| 1 | /* Start reading the entries of a directory.
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| 2 | Copyright (C) 2006-2012 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software: you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 3 of the License, or
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| 7 | (at your option) any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | #include <config.h>
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| 18 |
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| 19 | /* Specification. */
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| 20 | #include <dirent.h>
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| 21 |
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| 22 | #include <errno.h>
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| 23 | #include <stddef.h>
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| 24 |
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| 25 | #if HAVE_OPENDIR
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| 26 |
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| 27 | /* Override opendir(), to keep track of the open file descriptors.
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| 28 | Needed because there is a function dirfd(). */
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| 29 |
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| 30 | #else
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| 31 |
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| 32 | # include <stdlib.h>
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| 33 |
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| 34 | # include "dirent-private.h"
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| 35 | # include "filename.h"
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| 36 |
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| 37 | #endif
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| 38 |
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| 39 | #if REPLACE_FCHDIR
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| 40 | # include <unistd.h>
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| 41 | #endif
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| 42 |
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| 43 | DIR *
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| 44 | opendir (const char *dir_name)
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| 45 | {
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| 46 | #if HAVE_OPENDIR
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| 47 | # undef opendir
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| 48 | DIR *dirp;
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| 49 |
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| 50 | dirp = opendir (dir_name);
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| 51 | if (dirp == NULL)
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| 52 | return NULL;
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| 53 |
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| 54 | #else
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| 55 |
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| 56 | char dir_name_mask[MAX_PATH + 1 + 1 + 1];
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| 57 | int status;
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| 58 | HANDLE current;
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| 59 | WIN32_FIND_DATA entry;
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| 60 | struct gl_directory *dirp;
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| 61 |
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| 62 | if (dir_name[0] == '\0')
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| 63 | {
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| 64 | errno = ENOENT;
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| 65 | return NULL;
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| 66 | }
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| 67 |
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| 68 | /* Make the dir_name absolute, so that we continue reading the same
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| 69 | directory if the current directory changed between this opendir()
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| 70 | call and a subsequent rewinddir() call. */
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| 71 | if (!GetFullPathName (dir_name, MAX_PATH, dir_name_mask, NULL))
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| 72 | {
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| 73 | errno = EINVAL;
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| 74 | return NULL;
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| 75 | }
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| 76 |
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| 77 | /* Append the mask.
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| 78 | "*" and "*.*" appear to be equivalent. */
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| 79 | {
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| 80 | char *p;
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| 81 |
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| 82 | p = dir_name_mask + strlen (dir_name_mask);
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| 83 | if (p > dir_name_mask && !ISSLASH (p[-1]))
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| 84 | *p++ = '\\';
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| 85 | *p++ = '*';
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| 86 | *p = '\0';
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| 87 | }
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| 88 |
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| 89 | /* Start searching the directory. */
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| 90 | status = -1;
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| 91 | current = FindFirstFile (dir_name_mask, &entry);
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| 92 | if (current == INVALID_HANDLE_VALUE)
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| 93 | {
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| 94 | switch (GetLastError ())
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| 95 | {
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| 96 | case ERROR_FILE_NOT_FOUND:
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| 97 | status = -2;
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| 98 | break;
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| 99 | case ERROR_PATH_NOT_FOUND:
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| 100 | errno = ENOENT;
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| 101 | return NULL;
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| 102 | case ERROR_DIRECTORY:
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| 103 | errno = ENOTDIR;
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| 104 | return NULL;
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| 105 | case ERROR_ACCESS_DENIED:
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| 106 | errno = EACCES;
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| 107 | return NULL;
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| 108 | default:
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| 109 | errno = EIO;
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| 110 | return NULL;
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| 111 | }
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| 112 | }
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| 113 |
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| 114 | /* Allocate the result. */
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| 115 | dirp =
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| 116 | (struct gl_directory *)
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| 117 | malloc (offsetof (struct gl_directory, dir_name_mask[0])
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| 118 | + strlen (dir_name_mask) + 1);
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| 119 | if (dirp == NULL)
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| 120 | {
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| 121 | if (current != INVALID_HANDLE_VALUE)
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| 122 | FindClose (current);
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| 123 | errno = ENOMEM;
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| 124 | return NULL;
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| 125 | }
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| 126 | dirp->status = status;
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| 127 | dirp->current = current;
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| 128 | if (status == -1)
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| 129 | memcpy (&dirp->entry, &entry, sizeof (WIN32_FIND_DATA));
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| 130 | strcpy (dirp->dir_name_mask, dir_name_mask);
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| 131 |
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| 132 | #endif
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| 133 |
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| 134 | #if REPLACE_FCHDIR
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| 135 | {
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| 136 | int fd = dirfd (dirp);
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| 137 | if (0 <= fd && _gl_register_fd (fd, dir_name) != fd)
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| 138 | {
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| 139 | int saved_errno = errno;
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| 140 | closedir (dirp);
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| 141 | errno = saved_errno;
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| 142 | return NULL;
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| 143 | }
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| 144 | }
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| 145 | #endif
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| 146 |
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| 147 | return dirp;
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| 148 | }
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