crontab+mplayer alarm clock Post: 302682163

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Top Forums Shell Programming and Scripting crontab+mplayer alarm clock Post 302682163 by Corona688 on Sunday 5th of August 2012 05:11:45 PM

08-05-2012

Registered User

I don't think you can specify variables in cron like that. You can only specify a few things like SHELL.

Also, what's your window manager? GNOME virally hijacks your file permissions via hooks in PAMD and other things, to control who gets permissions to use devices depending on your graphical login. Ergo you may not have permissions to access your sound device until you do a login, no matter what file permissions your sound devices are set to or what groups you belong to. (Or be given permissions without the proper groups or access, for that matter!)

Also, DISPLAY is not needed to play music. Specify -vo null so mplayer doesn't try to open one anyway and die when it can't get into your X context.

Last edited by Corona688; 08-05-2012 at 06:22 PM..

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LEARN ABOUT PLAN9

logindevperm

logindevperm(4) 						   File Formats 						   logindevperm(4)

NAME

       logindevperm, fbtab - login-based device permissions

SYNOPSIS

       /etc/logindevperm

DESCRIPTION

       The  /etc/logindevperm  file  contains  information  that is used by login(1) and ttymon(1M) to change the owner, group, and permissions of
       devices upon logging into or out of a console device. By default, this file contains lines for the keyboard, mouse, audio, and frame buffer
       devices.

       The owner of the devices listed in /etc/logindevperm is set to the owner of the console by login(1). The group of the devices is set to the
       owner's group specified in /etc/passwd. The permissions are set as specified in /etc/logindevperm.

       Fields are separated by TAB and/or SPACE characters. Blank lines and comments can appear anywhere in the file; comments start with a  hash-
       mark, ` # ', and continue to the end of the line.

       The first field specifies the name of a console device (for example, /dev/console). The second field specifies the permissions to which the
       devices in the device_list field (third field) will be set.  These permissions must be expressed in octal format.  For  example,  O774.	 A
       device_list  is	a  colon-separated list of device names.  Note that a device name must be a /dev link.	A device entry that is a directory
       name and ends with "/*" specifies all entries in the directory (except "." and ".."). For example, "/dev/fbs/*" specifies all frame  buffer
       devices.

       Once the devices are owned by the user, their permissions and ownership can be changed using chmod(1) and chown(1), as with any other user-
       owned file.

       Upon logout the owner and group of these devices will be reset by ttymon(1M) to owner root and root's group  as	specified  in  /etc/passwd
       (typically other). The permissions are set as specified in the /etc/logindevperm file.

FILES

       /etc/passwd     File that contains user group information.

SEE ALSO

       chmod(1), chown(1), login(1), ttymon(1M), passwd(4)

NOTES

       /etc/logindevperm provides a superset of the functionality provided by /etc/fbtab in SunOS 4.x releases.

SunOS 5.10							    22 Oct 2003 						   logindevperm(4)