diff options
| -rw-r--r-- | doc/guix.texi | 15 | ||||
| -rw-r--r-- | gnu/services/base.scm | 76 | ||||
| -rw-r--r-- | gnu/system/install.scm | 15 |
3 files changed, 79 insertions, 27 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index 9dafe60eeb..8a9e1bc992 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -9724,7 +9724,20 @@ man page for more information. @item @code{tty} The name of the console this agetty runs on, as a string---e.g., -@code{"ttyS0"}. This argument is mandatory. +@code{"ttyS0"}. This argument is optional, it will default to +a reasonable default serial port used by the kernel Linux. + +For this, if there is a value for an option @code{agetty.tty} in the kernel +command line, agetty will extract the device name of the serial port +from it and use that. + +If not and if there is a value for an option @code{console} with a tty in +the Linux command line, agetty will extract the device name of the +serial port from it and use that. + +In both cases, agetty will leave the other serial device settings +(baud rate etc.) alone---in the hope that Linux pinned them to the +correct values. @item @code{baud-rate} (default: @code{#f}) A string containing a comma-separated list of one or more baud rates, in diff --git a/gnu/services/base.scm b/gnu/services/base.scm index 8e30bcd341..e1c6346175 100644 --- a/gnu/services/base.scm +++ b/gnu/services/base.scm @@ -817,7 +817,7 @@ the message of the day, among other things." agetty-configuration? (agetty agetty-configuration-agetty ;<package> (default util-linux)) - (tty agetty-configuration-tty) ;string + (tty agetty-configuration-tty) ;string | #f (term agetty-term ;string | #f (default #f)) (baud-rate agetty-baud-rate ;string | #f @@ -890,6 +890,40 @@ the message of the day, among other things." ;;; (default #f)) ) +(define (default-serial-port) + "Return a gexp that determines a reasonable default serial port +to use as the tty. This is primarily useful for headless systems." + #~(begin + ;; console=device,options + ;; device: can be tty0, ttyS0, lp0, ttyUSB0 (serial). + ;; options: BBBBPNF. P n|o|e, N number of bits, + ;; F flow control (r RTS) + (let* ((not-comma (char-set-complement (char-set #\,))) + (command (linux-command-line)) + (agetty-specs (find-long-options "agetty.tty" command)) + (console-specs (filter (lambda (spec) + (and (string-prefix? "tty" spec) + (not (or + (string-prefix? "tty0" spec) + (string-prefix? "tty1" spec) + (string-prefix? "tty2" spec) + (string-prefix? "tty3" spec) + (string-prefix? "tty4" spec) + (string-prefix? "tty5" spec) + (string-prefix? "tty6" spec) + (string-prefix? "tty7" spec) + (string-prefix? "tty8" spec) + (string-prefix? "tty9" spec))))) + (find-long-options "console" command))) + (specs (append agetty-specs console-specs))) + (match specs + (() #f) + ((spec _ ...) + ;; Extract device name from first spec. + (match (string-tokenize spec not-comma) + ((device-name _ ...) + device-name))))))) + (define agetty-shepherd-service (match-lambda (($ <agetty-configuration> agetty tty term baud-rate auto-login @@ -900,8 +934,9 @@ the message of the day, among other things." erase-characters kill-characters chdir delay nice extra-options) (list (shepherd-service + (modules '((ice-9 match) (gnu build linux-boot))) (documentation "Run agetty on a tty.") - (provision (list (symbol-append 'term- (string->symbol tty)))) + (provision (list (symbol-append 'term- (string->symbol (or tty "auto"))))) ;; Since the login prompt shows the host name, wait for the 'host-name' ;; service to be done. Also wait for udev essentially so that the tty @@ -946,6 +981,9 @@ the message of the day, among other things." ('always "--local-line=always") ('never "-local-line=never"))) #~()) + #$@(if tty + #~() + #~("--keep-baud")) #$@(if extract-baud? #~("--extract-baud") #~()) @@ -1009,7 +1047,7 @@ the message of the day, among other things." #$@(if login-pause? #~("--login-pause") #~()) - #$tty + #$(or tty (default-serial-port)) #$@(if baud-rate #~(#$baud-rate) #~()) @@ -1058,18 +1096,21 @@ the tty to run, among other things." ;; text is not lost in the middle of kernel messages (XXX). (requirement '(user-processes host-name udev)) - (start #~(make-forkexec-constructor - (list #$(file-append mingetty "/sbin/mingetty") - "--noclear" #$tty - #$@(if auto-login - #~("--autologin" #$auto-login) - #~()) - #$@(if login-program - #~("--loginprog" #$login-program) - #~()) - #$@(if login-pause? - #~("--loginpause") - #~())))) + (start #~(let ((tty #$(default-serial-port))) + (if tty + (make-forkexec-constructor + (list #$(file-append mingetty "/sbin/mingetty") + "--noclear" #$tty + #$@(if auto-login + #~("--autologin" #$auto-login) + #~()) + #$@(if login-program + #~("--loginprog" #$login-program) + #~()) + #$@(if login-pause? + #~("--loginpause") + #~()))) + (const #f)))) ; never start. (stop #~(make-kill-destructor))))))) (define mingetty-service-type @@ -2012,6 +2053,11 @@ This service is not part of @var{%base-services}." (cons tty %default-console-font)) '("tty1" "tty2" "tty3" "tty4" "tty5" "tty6"))) + (agetty-service (agetty-configuration + (extra-options '("-L")) ; no carrier detect + (term "vt100") + (tty #f))) ; automatic + (mingetty-service (mingetty-configuration (tty "tty1"))) (mingetty-service (mingetty-configuration diff --git a/gnu/system/install.scm b/gnu/system/install.scm index e4b2e82378..b61660b4b9 100644 --- a/gnu/system/install.scm +++ b/gnu/system/install.scm @@ -381,14 +381,6 @@ You have been warned. Thanks for being so brave.\x1b[0m nvi ;:wq! %base-packages)))) -(define* (agetty-default-service #:optional (tty "ttyS0")) - "Return an agetty-service on the given TTY" - (agetty-service (agetty-configuration - (extra-options '("-L")) - (baud-rate "115200") - (term "vt100") - (tty tty)))) - (define* (embedded-installation-os bootloader bootloader-target tty #:key (extra-modules '())) "Return an installation os for embedded systems. @@ -401,12 +393,13 @@ The bootloader BOOTLOADER is installed to BOOTLOADER-TARGET." (bootloader bootloader) (target bootloader-target))) (kernel linux-libre) + (kernel-arguments + (cons (string-append "console=" tty) + (operating-system-user-kernel-arguments installation-os))) (initrd (lambda (fs . rest) (apply base-initrd fs #:extra-modules extra-modules - rest))) - (services (cons* (agetty-default-service tty) - (operating-system-user-services installation-os))))) + rest))))) (define beaglebone-black-installation-os (embedded-installation-os u-boot-beaglebone-black-bootloader |