Shell Programming and Scripting

#!/bin/bash
PLATFORM="AIX"
NEEDSPC=3000
set -x

if [ "${PLATFORM}" = "AIX" ]; then
    lsvg | grep -v rootvg | while read VGNAME
    do
        PPSTRG=$(lsvg ${VGNAME} | awk -F: '/PP SIZE/ {print $NF}')
        PPSIZE=$(echo ${PPSTRG} | awk '{print $1}')
        PPFREE=$(lsvg ${VGNAME} | awk -F: '/FREE PP/ {print $NF}' | awk '{print $1}')
        ((FREESPACE=${PPFREE}*${PPSIZE}))
        if [ ${FREESPACE} -gt ${NEEDSPC} ]; then
            printf "Sufficient free space for LV in ${VGNAME}\n"
            ((PPNEED=${NEEDSPC}/${PPSIZE}+1))
            NOTFREE=0
            break
        else
            printf "Insufficient space to create LV in ${VGNAME}\nFree space: ${FREESPACE} MB  Required: ${NEEDSPC} MB\nExpand ${VGNAME} and retry\n"
            NOTFREE=1
        fi
    done
    if [ ${NOTFREE} -eq 1 ]; then
        printf "nope\n"
        exit 64
    fi
else
    printf "Solaris\n"
fi
printf "NOTFREE: ${NOTFREE}\n"

prompt> ./dammit
+ '[' AIX = AIX ']'
+ lsvg
+ grep -v rootvg
+ read VGNAME
++ lsvg datavg
++ awk -F: '/PP SIZE/ {print $NF}'
+ PPSTRG='        256 megabyte(s)'
++ echo 256 'megabyte(s)'
++ awk '{print $1}'
+ PPSIZE=256
++ lsvg datavg
++ awk -F: '/FREE PP/ {print $NF}'
++ awk '{print $1}'
+ PPFREE=239
+ (( FREESPACE=239*256 ))
+ '[' 61184 -gt 3000 ']'
+ printf 'Sufficient free space for LV in datavg\n'
Sufficient free space for LV in datavg
+ NOTFREE=0
+ break
+ '[' -eq 1 ']'
./dammit: line 23: [: -eq: unary operator expected
+ printf 'NOTFREE: \n'
NOTFREE:

#!/bin/bash
PLATFORM="AIX"
FREESPACE=4
NEEDSPC=3
set -x

if [ "${PLATFORM}" = "AIX" ]; then
    if [ ${FREESPACE} -gt ${NEEDSPC} ]; then
        NOTFREE=0
    else
        NOTFREE=1
    fi
    if [ ${NOTFREE} -eq 1 ]; then
        printf "nope\n"
    fi
fi
printf "NOTFREE: ${NOTFREE}\n"

prompt> ./test.sh
+ '[' AIX = AIX ']'
+ '[' 4 -gt 3 ']'
+ NOTFREE=0
+ '[' 0 -eq 1 ']'
+ printf 'NOTFREE: 0\n'
NOTFREE: 0

prompt> bash --version
GNU bash, version 4.2.50(1)-release (powerpc-ibm-aix6.1.2.0)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

    while read VGNAME
    do
        PPSTRG=$(lsvg ${VGNAME} | awk -F: '/PP SIZE/ {print $NF}')
        ...
    done < <(lsvg | grep -v rootvg)
    ...

nimserver:/root# lsvg -l rootvg
rootvg:
LV NAME             TYPE       LPs     PPs     PVs  LV STATE      MOUNT POINT
hd5                 boot       1       2       2    closed/syncd  N/A
hd6                 paging     4       8       2    open/syncd    N/A
hd8                 jfs2log    1       2       2    open/syncd    N/A
hd4                 jfs2       12      24      2    open/syncd    /
hd2                 jfs2       26      52      2    open/syncd    /usr
...

nimserver:/root# lsvg rootvg
VOLUME GROUP:       rootvg                   VG IDENTIFIER:  00f6476900004c000000015cd4205282
VG STATE:           active                   PP SIZE:        256 megabyte(s)
VG PERMISSION:      read/write               TOTAL PPs:      1022 (261632 megabytes)
MAX LVs:            256                      FREE PPs:       790 (202240 megabytes)
LVs:                19                       USED PPs:       232 (59392 megabytes)
OPEN LVs:           18                       QUORUM:         1 (Disabled)
TOTAL PVs:          2                        VG DESCRIPTORS: 3
STALE PVs:          0                        STALE PPs:      0
ACTIVE PVs:         2                        AUTO ON:        no
MAX PPs per VG:     32512                                     
MAX PPs per PV:     1016                     MAX PVs:        32
LTG size (Dynamic): 256 kilobyte(s)          AUTO SYNC:      no
HOT SPARE:          no                       BB POLICY:      relocatable 
PV RESTRICTION:     none                     INFINITE RETRY: no
DISK BLOCK SIZE:    512                      CRITICAL VG:    no
FS SYNC OPTION:     no                       CRITICAL PVs:   no

nimserver:/root# lslv hd2   
LOGICAL VOLUME:     hd2                    VOLUME GROUP:   rootvg
LV IDENTIFIER:      00f6476900004c000000015cd4205282.5 PERMISSION:     read/write
VG STATE:           active/complete        LV STATE:       opened/syncd
TYPE:               jfs2                   WRITE VERIFY:   off
MAX LPs:            32512                  PP SIZE:        256 megabyte(s)
COPIES:             2                      SCHED POLICY:   parallel
LPs:                26                     PPs:            52
STALE PPs:          0                      BB POLICY:      relocatable
INTER-POLICY:       minimum                RELOCATABLE:    yes
INTRA-POLICY:       center                 UPPER BOUND:    32
MOUNT POINT:        /usr                   LABEL:          /usr
MIRROR WRITE CONSISTENCY: on/ACTIVE                              
EACH LP COPY ON A SEPARATE PV ?: yes                                    
Serialize IO ?:     NO                                     
INFINITE RETRY:     no                     PREFERRED READ: 0

nimserver:/root# lsvg -p rootvg
rootvg:
PV_NAME           PV STATE          TOTAL PPs   FREE PPs    FREE DISTRIBUTION
hdisk1            active            511           1         1..0..0..0..0
hdisk2            active            511           0         0..0..0..0..0

nimserver:/root# lsvg -p rootvg
rootvg:
PV_NAME           PV STATE          TOTAL PPs   FREE PPs    FREE DISTRIBUTION
hdisk1            active            511          20         10..0..0..0..10
hdisk2            active            511           0         0..0..0..0..0