scripting question (using if)

L1nuxn00b703 · 04-19-2014, 08:26 AM

hello,

I have the following script to check if drives exist.

Code:

#!/bin/bash

SDB=/dev/sdb
SDC=/dev/sdc
SDD=/dev/sdd
SDE=/dev/sde
SDF=/dev/sdf

if [ -b $SDB ]; then
  echo "$SDB  drive present.  continuing."
else
  exit 1
fi

if [ -b $SDC ]; then
  echo "$SDC  drive present.  continuing."
else
  exit 1
fi

if [ -b $SDD ]; then
  echo "$SDD  drive present.  continuing."
else
  exit 1
fi

if [ -b $SDE ]; then
  echo "$SDE  drive present.  continuing."
else
  exit 1
fi

if [ -b $SDF ]; then
  echo "$SDF  drive present.  continuing."
else
  exit 1
fi

Is there a better method (one or two liner) that would do the same thing instead of using multiple if statements?

Thanks,

jlinkels · 04-19-2014, 09:07 AM

This is untested, so you might have to adapt it.

Code:

for td in b c d e f
do
  if [ -b /dev/sd${td} ]; then
    echo "/dev/sd${td}  drive present.  continuing."
  else
    exit 1
  fi
done

jlinkels