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Operating Systems OS X (Apple) command to check presence of volume Post 302437376 by kevinmmac on Wednesday 14th of July 2010 10:24:11 PM
Old 07-14-2010
command to check presence of volume

Hi:

I'm not really a programmer, but I've created a small logout hook script to copy some specific directories to a server volume when a user logs out (10.6.4). These is a laptop user, so I'm looking find:

1) the command to check if the volume (including path to directory?) is available.

2) the command to stop end the script if the volume/path is not available, but continue with my cp commands if the volume/path is present.

3) do logout hooks run only after all user-launched applications have fully quit? If not, what would be the command(s) to make sure all the apps quit before the script continues? Naturally, I want to be sure the copy commands run only if all the user's apps have quit so there are no open documents.

I've already created an Automator script to do what I want, but can't locate the info on how to make it run during the logout process. I'm more of a GUI person, so if someone knows how to do this, that would be a good answer for me.


Thanks!
 

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pmvarrun(8)							     pam_mount							       pmvarrun(8)

Name
       pmvarrun - updates /var/run/pam_mount/user

Syntax
       pmvarrun -u user [options]

Description
       A  separate  program is needed so that /var/run/pam_mount/user may be created with a pam_mount-specific security context (otherwise SELinux
       policy will conflict with gdm, which also creates file in /var/run).

       pmvarrun is flexible and can run in a number of different security setups:

   root-root
       When pmvarrun is invoked as root, /var/run/pam_mount's permission settings can be as strict as needed; usually (0755,root,root) is  a  good
       pick  as  it  gives  users the debug control over their refcount. Refcount files are given their respective owners (chowned to the user who
       logs in).

   user-user
       When invoked as the user who logs in, /var/run/pam_mount needs appropriate permissions to create a file, which means the write bit must	be
       set. It is also highly suggested to set the sticky bit in this case, so other users do not tamper with your refcount.

   root-user
       Some  programs or login helpers incorrectly call the PAM stack in a way that the login phase is done as root and the logout phase as a nor-
       mal user.  Nevertheless, pmvarrun supports this, and the same permissions as in root-root can be used. While the user may not  be  able	to
       unlink his file from /var/run/pam_mount, it will be truncated to indicate the same state.

Options
       --help, -h
	      Display help.

       --user user, -u user
	      User to handle, must be a valid username.

       --operation number, -o number
	      Increase volume count by number.

       -d     Turn on debugging.

Files
       /var/run/pam_mount/user

Author
       This  manpage  was originally written by Bastian Kleineidam <calvin@debian.org> for the Debian distribution of libpam-mount but may be used
       by others.

       See /usr/share/doc/packages/pam_mount/AUTHORS for the list of original authors of pam_mount.

pam_mount							    2008-10-08							       pmvarrun(8)
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