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1da177e4 LT |
1 | /* |
2 | * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) | |
3 | * Licensed under the GPL | |
4 | */ | |
5 | ||
6 | #include <unistd.h> | |
7 | #include <stdio.h> | |
8 | #include <fcntl.h> | |
9 | #include <dirent.h> | |
10 | #include <errno.h> | |
11 | #include <utime.h> | |
12 | #include <string.h> | |
13 | #include <sys/stat.h> | |
14 | #include <sys/time.h> | |
15 | #include <sys/vfs.h> | |
16 | #include "hostfs.h" | |
17 | #include "kern_util.h" | |
18 | #include "user.h" | |
19 | ||
20 | int stat_file(const char *path, unsigned long long *inode_out, int *mode_out, | |
21 | int *nlink_out, int *uid_out, int *gid_out, | |
22 | unsigned long long *size_out, struct timespec *atime_out, | |
23 | struct timespec *mtime_out, struct timespec *ctime_out, | |
24 | int *blksize_out, unsigned long long *blocks_out) | |
25 | { | |
26 | struct stat64 buf; | |
27 | ||
28 | if(lstat64(path, &buf) < 0) | |
29 | return(-errno); | |
30 | ||
31 | if(inode_out != NULL) *inode_out = buf.st_ino; | |
32 | if(mode_out != NULL) *mode_out = buf.st_mode; | |
33 | if(nlink_out != NULL) *nlink_out = buf.st_nlink; | |
34 | if(uid_out != NULL) *uid_out = buf.st_uid; | |
35 | if(gid_out != NULL) *gid_out = buf.st_gid; | |
36 | if(size_out != NULL) *size_out = buf.st_size; | |
37 | if(atime_out != NULL) { | |
38 | atime_out->tv_sec = buf.st_atime; | |
39 | atime_out->tv_nsec = 0; | |
40 | } | |
41 | if(mtime_out != NULL) { | |
42 | mtime_out->tv_sec = buf.st_mtime; | |
43 | mtime_out->tv_nsec = 0; | |
44 | } | |
45 | if(ctime_out != NULL) { | |
46 | ctime_out->tv_sec = buf.st_ctime; | |
47 | ctime_out->tv_nsec = 0; | |
48 | } | |
49 | if(blksize_out != NULL) *blksize_out = buf.st_blksize; | |
50 | if(blocks_out != NULL) *blocks_out = buf.st_blocks; | |
51 | return(0); | |
52 | } | |
53 | ||
54 | int file_type(const char *path, int *maj, int *min) | |
55 | { | |
56 | struct stat64 buf; | |
57 | ||
58 | if(lstat64(path, &buf) < 0) | |
59 | return(-errno); | |
60 | /*We cannot pass rdev as is because glibc and the kernel disagree | |
61 | *about its definition.*/ | |
62 | if(maj != NULL) | |
63 | *maj = major(buf.st_rdev); | |
64 | if(min != NULL) | |
65 | *min = minor(buf.st_rdev); | |
66 | ||
67 | if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR); | |
68 | else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK); | |
69 | else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV); | |
70 | else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV); | |
71 | else if(S_ISFIFO(buf.st_mode))return(OS_TYPE_FIFO); | |
72 | else if(S_ISSOCK(buf.st_mode))return(OS_TYPE_SOCK); | |
73 | else return(OS_TYPE_FILE); | |
74 | } | |
75 | ||
76 | int access_file(char *path, int r, int w, int x) | |
77 | { | |
78 | int mode = 0; | |
79 | ||
80 | if(r) mode = R_OK; | |
81 | if(w) mode |= W_OK; | |
82 | if(x) mode |= X_OK; | |
83 | if(access(path, mode) != 0) return(-errno); | |
84 | else return(0); | |
85 | } | |
86 | ||
87 | int open_file(char *path, int r, int w, int append) | |
88 | { | |
89 | int mode = 0, fd; | |
90 | ||
91 | if(r && !w) | |
92 | mode = O_RDONLY; | |
93 | else if(!r && w) | |
94 | mode = O_WRONLY; | |
95 | else if(r && w) | |
96 | mode = O_RDWR; | |
97 | else panic("Impossible mode in open_file"); | |
98 | ||
99 | if(append) | |
100 | mode |= O_APPEND; | |
101 | fd = open64(path, mode); | |
102 | if(fd < 0) return(-errno); | |
103 | else return(fd); | |
104 | } | |
105 | ||
106 | void *open_dir(char *path, int *err_out) | |
107 | { | |
108 | DIR *dir; | |
109 | ||
110 | dir = opendir(path); | |
111 | *err_out = errno; | |
112 | if(dir == NULL) return(NULL); | |
113 | return(dir); | |
114 | } | |
115 | ||
116 | char *read_dir(void *stream, unsigned long long *pos, | |
117 | unsigned long long *ino_out, int *len_out) | |
118 | { | |
119 | DIR *dir = stream; | |
120 | struct dirent *ent; | |
121 | ||
122 | seekdir(dir, *pos); | |
123 | ent = readdir(dir); | |
124 | if(ent == NULL) return(NULL); | |
125 | *len_out = strlen(ent->d_name); | |
126 | *ino_out = ent->d_ino; | |
127 | *pos = telldir(dir); | |
128 | return(ent->d_name); | |
129 | } | |
130 | ||
131 | int read_file(int fd, unsigned long long *offset, char *buf, int len) | |
132 | { | |
133 | int n; | |
134 | ||
135 | n = pread64(fd, buf, len, *offset); | |
136 | if(n < 0) return(-errno); | |
137 | *offset += n; | |
138 | return(n); | |
139 | } | |
140 | ||
141 | int write_file(int fd, unsigned long long *offset, const char *buf, int len) | |
142 | { | |
143 | int n; | |
144 | ||
145 | n = pwrite64(fd, buf, len, *offset); | |
146 | if(n < 0) return(-errno); | |
147 | *offset += n; | |
148 | return(n); | |
149 | } | |
150 | ||
151 | int lseek_file(int fd, long long offset, int whence) | |
152 | { | |
153 | int ret; | |
154 | ||
155 | ret = lseek64(fd, offset, whence); | |
a2d76bd8 PBG |
156 | if(ret < 0) |
157 | return(-errno); | |
1da177e4 LT |
158 | return(0); |
159 | } | |
160 | ||
a2d76bd8 PBG |
161 | int fsync_file(int fd, int datasync) |
162 | { | |
163 | int ret; | |
164 | if (datasync) | |
165 | ret = fdatasync(fd); | |
166 | else | |
167 | ret = fsync(fd); | |
168 | ||
169 | if (ret < 0) | |
170 | return -errno; | |
171 | return 0; | |
172 | } | |
173 | ||
1da177e4 LT |
174 | void close_file(void *stream) |
175 | { | |
176 | close(*((int *) stream)); | |
177 | } | |
178 | ||
179 | void close_dir(void *stream) | |
180 | { | |
181 | closedir(stream); | |
182 | } | |
183 | ||
184 | int file_create(char *name, int ur, int uw, int ux, int gr, | |
185 | int gw, int gx, int or, int ow, int ox) | |
186 | { | |
187 | int mode, fd; | |
188 | ||
189 | mode = 0; | |
190 | mode |= ur ? S_IRUSR : 0; | |
191 | mode |= uw ? S_IWUSR : 0; | |
192 | mode |= ux ? S_IXUSR : 0; | |
193 | mode |= gr ? S_IRGRP : 0; | |
194 | mode |= gw ? S_IWGRP : 0; | |
195 | mode |= gx ? S_IXGRP : 0; | |
196 | mode |= or ? S_IROTH : 0; | |
197 | mode |= ow ? S_IWOTH : 0; | |
198 | mode |= ox ? S_IXOTH : 0; | |
199 | fd = open64(name, O_CREAT | O_RDWR, mode); | |
200 | if(fd < 0) | |
201 | return(-errno); | |
202 | return(fd); | |
203 | } | |
204 | ||
205 | int set_attr(const char *file, struct hostfs_iattr *attrs) | |
206 | { | |
207 | struct utimbuf buf; | |
208 | int err, ma; | |
209 | ||
210 | if(attrs->ia_valid & HOSTFS_ATTR_MODE){ | |
211 | if(chmod(file, attrs->ia_mode) != 0) return(-errno); | |
212 | } | |
213 | if(attrs->ia_valid & HOSTFS_ATTR_UID){ | |
214 | if(chown(file, attrs->ia_uid, -1)) return(-errno); | |
215 | } | |
216 | if(attrs->ia_valid & HOSTFS_ATTR_GID){ | |
217 | if(chown(file, -1, attrs->ia_gid)) return(-errno); | |
218 | } | |
219 | if(attrs->ia_valid & HOSTFS_ATTR_SIZE){ | |
220 | if(truncate(file, attrs->ia_size)) return(-errno); | |
221 | } | |
222 | ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET; | |
223 | if((attrs->ia_valid & ma) == ma){ | |
224 | buf.actime = attrs->ia_atime.tv_sec; | |
225 | buf.modtime = attrs->ia_mtime.tv_sec; | |
226 | if(utime(file, &buf) != 0) return(-errno); | |
227 | } | |
228 | else { | |
229 | struct timespec ts; | |
230 | ||
231 | if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){ | |
232 | err = stat_file(file, NULL, NULL, NULL, NULL, NULL, | |
233 | NULL, NULL, &ts, NULL, NULL, NULL); | |
234 | if(err != 0) | |
235 | return(err); | |
236 | buf.actime = attrs->ia_atime.tv_sec; | |
237 | buf.modtime = ts.tv_sec; | |
238 | if(utime(file, &buf) != 0) | |
239 | return(-errno); | |
240 | } | |
241 | if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){ | |
242 | err = stat_file(file, NULL, NULL, NULL, NULL, NULL, | |
243 | NULL, &ts, NULL, NULL, NULL, NULL); | |
244 | if(err != 0) | |
245 | return(err); | |
246 | buf.actime = ts.tv_sec; | |
247 | buf.modtime = attrs->ia_mtime.tv_sec; | |
248 | if(utime(file, &buf) != 0) | |
249 | return(-errno); | |
250 | } | |
251 | } | |
252 | if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ; | |
253 | if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){ | |
254 | err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL, | |
255 | &attrs->ia_atime, &attrs->ia_mtime, NULL, | |
256 | NULL, NULL); | |
257 | if(err != 0) return(err); | |
258 | } | |
259 | return(0); | |
260 | } | |
261 | ||
262 | int make_symlink(const char *from, const char *to) | |
263 | { | |
264 | int err; | |
265 | ||
266 | err = symlink(to, from); | |
267 | if(err) return(-errno); | |
268 | return(0); | |
269 | } | |
270 | ||
271 | int unlink_file(const char *file) | |
272 | { | |
273 | int err; | |
274 | ||
275 | err = unlink(file); | |
276 | if(err) return(-errno); | |
277 | return(0); | |
278 | } | |
279 | ||
280 | int do_mkdir(const char *file, int mode) | |
281 | { | |
282 | int err; | |
283 | ||
284 | err = mkdir(file, mode); | |
285 | if(err) return(-errno); | |
286 | return(0); | |
287 | } | |
288 | ||
289 | int do_rmdir(const char *file) | |
290 | { | |
291 | int err; | |
292 | ||
293 | err = rmdir(file); | |
294 | if(err) return(-errno); | |
295 | return(0); | |
296 | } | |
297 | ||
298 | int do_mknod(const char *file, int mode, int dev) | |
299 | { | |
300 | int err; | |
301 | ||
302 | err = mknod(file, mode, dev); | |
303 | if(err) return(-errno); | |
304 | return(0); | |
305 | } | |
306 | ||
307 | int link_file(const char *to, const char *from) | |
308 | { | |
309 | int err; | |
310 | ||
311 | err = link(to, from); | |
312 | if(err) return(-errno); | |
313 | return(0); | |
314 | } | |
315 | ||
316 | int do_readlink(char *file, char *buf, int size) | |
317 | { | |
318 | int n; | |
319 | ||
320 | n = readlink(file, buf, size); | |
321 | if(n < 0) | |
322 | return(-errno); | |
323 | if(n < size) | |
324 | buf[n] = '\0'; | |
325 | return(n); | |
326 | } | |
327 | ||
328 | int rename_file(char *from, char *to) | |
329 | { | |
330 | int err; | |
331 | ||
332 | err = rename(from, to); | |
333 | if(err < 0) return(-errno); | |
334 | return(0); | |
335 | } | |
336 | ||
337 | int do_statfs(char *root, long *bsize_out, long long *blocks_out, | |
338 | long long *bfree_out, long long *bavail_out, | |
339 | long long *files_out, long long *ffree_out, | |
340 | void *fsid_out, int fsid_size, long *namelen_out, | |
341 | long *spare_out) | |
342 | { | |
343 | struct statfs64 buf; | |
344 | int err; | |
345 | ||
346 | err = statfs64(root, &buf); | |
347 | if(err < 0) return(-errno); | |
348 | *bsize_out = buf.f_bsize; | |
349 | *blocks_out = buf.f_blocks; | |
350 | *bfree_out = buf.f_bfree; | |
351 | *bavail_out = buf.f_bavail; | |
352 | *files_out = buf.f_files; | |
353 | *ffree_out = buf.f_ffree; | |
354 | memcpy(fsid_out, &buf.f_fsid, | |
355 | sizeof(buf.f_fsid) > fsid_size ? fsid_size : | |
356 | sizeof(buf.f_fsid)); | |
357 | *namelen_out = buf.f_namelen; | |
358 | spare_out[0] = buf.f_spare[0]; | |
359 | spare_out[1] = buf.f_spare[1]; | |
360 | spare_out[2] = buf.f_spare[2]; | |
361 | spare_out[3] = buf.f_spare[3]; | |
362 | spare_out[4] = buf.f_spare[4]; | |
1da177e4 LT |
363 | return(0); |
364 | } | |
365 | ||
366 | /* | |
367 | * Overrides for Emacs so that we follow Linus's tabbing style. | |
368 | * Emacs will notice this stuff at the end of the file and automatically | |
369 | * adjust the settings for this buffer only. This must remain at the end | |
370 | * of the file. | |
371 | * --------------------------------------------------------------------------- | |
372 | * Local variables: | |
373 | * c-file-style: "linux" | |
374 | * End: | |
375 | */ |