diff options
| -rw-r--r-- | guix/build/syscalls.scm | 113 | ||||
| -rw-r--r-- | tests/syscalls.scm | 13 |
2 files changed, 124 insertions, 2 deletions
diff --git a/guix/build/syscalls.scm b/guix/build/syscalls.scm index c06013cd08..475fc96490 100644 --- a/guix/build/syscalls.scm +++ b/guix/build/syscalls.scm @@ -25,6 +25,7 @@ #:use-module (srfi srfi-9) #:use-module (srfi srfi-9 gnu) #:use-module (srfi srfi-11) + #:use-module (srfi srfi-19) #:use-module (ice-9 rdelim) #:use-module (ice-9 regex) #:use-module (ice-9 match) @@ -126,7 +127,22 @@ window-size-x-pixels window-size-y-pixels terminal-window-size - terminal-columns)) + terminal-columns + + utmpx? + utmpx-login-type + utmpx-pid + utmpx-line + utmpx-id + utmpx-user + utmpx-host + utmpx-termination-status + utmpx-exit-status + utmpx-session-id + utmpx-time + utmpx-address + login-type + utmpx-entries)) ;;; Commentary: ;;; @@ -1487,4 +1503,99 @@ always a positive integer." (fall-back) (apply throw args)))))) + +;;; +;;; utmpx. +;;; + +(define-record-type <utmpx-entry> + (utmpx type pid line id user host termination exit + session time address) + utmpx? + (type utmpx-login-type) ;login-type + (pid utmpx-pid) + (line utmpx-line) ;device name + (id utmpx-id) + (user utmpx-user) ;user name + (host utmpx-host) ;host name | #f + (termination utmpx-termination-status) + (exit utmpx-exit-status) + (session utmpx-session-id) ;session ID, for windowing + (time utmpx-time) ;entry time + (address utmpx-address)) + +(define-c-struct %utmpx ;<utmpx.h> + sizeof-utmpx + (lambda (type pid line id user host termination exit session + seconds useconds address %reserved) + (utmpx type pid + (bytes->string line) id + (bytes->string user) + (bytes->string host) termination exit + session + (make-time time-utc (* 1000 useconds) seconds) + address)) + read-utmpx + write-utmpx! + (type short) + (pid int) + (line (array uint8 32)) + (id (array uint8 4)) + (user (array uint8 32)) + (host (array uint8 256)) + (termination short) + (exit short) + (session int32) + (time-seconds int32) + (time-useconds int32) + (address-v6 (array int32 4)) + (%reserved (array uint8 20))) + +(define-bits login-type + %unused-login-type->symbols + (define EMPTY 0) ;No valid user accounting information. + (define RUN_LVL 1) ;The system's runlevel. + (define BOOT_TIME 2) ;Time of system boot. + (define NEW_TIME 3) ;Time after system clock changed. + (define OLD_TIME 4) ;Time when system clock changed. + + (define INIT_PROCESS 5) ;Process spawned by the init process. + (define LOGIN_PROCESS 6) ;Session leader of a logged in user. + (define USER_PROCESS 7) ;Normal process. + (define DEAD_PROCESS 8) ;Terminated process. + + (define ACCOUNTING 9)) ;System accounting. + +(define setutxent + (let ((proc (syscall->procedure void "setutxent" '()))) + (lambda () + "Open the user accounting database." + (proc)))) + +(define endutxent + (let ((proc (syscall->procedure void "endutxent" '()))) + (lambda () + "Close the user accounting database." + (proc)))) + +(define getutxent + (let ((proc (syscall->procedure '* "getutxent" '()))) + (lambda () + "Return the next entry from the user accounting database." + (let ((ptr (proc))) + (if (null-pointer? ptr) + #f + (read-utmpx (pointer->bytevector ptr sizeof-utmpx))))))) + +(define (utmpx-entries) + "Return the list of entries read from the user accounting database." + (setutxent) + (let loop ((entries '())) + (match (getutxent) + (#f + (endutxent) + (reverse entries)) + ((? utmpx? entry) + (loop (cons entry entries)))))) + ;;; syscalls.scm ends here diff --git a/tests/syscalls.scm b/tests/syscalls.scm index e4ef32c522..fb2c8e7100 100644 --- a/tests/syscalls.scm +++ b/tests/syscalls.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2015 David Thompson <davet@gnu.org> ;;; ;;; This file is part of GNU Guix. @@ -441,6 +441,17 @@ (> (terminal-columns (open-input-string "Join us now, share the software!")) 0)) +(test-assert "utmpx-entries" + (match (utmpx-entries) + (((? utmpx? entries) ...) + (every (lambda (entry) + (match (utmpx-user entry) + ((? string?) + (> (utmpx-pid entry) 0)) + (#f ;might be DEAD_PROCESS + #t))) + entries)))) + (test-end) (false-if-exception (delete-file temp-file)) |