Changed flist_init() to use offsetof().
[rsync.git] / flist.c
1 /*
2    Copyright (C) Andrew Tridgell 1996
3    Copyright (C) Paul Mackerras 1996
4    Copyright (C) 2001, 2002 by Martin Pool <mbp@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
21 /** @file flist.c
22  * Generate and receive file lists
23  *
24  * @sa http://lists.samba.org/pipermail/rsync/2000-June/002351.html
25  *
26  **/
27
28 #include "rsync.h"
29
30 extern struct stats stats;
31
32 extern int verbose;
33 extern int do_progress;
34 extern int am_root;
35 extern int am_server;
36 extern int always_checksum;
37 extern int module_id;
38 extern int ignore_errors;
39 extern int numeric_ids;
40
41 extern int cvs_exclude;
42
43 extern int recurse;
44 extern char curr_dir[MAXPATHLEN];
45 extern char *files_from;
46 extern int filesfrom_fd;
47
48 extern int one_file_system;
49 extern int make_backups;
50 extern int preserve_links;
51 extern int preserve_hard_links;
52 extern int preserve_perms;
53 extern int preserve_devices;
54 extern int preserve_uid;
55 extern int preserve_gid;
56 extern int preserve_times;
57 extern int relative_paths;
58 extern int implied_dirs;
59 extern int copy_links;
60 extern int copy_unsafe_links;
61 extern int protocol_version;
62 extern int sanitize_paths;
63
64 extern int read_batch;
65 extern int write_batch;
66
67 extern struct exclude_struct **exclude_list;
68 extern struct exclude_struct **server_exclude_list;
69 extern struct exclude_struct **local_exclude_list;
70
71 int io_error;
72
73 static char empty_sum[MD4_SUM_LENGTH];
74 static unsigned int file_struct_len;
75
76 static void clean_flist(struct file_list *flist, int strip_root, int no_dups);
77 static void output_flist(struct file_list *flist);
78
79 void init_flist(void)
80 {
81         struct file_struct f;
82
83         /* Figure out how big the file_struct is without trailing padding */
84         file_struct_len = offsetof(struct file_struct, flags) + sizeof f.flags;
85 }
86
87
88 static int show_filelist_p(void)
89 {
90         return verbose && (recurse || files_from) && !am_server;
91 }
92
93 static void start_filelist_progress(char *kind)
94 {
95         rprintf(FINFO, "%s ... ", kind);
96         if ((verbose > 1) || do_progress)
97                 rprintf(FINFO, "\n");
98         rflush(FINFO);
99 }
100
101
102 static void emit_filelist_progress(const struct file_list *flist)
103 {
104         rprintf(FINFO, " %d files...\r", flist->count);
105 }
106
107
108 static void maybe_emit_filelist_progress(const struct file_list *flist)
109 {
110         if (do_progress && show_filelist_p() && ((flist->count % 100) == 0))
111                 emit_filelist_progress(flist);
112 }
113
114
115 static void finish_filelist_progress(const struct file_list *flist)
116 {
117         if (do_progress) {
118                 /* This overwrites the progress line */
119                 rprintf(FINFO, "%d file%sto consider\n",
120                         flist->count, flist->count == 1 ? " " : "s ");
121         } else
122                 rprintf(FINFO, "done\n");
123 }
124
125 void show_flist_stats(void)
126 {
127         /* Nothing yet */
128 }
129
130
131 static void list_file_entry(struct file_struct *f)
132 {
133         char perms[11];
134
135         if (!f->basename)
136                 /* this can happen if duplicate names were removed */
137                 return;
138
139         permstring(perms, f->mode);
140
141 #if SUPPORT_LINKS
142         if (preserve_links && S_ISLNK(f->mode)) {
143                 rprintf(FINFO, "%s %11.0f %s %s -> %s\n",
144                         perms,
145                         (double) f->length, timestring(f->modtime),
146                         f_name(f), f->u.link);
147         } else
148 #endif
149                 rprintf(FINFO, "%s %11.0f %s %s\n",
150                         perms,
151                         (double) f->length, timestring(f->modtime),
152                         f_name(f));
153 }
154
155
156 /**
157  * Stat either a symlink or its referent, depending on the settings of
158  * copy_links, copy_unsafe_links, etc.
159  *
160  * @retval -1 on error
161  *
162  * @retval 0 for success
163  *
164  * @post If @p path is a symlink, then @p linkbuf (of size @c
165  * MAXPATHLEN) contains the symlink target.
166  *
167  * @post @p buffer contains information about the link or the
168  * referrent as appropriate, if they exist.
169  **/
170 int readlink_stat(const char *path, STRUCT_STAT *buffer, char *linkbuf)
171 {
172 #if SUPPORT_LINKS
173         if (copy_links)
174                 return do_stat(path, buffer);
175         if (do_lstat(path, buffer) == -1)
176                 return -1;
177         if (S_ISLNK(buffer->st_mode)) {
178                 int l = readlink((char *) path, linkbuf, MAXPATHLEN - 1);
179                 if (l == -1)
180                         return -1;
181                 linkbuf[l] = 0;
182                 if (copy_unsafe_links && unsafe_symlink(linkbuf, path)) {
183                         if (verbose > 1) {
184                                 rprintf(FINFO,"copying unsafe symlink \"%s\" -> \"%s\"\n",
185                                         path, linkbuf);
186                         }
187                         return do_stat(path, buffer);
188                 }
189         }
190         return 0;
191 #else
192         return do_stat(path, buffer);
193 #endif
194 }
195
196 int link_stat(const char *path, STRUCT_STAT * buffer)
197 {
198 #if SUPPORT_LINKS
199         if (copy_links)
200                 return do_stat(path, buffer);
201         return do_lstat(path, buffer);
202 #else
203         return do_stat(path, buffer);
204 #endif
205 }
206
207 /*
208  * This function is used to check if a file should be included/excluded
209  * from the list of files based on its name and type etc.  The value of
210  * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
211  */
212 static int check_exclude_file(char *fname, int is_dir, int exclude_level)
213 {
214 #if 0 /* This currently never happens, so avoid a useless compare. */
215         if (exclude_level == NO_EXCLUDES)
216                 return 0;
217 #endif
218         if (fname) {
219                 /* never exclude '.', even if somebody does --exclude '*' */
220                 if (fname[0] == '.' && !fname[1])
221                         return 0;
222                 /* Handle the -R version of the '.' dir. */
223                 if (fname[0] == '/') {
224                         int len = strlen(fname);
225                         if (fname[len-1] == '.' && fname[len-2] == '/')
226                                 return 0;
227                 }
228         }
229         if (server_exclude_list
230          && check_exclude(server_exclude_list, fname, is_dir))
231                 return 1;
232         if (exclude_level != ALL_EXCLUDES)
233                 return 0;
234         if (exclude_list && check_exclude(exclude_list, fname, is_dir))
235                 return 1;
236         if (local_exclude_list
237          && check_exclude(local_exclude_list, fname, is_dir))
238                 return 1;
239         return 0;
240 }
241
242 /* used by the one_file_system code */
243 static dev_t filesystem_dev;
244
245 static void set_filesystem(char *fname)
246 {
247         STRUCT_STAT st;
248         if (link_stat(fname, &st) != 0)
249                 return;
250         filesystem_dev = st.st_dev;
251 }
252
253
254 static int to_wire_mode(mode_t mode)
255 {
256 #if SUPPORT_LINKS
257         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
258                 return (mode & ~(_S_IFMT)) | 0120000;
259 #endif
260         return (int) mode;
261 }
262
263 static mode_t from_wire_mode(int mode)
264 {
265         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
266                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
267         return (mode_t) mode;
268 }
269
270
271 static void send_directory(int f, struct file_list *flist, char *dir);
272
273 static char *flist_dir;
274 static int flist_dir_len;
275
276
277 /**
278  * Make sure @p flist is big enough to hold at least @p flist->count
279  * entries.
280  **/
281 void flist_expand(struct file_list *flist)
282 {
283         void *new_ptr;
284
285         if (flist->count < flist->malloced)
286                 return;
287
288         if (flist->malloced < FLIST_START)
289                 flist->malloced = FLIST_START;
290         else if (flist->malloced >= FLIST_LINEAR)
291                 flist->malloced += FLIST_LINEAR;
292         else
293                 flist->malloced *= 2;
294
295         /*
296          * In case count jumped or we are starting the list
297          * with a known size just set it.
298          */
299         if (flist->malloced < flist->count)
300                 flist->malloced = flist->count;
301
302         if (flist->files) {
303                 new_ptr = realloc_array(flist->files,
304                     struct file_struct *, flist->malloced);
305         } else {
306                 new_ptr = new_array(struct file_struct *, flist->malloced);
307         }
308
309         if (verbose >= 2) {
310                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
311                     who_am_i(),
312                     (double) sizeof flist->files[0] * flist->malloced,
313                     (new_ptr == flist->files) ? " not" : "");
314         }
315
316         flist->files = (struct file_struct **) new_ptr;
317
318         if (!flist->files)
319                 out_of_memory("flist_expand");
320 }
321
322 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
323 {
324         unsigned short flags;
325         static time_t modtime;
326         static mode_t mode;
327         static DEV64_T rdev, rdev_high;
328         static DEV64_T dev;
329         static uid_t uid;
330         static gid_t gid;
331         static char lastname[MAXPATHLEN];
332         char *fname, fbuf[MAXPATHLEN];
333         int l1, l2;
334
335         if (f == -1)
336                 return;
337
338         if (!file) {
339                 write_byte(f, 0);
340                 modtime = 0, mode = 0;
341                 rdev = 0, rdev_high = 0, dev = 0;
342                 uid = 0, gid = 0;
343                 *lastname = '\0';
344                 return;
345         }
346
347         io_write_phase = "send_file_entry";
348
349         fname = f_name_to(file, fbuf);
350
351         flags = base_flags;
352
353         if (file->mode == mode)
354                 flags |= XMIT_SAME_MODE;
355         else
356                 mode = file->mode;
357         if (preserve_devices) {
358                 if (protocol_version < 28) {
359                         if (IS_DEVICE(mode)) {
360                                 if (file->u.rdev == rdev) {
361                                         /* Set both flags to simplify the test
362                                          * when writing the data. */
363                                         flags |= XMIT_SAME_RDEV_pre28
364                                             | XMIT_SAME_HIGH_RDEV;
365                                 } else
366                                         rdev = file->u.rdev;
367                         } else
368                                 rdev = 0;
369                 } else if (IS_DEVICE(mode)) {
370                         if ((file->u.rdev & ~0xFF) == rdev_high)
371                                 flags |= XMIT_SAME_HIGH_RDEV;
372                         else {
373                                 rdev = file->u.rdev;
374                                 rdev_high = rdev & ~0xFF;
375                         }
376                 }
377         }
378         if (file->uid == uid)
379                 flags |= XMIT_SAME_UID;
380         else
381                 uid = file->uid;
382         if (file->gid == gid)
383                 flags |= XMIT_SAME_GID;
384         else
385                 gid = file->gid;
386         if (file->modtime == modtime)
387                 flags |= XMIT_SAME_TIME;
388         else
389                 modtime = file->modtime;
390
391 #if SUPPORT_HARD_LINKS
392         if (file->link_u.idev) {
393                 if (file->F_DEV == dev) {
394                         if (protocol_version >= 28)
395                                 flags |= XMIT_SAME_DEV;
396                 } else
397                         dev = file->F_DEV;
398                 flags |= XMIT_HAS_IDEV_DATA;
399         }
400 #endif
401
402         for (l1 = 0;
403             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
404             l1++) {}
405         l2 = strlen(fname+l1);
406
407         if (l1 > 0)
408                 flags |= XMIT_SAME_NAME;
409         if (l2 > 255)
410                 flags |= XMIT_LONG_NAME;
411
412         /* We must make sure we don't send a zero flag byte or the
413          * other end will terminate the flist transfer.  Note that
414          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
415          * it's harmless way to add a bit to the first flag byte. */
416         if (protocol_version >= 28) {
417                 if (!flags && !S_ISDIR(mode))
418                         flags |= XMIT_TOP_DIR;
419                 if ((flags & 0xFF00) || !flags) {
420                         flags |= XMIT_EXTENDED_FLAGS;
421                         write_byte(f, flags);
422                         write_byte(f, flags >> 8);
423                 } else
424                         write_byte(f, flags);
425         } else {
426                 if (!(flags & 0xFF) && !S_ISDIR(mode))
427                         flags |= XMIT_TOP_DIR;
428                 if (!(flags & 0xFF))
429                         flags |= XMIT_LONG_NAME;
430                 write_byte(f, flags);
431         }
432         if (flags & XMIT_SAME_NAME)
433                 write_byte(f, l1);
434         if (flags & XMIT_LONG_NAME)
435                 write_int(f, l2);
436         else
437                 write_byte(f, l2);
438         write_buf(f, fname + l1, l2);
439
440         write_longint(f, file->length);
441         if (!(flags & XMIT_SAME_TIME))
442                 write_int(f, modtime);
443         if (!(flags & XMIT_SAME_MODE))
444                 write_int(f, to_wire_mode(mode));
445         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
446                 if (!numeric_ids)
447                         add_uid(uid);
448                 write_int(f, uid);
449         }
450         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
451                 if (!numeric_ids)
452                         add_gid(gid);
453                 write_int(f, gid);
454         }
455         if (preserve_devices && IS_DEVICE(mode)) {
456                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
457                  * also off. */
458                 if (!(flags & XMIT_SAME_HIGH_RDEV))
459                         write_int(f, rdev);
460                 else if (protocol_version >= 28)
461                         write_byte(f, rdev);
462         }
463
464 #if SUPPORT_LINKS
465         if (preserve_links && S_ISLNK(mode)) {
466                 int len = strlen(file->u.link);
467                 write_int(f, len);
468                 write_buf(f, file->u.link, len);
469         }
470 #endif
471
472 #if SUPPORT_HARD_LINKS
473         if (flags & XMIT_HAS_IDEV_DATA) {
474                 if (protocol_version < 26) {
475                         /* 32-bit dev_t and ino_t */
476                         write_int(f, dev);
477                         write_int(f, file->F_INODE);
478                 } else {
479                         /* 64-bit dev_t and ino_t */
480                         if (!(flags & XMIT_SAME_DEV))
481                                 write_longint(f, dev);
482                         write_longint(f, file->F_INODE);
483                 }
484         }
485 #endif
486
487         if (always_checksum) {
488                 char *sum;
489                 if (S_ISREG(mode))
490                         sum = file->u.sum;
491                 else if (protocol_version < 28) {
492                         /* Prior to 28, we sent a useless set of nulls. */
493                         sum = empty_sum;
494                 } else
495                         sum = NULL;
496                 if (sum) {
497                         write_buf(f, sum,
498                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
499                 }
500         }
501
502         strlcpy(lastname, fname, MAXPATHLEN);
503
504         io_write_phase = "unknown";
505 }
506
507
508
509 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
510     struct file_list *flist, int f)
511 {
512         static time_t modtime;
513         static mode_t mode;
514         static DEV64_T rdev, rdev_high;
515         static DEV64_T dev;
516         static uid_t uid;
517         static gid_t gid;
518         static char lastname[MAXPATHLEN], *lastdir;
519         static int lastdir_len = -1;
520         char thisname[MAXPATHLEN];
521         unsigned int l1 = 0, l2 = 0;
522         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
523         OFF_T file_length;
524         char *basename, *dirname, *bp;
525         struct file_struct *file;
526
527         if (!fptr) {
528                 modtime = 0, mode = 0;
529                 rdev = 0, rdev_high = 0, dev = 0;
530                 uid = 0, gid = 0;
531                 *lastname = '\0';
532                 return;
533         }
534
535         if (flags & XMIT_SAME_NAME)
536                 l1 = read_byte(f);
537
538         if (flags & XMIT_LONG_NAME)
539                 l2 = read_int(f);
540         else
541                 l2 = read_byte(f);
542
543         if (l2 >= MAXPATHLEN - l1) {
544                 rprintf(FERROR,
545                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
546                         flags, l1, l2, lastname);
547                 overflow("receive_file_entry");
548         }
549
550         strlcpy(thisname, lastname, l1 + 1);
551         read_sbuf(f, &thisname[l1], l2);
552         thisname[l1 + l2] = 0;
553
554         strlcpy(lastname, thisname, MAXPATHLEN);
555
556         clean_fname(thisname);
557
558         if (sanitize_paths)
559                 sanitize_path(thisname, NULL);
560
561         if ((basename = strrchr(thisname, '/')) != NULL) {
562                 dirname_len = ++basename - thisname; /* counts future '\0' */
563                 if (lastdir_len == dirname_len - 1
564                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
565                         dirname = lastdir;
566                         dirname_len = 0; /* indicates no copy is needed */
567                 } else
568                         dirname = thisname;
569         } else {
570                 basename = thisname;
571                 dirname = NULL;
572                 dirname_len = 0;
573         }
574         basename_len = strlen(basename) + 1; /* count the '\0' */
575
576         file_length = read_longint(f);
577         if (!(flags & XMIT_SAME_TIME))
578                 modtime = (time_t)read_int(f);
579         if (!(flags & XMIT_SAME_MODE))
580                 mode = from_wire_mode(read_int(f));
581
582         if (preserve_uid && !(flags & XMIT_SAME_UID))
583                 uid = (uid_t)read_int(f);
584         if (preserve_gid && !(flags & XMIT_SAME_GID))
585                 gid = (gid_t)read_int(f);
586
587         if (preserve_devices) {
588                 if (protocol_version < 28) {
589                         if (IS_DEVICE(mode)) {
590                                 if (!(flags & XMIT_SAME_RDEV_pre28))
591                                         rdev = (DEV64_T)read_int(f);
592                         } else
593                                 rdev = 0;
594                 } else if (IS_DEVICE(mode)) {
595                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
596                                 rdev = (DEV64_T)read_int(f);
597                                 rdev_high = rdev & ~0xFF;
598                         } else
599                                 rdev = rdev_high | (DEV64_T)read_byte(f);
600                 }
601         }
602
603 #if SUPPORT_LINKS
604         if (preserve_links && S_ISLNK(mode)) {
605                 linkname_len = read_int(f) + 1; /* count the '\0' */
606                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
607                         rprintf(FERROR, "overflow: linkname_len=%d\n",
608                                 linkname_len - 1);
609                         overflow("receive_file_entry");
610                 }
611         }
612         else
613 #endif
614                 linkname_len = 0;
615
616         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
617
618         alloc_len = file_struct_len + dirname_len + basename_len
619                   + linkname_len + sum_len;
620         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
621
622         file = *fptr = (struct file_struct *)bp;
623         memset(bp, 0, file_struct_len);
624         bp += file_struct_len;
625
626         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
627         file->modtime = modtime;
628         file->length = file_length;
629         file->mode = mode;
630         file->uid = uid;
631         file->gid = gid;
632
633         if (dirname_len) {
634                 file->dirname = lastdir = bp;
635                 lastdir_len = dirname_len - 1;
636                 memcpy(bp, dirname, dirname_len - 1);
637                 bp += dirname_len;
638                 bp[-1] = '\0';
639         } else if (dirname)
640                 file->dirname = dirname;
641
642         file->basename = bp;
643         memcpy(bp, basename, basename_len);
644         bp += basename_len;
645
646         if (preserve_devices && IS_DEVICE(mode))
647                 file->u.rdev = rdev;
648
649 #if SUPPORT_LINKS
650         if (linkname_len) {
651                 file->u.link = bp;
652                 read_sbuf(f, bp, linkname_len - 1);
653                 if (sanitize_paths)
654                         sanitize_path(bp, lastdir);
655                 bp += linkname_len;
656         }
657 #endif
658
659 #if SUPPORT_HARD_LINKS
660         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
661                 flags |= XMIT_HAS_IDEV_DATA;
662         if (flags & XMIT_HAS_IDEV_DATA && flist->hlink_pool) {
663                 INO64_T inode;
664                 file->link_u.idev = pool_talloc(flist->hlink_pool,
665                     struct idev, 1, "inode_table");
666                 if (protocol_version < 26) {
667                         dev = read_int(f);
668                         inode = read_int(f);
669                 } else {
670                         if (!(flags & XMIT_SAME_DEV))
671                                 dev = read_longint(f);
672                         inode = read_longint(f);
673                 }
674                 if (flist->hlink_pool) {
675                         file->F_INODE = inode;
676                         file->F_DEV = dev;
677                 }
678         }
679 #endif
680
681         if (always_checksum) {
682                 char *sum;
683                 if (sum_len) {
684                         file->u.sum = sum = bp;
685                         /*bp += sum_len;*/
686                 } else if (protocol_version < 28) {
687                         /* Prior to 28, we get a useless set of nulls. */
688                         sum = empty_sum;
689                 } else
690                         sum = NULL;
691                 if (sum) {
692                         read_buf(f, sum,
693                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
694                 }
695         }
696
697         if (!preserve_perms) {
698                 extern int orig_umask;
699                 /* set an appropriate set of permissions based on original
700                  * permissions and umask. This emulates what GNU cp does */
701                 file->mode &= ~orig_umask;
702         }
703 }
704
705
706 /**
707  * Create a file_struct for a named file by reading its stat()
708  * information and performing extensive checks against global
709  * options.
710  *
711  * @return the new file, or NULL if there was an error or this file
712  * should be excluded.
713  *
714  * @todo There is a small optimization opportunity here to avoid
715  * stat()ing the file in some circumstances, which has a certain cost.
716  * We are called immediately after doing readdir(), and so we may
717  * already know the d_type of the file.  We could for example avoid
718  * statting directories if we're not recursing, but this is not a very
719  * important case.  Some systems may not have d_type.
720  **/
721 struct file_struct *make_file(char *fname,
722     struct file_list *flist, int exclude_level)
723 {
724         static char *lastdir;
725         static int lastdir_len = -1;
726         struct file_struct *file;
727         STRUCT_STAT st;
728         char sum[SUM_LENGTH];
729         char thisname[MAXPATHLEN];
730         char linkname[MAXPATHLEN];
731         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
732         char *basename, *dirname, *bp;
733         unsigned short flags = 0;
734
735
736         if (strlcpy(thisname, fname, sizeof thisname)
737             >= sizeof thisname - flist_dir_len) {
738                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
739                 return NULL;
740         }
741         clean_fname(thisname);
742         if (sanitize_paths)
743                 sanitize_path(thisname, NULL);
744
745         memset(sum, 0, SUM_LENGTH);
746
747         if (readlink_stat(thisname, &st, linkname) != 0) {
748                 int save_errno = errno;
749                 if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
750                         /* either symlink pointing nowhere or file that
751                          * was removed during rsync run; see if excluded
752                          * before reporting an error */
753                         if (check_exclude_file(thisname, 0, exclude_level)) {
754                                 /* file is excluded anyway, ignore silently */
755                                 return NULL;
756                         }
757                 }
758                 io_error |= IOERR_GENERAL;
759                 rprintf(FERROR, "readlink %s failed: %s\n",
760                         full_fname(thisname), strerror(save_errno));
761                 return NULL;
762         }
763
764         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
765         if (exclude_level == NO_EXCLUDES)
766                 goto skip_excludes;
767
768         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
769                 rprintf(FINFO, "skipping directory %s\n", thisname);
770                 return NULL;
771         }
772
773         /* We only care about directories because we need to avoid recursing
774          * into a mount-point directory, not to avoid copying a symlinked
775          * file if -L (or similar) was specified. */
776         if (one_file_system && st.st_dev != filesystem_dev
777             && S_ISDIR(st.st_mode))
778                 flags |= FLAG_MOUNT_POINT;
779
780         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
781                 return NULL;
782
783         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
784                 return NULL;
785
786 skip_excludes:
787
788         if (verbose > 2) {
789                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
790                         who_am_i(), thisname, exclude_level);
791         }
792
793         if ((basename = strrchr(thisname, '/')) != NULL) {
794                 dirname_len = ++basename - thisname; /* counts future '\0' */
795                 if (lastdir_len == dirname_len - 1
796                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
797                         dirname = lastdir;
798                         dirname_len = 0; /* indicates no copy is needed */
799                 } else
800                         dirname = thisname;
801         } else {
802                 basename = thisname;
803                 dirname = NULL;
804                 dirname_len = 0;
805         }
806         basename_len = strlen(basename) + 1; /* count the '\0' */
807
808 #if SUPPORT_LINKS
809         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
810 #else
811         linkname_len = 0;
812 #endif
813
814         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
815
816         alloc_len = file_struct_len + dirname_len + basename_len
817             + linkname_len + sum_len;
818         if (flist) {
819                 bp = pool_alloc(flist->file_pool, alloc_len,
820                     "receive_file_entry");
821         } else {
822                 if (!(bp = new_array(char, alloc_len)))
823                         out_of_memory("receive_file_entry");
824         }
825
826         file = (struct file_struct *)bp;
827         memset(bp, 0, file_struct_len);
828         bp += file_struct_len;
829
830         file->flags = flags;
831         file->modtime = st.st_mtime;
832         file->length = st.st_size;
833         file->mode = st.st_mode;
834         file->uid = st.st_uid;
835         file->gid = st.st_gid;
836
837 #if SUPPORT_HARD_LINKS
838         if (flist && flist->hlink_pool) {
839                 if (protocol_version < 28) {
840                         if (S_ISREG(st.st_mode))
841                                 file->link_u.idev = pool_talloc(
842                                     flist->hlink_pool, struct idev, 1,
843                                     "inode_table");
844                 } else {
845                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
846                                 file->link_u.idev = pool_talloc(
847                                     flist->hlink_pool, struct idev, 1,
848                                     "inode_table");
849                 }
850         }
851         if (file->link_u.idev) {
852                 file->F_DEV = st.st_dev;
853                 file->F_INODE = st.st_ino;
854         }
855 #endif
856
857         if (dirname_len) {
858                 file->dirname = lastdir = bp;
859                 lastdir_len = dirname_len - 1;
860                 memcpy(bp, dirname, dirname_len - 1);
861                 bp += dirname_len;
862                 bp[-1] = '\0';
863         } else if (dirname)
864                 file->dirname = dirname;
865
866         file->basename = bp;
867         memcpy(bp, basename, basename_len);
868         bp += basename_len;
869
870 #ifdef HAVE_STRUCT_STAT_ST_RDEV
871         if (preserve_devices && IS_DEVICE(st.st_mode))
872                 file->u.rdev = st.st_rdev;
873 #endif
874
875 #if SUPPORT_LINKS
876         if (linkname_len) {
877                 file->u.link = bp;
878                 memcpy(bp, linkname, linkname_len);
879                 bp += linkname_len;
880         }
881 #endif
882
883         if (sum_len) {
884                 file->u.sum = bp;
885                 file_checksum(thisname, bp, st.st_size);
886                 /*bp += sum_len;*/
887         }
888
889         file->basedir = flist_dir;
890
891         if (!S_ISDIR(st.st_mode))
892                 stats.total_size += st.st_size;
893
894         return file;
895 }
896
897
898 void send_file_name(int f, struct file_list *flist, char *fname,
899                     int recursive, unsigned short base_flags)
900 {
901         struct file_struct *file;
902         char fbuf[MAXPATHLEN];
903         extern int delete_excluded;
904
905         /* f is set to -1 when calculating deletion file list */
906         file = make_file(fname, flist,
907             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
908
909         if (!file)
910                 return;
911
912         maybe_emit_filelist_progress(flist);
913
914         flist_expand(flist);
915
916         if (write_batch)
917                 file->flags |= FLAG_TOP_DIR;
918
919         if (file->basename[0]) {
920                 flist->files[flist->count++] = file;
921                 send_file_entry(file, f, base_flags);
922         }
923
924         if (recursive && S_ISDIR(file->mode)
925             && !(file->flags & FLAG_MOUNT_POINT)) {
926                 struct exclude_struct **last_exclude_list = local_exclude_list;
927                 send_directory(f, flist, f_name_to(file, fbuf));
928                 local_exclude_list = last_exclude_list;
929                 return;
930         }
931 }
932
933
934 static void send_directory(int f, struct file_list *flist, char *dir)
935 {
936         DIR *d;
937         struct dirent *di;
938         char fname[MAXPATHLEN];
939         unsigned int offset;
940         char *p;
941
942         d = opendir(dir);
943         if (!d) {
944                 io_error |= IOERR_GENERAL;
945                 rprintf(FERROR, "opendir %s failed: %s\n",
946                         full_fname(dir), strerror(errno));
947                 return;
948         }
949
950         offset = strlcpy(fname, dir, MAXPATHLEN);
951         p = fname + offset;
952         if (offset >= MAXPATHLEN || p[-1] != '/') {
953                 if (offset >= MAXPATHLEN - 1) {
954                         io_error |= IOERR_GENERAL;
955                         rprintf(FERROR, "skipping long-named directory: %s\n",
956                                 full_fname(fname));
957                         closedir(d);
958                         return;
959                 }
960                 *p++ = '/';
961                 offset++;
962         }
963
964         local_exclude_list = NULL;
965
966         if (cvs_exclude) {
967                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
968                     < MAXPATHLEN - offset)
969                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
970                 else {
971                         io_error |= IOERR_GENERAL;
972                         rprintf(FINFO,
973                                 "cannot cvs-exclude in long-named directory %s\n",
974                                 full_fname(fname));
975                 }
976         }
977
978         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
979                 char *dname = d_name(di);
980                 if (dname[0] == '.' && (dname[1] == '\0'
981                     || (dname[1] == '.' && dname[2] == '\0')))
982                         continue;
983                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
984                         send_file_name(f, flist, fname, recurse, 0);
985                 else {
986                         io_error |= IOERR_GENERAL;
987                         rprintf(FINFO,
988                                 "cannot send long-named file %s\n",
989                                 full_fname(fname));
990                 }
991         }
992         if (errno) {
993                 io_error |= IOERR_GENERAL;
994                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
995                         dir, errno, strerror(errno));
996         }
997
998         if (local_exclude_list)
999                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1000
1001         closedir(d);
1002 }
1003
1004
1005 /**
1006  * The delete_files() function in receiver.c sets f to -1 so that we just
1007  * construct the file list in memory without sending it over the wire.  It
1008  * also has the side-effect of ignoring user-excludes if delete_excluded
1009  * is set (so that the delete list includes user-excluded files).
1010  **/
1011 struct file_list *send_file_list(int f, int argc, char *argv[])
1012 {
1013         int l;
1014         STRUCT_STAT st;
1015         char *p, *dir, olddir[sizeof curr_dir];
1016         char lastpath[MAXPATHLEN] = "";
1017         struct file_list *flist;
1018         int64 start_write;
1019         int use_ff_fd = 0;
1020
1021         if (show_filelist_p() && f != -1)
1022                 start_filelist_progress("building file list");
1023
1024         start_write = stats.total_written;
1025
1026         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1027             "send_file_list");
1028
1029         if (f != -1) {
1030                 io_start_buffering_out(f);
1031                 if (filesfrom_fd >= 0) {
1032                         if (argv[0] && !push_dir(argv[0])) {
1033                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1034                                         full_fname(argv[0]), strerror(errno));
1035                                 exit_cleanup(RERR_FILESELECT);
1036                         }
1037                         use_ff_fd = 1;
1038                 }
1039         }
1040
1041         while (1) {
1042                 char fname2[MAXPATHLEN];
1043                 char *fname = fname2;
1044
1045                 if (use_ff_fd) {
1046                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1047                                 break;
1048                         sanitize_path(fname, NULL);
1049                 } else {
1050                         if (argc-- == 0)
1051                                 break;
1052                         strlcpy(fname, *argv++, MAXPATHLEN);
1053                         if (sanitize_paths)
1054                                 sanitize_path(fname, NULL);
1055                 }
1056
1057                 l = strlen(fname);
1058                 if (fname[l - 1] == '/') {
1059                         if (l == 2 && fname[0] == '.') {
1060                                 /* Turn "./" into just "." rather than "./." */
1061                                 fname[1] = '\0';
1062                         } else if (l < MAXPATHLEN) {
1063                                 fname[l++] = '.';
1064                                 fname[l] = '\0';
1065                         }
1066                 }
1067
1068                 if (link_stat(fname, &st) != 0) {
1069                         if (f != -1) {
1070                                 io_error |= IOERR_GENERAL;
1071                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1072                                         full_fname(fname), strerror(errno));
1073                         }
1074                         continue;
1075                 }
1076
1077                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1078                         rprintf(FINFO, "skipping directory %s\n", fname);
1079                         continue;
1080                 }
1081
1082                 dir = NULL;
1083                 olddir[0] = '\0';
1084
1085                 if (!relative_paths) {
1086                         p = strrchr(fname, '/');
1087                         if (p) {
1088                                 *p = 0;
1089                                 if (p == fname)
1090                                         dir = "/";
1091                                 else
1092                                         dir = fname;
1093                                 fname = p + 1;
1094                         }
1095                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1096                         /* this ensures we send the intermediate directories,
1097                            thus getting their permissions right */
1098                         char *lp = lastpath, *fn = fname, *slash = fname;
1099                         *p = 0;
1100                         /* Skip any initial directories in our path that we
1101                          * have in common with lastpath. */
1102                         while (*fn && *lp == *fn) {
1103                                 if (*fn == '/')
1104                                         slash = fn;
1105                                 lp++, fn++;
1106                         }
1107                         *p = '/';
1108                         if (fn != p || (*lp && *lp != '/')) {
1109                                 int copy_links_saved = copy_links;
1110                                 int recurse_saved = recurse;
1111                                 copy_links = copy_unsafe_links;
1112                                 /* set recurse to 1 to prevent make_file
1113                                  * from ignoring directory, but still
1114                                  * turn off the recursive parameter to
1115                                  * send_file_name */
1116                                 recurse = 1;
1117                                 while ((slash = strchr(slash+1, '/')) != 0) {
1118                                         *slash = 0;
1119                                         send_file_name(f, flist, fname, 0, 0);
1120                                         *slash = '/';
1121                                 }
1122                                 copy_links = copy_links_saved;
1123                                 recurse = recurse_saved;
1124                                 *p = 0;
1125                                 strlcpy(lastpath, fname, sizeof lastpath);
1126                                 *p = '/';
1127                         }
1128                 }
1129
1130                 if (!*fname)
1131                         fname = ".";
1132
1133                 if (dir && *dir) {
1134                         static char *lastdir;
1135                         static int lastdir_len;
1136
1137                         strcpy(olddir, curr_dir); /* can't overflow */
1138
1139                         if (!push_dir(dir)) {
1140                                 io_error |= IOERR_GENERAL;
1141                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1142                                         full_fname(dir), strerror(errno));
1143                                 continue;
1144                         }
1145
1146                         if (lastdir && strcmp(lastdir, dir) == 0) {
1147                                 flist_dir = lastdir;
1148                                 flist_dir_len = lastdir_len;
1149                         } else {
1150                                 flist_dir = lastdir = strdup(dir);
1151                                 flist_dir_len = lastdir_len = strlen(dir);
1152                         }
1153                 }
1154
1155                 if (one_file_system)
1156                         set_filesystem(fname);
1157
1158                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1159
1160                 if (olddir[0]) {
1161                         flist_dir = NULL;
1162                         flist_dir_len = 0;
1163                         if (!pop_dir(olddir)) {
1164                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1165                                         full_fname(dir), strerror(errno));
1166                                 exit_cleanup(RERR_FILESELECT);
1167                         }
1168                 }
1169         }
1170
1171         if (f != -1) {
1172                 send_file_entry(NULL, f, 0);
1173
1174                 if (show_filelist_p())
1175                         finish_filelist_progress(flist);
1176         }
1177
1178         if (flist->hlink_pool) {
1179                 pool_destroy(flist->hlink_pool);
1180                 flist->hlink_pool = NULL;
1181         }
1182
1183         clean_flist(flist, 0, 0);
1184
1185         if (f != -1) {
1186                 /* Now send the uid/gid list. This was introduced in
1187                  * protocol version 15 */
1188                 send_uid_list(f);
1189
1190                 /* send the io_error flag */
1191                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1192
1193                 io_end_buffering();
1194                 stats.flist_size = stats.total_written - start_write;
1195                 stats.num_files = flist->count;
1196                 if (write_batch)
1197                         write_batch_flist_info(flist->count, flist->files);
1198         }
1199
1200         if (verbose > 3)
1201                 output_flist(flist);
1202
1203         if (verbose > 2)
1204                 rprintf(FINFO, "send_file_list done\n");
1205
1206         return flist;
1207 }
1208
1209
1210 struct file_list *recv_file_list(int f)
1211 {
1212         struct file_list *flist;
1213         unsigned short flags;
1214         int64 start_read;
1215         extern int list_only;
1216
1217         if (show_filelist_p())
1218                 start_filelist_progress("receiving file list");
1219
1220         start_read = stats.total_read;
1221
1222         flist = flist_new(WITH_HLINK, "recv_file_list");
1223
1224         flist->count = 0;
1225         flist->malloced = 1000;
1226         flist->files = new_array(struct file_struct *, flist->malloced);
1227         if (!flist->files)
1228                 goto oom;
1229
1230
1231         while ((flags = read_byte(f)) != 0) {
1232                 int i = flist->count;
1233
1234                 flist_expand(flist);
1235
1236                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1237                         flags |= read_byte(f) << 8;
1238                 receive_file_entry(&flist->files[i], flags, flist, f);
1239
1240                 if (S_ISREG(flist->files[i]->mode))
1241                         stats.total_size += flist->files[i]->length;
1242
1243                 flist->count++;
1244
1245                 maybe_emit_filelist_progress(flist);
1246
1247                 if (verbose > 2) {
1248                         rprintf(FINFO, "recv_file_name(%s)\n",
1249                                 f_name(flist->files[i]));
1250                 }
1251         }
1252         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1253
1254         if (verbose > 2)
1255                 rprintf(FINFO, "received %d names\n", flist->count);
1256
1257         if (show_filelist_p())
1258                 finish_filelist_progress(flist);
1259
1260         clean_flist(flist, relative_paths, 1);
1261
1262         if (f != -1) {
1263                 /* Now send the uid/gid list. This was introduced in
1264                  * protocol version 15 */
1265                 recv_uid_list(f, flist);
1266
1267                 if (!read_batch) {
1268                         /* Recv the io_error flag */
1269                         if (lp_ignore_errors(module_id) || ignore_errors)
1270                                 read_int(f);
1271                         else
1272                                 io_error |= read_int(f);
1273                 }
1274         }
1275
1276         if (verbose > 3)
1277                 output_flist(flist);
1278
1279         if (list_only) {
1280                 int i;
1281                 for (i = 0; i < flist->count; i++)
1282                         list_file_entry(flist->files[i]);
1283         }
1284
1285         if (verbose > 2)
1286                 rprintf(FINFO, "recv_file_list done\n");
1287
1288         stats.flist_size = stats.total_read - start_read;
1289         stats.num_files = flist->count;
1290
1291         return flist;
1292
1293 oom:
1294         out_of_memory("recv_file_list");
1295         return NULL;            /* not reached */
1296 }
1297
1298
1299 int file_compare(struct file_struct **file1, struct file_struct **file2)
1300 {
1301         struct file_struct *f1 = *file1;
1302         struct file_struct *f2 = *file2;
1303
1304         if (!f1->basename && !f2->basename)
1305                 return 0;
1306         if (!f1->basename)
1307                 return -1;
1308         if (!f2->basename)
1309                 return 1;
1310         if (f1->dirname == f2->dirname)
1311                 return u_strcmp(f1->basename, f2->basename);
1312         return f_name_cmp(f1, f2);
1313 }
1314
1315
1316 int flist_find(struct file_list *flist, struct file_struct *f)
1317 {
1318         int low = 0, high = flist->count - 1;
1319
1320         while (high >= 0 && !flist->files[high]->basename) high--;
1321
1322         if (high < 0)
1323                 return -1;
1324
1325         while (low != high) {
1326                 int mid = (low + high) / 2;
1327                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1328                 if (ret == 0)
1329                         return flist_up(flist, mid);
1330                 if (ret > 0)
1331                         high = mid;
1332                 else
1333                         low = mid + 1;
1334         }
1335
1336         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1337                 return flist_up(flist, low);
1338         return -1;
1339 }
1340
1341 /*
1342  * Free up any resources a file_struct has allocated
1343  * and clear the file.
1344  */
1345 void clear_file(int i, struct file_list *flist)
1346 {
1347         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1348                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1349         memset(flist->files[i], 0, file_struct_len);
1350 }
1351
1352
1353 /*
1354  * allocate a new file list
1355  */
1356 struct file_list *flist_new(int with_hlink, char *msg)
1357 {
1358         struct file_list *flist;
1359
1360         flist = new(struct file_list);
1361         if (!flist)
1362                 out_of_memory(msg);
1363
1364         memset(flist, 0, sizeof (struct file_list));
1365
1366         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1367             out_of_memory, POOL_INTERN)))
1368                 out_of_memory(msg);
1369
1370 #if SUPPORT_HARD_LINKS
1371         if (with_hlink && preserve_hard_links) {
1372                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1373                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1374                         out_of_memory(msg);
1375         }
1376 #endif
1377
1378         return flist;
1379 }
1380
1381 /*
1382  * free up all elements in a flist
1383  */
1384 void flist_free(struct file_list *flist)
1385 {
1386         pool_destroy(flist->file_pool);
1387         pool_destroy(flist->hlink_pool);
1388         free(flist->files);
1389         free(flist);
1390 }
1391
1392
1393 /*
1394  * This routine ensures we don't have any duplicate names in our file list.
1395  * duplicate names can cause corruption because of the pipelining
1396  */
1397 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1398 {
1399         int i, prev_i = 0;
1400
1401         if (!flist || flist->count == 0)
1402                 return;
1403
1404         qsort(flist->files, flist->count,
1405             sizeof flist->files[0], (int (*)()) file_compare);
1406
1407         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1408                 if (flist->files[i]->basename) {
1409                         prev_i = i;
1410                         break;
1411                 }
1412         }
1413         while (++i < flist->count) {
1414                 if (!flist->files[i]->basename)
1415                         continue;
1416                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1417                         if (verbose > 1 && !am_server) {
1418                                 rprintf(FINFO,
1419                                         "removing duplicate name %s from file list %d\n",
1420                                         f_name(flist->files[i]), i);
1421                         }
1422                         /* Make sure that if we unduplicate '.', that we don't
1423                          * lose track of a user-specified starting point (or
1424                          * else deletions will mysteriously fail with -R). */
1425                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1426                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1427
1428                         clear_file(i, flist);
1429                 } else
1430                         prev_i = i;
1431         }
1432
1433         if (strip_root) {
1434                 /* we need to strip off the root directory in the case
1435                    of relative paths, but this must be done _after_
1436                    the sorting phase */
1437                 for (i = 0; i < flist->count; i++) {
1438                         if (flist->files[i]->dirname &&
1439                             flist->files[i]->dirname[0] == '/') {
1440                                 memmove(&flist->files[i]->dirname[0],
1441                                         &flist->files[i]->dirname[1],
1442                                         strlen(flist->files[i]->dirname));
1443                         }
1444
1445                         if (flist->files[i]->dirname &&
1446                             !flist->files[i]->dirname[0]) {
1447                                 flist->files[i]->dirname = NULL;
1448                         }
1449                 }
1450         }
1451 }
1452
1453 static void output_flist(struct file_list *flist)
1454 {
1455         char uidbuf[16], gidbuf[16];
1456         struct file_struct *file;
1457         int i;
1458
1459         for (i = 0; i < flist->count; i++) {
1460                 file = flist->files[i];
1461                 if (am_root && preserve_uid)
1462                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1463                 else
1464                         *uidbuf = '\0';
1465                 if (preserve_gid && file->gid != GID_NONE)
1466                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1467                 else
1468                         *gidbuf = '\0';
1469                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1470                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1471                         NS(file->basename), (int) file->mode,
1472                         (double) file->length, uidbuf, gidbuf);
1473         }
1474 }
1475
1476
1477 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1478
1479 /* Compare the names of two file_struct entities, just like strcmp()
1480  * would do if it were operating on the joined strings.  We assume
1481  * that there are no 0-length strings.
1482  */
1483 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1484 {
1485         int dif;
1486         const uchar *c1, *c2;
1487         enum fnc_state state1, state2;
1488
1489         if (!f1 || !f1->basename) {
1490                 if (!f2 || !f2->basename)
1491                         return 0;
1492                 return -1;
1493         }
1494         if (!f2 || !f2->basename)
1495                 return 1;
1496
1497         if (!(c1 = (uchar*)f1->dirname)) {
1498                 state1 = fnc_BASE;
1499                 c1 = (uchar*)f1->basename;
1500         } else
1501                 state1 = fnc_DIR;
1502         if (!(c2 = (uchar*)f2->dirname)) {
1503                 state2 = fnc_BASE;
1504                 c2 = (uchar*)f2->basename;
1505         } else
1506                 state2 = fnc_DIR;
1507
1508         while (1) {
1509                 if ((dif = (int)*c1 - (int)*c2) != 0)
1510                         break;
1511                 if (!*++c1) {
1512                         switch (state1) {
1513                         case fnc_DIR:
1514                                 state1 = fnc_SLASH;
1515                                 c1 = (uchar*)"/";
1516                                 break;
1517                         case fnc_SLASH:
1518                                 state1 = fnc_BASE;
1519                                 c1 = (uchar*)f1->basename;
1520                                 break;
1521                         case fnc_BASE:
1522                                 break;
1523                         }
1524                 }
1525                 if (!*++c2) {
1526                         switch (state2) {
1527                         case fnc_DIR:
1528                                 state2 = fnc_SLASH;
1529                                 c2 = (uchar*)"/";
1530                                 break;
1531                         case fnc_SLASH:
1532                                 state2 = fnc_BASE;
1533                                 c2 = (uchar*)f2->basename;
1534                                 break;
1535                         case fnc_BASE:
1536                                 if (!*c1)
1537                                         return 0;
1538                                 break;
1539                         }
1540                 }
1541         }
1542
1543         return dif;
1544 }
1545
1546
1547 /* Return a copy of the full filename of a flist entry, using the indicated
1548  * buffer.  No size-checking is done because we checked the size when creating
1549  * the file_struct entry.
1550  */
1551 char *f_name_to(struct file_struct *f, char *fbuf)
1552 {
1553         if (!f || !f->basename)
1554                 return NULL;
1555
1556         if (f->dirname) {
1557                 int len = strlen(f->dirname);
1558                 memcpy(fbuf, f->dirname, len);
1559                 fbuf[len] = '/';
1560                 strcpy(fbuf + len + 1, f->basename);
1561         } else
1562                 strcpy(fbuf, f->basename);
1563         return fbuf;
1564 }
1565
1566
1567 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1568  */
1569 char *f_name(struct file_struct *f)
1570 {
1571         static char names[5][MAXPATHLEN];
1572         static unsigned int n;
1573
1574         n = (n + 1) % (sizeof names / sizeof names[0]);
1575
1576         return f_name_to(f, names[n]);
1577 }