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(-)b/usr.sbin/cron/cron/cron.8 (-19 / +21 lines)
Lines 46-63 The Link Here
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.Nm
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.Nm
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utility searches
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utility searches
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.Pa /var/cron/tabs
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.Pa /var/cron/tabs
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for crontab files which are named after accounts in
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for user crontab files which are named after accounts in
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.Pa /etc/passwd ;
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.Pa /etc/passwd .
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crontabs found are loaded into memory.
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The
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The
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.Nm
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.Nm
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utility also searches for
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utility also searches for system crontab files in
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.Pa /etc/crontab
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.Pa /etc/crontab ,
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and files in
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.Pa /etc/cron.d ,
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.Pa /etc/cron.d
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and
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and
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.Pa /usr/local/etc/cron.d
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.Pa /usr/local/etc/cron.d .
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which are in a different format (see
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Crontabs found are loaded into memory.
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System crontab files are in a different format (see
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.Xr crontab 5 ) .
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.Xr crontab 5 ) .
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.Pp
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.Pp
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The
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The
Lines 71-79 checks the status of the account with Link Here
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.Xr pam 3
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.Xr pam 3
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and skips the command if the account is unavailable,
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and skips the command if the account is unavailable,
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e.g., locked out or expired.
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e.g., locked out or expired.
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Commands from
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Commands from system crontabs bypass this check.
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.Pa /etc/crontab
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.Pp
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bypass this check.
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When executing
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When executing
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commands, any output is mailed to the owner of the crontab (or to the user
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commands, any output is mailed to the owner of the crontab (or to the user
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named in the
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named in the
Lines 86-94 environment variable. Link Here
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Additionally,
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Additionally,
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.Nm
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.Nm
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checks each minute to see if its spool directory's modification time (or
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checks each minute to see if its spool directory's modification time (or
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the modification time on
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the modification time on any system crontab files) has changed,
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.Pa /etc/crontab )
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and if it has,
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has changed, and if it has,
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.Nm
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.Nm
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will then examine the modification time on all crontabs and reload those
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will then examine the modification time on all crontabs and reload those
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which have changed.
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which have changed.
Lines 119-128 This option can help to smooth down system load spikes during Link Here
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moments when a lot of jobs are likely to start at once, e.g.,
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moments when a lot of jobs are likely to start at once, e.g.,
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at the beginning of the first minute of each hour.
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at the beginning of the first minute of each hour.
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.It Fl J Ar rootjitter
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.It Fl J Ar rootjitter
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Enable time jitter for superuser jobs.
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Enable time jitter for superuser (user id 0) jobs.
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The same as
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The same as
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.Fl j
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.Fl j
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except that it will affect jobs run by the superuser only.
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except that it will affect jobs run by a superuser only.
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These jobs are either in the superuser's user crontab, or a
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system crontab when the
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.Em who
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field is specified as a superuser. The default is 0, which
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effectively disables root time jitter.
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.It Fl m Ar mailto
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.It Fl m Ar mailto
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Overrides the default recipient for
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Overrides the default recipient for
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.Nm
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.Nm
Lines 222-230 Directory for optional/modularized system crontab files. Link Here
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configuration file for
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configuration file for
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.Nm
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.Nm
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.It Pa /usr/local/etc/cron.d
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.It Pa /usr/local/etc/cron.d
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Directory for third-party package provided crontab files.
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Directory for third-party package provided system crontab files.
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.It Pa /var/cron/tabs
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.It Pa /var/cron/tabs
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Directory for personal crontab files
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Directory for user crontab files
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.El
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.El
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.Sh SEE ALSO
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.Sh SEE ALSO
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.Xr crontab 1 ,
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.Xr crontab 1 ,

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