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linux[4.2.5-1-ARCH][system[GNU C Library (GNU libc) stable release version 2.22, by Roland McGrath et al.]][path=/mnt/flashix/[unknown]]@[2015-12-14T16:11:13Z./nix/store/qf513g69n2gy4prf0yhgggwimyl8q7kd-fs_test]

Checked Trace
linux_spec@[/nix/store/qf513g69n2gy4prf0yhgggwimyl8q7kd-fs_test] sexp stdout stderr
Traced Execution stdout stderr
Script script

Combined Trace

1 # processing file 'adhoc_pwrite_tests-int.trace' ...
2 @type trace
3 # testing pwrite and write
4
5
6 # #############################################
7 # initialization
8 # #############################################
9
10 # empty and non-empty directories to write to
11 mkdir "/empty_dir" 0o777
12 Tau
13 RV_none
14 mkdir "/non_empty_dir" 0o777
15 Tau
16 RV_none
17
18 chdir "/non_empty_dir"
19 Tau
20 RV_none
21
22
23 # #############################################
24 # simple writes
25 # #############################################
26
27 # start on empty file and write something
28 open "f1.txt" [O_CREAT;O_RDWR] 0o666
29 Tau
30 RV_num(3)
31 write (FD 3) "0123456789" 10
32 Tau
33 RV_num(10)
34 close (FD 3)
35 Tau
36 RV_none
37
38 open "f1.txt" [O_RDONLY]
39 Tau
40 RV_num(3)
41 read! (FD 3) 100
42 Tau
43 RV_bytes("0123456789")
44 close (FD 3)
45 Tau
46 RV_none
47
48 # write even more stuff at the end
49 open "f1.txt" [O_APPEND;O_RDWR] 0o666
50 Tau
51 RV_num(3)
52 write (FD 3) "0123456789" 10
53 Tau
54 RV_num(10)
55 close (FD 3)
56 Tau
57 RV_none
58
59 open "f1.txt" [O_RDONLY]
60 Tau
61 RV_num(3)
62 read! (FD 3) 100
63 Tau
64 RV_bytes("01234567890123456789")
65 close (FD 3)
66 Tau
67 RV_none
68
69 # overwrite at begining
70 open "f1.txt" [O_RDWR] 0o666
71 Tau
72 RV_num(3)
73 write (FD 3) "XXX" 3
74 Tau
75 RV_num(3)
76 close (FD 3)
77 Tau
78 RV_none
79
80 open "f1.txt" [O_RDONLY]
81 Tau
82 RV_num(3)
83 read! (FD 3) 100
84 Tau
85 RV_bytes("XXX34567890123456789")
86 close (FD 3)
87 Tau
88 RV_none
89
90 # truncate file
91 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
92 Tau
93 RV_num(3)
94 write (FD 3) "0123456789" 10
95 Tau
96 RV_num(10)
97 close (FD 3)
98 Tau
99 RV_none
100
101 open "f1.txt" [O_RDONLY]
102 Tau
103 RV_num(3)
104 read! (FD 3) 100
105 Tau
106 RV_bytes("0123456789")
107 close (FD 3)
108 Tau
109 RV_none
110
111 # shorter size
112 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
113 Tau
114 RV_num(3)
115 write (FD 3) "0123456789" 5
116 Tau
117 RV_num(5)
118 close (FD 3)
119 Tau
120 RV_none
121
122 open "f1.txt" [O_RDONLY]
123 Tau
124 RV_num(3)
125 read! (FD 3) 100
126 Tau
127 RV_bytes("01234")
128 close (FD 3)
129 Tau
130 RV_none
131
132 # write 0
133 open "f1.txt" [O_RDWR]
134 Tau
135 RV_num(3)
136 write (FD 3) "9876543210" 0
137 Tau
138 RV_num(0)
139 close (FD 3)
140 Tau
141 RV_none
142
143 open "f1.txt" [O_RDONLY]
144 Tau
145 RV_num(3)
146 read! (FD 3) 100
147 Tau
148 RV_bytes("01234")
149 close (FD 3)
150 Tau
151 RV_none
152
153 # #############################################
154 # pwrite
155 # #############################################
156
157 # write with pwrite at arbitrary positions
158 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
159 Tau
160 RV_num(3)
161 write (FD 3) "0123456789" 10
162 Tau
163 RV_num(10)
164 pwrite (FD 3) "X" 1 4
165 Tau
166 RV_num(1)
167 pwrite (FD 3) "X" 1 6
168 Tau
169 RV_num(1)
170 pwrite (FD 3) "X" 1 8
171 Tau
172 RV_num(1)
173 write (FD 3) "0123456789" 10
174 Tau
175 RV_num(10)
176 close (FD 3)
177 Tau
178 RV_none
179
180 open "f1.txt" [O_RDONLY]
181 Tau
182 RV_num(3)
183 read! (FD 3) 100
184 Tau
185 RV_bytes("0123X5X7X90123456789")
186 close (FD 3)
187 Tau
188 RV_none
189
190
191 # pwrite after end of file
192 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
193 Tau
194 RV_num(3)
195 pwrite (FD 3) "XXX" 3 10
196 Tau
197 RV_num(3)
198 close (FD 3)
199 Tau
200 RV_none
201
202 open "f1.txt" [O_RDONLY]
203 Tau
204 RV_num(3)
205 read! (FD 3) 100
206 Tau
207 RV_bytes("\000\000\000\000\000\000\000\000\000\000XXX")
208 close (FD 3)
209 Tau
210 RV_none
211
212
213 # pwrite then write
214 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
215 Tau
216 RV_num(3)
217 pwrite (FD 3) "XXX" 3 10
218 Tau
219 RV_num(3)
220 write (FD 3) "01234" 5
221 Tau
222 RV_num(5)
223 close (FD 3)
224 Tau
225 RV_none
226
227 open "f1.txt" [O_RDONLY]
228 Tau
229 RV_num(3)
230 read! (FD 3) 100
231 Tau
232 RV_bytes("01234\000\000\000\000\000XXX")
233 close (FD 3)
234 Tau
235 RV_none
236
237
238
239 # #############################################
240 # lseek
241 # #############################################
242
243 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
244 Tau
245 RV_num(3)
246 write (FD 3) "0123456789" 10
247 Tau
248 RV_num(10)
249 lseek (FD 3) -3 SEEK_CUR
250 Tau
251 RV_num(7)
252 write (FD 3) "ABC" 3
253 Tau
254 RV_num(3)
255 pwrite (FD 3) "X" 1 4
256 Tau
257 RV_num(1)
258 lseek (FD 3) 2 SEEK_SET
259 Tau
260 RV_num(2)
261 write (FD 3) "Y" 1
262 Tau
263 RV_num(1)
264 lseek (FD 3) 0 SEEK_SET
265 Tau
266 RV_num(0)
267 read! (FD 3) 100
268 Tau
269 RV_bytes("01Y3X56ABC")
270 close (FD 3)
271 Tau
272 RV_none
273
274 # write after end adds 0s
275 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
276 Tau
277 RV_num(3)
278 write (FD 3) "0123456789" 10
279 Tau
280 RV_num(10)
281 lseek (FD 3) 5 SEEK_CUR
282 Tau
283 RV_num(15)
284 write (FD 3) "ABCDE" 5
285 Tau
286 RV_num(5)
287 lseek (FD 3) 0 SEEK_SET
288 Tau
289 RV_num(0)
290 read! (FD 3) 100
291 Tau
292 RV_bytes("0123456789\000\000\000\000\000ABCDE")
293 close (FD 3)
294 Tau
295 RV_none
296
297 # #############################################
298 # writes with different file-descriptors
299 # #############################################
300
301 # read/write is fine
302 open "f1.txt" [O_TRUNC;O_RDWR]
303 Tau
304 RV_num(3)
305 write (FD 3) "0123456789" 10
306 Tau
307 RV_num(10)
308 lseek (FD 3) 0 SEEK_SET
309 Tau
310 RV_num(0)
311 read! (FD 3) 100
312 Tau
313 RV_bytes("0123456789")
314 close (FD 3)
315 Tau
316 RV_none
317
318 # write_only is fine / truncate works
319 open "f1.txt" [O_TRUNC;O_WRONLY]
320 Tau
321 RV_num(3)
322 write (FD 3) "ABCDE" 5
323 Tau
324 RV_num(5)
325 close (FD 3)
326 Tau
327 RV_none
328 open "f1.txt" [O_RDONLY]
329 Tau
330 RV_num(3)
331 read! (FD 3) 100
332 Tau
333 RV_bytes("ABCDE")
334 close (FD 3)
335 Tau
336 RV_none
337
338 # write_only without truncate keeps old content, but overwrites it
339 open "f1.txt" [O_WRONLY]
340 Tau
341 RV_num(3)
342 write (FD 3) "012" 3
343 Tau
344 RV_num(3)
345 lseek (FD 3) 0 SEEK_SET
346 Tau
347 RV_num(0)
348 read (FD 3) 100
349 Tau
350 EBADF
351 close (FD 3)
352 Tau
353 RV_none
354
355 open "f1.txt" [O_RDONLY]
356 Tau
357 RV_num(3)
358 read! (FD 3) 100
359 Tau
360 RV_bytes("012DE")
361 close (FD 3)
362 Tau
363 RV_none
364
365 # append is adding at end
366 open "f1.txt" [O_APPEND;O_RDWR]
367 Tau
368 RV_num(3)
369 write (FD 3) "ABCDE" 5
370 Tau
371 RV_num(5)
372 lseek (FD 3) 0 SEEK_SET
373 Tau
374 RV_num(0)
375 read! (FD 3) 100
376 Tau
377 RV_bytes("012DEABCDE")
378 close (FD 3)
379 Tau
380 RV_none
381
382 # writing a read-only file fails
383 open "f1.txt" [O_RDONLY]
384 Tau
385 RV_num(3)
386 write (FD 3) "ABCDE" 5
387 Tau
388 EBADF
389 lseek (FD 3) 0 SEEK_SET
390 Tau
391 RV_num(0)
392 read (FD 3) 100
393 Tau
394 RV_bytes("012DEABCDE")
395 close (FD 3)
396 Tau
397 RV_none
398
399 # closed FD cannot be written to
400 write (FD 3) "ABCDE" 5
401 Tau
402 EBADF
403
404 # non existing FD can't be used
405 write (FD 300) "ABCDE" 5
406 Tau
407 EBADF
408
409
410 # #############################################
411 # writing to directories
412 # this is already prohibited
413 # by the open command
414 # #############################################
415
416 open "/non_empty_dir" [O_RDWR]
417 Tau
418 EISDIR
419 write (FD 3) "ABC" 3
420 Tau
421 EBADF
422 close (FD 3)
423 Tau
424 EBADF
425
426 open "/non_empty_dir" [O_RDWR]
427 Tau
428 EISDIR
429 # unspecified <http://pubs.opengroup.org/onlinepubs/7908799/xsh/write.html>
430 write (FD 3) "ABC" 0
431 Tau
432 RV_num(0)
THE SPEC ASSERTS THE STATE SET IS EMPTY
The spec permitted:
  • EBADF
expected error EBADF but got value RV_num(0)
433 close (FD 3)
434 Tau
435 EBADF
436
437 open "/non_empty_dir" [O_WRONLY]
438 Tau
439 EISDIR
440 write (FD 3) "ABC" 3
441 Tau
442 EBADF
443 close (FD 3)
444 Tau
445 EBADF
446
447 open "/non_empty_dir" [O_RDONLY]
448 Tau
449 RV_num(3)
450 write (FD 3) "ABC" 0
451 Tau
452 RV_num(0)
THE SPEC ASSERTS THE STATE SET IS EMPTY
The spec permitted:
  • EBADF
expected error EBADF but got value RV_num(0)
453 write (FD 3) "ABC" 3
454 Tau
455 EBADF
456 close (FD 3)
457 Tau
458 RV_none
459
460 # #############################################
461 # writing to symlinks
462 # #############################################
463 symlink "/non_empty_dir/target" "/non_empty_dir/symlink"
464 Tau
465 RV_none
466
467 open "/non_empty_dir/symlink" [O_WRONLY]
468 Tau
469 ENOENT
470 write (FD 3) "ABC" 1
471 Tau
472 EBADF
473 close (FD 3)
474 Tau
475 EBADF
476
477 readlink "/non_empty_dir/symlink"
478 Tau
479 RV_bytes("/non_empty_dir/target")
480
481 open "/non_empty_dir/symlink" [O_WRONLY]
482 Tau
483 ENOENT
484 # unspecified <http://pubs.opengroup.org/onlinepubs/7908799/xsh/write.html>
485 write (FD 3) "" 0
486 Tau
487 RV_num(0)
THE SPEC ASSERTS THE STATE SET IS EMPTY
The spec permitted:
  • EBADF
expected error EBADF but got value RV_num(0)
488 close (FD 3)
489 Tau
490 EBADF
491
492 readlink "/non_empty_dir/symlink"
493 Tau
494 RV_bytes("/non_empty_dir/target")
495
496 # #############################################
497 # pwriting deterministically
498 # #############################################
499
500 open "/file1" [O_CREAT;O_RDWR] 0o666
501 Tau
502 RV_num(3)
503 pwrite! (FD 3) "ABC" 3 0
504 Tau
505 RV_num(3)
506 close (FD 3)
507 Tau
508 RV_none
509
510 open "/file1" [O_APPEND;O_RDWR]
511 Tau
512 RV_num(3)
513 pwrite! (FD 3) "ABCDF" 5 0
514 Tau
515 RV_num(5)
516 close (FD 3)
517 Tau
518 RV_none
519
520
521
522 # #############################################
523 # writing 0 bytes to an unused fd
524 # #############################################
525
526 write (FD 99) "" 0
527 Tau
528 RV_num(0)
THE SPEC ASSERTS THE STATE SET IS EMPTY
The spec permitted:
  • EBADF
expected error EBADF but got value RV_num(0)
529
530
531
532 # #############################################
533 # writing 0 bytes past end of file is a no-op
534 # (thanks to Gidon Ernst)
535 # #############################################
536
537 # truncate file
538 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
539 Tau
540 RV_num(3)
541 # 99 is posn; file should remain 0 length
542 pwrite (FD 3) "0123456789" 0 99
543 Tau
544 RV_num(0)
545 close (FD 3)
546 Tau
547 RV_none
548
549 dump-result /
/ D 235309
/file1 F 235337 8 d0c544ca844b98e7788e733a24853c41000bf221
/empty_dir D 235314
/non_empty_dir D 235316
/non_empty_dir/f1.txt F 235318 0 da39a3ee5e6b4b0d3255bfef95601890afd80709
/non_empty_dir/symlink L /non_empty_dir/target
550
551
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