1 | /* Copyright (C) 1991-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <stdio.h> |
20 | #include <stdlib.h> |
21 | #include <string.h> |
22 | |
23 | #include <support/xstdio.h> |
24 | |
25 | int |
26 | main (int argc, char **argv) |
27 | { |
28 | static const char hello[] = "Hello, world.\n" ; |
29 | static const char replace[] = "Hewwo, world.\n" ; |
30 | static const size_t replace_from = 2, replace_to = 4; |
31 | char filename[FILENAME_MAX]; |
32 | char *name = strrchr (*argv, '/'); |
33 | char buf[BUFSIZ]; |
34 | FILE *f; |
35 | int lose = 0; |
36 | |
37 | if (name != NULL) |
38 | ++name; |
39 | else |
40 | name = *argv; |
41 | |
42 | (void) sprintf (filename, OBJPFX "%s.test" , name); |
43 | |
44 | f = fopen (filename, "w+" ); |
45 | if (f == NULL) |
46 | { |
47 | perror (filename); |
48 | exit (1); |
49 | } |
50 | |
51 | (void) fputs (hello, f); |
52 | rewind (f); |
53 | xfgets (s: buf, size: sizeof (buf), stream: f); |
54 | rewind (f); |
55 | (void) fputs (buf, f); |
56 | rewind (f); |
57 | { |
58 | size_t i; |
59 | for (i = 0; i < replace_from; ++i) |
60 | { |
61 | int c = getc (stream: f); |
62 | if (c == EOF) |
63 | { |
64 | printf (format: "EOF at %Zu.\n" , i); |
65 | lose = 1; |
66 | break; |
67 | } |
68 | else if (c != hello[i]) |
69 | { |
70 | printf (format: "Got '%c' instead of '%c' at %Zu.\n" , |
71 | (unsigned char) c, hello[i], i); |
72 | lose = 1; |
73 | break; |
74 | } |
75 | } |
76 | } |
77 | |
78 | { |
79 | long int where = ftell (stream: f); |
80 | if (where == (long int) replace_from) |
81 | { |
82 | size_t i; |
83 | for (i = replace_from; i < replace_to; ++i) |
84 | if (putc(c: replace[i], stream: f) == EOF) |
85 | { |
86 | printf (format: "putc('%c') got %s at %Zu.\n" , |
87 | replace[i], strerror (errno), i); |
88 | lose = 1; |
89 | break; |
90 | } |
91 | } |
92 | else if (where == -1L) |
93 | { |
94 | printf (format: "ftell got %s (should be at %Zu).\n" , |
95 | strerror (errno), replace_from); |
96 | lose = 1; |
97 | } |
98 | else |
99 | { |
100 | printf (format: "ftell returns %lu; should be %Zu.\n" , where, replace_from); |
101 | lose = 1; |
102 | } |
103 | } |
104 | |
105 | if (!lose) |
106 | { |
107 | rewind (f); |
108 | xfgets (s: buf, size: sizeof (buf), stream: f); |
109 | if (strcmp (buf, replace)) |
110 | { |
111 | printf (format: "Read \"%s\" instead of \"%s\".\n" , buf, replace); |
112 | lose = 1; |
113 | } |
114 | } |
115 | |
116 | if (lose) |
117 | printf (format: "Test FAILED! Losing file is \"%s\".\n" , filename); |
118 | else |
119 | { |
120 | (void) remove (filename); |
121 | puts (s: "Test succeeded." ); |
122 | } |
123 | |
124 | return lose ? EXIT_FAILURE : EXIT_SUCCESS; |
125 | } |
126 | |