daemon: Add -C (--restart-count) option

Add a new option (-C, --restart-count) to specify the maximum
number of times that the controlled process is restarted if
restart (-r) is restarted.

Reviewed

daemon: Add -C (--restart-count) option

Add a new option (-C, --restart-count) to specify the maximum
number of times that the controlled process is restarted if
restart (-r) is restarted.

Reviewed by: kevans
Differential Revision: https://reviews.freebsd.org/D44944

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daemon: fix clang-tidy warnings

Fixed narrowing conversions:
- strtol replaced with strtonum with range check
- read returns ssize_t
- kevent.data explicitly cast to int before passing into strerror

daemon: fix clang-tidy warnings

Fixed narrowing conversions:
- strtol replaced with strtonum with range check
- read returns ssize_t
- kevent.data explicitly cast to int before passing into strerror

While we we're here:
- Defined and documented maximum restart delay.
- Fixed typo in a comment.
- Remove unused includes

Reviewed by: cperciva, kevans

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daemon.8: Document -u sets HOME, USER, and SHELL

Fixes: 6b3ad1d73732 When -u option is used also set USER, HOME and SHELL
MFC after: 3 days

daemon.8: Sort options in DESCRIPTION

MFC after: 3 days

daemon.8: Use Cm where appropriate

MFC after: 3 days

daemon.8: Use Dv for signal names

MFC after: 3 days

Remove $FreeBSD$: two-line nroff pattern

Remove /^\.\\"\n\.\\"\s*\$FreeBSD\$$\n/

daemon: add long_opts

Long options improve readability of scripts, makes code comprehension
easier. This patch adds long options while preserving the existing CLI
interface.

Also --help/-h option

daemon: add long_opts

Long options improve readability of scripts, makes code comprehension
easier. This patch adds long options while preserving the existing CLI
interface.

Also --help/-h option is added.

Reviewed by: allanjude, pauamma (both earlier versions), kevans
Differential Revision: https://reviews.freebsd.org/D38244

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Fix a typo

"and" is not a flag.

MFC after: 3 days

Fix a typo in the 366098.

Reported by: 0mp
MFC after: 2 weeks
(along with 366098)

dd a new option (-H) to daemon(8) to catch SIGHUP and re-open output_file file when
received.

The default system log rotation mechanism (newsyslog(8)) requires ability to send
signal to a daemon in

dd a new option (-H) to daemon(8) to catch SIGHUP and re-open output_file file when
received.

The default system log rotation mechanism (newsyslog(8)) requires ability to send
signal to a daemon in order to properly complete rotation of the logs in an "atomic"
manner without having to making a copy and truncating original file. Unfortunately
our built-in mechanism to convert "dumb" programs into daemons has no way to handle
this rotation properly. This change adds this ability, to be enabled by supplying -H
option in addition to the -o option.

Reviewed by: markj, rpokala (manpages)
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D26526

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Merge ^/head r352764 through r353315.

Bump .Dd for earlier update (should have been part of r353024).

Clarify how the -f option for daemon(8) interacts with other options
related to redirecting stdout and stderr.

MFHead@r345677

Correct contradictory information on default syslog logging priority.

MFC after: 1 week

Merge ^/head r340235 through r340367.

Cross-reference nohup(1) and daemon(8).

Reviewed by: bcr
Approved by: krion (mentor, implicit), mat (mentor, implicit)
Differential Revision: https://reviews.freebsd.org/D17920

MFH @ r337607, in preparation for boarding

Merge ^/head r336870 through r337285, and resolve conflicts.

Add a missing "Ar" macro to the description of the -R flag in the manpage.

Approved by: bjk (doc committer), krion (mentor)
Differential Revision: https://reviews.freebsd.org/D16520

Fix cut-and-pasted line to have the right option letter.

Reported by: 0mp@
Pointy hat: ian@

Add an option to daemon(8) to specify a delay between restarts of a
supervised program. The existing -r option has a hard-coded delay of one
second. This change adds a -R option which takes a delay

Add an option to daemon(8) to specify a delay between restarts of a
supervised program. The existing -r option has a hard-coded delay of one
second. This change adds a -R option which takes a delay in seconds. This
can be used to prevent log spam and rapid restarts, similar to init(8)'s
behavior of adding a delay between rapid restarts when it's supervising a
program.

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o A command line flag for the syslog_facility fixed in the SYNOPSIS.

PR: 225441

Merge ^/head r307736 through r308146.