This source file includes following definitions.
- _gl_register_dirp_fd
- _gl_unregister_dirp_fd
- dirfd
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20 #include <config.h>
21
22 #include <dirent.h>
23 #include <errno.h>
24
25 #ifdef __KLIBC__
26 # include <stdlib.h>
27 # include <io.h>
28
29 static struct dirp_fd_list
30 {
31 DIR *dirp;
32 int fd;
33 struct dirp_fd_list *next;
34 } *dirp_fd_start = NULL;
35
36
37 int
38 _gl_register_dirp_fd (int fd, DIR *dirp)
39 {
40 struct dirp_fd_list *new_dirp_fd = malloc (sizeof *new_dirp_fd);
41 if (!new_dirp_fd)
42 return -1;
43
44 new_dirp_fd->dirp = dirp;
45 new_dirp_fd->fd = fd;
46 new_dirp_fd->next = dirp_fd_start;
47
48 dirp_fd_start = new_dirp_fd;
49
50 return 0;
51 }
52
53
54 void
55 _gl_unregister_dirp_fd (int fd)
56 {
57 struct dirp_fd_list *dirp_fd;
58 struct dirp_fd_list *dirp_fd_prev;
59
60 for (dirp_fd_prev = NULL, dirp_fd = dirp_fd_start; dirp_fd;
61 dirp_fd_prev = dirp_fd, dirp_fd = dirp_fd->next)
62 {
63 if (dirp_fd->fd == fd)
64 {
65 if (dirp_fd_prev)
66 dirp_fd_prev->next = dirp_fd->next;
67 else
68 dirp_fd_start = dirp_fd_start->next;
69
70 close (fd);
71 free (dirp_fd);
72 break;
73 }
74 }
75 }
76 #endif
77
78 int
79 dirfd (DIR *dir_p)
80 {
81 int fd = DIR_TO_FD (dir_p);
82 if (fd == -1)
83 #ifndef __KLIBC__
84 errno = ENOTSUP;
85 #else
86 {
87 struct dirp_fd_list *dirp_fd;
88
89 for (dirp_fd = dirp_fd_start; dirp_fd; dirp_fd = dirp_fd->next)
90 if (dirp_fd->dirp == dir_p)
91 return dirp_fd->fd;
92
93 errno = EINVAL;
94 }
95 #endif
96
97 return fd;
98 }