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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_open_creat-int.trace' ...
2 @type trace
3
4 # #############################################
5 # O_CREAT
6 # #############################################
7
8 # create without write flag is fine. It create
9 # a file (if it does not exist before), but
10 # we can only read from it
11 open "f1.txt" [O_RDONLY;O_CREAT] 0o644
12 Tau
13 RV_num(3)
14 write (FD 3) "ABCDE" 5
15 Tau
16 EBADF
17 read (FD 3) 100
18 Tau
19 RV_bytes("")
20 close (FD 3)
21 Tau
22 RV_none
23
24 open "f2.txt" [O_RDONLY;O_CREAT] 0o644
25 Tau
26 RV_num(3)
27 write (FD 3) "ABCDE" 5
28 Tau
29 EBADF
30 pread (FD 3) 100 0
31 Tau
32 RV_bytes("")
33 close (FD 3)
34 Tau
35 RV_none
36 unlink "f2.txt"
37 Tau
38 RV_none
39
40 # if O_EXCL is given the file must not exist
41 open "f1.txt" [O_EXCL;O_CREAT;O_RDWR] 0o644
42 Tau
43 EEXIST
44 close (FD 3)
45 Tau
46 EBADF
47
48 open "f2.txt" [O_EXCL;O_CREAT;O_RDWR] 0o644
49 Tau
50 RV_num(3)
51 write (FD 3) "ABCDE" 5
52 Tau
53 RV_num(5)
54 pread (FD 3) 100 0
55 Tau
56 RV_bytes("ABCDE")
57 close (FD 3)
58 Tau
59 RV_none
60 unlink "f2.txt"
61 Tau
62 RV_none
63
64 # if O_EXCL but not O_CREATE is set, the result is undefined
65 open "f1.txt" [O_EXCL;O_RDWR] 0o777
66 Tau
67 RV_num(3)
68 close (FD 3)
69 Tau
70 RV_none
71
72 # to create a file, we need write access to the parent dir
73
74 mkdir "d1" 0o555
75 Tau
76 RV_none
77
78 open_close "/d1/f3.txt" [O_CREAT;O_WRONLY] 0o644
79 Tau
80 RV_none
81
82 chmod "/d1" 0o755
83 Tau
84 RV_none
85 open "/d1/f3.txt" [O_CREAT;O_RDWR] 0o644
86 Tau
87 RV_num(3)
88 write (FD 3) "ABCDE" 5
89 Tau
90 RV_num(5)
91 pread (FD 3) 100 0
92 Tau
93 RV_bytes("ABCDE")
94 close (FD 3)
95 Tau
96 RV_none
97 unlink "/d1/f3.txt"
98 Tau
99 RV_none
100
101 # the file-permissions of a newly created file don't matter
102 open "/d1/f3.txt" [O_CREAT;O_RDWR] 0o444
103 Tau
104 RV_num(3)
105 write (FD 3) "ABCDE" 5
106 Tau
107 RV_num(5)
108 pread (FD 3) 100 0
109 Tau
110 RV_bytes("ABCDE")
111 close (FD 3)
112 Tau
113 RV_none
114
115 open "/d1/f3.txt" [O_RDWR]
116 Tau
117 RV_num(3)
118 close (FD 3)
119 Tau
120 RV_none
121
122 open "/d1/f3.txt" [O_RDONLY]
123 Tau
124 RV_num(3)
125 read (FD 3) 100
126 Tau
127 RV_bytes("ABCDE")
128 close (FD 3)
129 Tau
130 RV_none
131
132 # open does not change the permissions on existing files
133 open "/d1/f3.txt" [O_RDONLY;O_CREAT] 0o000
134 Tau
135 RV_num(3)
136 pread (FD 3) 100 0
137 Tau
138 RV_bytes("ABCDE")
139 close (FD 3)
140 Tau
141 RV_none
142
143 open "/d1/f3.txt" [O_RDONLY]
144 Tau
145 RV_num(3)
146 read (FD 3) 100
147 Tau
148 RV_bytes("ABCDE")
149 close (FD 3)
150 Tau
151 RV_none
152 unlink "/d1/f3.txt"
153 Tau
154 RV_none
155
156 # not even read permission is needed on newly created files
157 open "/d1/f3.txt" [O_RDONLY;O_CREAT] 0o000
158 Tau
159 RV_num(3)
160 pread (FD 3) 100 0
161 Tau
162 RV_bytes("")
163 close (FD 3)
164 Tau
165 RV_none
166
167 open "/d1/f3.txt" [O_RDONLY]
168 Tau
169 RV_num(3)
170 read (FD 3) 100
171 Tau
172 RV_bytes("")
173 close (FD 3)
174 Tau
175 RV_none
176 unlink "/d1/f3.txt"
177 Tau
178 RV_none
179
180
181 # O_CREAT flag only creates files not the dirs in path
182 open "/no-such-dir/" [O_RDONLY;O_CREAT] 0o644
183 Tau
184 EISDIR
185 open "/no-such-dir/file.txt" [O_RDONLY;O_CREAT] 0o644
186 Tau
187 ENOENT
188 close (FD 3)
189 Tau
190 EBADF
191
192
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