2 * Copyright © 2000 Keith Packard
3 * Copyright © 2005 Patrick Lam
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of the author(s) not be used in
10 * advertising or publicity pertaining to distribution of the software without
11 * specific, written prior permission. The authors make no
12 * representations about the suitability of this software for any purpose. It
13 * is provided "as is" without express or implied warranty.
15 * THE AUTHOR(S) DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21 * PERFORMANCE OF THIS SOFTWARE.
27 #include <sys/types.h>
33 #ifdef HAVE_SYS_STATVFS_H
34 #include <sys/statvfs.h>
36 #ifdef HAVE_SYS_STATFS_H
37 #include <sys/statfs.h>
39 #ifdef HAVE_SYS_PARAM_H
40 #include <sys/param.h>
42 #ifdef HAVE_SYS_MOUNT_H
43 #include <sys/mount.h>
48 typedef long long INT64;
49 #define EPOCH_OFFSET 11644473600ll
51 #define EPOCH_OFFSET 11644473600i64
52 typedef __int64 INT64;
55 /* Workaround for problems in the stat() in the Microsoft C library:
57 * 1) stat() uses FindFirstFile() to get the file
58 * attributes. Unfortunately this API doesn't return correct values
59 * for modification time of a directory until some time after a file
60 * or subdirectory has been added to the directory. (This causes
61 * run-test.sh to fail, for instance.) GetFileAttributesEx() is
62 * better, it returns the updated timestamp right away.
64 * 2) stat() does some strange things related to backward
65 * compatibility with the local time timestamps on FAT volumes and
66 * daylight saving time. This causes problems after the switches
67 * to/from daylight saving time. See
68 * http://bugzilla.gnome.org/show_bug.cgi?id=154968 , especially
69 * comment #30, and http://www.codeproject.com/datetime/dstbugs.asp .
70 * We don't need any of that, FAT and Win9x are as good as dead. So
71 * just use the UTC timestamps from NTFS, converted to the Unix epoch.
75 FcStat (const FcChar8 *file, struct stat *statb)
77 WIN32_FILE_ATTRIBUTE_DATA wfad;
78 char full_path_name[MAX_PATH];
82 if (!GetFileAttributesEx ((LPCSTR) file, GetFileExInfoStandard, &wfad))
87 /* Calculate a pseudo inode number as a hash of the full path name.
88 * Call GetLongPathName() to get the spelling of the path name as it
91 rc = GetFullPathName ((LPCSTR) file, sizeof (full_path_name), full_path_name, &basename);
92 if (rc == 0 || rc > sizeof (full_path_name))
95 rc = GetLongPathName (full_path_name, full_path_name, sizeof (full_path_name));
96 statb->st_ino = FcStringHash ((const FcChar8 *) full_path_name);
98 statb->st_mode = _S_IREAD | _S_IWRITE;
99 statb->st_mode |= (statb->st_mode >> 3) | (statb->st_mode >> 6);
101 if (wfad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
102 statb->st_mode |= _S_IFDIR;
104 statb->st_mode |= _S_IFREG;
107 statb->st_uid = statb->st_gid = 0;
110 if (wfad.nFileSizeHigh > 0)
112 statb->st_size = wfad.nFileSizeLow;
114 statb->st_atime = (*(INT64 *)&wfad.ftLastAccessTime)/10000000 - EPOCH_OFFSET;
115 statb->st_mtime = (*(INT64 *)&wfad.ftLastWriteTime)/10000000 - EPOCH_OFFSET;
116 statb->st_ctime = statb->st_mtime;
124 FcStat (const FcChar8 *file, struct stat *statb)
126 return stat ((char *) file, statb);
129 /* Adler-32 checksum implementation */
136 Adler32Init (struct Adler32 *ctx)
143 Adler32Update (struct Adler32 *ctx, const char *data, int data_len)
147 ctx->a = (ctx->a + *data++) % 65521;
148 ctx->b = (ctx->b + ctx->a) % 65521;
153 Adler32Finish (struct Adler32 *ctx)
155 return ctx->a + (ctx->b << 16);
158 #ifdef HAVE_STRUCT_DIRENT_D_TYPE
159 /* dirent.d_type can be relied upon on FAT filesystem */
161 FcDirChecksumScandirFilter(const struct dirent *entry)
163 return entry->d_type != DT_DIR;
169 FcDirChecksumScandirSorter(const struct dirent **lhs, const struct dirent **rhs)
171 return strcmp((*lhs)->d_name, (*rhs)->d_name);
173 #elif HAVE_SCANDIR_VOID_P
175 FcDirChecksumScandirSorter(const void *a, const void *b)
177 const struct dirent *lhs = a, *rhs = b;
179 return strcmp(lhs->d_name, rhs->d_name);
184 FcDirChecksum (const FcChar8 *dir, time_t *checksum)
187 struct dirent **files;
190 size_t len = strlen ((const char *)dir);
194 n = scandir ((const char *)dir, &files,
195 #ifdef HAVE_STRUCT_DIRENT_D_TYPE
196 &FcDirChecksumScandirFilter,
200 &FcDirChecksumScandirSorter);
206 size_t dlen = strlen (files[n]->d_name);
209 #ifdef HAVE_STRUCT_DIRENT_D_TYPE
210 dtype = files[n]->d_type;
211 if (dtype == DT_UNKNOWN)
215 char f[PATH_MAX + 1];
217 memcpy (f, dir, len);
218 f[len] = FC_DIR_SEPARATOR;
219 memcpy (&f[len + 1], files[n]->d_name, dlen);
220 f[len + 1 + dlen] = 0;
221 if (lstat (f, &statb) < 0)
226 if (S_ISDIR (statb.st_mode))
229 dtype = statb.st_mode;
230 #ifdef HAVE_STRUCT_DIRENT_D_TYPE
233 Adler32Update (&ctx, files[n]->d_name, dlen + 1);
234 Adler32Update (&ctx, (char *)&dtype, sizeof (int));
243 *checksum = Adler32Finish (&ctx);
250 FcStatChecksum (const FcChar8 *file, struct stat *statb)
252 if (FcStat (file, statb) == -1)
256 /* We have a workaround of the broken stat() in FcStat() for Win32.
257 * No need to do something further more.
259 if (FcIsFsMtimeBroken (file))
261 if (FcDirChecksum (file, &statb->st_mtime) == -1)
270 FcFStatFs (int fd, FcStatFS *statb)
272 const char *p = NULL;
274 FcBool flag = FcFalse;
276 #if defined(HAVE_FSTATVFS) && (defined(HAVE_STRUCT_STATVFS_F_BASETYPE) || defined(HAVE_STRUCT_STATVFS_F_FSTYPENAME))
279 memset (statb, 0, sizeof (FcStatFS));
281 if ((ret = fstatvfs (fd, &buf)) == 0)
283 # if defined(HAVE_STRUCT_STATVFS_F_BASETYPE)
285 # elif defined(HAVE_STRUCT_STATVFS_F_FSTYPENAME)
286 p = buf.f_fstypename;
289 #elif defined(HAVE_FSTATFS) && (defined(HAVE_STRUCT_STATFS_F_FLAGS) || defined(HAVE_STRUCT_STATFS_F_FSTYPENAME) || defined(__linux__))
292 memset (statb, 0, sizeof (FcStatFS));
294 if ((ret = fstatfs (fd, &buf)) == 0)
296 # if defined(HAVE_STRUCT_STATFS_F_FLAGS) && defined(MNT_LOCAL)
297 statb->is_remote_fs = !(buf.f_flags & MNT_LOCAL);
300 # if defined(HAVE_STRUCT_STATFS_F_FSTYPENAME)
301 p = buf.f_fstypename;
302 # elif defined(__linux__)
305 case 0x6969: /* nfs */
306 statb->is_remote_fs = FcTrue;
308 case 0x4d44: /* fat */
309 statb->is_mtime_broken = FcTrue;
317 # error "BUG: No way to figure out with fstatfs()"
323 if (!flag && strcmp (p, "nfs") == 0)
324 statb->is_remote_fs = FcTrue;
325 if (strcmp (p, "msdosfs") == 0 ||
326 strcmp (p, "pcfs") == 0)
327 statb->is_mtime_broken = FcTrue;
334 FcIsFsMmapSafe (int fd)
338 if (FcFStatFs (fd, &statb) < 0)
341 return !statb.is_remote_fs;
345 FcIsFsMtimeBroken (const FcChar8 *dir)
347 int fd = FcOpen ((const char *) dir, O_RDONLY);
352 int ret = FcFStatFs (fd, &statb);
358 return statb.is_mtime_broken;