This source file includes following definitions.
- orig_freopen
- rpl_freopen
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22 #define _GL_ALREADY_INCLUDING_STDIO_H
23 #include <config.h>
24
25
26 #include <stdio.h>
27 #undef _GL_ALREADY_INCLUDING_STDIO_H
28
29 #include <errno.h>
30
31 static FILE *
32 orig_freopen (const char *filename, const char *mode, FILE *stream)
33 {
34 return freopen (filename, mode, stream);
35 }
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38
39
40 #include "stdio.h"
41
42 #include <fcntl.h>
43 #include <string.h>
44 #include <unistd.h>
45
46 FILE *
47 rpl_freopen (const char *filename, const char *mode, FILE *stream)
48 {
49 FILE *result;
50 #if defined _WIN32 && ! defined __CYGWIN__
51 char const *null_device = "NUL";
52 if (filename && strcmp (filename, "/dev/null") == 0)
53 filename = null_device;
54 #else
55 char const *null_device = "/dev/null";
56 #endif
57
58 #ifdef __KLIBC__
59 errno = 0;
60 #endif
61
62 result = orig_freopen (filename, mode, stream);
63
64 if (!result)
65 {
66 #ifdef __KLIBC__
67
68
69 if (!filename && !errno)
70 result = stream;
71 #endif
72 }
73 else if (filename)
74 {
75 int fd = fileno (result);
76 if (dup2 (fd, fd) < 0 && errno == EBADF)
77 {
78 int nullfd = open (null_device, O_RDONLY | O_CLOEXEC);
79 int err = 0;
80 if (nullfd != fd)
81 {
82 if (dup2 (nullfd, fd) < 0)
83 err = 1;
84 close (nullfd);
85 }
86 if (!err)
87 result = orig_freopen (filename, mode, result);
88 }
89 }
90
91 return result;
92 }