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linux[3.13.0-29-generic][system[GNU C Library (GNU libc) stable release version 2.21, by Roland McGrath et al.]][ext4_loop[mke2fs 1.42.9 (4-Feb-2014)]]@[2015-07-24T13:23:26Z./nix/store/fxisrpncjn4cxxwnq2lvilriqx63s9k9-fs_test]

Checked Trace
linux_spec@[/nix/store/fxisrpncjn4cxxwnq2lvilriqx63s9k9-fs_test] sexp stdout stderr
Traced Execution stdout stderr
Script script

Combined Trace

1 # processing file 'adhoc_lseek_tests-int.trace' ...
2 @type trace
3 # Tests for lseek
4
5
6 # #############################################
7 # reads combined with lseek
8 # #############################################
9
10 # initialise a file with some text
11 open "f1.txt" [O_TRUNC;O_CREAT;O_WRONLY] 0o666
12 Tau
13 RV_num(3)
14 write! (FD 3) "0123456789" 10
15 Tau
16 RV_num(10)
17 close (FD 3)
18 Tau
19 RV_none
20
21 open "f1.txt" [O_RDONLY]
22 Tau
23 RV_num(3)
24
25 # read 2 bytes and then 2 again
26 read (FD 3) 2
27 Tau
28 RV_bytes("01")
29 read (FD 3) 2
30 Tau
31 RV_bytes("23")
32
33 # jump back to beginning
34 lseek (FD 3) 0 SEEK_SET
35 Tau
36 RV_num(0)
37 read (FD 3) 2
38 Tau
39 RV_bytes("01")
40
41 # jump to absolute position 4
42 lseek (FD 3) 4 SEEK_SET
43 Tau
44 RV_num(4)
45 read (FD 3) 2
46 Tau
47 RV_bytes("45")
48
49 # jump after end
50 lseek (FD 3) 5 SEEK_END
51 Tau
52 RV_num(15)
53 read (FD 3) 2
54 Tau
55 RV_bytes("")
56
57 # jump after end
58 lseek (FD 3) 5 SEEK_END
59 Tau
60 RV_num(15)
61 read (FD 3) 2
62 Tau
63 RV_bytes("")
64
65 # jump 2 before end
66 lseek (FD 3) -2 SEEK_END
67 Tau
68 RV_num(8)
69 read (FD 3) 2
70 Tau
71 RV_bytes("89")
72
73 # 2 back and try again
74 lseek (FD 3) -2 SEEK_CUR
75 Tau
76 RV_num(8)
77 read (FD 3) 2
78 Tau
79 RV_bytes("89")
80
81 # jump just to zero
82 lseek (FD 3) -10 SEEK_CUR
83 Tau
84 RV_num(0)
85 read (FD 3) 2
86 Tau
87 RV_bytes("01")
88
89 # jump too far back (negative resulting offset)
90 lseek (FD 3) -10 SEEK_CUR
91 Tau
92 EINVAL
93 read (FD 3) 2
94 Tau
95 RV_bytes("23")
96
97 # use wrong whence
98 lseek (FD 3) 0 5
99 Tau
100 EINVAL
101 read (FD 3) 2
102 Tau
103 RV_bytes("45")
104
105 # check position
106 lseek (FD 3) 0 SEEK_CUR
107 Tau
108 RV_num(6)
109 lseek (FD 3) 0 SEEK_CUR
110 Tau
111 RV_num(6)
112
113 close (FD 3)
114 Tau
115 RV_none
116
117 # use closed file-descriptor
118 lseek (FD 3) 0 SEEK_CUR
119 Tau
120 EBADF
121
122 # use non-existing file-descriptor
123 lseek (FD 4) 0 SEEK_CUR
124 Tau
125 EBADF
126
127 # use non-existing file-descriptor and wrong whence
128 lseek (FD 4) 0 5
129 Tau
130 EBADF
131
132
133 # #############################################
134 # write and lseek
135 # #############################################
136
137 # jump after end of file should do nothing by itself
138 open "f1.txt" [O_TRUNC;O_WRONLY] 0o666
139 Tau
140 RV_num(3)
141 lseek (FD 3) 5 SEEK_SET
142 Tau
143 RV_num(5)
144 close (FD 3)
145 Tau
146 RV_none
147
148 open "f1.txt" [O_RDONLY]
149 Tau
150 RV_num(3)
151 read! (FD 3) 100
152 Tau
153 RV_bytes("")
154 close (FD 3)
155 Tau
156 RV_none
157
158
159 # jump after end of file, then write adds 0s
160 open "f1.txt" [O_TRUNC;O_WRONLY] 0o666
161 Tau
162 RV_num(3)
163 lseek (FD 3) 5 SEEK_SET
164 Tau
165 RV_num(5)
166 write (FD 3) "0123456789" 10
167 Tau
168 RV_num(10)
169 close (FD 3)
170 Tau
171 RV_none
172
173 open "f1.txt" [O_RDONLY]
174 Tau
175 RV_num(3)
176 read! (FD 3) 100
177 Tau
178 RV_bytes("\000\000\000\000\0000123456789")
179 close (FD 3)
180 Tau
181 RV_none
182
183
184 # write then jump back and write, jump back, read
185 open "f1.txt" [O_TRUNC;O_RDWR] 0o666
186 Tau
187 RV_num(3)
188 write (FD 3) "0123456789" 10
189 Tau
190 RV_num(10)
191 lseek (FD 3) -2 SEEK_CUR
192 Tau
193 RV_num(8)
194 write (FD 3) "XX" 2
195 Tau
196 RV_num(2)
197 lseek (FD 3) -6 SEEK_CUR
198 Tau
199 RV_num(4)
200 read (FD 3) 2
201 Tau
202 RV_bytes("45")
203 write (FD 3) "YY" 2
204 Tau
205 RV_num(2)
206 close (FD 3)
207 Tau
208 RV_none
209
210 open "f1.txt" [O_RDONLY]
211 Tau
212 RV_num(3)
213 read! (FD 3) 100
214 Tau
215 RV_bytes("012345YYXX")
216 close (FD 3)
217 Tau
218 RV_none
219
220
221 # #############################################
222 # lseek on dirs is not properly supported and
223 # therefore not tested carefully
224 # #############################################
225
226 mkdir "d1" 0o777
227 Tau
228 RV_none
229 open_close "d1/f1.txt" [O_CREAT;O_WRONLY] 0o666
230 Tau
231 RV_none
232 open_close "d1/f2.txt" [O_CREAT;O_WRONLY] 0o666
233 Tau
234 RV_none
235 open_close "d1/f3.txt" [O_CREAT;O_WRONLY] 0o666
236 Tau
237 RV_none
238
239
240 open "d1" [O_RDONLY]
241 Tau
242 RV_num(3)
243 lseek (FD 3) 0 SEEK_CUR
244 Tau
245 RV_num(0)
246 read (FD 3) 10
247 Tau
248 EISDIR
249
250 lseek (FD 3) 4 SEEK_CUR
251 Tau
252 RV_num(4)
253 read (FD 3) 10
254 Tau
255 EISDIR
256
257 # the following fail with a oveflow
258 lseek (FD 3) 0 SEEK_END
259 Tau
260 EOVERFLOW
261 lseek (FD 3) -2000 SEEK_END
262 Tau
263 EOVERFLOW
264
265 lseek (FD 3) 0 SEEK_SET
266 Tau
267 RV_num(0)
268 read (FD 3) 10
269 Tau
270 EISDIR
271
272 lseek (FD 3) 10 SEEK_SET
273 Tau
274 RV_num(10)
275 read (FD 3) 10
276 Tau
277 EISDIR
278
279 close (FD 3)
280 Tau
281 RV_none
282
283
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