1.\"/* Copyright 1988,1990,1993 by Paul Vixie 2.\" * All rights reserved 3.\" * 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 11.\" * user. 12.\" * 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 16.\" */ 17.\" 18.\" $FreeBSD$ 19.\" 20.Dd May 13, 2010 21.Dt CRONTAB 1 22.Os 23.Sh NAME 24.Nm crontab 25.Nd maintain crontab files for individual users (V3) 26.Sh SYNOPSIS 27.Nm 28.Op Fl u Ar user 29.Ar file 30.Nm 31.Op Fl u Ar user 32{ 33.Fl l | 34.Fl r | 35.Fl e 36} 37.Sh DESCRIPTION 38The 39.Nm 40utility is the program used to install, deinstall or list the tables 41used to drive the 42.Xr cron 8 43daemon in Vixie Cron. 44Each user can have their own crontab, and though 45these are files in 46.Pa /var , 47they are not intended to be edited directly. 48.Pp 49If the 50.Pa allow 51file exists, then you must be listed therein in order to be allowed to use 52this command. 53If the 54.Pa allow 55file does not exist but the 56.Pa deny 57file does exist, then you must 58.Em not 59be listed in the 60.Pa deny 61file in order to use this command. 62If neither of these files exists, then 63depending on site-dependent configuration parameters, only the super user 64will be allowed to use this command, or all users will be able to use this 65command. 66The format of these files is one username per line, 67with no leading or trailing whitespace. 68Lines of other formats will be ignored, 69and so can be used for comments. 70.Pp 71The first form of this command is used to install a new crontab from some 72named file or standard input if the pseudo-filename 73.Sq Fl 74is given. 75.Pp 76The following options are available: 77.Bl -tag -width indent 78.It Fl u 79Specify the name of the user whose crontab is to be 80tweaked. 81If this option is not given, 82.Nm 83examines 84.Dq your 85crontab, i.e., the crontab of the person executing the 86command. 87Note that 88.Xr su 1 89can confuse 90.Nm 91and that if you are running inside of 92.Xr su 1 93you should always use the 94.Fl u 95option for safety's sake. 96.It Fl l 97Display the current crontab on standard output. 98.It Fl r 99Remove the current crontab. 100.It Fl e 101Edit the current crontab using the editor specified by 102the 103.Ev VISUAL 104or 105.Ev EDITOR 106environment variables. 107The specified editor 108.Em must 109edit the file in place; 110any editor that unlinks the file and recreates it cannot be used. 111After you exit 112from the editor, the modified crontab will be installed automatically. 113.El 114.Sh FILES 115.Bl -tag -width /var/cron/allow -compact 116.It Pa /var/cron/allow 117List of users allowed to use crontab 118.It Pa /var/cron/deny 119List of users prohibited from using crontab 120.It Pa /var/cron/tabs 121Directory for personal crontab files 122.El 123.Sh DIAGNOSTICS 124A fairly informative usage message appears if you run it with a bad command 125line. 126.Sh SEE ALSO 127.Xr crontab 5 , 128.Xr cron 8 129.Sh STANDARDS 130The 131.Nm 132command conforms to 133.St -p1003.2 134with the exception that the dangerous variant of calling 135.Nm 136without a file name in the first form of the command is not allowed by 137this implementation. 138The pseudo-filename 139.Sq Fl 140must be specified to read from standard input. 141The new command syntax 142differs from previous versions of Vixie Cron, as well as from the classic 143SVR3 syntax. 144.Sh AUTHORS 145.An Paul Vixie Aq paul@vix.com 146