1 .\"/* Copyright 1988,1990,1993 by Paul Vixie
2 .\" * All rights reserved
4 .\" * Distribute freely, except: don't remove my name from the source or
5 .\" * documentation (don't take credit for my work), mark your changes (don't
6 .\" * get me blamed for your possible bugs), don't alter or remove this
7 .\" * notice. May be sold if buildable source is provided to buyer. No
8 .\" * warrantee of any kind, express or implied, is included with this
9 .\" * software; use at your own risk, responsibility for damages (if any) to
10 .\" * anyone resulting from the use of this software rests entirely with the
13 .\" * Send bug reports, bug fixes, enhancements, requests, flames, etc., and
14 .\" * I'll try to keep a version up to date. I can be reached as follows:
15 .\" * Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul
25 .Nd maintain crontab files for individual users (V3)
40 utility is the program used to install, deinstall or list the tables
44 Each user can have their own crontab, and though
47 they are not intended to be edited directly.
51 file exists, then you must be listed therein in order to be allowed to use
55 file does not exist but the
57 file does exist, then you must
61 file in order to use this command.
62 If neither of these files exists, then
63 depending on site-dependent configuration parameters, only the super user
64 will be allowed to use this command, or all users will be able to use this
66 The format of these files is one username per line,
67 with no leading or trailing whitespace.
68 Lines of other formats will be ignored,
69 and so can be used for comments.
71 The first form of this command is used to install a new crontab from some
72 named file or standard input if the pseudo-filename
76 The following options are available:
77 .Bl -tag -width indent
79 Specify the name of the user whose crontab is to be
81 If this option is not given,
85 crontab, i.e., the crontab of the person executing the
91 and that if you are running inside of
93 you should always use the
95 option for safety's sake.
97 Display the current crontab on standard output.
99 Remove the current crontab.
101 Edit the current crontab using the editor specified by
106 environment variables.
109 edit the file in place;
110 any editor that unlinks the file and recreates it cannot be used.
112 from the editor, the modified crontab will be installed automatically.
115 .Bl -tag -width /var/cron/allow -compact
116 .It Pa /var/cron/allow
117 .It Pa /var/cron/deny
120 A fairly informative usage message appears if you run it with a bad command
130 with the exception that the dangerous variant of calling
132 without a file name in the first form of the command is not allowed by
136 must be specified to read from standard input.
137 The new command syntax
138 differs from previous versions of Vixie Cron, as well as from the classic
141 .An Paul Vixie Aq paul@vix.com