Simple script to test mountGpoint for read-write Post: 302991985

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Top Forums Shell Programming and Scripting Simple script to test mountGpoint for read-write Post 302991985 by drysdalk on Monday 20th of February 2017 10:24:33 AM

02-20-2017

Registered User

Hi,

A script like this set up on ServerA should do the trick.

Code:

#!/bin/bash
date=`/bin/date +%Y%m%d%H%M%S`

email_to="unixforum@localhost"
email_subject="Something went wrong"
email_body="Uh-oh"

server="localhost"

if ! /usr/bin/ssh "$server" "/usr/bin/touch /mnt/testfile.$date" >/dev/null 2>/dev/null
then
        echo "$email_body" | /usr/bin/mail -s "$email_subject" "$email_to"
        exit 1
fi

exit 0

The 'date' variable at the top just creates a string via the 'date' command that consists of the year, month, date, hour, minute and second all run together. I went with this since you didn't specify any particular format, but this should do for most purposes (if the script only runs at most once per second, anyway).

The next three variables define the recipient, subject and body of the e-mail message. You can customise those all you like.

Finally, the variable 'server' defines the remote server that the 'ssh' command will use to connect to. You'll want to change this to the details of whatever ServerB is.

The basic idea of the script is that it connects to the remote server, and if the 'touch' command (or the 'ssh' command itself) returns a non-successful exit value for any reaason, it then proceeds to send the e-mail.

Here's an example session of it running, in a situation where the touch command at the remote end (which is really just 'localhost' in my test case) fails.

Code:

$ whoami
unixforum
$ ./script.sh 
$ mail
"/var/mail/unixforum": 1 message 1 new
>N   1 unixforum@localhost Mon Feb 20 15:17  15/654   Something went wrong
? 1
<e-mail headers appear here, redacted>

Uh-oh
? d 1
? q
Held 0 messages in /var/mail/unixforum
$

Hope this helps.

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LEARN ABOUT PLAN9

newuser

NEWUSER(8)						      System Manager's Manual							NEWUSER(8)

NAME

       newuser - adding a new user

SYNOPSIS

       rc /sys/lib/newuser

DESCRIPTION

       To  establish a new user on Plan 9, add the user's name to /adm/users by running the newuser command on the console of the file server (see
       users(6) and fs(8)).  Next, give the user a password using the changeuser  command  on  the  console  of  the  authentication  server  (see
       auth(8)).   At this point, the user can bootstrap a terminal using the new name and password.  The terminal will only get as far as running
       rc, however, as no profile exists for the user.

       The rc(1) script /sys/lib/newuser sets up a sensible environment for a new user of Plan 9.  Once the terminal is running rc, type

	      rc /sys/lib/newuser

       to build the necessary directories in /usr/$user and create a reasonable initial profile in /usr/$user/lib/profile.  The script	then  runs
       the  profile  which,  as  its last step, brings up 81/2(1).  At this point the user's environment is established and running.  (There is no
       need to reboot.)  It may be prudent at this point to run passwd(1) to change the password, depending on how the initial password  was  cho-
       sen.

       The profile built by /sys/lib/newuser looks like this:

	      bind -a $home/bin/rc /bin
	      bind -a $home/bin/$cputype /bin
	      font = /lib/font/bit/pelm/euro.9.font
	      switch($service){
	      case terminal
		   prompt=('term% ' '  ')
		   fn term%{ $* }
		   exec 81/2
	      case cpu
		   bind -b /mnt/term/mnt/81/2 /dev
		   prompt=('cpu% ' '   ')
		   echo -n $sysname > /dev/label
		   fn cpu%{ $* }
		   news
	      case con
		   prompt=('cpu% ' '   ')
		   news
	      }

       Sites may make changes to /sys/lib/newuser that reflect the properties of the local environment.

       Use the -c option of mail(1) to create a mailbox.

SEE ALSO

       passwd(1), 81/2(1), namespace(4), users(6), auth(8), fs(8)

																	NEWUSER(8)