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Full Discussion: How to write a UNIX script to send a mail to the respective individual users about their groups?
Top Forums UNIX for Beginners Questions & Answers How to write a UNIX script to send a mail to the respective individual users about their groups? Post 302997816 by RudiC on Saturday 20th of May 2017 12:42:09 AM
Old 05-20-2017
Please become accustomed to provide decent context info of your problem.
It is always helpful to support a request with system info like OS and shell, related environment (variables, options), preferred tools, and adequate (representative) sample input and desired output data and the logics connecting the two, to avoid ambiguities and keep people from guessing.

On my linux system running above with bash, I receive
Code:
bash: syntax error near unexpected token `('

So - please post entire error messages to help people help you.

In (a recent) bash, your groups list could be achieved like
Code:
groups $(awk -F':' '{ print $1}' /etc/passwd)

or
Code:
groups $(cut -d: -f1 /etc/passwd)

, and your loop modified to
Code:
for user in $(cut -d: -f1 /etc/passwd); do mail -s "$subject" $user   < <(groups $user); done

might work.

A slightly different approach would reduce disk I/O activity by running groups only once:
Code:
groups $(cut -d: -f1 /etc/passwd) | while read line; do echo $line | mail -s"subject" ${line%%:*}; done

Last edited by RudiC; 05-20-2017 at 01:49 AM..
 

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LEARN ABOUT FREEBSD

conflict

CONFLICT(8)							     [nmh-1.5]							       CONFLICT(8)

NAME

       conflict - search for alias/password conflicts

SYNOPSIS

       /usr/lib/mh/conflict [-search directory] [-mail name] [-version] [-help] [aliasfiles ...]

DESCRIPTION

       Conflict is a program that checks to see if the interface between nmh and the transport system is in good shape

       Conflict also checks for maildrops in /var/mail which do not belong to a valid user.  It assumes that no user name will start with `.', and
       thus ignores files in /var/mail which begin with `.'.  It also checks for entries in the group(5) file which do not belong to a valid user,
       and for users who do not have a valid group number.  In addition duplicate users and groups are noted.

       If  the	-mail  name  switch is used, then the results will be sent to the specified name.  Otherwise, the results are sent to the standard
       output.

       The -search directory switch can be used to search directories other than /var/mail and to report  anomalies  in  those	directories.   The
       -search directory switch can appear more than one time in an invocation to conflict.

       Conflict should be run under cron(8), or whenever system accounting takes place.

FILES

       /etc/nmh/mts.conf	  nmh mts configuration file
       /etc/passwd		  List of users
       /etc/group		  List of groups
       /usr/bin/mh/mhmail	  Program to send mail
       /var/mail/		  Directory of mail drop

PROFILE COMPONENTS

       None

SEE ALSO

       mh-alias(5)

DEFAULTS

       `aliasfiles' defaults to /etc/nmh/MailAliases

CONTEXT

       None

MH.6.8								   11 June 2012 						       CONFLICT(8)
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