source: branches/samba-3.0/source/utils/smbget.c@ 1071

Last change on this file since 1071 was 1, checked in by Paul Smedley, 19 years ago

Initial code import
File size: 17.3 KB
Line 
1/*
2 smbget: a wget-like utility with support for recursive downloading and
3 smb:// urls
4 Copyright (C) 2003-2004 Jelmer Vernooij <jelmer@samba.org>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19
20#include "includes.h"
21#include "libsmbclient.h"
22
23#if _FILE_OFFSET_BITS==64
24#define OFF_T_FORMAT "%lld"
25#define OFF_T_FORMAT_CAST long long
26#else
27#define OFF_T_FORMAT "%ld"
28#define OFF_T_FORMAT_CAST long
29#endif
30
31int columns = 0;
32
33static int _resume, _recursive, debuglevel;
34static char *outputfile;
35
36
37time_t total_start_time = 0;
38off_t total_bytes = 0;
39
40#define SMB_MAXPATHLEN MAXPATHLEN
41
42/* Number of bytes to read when checking whether local and remote file are really the same file */
43#define RESUME_CHECK_SIZE 512
44#define RESUME_DOWNLOAD_OFFSET 1024
45#define RESUME_CHECK_OFFSET RESUME_DOWNLOAD_OFFSET+RESUME_CHECK_SIZE
46/* Number of bytes to read at once */
47#define SMB_DEFAULT_BLOCKSIZE 64000
48
49const char *username = NULL, *password = NULL, *workgroup = NULL;
50int nonprompt = 0, quiet = 0, dots = 0, keep_permissions = 0, verbose = 0, send_stdout = 0;
51int blocksize = SMB_DEFAULT_BLOCKSIZE;
52
53static int smb_download_file(const char *base, const char *name, int recursive, int resume, char *outfile);
54
55static int get_num_cols(void)
56{
57#ifdef TIOCGWINSZ
58 struct winsize ws;
59 if(ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) < 0) {
60 return 0;
61 }
62 return ws.ws_col;
63#else
64#warning No support for TIOCGWINSZ
65 char *cols = getenv("COLUMNS");
66 if(!cols) return 0;
67 return atoi(cols);
68#endif
69}
70
71static void change_columns(int sig)
72{
73 columns = get_num_cols();
74}
75
76static void human_readable(off_t s, char *buffer, int l)
77{
78 if(s > 1024 * 1024 * 1024) snprintf(buffer, l, "%.2fGb", 1.0 * s / (1024 * 1024 * 1024));
79 else if(s > 1024 * 1024) snprintf(buffer, l, "%.2fMb", 1.0 * s / (1024 * 1024));
80 else if(s > 1024) snprintf(buffer, l, "%.2fkb", 1.0 * s / 1024);
81 else snprintf(buffer, l, OFF_T_FORMAT"b", (OFF_T_FORMAT_CAST)s);
82}
83
84static void get_auth_data(const char *srv, const char *shr, char *wg, int wglen, char *un, int unlen, char *pw, int pwlen)
85{
86 static char hasasked = 0;
87 char *wgtmp, *usertmp;
88 char tmp[128];
89
90 if(hasasked) return;
91 hasasked = 1;
92
93 if(!nonprompt && !username) {
94 printf("Username for %s at %s [guest] ", shr, srv);
95 fgets(tmp, sizeof(tmp), stdin);
96 if(tmp[strlen(tmp)-1] == '\n')tmp[strlen(tmp)-1] = '\0';
97 strncpy(un, tmp, unlen-1);
98 } else if(username) strncpy(un, username, unlen-1);
99
100 if(!nonprompt && !password) {
101 char *prompt, *pass;
102 asprintf(&prompt, "Password for %s at %s: ", shr, srv);
103 pass = getpass(prompt);
104 free(prompt);
105 strncpy(pw, pass, pwlen-1);
106 } else if(password) strncpy(pw, password, pwlen-1);
107
108 if(workgroup)strncpy(wg, workgroup, wglen-1);
109
110 wgtmp = SMB_STRNDUP(wg, wglen);
111 usertmp = SMB_STRNDUP(un, unlen);
112 if(!quiet)printf("Using workgroup %s, %s%s\n", wgtmp, *usertmp?"user ":"guest user", usertmp);
113 free(wgtmp); free(usertmp);
114}
115
116static int smb_download_dir(const char *base, const char *name, int resume)
117{
118 char path[SMB_MAXPATHLEN];
119 int dirhandle;
120 struct smbc_dirent *dirent;
121 const char *relname = name;
122 char *tmpname;
123 struct stat remotestat;
124 snprintf(path, SMB_MAXPATHLEN-1, "%s%s%s", base, (base[0] && name[0] && name[0] != '/' && base[strlen(base)-1] != '/')?"/":"", name);
125
126 /* List files in directory and call smb_download_file on them */
127 dirhandle = smbc_opendir(path);
128 if(dirhandle < 1) {
129 if(errno == ENOTDIR) return smb_download_file(base, name, 1, resume, NULL);
130 fprintf(stderr, "Can't open directory %s: %s\n", path, strerror(errno));
131 return 0;
132 }
133
134 while(*relname == '/')relname++;
135 mkdir(relname, 0755);
136
137 tmpname = SMB_STRDUP(name);
138
139 while((dirent = smbc_readdir(dirhandle))) {
140 char *newname;
141 if(!strcmp(dirent->name, ".") || !strcmp(dirent->name, ".."))continue;
142 asprintf(&newname, "%s/%s", tmpname, dirent->name);
143 switch(dirent->smbc_type) {
144 case SMBC_DIR:
145 smb_download_dir(base, newname, resume);
146 break;
147
148 case SMBC_WORKGROUP:
149 smb_download_dir("smb://", dirent->name, resume);
150 break;
151
152 case SMBC_SERVER:
153 smb_download_dir("smb://", dirent->name, resume);
154 break;
155
156 case SMBC_FILE:
157 smb_download_file(base, newname, 1, resume, NULL);
158 break;
159
160 case SMBC_FILE_SHARE:
161 smb_download_dir(base, newname, resume);
162 break;
163
164 case SMBC_PRINTER_SHARE:
165 if(!quiet)printf("Ignoring printer share %s\n", dirent->name);
166 break;
167
168 case SMBC_COMMS_SHARE:
169 if(!quiet)printf("Ignoring comms share %s\n", dirent->name);
170 break;
171
172 case SMBC_IPC_SHARE:
173 if(!quiet)printf("Ignoring ipc$ share %s\n", dirent->name);
174 break;
175
176 default:
177 fprintf(stderr, "Ignoring file '%s' of type '%d'\n", newname, dirent->smbc_type);
178 break;
179 }
180 free(newname);
181 }
182 free(tmpname);
183
184 if(keep_permissions) {
185 if(smbc_fstat(dirhandle, &remotestat) < 0) {
186 fprintf(stderr, "Unable to get stats on %s on remote server\n", path);
187 smbc_closedir(dirhandle);
188 return 0;
189 }
190
191 if(chmod(relname, remotestat.st_mode) < 0) {
192 fprintf(stderr, "Unable to change mode of local dir %s to %o\n", relname, remotestat.st_mode);
193 smbc_closedir(dirhandle);
194 return 0;
195 }
196 }
197
198 smbc_closedir(dirhandle);
199 return 1;
200}
201
202static char *print_time(long t)
203{
204 static char buffer[100];
205 int secs, mins, hours;
206 if(t < -1) {
207 strncpy(buffer, "Unknown", sizeof(buffer));
208 return buffer;
209 }
210
211 secs = (int)t % 60;
212 mins = (int)t / 60 % 60;
213 hours = (int)t / (60 * 60);
214 snprintf(buffer, sizeof(buffer)-1, "%02d:%02d:%02d", hours, mins, secs);
215 return buffer;
216}
217
218static void print_progress(const char *name, time_t start, time_t now, off_t start_pos, off_t pos, off_t total)
219{
220 double avg = 0.0;
221 long eta = -1;
222 double prcnt = 0.0;
223 char hpos[20], htotal[20], havg[20];
224 char *status, *filename;
225 int len;
226 if(now - start)avg = 1.0 * (pos - start_pos) / (now - start);
227 eta = (total - pos) / avg;
228 if(total)prcnt = 100.0 * pos / total;
229
230 human_readable(pos, hpos, sizeof(hpos));
231 human_readable(total, htotal, sizeof(htotal));
232 human_readable(avg, havg, sizeof(havg));
233
234 len = asprintf(&status, "%s of %s (%.2f%%) at %s/s ETA: %s", hpos, htotal, prcnt, havg, print_time(eta));
235
236 if(columns) {
237 int required = strlen(name), available = columns - len - strlen("[] ");
238 if(required > available) asprintf(&filename, "...%s", name + required - available + 3);
239 else filename = SMB_STRNDUP(name, available);
240 } else filename = SMB_STRDUP(name);
241
242 fprintf(stderr, "\r[%s] %s", filename, status);
243
244 free(filename); free(status);
245}
246
247static int smb_download_file(const char *base, const char *name, int recursive, int resume, char *outfile) {
248 int remotehandle, localhandle;
249 time_t start_time = time(NULL);
250 const char *newpath;
251 char path[SMB_MAXPATHLEN];
252 char checkbuf[2][RESUME_CHECK_SIZE];
253 char *readbuf = NULL;
254 off_t offset_download = 0, offset_check = 0, curpos = 0, start_offset = 0;
255 struct stat localstat, remotestat;
256
257 snprintf(path, SMB_MAXPATHLEN-1, "%s%s%s", base, (*base && *name && name[0] != '/' && base[strlen(base)-1] != '/')?"/":"", name);
258
259 remotehandle = smbc_open(path, O_RDONLY, 0755);
260
261 if(remotehandle < 0) {
262 switch(errno) {
263 case EISDIR:
264 if(!recursive) {
265 fprintf(stderr, "%s is a directory. Specify -R to download recursively\n", path);
266 return 0;
267 }
268 smb_download_dir(base, name, resume);
269 return 0;
270
271 case ENOENT:
272 fprintf(stderr, "%s can't be found on the remote server\n", path);
273 return 0;
274
275 case ENOMEM:
276 fprintf(stderr, "Not enough memory\n");
277 exit(1);
278 return 0;
279
280 case ENODEV:
281 fprintf(stderr, "The share name used in %s does not exist\n", path);
282 return 0;
283
284 case EACCES:
285 fprintf(stderr, "You don't have enough permissions to access %s\n", path);
286 return 0;
287
288 default:
289 perror("smbc_open");
290 return 0;
291 }
292 }
293
294 if(smbc_fstat(remotehandle, &remotestat) < 0) {
295 fprintf(stderr, "Can't stat %s: %s\n", path, strerror(errno));
296 return 0;
297 }
298
299 if(outfile) newpath = outfile;
300 else if(!name[0]) {
301 newpath = strrchr(base, '/');
302 if(newpath)newpath++; else newpath = base;
303 } else newpath = name;
304
305 if(newpath[0] == '/')newpath++;
306
307 /* Open local file and, if necessary, resume */
308 if(!send_stdout) {
309 localhandle = open(newpath, O_CREAT | O_NONBLOCK | O_RDWR | (!resume?O_EXCL:0), 0755);
310 if(localhandle < 0) {
311 fprintf(stderr, "Can't open %s: %s\n", newpath, strerror(errno));
312 smbc_close(remotehandle);
313 return 0;
314 }
315
316 fstat(localhandle, &localstat);
317
318 start_offset = localstat.st_size;
319
320 if(localstat.st_size && localstat.st_size == remotestat.st_size) {
321 if(verbose)fprintf(stderr, "%s is already downloaded completely.\n", path);
322 else if(!quiet)fprintf(stderr, "%s\n", path);
323 smbc_close(remotehandle);
324 close(localhandle);
325 return 1;
326 }
327
328 if(localstat.st_size > RESUME_CHECK_OFFSET && remotestat.st_size > RESUME_CHECK_OFFSET) {
329 offset_download = localstat.st_size - RESUME_DOWNLOAD_OFFSET;
330 offset_check = localstat.st_size - RESUME_CHECK_OFFSET;
331 if(verbose)printf("Trying to start resume of %s at "OFF_T_FORMAT"\n"
332 "At the moment "OFF_T_FORMAT" of "OFF_T_FORMAT" bytes have been retrieved\n",
333 newpath, (OFF_T_FORMAT_CAST)offset_check,
334 (OFF_T_FORMAT_CAST)localstat.st_size,
335 (OFF_T_FORMAT_CAST)remotestat.st_size);
336 }
337
338 if(offset_check) {
339 off_t off1, off2;
340 /* First, check all bytes from offset_check to offset_download */
341 off1 = lseek(localhandle, offset_check, SEEK_SET);
342 if(off1 < 0) {
343 fprintf(stderr, "Can't seek to "OFF_T_FORMAT" in local file %s\n",
344 (OFF_T_FORMAT_CAST)offset_check, newpath);
345 smbc_close(remotehandle); close(localhandle);
346 return 0;
347 }
348
349 off2 = smbc_lseek(remotehandle, offset_check, SEEK_SET);
350 if(off2 < 0) {
351 fprintf(stderr, "Can't seek to "OFF_T_FORMAT" in remote file %s\n",
352 (OFF_T_FORMAT_CAST)offset_check, newpath);
353 smbc_close(remotehandle); close(localhandle);
354 return 0;
355 }
356
357 if(off1 != off2) {
358 fprintf(stderr, "Offset in local and remote files is different (local: "OFF_T_FORMAT", remote: "OFF_T_FORMAT")\n",
359 (OFF_T_FORMAT_CAST)off1,
360 (OFF_T_FORMAT_CAST)off2);
361 return 0;
362 }
363
364 if(smbc_read(remotehandle, checkbuf[0], RESUME_CHECK_SIZE) != RESUME_CHECK_SIZE) {
365 fprintf(stderr, "Can't read %d bytes from remote file %s\n", RESUME_CHECK_SIZE, path);
366 smbc_close(remotehandle); close(localhandle);
367 return 0;
368 }
369
370 if(read(localhandle, checkbuf[1], RESUME_CHECK_SIZE) != RESUME_CHECK_SIZE) {
371 fprintf(stderr, "Can't read %d bytes from local file %s\n", RESUME_CHECK_SIZE, name);
372 smbc_close(remotehandle); close(localhandle);
373 return 0;
374 }
375
376 if(memcmp(checkbuf[0], checkbuf[1], RESUME_CHECK_SIZE) == 0) {
377 if(verbose)printf("Current local and remote file appear to be the same. Starting download from offset "OFF_T_FORMAT"\n", (OFF_T_FORMAT_CAST)offset_download);
378 } else {
379 fprintf(stderr, "Local and remote file appear to be different, not doing resume for %s\n", path);
380 smbc_close(remotehandle); close(localhandle);
381 return 0;
382 }
383 }
384 } else {
385 localhandle = STDOUT_FILENO;
386 start_offset = 0;
387 offset_download = 0;
388 offset_check = 0;
389 }
390
391 readbuf = (char *)SMB_MALLOC(blocksize);
392
393 /* Now, download all bytes from offset_download to the end */
394 for(curpos = offset_download; curpos < remotestat.st_size; curpos+=blocksize) {
395 ssize_t bytesread = smbc_read(remotehandle, readbuf, blocksize);
396 if(bytesread < 0) {
397 fprintf(stderr, "Can't read %u bytes at offset "OFF_T_FORMAT", file %s\n", (unsigned int)blocksize, (OFF_T_FORMAT_CAST)curpos, path);
398 smbc_close(remotehandle);
399 if (localhandle != STDOUT_FILENO) close(localhandle);
400 free(readbuf);
401 return 0;
402 }
403
404 total_bytes += bytesread;
405
406 if(write(localhandle, readbuf, bytesread) < 0) {
407 fprintf(stderr, "Can't write %u bytes to local file %s at offset "OFF_T_FORMAT"\n", (unsigned int)bytesread, path, (OFF_T_FORMAT_CAST)curpos);
408 free(readbuf);
409 smbc_close(remotehandle);
410 if (localhandle != STDOUT_FILENO) close(localhandle);
411 return 0;
412 }
413
414 if(dots)fputc('.', stderr);
415 else if(!quiet) {
416 print_progress(newpath, start_time, time(NULL), start_offset, curpos, remotestat.st_size);
417 }
418 }
419
420 free(readbuf);
421
422 if(dots){
423 fputc('\n', stderr);
424 printf("%s downloaded\n", path);
425 } else if(!quiet) {
426 int i;
427 fprintf(stderr, "\r%s", path);
428 if(columns) {
429 for(i = strlen(path); i < columns; i++) {
430 fputc(' ', stderr);
431 }
432 }
433 fputc('\n', stderr);
434 }
435
436 if(keep_permissions && !send_stdout) {
437 if(fchmod(localhandle, remotestat.st_mode) < 0) {
438 fprintf(stderr, "Unable to change mode of local file %s to %o\n", path, remotestat.st_mode);
439 smbc_close(remotehandle);
440 close(localhandle);
441 return 0;
442 }
443 }
444
445 smbc_close(remotehandle);
446 if (localhandle != STDOUT_FILENO) close(localhandle);
447 return 1;
448}
449
450static void clean_exit(void)
451{
452 char bs[100];
453 human_readable(total_bytes, bs, sizeof(bs));
454 if(!quiet)fprintf(stderr, "Downloaded %s in %lu seconds\n", bs, time(NULL) - total_start_time);
455 exit(0);
456}
457
458static void signal_quit(int v)
459{
460 clean_exit();
461}
462
463static int readrcfile(const char *name, const struct poptOption long_options[])
464{
465 FILE *fd = fopen(name, "r");
466 int lineno = 0, i;
467 char var[101], val[101];
468 char found;
469 int *intdata; char **stringdata;
470 if(!fd) {
471 fprintf(stderr, "Can't open RC file %s\n", name);
472 return 1;
473 }
474
475 while(!feof(fd)) {
476 lineno++;
477 if(fscanf(fd, "%100s %100s\n", var, val) < 2) {
478 fprintf(stderr, "Can't parse line %d of %s, ignoring.\n", lineno, name);
479 continue;
480 }
481
482 found = 0;
483
484 for(i = 0; long_options[i].shortName; i++) {
485 if(!long_options[i].longName)continue;
486 if(strcmp(long_options[i].longName, var)) continue;
487 if(!long_options[i].arg)continue;
488
489 switch(long_options[i].argInfo) {
490 case POPT_ARG_NONE:
491 intdata = (int *)long_options[i].arg;
492 if(!strcmp(val, "on")) *intdata = 1;
493 else if(!strcmp(val, "off")) *intdata = 0;
494 else fprintf(stderr, "Illegal value %s for %s at line %d in %s\n", val, var, lineno, name);
495 break;
496 case POPT_ARG_INT:
497 intdata = (int *)long_options[i].arg;
498 *intdata = atoi(val);
499 break;
500 case POPT_ARG_STRING:
501 stringdata = (char **)long_options[i].arg;
502 *stringdata = SMB_STRDUP(val);
503 break;
504 default:
505 fprintf(stderr, "Invalid variable %s at line %d in %s\n", var, lineno, name);
506 break;
507 }
508
509 found = 1;
510 }
511 if(!found) {
512 fprintf(stderr, "Invalid variable %s at line %d in %s\n", var, lineno, name);
513 }
514 }
515
516 fclose(fd);
517 return 0;
518}
519
520int main(int argc, const char **argv)
521{
522 int c = 0;
523 const char *file = NULL;
524 char *rcfile = NULL;
525 struct poptOption long_options[] = {
526 {"guest", 'a', POPT_ARG_NONE, NULL, 'a', "Work as user guest" },
527 {"resume", 'r', POPT_ARG_NONE, &_resume, 0, "Automatically resume aborted files" },
528 {"recursive", 'R', POPT_ARG_NONE, &_recursive, 0, "Recursively download files" },
529 {"username", 'u', POPT_ARG_STRING, &username, 'u', "Username to use" },
530 {"password", 'p', POPT_ARG_STRING, &password, 'p', "Password to use" },
531 {"workgroup", 'w', POPT_ARG_STRING, &workgroup, 'w', "Workgroup to use (optional)" },
532 {"nonprompt", 'n', POPT_ARG_NONE, &nonprompt, 'n', "Don't ask anything (non-interactive)" },
533 {"debuglevel", 'd', POPT_ARG_INT, &debuglevel, 'd', "Debuglevel to use" },
534 {"outputfile", 'o', POPT_ARG_STRING, &outputfile, 'o', "Write downloaded data to specified file" },
535 {"stdout", 'O', POPT_ARG_NONE, &send_stdout, 'O', "Write data to stdout" },
536 {"dots", 'D', POPT_ARG_NONE, &dots, 'D', "Show dots as progress indication" },
537 {"quiet", 'q', POPT_ARG_NONE, &quiet, 'q', "Be quiet" },
538 {"verbose", 'v', POPT_ARG_NONE, &verbose, 'v', "Be verbose" },
539 {"keep-permissions", 'P', POPT_ARG_NONE, &keep_permissions, 'P', "Keep permissions" },
540 {"blocksize", 'b', POPT_ARG_INT, &blocksize, 'b', "Change number of bytes in a block"},
541 {"rcfile", 'f', POPT_ARG_STRING, NULL, 0, "Use specified rc file"},
542 POPT_AUTOHELP
543 POPT_TABLEEND
544 };
545 poptContext pc;
546
547 load_case_tables();
548
549 /* only read rcfile if it exists */
550 asprintf(&rcfile, "%s/.smbgetrc", getenv("HOME"));
551 if(access(rcfile, F_OK) == 0)
552 readrcfile(rcfile, long_options);
553 free(rcfile);
554
555#ifdef SIGWINCH
556 signal(SIGWINCH, change_columns);
557#endif
558 signal(SIGINT, signal_quit);
559 signal(SIGTERM, signal_quit);
560
561 pc = poptGetContext(argv[0], argc, argv, long_options, 0);
562
563 while((c = poptGetNextOpt(pc)) >= 0) {
564 switch(c) {
565 case 'f':
566 readrcfile(poptGetOptArg(pc), long_options);
567 break;
568 case 'a':
569 username = ""; password = "";
570 break;
571 }
572 }
573
574 if((send_stdout || outputfile) && _recursive) {
575 fprintf(stderr, "The -o or -O and -R options can not be used together.\n");
576 return 1;
577 }
578
579 if(outputfile && send_stdout) {
580 fprintf(stderr, "The -o and -O options cannot be used together.\n");
581 return 1;
582 }
583
584 if(smbc_init(get_auth_data, debuglevel) < 0) {
585 fprintf(stderr, "Unable to initialize libsmbclient\n");
586 return 1;
587 }
588
589 columns = get_num_cols();
590
591 total_start_time = time(NULL);
592
593 while ( (file = poptGetArg(pc)) ) {
594 if (!_recursive)
595 return smb_download_file(file, "", _recursive, _resume, outputfile);
596 else
597 return smb_download_dir(file, "", _resume);
598 }
599
600 clean_exit();
601
602 return 0;
603}
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