1 | #include <fcntl.h> |
2 | #include <stdio.h> |
3 | #include <string.h> |
4 | #include <unistd.h> |
5 | |
6 | static int fd; |
7 | static char *fname; |
8 | |
9 | |
10 | static void prepare (void); |
11 | #define PREPARE(argc, argv) prepare () |
12 | |
13 | |
14 | #define TEST_FUNCTION do_test () |
15 | static int do_test (void); |
16 | #include "../test-skeleton.c" |
17 | |
18 | |
19 | static void |
20 | prepare (void) |
21 | { |
22 | fd = create_temp_file (base: "wrewind." , filename: &fname); |
23 | if (fd == -1) |
24 | exit (3); |
25 | } |
26 | |
27 | |
28 | static int |
29 | do_test (void) |
30 | { |
31 | char buf[100]; |
32 | FILE *fp; |
33 | int result = 0; |
34 | |
35 | fp = fdopen (fd, "w" ); |
36 | if (fp == NULL) |
37 | { |
38 | puts (s: "cannot create file" ); |
39 | exit (1); |
40 | } |
41 | |
42 | if (fputs ("one\n" , fp) == EOF || fputs ("two\n" , fp) == EOF) |
43 | { |
44 | puts (s: "cannot create filec content" ); |
45 | exit (1); |
46 | } |
47 | |
48 | fclose (fp); |
49 | |
50 | fp = fopen (fname, "a+" ); |
51 | if (fp == NULL) |
52 | { |
53 | puts (s: "cannot fopen a+" ); |
54 | exit (1); |
55 | } |
56 | |
57 | if (fgets (s: buf, n: sizeof (buf), stream: fp) == NULL) |
58 | { |
59 | puts (s: "cannot read after fopen a+" ); |
60 | exit (1); |
61 | } |
62 | |
63 | if (strcmp (buf, "one\n" ) != 0) |
64 | { |
65 | puts (s: "read after fopen a+ produced wrong result" ); |
66 | result = 1; |
67 | } |
68 | |
69 | fclose (fp); |
70 | |
71 | fd = open (file: fname, O_RDWR); |
72 | if (fd == -1) |
73 | { |
74 | puts (s: "open failed" ); |
75 | exit (1); |
76 | } |
77 | |
78 | fp = fdopen (fd, "a+" ); |
79 | if (fp == NULL) |
80 | { |
81 | puts (s: "fopen after open failed" ); |
82 | exit (1); |
83 | } |
84 | |
85 | if (fgets (s: buf, n: sizeof (buf), stream: fp) == NULL) |
86 | { |
87 | puts (s: "cannot read after fdopen a+" ); |
88 | exit (1); |
89 | } |
90 | |
91 | if (strcmp (buf, "one\n" ) != 0) |
92 | { |
93 | puts (s: "read after fdopen a+ produced wrong result" ); |
94 | result = 1; |
95 | } |
96 | |
97 | fclose (fp); |
98 | |
99 | return result; |
100 | } |
101 | |