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authorJan (janneke) Nieuwenhuizen <janneke@gnu.org>2020-06-08 13:02:13 +0200
committerJan Nieuwenhuizen <janneke@gnu.org>2020-06-19 10:38:26 +0200
commit951847ee3792f8fa57d2bd38d84d9fa9c276c0fa (patch)
treefb932bb4bc3792d5328680c6f1cb3b63a17aaa98 /gnu/build
parent42ed562691640fc38a08e2269379fc181bdfe0f9 (diff)
downloadguix-951847ee3792f8fa57d2bd38d84d9fa9c276c0fa.tar.gz
guix-951847ee3792f8fa57d2bd38d84d9fa9c276c0fa.zip
hurd-boot: Create individual translators instead of running MAKEDEV.
* gnu/build/hurd-boot.scm (make-hurd-device-nodes): Do not create dev/{null,zero,full,random,urandom} mount points. (passive-translator-xattr?, passive-translator-installed?, translated?, set-translator, set-hurd-device-translators): New procedures. (false-if-EEXIST): New macro. (boot-hurd-system): Use them instead of running MAKEDEV.
Diffstat (limited to 'gnu/build')
-rw-r--r--gnu/build/hurd-boot.scm190
1 files changed, 143 insertions, 47 deletions
diff --git a/gnu/build/hurd-boot.scm b/gnu/build/hurd-boot.scm
index 09326233d2..f4b6dc734d 100644
--- a/gnu/build/hurd-boot.scm
+++ b/gnu/build/hurd-boot.scm
@@ -80,16 +80,8 @@ Return the value associated with OPTION, or #f on failure."
(string-append root (if (string-suffix? "/" root) "" "/") dir))
(mkdir (scope "dev"))
- (for-each (lambda (file)
- (call-with-output-file (scope file)
- (lambda (port)
- (display file port) ;avoid hard-linking
- (chmod port #o666))))
- '("dev/null"
- "dev/zero"
- "dev/full"
- "dev/random"
- "dev/urandom"))
+ ;; Don't create /dev/null etc just yet; the store
+ ;; messes-up the permission bits.
;; Don't create /dev/console, /dev/vcs, etc.: they are created by
;; console-run on first boot.
@@ -115,6 +107,143 @@ Return the value associated with OPTION, or #f on failure."
;; settings?
)
+(define (passive-translator-xattr? file-name)
+ "Return true if FILE-NAME has an extended @code{gnu.translator} attribute
+set."
+ (catch 'system-error
+ (lambda _ (not (string-null? (getxattr file-name "gnu.translator"))))
+ (lambda args
+ (if (= ENODATA (system-error-errno args))
+ #f
+ (apply throw args)))))
+
+(define (passive-translator-installed? file-name)
+ "Return true if @file{showtrans} finds a translator installed on FILE-NAME."
+ (with-output-to-port (%make-void-port "w")
+ (lambda _
+ (with-error-to-port (%make-void-port "w")
+ (lambda _
+ (zero? (system* "showtrans" "--silent" file-name)))))))
+
+(define (translated? file-name)
+ "Return true if a translator is installed on FILE-NAME."
+ (if (string-contains %host-type "linux-gnu")
+ (passive-translator-xattr? file-name)
+ (passive-translator-installed? file-name)))
+
+(define* (set-translator file-name command #:optional (mode #o600))
+ "Setup translator COMMAND on FILE-NAME."
+ (unless (translated? file-name)
+ (let ((dir (dirname file-name)))
+ (unless (directory-exists? dir)
+ (mkdir-p dir))
+ (unless (file-exists? file-name)
+ (call-with-output-file file-name
+ (lambda (port)
+ (display file-name port) ;avoid hard-linking
+ (chmod port mode)))))
+ (catch 'system-error
+ (lambda _
+ (apply invoke "settrans" "--create" file-name command))
+ (lambda (key . args)
+ (let ((errno (system-error-errno (cons key args))))
+ (format (current-error-port) "~a: ~a\n"
+ (strerror errno) file-name)
+ (format (current-error-port) "Ignoring...Good Luck!\n"))))))
+
+(define-syntax-rule (false-if-EEXIST exp)
+ "Evaluate EXP but return #f if it raises to 'system-error with EEXIST."
+ (catch 'system-error
+ (lambda () exp)
+ (lambda args
+ (if (= EEXIST (system-error-errno args))
+ #f
+ (apply throw args)))))
+
+(define* (set-hurd-device-translators #:optional (root "/"))
+ "Make some of the device nodes needed on GNU/Hurd."
+
+ (define (scope dir)
+ (string-append root (if (string-suffix? "/" root) "" "/") dir))
+
+ (define scope-set-translator
+ (match-lambda
+ ((file-name command)
+ (scope-set-translator (list file-name command #o600)))
+ ((file-name command mode)
+ (let ((mount-point (scope file-name)))
+ (set-translator mount-point command mode)))))
+
+ (define (mkdir* dir)
+ (let ((dir (scope dir)))
+ (unless (file-exists? dir)
+ (mkdir-p dir))))
+
+ (define servers
+ '(("servers/crash-dump-core" ("/hurd/crash" "--dump-core"))
+ ("servers/crash-kill" ("/hurd/crash" "--kill"))
+ ("servers/crash-suspend" ("/hurd/crash" "--suspend"))
+ ("servers/password" ("/hurd/password"))
+ ("servers/socket/1" ("/hurd/pflocal"))
+ ("servers/socket/2" ("/hurd/pfinet"
+ "--interface" "eth0"
+ "--address"
+ "10.0.2.15" ;the default QEMU guest IP
+ "--netmask" "255.255.255.0"
+ "--gateway" "10.0.2.2"
+ "--ipv6" "/servers/socket/16"))))
+
+ (define devices
+ '(("dev/full" ("/hurd/null" "--full") #o666)
+ ("dev/null" ("/hurd/null") #o666)
+ ("dev/random" ("/hurd/random" "--seed-file" "/var/lib/random-seed")
+ #o644)
+ ("dev/zero" ("/hurd/storeio" "--store-type=zero") #o666)
+
+ ("dev/console" ("/hurd/term" "/dev/console" "device" "console"))
+
+ ("dev/klog" ("/hurd/streamio" "kmsg"))
+ ("dev/mem" ("/hurd/storeio" "--no-cache" "mem") #o660)
+ ("dev/shm" ("/hurd/tmpfs" "--mode=1777" "50%") #o644)
+ ("dev/time" ("/hurd/storeio" "--no-cache" "time") #o644)
+
+ ("dev/vcs" ("/hurd/console"))
+ ("dev/tty" ("/hurd/magic" "tty") #o666)
+
+ ("dev/tty1" ("/hurd/term" "/dev/tty1" "hurdio" "/dev/vcs/1/console")
+ #o666)
+ ("dev/tty2" ("/hurd/term" "/dev/tty2" "hurdio" "/dev/vcs/2/console")
+ #o666)
+ ("dev/tty3" ("/hurd/term" "/dev/tty3" "hurdio" "/dev/vcs/3/console")
+ #o666)
+
+ ("dev/ptyp0" ("/hurd/term" "/dev/ptyp0" "pty-master" "/dev/ttyp0")
+ #o666)
+ ("dev/ptyp1" ("/hurd/term" "/dev/ptyp1" "pty-master" "/dev/ttyp1")
+ #o666)
+ ("dev/ptyp2" ("/hurd/term" "/dev/ptyp2" "pty-master" "/dev/ttyp2")
+ #o666)
+
+ ("dev/ttyp0" ("/hurd/term" "/dev/ttyp0" "pty-slave" "/dev/ptyp0")
+ #o666)
+ ("dev/ttyp1" ("/hurd/term" "/dev/ttyp1" "pty-slave" "/dev/ptyp1")
+ #o666)
+ ("dev/ttyp2" ("/hurd/term" "/dev/ttyp2" "pty-slave" "/dev/ptyp2")
+ #o666)))
+
+ (for-each scope-set-translator servers)
+ (mkdir* (scope "dev/vcs/1"))
+ (mkdir* (scope "dev/vcs/2"))
+ (mkdir* (scope "dev/vcs/2"))
+ (rename-file (scope "/dev/console") (scope "/dev/console-"))
+ (for-each scope-set-translator devices)
+
+ (false-if-EEXIST (symlink "/dev/random" (scope "dev/urandom")))
+ (mkdir* (scope "dev/fd"))
+ (false-if-EEXIST (symlink "/dev/fd/0" (scope "dev/stdin")))
+ (false-if-EEXIST (symlink "/dev/fd/1" (scope "dev/stdout")))
+ (false-if-EEXIST (symlink "/dev/fd/2" (scope "dev/stderr"))))
+
(define* (boot-hurd-system #:key (on-error 'debug))
"This procedure is meant to be called from an early RC script.
@@ -126,20 +255,9 @@ starting the Shepherd.
XXX TODO: see linux-boot.scm:boot-system.
XXX TODO: add proper file-system checking, mounting
XXX TODO: move bits to (new?) (hurd?) (activation?) services
-XXX TODO: use settrans/setxattr instead of MAKEDEV
+XXX TODO: use Linux xattr/setxattr to remove (settrans in) /libexec/RUNSYSTEM
"
- (define translators
- '(("/servers/crash-dump-core" ("/hurd/crash" "--dump-core"))
- ("/servers/crash-kill" ("/hurd/crash" "--kill"))
- ("/servers/crash-suspend" ("/hurd/crash" "--suspend"))
- ("/servers/password" ("/hurd/password"))
- ("/servers/socket/1" ("/hurd/pflocal"))
- ("/servers/socket/2" ("/hurd/pfinet" "--interface" "eth0"
- "--address" "10.0.2.15" ;the default QEMU guest IP
- "--netmask" "255.255.255.0"
- "--gateway" "10.0.2.2"
- "--ipv6" "/servers/socket/16"))))
(display "Welcome, this is GNU's early boot Guile.\n")
(display "Use '--repl' for an initrd REPL.\n\n")
@@ -147,35 +265,13 @@ XXX TODO: use settrans/setxattr instead of MAKEDEV
(call-with-error-handling
(lambda ()
- (define (translated? node)
- ;; Return true if a translator is installed on NODE.
- (with-output-to-port (%make-void-port "w")
- (lambda ()
- (with-error-to-port (%make-void-port "w")
- (lambda ()
- (zero? (system* "showtrans" "--silent" node)))))))
-
(let* ((args (command-line))
(system (find-long-option "--system" args))
(to-load (find-long-option "--load" args)))
- (format #t "Creating essential servers...\n")
- (setenv "PATH" (string-append system "/profile/bin"
- ":" system "/profile/sbin"))
- (for-each (match-lambda
- ((node command)
- (unless (translated? node)
- (mkdir-p (dirname node))
- (apply invoke "settrans" "--create" node command))))
- translators)
-
- (format #t "Creating essential device nodes...\n")
- (with-directory-excursion "/dev"
- (invoke "MAKEDEV" "--devdir=/dev" "std")
- (invoke "MAKEDEV" "--devdir=/dev" "vcs")
- (invoke "MAKEDEV" "--devdir=/dev" "tty1""tty2" "tty3" "tty4" "tty5" "tty6")
- (invoke "MAKEDEV" "--devdir=/dev" "ptyp0" "ptyp1" "ptyp2")
- (invoke "MAKEDEV" "--devdir=/dev" "console"))
+ (format #t "Setting-up essential translators...\n")
+ (setenv "PATH" (string-append system "/profile/bin"))
+ (set-hurd-device-translators)
(false-if-exception (delete-file "/hurd"))
(let ((hurd/hurd (readlink* (string-append system "/profile/hurd"))))