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Full Discussion: Check mail periodically with tcsh
Top Forums Shell Programming and Scripting Check mail periodically with tcsh Post 302424953 by kermit on Wednesday 26th of May 2010 05:33:46 PM
Old 05-26-2010
Check mail periodically with tcsh
A friend of mine is switching his email from one University server to a different one. He is using the tcsh, and on his current server, the shell will tell him (when the prompt is displayed) if there is new mail. The new server, where he also has the tcsh, does not do this by default. I got him to do this:

Code:
alias precmd "if ( -e $MAIL ) if ( ! ( -z $MAIL ) ) echo You have mail."

where $MAIL expands to /var/mail/my-friends-login-name

He poked around, and that is indeed where his mail is stored. The alias is in his .aliases file. It (the alias) seems to be working, but there is a problem. The string "You have mail." is getting echoed every time the prompt is printed, as if he had new mail all the time, except that he doesn't. So I guess the if statement I told him to use is not correct. I am by no means a tcsh guy, so I am not sure of what I am missing here.
 

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LEARN ABOUT DEBIAN

pam_mail

PAM_MAIL(8)							 Linux-PAM Manual						       PAM_MAIL(8)

NAME

       pam_mail - Inform about available mail

SYNOPSIS

       pam_mail.so [close] [debug] [dir=maildir] [empty] [hash=count] [noenv] [nopen] [quiet] [standard]

DESCRIPTION

       The pam_mail PAM module provides the "you have new mail" service to the user. It can be plugged into any application that has credential or
       session hooks. It gives a single message indicating the newness of any mail it finds in the user's mail folder. This module also sets the
       PAM environment variable, MAIL, to the user's mail directory.

       If the mail spool file (be it /var/mail/$USER or a pathname given with the dir= parameter) is a directory then pam_mail assumes it is in
       the Maildir format.

OPTIONS

       close
	   Indicate if the user has any mail also on logout.

       debug
	   Print debug information.

       dir=maildir
	   Look for the users' mail in an alternative location defined by maildir/<login>. The default location for mail is /var/mail/<login>.
	   Note, if the supplied maildir is prefixed by a '~', the directory is interpreted as indicating a file in the user's home directory.

       empty
	   Also print message if user has no mail.

       hash=count
	   Mail directory hash depth. For example, a hashcount of 2 would make the mail file be /var/spool/mail/u/s/user.

       noenv
	   Do not set the MAIL environment variable.

       nopen
	   Don't print any mail information on login. This flag is useful to get the MAIL environment variable set, but to not display any
	   information about it.

       quiet
	   Only report when there is new mail.

       standard
	   Old style "You have..." format which doesn't show the mail spool being used. This also implies "empty".

MODULE TYPES PROVIDED

       The session and auth (on establishment and deletion of credentials) module types are provided.

RETURN VALUES

       PAM_BUF_ERR
	   Memory buffer error.

       PAM_SERVICE_ERR
	   Badly formed arguments.

       PAM_SUCCESS
	   Success.

       PAM_USER_UNKNOWN
	   User not known.

EXAMPLES

       Add the following line to /etc/pam.d/login to indicate that the user has new mail when they login to the system.

	   session  optional  pam_mail.so standard

SEE ALSO

       pam.conf(5), pam.d(5), pam(7)

AUTHOR

       pam_mail was written by Andrew G. Morgan <morgan@kernel.org>.

Linux-PAM Manual						    06/04/2011							       PAM_MAIL(8)
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