format,usersize, u_count[i], i)  | "sort -k4";break } } }

#!/usr/bin/env bash
#
# 
# Bash Script written by R. Blaas
#
# This script will find files of a specific type and displays the full path and size
# Also a total of found files and size is displayed per Department and an overal total found files and size
# 
# if nothing is passed to the script, show usage and exit
[[ -n "$1" ]] || { echo “Usage: usage.sh [Variable]“; exit 0 ; }

# Make sure only root can run our script
if [ "$(id -u)" != "0" ]; then
    echo "This script must be run as root" 1>&2
    exit 1
fi

# Variables
POSTMASTER="My email"

DATE=`date +"%d%m%Y"` 
DATIME=`date +"%Y%m%d%H%M"`
DAGNAAM=`date +"%A"`

# Set current directory to variable $CURRENT
CURRENT=/opt/local/COMPANY/usage

# Set the log directory
DIR_LOG=$CURRENT"/log"

# Catch search variable
SEARCH=`echo $1 | sed 's/*//' | sed 's/.//'`

# Check if directory exists
if test ! -d "$DIR_LOG"
 then
    mkdir "$DIR_LOG"
fi

# Create temporary file for log messages
POSTMLOG=$DIR_LOG"/"$SEARCH"-usage.log"

# BEGIN
logger "Script start (usage.sh)"
echo `date` start of script usage.sh > $POSTMLOG
echo "" >> $POSTMLOG
echo Search variable = $SEARCH >> $POSTMLOG
echo "" >> $POSTMLOG

# Search Command where $1 is the type to find. Search will start at current location.
find . -iname $1 -exec ls -l {} \; | awk 'BEGIN { 

# Initialize all Arrays
    size = "0"; 
    u_count[""]=0;
    all_count[""]=0;
} 
{
# Assign field names
    sizes=$5
    split($9,a,"/")
    dept=a[2]

# Count of number of files
    u_count[dept]++;
    all_count["* *"]++;

# Count disc space used
    u_size[dept]+=sizes;
    all_size["* *"]+=sizes;
}
{
    for (I=9 ; I<=NF ; I++) { x++ } { size=size+$5 } 
}
END { hum[1024**4]="Tb"; hum[1024**3]="Gb"; hum[1024**2]="Mb"; hum[1024]="Kb"; 
    for (x=1024**4; x>=1024; x/=1024) { if (size>=x) { { printf "Total Size = ",NR } 
    printf "%.2f %s\n\n",size/x,hum[x];break } 
    }
}

# Output
{
        for (I=9 ; I<=NF ; I++) { x++ } { size=size+$5 }
}
END    { { FS = ":";
    format = "%11s %6s %-16s\n";
    prinft "\n"
    printf ( format, "Size","Count","Who" ) }

    for (i in u_count) {
        if (i != "") {
        { hum[1024**4]="Tb"; hum[1024**3]="Gb"; hum[1024**2]="Mb"; hum[1024]="Kb";
        for (x=1024**4; x>=1024; x/=1024) { if (u_size[i]>=x) {
    usersize = sprintf ( "%.2f %s", u_size[i]/x,hum[x] )
        printf ( format,usersize, u_count[i], i);break } } } 
              } 
        }
}  
{
        for (I=9 ; I<=NF ; I++) { x++ } { size=size+$5 }
}
END     { for (i in all_count) {
        if (i != "") {
        { hum[1024**4]="Tb"; hum[1024**3]="Gb"; hum[1024**2]="Mb"; hum[1024]="Kb";
        for (x=1024**4; x>=1024; x/=1024) { if (all_size[i]>=x) {
    allsize = sprintf ( "%.2f %s", all_size[i]/x,hum[x] )
        printf ( format,allsize, all_count[i], "Total");break } } } 
            } 
    } 
}' >> $POSTMLOG

echo "" >> $POSTMLOG
echo `date` end of search >> $POSTMLOG

echo `date` send report to POSTMASTER >> $POSTMLOG

# Mail report to POSTMASTER
mail -s " usage.sh REPORT `date`" $POSTMASTER < $POSTMLOG
 if [ "$?" == "0" ]; then
  echo Mail sent successful! >> $POSTMLOG
 else echo Mail sent unsuccesful! >> $POSTMLOG
 fi

echo "" >> $POSTMLOG
echo `date` end of script usage.sh >> $POSTMLOG
echo "" >> $POSTMLOG

# Preserving logfile
mv "$POSTMLOG" "$DIR_LOG/$DATIME-$SEARCH-usage.log"

logger "Script end (usage.sh)"

END     { for (i in all_count) {
        if (i != "") {
        { hum[1024**4]="Tb"; hum[1024**3]="Gb"; hum[1024**2]="Mb"; hum[1024]="Kb";
        for (x=1024**4; x>=1024; x/=1024) { if (all_size[i]>=x) {
    allsize = sprintf ( "%.2f %s", all_size[i]/x,hum[x] )
        printf ( format,allsize, all_count[i], "Total");break } } } 
            } 
    } 
}' | sort -rk3 >> $POSTMLOG

    Size  Count Who             
   6.16 Gb    308 Total           
  63.02 Mb     56 Automatisering  
   3.64 Mb      1 Karaoke         
  45.79 Mb      2 Muziekfeesten   
   4.95 Gb    175 Opgelicht       
  72.67 Mb     12 Radar           
 493.33 Mb     24 RegelRecht      
 410.69 Mb     10 Vermist         
 146.40 Mb     28 Zappsport