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25e9ca2b19
program to read any file which is a valid crontab file. The fix is based on that used in NetBSD and OpenBSD - we keep the file open while the user is editing it. This means that files must be edited in place. Cron attempts to warn you if your editor does not do this. The fact that the file must be edited in place is also noted in the man page. This patch has been confirmed to work by atleast one person on -security and has been tested locally. Obtained from: OpenBSD
121 lines
3.1 KiB
Groff
121 lines
3.1 KiB
Groff
.\"/* Copyright 1988,1990,1993 by Paul Vixie
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.\" * All rights reserved
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.\" *
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.\" * Distribute freely, except: don't remove my name from the source or
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.\" * documentation (don't take credit for my work), mark your changes (don't
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.\" * get me blamed for your possible bugs), don't alter or remove this
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.\" * notice. May be sold if buildable source is provided to buyer. No
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.\" * warrantee of any kind, express or implied, is included with this
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.\" * software; use at your own risk, responsibility for damages (if any) to
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.\" * anyone resulting from the use of this software rests entirely with the
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.\" * user.
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.\" *
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.\" * Send bug reports, bug fixes, enhancements, requests, flames, etc., and
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.\" * I'll try to keep a version up to date. I can be reached as follows:
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.\" * Paul Vixie <paul@vix.com> uunet!decwrl!vixie!paul
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.\" */
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 29, 1993
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.Dt CRONTAB 1
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.Os
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.Sh NAME
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.Nm crontab
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.Nd maintain crontab files for individual users (V3)
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.Sh SYNOPSIS
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.Nm crontab
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.Op Fl u Ar user
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.Ar file
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.Nm crontab
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.Op Fl u Ar user
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{
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.Fl l |
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.Fl r |
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.Fl e
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}
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.Sh DESCRIPTION
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.Nm Crontab
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is the program used to install, deinstall or list the tables
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used to drive the
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.Xr cron 8
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daemon in Vixie Cron. Each user can have their own crontab, and though
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these are files in
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.Pa /var ,
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they are not intended to be edited directly.
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.Pp
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If the
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.Pa allow
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file exists, then you must be listed therein in order to be allowed to use
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this command. If the
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.Pa allow
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file does not exist but the
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.Pa deny
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file does exist, then you must
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.Em not
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be listed in the
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.Pa deny
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file in order to use this command. If neither of these files exists, then
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depending on site-dependent configuration parameters, only the super user
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will be allowed to use this command, or all users will be able to use this
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command.
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.Pp
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The first form of this command is used to install a new crontab from some
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named file or standard input if the pseudo-filename ``-'' is given.
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.Pp
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The following options are available:
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.Bl -tag -width indent
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.It Fl u
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Specify the name of the user whose crontab is to be
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tweaked. If this option is not given,
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.Nm
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examines "your" crontab, i.e., the crontab of the person executing the
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command. Note that
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.Xr su 1
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can confuse
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.Nm
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and that if you are running inside of
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.Xr su 1
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you should always use the
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.Fl u
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option for safety's sake.
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.It Fl l
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Display the current crontab on standard output.
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.It Fl r
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Remove the current crontab.
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.It Fl e
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Edit the current crontab using the editor specified by
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the
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.Ev VISUAL
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or
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.Ev EDITOR
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environment variables.
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The specified editor
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.Em must
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edit the file in place;
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any editor that unlinks the file and recreates it cannot be used.
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After you exit
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from the editor, the modified crontab will be installed automatically.
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.El
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.Sh SEE ALSO
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.Xr crontab 5 ,
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.Xr cron 8
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.Sh FILES
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.Bl -tag -width /var/cron/allow -compact
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.It Pa /var/cron/allow
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.It Pa /var/cron/deny
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.El
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.Sh STANDARDS
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The
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.Nm
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command conforms to
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.St -p1003.2 .
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This new command syntax
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differs from previous versions of Vixie Cron, as well as from the classic
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SVR3 syntax.
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.Sh DIAGNOSTICS
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A fairly informative usage message appears if you run it with a bad command
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line.
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.Sh AUTHORS
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.An Paul Vixie Aq paul@vix.com
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