7e9d9f28e9
* guix/build/syscalls.scm (<mount>): New record type.
(option-string->mount-flags, mount-flags)
(octal-decode, mounts): New procedures.
(mount-points): Rewrite in terms of 'mount'.
* tests/syscalls.scm ("mounts"): New test.
627 lines
21 KiB
Scheme
627 lines
21 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
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;;; Copyright © 2015 David Thompson <davet@gnu.org>
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;;; Copyright © 2020 Simon South <simon@simonsouth.net>
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;;; Copyright © 2020 Mathieu Othacehe <m.othacehe@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (test-syscalls)
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#:use-module (guix utils)
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#:use-module (guix build syscalls)
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#:use-module (gnu build linux-container)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-64)
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#:use-module (system foreign)
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#:use-module ((ice-9 ftw) #:select (scandir))
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#:use-module (ice-9 match))
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;; Test the (guix build syscalls) module, although there's not much that can
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;; actually be tested without being root.
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(define temp-file
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(string-append "t-utils-" (number->string (getpid))))
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(test-begin "syscalls")
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(test-equal "mount, ENOENT"
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ENOENT
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(catch 'system-error
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(lambda ()
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(mount "/dev/null" "/does-not-exist" "ext2")
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#f)
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(compose system-error-errno list)))
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(test-assert "umount, ENOENT/EPERM"
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(catch 'system-error
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(lambda ()
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(umount "/does-not-exist")
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#f)
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(lambda args
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;; Both return values have been encountered in the wild.
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(memv (system-error-errno args) (list EPERM ENOENT)))))
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(test-assert "mounts"
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;; Check for one of the common mount points.
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(let ((mounts (mounts)))
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(any (match-lambda
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((point . type)
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(let ((mount (find (lambda (mount)
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(string=? (mount-point mount) point))
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mounts)))
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(and mount
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(string=? (mount-type mount) type)))))
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'(("/proc" . "proc")
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("/sys" . "sysfs")
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("/dev/shm" . "tmpfs")))))
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(test-assert "mount-points"
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;; Reportedly "/" is not always listed as a mount point, so check a few
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;; others (see <http://bugs.gnu.org/20261>.)
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(any (cute member <> (mount-points))
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'("/" "/proc" "/sys" "/dev")))
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(false-if-exception (delete-file temp-file))
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(test-equal "utime with AT_SYMLINK_NOFOLLOW"
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'(0 0)
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(begin
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;; Test libguile's utime with AT_SYMLINK_NOFOLLOW, which libguile does not
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;; define as of Guile 2.2.4.
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(symlink "/nowhere" temp-file)
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(utime temp-file 0 0 0 0 AT_SYMLINK_NOFOLLOW)
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(let ((st (lstat temp-file)))
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(delete-file temp-file)
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;; Note: 'utimensat' does not change 'ctime'.
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(list (stat:mtime st) (stat:atime st)))))
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(test-assert "swapon, ENOSYS/ENOENT/EPERM"
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(catch 'system-error
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(lambda ()
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(swapon "/does-not-exist")
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#f)
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(lambda args
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(memv (system-error-errno args) (list EPERM ENOENT ENOSYS)))))
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(test-assert "swapoff, ENOSYS/ENOENT/EINVAL/EPERM"
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(catch 'system-error
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(lambda ()
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(swapoff "/does-not-exist")
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#f)
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(lambda args
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(memv (system-error-errno args) (list EPERM EINVAL ENOENT ENOSYS)))))
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(test-assert "mkdtemp!"
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(let* ((tmp (or (getenv "TMPDIR") "/tmp"))
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(dir (mkdtemp! (string-append tmp "/guix-test-XXXXXX"))))
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(and (file-exists? dir)
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(begin
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(rmdir dir)
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#t))))
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(test-equal "statfs, ENOENT"
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ENOENT
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(catch 'system-error
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(lambda ()
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(statfs "/does-not-exist"))
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(compose system-error-errno list)))
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(test-assert "statfs"
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(let ((fs (statfs "/")))
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(and (file-system? fs)
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(> (file-system-block-size fs) 0)
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(>= (file-system-blocks-available fs) 0)
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(>= (file-system-blocks-free fs)
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(file-system-blocks-available fs)))))
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(define (user-namespace pid)
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(string-append "/proc/" (number->string pid) "/ns/user"))
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(define perform-container-tests?
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(and (user-namespace-supported?)
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(unprivileged-user-namespace-supported?)))
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(unless perform-container-tests?
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(test-skip 1))
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(test-assert "clone"
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(match (clone (logior CLONE_NEWUSER SIGCHLD))
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(0 (primitive-exit 42))
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(pid
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;; Check if user namespaces are different.
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(and (not (equal? (readlink (user-namespace pid))
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(readlink (user-namespace (getpid)))))
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(match (waitpid pid)
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((_ . status)
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(= 42 (status:exit-val status))))))))
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(unless perform-container-tests?
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(test-skip 1))
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(test-assert "setns"
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(match (clone (logior CLONE_NEWUSER SIGCHLD))
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(0 (primitive-exit 0))
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(clone-pid
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(match (pipe)
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((in . out)
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(match (primitive-fork)
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(0
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(close in)
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;; Join the user namespace.
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(call-with-input-file (user-namespace clone-pid)
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(lambda (port)
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(setns (port->fdes port) 0)))
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(write 'done out)
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(close out)
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(primitive-exit 0))
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(fork-pid
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(close out)
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;; Wait for the child process to join the namespace.
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(read in)
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(let ((result (and (equal? (readlink (user-namespace clone-pid))
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(readlink (user-namespace fork-pid))))))
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;; Clean up.
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(waitpid clone-pid)
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(waitpid fork-pid)
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result))))))))
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(when (not perform-container-tests?)
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(test-skip 1))
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(test-equal "pivot-root"
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'success!
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(match (socketpair AF_UNIX SOCK_STREAM 0)
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((parent . child)
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(match (clone (logior CLONE_NEWUSER CLONE_NEWNS SIGCHLD))
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(0
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(dynamic-wind
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(const #t)
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(lambda ()
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(close parent)
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(call-with-temporary-directory
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(lambda (root)
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(display "ready\n" child)
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(read child) ;wait for "go!"
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(let ((put-old (string-append root "/real-root")))
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(mount "none" root "tmpfs")
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(mkdir put-old)
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(call-with-output-file (string-append root "/test")
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(lambda (port)
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(display "testing\n" port)))
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(pivot-root root put-old)
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;; The test file should now be located inside the root directory.
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(write (and (file-exists? "/test") 'success!) child)
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(close child)))))
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(lambda ()
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(primitive-exit 0))))
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(pid
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(close child)
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(match (read parent)
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('ready
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;; Set up the UID/GID mapping so that we can mkdir on the tmpfs:
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;; <https://bugzilla.kernel.org/show_bug.cgi?id=183461>.
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(call-with-output-file (format #f "/proc/~d/setgroups" pid)
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(lambda (port)
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(display "deny" port)))
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(call-with-output-file (format #f "/proc/~d/uid_map" pid)
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(lambda (port)
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(format port "0 ~d 1" (getuid))))
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(call-with-output-file (format #f "/proc/~d/gid_map" pid)
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(lambda (port)
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(format port "0 ~d 1" (getgid))))
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(display "go!\n" parent)
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(let ((result (read parent)))
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(close parent)
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(and (zero? (match (waitpid pid)
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((_ . status)
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(status:exit-val status))))
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result)))))))))
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(test-equal "scandir*, ENOENT"
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ENOENT
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(catch 'system-error
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(lambda ()
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(scandir* "/does/not/exist"))
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(lambda args
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(system-error-errno args))))
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(test-equal "scandir*, ASCII file names"
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(scandir (dirname (search-path %load-path "guix/base32.scm"))
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(const #t) string<?)
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(match (scandir* (dirname (search-path %load-path "guix/base32.scm")))
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(((names . properties) ...)
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names)))
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(test-equal "scandir*, UTF-8 file names"
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'("." ".." "α" "λ")
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(call-with-temporary-directory
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(lambda (directory)
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;; Wrap 'creat' to make sure that we really pass a UTF-8-encoded file
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;; name to the system call.
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(let ((creat (pointer->procedure int
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(dynamic-func "creat" (dynamic-link))
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(list '* int))))
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(creat (string->pointer (string-append directory "/α")
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"UTF-8")
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#o644)
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(creat (string->pointer (string-append directory "/λ")
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"UTF-8")
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#o644)
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(let ((locale (setlocale LC_ALL)))
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(dynamic-wind
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(lambda ()
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;; Make sure that even in a C locale we get the right result.
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(setlocale LC_ALL "C"))
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(lambda ()
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(match (scandir* directory)
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(((names . properties) ...)
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names)))
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(lambda ()
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(setlocale LC_ALL locale))))))))
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(test-assert "scandir*, properties"
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(let ((directory (dirname (search-path %load-path "guix/base32.scm"))))
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(every (lambda (entry name)
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(match entry
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((name2 . properties)
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(and (string=? name2 name)
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(let* ((full (string-append directory "/" name))
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(stat (lstat full))
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(inode (assoc-ref properties 'inode))
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(type (assoc-ref properties 'type)))
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(and (= inode (stat:ino stat))
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(or (eq? type 'unknown)
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(eq? type (stat:type stat)))))))))
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(scandir* directory)
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(scandir directory (const #t) string<?))))
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(false-if-exception (delete-file temp-file))
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(test-assert "getxattr, setxattr"
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(let ((key "user.translator")
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(value "/hurd/pfinet\0")
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(file (open-file temp-file "w0")))
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(catch 'system-error
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(lambda ()
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(setxattr temp-file key value)
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(string=? (getxattr temp-file key) value))
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(lambda args
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;; Accept ENOTSUP, if the file-system does not support extended user
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;; attributes.
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(memv (system-error-errno args) (list ENOTSUP))))))
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(false-if-exception (delete-file temp-file))
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(test-equal "fcntl-flock wait"
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42 ; the child's exit status
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(let ((file (open-file temp-file "w0b")))
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;; Acquire an exclusive lock.
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(fcntl-flock file 'write-lock)
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(match (primitive-fork)
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(0
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(dynamic-wind
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(const #t)
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(lambda ()
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;; Reopen FILE read-only so we can have a read lock.
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(let ((file (open-file temp-file "r0b")))
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;; Wait until we can acquire the lock.
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(fcntl-flock file 'read-lock)
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(primitive-exit (read file)))
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(primitive-exit 1))
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(lambda ()
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(primitive-exit 2))))
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(pid
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;; Write garbage and wait.
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(display "hello, world!" file)
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(force-output file)
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(sleep 1)
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;; Write the real answer.
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(seek file 0 SEEK_SET)
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(truncate-file file 0)
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(write 42 file)
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(force-output file)
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;; Unlock, which should let the child continue.
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(fcntl-flock file 'unlock)
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(match (waitpid pid)
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((_ . status)
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(let ((result (status:exit-val status)))
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(close-port file)
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result)))))))
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(test-equal "fcntl-flock non-blocking"
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EAGAIN ; the child's exit status
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(match (pipe)
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((input . output)
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(match (primitive-fork)
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(0
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(dynamic-wind
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(const #t)
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(lambda ()
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(close-port output)
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;; Wait for the green light.
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(read-char input)
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;; Open FILE read-only so we can have a read lock.
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(let ((file (open-file temp-file "w0")))
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(catch 'flock-error
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(lambda ()
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;; This attempt should throw EAGAIN.
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(fcntl-flock file 'write-lock #:wait? #f))
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(lambda (key errno)
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(primitive-exit (pk 'errno errno)))))
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(primitive-exit -1))
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(lambda ()
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(primitive-exit -2))))
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(pid
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(close-port input)
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(let ((file (open-file temp-file "w0")))
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;; Acquire an exclusive lock.
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(fcntl-flock file 'write-lock)
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;; Tell the child to continue.
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(write 'green-light output)
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(force-output output)
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(match (waitpid pid)
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((_ . status)
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(let ((result (status:exit-val status)))
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(fcntl-flock file 'unlock)
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(close-port file)
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result)))))))))
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(test-equal "set-thread-name"
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"Syscall Test"
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(let ((name (thread-name)))
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(set-thread-name "Syscall Test")
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(let ((new-name (thread-name)))
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(set-thread-name name)
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new-name)))
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(test-assert "all-network-interface-names"
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(match (all-network-interface-names)
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(((? string? names) ..1)
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(member "lo" names))))
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(test-assert "network-interface-names"
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(match (remove (lambda (interface)
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;; Ignore interface aliases since they don't show up in
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;; (all-network-interface-names).
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(string-contains interface ":"))
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(network-interface-names))
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(((? string? names) ..1)
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(lset<= string=? names (all-network-interface-names)))))
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(test-assert "network-interface-flags"
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(let* ((sock (socket AF_INET SOCK_STREAM 0))
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(flags (network-interface-flags sock "lo")))
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(close-port sock)
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(and (not (zero? (logand flags IFF_LOOPBACK)))
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(not (zero? (logand flags IFF_UP))))))
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(test-equal "loopback-network-interface?"
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ENODEV
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(and (loopback-network-interface? "lo")
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(catch 'system-error
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(lambda ()
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(loopback-network-interface? "nonexistent")
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#f)
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(lambda args
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(system-error-errno args)))))
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(test-equal "loopback-network-interface-running?"
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ENODEV
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(and (network-interface-running? "lo")
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(catch 'system-error
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(lambda ()
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(network-interface-running? "nonexistent")
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#f)
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(lambda args
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(system-error-errno args)))))
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(test-skip (if (zero? (getuid)) 1 0))
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(test-assert "set-network-interface-flags"
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(let ((sock (socket AF_INET SOCK_STREAM 0)))
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(catch 'system-error
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(lambda ()
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(set-network-interface-flags sock "lo" IFF_UP))
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(lambda args
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(close-port sock)
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;; We get EPERM with Linux 3.18ish and EACCES with 2.6.32.
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(memv (system-error-errno args) (list EPERM EACCES))))))
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(test-equal "network-interface-address lo"
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(make-socket-address AF_INET (inet-pton AF_INET "127.0.0.1") 0)
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(let* ((sock (socket AF_INET SOCK_STREAM 0))
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(addr (network-interface-address sock "lo")))
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(close-port sock)
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addr))
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||
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(test-skip (if (zero? (getuid)) 1 0))
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||
(test-assert "set-network-interface-address"
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(let ((sock (socket AF_INET SOCK_STREAM 0)))
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(catch 'system-error
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(lambda ()
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(set-network-interface-address sock "nonexistent"
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(make-socket-address
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AF_INET
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(inet-pton AF_INET "127.12.14.15")
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0)))
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(lambda args
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(close-port sock)
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;; We get EPERM with Linux 3.18ish and EACCES with 2.6.32.
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(memv (system-error-errno args) (list EPERM EACCES))))))
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(test-equal "network-interface-netmask lo"
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(make-socket-address AF_INET (inet-pton AF_INET "255.0.0.0") 0)
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(let* ((sock (socket AF_INET SOCK_STREAM 0))
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(addr (network-interface-netmask sock "lo")))
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(close-port sock)
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addr))
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(test-skip (if (zero? (getuid)) 1 0))
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(test-assert "set-network-interface-netmask"
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(let ((sock (socket AF_INET SOCK_STREAM 0)))
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(catch 'system-error
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(lambda ()
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(set-network-interface-netmask sock "nonexistent"
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(make-socket-address
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AF_INET
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(inet-pton AF_INET "255.0.0.0")
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0)))
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(lambda args
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(close-port sock)
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(memv (system-error-errno args) (list EPERM EACCES))))))
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(test-equal "network-interfaces returns one or more interfaces"
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'(#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-skip (if (zero? (getuid)) 1 0))
|
||
(test-assert "add-network-route/gateway"
|
||
(let ((sock (socket AF_INET SOCK_STREAM 0))
|
||
(gateway (make-socket-address AF_INET
|
||
(inet-pton AF_INET "192.168.0.1")
|
||
0)))
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(add-network-route/gateway sock gateway))
|
||
(lambda args
|
||
(close-port sock)
|
||
(memv (system-error-errno args) (list EPERM EACCES))))))
|
||
|
||
(test-skip (if (zero? (getuid)) 1 0))
|
||
(test-assert "delete-network-route"
|
||
(let ((sock (socket AF_INET SOCK_STREAM 0))
|
||
(destination (make-socket-address AF_INET INADDR_ANY 0)))
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(delete-network-route sock destination))
|
||
(lambda args
|
||
(close-port sock)
|
||
(memv (system-error-errno args) (list EPERM EACCES))))))
|
||
|
||
(test-equal "tcgetattr ENOTTY"
|
||
ENOTTY
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(call-with-input-file "/dev/null"
|
||
(lambda (port)
|
||
(tcgetattr (fileno port)))))
|
||
(compose system-error-errno list)))
|
||
|
||
(test-skip (if (and (file-exists? "/proc/self/fd/0")
|
||
(string-prefix? "/dev/pts/" (readlink "/proc/self/fd/0")))
|
||
0
|
||
2))
|
||
|
||
(test-assert "tcgetattr"
|
||
(let ((termios (tcgetattr 0)))
|
||
(and (termios? termios)
|
||
(> (termios-input-speed termios) 0)
|
||
(> (termios-output-speed termios) 0))))
|
||
|
||
(test-assert "tcsetattr"
|
||
(let ((first (tcgetattr 0)))
|
||
(tcsetattr 0 (tcsetattr-action TCSANOW) first)
|
||
(equal? first (tcgetattr 0))))
|
||
|
||
(test-assert "terminal-window-size ENOTTY"
|
||
(call-with-input-file "/dev/null"
|
||
(lambda (port)
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(terminal-window-size port))
|
||
(lambda args
|
||
;; Accept EINVAL, which some old Linux versions might return.
|
||
(memv (system-error-errno args)
|
||
(list ENOTTY EINVAL)))))))
|
||
|
||
(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-assert "terminal-rows"
|
||
(> (terminal-rows) 0))
|
||
|
||
(test-assert "utmpx-entries"
|
||
(match (utmpx-entries)
|
||
(((? utmpx? entries) ...)
|
||
(every (lambda (entry)
|
||
(match (utmpx-user entry)
|
||
((? string?)
|
||
;; Ensure we have a valid PID for those entries where it
|
||
;; makes sense.
|
||
(or (not (memv (utmpx-login-type entry)
|
||
(list (login-type INIT_PROCESS)
|
||
(login-type LOGIN_PROCESS)
|
||
(login-type USER_PROCESS))))
|
||
(> (utmpx-pid entry) 0)))
|
||
(#f ;might be DEAD_PROCESS
|
||
#t)))
|
||
entries))))
|
||
|
||
(test-assert "read-utmpx, EOF"
|
||
(eof-object? (read-utmpx (%make-void-port "r"))))
|
||
|
||
(unless (access? "/var/run/utmpx" O_RDONLY)
|
||
(test-skip 1))
|
||
(test-assert "read-utmpx"
|
||
(let ((result (call-with-input-file "/var/run/utmpx" read-utmpx)))
|
||
(or (utmpx? result) (eof-object? result))))
|
||
|
||
(when (zero? (getuid))
|
||
(test-skip 1))
|
||
(test-equal "add-to-entropy-count"
|
||
EPERM
|
||
(call-with-output-file "/dev/urandom"
|
||
(lambda (port)
|
||
(catch 'system-error
|
||
(lambda ()
|
||
(add-to-entropy-count port 77)
|
||
#f)
|
||
(lambda args
|
||
(system-error-errno args))))))
|
||
|
||
(test-end)
|
||
|
||
(false-if-exception (delete-file temp-file))
|