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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_pread_tests-int.trace' ...
2 @type trace
3 # adhoc_pread_tests2: adhoc tests to check behaviour of read in various situations
4
5
6 # #############################################
7 # initialization
8 # #############################################
9
10 # empty and non-empty directories to read from
11 mkdir "/empty_dir" 0o777
12 Tau
13 RV_none
14 mkdir "/non_empty_dir" 0o777
15 Tau
16 RV_none
17
18 # create files with different contents in the non-empty directory
19 chdir "/non_empty_dir"
20 Tau
21 RV_none
22
23 # "f1.txt" is empty
24 open_close "f1.txt" [O_CREAT;O_RDWR] 0o666
25 Tau
26 RV_none
27
28 # "f2.txt" contains some short text
29 open "f2.txt" [O_CREAT;O_RDWR] 0o666
30 Tau
31 RV_num(3)
32 write! (FD 3) "Lorem ipsum dolor sit a" 23
33 Tau
34 RV_num(23)
35 close (FD 3)
36 Tau
37 RV_none
38
39 # "f3.txt" contains all kinds of strange characters
40 open "f3.txt" [O_CREAT;O_RDWR] 0o666
41 Tau
42 RV_num(3)
43 write! (FD 3) "\"-#@/\000\001\001\243\b" 10
44 Tau
45 RV_num(10)
46 close (FD 3)
47 Tau
48 RV_none
49
50
51 # #############################################
52 # read on an empty file
53 # #############################################
54
55 # read nothing
56 open "f1.txt" [O_RDONLY]
57 Tau
58 RV_num(3)
59 pread (FD 3) 0 0
60 Tau
61 RV_bytes("")
62 close (FD 3)
63 Tau
64 RV_none
65
66 # read 1 char beyond end
67 open "f1.txt" [O_RDONLY]
68 Tau
69 RV_num(3)
70 pread (FD 3) 1 0
71 Tau
72 RV_bytes("")
73 close (FD 3)
74 Tau
75 RV_none
76
77 # read 1 char after seeking beyond end
78 open "f1.txt" [O_RDONLY]
79 Tau
80 RV_num(3)
81 pread (FD 3) 1 100
82 Tau
83 RV_bytes("")
84 close (FD 3)
85 Tau
86 RV_none
87
88 # read with negative offset
89 open "f1.txt" [O_RDONLY]
90 Tau
91 RV_num(3)
92 pread (FD 3) 1 -100
93 Tau
94 EINVAL
95 close (FD 3)
96 Tau
97 RV_none
98
99
100
101 # #############################################
102 # read on a non-empty file
103 # #############################################
104
105 # "f2.txt" is 23 bytes long
106
107 # pread 0 chars
108 open "f2.txt" [O_RDONLY]
109 Tau
110 RV_num(3)
111 pread (FD 3) 0 0
112 Tau
113 RV_bytes("")
114 close (FD 3)
115 Tau
116 RV_none
117
118 # read 0 chars
119 open "f2.txt" [O_RDONLY]
120 Tau
121 RV_num(3)
122 read (FD 3) 0
123 Tau
124 RV_bytes("")
125 close (FD 3)
126 Tau
127 RV_none
128
129 # pread 2 chars
130 open "f2.txt" [O_RDONLY]
131 Tau
132 RV_num(3)
133 pread (FD 3) 2 0
134 Tau
135 RV_bytes("Lo")
136 close (FD 3)
137 Tau
138 RV_none
139
140 # read 2 chars
141 open "f2.txt" [O_RDONLY]
142 Tau
143 RV_num(3)
144 read (FD 3) 2
145 Tau
146 RV_bytes("Lo")
147 close (FD 3)
148 Tau
149 RV_none
150
151 # pread 2 chars with offset 5
152 open "f2.txt" [O_RDONLY]
153 Tau
154 RV_num(3)
155 pread (FD 3) 2 5
156 Tau
157 RV_bytes(" i")
158 close (FD 3)
159 Tau
160 RV_none
161
162 # read 2 chars and then 3, preads don't influence each other
163 open "f2.txt" [O_RDONLY]
164 Tau
165 RV_num(3)
166 pread (FD 3) 2 0
167 Tau
168 RV_bytes("Lo")
169 pread (FD 3) 3 0
170 Tau
171 RV_bytes("Lor")
172 close (FD 3)
173 Tau
174 RV_none
175
176 # read 2 chars and then 3, reads influence each other
177 open "f2.txt" [O_RDONLY]
178 Tau
179 RV_num(3)
180 read (FD 3) 2
181 Tau
182 RV_bytes("Lo")
183 read (FD 3) 3
184 Tau
185 RV_bytes("rem")
186 close (FD 3)
187 Tau
188 RV_none
189
190 # pread over end of file
191 open "f2.txt" [O_RDONLY]
192 Tau
193 RV_num(3)
194 pread (FD 3) 100 0
195 Tau
196 RV_bytes("Lorem ipsum dolor sit a")
197 close (FD 3)
198 Tau
199 RV_none
200
201 # read over end of file
202 open "f2.txt" [O_RDONLY]
203 Tau
204 RV_num(3)
205 read (FD 3) 100
206 Tau
207 RV_bytes("Lorem ipsum dolor sit a")
208 close (FD 3)
209 Tau
210 RV_none
211
212 # pread just after end
213 open "f2.txt" [O_RDONLY]
214 Tau
215 RV_num(3)
216 pread (FD 3) 1 23
217 Tau
218 RV_bytes("")
219 close (FD 3)
220 Tau
221 RV_none
222
223 # pread far beyond end
224 open "f2.txt" [O_RDONLY]
225 Tau
226 RV_num(3)
227 pread (FD 3) 1 100
228 Tau
229 RV_bytes("")
230 close (FD 3)
231 Tau
232 RV_none
233
234 # pread over end
235 open "f2.txt" [O_RDONLY]
236 Tau
237 RV_num(3)
238 pread (FD 3) 5 20
239 Tau
240 RV_bytes("t a")
241 close (FD 3)
242 Tau
243 RV_none
244
245 # pread with negative offset
246 open "f2.txt" [O_RDONLY]
247 Tau
248 RV_num(3)
249 pread (FD 3) 1 -100
250 Tau
251 EINVAL
252 close (FD 3)
253 Tau
254 RV_none
255
256 # multiple preads don't influence each other or reads
257 open "f2.txt" [O_RDONLY]
258 Tau
259 RV_num(3)
260 read (FD 3) 2
261 Tau
262 RV_bytes("Lo")
263 pread (FD 3) 5 10
264 Tau
265 RV_bytes("m dol")
266 read (FD 3) 3
267 Tau
268 RV_bytes("rem")
269 pread (FD 3) 5 2
270 Tau
271 RV_bytes("rem i")
272 read (FD 3) 2
273 Tau
274 RV_bytes(" i")
275 close (FD 3)
276 Tau
277 RV_none
278
279 # read is influenced by seek
280 open "f2.txt" [O_RDONLY]
281 Tau
282 RV_num(3)
283 lseek (FD 3) 6 SEEK_SET
284 Tau
285 RV_num(6)
286 read (FD 3) 5
287 Tau
288 RV_bytes("ipsum")
289 close (FD 3)
290 Tau
291 RV_none
292
293 # pread is not influenced by seek
294 open "f2.txt" [O_RDONLY]
295 Tau
296 RV_num(3)
297 lseek (FD 3) 7 SEEK_SET
298 Tau
299 RV_num(7)
300 pread (FD 3) 5 6
301 Tau
302 RV_bytes("ipsum")
303 close (FD 3)
304 Tau
305 RV_none
306
307 # #############################################
308 # test reading of special chars
309 # #############################################
310
311 open "f3.txt" [O_RDONLY]
312 Tau
313 RV_num(3)
314 read (FD 3) 100
315 Tau
316 RV_bytes("\"-#@/\000\001\001\243\b")
317 close (FD 3)
318 Tau
319 RV_none
320
321
322 # #############################################
323 # reading from file-descriptors open for
324 # different modes
325 # #############################################
326
327 open "f2.txt" [O_RDONLY]
328 Tau
329 RV_num(3)
330 read (FD 3) 100
331 Tau
332 RV_bytes("Lorem ipsum dolor sit a")
333 close (FD 3)
334 Tau
335 RV_none
336
337 open "f2.txt" [O_WRONLY]
338 Tau
339 RV_num(3)
340 read (FD 3) 100
341 Tau
342 EBADF
343 close (FD 3)
344 Tau
345 RV_none
346
347 open "f2.txt" [O_RDWR]
348 Tau
349 RV_num(3)
350 read (FD 3) 100
351 Tau
352 RV_bytes("Lorem ipsum dolor sit a")
353 close (FD 3)
354 Tau
355 RV_none
356
357 # open a descriptor, remove permission on file
358 # and then read. Since descriptor is open
359 # that should be fine, but opening again is not
360 open "f2.txt" [O_RDONLY]
361 Tau
362 RV_num(3)
363 chmod "f2.txt" 0o000
364 Tau
365 RV_none
366 read (FD 3) 100
367 Tau
368 RV_bytes("Lorem ipsum dolor sit a")
369 close (FD 3)
370 Tau
371 RV_none
372
373 open "f2.txt" [O_RDONLY]
374 Tau
375 RV_num(3)
376 read (FD 3) 100
377 Tau
378 RV_bytes("Lorem ipsum dolor sit a")
379 close (FD 3)
380 Tau
381 RV_none
382
383 chmod "f2.txt" 0o666
384 Tau
385 RV_none
386 open "f2.txt" [O_RDONLY]
387 Tau
388 RV_num(3)
389 read (FD 3) 100
390 Tau
391 RV_bytes("Lorem ipsum dolor sit a")
392 close (FD 3)
393 Tau
394 RV_none
395
396 # #############################################
397 # read on directories
398 # #############################################
399
400 open "/empty_dir" [O_RDONLY]
401 Tau
402 RV_num(3)
403 pread (FD 3) 0 0
404 Tau
405 EISDIR
406 pread (FD 3) 1 0
407 Tau
408 EISDIR
409 pread (FD 3) 1 1
410 Tau
411 EISDIR
412 read (FD 3) 0
413 Tau
414 EISDIR
415 read (FD 3) 1
416 Tau
417 EISDIR
418 read (FD 3) 1
419 Tau
420 EISDIR
421 close (FD 3)
422 Tau
423 RV_none
424
425 open "/non_empty_dir" [O_RDONLY]
426 Tau
427 RV_num(3)
428 pread (FD 3) 0 0
429 Tau
430 EISDIR
431 pread (FD 3) 1 0
432 Tau
433 EISDIR
434 pread (FD 3) 1 1
435 Tau
436 EISDIR
437 read (FD 3) 0
438 Tau
439 EISDIR
440 read (FD 3) 1
441 Tau
442 EISDIR
443 read (FD 3) 1
444 Tau
445 EISDIR
446 close (FD 3)
447 Tau
448 RV_none
449
450
451 # #############################################
452 # finished :-)
453 # #############################################
454
455
456
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