Differential D23597 Diff 68161 usr.sbin/cron/crontab/crontab.5

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usr.sbin/cron/crontab/crontab.5

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	.Pp			.Pp
	Several environment variables are set up			Several environment variables are set up
	automatically by the			automatically by the
	.Xr cron 8			.Xr cron 8
	daemon.			daemon.
	.Ev SHELL			.Ev SHELL
	is set to			is set to
	.Pa /bin/sh ,			.Pa /bin/sh ,
	.Ev PATH
	is set to
	.Pa /sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin ,
	and			and
	.Ev LOGNAME			.Ev LOGNAME
	and			and
	.Ev HOME			.Ev HOME
	are set from the			are set from the
	.Pa /etc/passwd			.Pa /etc/passwd
	line of the crontab's owner.			line of the crontab's owner.
	In addition, the environment variables of the			In addition, the environment variables of the
	user's login class, with the exception of			user's login class will be set from
	.Ev PATH ,
	will be set from
	.Pa /etc/login.conf.db			.Pa /etc/login.conf.db
	and			and
	.Pa ~/.login_conf .			.Pa ~/.login_conf .
				(A setting of
				.Ev HOME
				in the login class will override the value from
				.Pa /etc/passwd ,
				but will not change the current directory when the command is
				invoked, which can only be overridden with an explicit setting of
				.Ev HOME
				within the crontab file itself.)
				If
				.Ev PATH
				is not set by any other means, it is defaulted to
				.Pa /sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin .
	.Ev HOME ,			.Ev HOME ,
	.Ev PATH			.Ev PATH
	and			and
	.Ev SHELL ,			.Ev SHELL ,
	and any variables set from the login class,			and any variables set from the login class,
	may be overridden by settings in the crontab;			may be overridden by settings in the crontab;
	.Ev LOGNAME			.Ev LOGNAME
	may not.			may not.
	.Pp			.Pp
	(Another note: the			(Another note: the
	.Ev LOGNAME			.Ev LOGNAME
	variable is sometimes called			variable is sometimes called
	.Ev USER			.Ev USER
	on			on
	.Bx			.Bx
	systems...			systems...
	On these systems,			On these systems,
	.Ev USER			.Ev USER
	will be set also).			will be set also).
	.Pp			.Pp
	In addition to			If
	.Ev LOGNAME ,
	.Ev HOME ,
	.Ev PATH ,
	and
	.Ev SHELL ,
	.Xr cron 8			.Xr cron 8
	will look at			has any reason to send mail as a result of running commands in
	.Ev MAILTO			``this'' crontab, it will respect the following settings which may be
	if it has any reason to send mail as a result of running			defined in the crontab (but which are not taken from the login class).
	commands in ``this'' crontab.
	If			If
	.Ev MAILTO			.Ev MAILTO
	is defined (and non-empty), mail is			is defined (and non-empty), mail is
	sent to the user so named.			sent to the user so named.
	If			If
	.Ev MAILFROM			.Ev MAILFROM
	is defined (and non-empty), its value will be used as the from address.			is defined (and non-empty), its value will be used as the from address.
	.Ev MAILTO			.Ev MAILTO
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