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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2015 David Thompson <davet@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (test-syscalls)
#:use-module (guix utils)
#:use-module (guix build syscalls)
#:use-module (gnu build linux-container)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-64)
#:use-module (ice-9 match))
;; Test the (guix build syscalls) module, although there's not much that can
;; actually be tested without being root.
(test-begin "syscalls")
(test-equal "mount, ENOENT"
ENOENT
(catch 'system-error
(lambda ()
(mount "/dev/null" "/does-not-exist" "ext2")
#f)
(compose system-error-errno list)))
(test-assert "umount, ENOENT/EPERM"
(catch 'system-error
(lambda ()
(umount "/does-not-exist")
#f)
(lambda args
;; Both return values have been encountered in the wild.
(memv (system-error-errno args) (list EPERM ENOENT)))))
(test-assert "mount-points"
;; Reportedly "/" is not always listed as a mount point, so check a few
;; others (see <http://bugs.gnu.org/20261>.)
(any (cute member <> (mount-points))
'("/" "/proc" "/sys" "/dev")))
(test-assert "swapon, ENOENT/EPERM"
(catch 'system-error
(lambda ()
(swapon "/does-not-exist")
#f)
(lambda args
(memv (system-error-errno args) (list EPERM ENOENT)))))
(test-assert "swapoff, ENOENT/EINVAL/EPERM"
(catch 'system-error
(lambda ()
(swapoff "/does-not-exist")
#f)
(lambda args
(memv (system-error-errno args) (list EPERM EINVAL ENOENT)))))
(test-assert "mkdtemp!"
(let* ((tmp (or (getenv "TMPDIR") "/tmp"))
(dir (mkdtemp! (string-append tmp "/guix-test-XXXXXX"))))
(and (file-exists? dir)
(begin
(rmdir dir)
#t))))
(define (user-namespace pid)
(string-append "/proc/" (number->string pid) "/ns/user"))
(define perform-container-tests?
(and (user-namespace-supported?)
(unprivileged-user-namespace-supported?)))
(unless perform-container-tests?
(test-skip 1))
(test-assert "clone"
(match (clone (logior CLONE_NEWUSER SIGCHLD))
(0 (primitive-exit 42))
(pid
;; Check if user namespaces are different.
(and (not (equal? (readlink (user-namespace pid))
(readlink (user-namespace (getpid)))))
(match (waitpid pid)
((_ . status)
(= 42 (status:exit-val status))))))))
(unless perform-container-tests?
(test-skip 1))
(test-assert "setns"
(match (clone (logior CLONE_NEWUSER SIGCHLD))
(0 (primitive-exit 0))
(clone-pid
(match (pipe)
((in . out)
(match (primitive-fork)
(0
(close in)
;; Join the user namespace.
(call-with-input-file (user-namespace clone-pid)
(lambda (port)
(setns (port->fdes port) 0)))
(write 'done out)
(close out)
(primitive-exit 0))
(fork-pid
(close out)
;; Wait for the child process to join the namespace.
(read in)
(let ((result (and (equal? (readlink (user-namespace clone-pid))
(readlink (user-namespace fork-pid))))))
;; Clean up.
(waitpid clone-pid)
(waitpid fork-pid)
result))))))))
(unless perform-container-tests?
(test-skip 1))
(test-assert "pivot-root"
(match (pipe)
((in . out)
(match (clone (logior CLONE_NEWUSER CLONE_NEWNS SIGCHLD))
(0
(close in)
(call-with-temporary-directory
(lambda (root)
(let ((put-old (string-append root "/real-root")))
(mount "none" root "tmpfs")
(mkdir put-old)
(call-with-output-file (string-append root "/test")
(lambda (port)
(display "testing\n" port)))
(pivot-root root put-old)
;; The test file should now be located inside the root directory.
(write (file-exists? "/test") out)
(close out))))
(primitive-exit 0))
(pid
(close out)
(let ((result (read in)))
(close in)
(and (zero? (match (waitpid pid)
((_ . status)
(status:exit-val status))))
(eq? #t result))))))))
(test-assert "all-network-interface-names"
(match (all-network-interface-names)
(((? string? names) ..1)
(member "lo" names))))
(test-assert "network-interface-names"
(match (network-interface-names)
(((? string? names) ..1)
(lset<= string=? names (all-network-interface-names)))))
(test-assert "network-interface-flags"
(let* ((sock (socket AF_INET SOCK_STREAM 0))
(flags (network-interface-flags sock "lo")))
(close-port sock)
(and (not (zero? (logand flags IFF_LOOPBACK)))
(not (zero? (logand flags IFF_UP))))))
(test-equal "loopback-network-interface?"
ENODEV
(and (loopback-network-interface? "lo")
(catch 'system-error
(lambda ()
(loopback-network-interface? "nonexistent")
#f)
(lambda args
(system-error-errno args)))))
(test-skip (if (zero? (getuid)) 1 0))
(test-assert "set-network-interface-flags"
(let ((sock (socket AF_INET SOCK_STREAM 0)))
(catch 'system-error
(lambda ()
(set-network-interface-flags sock "lo" IFF_UP))
(lambda args
(close-port sock)
;; We get EPERM with Linux 3.18ish and EACCES with 2.6.32.
(memv (system-error-errno args) (list EPERM EACCES))))))
(test-equal "network-interface-address lo"
(make-socket-address AF_INET (inet-pton AF_INET "127.0.0.1") 0)
(let* ((sock (socket AF_INET SOCK_STREAM 0))
(addr (network-interface-address sock "lo")))
(close-port sock)
addr))
(test-skip (if (zero? (getuid)) 1 0))
(test-assert "set-network-interface-address"
(let ((sock (socket AF_INET SOCK_STREAM 0)))
(catch 'system-error
(lambda ()
(set-network-interface-address sock "nonexistent"
(make-socket-address
AF_INET
(inet-pton AF_INET "127.12.14.15")
0)))
(lambda args
(close-port sock)
;; We get EPERM with Linux 3.18ish and EACCES with 2.6.32.
(memv (system-error-errno args) (list EPERM EACCES))))))
(test-equal "network-interfaces returns one or more interfaces"
'(#t #t #t)
(match (network-interfaces)
((interfaces ..1)
(list (every interface? interfaces)
(every string? (map interface-name interfaces))
(every (lambda (sockaddr)
;; Sometimes interfaces have no associated address.
(or (vector? sockaddr)
(not sockaddr)))
(map interface-address interfaces))))))
(test-equal "network-interfaces returns \"lo\""
(list #t (make-socket-address AF_INET (inet-pton AF_INET "127.0.0.1") 0))
(match (filter (lambda (interface)
(string=? "lo" (interface-name interface)))
(network-interfaces))
((loopbacks ..1)
(list (every (lambda (lo)
(not (zero? (logand IFF_LOOPBACK (interface-flags lo)))))
loopbacks)
(match (find (lambda (lo)
(= AF_INET (sockaddr:fam (interface-address lo))))
loopbacks)
(#f #f)
(lo (interface-address lo)))))))
(test-equal "terminal-window-size ENOTTY"
ENOTTY
(call-with-input-file "/dev/null"
(lambda (port)
(catch 'system-error
(lambda ()
(terminal-window-size port))
(lambda args
(system-error-errno args))))))
(test-assert "terminal-columns"
(> (terminal-columns) 0))
(test-assert "terminal-columns non-file port"
(> (terminal-columns (open-input-string "Join us now, share the software!"))
0))
(test-end)
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