services: agetty: Add agetty instance to base services. Make its tty optional.
* gnu/services/base.scm (%base-services): Instantiate agetty-service. (default-serial-port): New variable. (agetty-shepherd-service): Make tty optional, default to the above. * doc/guix.texi (agetty-configuration): Update "tty" documentation. * gnu/system/install.scm (agetty-default-service): Delete variable. (embedded-installation-os): Remove agetty-default-service instance. Add "console" kernel-argument.
This commit is contained in:
Danny Milosavljevic
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2b870303e7
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5a9902c8ac
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@ -9724,7 +9724,20 @@ man page for more information.
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@item @code{tty}
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The name of the console this agetty runs on, as a string---e.g.,
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@code{"ttyS0"}. This argument is mandatory.
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@code{"ttyS0"}. This argument is optional, it will default to
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a reasonable default serial port used by the kernel Linux.
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For this, if there is a value for an option @code{agetty.tty} in the kernel
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command line, agetty will extract the device name of the serial port
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from it and use that.
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If not and if there is a value for an option @code{console} with a tty in
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the Linux command line, agetty will extract the device name of the
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serial port from it and use that.
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In both cases, agetty will leave the other serial device settings
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(baud rate etc.) alone---in the hope that Linux pinned them to the
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correct values.
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@item @code{baud-rate} (default: @code{#f})
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A string containing a comma-separated list of one or more baud rates, in
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@ -817,7 +817,7 @@ the message of the day, among other things."
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agetty-configuration?
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(agetty agetty-configuration-agetty ;<package>
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(default util-linux))
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(tty agetty-configuration-tty) ;string
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(tty agetty-configuration-tty) ;string | #f
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(term agetty-term ;string | #f
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(default #f))
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(baud-rate agetty-baud-rate ;string | #f
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@ -890,6 +890,40 @@ the message of the day, among other things."
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;;; (default #f))
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)
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(define (default-serial-port)
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"Return a gexp that determines a reasonable default serial port
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to use as the tty. This is primarily useful for headless systems."
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#~(begin
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;; console=device,options
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;; device: can be tty0, ttyS0, lp0, ttyUSB0 (serial).
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;; options: BBBBPNF. P n|o|e, N number of bits,
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;; F flow control (r RTS)
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(let* ((not-comma (char-set-complement (char-set #\,)))
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(command (linux-command-line))
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(agetty-specs (find-long-options "agetty.tty" command))
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(console-specs (filter (lambda (spec)
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(and (string-prefix? "tty" spec)
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(not (or
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(string-prefix? "tty0" spec)
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(string-prefix? "tty1" spec)
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(string-prefix? "tty2" spec)
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(string-prefix? "tty3" spec)
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(string-prefix? "tty4" spec)
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(string-prefix? "tty5" spec)
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(string-prefix? "tty6" spec)
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(string-prefix? "tty7" spec)
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(string-prefix? "tty8" spec)
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(string-prefix? "tty9" spec)))))
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(find-long-options "console" command)))
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(specs (append agetty-specs console-specs)))
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(match specs
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(() #f)
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((spec _ ...)
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;; Extract device name from first spec.
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(match (string-tokenize spec not-comma)
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((device-name _ ...)
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device-name)))))))
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(define agetty-shepherd-service
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(match-lambda
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(($ <agetty-configuration> agetty tty term baud-rate auto-login
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@ -900,8 +934,9 @@ the message of the day, among other things."
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erase-characters kill-characters chdir delay nice extra-options)
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(list
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(shepherd-service
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(modules '((ice-9 match) (gnu build linux-boot)))
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(documentation "Run agetty on a tty.")
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(provision (list (symbol-append 'term- (string->symbol tty))))
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(provision (list (symbol-append 'term- (string->symbol (or tty "auto")))))
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;; Since the login prompt shows the host name, wait for the 'host-name'
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;; service to be done. Also wait for udev essentially so that the tty
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@ -946,6 +981,9 @@ the message of the day, among other things."
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('always "--local-line=always")
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('never "-local-line=never")))
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#~())
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#$@(if tty
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#~()
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#~("--keep-baud"))
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#$@(if extract-baud?
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#~("--extract-baud")
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#~())
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@ -1009,7 +1047,7 @@ the message of the day, among other things."
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#$@(if login-pause?
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#~("--login-pause")
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#~())
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#$tty
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#$(or tty (default-serial-port))
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#$@(if baud-rate
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#~(#$baud-rate)
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#~())
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@ -1058,7 +1096,9 @@ the tty to run, among other things."
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;; text is not lost in the middle of kernel messages (XXX).
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(requirement '(user-processes host-name udev))
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(start #~(make-forkexec-constructor
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(start #~(let ((tty #$(default-serial-port)))
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(if tty
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(make-forkexec-constructor
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(list #$(file-append mingetty "/sbin/mingetty")
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"--noclear" #$tty
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#$@(if auto-login
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@ -1069,7 +1109,8 @@ the tty to run, among other things."
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#~())
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#$@(if login-pause?
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#~("--loginpause")
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#~()))))
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#~())))
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(const #f)))) ; never start.
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(stop #~(make-kill-destructor)))))))
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(define mingetty-service-type
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@ -2012,6 +2053,11 @@ This service is not part of @var{%base-services}."
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(cons tty %default-console-font))
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'("tty1" "tty2" "tty3" "tty4" "tty5" "tty6")))
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(agetty-service (agetty-configuration
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(extra-options '("-L")) ; no carrier detect
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(term "vt100")
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(tty #f))) ; automatic
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(mingetty-service (mingetty-configuration
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(tty "tty1")))
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(mingetty-service (mingetty-configuration
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@ -381,14 +381,6 @@ You have been warned. Thanks for being so brave.\x1b[0m
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nvi ;:wq!
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%base-packages))))
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(define* (agetty-default-service #:optional (tty "ttyS0"))
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"Return an agetty-service on the given TTY"
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(agetty-service (agetty-configuration
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(extra-options '("-L"))
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(baud-rate "115200")
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(term "vt100")
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(tty tty))))
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(define* (embedded-installation-os bootloader bootloader-target tty
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#:key (extra-modules '()))
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"Return an installation os for embedded systems.
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@ -401,12 +393,13 @@ The bootloader BOOTLOADER is installed to BOOTLOADER-TARGET."
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(bootloader bootloader)
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(target bootloader-target)))
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(kernel linux-libre)
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(kernel-arguments
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(cons (string-append "console=" tty)
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(operating-system-user-kernel-arguments installation-os)))
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(initrd (lambda (fs . rest)
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(apply base-initrd fs
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#:extra-modules extra-modules
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rest)))
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(services (cons* (agetty-default-service tty)
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(operating-system-user-services installation-os)))))
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rest)))))
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(define beaglebone-black-installation-os
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(embedded-installation-os u-boot-beaglebone-black-bootloader
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