Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.debian.user > #188319

bash usage.

Show all headers | View raw

PROBLEM
Given a storage device, /dev/GRN, and mount point, /home/peter/testdir/, 
determine in a shell script whether /dev/GRN is mounted or something is 
mounted on /home/peter/testdir/.

ATTEMPTED SOLUTION
Create testdir and execute this script.

#!/bin/bash
# Demonstrate use of "mountpoint" in a script to determine 
# whether a directory has a device mounted on it.
#
WorkingDirectory=/home/peter/testdir
if [ mountpoint $WorkingDirectory ]
  then
    echo A volume is mounted on $WorkingDirectory.
else
    echo Nothing mounted on $WorkingDirectory.
fi

This is my result.
$ ./testscript
./testscript: line 6: [: mountpoint: unary operator expected
Nothing mounted on /home/peter/testdir.

According to 'man mountpoint', it returns 0 if something is mounted.  
So why the complaint from 
  if [ mountpoint $WorkingDirectory ] ?
  
Thanks,             ... Peter E.


-- 

123456789 123456789 123456789 123456789 123456789 123456789 123456789
Tel: +1 360 639 0202                      Pender Is.: +1 250 629 3757
http://easthope.ca/Peter.html              Bcc: peter at easthope. ca

Back to linux.debian.user | Previous | Next — Next in thread | Find similar | Unroll thread

Thread

bash usage. peter@easthope.ca - 2017-10-26 03:20 +0200
  Re: bash usage. Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 03:30 +0200
  Re: bash usage. Kushal Kumaran <kushal@locationd.net> - 2017-10-26 03:40 +0200
  Re: bash usage. David Margerison <deltam@electrosonics.com.au> - 2017-10-26 08:20 +0200
    Re: bash usage. Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 13:10 +0200
      Re: bash usage. David Margerison <deltam@electrosonics.com.au> - 2017-10-26 14:40 +0200
        Re: bash usage. Roberto C. Sánchez <roberto@debian.org> - 2017-10-26 14:40 +0200
        Re: bash usage. Jude DaShiell <jdashiel@panix.com> - 2017-10-27 00:10 +0200
    Unidentified subject! peter@easthope.ca - 2017-11-04 19:40 +0100

csiph-web