Fixed a bug in the sending of rdev when the high-bits match.
[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 am_daemon;
37 extern int always_checksum;
38 extern int module_id;
39 extern int ignore_errors;
40 extern int numeric_ids;
41
42 extern int cvs_exclude;
43
44 extern int recurse;
45 extern char curr_dir[MAXPATHLEN];
46 extern char *files_from;
47 extern int filesfrom_fd;
48
49 extern int one_file_system;
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 & ~(DEV64_T)0xFF) == rdev_high) {
371                                 flags |= XMIT_SAME_HIGH_RDEV;
372                                 rdev = file->u.rdev;
373                         } else {
374                                 rdev = file->u.rdev;
375                                 rdev_high = rdev & ~(DEV64_T)0xFF;
376                         }
377                 }
378         }
379         if (file->uid == uid)
380                 flags |= XMIT_SAME_UID;
381         else
382                 uid = file->uid;
383         if (file->gid == gid)
384                 flags |= XMIT_SAME_GID;
385         else
386                 gid = file->gid;
387         if (file->modtime == modtime)
388                 flags |= XMIT_SAME_TIME;
389         else
390                 modtime = file->modtime;
391
392 #if SUPPORT_HARD_LINKS
393         if (file->link_u.idev) {
394                 if (file->F_DEV == dev) {
395                         if (protocol_version >= 28)
396                                 flags |= XMIT_SAME_DEV;
397                 } else
398                         dev = file->F_DEV;
399                 flags |= XMIT_HAS_IDEV_DATA;
400         }
401 #endif
402
403         for (l1 = 0;
404             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
405             l1++) {}
406         l2 = strlen(fname+l1);
407
408         if (l1 > 0)
409                 flags |= XMIT_SAME_NAME;
410         if (l2 > 255)
411                 flags |= XMIT_LONG_NAME;
412
413         /* We must make sure we don't send a zero flag byte or the
414          * other end will terminate the flist transfer.  Note that
415          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
416          * it's harmless way to add a bit to the first flag byte. */
417         if (protocol_version >= 28) {
418                 if (!flags && !S_ISDIR(mode))
419                         flags |= XMIT_TOP_DIR;
420                 if ((flags & 0xFF00) || !flags) {
421                         flags |= XMIT_EXTENDED_FLAGS;
422                         write_byte(f, flags);
423                         write_byte(f, flags >> 8);
424                 } else
425                         write_byte(f, flags);
426         } else {
427                 if (!(flags & 0xFF) && !S_ISDIR(mode))
428                         flags |= XMIT_TOP_DIR;
429                 if (!(flags & 0xFF))
430                         flags |= XMIT_LONG_NAME;
431                 write_byte(f, flags);
432         }
433         if (flags & XMIT_SAME_NAME)
434                 write_byte(f, l1);
435         if (flags & XMIT_LONG_NAME)
436                 write_int(f, l2);
437         else
438                 write_byte(f, l2);
439         write_buf(f, fname + l1, l2);
440
441         write_longint(f, file->length);
442         if (!(flags & XMIT_SAME_TIME))
443                 write_int(f, modtime);
444         if (!(flags & XMIT_SAME_MODE))
445                 write_int(f, to_wire_mode(mode));
446         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
447                 if (!numeric_ids)
448                         add_uid(uid);
449                 write_int(f, uid);
450         }
451         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
452                 if (!numeric_ids)
453                         add_gid(gid);
454                 write_int(f, gid);
455         }
456         if (preserve_devices && IS_DEVICE(mode)) {
457                 /* If XMIT_SAME_HIGH_RDEV is off, XMIT_SAME_RDEV_pre28 is
458                  * also off. */
459                 if (!(flags & XMIT_SAME_HIGH_RDEV))
460                         write_int(f, rdev);
461                 else if (protocol_version >= 28)
462                         write_byte(f, rdev);
463         }
464
465 #if SUPPORT_LINKS
466         if (preserve_links && S_ISLNK(mode)) {
467                 int len = strlen(file->u.link);
468                 write_int(f, len);
469                 write_buf(f, file->u.link, len);
470         }
471 #endif
472
473 #if SUPPORT_HARD_LINKS
474         if (flags & XMIT_HAS_IDEV_DATA) {
475                 if (protocol_version < 26) {
476                         /* 32-bit dev_t and ino_t */
477                         write_int(f, dev);
478                         write_int(f, file->F_INODE);
479                 } else {
480                         /* 64-bit dev_t and ino_t */
481                         if (!(flags & XMIT_SAME_DEV))
482                                 write_longint(f, dev);
483                         write_longint(f, file->F_INODE);
484                 }
485         }
486 #endif
487
488         if (always_checksum) {
489                 char *sum;
490                 if (S_ISREG(mode))
491                         sum = file->u.sum;
492                 else if (protocol_version < 28) {
493                         /* Prior to 28, we sent a useless set of nulls. */
494                         sum = empty_sum;
495                 } else
496                         sum = NULL;
497                 if (sum) {
498                         write_buf(f, sum,
499                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
500                 }
501         }
502
503         strlcpy(lastname, fname, MAXPATHLEN);
504
505         io_write_phase = "unknown";
506 }
507
508
509
510 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
511     struct file_list *flist, int f)
512 {
513         static time_t modtime;
514         static mode_t mode;
515         static DEV64_T rdev, rdev_high;
516         static DEV64_T dev;
517         static uid_t uid;
518         static gid_t gid;
519         static char lastname[MAXPATHLEN], *lastdir;
520         static int lastdir_len = -1;
521         char thisname[MAXPATHLEN];
522         unsigned int l1 = 0, l2 = 0;
523         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
524         OFF_T file_length;
525         char *basename, *dirname, *bp;
526         struct file_struct *file;
527
528         if (!fptr) {
529                 modtime = 0, mode = 0;
530                 rdev = 0, rdev_high = 0, dev = 0;
531                 uid = 0, gid = 0;
532                 *lastname = '\0';
533                 return;
534         }
535
536         if (flags & XMIT_SAME_NAME)
537                 l1 = read_byte(f);
538
539         if (flags & XMIT_LONG_NAME)
540                 l2 = read_int(f);
541         else
542                 l2 = read_byte(f);
543
544         if (l2 >= MAXPATHLEN - l1) {
545                 rprintf(FERROR,
546                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
547                         flags, l1, l2, lastname);
548                 overflow("receive_file_entry");
549         }
550
551         strlcpy(thisname, lastname, l1 + 1);
552         read_sbuf(f, &thisname[l1], l2);
553         thisname[l1 + l2] = 0;
554
555         strlcpy(lastname, thisname, MAXPATHLEN);
556
557         clean_fname(thisname);
558
559         if (sanitize_paths)
560                 sanitize_path(thisname, NULL);
561
562         if ((basename = strrchr(thisname, '/')) != NULL) {
563                 dirname_len = ++basename - thisname; /* counts future '\0' */
564                 if (lastdir_len == dirname_len - 1
565                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
566                         dirname = lastdir;
567                         dirname_len = 0; /* indicates no copy is needed */
568                 } else
569                         dirname = thisname;
570         } else {
571                 basename = thisname;
572                 dirname = NULL;
573                 dirname_len = 0;
574         }
575         basename_len = strlen(basename) + 1; /* count the '\0' */
576
577         file_length = read_longint(f);
578         if (!(flags & XMIT_SAME_TIME))
579                 modtime = (time_t)read_int(f);
580         if (!(flags & XMIT_SAME_MODE))
581                 mode = from_wire_mode(read_int(f));
582
583         if (preserve_uid && !(flags & XMIT_SAME_UID))
584                 uid = (uid_t)read_int(f);
585         if (preserve_gid && !(flags & XMIT_SAME_GID))
586                 gid = (gid_t)read_int(f);
587
588         if (preserve_devices) {
589                 if (protocol_version < 28) {
590                         if (IS_DEVICE(mode)) {
591                                 if (!(flags & XMIT_SAME_RDEV_pre28))
592                                         rdev = (DEV64_T)read_int(f);
593                         } else
594                                 rdev = 0;
595                 } else if (IS_DEVICE(mode)) {
596                         if (!(flags & XMIT_SAME_HIGH_RDEV)) {
597                                 rdev = (DEV64_T)read_int(f);
598                                 rdev_high = rdev & ~(DEV64_T)0xFF;
599                         } else
600                                 rdev = rdev_high | (DEV64_T)read_byte(f);
601                 }
602         }
603
604 #if SUPPORT_LINKS
605         if (preserve_links && S_ISLNK(mode)) {
606                 linkname_len = read_int(f) + 1; /* count the '\0' */
607                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
608                         rprintf(FERROR, "overflow: linkname_len=%d\n",
609                                 linkname_len - 1);
610                         overflow("receive_file_entry");
611                 }
612         }
613         else
614 #endif
615                 linkname_len = 0;
616
617         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
618
619         alloc_len = file_struct_len + dirname_len + basename_len
620                   + linkname_len + sum_len;
621         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
622
623         file = *fptr = (struct file_struct *)bp;
624         memset(bp, 0, file_struct_len);
625         bp += file_struct_len;
626
627         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
628         file->modtime = modtime;
629         file->length = file_length;
630         file->mode = mode;
631         file->uid = uid;
632         file->gid = gid;
633
634         if (dirname_len) {
635                 file->dirname = lastdir = bp;
636                 lastdir_len = dirname_len - 1;
637                 memcpy(bp, dirname, dirname_len - 1);
638                 bp += dirname_len;
639                 bp[-1] = '\0';
640         } else if (dirname)
641                 file->dirname = dirname;
642
643         file->basename = bp;
644         memcpy(bp, basename, basename_len);
645         bp += basename_len;
646
647         if (preserve_devices && IS_DEVICE(mode))
648                 file->u.rdev = rdev;
649
650 #if SUPPORT_LINKS
651         if (linkname_len) {
652                 file->u.link = bp;
653                 read_sbuf(f, bp, linkname_len - 1);
654                 if (sanitize_paths)
655                         sanitize_path(bp, lastdir);
656                 bp += linkname_len;
657         }
658 #endif
659
660 #if SUPPORT_HARD_LINKS
661         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
662                 flags |= XMIT_HAS_IDEV_DATA;
663         if (flags & XMIT_HAS_IDEV_DATA) {
664                 INO64_T inode;
665                 if (protocol_version < 26) {
666                         dev = read_int(f);
667                         inode = read_int(f);
668                 } else {
669                         if (!(flags & XMIT_SAME_DEV))
670                                 dev = read_longint(f);
671                         inode = read_longint(f);
672                 }
673                 if (flist->hlink_pool) {
674                         file->link_u.idev = pool_talloc(flist->hlink_pool,
675                             struct idev, 1, "inode_table");
676                         file->F_INODE = inode;
677                         file->F_DEV = dev;
678                 }
679         }
680 #endif
681
682         if (always_checksum) {
683                 char *sum;
684                 if (sum_len) {
685                         file->u.sum = sum = bp;
686                         /*bp += sum_len;*/
687                 } else if (protocol_version < 28) {
688                         /* Prior to 28, we get a useless set of nulls. */
689                         sum = empty_sum;
690                 } else
691                         sum = NULL;
692                 if (sum) {
693                         read_buf(f, sum,
694                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
695                 }
696         }
697
698         if (!preserve_perms) {
699                 extern int orig_umask;
700                 /* set an appropriate set of permissions based on original
701                  * permissions and umask. This emulates what GNU cp does */
702                 file->mode &= ~orig_umask;
703         }
704 }
705
706
707 /**
708  * Create a file_struct for a named file by reading its stat()
709  * information and performing extensive checks against global
710  * options.
711  *
712  * @return the new file, or NULL if there was an error or this file
713  * should be excluded.
714  *
715  * @todo There is a small optimization opportunity here to avoid
716  * stat()ing the file in some circumstances, which has a certain cost.
717  * We are called immediately after doing readdir(), and so we may
718  * already know the d_type of the file.  We could for example avoid
719  * statting directories if we're not recursing, but this is not a very
720  * important case.  Some systems may not have d_type.
721  **/
722 struct file_struct *make_file(char *fname,
723     struct file_list *flist, int exclude_level)
724 {
725         static char *lastdir;
726         static int lastdir_len = -1;
727         struct file_struct *file;
728         STRUCT_STAT st;
729         char sum[SUM_LENGTH];
730         char thisname[MAXPATHLEN];
731         char linkname[MAXPATHLEN];
732         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
733         char *basename, *dirname, *bp;
734         unsigned short flags = 0;
735
736         if (!flist)     /* lastdir isn't valid if flist is NULL */
737                 lastdir_len = -1;
738
739         if (strlcpy(thisname, fname, sizeof thisname)
740             >= sizeof thisname - flist_dir_len) {
741                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
742                 return NULL;
743         }
744         clean_fname(thisname);
745         if (sanitize_paths)
746                 sanitize_path(thisname, NULL);
747
748         memset(sum, 0, SUM_LENGTH);
749
750         if (readlink_stat(thisname, &st, linkname) != 0) {
751                 int save_errno = errno;
752                 if (errno == ENOENT) {
753                         enum logcode c = am_daemon && protocol_version < 28
754                             ? FERROR : FINFO;
755                         /* either symlink pointing nowhere or file that
756                          * was removed during rsync run; see if excluded
757                          * before reporting an error */
758                         if (exclude_level != NO_EXCLUDES
759                             && check_exclude_file(thisname, 0, exclude_level)) {
760                                 /* file is excluded anyway, ignore silently */
761                                 return NULL;
762                         }
763                         io_error |= IOERR_VANISHED;
764                         rprintf(c, "file has vanished: %s\n",
765                             full_fname(thisname));
766                 }
767                 else {
768                         io_error |= IOERR_GENERAL;
769                         rprintf(FERROR, "readlink %s failed: %s\n",
770                             full_fname(thisname), strerror(save_errno));
771                 }
772                 return NULL;
773         }
774
775         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
776         if (exclude_level == NO_EXCLUDES)
777                 goto skip_excludes;
778
779         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
780                 rprintf(FINFO, "skipping directory %s\n", thisname);
781                 return NULL;
782         }
783
784         /* We only care about directories because we need to avoid recursing
785          * into a mount-point directory, not to avoid copying a symlinked
786          * file if -L (or similar) was specified. */
787         if (one_file_system && st.st_dev != filesystem_dev
788             && S_ISDIR(st.st_mode))
789                 flags |= FLAG_MOUNT_POINT;
790
791         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
792                 return NULL;
793
794         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
795                 return NULL;
796
797 skip_excludes:
798
799         if (verbose > 2) {
800                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
801                         who_am_i(), thisname, exclude_level);
802         }
803
804         if ((basename = strrchr(thisname, '/')) != NULL) {
805                 dirname_len = ++basename - thisname; /* counts future '\0' */
806                 if (lastdir_len == dirname_len - 1
807                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
808                         dirname = lastdir;
809                         dirname_len = 0; /* indicates no copy is needed */
810                 } else
811                         dirname = thisname;
812         } else {
813                 basename = thisname;
814                 dirname = NULL;
815                 dirname_len = 0;
816         }
817         basename_len = strlen(basename) + 1; /* count the '\0' */
818
819 #if SUPPORT_LINKS
820         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
821 #else
822         linkname_len = 0;
823 #endif
824
825         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
826
827         alloc_len = file_struct_len + dirname_len + basename_len
828             + linkname_len + sum_len;
829         if (flist) {
830                 bp = pool_alloc(flist->file_pool, alloc_len,
831                     "receive_file_entry");
832         } else {
833                 if (!(bp = new_array(char, alloc_len)))
834                         out_of_memory("receive_file_entry");
835         }
836
837         file = (struct file_struct *)bp;
838         memset(bp, 0, file_struct_len);
839         bp += file_struct_len;
840
841         file->flags = flags;
842         file->modtime = st.st_mtime;
843         file->length = st.st_size;
844         file->mode = st.st_mode;
845         file->uid = st.st_uid;
846         file->gid = st.st_gid;
847
848 #if SUPPORT_HARD_LINKS
849         if (flist && flist->hlink_pool) {
850                 if (protocol_version < 28) {
851                         if (S_ISREG(st.st_mode))
852                                 file->link_u.idev = pool_talloc(
853                                     flist->hlink_pool, struct idev, 1,
854                                     "inode_table");
855                 } else {
856                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
857                                 file->link_u.idev = pool_talloc(
858                                     flist->hlink_pool, struct idev, 1,
859                                     "inode_table");
860                 }
861         }
862         if (file->link_u.idev) {
863                 file->F_DEV = st.st_dev;
864                 file->F_INODE = st.st_ino;
865         }
866 #endif
867
868         if (dirname_len) {
869                 file->dirname = lastdir = bp;
870                 lastdir_len = dirname_len - 1;
871                 memcpy(bp, dirname, dirname_len - 1);
872                 bp += dirname_len;
873                 bp[-1] = '\0';
874         } else if (dirname)
875                 file->dirname = dirname;
876
877         file->basename = bp;
878         memcpy(bp, basename, basename_len);
879         bp += basename_len;
880
881 #ifdef HAVE_STRUCT_STAT_ST_RDEV
882         if (preserve_devices && IS_DEVICE(st.st_mode))
883                 file->u.rdev = st.st_rdev;
884 #endif
885
886 #if SUPPORT_LINKS
887         if (linkname_len) {
888                 file->u.link = bp;
889                 memcpy(bp, linkname, linkname_len);
890                 bp += linkname_len;
891         }
892 #endif
893
894         if (sum_len) {
895                 file->u.sum = bp;
896                 file_checksum(thisname, bp, st.st_size);
897                 /*bp += sum_len;*/
898         }
899
900         file->basedir = flist_dir;
901
902         if (!S_ISDIR(st.st_mode))
903                 stats.total_size += st.st_size;
904
905         return file;
906 }
907
908
909 void send_file_name(int f, struct file_list *flist, char *fname,
910                     int recursive, unsigned short base_flags)
911 {
912         struct file_struct *file;
913         char fbuf[MAXPATHLEN];
914         extern int delete_excluded;
915
916         /* f is set to -1 when calculating deletion file list */
917         file = make_file(fname, flist,
918             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
919
920         if (!file)
921                 return;
922
923         maybe_emit_filelist_progress(flist);
924
925         flist_expand(flist);
926
927         if (write_batch)
928                 file->flags |= FLAG_TOP_DIR;
929
930         if (file->basename[0]) {
931                 flist->files[flist->count++] = file;
932                 send_file_entry(file, f, base_flags);
933         }
934
935         if (recursive && S_ISDIR(file->mode)
936             && !(file->flags & FLAG_MOUNT_POINT)) {
937                 struct exclude_struct **last_exclude_list = local_exclude_list;
938                 send_directory(f, flist, f_name_to(file, fbuf));
939                 local_exclude_list = last_exclude_list;
940                 return;
941         }
942 }
943
944
945 static void send_directory(int f, struct file_list *flist, char *dir)
946 {
947         DIR *d;
948         struct dirent *di;
949         char fname[MAXPATHLEN];
950         unsigned int offset;
951         char *p;
952
953         d = opendir(dir);
954         if (!d) {
955                 io_error |= IOERR_GENERAL;
956                 rprintf(FERROR, "opendir %s failed: %s\n",
957                         full_fname(dir), strerror(errno));
958                 return;
959         }
960
961         offset = strlcpy(fname, dir, MAXPATHLEN);
962         p = fname + offset;
963         if (offset >= MAXPATHLEN || p[-1] != '/') {
964                 if (offset >= MAXPATHLEN - 1) {
965                         io_error |= IOERR_GENERAL;
966                         rprintf(FERROR, "skipping long-named directory: %s\n",
967                                 full_fname(fname));
968                         closedir(d);
969                         return;
970                 }
971                 *p++ = '/';
972                 offset++;
973         }
974
975         local_exclude_list = NULL;
976
977         if (cvs_exclude) {
978                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
979                     < MAXPATHLEN - offset)
980                         add_exclude_file(&local_exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
981                 else {
982                         io_error |= IOERR_GENERAL;
983                         rprintf(FINFO,
984                                 "cannot cvs-exclude in long-named directory %s\n",
985                                 full_fname(fname));
986                 }
987         }
988
989         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
990                 char *dname = d_name(di);
991                 if (dname[0] == '.' && (dname[1] == '\0'
992                     || (dname[1] == '.' && dname[2] == '\0')))
993                         continue;
994                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
995                         send_file_name(f, flist, fname, recurse, 0);
996                 else {
997                         io_error |= IOERR_GENERAL;
998                         rprintf(FINFO,
999                                 "cannot send long-named file %s\n",
1000                                 full_fname(fname));
1001                 }
1002         }
1003         if (errno) {
1004                 io_error |= IOERR_GENERAL;
1005                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1006                         dir, errno, strerror(errno));
1007         }
1008
1009         if (local_exclude_list)
1010                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1011
1012         closedir(d);
1013 }
1014
1015
1016 /**
1017  * The delete_files() function in receiver.c sets f to -1 so that we just
1018  * construct the file list in memory without sending it over the wire.  It
1019  * also has the side-effect of ignoring user-excludes if delete_excluded
1020  * is set (so that the delete list includes user-excluded files).
1021  **/
1022 struct file_list *send_file_list(int f, int argc, char *argv[])
1023 {
1024         int l;
1025         STRUCT_STAT st;
1026         char *p, *dir, olddir[sizeof curr_dir];
1027         char lastpath[MAXPATHLEN] = "";
1028         struct file_list *flist;
1029         int64 start_write;
1030         int use_ff_fd = 0;
1031
1032         if (show_filelist_p() && f != -1)
1033                 start_filelist_progress("building file list");
1034
1035         start_write = stats.total_written;
1036
1037         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1038             "send_file_list");
1039
1040         if (f != -1) {
1041                 io_start_buffering_out(f);
1042                 if (filesfrom_fd >= 0) {
1043                         if (argv[0] && !push_dir(argv[0])) {
1044                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1045                                         full_fname(argv[0]), strerror(errno));
1046                                 exit_cleanup(RERR_FILESELECT);
1047                         }
1048                         use_ff_fd = 1;
1049                 }
1050         }
1051
1052         while (1) {
1053                 char fname2[MAXPATHLEN];
1054                 char *fname = fname2;
1055
1056                 if (use_ff_fd) {
1057                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1058                                 break;
1059                         sanitize_path(fname, NULL);
1060                 } else {
1061                         if (argc-- == 0)
1062                                 break;
1063                         strlcpy(fname, *argv++, MAXPATHLEN);
1064                         if (sanitize_paths)
1065                                 sanitize_path(fname, NULL);
1066                 }
1067
1068                 l = strlen(fname);
1069                 if (fname[l - 1] == '/') {
1070                         if (l == 2 && fname[0] == '.') {
1071                                 /* Turn "./" into just "." rather than "./." */
1072                                 fname[1] = '\0';
1073                         } else if (l < MAXPATHLEN) {
1074                                 fname[l++] = '.';
1075                                 fname[l] = '\0';
1076                         }
1077                 }
1078
1079                 if (link_stat(fname, &st) != 0) {
1080                         if (f != -1) {
1081                                 io_error |= IOERR_GENERAL;
1082                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1083                                         full_fname(fname), strerror(errno));
1084                         }
1085                         continue;
1086                 }
1087
1088                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1089                         rprintf(FINFO, "skipping directory %s\n", fname);
1090                         continue;
1091                 }
1092
1093                 dir = NULL;
1094                 olddir[0] = '\0';
1095
1096                 if (!relative_paths) {
1097                         p = strrchr(fname, '/');
1098                         if (p) {
1099                                 *p = 0;
1100                                 if (p == fname)
1101                                         dir = "/";
1102                                 else
1103                                         dir = fname;
1104                                 fname = p + 1;
1105                         }
1106                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1107                         /* this ensures we send the intermediate directories,
1108                            thus getting their permissions right */
1109                         char *lp = lastpath, *fn = fname, *slash = fname;
1110                         *p = 0;
1111                         /* Skip any initial directories in our path that we
1112                          * have in common with lastpath. */
1113                         while (*fn && *lp == *fn) {
1114                                 if (*fn == '/')
1115                                         slash = fn;
1116                                 lp++, fn++;
1117                         }
1118                         *p = '/';
1119                         if (fn != p || (*lp && *lp != '/')) {
1120                                 int copy_links_saved = copy_links;
1121                                 int recurse_saved = recurse;
1122                                 copy_links = copy_unsafe_links;
1123                                 /* set recurse to 1 to prevent make_file
1124                                  * from ignoring directory, but still
1125                                  * turn off the recursive parameter to
1126                                  * send_file_name */
1127                                 recurse = 1;
1128                                 while ((slash = strchr(slash+1, '/')) != 0) {
1129                                         *slash = 0;
1130                                         send_file_name(f, flist, fname, 0, 0);
1131                                         *slash = '/';
1132                                 }
1133                                 copy_links = copy_links_saved;
1134                                 recurse = recurse_saved;
1135                                 *p = 0;
1136                                 strlcpy(lastpath, fname, sizeof lastpath);
1137                                 *p = '/';
1138                         }
1139                 }
1140
1141                 if (!*fname)
1142                         fname = ".";
1143
1144                 if (dir && *dir) {
1145                         static char *lastdir;
1146                         static int lastdir_len;
1147
1148                         strcpy(olddir, curr_dir); /* can't overflow */
1149
1150                         if (!push_dir(dir)) {
1151                                 io_error |= IOERR_GENERAL;
1152                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1153                                         full_fname(dir), strerror(errno));
1154                                 continue;
1155                         }
1156
1157                         if (lastdir && strcmp(lastdir, dir) == 0) {
1158                                 flist_dir = lastdir;
1159                                 flist_dir_len = lastdir_len;
1160                         } else {
1161                                 flist_dir = lastdir = strdup(dir);
1162                                 flist_dir_len = lastdir_len = strlen(dir);
1163                         }
1164                 }
1165
1166                 if (one_file_system)
1167                         set_filesystem(fname);
1168
1169                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1170
1171                 if (olddir[0]) {
1172                         flist_dir = NULL;
1173                         flist_dir_len = 0;
1174                         if (!pop_dir(olddir)) {
1175                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1176                                         full_fname(dir), strerror(errno));
1177                                 exit_cleanup(RERR_FILESELECT);
1178                         }
1179                 }
1180         }
1181
1182         if (f != -1) {
1183                 send_file_entry(NULL, f, 0);
1184
1185                 if (show_filelist_p())
1186                         finish_filelist_progress(flist);
1187         }
1188
1189         if (flist->hlink_pool) {
1190                 pool_destroy(flist->hlink_pool);
1191                 flist->hlink_pool = NULL;
1192         }
1193
1194         clean_flist(flist, 0, 0);
1195
1196         if (f != -1) {
1197                 /* Now send the uid/gid list. This was introduced in
1198                  * protocol version 15 */
1199                 send_uid_list(f);
1200
1201                 /* send the io_error flag */
1202                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1203
1204                 io_end_buffering();
1205                 stats.flist_size = stats.total_written - start_write;
1206                 stats.num_files = flist->count;
1207                 if (write_batch)
1208                         write_batch_flist_info(flist->count, flist->files);
1209         }
1210
1211         if (verbose > 3)
1212                 output_flist(flist);
1213
1214         if (verbose > 2)
1215                 rprintf(FINFO, "send_file_list done\n");
1216
1217         return flist;
1218 }
1219
1220
1221 struct file_list *recv_file_list(int f)
1222 {
1223         struct file_list *flist;
1224         unsigned short flags;
1225         int64 start_read;
1226         extern int list_only;
1227
1228         if (show_filelist_p())
1229                 start_filelist_progress("receiving file list");
1230
1231         start_read = stats.total_read;
1232
1233         flist = flist_new(WITH_HLINK, "recv_file_list");
1234
1235         flist->count = 0;
1236         flist->malloced = 1000;
1237         flist->files = new_array(struct file_struct *, flist->malloced);
1238         if (!flist->files)
1239                 goto oom;
1240
1241
1242         while ((flags = read_byte(f)) != 0) {
1243                 int i = flist->count;
1244
1245                 flist_expand(flist);
1246
1247                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1248                         flags |= read_byte(f) << 8;
1249                 receive_file_entry(&flist->files[i], flags, flist, f);
1250
1251                 if (S_ISREG(flist->files[i]->mode))
1252                         stats.total_size += flist->files[i]->length;
1253
1254                 flist->count++;
1255
1256                 maybe_emit_filelist_progress(flist);
1257
1258                 if (verbose > 2) {
1259                         rprintf(FINFO, "recv_file_name(%s)\n",
1260                                 f_name(flist->files[i]));
1261                 }
1262         }
1263         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1264
1265         if (verbose > 2)
1266                 rprintf(FINFO, "received %d names\n", flist->count);
1267
1268         if (show_filelist_p())
1269                 finish_filelist_progress(flist);
1270
1271         clean_flist(flist, relative_paths, 1);
1272
1273         if (f != -1) {
1274                 /* Now send the uid/gid list. This was introduced in
1275                  * protocol version 15 */
1276                 recv_uid_list(f, flist);
1277
1278                 if (!read_batch) {
1279                         /* Recv the io_error flag */
1280                         if (lp_ignore_errors(module_id) || ignore_errors)
1281                                 read_int(f);
1282                         else
1283                                 io_error |= read_int(f);
1284                 }
1285         }
1286
1287         if (verbose > 3)
1288                 output_flist(flist);
1289
1290         if (list_only) {
1291                 int i;
1292                 for (i = 0; i < flist->count; i++)
1293                         list_file_entry(flist->files[i]);
1294         }
1295
1296         if (verbose > 2)
1297                 rprintf(FINFO, "recv_file_list done\n");
1298
1299         stats.flist_size = stats.total_read - start_read;
1300         stats.num_files = flist->count;
1301
1302         return flist;
1303
1304 oom:
1305         out_of_memory("recv_file_list");
1306         return NULL;            /* not reached */
1307 }
1308
1309
1310 int file_compare(struct file_struct **file1, struct file_struct **file2)
1311 {
1312         struct file_struct *f1 = *file1;
1313         struct file_struct *f2 = *file2;
1314
1315         if (!f1->basename && !f2->basename)
1316                 return 0;
1317         if (!f1->basename)
1318                 return -1;
1319         if (!f2->basename)
1320                 return 1;
1321         if (f1->dirname == f2->dirname)
1322                 return u_strcmp(f1->basename, f2->basename);
1323         return f_name_cmp(f1, f2);
1324 }
1325
1326
1327 int flist_find(struct file_list *flist, struct file_struct *f)
1328 {
1329         int low = 0, high = flist->count - 1;
1330
1331         while (high >= 0 && !flist->files[high]->basename) high--;
1332
1333         if (high < 0)
1334                 return -1;
1335
1336         while (low != high) {
1337                 int mid = (low + high) / 2;
1338                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1339                 if (ret == 0)
1340                         return flist_up(flist, mid);
1341                 if (ret > 0)
1342                         high = mid;
1343                 else
1344                         low = mid + 1;
1345         }
1346
1347         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1348                 return flist_up(flist, low);
1349         return -1;
1350 }
1351
1352 /*
1353  * Free up any resources a file_struct has allocated
1354  * and clear the file.
1355  */
1356 void clear_file(int i, struct file_list *flist)
1357 {
1358         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1359                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1360         memset(flist->files[i], 0, file_struct_len);
1361 }
1362
1363
1364 /*
1365  * allocate a new file list
1366  */
1367 struct file_list *flist_new(int with_hlink, char *msg)
1368 {
1369         struct file_list *flist;
1370
1371         flist = new(struct file_list);
1372         if (!flist)
1373                 out_of_memory(msg);
1374
1375         memset(flist, 0, sizeof (struct file_list));
1376
1377         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1378             out_of_memory, POOL_INTERN)))
1379                 out_of_memory(msg);
1380
1381 #if SUPPORT_HARD_LINKS
1382         if (with_hlink && preserve_hard_links) {
1383                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1384                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1385                         out_of_memory(msg);
1386         }
1387 #endif
1388
1389         return flist;
1390 }
1391
1392 /*
1393  * free up all elements in a flist
1394  */
1395 void flist_free(struct file_list *flist)
1396 {
1397         pool_destroy(flist->file_pool);
1398         pool_destroy(flist->hlink_pool);
1399         free(flist->files);
1400         free(flist);
1401 }
1402
1403
1404 /*
1405  * This routine ensures we don't have any duplicate names in our file list.
1406  * duplicate names can cause corruption because of the pipelining
1407  */
1408 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1409 {
1410         int i, prev_i = 0;
1411
1412         if (!flist || flist->count == 0)
1413                 return;
1414
1415         qsort(flist->files, flist->count,
1416             sizeof flist->files[0], (int (*)()) file_compare);
1417
1418         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1419                 if (flist->files[i]->basename) {
1420                         prev_i = i;
1421                         break;
1422                 }
1423         }
1424         while (++i < flist->count) {
1425                 if (!flist->files[i]->basename)
1426                         continue;
1427                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1428                         if (verbose > 1 && !am_server) {
1429                                 rprintf(FINFO,
1430                                         "removing duplicate name %s from file list %d\n",
1431                                         f_name(flist->files[i]), i);
1432                         }
1433                         /* Make sure that if we unduplicate '.', that we don't
1434                          * lose track of a user-specified starting point (or
1435                          * else deletions will mysteriously fail with -R). */
1436                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1437                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1438
1439                         clear_file(i, flist);
1440                 } else
1441                         prev_i = i;
1442         }
1443
1444         if (strip_root) {
1445                 /* we need to strip off the root directory in the case
1446                    of relative paths, but this must be done _after_
1447                    the sorting phase */
1448                 for (i = 0; i < flist->count; i++) {
1449                         if (flist->files[i]->dirname &&
1450                             flist->files[i]->dirname[0] == '/') {
1451                                 memmove(&flist->files[i]->dirname[0],
1452                                         &flist->files[i]->dirname[1],
1453                                         strlen(flist->files[i]->dirname));
1454                         }
1455
1456                         if (flist->files[i]->dirname &&
1457                             !flist->files[i]->dirname[0]) {
1458                                 flist->files[i]->dirname = NULL;
1459                         }
1460                 }
1461         }
1462 }
1463
1464 static void output_flist(struct file_list *flist)
1465 {
1466         char uidbuf[16], gidbuf[16];
1467         struct file_struct *file;
1468         int i;
1469
1470         for (i = 0; i < flist->count; i++) {
1471                 file = flist->files[i];
1472                 if (am_root && preserve_uid)
1473                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1474                 else
1475                         *uidbuf = '\0';
1476                 if (preserve_gid && file->gid != GID_NONE)
1477                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1478                 else
1479                         *gidbuf = '\0';
1480                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1481                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1482                         NS(file->basename), (int) file->mode,
1483                         (double) file->length, uidbuf, gidbuf);
1484         }
1485 }
1486
1487
1488 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1489
1490 /* Compare the names of two file_struct entities, just like strcmp()
1491  * would do if it were operating on the joined strings.  We assume
1492  * that there are no 0-length strings.
1493  */
1494 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1495 {
1496         int dif;
1497         const uchar *c1, *c2;
1498         enum fnc_state state1, state2;
1499
1500         if (!f1 || !f1->basename) {
1501                 if (!f2 || !f2->basename)
1502                         return 0;
1503                 return -1;
1504         }
1505         if (!f2 || !f2->basename)
1506                 return 1;
1507
1508         if (!(c1 = (uchar*)f1->dirname)) {
1509                 state1 = fnc_BASE;
1510                 c1 = (uchar*)f1->basename;
1511         } else
1512                 state1 = fnc_DIR;
1513         if (!(c2 = (uchar*)f2->dirname)) {
1514                 state2 = fnc_BASE;
1515                 c2 = (uchar*)f2->basename;
1516         } else
1517                 state2 = fnc_DIR;
1518
1519         while (1) {
1520                 if ((dif = (int)*c1 - (int)*c2) != 0)
1521                         break;
1522                 if (!*++c1) {
1523                         switch (state1) {
1524                         case fnc_DIR:
1525                                 state1 = fnc_SLASH;
1526                                 c1 = (uchar*)"/";
1527                                 break;
1528                         case fnc_SLASH:
1529                                 state1 = fnc_BASE;
1530                                 c1 = (uchar*)f1->basename;
1531                                 break;
1532                         case fnc_BASE:
1533                                 break;
1534                         }
1535                 }
1536                 if (!*++c2) {
1537                         switch (state2) {
1538                         case fnc_DIR:
1539                                 state2 = fnc_SLASH;
1540                                 c2 = (uchar*)"/";
1541                                 break;
1542                         case fnc_SLASH:
1543                                 state2 = fnc_BASE;
1544                                 c2 = (uchar*)f2->basename;
1545                                 break;
1546                         case fnc_BASE:
1547                                 if (!*c1)
1548                                         return 0;
1549                                 break;
1550                         }
1551                 }
1552         }
1553
1554         return dif;
1555 }
1556
1557
1558 /* Return a copy of the full filename of a flist entry, using the indicated
1559  * buffer.  No size-checking is done because we checked the size when creating
1560  * the file_struct entry.
1561  */
1562 char *f_name_to(struct file_struct *f, char *fbuf)
1563 {
1564         if (!f || !f->basename)
1565                 return NULL;
1566
1567         if (f->dirname) {
1568                 int len = strlen(f->dirname);
1569                 memcpy(fbuf, f->dirname, len);
1570                 fbuf[len] = '/';
1571                 strcpy(fbuf + len + 1, f->basename);
1572         } else
1573                 strcpy(fbuf, f->basename);
1574         return fbuf;
1575 }
1576
1577
1578 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1579  */
1580 char *f_name(struct file_struct *f)
1581 {
1582         static char names[5][MAXPATHLEN];
1583         static unsigned int n;
1584
1585         n = (n + 1) % (sizeof names / sizeof names[0]);
1586
1587         return f_name_to(f, names[n]);
1588 }