check if file is empty Post: 302128403

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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)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

How to check for empty file in Perl?

Discussion started by: deepakwins

2. UNIX for Dummies Questions & Answers

How to check if a file is empty?

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3. UNIX for Dummies Questions & Answers

to check if file is empty or not and return a non zero value

Discussion started by: mavesum

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Need to check for empty file in C shell script

Discussion started by: jclanc8