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Full Discussion: bash script to check if mounted, and mount if not
Top Forums Shell Programming and Scripting bash script to check if mounted, and mount if not Post 302293696 by unSpawn on Tuesday 3rd of March 2009 04:07:39 PM
Old 03-03-2009
Quote:
Originally Posted by graysky
1) Check to see if the mount is active
For this you could use 'grep'. But not for output, just the exit value (meaing "$?"). Check /proc/mounts. Mount a directory. Check /proc/mounts again. Try to grep the mounted partition line from /proc/mounts.


Quote:
Originally Posted by graysky
2) If it's not active, try to mount it
You know the mount command, right? So if the previous 'grep' fails you could use the exit value as cue to mount it. To test the mount bit you could use a command that always outputs exit value 1: 'false'. Test it with 'false || echo doSomething; false && echo doSomethingElse'. You'll see.


Quote:
Originally Posted by graysky
3) If it won't mount because the nfs server is down, wait 45 s then try again looping indefinitely until the nfs server is up
"Wait" here means 'sleep'. Try 'man sleep' to find out how to use it. Again you can use a "negative" (in shell) exit value.


Quote:
Originally Posted by graysky
4) Once the mount is active, run a program and exit
Same here: use the exit value.

Here's some Bash scripting guides that will help you glue those things together if you like: BASH Programming - Introduction HOW-TO, Bash Guide for Beginners,
Advanced Bash-Scripting Guide.

Once you have something to test out, posting it in code tags would make things easier in case things went awry somewhere.
 

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LEARN ABOUT SUSE

mkill

MKILL(8)						       The SuSE boot concept							  MKILL(8)

MKILL

       Mkill - Send processes making a active mount point busy a signal

SYNOPSIS

       mkill [-SIG] [-u] /mnt1 [/mnt2...]
       mkill [-l]

DESCRIPTION

       mkill  determines  all  active  mount points from /proc/mounts and compares this with the specified mount points. Then mkill seeks for pro-
       cesses making this mount points busy. For this search only the links found in /proc/<pid>/ are used to avoid hangs  on  files  provided	by
       network	file  systems  like nfs(5).  The default signal is SIGTERM for termination. If a mount point is not active, that is that it is not
       found in /proc/mounts, mkill will do exactly nothing.

OPTIONS

       -<SIG> Signals  can be specified either by name (e.g. -HUP, -SIGHUP) or by number (e.g. -1).

       -0     The special signal 0 force mkill to list all processes making the specified mount point busy.

       -u     Perform a lazy umount on the specified mount points before sending the signal SIGTERM or SIGKILL.

       -l     List all known signals.

EXAMPLES

       mkill -TERM /var

       This will terminate all processes accessing a seperate /var partition.

       mkill -HUP /dev/pts

       All processes using a pseudo-terminal slave will hangup.

RETURN VALUE

       Always success which is that zero is returned.

SEE ALSO

       fuser(1), proc(5), umount(8).

COPYRIGHT

       2008 Werner Fink, 2008 SUSE LINUX Products GmbH, Germany.

AUTHOR

       Werner Fink <werner@suse.de>

3rd Berkeley Distribution					   Jan 31, 2008 							  MKILL(8)
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