source: mainline/uspace/app/bdsh/cmds/modules/cp/cp.c@ 948222e4

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since 948222e4 was 948222e4, checked in by Jiri Svoboda <jiri@…>, 7 years ago

A few more cases of for loops without iteration expression (which isn't really a for loop).
  • Property mode set to 100644
File size: 12.6 KB
Line 
1/*
2 * Copyright (c) 2008 Tim Post
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <errno.h>
30#include <str_error.h>
31#include <stdio.h>
32#include <stdlib.h>
33#include <io/console.h>
34#include <io/keycode.h>
35#include <getopt.h>
36#include <str.h>
37#include <vfs/vfs.h>
38#include <dirent.h>
39#include "config.h"
40#include "util.h"
41#include "errors.h"
42#include "entry.h"
43#include "cp.h"
44#include "cmds.h"
45
46#define CP_VERSION "0.0.1"
47#define CP_DEFAULT_BUFLEN 1024
48
49static const char *cmdname = "cp";
50static console_ctrl_t *con;
51
52static struct option const long_options[] = {
53 { "buffer", required_argument, 0, 'b' },
54 { "force", no_argument, 0, 'f' },
55 { "interactive", no_argument, 0, 'i'},
56 { "recursive", no_argument, 0, 'r' },
57 { "help", no_argument, 0, 'h' },
58 { "version", no_argument, 0, 'v' },
59 { "verbose", no_argument, 0, 'V' },
60 { 0, 0, 0, 0 }
61};
62
63typedef enum {
64 TYPE_NONE,
65 TYPE_FILE,
66 TYPE_DIR
67} dentry_type_t;
68
69static int copy_file(const char *src, const char *dest,
70 size_t blen, int vb);
71
72/** Get the type of a directory entry.
73 *
74 * @param path Path of the directory entry.
75 *
76 * @return TYPE_DIR if the dentry is a directory.
77 * @return TYPE_FILE if the dentry is a file.
78 * @return TYPE_NONE if the dentry does not exists.
79 */
80static dentry_type_t get_type(const char *path)
81{
82 vfs_stat_t s;
83
84 errno_t r = vfs_stat_path(path, &s);
85
86 if (r != EOK)
87 return TYPE_NONE;
88 else if (s.is_directory)
89 return TYPE_DIR;
90 else if (s.is_file)
91 return TYPE_FILE;
92
93 return TYPE_NONE;
94}
95
96static int strtoint(const char *s1)
97{
98 long t1;
99
100 if (-1 == (t1 = strtol(s1, (char **) NULL, 10)))
101 return -1;
102
103 if (t1 <= 0)
104 return -1;
105
106 return (int) t1;
107}
108
109/** Get the last component of a path.
110 *
111 * e.g. /data/a ---> a
112 *
113 * @param path Pointer to the path.
114 *
115 * @return Pointer to the last component or to the path itself.
116 */
117static char *get_last_path_component(char *path)
118{
119 char *ptr;
120
121 ptr = str_rchr(path, '/');
122 if (!ptr)
123 return path;
124 else
125 return ptr + 1;
126}
127
128/** Merge two paths together.
129 *
130 * e.g. (path1 = /data/dir, path2 = a/b) --> /data/dir/a/b
131 *
132 * @param path1 Path to which path2 will be appended.
133 * @param path1_size Size of the path1 buffer.
134 * @param path2 Path that will be appended to path1.
135 */
136static void merge_paths(char *path1, size_t path1_size, char *path2)
137{
138 const char *delim = "/";
139
140 str_rtrim(path1, '/');
141 str_append(path1, path1_size, delim);
142 str_append(path1, path1_size, path2);
143}
144
145static bool get_user_decision(bool bdefault, const char *message, ...)
146{
147 va_list args;
148
149 va_start(args, message);
150 vprintf(message, args);
151 va_end(args);
152
153 while (true) {
154 cons_event_t ev;
155 console_flush(con);
156 console_get_event(con, &ev);
157 if (ev.type != CEV_KEY || ev.ev.key.type != KEY_PRESS ||
158 (ev.ev.key.mods & (KM_CTRL | KM_ALT)) != 0) {
159 continue;
160 }
161
162 switch(ev.ev.key.key) {
163 case KC_Y:
164 printf("y\n");
165 return true;
166 case KC_N:
167 printf("n\n");
168 return false;
169 case KC_ENTER:
170 printf("%c\n", bdefault ? 'Y' : 'N');
171 return bdefault;
172 default:
173 break;
174 }
175 }
176}
177
178static errno_t do_copy(const char *src, const char *dest,
179 size_t blen, int vb, int recursive, int force, int interactive)
180{
181 errno_t rc = EOK;
182 char dest_path[PATH_MAX];
183 char src_path[PATH_MAX];
184 DIR *dir = NULL;
185 struct dirent *dp;
186
187 dentry_type_t src_type = get_type(src);
188 dentry_type_t dest_type = get_type(dest);
189
190 const size_t src_len = str_size(src);
191
192 if (src_type == TYPE_FILE) {
193 char *src_fname;
194
195 /* Initialize the src_path with the src argument */
196 str_cpy(src_path, src_len + 1, src);
197 str_rtrim(src_path, '/');
198
199 /* Get the last component name from the src path */
200 src_fname = get_last_path_component(src_path);
201
202 /* Initialize dest_path with the dest argument */
203 str_cpy(dest_path, PATH_MAX, dest);
204
205 if (dest_type == TYPE_DIR) {
206 /* e.g. cp file_name /data */
207 /* e.g. cp file_name /data/ */
208
209 /* dest is a directory,
210 * append the src filename to it.
211 */
212 merge_paths(dest_path, PATH_MAX, src_fname);
213 dest_type = get_type(dest_path);
214 } else if (dest_type == TYPE_NONE) {
215 if (dest_path[str_size(dest_path) - 1] == '/') {
216 /* e.g. cp /textdemo /data/dirnotexists/ */
217
218 printf("The dest directory %s does not exists",
219 dest_path);
220 rc = ENOENT;
221 goto exit;
222 }
223 }
224
225 if (dest_type == TYPE_DIR) {
226 printf("Cannot overwrite existing directory %s\n",
227 dest_path);
228 rc = EEXIST;
229 goto exit;
230 } else if (dest_type == TYPE_FILE) {
231 /* e.g. cp file_name existing_file */
232
233 /* dest already exists,
234 * if force is set we will try to remove it.
235 * if interactive is set user input is required.
236 */
237 if (force && !interactive) {
238 rc = vfs_unlink_path(dest_path);
239 if (rc != EOK) {
240 printf("Unable to remove %s\n",
241 dest_path);
242 goto exit;
243 }
244 } else if (!force && interactive) {
245 bool overwrite = get_user_decision(false,
246 "File already exists: %s. Overwrite? [y/N]: ",
247 dest_path);
248 if (overwrite) {
249 printf("Overwriting file: %s\n", dest_path);
250 rc = vfs_unlink_path(dest_path);
251 if (rc != EOK) {
252 printf("Unable to remove %s\n", dest_path);
253 goto exit;
254 }
255 } else {
256 printf("Not overwriting file: %s\n", dest_path);
257 rc = EOK;
258 goto exit;
259 }
260 } else {
261 printf("File already exists: %s\n", dest_path);
262 rc = EEXIST;
263 goto exit;
264 }
265 }
266
267 /* call copy_file and exit */
268 if (copy_file(src, dest_path, blen, vb) < 0) {
269 rc = EIO;
270 }
271
272 } else if (src_type == TYPE_DIR) {
273 /* e.g. cp -r /x/srcdir /y/destdir/ */
274
275 if (!recursive) {
276 printf("Cannot copy the %s directory without the "
277 "-r option\n", src);
278 rc = EINVAL;
279 goto exit;
280 } else if (dest_type == TYPE_FILE) {
281 printf("Cannot overwrite a file with a directory\n");
282 rc = EEXIST;
283 goto exit;
284 }
285
286 char *src_dirname;
287
288 /* Initialize src_path with the content of src */
289 str_cpy(src_path, src_len + 1, src);
290 str_rtrim(src_path, '/');
291
292 src_dirname = get_last_path_component(src_path);
293
294 str_cpy(dest_path, PATH_MAX, dest);
295
296 switch (dest_type) {
297 case TYPE_DIR:
298 if (str_cmp(src_dirname, "..") &&
299 str_cmp(src_dirname, ".")) {
300 /* The last component of src_path is
301 * not '.' or '..'
302 */
303 merge_paths(dest_path, PATH_MAX, src_dirname);
304
305 rc = vfs_link_path(dest_path, KIND_DIRECTORY,
306 NULL);
307 if (rc != EOK) {
308 printf("Unable to create "
309 "dest directory %s\n", dest_path);
310 goto exit;
311 }
312 }
313 break;
314 default:
315 case TYPE_NONE:
316 /* dest does not exists, this means the user wants
317 * to specify the name of the destination directory
318 *
319 * e.g. cp -r /src /data/new_dir_src
320 */
321 rc = vfs_link_path(dest_path, KIND_DIRECTORY, NULL);
322 if (rc != EOK) {
323 printf("Unable to create "
324 "dest directory %s\n", dest_path);
325 goto exit;
326 }
327 break;
328 }
329
330 dir = opendir(src);
331 if (!dir) {
332 /* Something strange is happening... */
333 printf("Unable to open src %s directory\n", src);
334 rc = ENOENT;
335 goto exit;
336 }
337
338 /* Copy every single directory entry of src into the
339 * destination directory.
340 */
341 while ((dp = readdir(dir))) {
342 vfs_stat_t src_s;
343 vfs_stat_t dest_s;
344
345 char src_dent[PATH_MAX];
346 char dest_dent[PATH_MAX];
347
348 str_cpy(src_dent, PATH_MAX, src);
349 merge_paths(src_dent, PATH_MAX, dp->d_name);
350
351 str_cpy(dest_dent, PATH_MAX, dest_path);
352 merge_paths(dest_dent, PATH_MAX, dp->d_name);
353
354 /* Check if we are copying a directory into itself */
355 vfs_stat_path(src_dent, &src_s);
356 vfs_stat_path(dest_path, &dest_s);
357
358 if (dest_s.index == src_s.index &&
359 dest_s.fs_handle == src_s.fs_handle) {
360 printf("Cannot copy a directory "
361 "into itself\n");
362 rc = EEXIST;
363 goto exit;
364 }
365
366 if (vb)
367 printf("copy %s %s\n", src_dent, dest_dent);
368
369 /* Recursively call do_copy() */
370 rc = do_copy(src_dent, dest_dent, blen, vb, recursive,
371 force, interactive);
372 if (rc != EOK)
373 goto exit;
374
375 }
376 } else
377 printf("Unable to open source file %s\n", src);
378
379exit:
380 if (dir)
381 closedir(dir);
382 return rc;
383}
384
385static int copy_file(const char *src, const char *dest,
386 size_t blen, int vb)
387{
388 int fd1, fd2;
389 size_t rbytes, wbytes;
390 errno_t rc;
391 off64_t total;
392 char *buff = NULL;
393 aoff64_t posr = 0, posw = 0;
394 vfs_stat_t st;
395
396 if (vb)
397 printf("Copying %s to %s\n", src, dest);
398
399 rc = vfs_lookup_open(src, WALK_REGULAR, MODE_READ, &fd1);
400 if (rc != EOK) {
401 printf("Unable to open source file %s\n", src);
402 return -1;
403 }
404
405 rc = vfs_lookup_open(dest, WALK_REGULAR | WALK_MAY_CREATE, MODE_WRITE, &fd2);
406 if (rc != EOK) {
407 printf("Unable to open destination file %s\n", dest);
408 vfs_put(fd1);
409 return -1;
410 }
411
412 if (vfs_stat(fd1, &st) != EOK) {
413 printf("Unable to fstat %d\n", fd1);
414 vfs_put(fd1);
415 vfs_put(fd2);
416 return -1;
417 }
418
419 total = st.size;
420 if (vb)
421 printf("%" PRIu64 " bytes to copy\n", total);
422
423 if (NULL == (buff = (char *) malloc(blen))) {
424 printf("Unable to allocate enough memory to read %s\n",
425 src);
426 rc = ENOMEM;
427 goto out;
428 }
429
430 while ((rc = vfs_read(fd1, &posr, buff, blen, &rbytes)) == EOK &&
431 rbytes > 0) {
432 if ((rc = vfs_write(fd2, &posw, buff, rbytes, &wbytes)) != EOK)
433 break;
434 }
435
436 if (rc != EOK) {
437 printf("\nError copying %s: %s\n", src, str_error(rc));
438 return -1;
439 }
440
441out:
442 vfs_put(fd1);
443 vfs_put(fd2);
444 if (buff)
445 free(buff);
446 if (rc != EOK) {
447 return -1;
448 } else {
449 return 0;
450 }
451}
452
453void help_cmd_cp(unsigned int level)
454{
455 static char helpfmt[] =
456 "Usage: %s [options] <source> <dest>\n"
457 "Options:\n"
458 " -h, --help A short option summary\n"
459 " -v, --version Print version information and exit\n"
460 " -V, --verbose Be annoyingly noisy about what's being done\n"
461 " -f, --force Do not complain when <dest> exists (overrides a previous -i)\n"
462 " -i, --interactive Ask what to do when <dest> exists (overrides a previous -f)\n"
463 " -r, --recursive Copy entire directories\n"
464 " -b, --buffer ## Set the read buffer size to ##\n";
465 if (level == HELP_SHORT) {
466 printf("`%s' copies files and directories\n", cmdname);
467 } else {
468 help_cmd_cp(HELP_SHORT);
469 printf(helpfmt, cmdname);
470 }
471
472 return;
473}
474
475int cmd_cp(char **argv)
476{
477 unsigned int argc, verbose = 0;
478 int buffer = 0, recursive = 0;
479 int force = 0, interactive = 0;
480 int c, opt_ind;
481 errno_t ret;
482
483 con = console_init(stdin, stdout);
484 argc = cli_count_args(argv);
485
486 c = 0;
487 optreset = 1;
488 optind = 0;
489 opt_ind = 0;
490
491 while (c != -1) {
492 c = getopt_long(argc, argv, "hvVfirb:", long_options, &opt_ind);
493 switch (c) {
494 case 'h':
495 help_cmd_cp(1);
496 return CMD_SUCCESS;
497 case 'v':
498 printf("%s\n", CP_VERSION);
499 return CMD_SUCCESS;
500 case 'V':
501 verbose = 1;
502 break;
503 case 'f':
504 interactive = 0;
505 force = 1;
506 break;
507 case 'i':
508 force = 0;
509 interactive = 1;
510 break;
511 case 'r':
512 recursive = 1;
513 break;
514 case 'b':
515 if (-1 == (buffer = strtoint(optarg))) {
516 printf("%s: Invalid buffer specification, "
517 "(should be a number greater than zero)\n",
518 cmdname);
519 console_done(con);
520 return CMD_FAILURE;
521 }
522 if (verbose)
523 printf("Buffer = %d\n", buffer);
524 break;
525 }
526 }
527
528 if (buffer == 0)
529 buffer = CP_DEFAULT_BUFLEN;
530
531 argc -= optind;
532
533 if (argc != 2) {
534 printf("%s: invalid number of arguments. Try %s --help\n",
535 cmdname, cmdname);
536 console_done(con);
537 return CMD_FAILURE;
538 }
539
540 ret = do_copy(argv[optind], argv[optind + 1], buffer, verbose,
541 recursive, force, interactive);
542
543 console_done(con);
544
545 if (ret == 0)
546 return CMD_SUCCESS;
547 else
548 return CMD_FAILURE;
549}
550
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