Use the new XFLG_* flags to call the add_exclude*() functions.
[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 dev_t dev, rdev;
328         static uint32 rdev_major;
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                 dev = rdev = makedev(0, 0);
342                 rdev_major = 0;
343                 uid = 0, gid = 0;
344                 *lastname = '\0';
345                 return;
346         }
347
348         io_write_phase = "send_file_entry";
349
350         fname = f_name_to(file, fbuf);
351
352         flags = base_flags;
353
354         if (file->mode == mode)
355                 flags |= XMIT_SAME_MODE;
356         else
357                 mode = file->mode;
358         if (preserve_devices) {
359                 if (protocol_version < 28) {
360                         if (IS_DEVICE(mode)) {
361                                 if (file->u.rdev == rdev)
362                                         flags |= XMIT_SAME_RDEV_pre28;
363                                 else
364                                         rdev = file->u.rdev;
365                         } else
366                                 rdev = makedev(0, 0);
367                 } else if (IS_DEVICE(mode)) {
368                         rdev = file->u.rdev;
369                         if ((uint32)major(rdev) == rdev_major)
370                                 flags |= XMIT_SAME_RDEV_MAJOR;
371                         else
372                                 rdev_major = major(rdev);
373                         if ((uint32)minor(rdev) <= 0xFFu)
374                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
375                 }
376         }
377         if (file->uid == uid)
378                 flags |= XMIT_SAME_UID;
379         else
380                 uid = file->uid;
381         if (file->gid == gid)
382                 flags |= XMIT_SAME_GID;
383         else
384                 gid = file->gid;
385         if (file->modtime == modtime)
386                 flags |= XMIT_SAME_TIME;
387         else
388                 modtime = file->modtime;
389
390 #if SUPPORT_HARD_LINKS
391         if (file->link_u.idev) {
392                 if (file->F_DEV == dev) {
393                         if (protocol_version >= 28)
394                                 flags |= XMIT_SAME_DEV;
395                 } else
396                         dev = file->F_DEV;
397                 flags |= XMIT_HAS_IDEV_DATA;
398         }
399 #endif
400
401         for (l1 = 0;
402             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
403             l1++) {}
404         l2 = strlen(fname+l1);
405
406         if (l1 > 0)
407                 flags |= XMIT_SAME_NAME;
408         if (l2 > 255)
409                 flags |= XMIT_LONG_NAME;
410
411         /* We must make sure we don't send a zero flag byte or the
412          * other end will terminate the flist transfer.  Note that
413          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
414          * it's harmless way to add a bit to the first flag byte. */
415         if (protocol_version >= 28) {
416                 if (!flags && !S_ISDIR(mode))
417                         flags |= XMIT_TOP_DIR;
418                 if ((flags & 0xFF00) || !flags) {
419                         flags |= XMIT_EXTENDED_FLAGS;
420                         write_byte(f, flags);
421                         write_byte(f, flags >> 8);
422                 } else
423                         write_byte(f, flags);
424         } else {
425                 if (!(flags & 0xFF) && !S_ISDIR(mode))
426                         flags |= XMIT_TOP_DIR;
427                 if (!(flags & 0xFF))
428                         flags |= XMIT_LONG_NAME;
429                 write_byte(f, flags);
430         }
431         if (flags & XMIT_SAME_NAME)
432                 write_byte(f, l1);
433         if (flags & XMIT_LONG_NAME)
434                 write_int(f, l2);
435         else
436                 write_byte(f, l2);
437         write_buf(f, fname + l1, l2);
438
439         write_longint(f, file->length);
440         if (!(flags & XMIT_SAME_TIME))
441                 write_int(f, modtime);
442         if (!(flags & XMIT_SAME_MODE))
443                 write_int(f, to_wire_mode(mode));
444         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
445                 if (!numeric_ids)
446                         add_uid(uid);
447                 write_int(f, uid);
448         }
449         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
450                 if (!numeric_ids)
451                         add_gid(gid);
452                 write_int(f, gid);
453         }
454         if (preserve_devices && IS_DEVICE(mode)) {
455                 if (protocol_version < 28) {
456                         if (!(flags & XMIT_SAME_RDEV_pre28))
457                                 write_int(f, (int)rdev);
458                 } else {
459                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
460                                 write_int(f, major(rdev));
461                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
462                                 write_byte(f, minor(rdev));
463                         else
464                                 write_int(f, minor(rdev));
465                 }
466         }
467
468 #if SUPPORT_LINKS
469         if (preserve_links && S_ISLNK(mode)) {
470                 int len = strlen(file->u.link);
471                 write_int(f, len);
472                 write_buf(f, file->u.link, len);
473         }
474 #endif
475
476 #if SUPPORT_HARD_LINKS
477         if (flags & XMIT_HAS_IDEV_DATA) {
478                 if (protocol_version >= 28) {
479                         /* major/minor dev_t and 64-bit ino_t */
480                         if (!(flags & XMIT_SAME_DEV)) {
481                                 write_int(f, major(dev));
482                                 write_int(f, minor(dev));
483                         }
484                         write_longint(f, file->F_INODE);
485                 } else if (protocol_version < 26) {
486                         /* 32-bit dev_t and ino_t */
487                         write_int(f, dev);
488                         write_int(f, file->F_INODE);
489                 } else {
490                         /* 64-bit dev_t and ino_t */
491                         write_longint(f, dev);
492                         write_longint(f, file->F_INODE);
493                 }
494         }
495 #endif
496
497         if (always_checksum) {
498                 char *sum;
499                 if (S_ISREG(mode))
500                         sum = file->u.sum;
501                 else if (protocol_version < 28) {
502                         /* Prior to 28, we sent a useless set of nulls. */
503                         sum = empty_sum;
504                 } else
505                         sum = NULL;
506                 if (sum) {
507                         write_buf(f, sum,
508                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
509                 }
510         }
511
512         strlcpy(lastname, fname, MAXPATHLEN);
513
514         io_write_phase = "unknown";
515 }
516
517
518
519 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
520     struct file_list *flist, int f)
521 {
522         static time_t modtime;
523         static mode_t mode;
524         static dev_t dev, rdev;
525         static uint32 rdev_major;
526         static uid_t uid;
527         static gid_t gid;
528         static char lastname[MAXPATHLEN], *lastdir;
529         static int lastdir_len = -1;
530         char thisname[MAXPATHLEN];
531         unsigned int l1 = 0, l2 = 0;
532         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
533         OFF_T file_length;
534         char *basename, *dirname, *bp;
535         struct file_struct *file;
536
537         if (!fptr) {
538                 modtime = 0, mode = 0;
539                 dev = rdev = makedev(0, 0);
540                 rdev_major = 0;
541                 uid = 0, gid = 0;
542                 *lastname = '\0';
543                 return;
544         }
545
546         if (flags & XMIT_SAME_NAME)
547                 l1 = read_byte(f);
548
549         if (flags & XMIT_LONG_NAME)
550                 l2 = read_int(f);
551         else
552                 l2 = read_byte(f);
553
554         if (l2 >= MAXPATHLEN - l1) {
555                 rprintf(FERROR,
556                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
557                         flags, l1, l2, lastname);
558                 overflow("receive_file_entry");
559         }
560
561         strlcpy(thisname, lastname, l1 + 1);
562         read_sbuf(f, &thisname[l1], l2);
563         thisname[l1 + l2] = 0;
564
565         strlcpy(lastname, thisname, MAXPATHLEN);
566
567         clean_fname(thisname);
568
569         if (sanitize_paths)
570                 sanitize_path(thisname, NULL);
571
572         if ((basename = strrchr(thisname, '/')) != NULL) {
573                 dirname_len = ++basename - thisname; /* counts future '\0' */
574                 if (lastdir_len == dirname_len - 1
575                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
576                         dirname = lastdir;
577                         dirname_len = 0; /* indicates no copy is needed */
578                 } else
579                         dirname = thisname;
580         } else {
581                 basename = thisname;
582                 dirname = NULL;
583                 dirname_len = 0;
584         }
585         basename_len = strlen(basename) + 1; /* count the '\0' */
586
587         file_length = read_longint(f);
588         if (!(flags & XMIT_SAME_TIME))
589                 modtime = (time_t)read_int(f);
590         if (!(flags & XMIT_SAME_MODE))
591                 mode = from_wire_mode(read_int(f));
592
593         if (preserve_uid && !(flags & XMIT_SAME_UID))
594                 uid = (uid_t)read_int(f);
595         if (preserve_gid && !(flags & XMIT_SAME_GID))
596                 gid = (gid_t)read_int(f);
597
598         if (preserve_devices) {
599                 if (protocol_version < 28) {
600                         if (IS_DEVICE(mode)) {
601                                 if (!(flags & XMIT_SAME_RDEV_pre28))
602                                         rdev = (dev_t)read_int(f);
603                         } else
604                                 rdev = makedev(0, 0);
605                 } else if (IS_DEVICE(mode)) {
606                         uint32 rdev_minor;
607                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
608                                 rdev_major = read_int(f);
609                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
610                                 rdev_minor = read_byte(f);
611                         else
612                                 rdev_minor = read_int(f);
613                         rdev = makedev(rdev_major, rdev_minor);
614                 }
615         }
616
617 #if SUPPORT_LINKS
618         if (preserve_links && S_ISLNK(mode)) {
619                 linkname_len = read_int(f) + 1; /* count the '\0' */
620                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
621                         rprintf(FERROR, "overflow: linkname_len=%d\n",
622                                 linkname_len - 1);
623                         overflow("receive_file_entry");
624                 }
625         }
626         else
627 #endif
628                 linkname_len = 0;
629
630         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
631
632         alloc_len = file_struct_len + dirname_len + basename_len
633                   + linkname_len + sum_len;
634         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
635
636         file = *fptr = (struct file_struct *)bp;
637         memset(bp, 0, file_struct_len);
638         bp += file_struct_len;
639
640         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
641         file->modtime = modtime;
642         file->length = file_length;
643         file->mode = mode;
644         file->uid = uid;
645         file->gid = gid;
646
647         if (dirname_len) {
648                 file->dirname = lastdir = bp;
649                 lastdir_len = dirname_len - 1;
650                 memcpy(bp, dirname, dirname_len - 1);
651                 bp += dirname_len;
652                 bp[-1] = '\0';
653         } else if (dirname)
654                 file->dirname = dirname;
655
656         file->basename = bp;
657         memcpy(bp, basename, basename_len);
658         bp += basename_len;
659
660         if (preserve_devices && IS_DEVICE(mode))
661                 file->u.rdev = rdev;
662
663 #if SUPPORT_LINKS
664         if (linkname_len) {
665                 file->u.link = bp;
666                 read_sbuf(f, bp, linkname_len - 1);
667                 if (sanitize_paths)
668                         sanitize_path(bp, lastdir);
669                 bp += linkname_len;
670         }
671 #endif
672
673 #if SUPPORT_HARD_LINKS
674         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
675                 flags |= XMIT_HAS_IDEV_DATA;
676         if (flags & XMIT_HAS_IDEV_DATA) {
677                 INO64_T inode;
678                 if (protocol_version >= 28) {
679                         if (!(flags & XMIT_SAME_DEV)) {
680                                 uint32 dev_major = read_int(f);
681                                 uint32 dev_minor = read_int(f);
682                                 dev = makedev(dev_major, dev_minor);
683                         }
684                         inode = read_longint(f);
685                 } else if (protocol_version < 26) {
686                         dev = (dev_t)read_int(f);
687                         inode = read_int(f);
688                 } else {
689                         dev = (dev_t)read_longint(f);
690                         inode = read_longint(f);
691                 }
692                 if (flist->hlink_pool) {
693                         file->link_u.idev = pool_talloc(flist->hlink_pool,
694                             struct idev, 1, "inode_table");
695                         file->F_INODE = inode;
696                         file->F_DEV = dev;
697                 }
698         }
699 #endif
700
701         if (always_checksum) {
702                 char *sum;
703                 if (sum_len) {
704                         file->u.sum = sum = bp;
705                         /*bp += sum_len;*/
706                 } else if (protocol_version < 28) {
707                         /* Prior to 28, we get a useless set of nulls. */
708                         sum = empty_sum;
709                 } else
710                         sum = NULL;
711                 if (sum) {
712                         read_buf(f, sum,
713                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
714                 }
715         }
716
717         if (!preserve_perms) {
718                 extern int orig_umask;
719                 /* set an appropriate set of permissions based on original
720                  * permissions and umask. This emulates what GNU cp does */
721                 file->mode &= ~orig_umask;
722         }
723 }
724
725
726 /**
727  * Create a file_struct for a named file by reading its stat()
728  * information and performing extensive checks against global
729  * options.
730  *
731  * @return the new file, or NULL if there was an error or this file
732  * should be excluded.
733  *
734  * @todo There is a small optimization opportunity here to avoid
735  * stat()ing the file in some circumstances, which has a certain cost.
736  * We are called immediately after doing readdir(), and so we may
737  * already know the d_type of the file.  We could for example avoid
738  * statting directories if we're not recursing, but this is not a very
739  * important case.  Some systems may not have d_type.
740  **/
741 struct file_struct *make_file(char *fname,
742     struct file_list *flist, int exclude_level)
743 {
744         static char *lastdir;
745         static int lastdir_len = -1;
746         struct file_struct *file;
747         STRUCT_STAT st;
748         char sum[SUM_LENGTH];
749         char thisname[MAXPATHLEN];
750         char linkname[MAXPATHLEN];
751         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
752         char *basename, *dirname, *bp;
753         unsigned short flags = 0;
754
755         if (!flist)     /* lastdir isn't valid if flist is NULL */
756                 lastdir_len = -1;
757
758         if (strlcpy(thisname, fname, sizeof thisname)
759             >= sizeof thisname - flist_dir_len) {
760                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
761                 return NULL;
762         }
763         clean_fname(thisname);
764         if (sanitize_paths)
765                 sanitize_path(thisname, NULL);
766
767         memset(sum, 0, SUM_LENGTH);
768
769         if (readlink_stat(thisname, &st, linkname) != 0) {
770                 int save_errno = errno;
771                 if (errno == ENOENT) {
772                         enum logcode c = am_daemon && protocol_version < 28
773                             ? FERROR : FINFO;
774                         /* either symlink pointing nowhere or file that
775                          * was removed during rsync run; see if excluded
776                          * before reporting an error */
777                         if (exclude_level != NO_EXCLUDES
778                             && check_exclude_file(thisname, 0, exclude_level)) {
779                                 /* file is excluded anyway, ignore silently */
780                                 return NULL;
781                         }
782                         io_error |= IOERR_VANISHED;
783                         rprintf(c, "file has vanished: %s\n",
784                             full_fname(thisname));
785                 }
786                 else {
787                         io_error |= IOERR_GENERAL;
788                         rprintf(FERROR, "readlink %s failed: %s\n",
789                             full_fname(thisname), strerror(save_errno));
790                 }
791                 return NULL;
792         }
793
794         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
795         if (exclude_level == NO_EXCLUDES)
796                 goto skip_excludes;
797
798         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
799                 rprintf(FINFO, "skipping directory %s\n", thisname);
800                 return NULL;
801         }
802
803         /* We only care about directories because we need to avoid recursing
804          * into a mount-point directory, not to avoid copying a symlinked
805          * file if -L (or similar) was specified. */
806         if (one_file_system && st.st_dev != filesystem_dev
807             && S_ISDIR(st.st_mode))
808                 flags |= FLAG_MOUNT_POINT;
809
810         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
811                 return NULL;
812
813         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
814                 return NULL;
815
816 skip_excludes:
817
818         if (verbose > 2) {
819                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
820                         who_am_i(), thisname, exclude_level);
821         }
822
823         if ((basename = strrchr(thisname, '/')) != NULL) {
824                 dirname_len = ++basename - thisname; /* counts future '\0' */
825                 if (lastdir_len == dirname_len - 1
826                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
827                         dirname = lastdir;
828                         dirname_len = 0; /* indicates no copy is needed */
829                 } else
830                         dirname = thisname;
831         } else {
832                 basename = thisname;
833                 dirname = NULL;
834                 dirname_len = 0;
835         }
836         basename_len = strlen(basename) + 1; /* count the '\0' */
837
838 #if SUPPORT_LINKS
839         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
840 #else
841         linkname_len = 0;
842 #endif
843
844         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
845
846         alloc_len = file_struct_len + dirname_len + basename_len
847             + linkname_len + sum_len;
848         if (flist) {
849                 bp = pool_alloc(flist->file_pool, alloc_len,
850                     "receive_file_entry");
851         } else {
852                 if (!(bp = new_array(char, alloc_len)))
853                         out_of_memory("receive_file_entry");
854         }
855
856         file = (struct file_struct *)bp;
857         memset(bp, 0, file_struct_len);
858         bp += file_struct_len;
859
860         file->flags = flags;
861         file->modtime = st.st_mtime;
862         file->length = st.st_size;
863         file->mode = st.st_mode;
864         file->uid = st.st_uid;
865         file->gid = st.st_gid;
866
867 #if SUPPORT_HARD_LINKS
868         if (flist && flist->hlink_pool) {
869                 if (protocol_version < 28) {
870                         if (S_ISREG(st.st_mode))
871                                 file->link_u.idev = pool_talloc(
872                                     flist->hlink_pool, struct idev, 1,
873                                     "inode_table");
874                 } else {
875                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
876                                 file->link_u.idev = pool_talloc(
877                                     flist->hlink_pool, struct idev, 1,
878                                     "inode_table");
879                 }
880         }
881         if (file->link_u.idev) {
882                 file->F_DEV = st.st_dev;
883                 file->F_INODE = st.st_ino;
884         }
885 #endif
886
887         if (dirname_len) {
888                 file->dirname = lastdir = bp;
889                 lastdir_len = dirname_len - 1;
890                 memcpy(bp, dirname, dirname_len - 1);
891                 bp += dirname_len;
892                 bp[-1] = '\0';
893         } else if (dirname)
894                 file->dirname = dirname;
895
896         file->basename = bp;
897         memcpy(bp, basename, basename_len);
898         bp += basename_len;
899
900 #ifdef HAVE_STRUCT_STAT_ST_RDEV
901         if (preserve_devices && IS_DEVICE(st.st_mode))
902                 file->u.rdev = st.st_rdev;
903 #endif
904
905 #if SUPPORT_LINKS
906         if (linkname_len) {
907                 file->u.link = bp;
908                 memcpy(bp, linkname, linkname_len);
909                 bp += linkname_len;
910         }
911 #endif
912
913         if (sum_len) {
914                 file->u.sum = bp;
915                 file_checksum(thisname, bp, st.st_size);
916                 /*bp += sum_len;*/
917         }
918
919         file->basedir = flist_dir;
920
921         if (!S_ISDIR(st.st_mode))
922                 stats.total_size += st.st_size;
923
924         return file;
925 }
926
927
928 void send_file_name(int f, struct file_list *flist, char *fname,
929                     int recursive, unsigned short base_flags)
930 {
931         struct file_struct *file;
932         char fbuf[MAXPATHLEN];
933         extern int delete_excluded;
934
935         /* f is set to -1 when calculating deletion file list */
936         file = make_file(fname, flist,
937             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
938
939         if (!file)
940                 return;
941
942         maybe_emit_filelist_progress(flist);
943
944         flist_expand(flist);
945
946         if (write_batch)
947                 file->flags |= FLAG_TOP_DIR;
948
949         if (file->basename[0]) {
950                 flist->files[flist->count++] = file;
951                 send_file_entry(file, f, base_flags);
952         }
953
954         if (recursive && S_ISDIR(file->mode)
955             && !(file->flags & FLAG_MOUNT_POINT)) {
956                 struct exclude_struct **last_exclude_list = local_exclude_list;
957                 send_directory(f, flist, f_name_to(file, fbuf));
958                 local_exclude_list = last_exclude_list;
959                 return;
960         }
961 }
962
963
964 static void send_directory(int f, struct file_list *flist, char *dir)
965 {
966         DIR *d;
967         struct dirent *di;
968         char fname[MAXPATHLEN];
969         unsigned int offset;
970         char *p;
971
972         d = opendir(dir);
973         if (!d) {
974                 io_error |= IOERR_GENERAL;
975                 rprintf(FERROR, "opendir %s failed: %s\n",
976                         full_fname(dir), strerror(errno));
977                 return;
978         }
979
980         offset = strlcpy(fname, dir, MAXPATHLEN);
981         p = fname + offset;
982         if (offset >= MAXPATHLEN || p[-1] != '/') {
983                 if (offset >= MAXPATHLEN - 1) {
984                         io_error |= IOERR_GENERAL;
985                         rprintf(FERROR, "skipping long-named directory: %s\n",
986                                 full_fname(fname));
987                         closedir(d);
988                         return;
989                 }
990                 *p++ = '/';
991                 offset++;
992         }
993
994         local_exclude_list = NULL;
995
996         if (cvs_exclude) {
997                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
998                     < MAXPATHLEN - offset) {
999                         add_exclude_file(&local_exclude_list, fname,
1000                                          XFLG_WORD_SPLIT | XFLG_NO_PREFIXES);
1001                 } else {
1002                         io_error |= IOERR_GENERAL;
1003                         rprintf(FINFO,
1004                                 "cannot cvs-exclude in long-named directory %s\n",
1005                                 full_fname(fname));
1006                 }
1007         }
1008
1009         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1010                 char *dname = d_name(di);
1011                 if (dname[0] == '.' && (dname[1] == '\0'
1012                     || (dname[1] == '.' && dname[2] == '\0')))
1013                         continue;
1014                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1015                         send_file_name(f, flist, fname, recurse, 0);
1016                 else {
1017                         io_error |= IOERR_GENERAL;
1018                         rprintf(FINFO,
1019                                 "cannot send long-named file %s\n",
1020                                 full_fname(fname));
1021                 }
1022         }
1023         if (errno) {
1024                 io_error |= IOERR_GENERAL;
1025                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1026                         dir, errno, strerror(errno));
1027         }
1028
1029         if (local_exclude_list)
1030                 free_exclude_list(&local_exclude_list); /* Zeros pointer too */
1031
1032         closedir(d);
1033 }
1034
1035
1036 /**
1037  * The delete_files() function in receiver.c sets f to -1 so that we just
1038  * construct the file list in memory without sending it over the wire.  It
1039  * also has the side-effect of ignoring user-excludes if delete_excluded
1040  * is set (so that the delete list includes user-excluded files).
1041  **/
1042 struct file_list *send_file_list(int f, int argc, char *argv[])
1043 {
1044         int l;
1045         STRUCT_STAT st;
1046         char *p, *dir, olddir[sizeof curr_dir];
1047         char lastpath[MAXPATHLEN] = "";
1048         struct file_list *flist;
1049         int64 start_write;
1050         int use_ff_fd = 0;
1051
1052         if (show_filelist_p() && f != -1)
1053                 start_filelist_progress("building file list");
1054
1055         start_write = stats.total_written;
1056
1057         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1058             "send_file_list");
1059
1060         if (f != -1) {
1061                 io_start_buffering_out(f);
1062                 if (filesfrom_fd >= 0) {
1063                         if (argv[0] && !push_dir(argv[0])) {
1064                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1065                                         full_fname(argv[0]), strerror(errno));
1066                                 exit_cleanup(RERR_FILESELECT);
1067                         }
1068                         use_ff_fd = 1;
1069                 }
1070         }
1071
1072         while (1) {
1073                 char fname2[MAXPATHLEN];
1074                 char *fname = fname2;
1075
1076                 if (use_ff_fd) {
1077                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1078                                 break;
1079                         sanitize_path(fname, NULL);
1080                 } else {
1081                         if (argc-- == 0)
1082                                 break;
1083                         strlcpy(fname, *argv++, MAXPATHLEN);
1084                         if (sanitize_paths)
1085                                 sanitize_path(fname, NULL);
1086                 }
1087
1088                 l = strlen(fname);
1089                 if (fname[l - 1] == '/') {
1090                         if (l == 2 && fname[0] == '.') {
1091                                 /* Turn "./" into just "." rather than "./." */
1092                                 fname[1] = '\0';
1093                         } else if (l < MAXPATHLEN) {
1094                                 fname[l++] = '.';
1095                                 fname[l] = '\0';
1096                         }
1097                 }
1098
1099                 if (link_stat(fname, &st) != 0) {
1100                         if (f != -1) {
1101                                 io_error |= IOERR_GENERAL;
1102                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1103                                         full_fname(fname), strerror(errno));
1104                         }
1105                         continue;
1106                 }
1107
1108                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1109                         rprintf(FINFO, "skipping directory %s\n", fname);
1110                         continue;
1111                 }
1112
1113                 dir = NULL;
1114                 olddir[0] = '\0';
1115
1116                 if (!relative_paths) {
1117                         p = strrchr(fname, '/');
1118                         if (p) {
1119                                 *p = 0;
1120                                 if (p == fname)
1121                                         dir = "/";
1122                                 else
1123                                         dir = fname;
1124                                 fname = p + 1;
1125                         }
1126                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1127                         /* this ensures we send the intermediate directories,
1128                            thus getting their permissions right */
1129                         char *lp = lastpath, *fn = fname, *slash = fname;
1130                         *p = 0;
1131                         /* Skip any initial directories in our path that we
1132                          * have in common with lastpath. */
1133                         while (*fn && *lp == *fn) {
1134                                 if (*fn == '/')
1135                                         slash = fn;
1136                                 lp++, fn++;
1137                         }
1138                         *p = '/';
1139                         if (fn != p || (*lp && *lp != '/')) {
1140                                 int copy_links_saved = copy_links;
1141                                 int recurse_saved = recurse;
1142                                 copy_links = copy_unsafe_links;
1143                                 /* set recurse to 1 to prevent make_file
1144                                  * from ignoring directory, but still
1145                                  * turn off the recursive parameter to
1146                                  * send_file_name */
1147                                 recurse = 1;
1148                                 while ((slash = strchr(slash+1, '/')) != 0) {
1149                                         *slash = 0;
1150                                         send_file_name(f, flist, fname, 0, 0);
1151                                         *slash = '/';
1152                                 }
1153                                 copy_links = copy_links_saved;
1154                                 recurse = recurse_saved;
1155                                 *p = 0;
1156                                 strlcpy(lastpath, fname, sizeof lastpath);
1157                                 *p = '/';
1158                         }
1159                 }
1160
1161                 if (!*fname)
1162                         fname = ".";
1163
1164                 if (dir && *dir) {
1165                         static char *lastdir;
1166                         static int lastdir_len;
1167
1168                         strcpy(olddir, curr_dir); /* can't overflow */
1169
1170                         if (!push_dir(dir)) {
1171                                 io_error |= IOERR_GENERAL;
1172                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1173                                         full_fname(dir), strerror(errno));
1174                                 continue;
1175                         }
1176
1177                         if (lastdir && strcmp(lastdir, dir) == 0) {
1178                                 flist_dir = lastdir;
1179                                 flist_dir_len = lastdir_len;
1180                         } else {
1181                                 flist_dir = lastdir = strdup(dir);
1182                                 flist_dir_len = lastdir_len = strlen(dir);
1183                         }
1184                 }
1185
1186                 if (one_file_system)
1187                         set_filesystem(fname);
1188
1189                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1190
1191                 if (olddir[0]) {
1192                         flist_dir = NULL;
1193                         flist_dir_len = 0;
1194                         if (!pop_dir(olddir)) {
1195                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1196                                         full_fname(dir), strerror(errno));
1197                                 exit_cleanup(RERR_FILESELECT);
1198                         }
1199                 }
1200         }
1201
1202         if (f != -1) {
1203                 send_file_entry(NULL, f, 0);
1204
1205                 if (show_filelist_p())
1206                         finish_filelist_progress(flist);
1207         }
1208
1209         if (flist->hlink_pool) {
1210                 pool_destroy(flist->hlink_pool);
1211                 flist->hlink_pool = NULL;
1212         }
1213
1214         clean_flist(flist, 0, 0);
1215
1216         if (f != -1) {
1217                 /* Now send the uid/gid list. This was introduced in
1218                  * protocol version 15 */
1219                 send_uid_list(f);
1220
1221                 /* send the io_error flag */
1222                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1223
1224                 io_end_buffering();
1225                 stats.flist_size = stats.total_written - start_write;
1226                 stats.num_files = flist->count;
1227                 if (write_batch)
1228                         write_batch_flist_info(flist->count, flist->files);
1229         }
1230
1231         if (verbose > 3)
1232                 output_flist(flist);
1233
1234         if (verbose > 2)
1235                 rprintf(FINFO, "send_file_list done\n");
1236
1237         return flist;
1238 }
1239
1240
1241 struct file_list *recv_file_list(int f)
1242 {
1243         struct file_list *flist;
1244         unsigned short flags;
1245         int64 start_read;
1246         extern int list_only;
1247
1248         if (show_filelist_p())
1249                 start_filelist_progress("receiving file list");
1250
1251         start_read = stats.total_read;
1252
1253         flist = flist_new(WITH_HLINK, "recv_file_list");
1254
1255         flist->count = 0;
1256         flist->malloced = 1000;
1257         flist->files = new_array(struct file_struct *, flist->malloced);
1258         if (!flist->files)
1259                 goto oom;
1260
1261
1262         while ((flags = read_byte(f)) != 0) {
1263                 int i = flist->count;
1264
1265                 flist_expand(flist);
1266
1267                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1268                         flags |= read_byte(f) << 8;
1269                 receive_file_entry(&flist->files[i], flags, flist, f);
1270
1271                 if (S_ISREG(flist->files[i]->mode))
1272                         stats.total_size += flist->files[i]->length;
1273
1274                 flist->count++;
1275
1276                 maybe_emit_filelist_progress(flist);
1277
1278                 if (verbose > 2) {
1279                         rprintf(FINFO, "recv_file_name(%s)\n",
1280                                 f_name(flist->files[i]));
1281                 }
1282         }
1283         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1284
1285         if (verbose > 2)
1286                 rprintf(FINFO, "received %d names\n", flist->count);
1287
1288         if (show_filelist_p())
1289                 finish_filelist_progress(flist);
1290
1291         clean_flist(flist, relative_paths, 1);
1292
1293         if (f != -1) {
1294                 /* Now send the uid/gid list. This was introduced in
1295                  * protocol version 15 */
1296                 recv_uid_list(f, flist);
1297
1298                 if (!read_batch) {
1299                         /* Recv the io_error flag */
1300                         if (lp_ignore_errors(module_id) || ignore_errors)
1301                                 read_int(f);
1302                         else
1303                                 io_error |= read_int(f);
1304                 }
1305         }
1306
1307         if (verbose > 3)
1308                 output_flist(flist);
1309
1310         if (list_only) {
1311                 int i;
1312                 for (i = 0; i < flist->count; i++)
1313                         list_file_entry(flist->files[i]);
1314         }
1315
1316         if (verbose > 2)
1317                 rprintf(FINFO, "recv_file_list done\n");
1318
1319         stats.flist_size = stats.total_read - start_read;
1320         stats.num_files = flist->count;
1321
1322         return flist;
1323
1324 oom:
1325         out_of_memory("recv_file_list");
1326         return NULL;            /* not reached */
1327 }
1328
1329
1330 int file_compare(struct file_struct **file1, struct file_struct **file2)
1331 {
1332         struct file_struct *f1 = *file1;
1333         struct file_struct *f2 = *file2;
1334
1335         if (!f1->basename && !f2->basename)
1336                 return 0;
1337         if (!f1->basename)
1338                 return -1;
1339         if (!f2->basename)
1340                 return 1;
1341         if (f1->dirname == f2->dirname)
1342                 return u_strcmp(f1->basename, f2->basename);
1343         return f_name_cmp(f1, f2);
1344 }
1345
1346
1347 int flist_find(struct file_list *flist, struct file_struct *f)
1348 {
1349         int low = 0, high = flist->count - 1;
1350
1351         while (high >= 0 && !flist->files[high]->basename) high--;
1352
1353         if (high < 0)
1354                 return -1;
1355
1356         while (low != high) {
1357                 int mid = (low + high) / 2;
1358                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1359                 if (ret == 0)
1360                         return flist_up(flist, mid);
1361                 if (ret > 0)
1362                         high = mid;
1363                 else
1364                         low = mid + 1;
1365         }
1366
1367         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1368                 return flist_up(flist, low);
1369         return -1;
1370 }
1371
1372 /*
1373  * Free up any resources a file_struct has allocated
1374  * and clear the file.
1375  */
1376 void clear_file(int i, struct file_list *flist)
1377 {
1378         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1379                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1380         memset(flist->files[i], 0, file_struct_len);
1381 }
1382
1383
1384 /*
1385  * allocate a new file list
1386  */
1387 struct file_list *flist_new(int with_hlink, char *msg)
1388 {
1389         struct file_list *flist;
1390
1391         flist = new(struct file_list);
1392         if (!flist)
1393                 out_of_memory(msg);
1394
1395         memset(flist, 0, sizeof (struct file_list));
1396
1397         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1398             out_of_memory, POOL_INTERN)))
1399                 out_of_memory(msg);
1400
1401 #if SUPPORT_HARD_LINKS
1402         if (with_hlink && preserve_hard_links) {
1403                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1404                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1405                         out_of_memory(msg);
1406         }
1407 #endif
1408
1409         return flist;
1410 }
1411
1412 /*
1413  * free up all elements in a flist
1414  */
1415 void flist_free(struct file_list *flist)
1416 {
1417         pool_destroy(flist->file_pool);
1418         pool_destroy(flist->hlink_pool);
1419         free(flist->files);
1420         free(flist);
1421 }
1422
1423
1424 /*
1425  * This routine ensures we don't have any duplicate names in our file list.
1426  * duplicate names can cause corruption because of the pipelining
1427  */
1428 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1429 {
1430         int i, prev_i = 0;
1431
1432         if (!flist || flist->count == 0)
1433                 return;
1434
1435         qsort(flist->files, flist->count,
1436             sizeof flist->files[0], (int (*)()) file_compare);
1437
1438         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1439                 if (flist->files[i]->basename) {
1440                         prev_i = i;
1441                         break;
1442                 }
1443         }
1444         while (++i < flist->count) {
1445                 if (!flist->files[i]->basename)
1446                         continue;
1447                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1448                         if (verbose > 1 && !am_server) {
1449                                 rprintf(FINFO,
1450                                         "removing duplicate name %s from file list %d\n",
1451                                         f_name(flist->files[i]), i);
1452                         }
1453                         /* Make sure that if we unduplicate '.', that we don't
1454                          * lose track of a user-specified starting point (or
1455                          * else deletions will mysteriously fail with -R). */
1456                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1457                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1458
1459                         clear_file(i, flist);
1460                 } else
1461                         prev_i = i;
1462         }
1463
1464         if (strip_root) {
1465                 /* we need to strip off the root directory in the case
1466                    of relative paths, but this must be done _after_
1467                    the sorting phase */
1468                 for (i = 0; i < flist->count; i++) {
1469                         if (flist->files[i]->dirname &&
1470                             flist->files[i]->dirname[0] == '/') {
1471                                 memmove(&flist->files[i]->dirname[0],
1472                                         &flist->files[i]->dirname[1],
1473                                         strlen(flist->files[i]->dirname));
1474                         }
1475
1476                         if (flist->files[i]->dirname &&
1477                             !flist->files[i]->dirname[0]) {
1478                                 flist->files[i]->dirname = NULL;
1479                         }
1480                 }
1481         }
1482 }
1483
1484 static void output_flist(struct file_list *flist)
1485 {
1486         char uidbuf[16], gidbuf[16];
1487         struct file_struct *file;
1488         int i;
1489
1490         for (i = 0; i < flist->count; i++) {
1491                 file = flist->files[i];
1492                 if (am_root && preserve_uid)
1493                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1494                 else
1495                         *uidbuf = '\0';
1496                 if (preserve_gid && file->gid != GID_NONE)
1497                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1498                 else
1499                         *gidbuf = '\0';
1500                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1501                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1502                         NS(file->basename), (int) file->mode,
1503                         (double) file->length, uidbuf, gidbuf);
1504         }
1505 }
1506
1507
1508 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1509
1510 /* Compare the names of two file_struct entities, just like strcmp()
1511  * would do if it were operating on the joined strings.  We assume
1512  * that there are no 0-length strings.
1513  */
1514 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1515 {
1516         int dif;
1517         const uchar *c1, *c2;
1518         enum fnc_state state1, state2;
1519
1520         if (!f1 || !f1->basename) {
1521                 if (!f2 || !f2->basename)
1522                         return 0;
1523                 return -1;
1524         }
1525         if (!f2 || !f2->basename)
1526                 return 1;
1527
1528         if (!(c1 = (uchar*)f1->dirname)) {
1529                 state1 = fnc_BASE;
1530                 c1 = (uchar*)f1->basename;
1531         } else
1532                 state1 = fnc_DIR;
1533         if (!(c2 = (uchar*)f2->dirname)) {
1534                 state2 = fnc_BASE;
1535                 c2 = (uchar*)f2->basename;
1536         } else
1537                 state2 = fnc_DIR;
1538
1539         while (1) {
1540                 if ((dif = (int)*c1 - (int)*c2) != 0)
1541                         break;
1542                 if (!*++c1) {
1543                         switch (state1) {
1544                         case fnc_DIR:
1545                                 state1 = fnc_SLASH;
1546                                 c1 = (uchar*)"/";
1547                                 break;
1548                         case fnc_SLASH:
1549                                 state1 = fnc_BASE;
1550                                 c1 = (uchar*)f1->basename;
1551                                 break;
1552                         case fnc_BASE:
1553                                 break;
1554                         }
1555                 }
1556                 if (!*++c2) {
1557                         switch (state2) {
1558                         case fnc_DIR:
1559                                 state2 = fnc_SLASH;
1560                                 c2 = (uchar*)"/";
1561                                 break;
1562                         case fnc_SLASH:
1563                                 state2 = fnc_BASE;
1564                                 c2 = (uchar*)f2->basename;
1565                                 break;
1566                         case fnc_BASE:
1567                                 if (!*c1)
1568                                         return 0;
1569                                 break;
1570                         }
1571                 }
1572         }
1573
1574         return dif;
1575 }
1576
1577
1578 /* Return a copy of the full filename of a flist entry, using the indicated
1579  * buffer.  No size-checking is done because we checked the size when creating
1580  * the file_struct entry.
1581  */
1582 char *f_name_to(struct file_struct *f, char *fbuf)
1583 {
1584         if (!f || !f->basename)
1585                 return NULL;
1586
1587         if (f->dirname) {
1588                 int len = strlen(f->dirname);
1589                 memcpy(fbuf, f->dirname, len);
1590                 fbuf[len] = '/';
1591                 strcpy(fbuf + len + 1, f->basename);
1592         } else
1593                 strcpy(fbuf, f->basename);
1594         return fbuf;
1595 }
1596
1597
1598 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1599  */
1600 char *f_name(struct file_struct *f)
1601 {
1602         static char names[5][MAXPATHLEN];
1603         static unsigned int n;
1604
1605         n = (n + 1) % (sizeof names / sizeof names[0]);
1606
1607         return f_name_to(f, names[n]);
1608 }