summaryrefslogtreecommitdiff
path: root/tests/syscalls.scm
blob: 3b71cd7b1c0a38cbd2328738f460229fc8263a15 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015 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 (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"))

(unless (file-exists? (user-namespace (getpid)))
  (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 (file-exists? (user-namespace (getpid)))
  (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 (file-exists? (user-namespace (getpid)))
  (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-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-end)


(exit (= (test-runner-fail-count (test-runner-current)) 0))