1
2
3
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
32
33
34 if(inode_out != NULL) *inode_out = buf.STAT64_INO_FIELD;
35 if(mode_out != NULL) *mode_out = buf.st_mode;
36 if(nlink_out != NULL) *nlink_out = buf.st_nlink;
37 if(uid_out != NULL) *uid_out = buf.st_uid;
38 if(gid_out != NULL) *gid_out = buf.st_gid;
39 if(size_out != NULL) *size_out = buf.st_size;
40 if(atime_out != NULL) {
41 atime_out->tv_sec = buf.st_atime;
42 atime_out->tv_nsec = 0;
43 }
44 if(mtime_out != NULL) {
45 mtime_out->tv_sec = buf.st_mtime;
46 mtime_out->tv_nsec = 0;
47 }
48 if(ctime_out != NULL) {
49 ctime_out->tv_sec = buf.st_ctime;
50 ctime_out->tv_nsec = 0;
51 }
52 if(blksize_out != NULL) *blksize_out = buf.st_blksize;
53 if(blocks_out != NULL) *blocks_out = buf.st_blocks;
54 return(0);
55}
56
57int file_type(const char *path, int *maj, int *min)
58{
59 struct stat64 buf;
60
61 if(lstat64(path, &buf) < 0)
62 return(-errno);
63
64
65 if(maj != NULL)
66 *maj = major(buf.st_rdev);
67 if(min != NULL)
68 *min = minor(buf.st_rdev);
69
70 if(S_ISDIR(buf.st_mode)) return(OS_TYPE_DIR);
71 else if(S_ISLNK(buf.st_mode)) return(OS_TYPE_SYMLINK);
72 else if(S_ISCHR(buf.st_mode)) return(OS_TYPE_CHARDEV);
73 else if(S_ISBLK(buf.st_mode)) return(OS_TYPE_BLOCKDEV);
74 else if(S_ISFIFO(buf.st_mode))return(OS_TYPE_FIFO);
75 else if(S_ISSOCK(buf.st_mode))return(OS_TYPE_SOCK);
76 else return(OS_TYPE_FILE);
77}
78
79int access_file(char *path, int r, int w, int x)
80{
81 int mode = 0;
82
83 if(r) mode = R_OK;
84 if(w) mode |= W_OK;
85 if(x) mode |= X_OK;
86 if(access(path, mode) != 0) return(-errno);
87 else return(0);
88}
89
90int open_file(char *path, int r, int w, int append)
91{
92 int mode = 0, fd;
93
94 if(r && !w)
95 mode = O_RDONLY;
96 else if(!r && w)
97 mode = O_WRONLY;
98 else if(r && w)
99 mode = O_RDWR;
100 else panic("Impossible mode in open_file");
101
102 if(append)
103 mode |= O_APPEND;
104 fd = open64(path, mode);
105 if(fd < 0) return(-errno);
106 else return(fd);
107}
108
109void *open_dir(char *path, int *err_out)
110{
111 DIR *dir;
112
113 dir = opendir(path);
114 *err_out = errno;
115 if(dir == NULL) return(NULL);
116 return(dir);
117}
118
119char *read_dir(void *stream, unsigned long long *pos,
120 unsigned long long *ino_out, int *len_out)
121{
122 DIR *dir = stream;
123 struct dirent *ent;
124
125 seekdir(dir, *pos);
126 ent = readdir(dir);
127 if(ent == NULL) return(NULL);
128 *len_out = strlen(ent->d_name);
129 *ino_out = ent->d_ino;
130 *pos = telldir(dir);
131 return(ent->d_name);
132}
133
134int read_file(int fd, unsigned long long *offset, char *buf, int len)
135{
136 int n;
137
138 n = pread64(fd, buf, len, *offset);
139 if(n < 0) return(-errno);
140 *offset += n;
141 return(n);
142}
143
144int write_file(int fd, unsigned long long *offset, const char *buf, int len)
145{
146 int n;
147
148 n = pwrite64(fd, buf, len, *offset);
149 if(n < 0) return(-errno);
150 *offset += n;
151 return(n);
152}
153
154int lseek_file(int fd, long long offset, int whence)
155{
156 int ret;
157
158 ret = lseek64(fd, offset, whence);
159 if(ret < 0) return(-errno);
160 return(0);
161}
162
163void close_file(void *stream)
164{
165 close(*((int *) stream));
166}
167
168void close_dir(void *stream)
169{
170 closedir(stream);
171}
172
173int file_create(char *name, int ur, int uw, int ux, int gr,
174 int gw, int gx, int or, int ow, int ox)
175{
176 int mode, fd;
177
178 mode = 0;
179 mode |= ur ? S_IRUSR : 0;
180 mode |= uw ? S_IWUSR : 0;
181 mode |= ux ? S_IXUSR : 0;
182 mode |= gr ? S_IRGRP : 0;
183 mode |= gw ? S_IWGRP : 0;
184 mode |= gx ? S_IXGRP : 0;
185 mode |= or ? S_IROTH : 0;
186 mode |= ow ? S_IWOTH : 0;
187 mode |= ox ? S_IXOTH : 0;
188 fd = open64(name, O_CREAT | O_RDWR, mode);
189 if(fd < 0)
190 return(-errno);
191 return(fd);
192}
193
194int set_attr(const char *file, struct hostfs_iattr *attrs)
195{
196 struct utimbuf buf;
197 int err, ma;
198
199 if(attrs->ia_valid & HOSTFS_ATTR_MODE){
200 if(chmod(file, attrs->ia_mode) != 0) return(-errno);
201 }
202 if(attrs->ia_valid & HOSTFS_ATTR_UID){
203 if(chown(file, attrs->ia_uid, -1)) return(-errno);
204 }
205 if(attrs->ia_valid & HOSTFS_ATTR_GID){
206 if(chown(file, -1, attrs->ia_gid)) return(-errno);
207 }
208 if(attrs->ia_valid & HOSTFS_ATTR_SIZE){
209 if(truncate(file, attrs->ia_size)) return(-errno);
210 }
211 ma = HOSTFS_ATTR_ATIME_SET | HOSTFS_ATTR_MTIME_SET;
212 if((attrs->ia_valid & ma) == ma){
213 buf.actime = attrs->ia_atime.tv_sec;
214 buf.modtime = attrs->ia_mtime.tv_sec;
215 if(utime(file, &buf) != 0) return(-errno);
216 }
217 else {
218 struct timespec ts;
219
220 if(attrs->ia_valid & HOSTFS_ATTR_ATIME_SET){
221 err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
222 NULL, NULL, &ts, NULL, NULL, NULL);
223 if(err != 0)
224 return(err);
225 buf.actime = attrs->ia_atime.tv_sec;
226 buf.modtime = ts.tv_sec;
227 if(utime(file, &buf) != 0)
228 return(-errno);
229 }
230 if(attrs->ia_valid & HOSTFS_ATTR_MTIME_SET){
231 err = stat_file(file, NULL, NULL, NULL, NULL, NULL,
232 NULL, &ts, NULL, NULL, NULL, NULL);
233 if(err != 0)
234 return(err);
235 buf.actime = ts.tv_sec;
236 buf.modtime = attrs->ia_mtime.tv_sec;
237 if(utime(file, &buf) != 0)
238 return(-errno);
239 }
240 }
241 if(attrs->ia_valid & HOSTFS_ATTR_CTIME) ;
242 if(attrs->ia_valid & (HOSTFS_ATTR_ATIME | HOSTFS_ATTR_MTIME)){
243 err = stat_file(file, NULL, NULL, NULL, NULL, NULL, NULL,
244 &attrs->ia_atime, &attrs->ia_mtime, NULL,
245 NULL, NULL);
246 if(err != 0) return(err);
247 }
248 return(0);
249}
250
251int make_symlink(const char *from, const char *to)
252{
253 int err;
254
255 err = symlink(to, from);
256 if(err) return(-errno);
257 return(0);
258}
259
260int unlink_file(const char *file)
261{
262 int err;
263
264 err = unlink(file);
265 if(err) return(-errno);
266 return(0);
267}
268
269int do_mkdir(const char *file, int mode)
270{
271 int err;
272
273 err = mkdir(file, mode);
274 if(err) return(-errno);
275 return(0);
276}
277
278int do_rmdir(const char *file)
279{
280 int err;
281
282 err = rmdir(file);
283 if(err) return(-errno);
284 return(0);
285}
286
287int do_mknod(const char *file, int mode, int dev)
288{
289 int err;
290
291 err = mknod(file, mode, dev);
292 if(err) return(-errno);
293 return(0);
294}
295
296int link_file(const char *to, const char *from)
297{
298 int err;
299
300 err = link(to, from);
301 if(err) return(-errno);
302 return(0);
303}
304
305int do_readlink(char *file, char *buf, int size)
306{
307 int n;
308
309 n = readlink(file, buf, size);
310 if(n < 0)
311 return(-errno);
312 if(n < size)
313 buf[n] = '\0';
314 return(n);
315}
316
317int rename_file(char *from, char *to)
318{
319 int err;
320
321 err = rename(from, to);
322 if(err < 0) return(-errno);
323 return(0);
324}
325
326int do_statfs(char *root, long *bsize_out, long long *blocks_out,
327 long long *bfree_out, long long *bavail_out,
328 long long *files_out, long long *ffree_out,
329 void *fsid_out, int fsid_size, long *namelen_out,
330 long *spare_out)
331{
332 struct statfs64 buf;
333 int err;
334
335 err = statfs64(root, &buf);
336 if(err < 0) return(-errno);
337 *bsize_out = buf.f_bsize;
338 *blocks_out = buf.f_blocks;
339 *bfree_out = buf.f_bfree;
340 *bavail_out = buf.f_bavail;
341 *files_out = buf.f_files;
342 *ffree_out = buf.f_ffree;
343 memcpy(fsid_out, &buf.f_fsid,
344 sizeof(buf.f_fsid) > fsid_size ? fsid_size :
345 sizeof(buf.f_fsid));
346 *namelen_out = buf.f_namelen;
347 spare_out[0] = buf.f_spare[0];
348 spare_out[1] = buf.f_spare[1];
349 spare_out[2] = buf.f_spare[2];
350 spare_out[3] = buf.f_spare[3];
351 spare_out[4] = buf.f_spare[4];
352 spare_out[5] = buf.f_spare[5];
353 return(0);
354}
355
356
357
358
359
360
361
362
363
364
365
366
