blob: 4796e8490f7d47705e1a1401ba2e4f77f2e38fb7 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
20int 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
54int 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
76int 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
87int 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
106void *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
116char *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
131int 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
141int 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
151int lseek_file(int fd, long long offset, int whence)
152{
153 int ret;
154
155 ret = lseek64(fd, offset, whence);
156 if(ret < 0) return(-errno);
157 return(0);
158}
159
160void close_file(void *stream)
161{
162 close(*((int *) stream));
163}
164
165void close_dir(void *stream)
166{
167 closedir(stream);
168}
169
170int file_create(char *name, int ur, int uw, int ux, int gr,
171 int gw, int gx, int or, int ow, int ox)
172{
173 int mode, fd;
174
175 mode = 0;
176 mode |= ur ? S_IRUSR : 0;
177 mode |= uw ? S_IWUSR : 0;
178 mode |= ux ? S_IXUSR : 0;
179 mode |= gr ? S_IRGRP : 0;
180 mode |= gw ? S_IWGRP : 0;
181 mode |= gx ? S_IXGRP : 0;
182 mode |= or ? S_IROTH : 0;
183 mode |= ow ? S_IWOTH : 0;
184 mode |= ox ? S_IXOTH : 0;
185 fd = open64(name, O_CREAT | O_RDWR, mode);
186 if(fd < 0)
187 return(-errno);
188 return(fd);
189}
190
191int set_attr(const char *file, struct hostfs_iattr *attrs)
192{
193 struct utimbuf buf;
194 int err, ma;
195
196 if(attrs->ia_valid & HOSTFS_ATTR_MODE){
197 if(chmod(file, attrs->ia_mode) != 0) return(-errno);
198 }
199 if(attrs->ia_valid & HOSTFS_ATTR_UID){
200 if(chown(file, attrs->ia_uid, -1)) return(-errno);
201 }
202 if(attrs->ia_valid & HOSTFS_ATTR_GID){
203 if(chown(file, -1, attrs->ia_gid)) return(-errno);
204 }
205 if(attrs->ia_valid & HOSTFS_ATTR_SIZE){
206 if(truncate(file, attrs->ia_size)) return(-errno);
207 }
208 ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET;
209 if((attrs->ia_valid & ma) == ma){
210 buf.actime = attrs->ia_atime.tv_sec;
211 buf.modtime = attrs->ia_mtime.tv_sec;
212 if(utime(file, &buf) != 0) return(-errno);
213 }
214 else {
215 struct timespec ts;
216
217 if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){
218 err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
219 NULL, NULL, &ts, NULL, NULL, NULL);
220 if(err != 0)
221 return(err);
222 buf.actime = attrs->ia_atime.tv_sec;
223 buf.modtime = ts.tv_sec;
224 if(utime(file, &buf) != 0)
225 return(-errno);
226 }
227 if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){
228 err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
229 NULL, &ts, NULL, NULL, NULL, NULL);
230 if(err != 0)
231 return(err);
232 buf.actime = ts.tv_sec;
233 buf.modtime = attrs->ia_mtime.tv_sec;
234 if(utime(file, &buf) != 0)
235 return(-errno);
236 }
237 }
238 if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ;
239 if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){
240 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
241 &attrs->ia_atime, &attrs->ia_mtime, NULL,
242 NULL, NULL);
243 if(err != 0) return(err);
244 }
245 return(0);
246}
247
248int make_symlink(const char *from, const char *to)
249{
250 int err;
251
252 err = symlink(to, from);
253 if(err) return(-errno);
254 return(0);
255}
256
257int unlink_file(const char *file)
258{
259 int err;
260
261 err = unlink(file);
262 if(err) return(-errno);
263 return(0);
264}
265
266int do_mkdir(const char *file, int mode)
267{
268 int err;
269
270 err = mkdir(file, mode);
271 if(err) return(-errno);
272 return(0);
273}
274
275int do_rmdir(const char *file)
276{
277 int err;
278
279 err = rmdir(file);
280 if(err) return(-errno);
281 return(0);
282}
283
284int do_mknod(const char *file, int mode, int dev)
285{
286 int err;
287
288 err = mknod(file, mode, dev);
289 if(err) return(-errno);
290 return(0);
291}
292
293int link_file(const char *to, const char *from)
294{
295 int err;
296
297 err = link(to, from);
298 if(err) return(-errno);
299 return(0);
300}
301
302int do_readlink(char *file, char *buf, int size)
303{
304 int n;
305
306 n = readlink(file, buf, size);
307 if(n < 0)
308 return(-errno);
309 if(n < size)
310 buf[n] = '\0';
311 return(n);
312}
313
314int rename_file(char *from, char *to)
315{
316 int err;
317
318 err = rename(from, to);
319 if(err < 0) return(-errno);
320 return(0);
321}
322
323int do_statfs(char *root, long *bsize_out, long long *blocks_out,
324 long long *bfree_out, long long *bavail_out,
325 long long *files_out, long long *ffree_out,
326 void *fsid_out, int fsid_size, long *namelen_out,
327 long *spare_out)
328{
329 struct statfs64 buf;
330 int err;
331
332 err = statfs64(root, &buf);
333 if(err < 0) return(-errno);
334 *bsize_out = buf.f_bsize;
335 *blocks_out = buf.f_blocks;
336 *bfree_out = buf.f_bfree;
337 *bavail_out = buf.f_bavail;
338 *files_out = buf.f_files;
339 *ffree_out = buf.f_ffree;
340 memcpy(fsid_out, &buf.f_fsid,
341 sizeof(buf.f_fsid) > fsid_size ? fsid_size :
342 sizeof(buf.f_fsid));
343 *namelen_out = buf.f_namelen;
344 spare_out[0] = buf.f_spare[0];
345 spare_out[1] = buf.f_spare[1];
346 spare_out[2] = buf.f_spare[2];
347 spare_out[3] = buf.f_spare[3];
348 spare_out[4] = buf.f_spare[4];
349 spare_out[5] = buf.f_spare[5];
350 return(0);
351}
352
353/*
354 * Overrides for Emacs so that we follow Linus's tabbing style.
355 * Emacs will notice this stuff at the end of the file and automatically
356 * adjust the settings for this buffer only. This must remain at the end
357 * of the file.
358 * ---------------------------------------------------------------------------
359 * Local variables:
360 * c-file-style: "linux"
361 * End:
362 */