ezmlm-cron - Sets up digest request messages generation
ezmlm-cron [ -cCdDlL ][ -w dow ][ -t hh:mm ][ -i hrs ]
ezmlm-cron is a very restrictive interface to crond(8).
It edits the effective user's ~/crontab (see crontab(5))
file. It then executes crontab(1) to update crond(8) with
ezmlm-cron sets up the generation of trigger messages to
the list listadr and the digest code code. A optional
digest format specifier f can be added to code.
ezmlm-cron reads dir/ezcronrc, where dir is the home
directory of the effective user. The first line of this
file is the host name, 'host', to which bounces should be
sent. Any bounces for lists set up by 'user' will go to
'user@host'. Subsequent lines are entries for users made
up of: user:local:host:num:[list1[,list2...]]. The
':'-separated parameters are:
user the user name to which this line corresponds.
local the list address must start with exactly these
characters (case sensitive). If this field is
empty, any list local address is allowed.
host the list host name must exactly match this parame-
ter (case insensitive). If this field is empty,
any list host address is allowed. (Host names for
the list and the digest list must still match.)
num the user is permitted a maximum of num entries.
a set of complete list names separated by commas.
The user may edit entries for these lists, even if
they do not match the criteria set above. If these
lists exist, they are counted in determining num.
No while space is allowed before or between list
names. If no list names are specified, the final
':' can be omitted.
The first line matching the executing user will be
If ezmlm-cron is installed SUID euser, the configu-
ration and crontab files from that user's home
directory will be used for all ezmlm-cron actions.
This way, users on a system can be given limited
crond(8) access via ezmlm-cron restricted by
dir/ezcronrc and to the generation of digest trig-
ger messages. This is especially useful for users
without shell access or access to crond(8). euser
is usually 'ezmlm'. To install ezmlm-cron SUID
# chown ezmlm /usr/local/bin/ezmlm/ezmlm-cron
# chmod 4555 /usr/local/bin/ezmlm/ezmlm-cron
ezmlm-cron refuses to run if installed SUID root.
ezmlm-cron when executed by 'root', will still use
the files in ~root.
To allow crond(8) access, you may need to list the
effective user (all users allowed access or ~ezmlm
if ezmlm-cron is installed SUID ezmlm) in
/etc/cron.allow. See crontab(1) for further infor-
The -c, -d, and -l switches are mutually exclusive.
-c List user entry from ezcronrc.
-C (Default.) Do not list user entry.
-d Delete entry. ezmlm-cron will search
~euser/crontab for an entry belonging to the exe-
cuting user, permitted by ~euser/ezcronrc and
matching the command line arguments supplied. code
is ignored and may be omitted.
-D (Default.) Do not delete entry.
-i hrs Generate trigger message with hrs hours interval.
Accepted intervals are 0, 1 ,2, 3, 6, 12, 24, 48,
and 72 hours. Other numbers will be silently
adjusted upwards to the nearest accepted interval
(intervals above 72 hours will result in weekly
-l List entries. If no other command line arguments
are given, ezmlm-cron lists the entries created in
the name of the user. If listadr is given, ezmlm-
cron will list the entries for all the matching
lists, even if the entries were not set up by the
current user. Arguments, if given, still have to
comply with the rules set in ezcronrc.
Crude crontab(5) lines are listed. These are taken
from the ~/crontab file. Usually, these are active
entries, although if the last execution of
crontab(1) failed, they may not be.
-L (Default.) Do not list entry.
The time for the trigger message. Other trigger
messages will be sent hrs hours before and after
-w dow The days of the week on which trigger messages are
sent. day 0 and 7 are Sunday, 1 is Monday, etc (see
crontab(5)). The string specified for dow must con-
sists of single comma-separated digits in the range
'0'-'7' only. The default is every day, except for
hrs of 48 (default Monday, Wednesday, Friday), 72
(default Monday and Thursday), or greater than 72
(default Monday). Both hrs and dow can be speci-
fied. In this case, trigger messages are sent on
the day specified by dow at the interval specified
by hrs. If hrs is greater than 24 h, it is ignored
and trigger messages are generated daily or as
specified by dow.
The configuration file for ezmlm-cron. euser is
the effective user id. This is the executing user,
unless ezmlm-cron is installed SUID otheruser, in
which case it is otheruser.
The file edited by ezmlm-cron. euser is the effec-
The lock file used to assure that only one process
at a time is editing the crond(8) settings. euser
is the effective user.
ezmlm-cron should use the output of 'crontab -l' to list
crontab lines, rather than parse the crontab file (and
assume that the last execution of crontab(1) was success-
crond(8), crontab(1), crontab(5), ezmlm(5), ezmlm-get(1)
© 1994 Man-cgi 1.15, Panagiotis Christias <email@example.com>