No need to pass a debug string to check_exclude() anymore. When we
[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_list_struct exclude_list;
68 extern struct exclude_list_struct server_exclude_list;
69 extern struct exclude_list_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.head
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.head && check_exclude(&exclude_list, fname, is_dir))
235                 return 1;
236         if (local_exclude_list.head
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 uint64 dev;
328         static dev_t rdev;
329         static uint32 rdev_major;
330         static uid_t uid;
331         static gid_t gid;
332         static char lastname[MAXPATHLEN];
333         char *fname, fbuf[MAXPATHLEN];
334         int l1, l2;
335
336         if (f == -1)
337                 return;
338
339         if (!file) {
340                 write_byte(f, 0);
341                 modtime = 0, mode = 0;
342                 dev = 0, rdev = makedev(0, 0);
343                 rdev_major = 0;
344                 uid = 0, gid = 0;
345                 *lastname = '\0';
346                 return;
347         }
348
349         io_write_phase = "send_file_entry";
350
351         fname = f_name_to(file, fbuf);
352
353         flags = base_flags;
354
355         if (file->mode == mode)
356                 flags |= XMIT_SAME_MODE;
357         else
358                 mode = file->mode;
359         if (preserve_devices) {
360                 if (protocol_version < 28) {
361                         if (IS_DEVICE(mode)) {
362                                 if (file->u.rdev == rdev)
363                                         flags |= XMIT_SAME_RDEV_pre28;
364                                 else
365                                         rdev = file->u.rdev;
366                         } else
367                                 rdev = makedev(0, 0);
368                 } else if (IS_DEVICE(mode)) {
369                         rdev = file->u.rdev;
370                         if ((uint32)major(rdev) == rdev_major)
371                                 flags |= XMIT_SAME_RDEV_MAJOR;
372                         else
373                                 rdev_major = major(rdev);
374                         if ((uint32)minor(rdev) <= 0xFFu)
375                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
376                 }
377         }
378         if (file->uid == uid)
379                 flags |= XMIT_SAME_UID;
380         else
381                 uid = file->uid;
382         if (file->gid == gid)
383                 flags |= XMIT_SAME_GID;
384         else
385                 gid = file->gid;
386         if (file->modtime == modtime)
387                 flags |= XMIT_SAME_TIME;
388         else
389                 modtime = file->modtime;
390
391 #if SUPPORT_HARD_LINKS
392         if (file->link_u.idev) {
393                 if (file->F_DEV == dev) {
394                         if (protocol_version >= 28)
395                                 flags |= XMIT_SAME_DEV;
396                 } else
397                         dev = file->F_DEV;
398                 flags |= XMIT_HAS_IDEV_DATA;
399         }
400 #endif
401
402         for (l1 = 0;
403             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
404             l1++) {}
405         l2 = strlen(fname+l1);
406
407         if (l1 > 0)
408                 flags |= XMIT_SAME_NAME;
409         if (l2 > 255)
410                 flags |= XMIT_LONG_NAME;
411
412         /* We must make sure we don't send a zero flag byte or the
413          * other end will terminate the flist transfer.  Note that
414          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
415          * it's harmless way to add a bit to the first flag byte. */
416         if (protocol_version >= 28) {
417                 if (!flags && !S_ISDIR(mode))
418                         flags |= XMIT_TOP_DIR;
419                 if ((flags & 0xFF00) || !flags) {
420                         flags |= XMIT_EXTENDED_FLAGS;
421                         write_byte(f, flags);
422                         write_byte(f, flags >> 8);
423                 } else
424                         write_byte(f, flags);
425         } else {
426                 if (!(flags & 0xFF) && !S_ISDIR(mode))
427                         flags |= XMIT_TOP_DIR;
428                 if (!(flags & 0xFF))
429                         flags |= XMIT_LONG_NAME;
430                 write_byte(f, flags);
431         }
432         if (flags & XMIT_SAME_NAME)
433                 write_byte(f, l1);
434         if (flags & XMIT_LONG_NAME)
435                 write_int(f, l2);
436         else
437                 write_byte(f, l2);
438         write_buf(f, fname + l1, l2);
439
440         write_longint(f, file->length);
441         if (!(flags & XMIT_SAME_TIME))
442                 write_int(f, modtime);
443         if (!(flags & XMIT_SAME_MODE))
444                 write_int(f, to_wire_mode(mode));
445         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
446                 if (!numeric_ids)
447                         add_uid(uid);
448                 write_int(f, uid);
449         }
450         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
451                 if (!numeric_ids)
452                         add_gid(gid);
453                 write_int(f, gid);
454         }
455         if (preserve_devices && IS_DEVICE(mode)) {
456                 if (protocol_version < 28) {
457                         if (!(flags & XMIT_SAME_RDEV_pre28))
458                                 write_int(f, (int)rdev);
459                 } else {
460                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
461                                 write_int(f, major(rdev));
462                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
463                                 write_byte(f, minor(rdev));
464                         else
465                                 write_int(f, minor(rdev));
466                 }
467         }
468
469 #if SUPPORT_LINKS
470         if (preserve_links && S_ISLNK(mode)) {
471                 int len = strlen(file->u.link);
472                 write_int(f, len);
473                 write_buf(f, file->u.link, len);
474         }
475 #endif
476
477 #if SUPPORT_HARD_LINKS
478         if (flags & XMIT_HAS_IDEV_DATA) {
479                 if (protocol_version < 26) {
480                         /* 32-bit dev_t and ino_t */
481                         write_int(f, dev);
482                         write_int(f, file->F_INODE);
483                 } else {
484                         /* 64-bit dev_t and ino_t */
485                         if (!(flags & XMIT_SAME_DEV))
486                                 write_longint(f, dev);
487                         write_longint(f, file->F_INODE);
488                 }
489         }
490 #endif
491
492         if (always_checksum) {
493                 char *sum;
494                 if (S_ISREG(mode))
495                         sum = file->u.sum;
496                 else if (protocol_version < 28) {
497                         /* Prior to 28, we sent a useless set of nulls. */
498                         sum = empty_sum;
499                 } else
500                         sum = NULL;
501                 if (sum) {
502                         write_buf(f, sum,
503                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
504                 }
505         }
506
507         strlcpy(lastname, fname, MAXPATHLEN);
508
509         io_write_phase = "unknown";
510 }
511
512
513
514 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
515     struct file_list *flist, int f)
516 {
517         static time_t modtime;
518         static mode_t mode;
519         static uint64 dev;
520         static dev_t rdev;
521         static uint32 rdev_major;
522         static uid_t uid;
523         static gid_t gid;
524         static char lastname[MAXPATHLEN], *lastdir;
525         static int lastdir_len = -1;
526         char thisname[MAXPATHLEN];
527         unsigned int l1 = 0, l2 = 0;
528         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
529         OFF_T file_length;
530         char *basename, *dirname, *bp;
531         struct file_struct *file;
532
533         if (!fptr) {
534                 modtime = 0, mode = 0;
535                 dev = 0, rdev = makedev(0, 0);
536                 rdev_major = 0;
537                 uid = 0, gid = 0;
538                 *lastname = '\0';
539                 return;
540         }
541
542         if (flags & XMIT_SAME_NAME)
543                 l1 = read_byte(f);
544
545         if (flags & XMIT_LONG_NAME)
546                 l2 = read_int(f);
547         else
548                 l2 = read_byte(f);
549
550         if (l2 >= MAXPATHLEN - l1) {
551                 rprintf(FERROR,
552                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
553                         flags, l1, l2, lastname);
554                 overflow("receive_file_entry");
555         }
556
557         strlcpy(thisname, lastname, l1 + 1);
558         read_sbuf(f, &thisname[l1], l2);
559         thisname[l1 + l2] = 0;
560
561         strlcpy(lastname, thisname, MAXPATHLEN);
562
563         clean_fname(thisname);
564
565         if (sanitize_paths)
566                 sanitize_path(thisname, NULL);
567
568         if ((basename = strrchr(thisname, '/')) != NULL) {
569                 dirname_len = ++basename - thisname; /* counts future '\0' */
570                 if (lastdir_len == dirname_len - 1
571                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
572                         dirname = lastdir;
573                         dirname_len = 0; /* indicates no copy is needed */
574                 } else
575                         dirname = thisname;
576         } else {
577                 basename = thisname;
578                 dirname = NULL;
579                 dirname_len = 0;
580         }
581         basename_len = strlen(basename) + 1; /* count the '\0' */
582
583         file_length = read_longint(f);
584         if (!(flags & XMIT_SAME_TIME))
585                 modtime = (time_t)read_int(f);
586         if (!(flags & XMIT_SAME_MODE))
587                 mode = from_wire_mode(read_int(f));
588
589         if (preserve_uid && !(flags & XMIT_SAME_UID))
590                 uid = (uid_t)read_int(f);
591         if (preserve_gid && !(flags & XMIT_SAME_GID))
592                 gid = (gid_t)read_int(f);
593
594         if (preserve_devices) {
595                 if (protocol_version < 28) {
596                         if (IS_DEVICE(mode)) {
597                                 if (!(flags & XMIT_SAME_RDEV_pre28))
598                                         rdev = (dev_t)read_int(f);
599                         } else
600                                 rdev = makedev(0, 0);
601                 } else if (IS_DEVICE(mode)) {
602                         uint32 rdev_minor;
603                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
604                                 rdev_major = read_int(f);
605                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
606                                 rdev_minor = read_byte(f);
607                         else
608                                 rdev_minor = read_int(f);
609                         rdev = makedev(rdev_major, rdev_minor);
610                 }
611         }
612
613 #if SUPPORT_LINKS
614         if (preserve_links && S_ISLNK(mode)) {
615                 linkname_len = read_int(f) + 1; /* count the '\0' */
616                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
617                         rprintf(FERROR, "overflow: linkname_len=%d\n",
618                                 linkname_len - 1);
619                         overflow("receive_file_entry");
620                 }
621         }
622         else
623 #endif
624                 linkname_len = 0;
625
626         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
627
628         alloc_len = file_struct_len + dirname_len + basename_len
629                   + linkname_len + sum_len;
630         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
631
632         file = *fptr = (struct file_struct *)bp;
633         memset(bp, 0, file_struct_len);
634         bp += file_struct_len;
635
636         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
637         file->modtime = modtime;
638         file->length = file_length;
639         file->mode = mode;
640         file->uid = uid;
641         file->gid = gid;
642
643         if (dirname_len) {
644                 file->dirname = lastdir = bp;
645                 lastdir_len = dirname_len - 1;
646                 memcpy(bp, dirname, dirname_len - 1);
647                 bp += dirname_len;
648                 bp[-1] = '\0';
649         } else if (dirname)
650                 file->dirname = dirname;
651
652         file->basename = bp;
653         memcpy(bp, basename, basename_len);
654         bp += basename_len;
655
656         if (preserve_devices && IS_DEVICE(mode))
657                 file->u.rdev = rdev;
658
659 #if SUPPORT_LINKS
660         if (linkname_len) {
661                 file->u.link = bp;
662                 read_sbuf(f, bp, linkname_len - 1);
663                 if (sanitize_paths)
664                         sanitize_path(bp, lastdir);
665                 bp += linkname_len;
666         }
667 #endif
668
669 #if SUPPORT_HARD_LINKS
670         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
671                 flags |= XMIT_HAS_IDEV_DATA;
672         if (flags & XMIT_HAS_IDEV_DATA) {
673                 uint64 inode;
674                 if (protocol_version < 26) {
675                         dev = read_int(f);
676                         inode = read_int(f);
677                 } else {
678                         if (!(flags & XMIT_SAME_DEV))
679                                 dev = read_longint(f);
680                         inode = read_longint(f);
681                 }
682                 if (flist->hlink_pool) {
683                         file->link_u.idev = pool_talloc(flist->hlink_pool,
684                             struct idev, 1, "inode_table");
685                         file->F_INODE = inode;
686                         file->F_DEV = dev;
687                 }
688         }
689 #endif
690
691         if (always_checksum) {
692                 char *sum;
693                 if (sum_len) {
694                         file->u.sum = sum = bp;
695                         /*bp += sum_len;*/
696                 } else if (protocol_version < 28) {
697                         /* Prior to 28, we get a useless set of nulls. */
698                         sum = empty_sum;
699                 } else
700                         sum = NULL;
701                 if (sum) {
702                         read_buf(f, sum,
703                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
704                 }
705         }
706
707         if (!preserve_perms) {
708                 extern int orig_umask;
709                 /* set an appropriate set of permissions based on original
710                  * permissions and umask. This emulates what GNU cp does */
711                 file->mode &= ~orig_umask;
712         }
713 }
714
715
716 /**
717  * Create a file_struct for a named file by reading its stat()
718  * information and performing extensive checks against global
719  * options.
720  *
721  * @return the new file, or NULL if there was an error or this file
722  * should be excluded.
723  *
724  * @todo There is a small optimization opportunity here to avoid
725  * stat()ing the file in some circumstances, which has a certain cost.
726  * We are called immediately after doing readdir(), and so we may
727  * already know the d_type of the file.  We could for example avoid
728  * statting directories if we're not recursing, but this is not a very
729  * important case.  Some systems may not have d_type.
730  **/
731 struct file_struct *make_file(char *fname,
732     struct file_list *flist, int exclude_level)
733 {
734         static char *lastdir;
735         static int lastdir_len = -1;
736         struct file_struct *file;
737         STRUCT_STAT st;
738         char sum[SUM_LENGTH];
739         char thisname[MAXPATHLEN];
740         char linkname[MAXPATHLEN];
741         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
742         char *basename, *dirname, *bp;
743         unsigned short flags = 0;
744
745         if (!flist)     /* lastdir isn't valid if flist is NULL */
746                 lastdir_len = -1;
747
748         if (strlcpy(thisname, fname, sizeof thisname)
749             >= sizeof thisname - flist_dir_len) {
750                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
751                 return NULL;
752         }
753         clean_fname(thisname);
754         if (sanitize_paths)
755                 sanitize_path(thisname, NULL);
756
757         memset(sum, 0, SUM_LENGTH);
758
759         if (readlink_stat(thisname, &st, linkname) != 0) {
760                 int save_errno = errno;
761                 if (errno == ENOENT) {
762                         enum logcode c = am_daemon && protocol_version < 28
763                             ? FERROR : FINFO;
764                         /* either symlink pointing nowhere or file that
765                          * was removed during rsync run; see if excluded
766                          * before reporting an error */
767                         if (exclude_level != NO_EXCLUDES
768                             && check_exclude_file(thisname, 0, exclude_level)) {
769                                 /* file is excluded anyway, ignore silently */
770                                 return NULL;
771                         }
772                         io_error |= IOERR_VANISHED;
773                         rprintf(c, "file has vanished: %s\n",
774                             full_fname(thisname));
775                 }
776                 else {
777                         io_error |= IOERR_GENERAL;
778                         rprintf(FERROR, "readlink %s failed: %s\n",
779                             full_fname(thisname), strerror(save_errno));
780                 }
781                 return NULL;
782         }
783
784         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
785         if (exclude_level == NO_EXCLUDES)
786                 goto skip_excludes;
787
788         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
789                 rprintf(FINFO, "skipping directory %s\n", thisname);
790                 return NULL;
791         }
792
793         /* We only care about directories because we need to avoid recursing
794          * into a mount-point directory, not to avoid copying a symlinked
795          * file if -L (or similar) was specified. */
796         if (one_file_system && st.st_dev != filesystem_dev
797             && S_ISDIR(st.st_mode))
798                 flags |= FLAG_MOUNT_POINT;
799
800         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
801                 return NULL;
802
803         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
804                 return NULL;
805
806 skip_excludes:
807
808         if (verbose > 2) {
809                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
810                         who_am_i(), thisname, exclude_level);
811         }
812
813         if ((basename = strrchr(thisname, '/')) != NULL) {
814                 dirname_len = ++basename - thisname; /* counts future '\0' */
815                 if (lastdir_len == dirname_len - 1
816                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
817                         dirname = lastdir;
818                         dirname_len = 0; /* indicates no copy is needed */
819                 } else
820                         dirname = thisname;
821         } else {
822                 basename = thisname;
823                 dirname = NULL;
824                 dirname_len = 0;
825         }
826         basename_len = strlen(basename) + 1; /* count the '\0' */
827
828 #if SUPPORT_LINKS
829         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
830 #else
831         linkname_len = 0;
832 #endif
833
834         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
835
836         alloc_len = file_struct_len + dirname_len + basename_len
837             + linkname_len + sum_len;
838         if (flist) {
839                 bp = pool_alloc(flist->file_pool, alloc_len,
840                     "receive_file_entry");
841         } else {
842                 if (!(bp = new_array(char, alloc_len)))
843                         out_of_memory("receive_file_entry");
844         }
845
846         file = (struct file_struct *)bp;
847         memset(bp, 0, file_struct_len);
848         bp += file_struct_len;
849
850         file->flags = flags;
851         file->modtime = st.st_mtime;
852         file->length = st.st_size;
853         file->mode = st.st_mode;
854         file->uid = st.st_uid;
855         file->gid = st.st_gid;
856
857 #if SUPPORT_HARD_LINKS
858         if (flist && flist->hlink_pool) {
859                 if (protocol_version < 28) {
860                         if (S_ISREG(st.st_mode))
861                                 file->link_u.idev = pool_talloc(
862                                     flist->hlink_pool, struct idev, 1,
863                                     "inode_table");
864                 } else {
865                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
866                                 file->link_u.idev = pool_talloc(
867                                     flist->hlink_pool, struct idev, 1,
868                                     "inode_table");
869                 }
870         }
871         if (file->link_u.idev) {
872                 file->F_DEV = st.st_dev;
873                 file->F_INODE = st.st_ino;
874         }
875 #endif
876
877         if (dirname_len) {
878                 file->dirname = lastdir = bp;
879                 lastdir_len = dirname_len - 1;
880                 memcpy(bp, dirname, dirname_len - 1);
881                 bp += dirname_len;
882                 bp[-1] = '\0';
883         } else if (dirname)
884                 file->dirname = dirname;
885
886         file->basename = bp;
887         memcpy(bp, basename, basename_len);
888         bp += basename_len;
889
890 #ifdef HAVE_STRUCT_STAT_ST_RDEV
891         if (preserve_devices && IS_DEVICE(st.st_mode))
892                 file->u.rdev = st.st_rdev;
893 #endif
894
895 #if SUPPORT_LINKS
896         if (linkname_len) {
897                 file->u.link = bp;
898                 memcpy(bp, linkname, linkname_len);
899                 bp += linkname_len;
900         }
901 #endif
902
903         if (sum_len) {
904                 file->u.sum = bp;
905                 file_checksum(thisname, bp, st.st_size);
906                 /*bp += sum_len;*/
907         }
908
909         file->basedir = flist_dir;
910
911         if (!S_ISDIR(st.st_mode))
912                 stats.total_size += st.st_size;
913
914         return file;
915 }
916
917
918 void send_file_name(int f, struct file_list *flist, char *fname,
919                     int recursive, unsigned short base_flags)
920 {
921         struct file_struct *file;
922         char fbuf[MAXPATHLEN];
923         extern int delete_excluded;
924
925         /* f is set to -1 when calculating deletion file list */
926         file = make_file(fname, flist,
927             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
928
929         if (!file)
930                 return;
931
932         maybe_emit_filelist_progress(flist);
933
934         flist_expand(flist);
935
936         if (write_batch)
937                 file->flags |= FLAG_TOP_DIR;
938
939         if (file->basename[0]) {
940                 flist->files[flist->count++] = file;
941                 send_file_entry(file, f, base_flags);
942         }
943
944         if (recursive && S_ISDIR(file->mode)
945             && !(file->flags & FLAG_MOUNT_POINT)) {
946                 struct exclude_list_struct last_list = local_exclude_list;
947                 local_exclude_list.head = local_exclude_list.tail = NULL;
948                 send_directory(f, flist, f_name_to(file, fbuf));
949                 free_exclude_list(&local_exclude_list);
950                 local_exclude_list = last_list;
951         }
952 }
953
954
955 static void send_directory(int f, struct file_list *flist, char *dir)
956 {
957         DIR *d;
958         struct dirent *di;
959         char fname[MAXPATHLEN];
960         unsigned int offset;
961         char *p;
962
963         d = opendir(dir);
964         if (!d) {
965                 io_error |= IOERR_GENERAL;
966                 rprintf(FERROR, "opendir %s failed: %s\n",
967                         full_fname(dir), strerror(errno));
968                 return;
969         }
970
971         offset = strlcpy(fname, dir, MAXPATHLEN);
972         p = fname + offset;
973         if (offset >= MAXPATHLEN || p[-1] != '/') {
974                 if (offset >= MAXPATHLEN - 1) {
975                         io_error |= IOERR_GENERAL;
976                         rprintf(FERROR, "skipping long-named directory: %s\n",
977                                 full_fname(fname));
978                         closedir(d);
979                         return;
980                 }
981                 *p++ = '/';
982                 offset++;
983         }
984
985         if (cvs_exclude) {
986                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
987                     < MAXPATHLEN - offset) {
988                         add_exclude_file(&local_exclude_list, fname,
989                                          XFLG_WORD_SPLIT | XFLG_NO_PREFIXES);
990                 } else {
991                         io_error |= IOERR_GENERAL;
992                         rprintf(FINFO,
993                                 "cannot cvs-exclude in long-named directory %s\n",
994                                 full_fname(fname));
995                 }
996         }
997
998         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
999                 char *dname = d_name(di);
1000                 if (dname[0] == '.' && (dname[1] == '\0'
1001                     || (dname[1] == '.' && dname[2] == '\0')))
1002                         continue;
1003                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1004                         send_file_name(f, flist, fname, recurse, 0);
1005                 else {
1006                         io_error |= IOERR_GENERAL;
1007                         rprintf(FINFO,
1008                                 "cannot send long-named file %s\n",
1009                                 full_fname(fname));
1010                 }
1011         }
1012         if (errno) {
1013                 io_error |= IOERR_GENERAL;
1014                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1015                         dir, errno, strerror(errno));
1016         }
1017
1018         closedir(d);
1019 }
1020
1021
1022 /**
1023  * The delete_files() function in receiver.c sets f to -1 so that we just
1024  * construct the file list in memory without sending it over the wire.  It
1025  * also has the side-effect of ignoring user-excludes if delete_excluded
1026  * is set (so that the delete list includes user-excluded files).
1027  **/
1028 struct file_list *send_file_list(int f, int argc, char *argv[])
1029 {
1030         int l;
1031         STRUCT_STAT st;
1032         char *p, *dir, olddir[sizeof curr_dir];
1033         char lastpath[MAXPATHLEN] = "";
1034         struct file_list *flist;
1035         int64 start_write;
1036         int use_ff_fd = 0;
1037
1038         if (show_filelist_p() && f != -1)
1039                 start_filelist_progress("building file list");
1040
1041         start_write = stats.total_written;
1042
1043         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1044             "send_file_list");
1045
1046         if (f != -1) {
1047                 io_start_buffering_out(f);
1048                 if (filesfrom_fd >= 0) {
1049                         if (argv[0] && !push_dir(argv[0])) {
1050                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1051                                         full_fname(argv[0]), strerror(errno));
1052                                 exit_cleanup(RERR_FILESELECT);
1053                         }
1054                         use_ff_fd = 1;
1055                 }
1056         }
1057
1058         while (1) {
1059                 char fname2[MAXPATHLEN];
1060                 char *fname = fname2;
1061
1062                 if (use_ff_fd) {
1063                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1064                                 break;
1065                         sanitize_path(fname, NULL);
1066                 } else {
1067                         if (argc-- == 0)
1068                                 break;
1069                         strlcpy(fname, *argv++, MAXPATHLEN);
1070                         if (sanitize_paths)
1071                                 sanitize_path(fname, NULL);
1072                 }
1073
1074                 l = strlen(fname);
1075                 if (fname[l - 1] == '/') {
1076                         if (l == 2 && fname[0] == '.') {
1077                                 /* Turn "./" into just "." rather than "./." */
1078                                 fname[1] = '\0';
1079                         } else if (l < MAXPATHLEN) {
1080                                 fname[l++] = '.';
1081                                 fname[l] = '\0';
1082                         }
1083                 }
1084
1085                 if (link_stat(fname, &st) != 0) {
1086                         if (f != -1) {
1087                                 io_error |= IOERR_GENERAL;
1088                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1089                                         full_fname(fname), strerror(errno));
1090                         }
1091                         continue;
1092                 }
1093
1094                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1095                         rprintf(FINFO, "skipping directory %s\n", fname);
1096                         continue;
1097                 }
1098
1099                 dir = NULL;
1100                 olddir[0] = '\0';
1101
1102                 if (!relative_paths) {
1103                         p = strrchr(fname, '/');
1104                         if (p) {
1105                                 *p = 0;
1106                                 if (p == fname)
1107                                         dir = "/";
1108                                 else
1109                                         dir = fname;
1110                                 fname = p + 1;
1111                         }
1112                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1113                         /* this ensures we send the intermediate directories,
1114                            thus getting their permissions right */
1115                         char *lp = lastpath, *fn = fname, *slash = fname;
1116                         *p = 0;
1117                         /* Skip any initial directories in our path that we
1118                          * have in common with lastpath. */
1119                         while (*fn && *lp == *fn) {
1120                                 if (*fn == '/')
1121                                         slash = fn;
1122                                 lp++, fn++;
1123                         }
1124                         *p = '/';
1125                         if (fn != p || (*lp && *lp != '/')) {
1126                                 int copy_links_saved = copy_links;
1127                                 int recurse_saved = recurse;
1128                                 copy_links = copy_unsafe_links;
1129                                 /* set recurse to 1 to prevent make_file
1130                                  * from ignoring directory, but still
1131                                  * turn off the recursive parameter to
1132                                  * send_file_name */
1133                                 recurse = 1;
1134                                 while ((slash = strchr(slash+1, '/')) != 0) {
1135                                         *slash = 0;
1136                                         send_file_name(f, flist, fname, 0, 0);
1137                                         *slash = '/';
1138                                 }
1139                                 copy_links = copy_links_saved;
1140                                 recurse = recurse_saved;
1141                                 *p = 0;
1142                                 strlcpy(lastpath, fname, sizeof lastpath);
1143                                 *p = '/';
1144                         }
1145                 }
1146
1147                 if (!*fname)
1148                         fname = ".";
1149
1150                 if (dir && *dir) {
1151                         static char *lastdir;
1152                         static int lastdir_len;
1153
1154                         strcpy(olddir, curr_dir); /* can't overflow */
1155
1156                         if (!push_dir(dir)) {
1157                                 io_error |= IOERR_GENERAL;
1158                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1159                                         full_fname(dir), strerror(errno));
1160                                 continue;
1161                         }
1162
1163                         if (lastdir && strcmp(lastdir, dir) == 0) {
1164                                 flist_dir = lastdir;
1165                                 flist_dir_len = lastdir_len;
1166                         } else {
1167                                 flist_dir = lastdir = strdup(dir);
1168                                 flist_dir_len = lastdir_len = strlen(dir);
1169                         }
1170                 }
1171
1172                 if (one_file_system)
1173                         set_filesystem(fname);
1174
1175                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1176
1177                 if (olddir[0]) {
1178                         flist_dir = NULL;
1179                         flist_dir_len = 0;
1180                         if (!pop_dir(olddir)) {
1181                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1182                                         full_fname(dir), strerror(errno));
1183                                 exit_cleanup(RERR_FILESELECT);
1184                         }
1185                 }
1186         }
1187
1188         if (f != -1) {
1189                 send_file_entry(NULL, f, 0);
1190
1191                 if (show_filelist_p())
1192                         finish_filelist_progress(flist);
1193         }
1194
1195         if (flist->hlink_pool) {
1196                 pool_destroy(flist->hlink_pool);
1197                 flist->hlink_pool = NULL;
1198         }
1199
1200         clean_flist(flist, 0, 0);
1201
1202         if (f != -1) {
1203                 /* Now send the uid/gid list. This was introduced in
1204                  * protocol version 15 */
1205                 send_uid_list(f);
1206
1207                 /* send the io_error flag */
1208                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1209
1210                 io_end_buffering();
1211                 stats.flist_size = stats.total_written - start_write;
1212                 stats.num_files = flist->count;
1213                 if (write_batch)
1214                         write_batch_flist_info(flist->count, flist->files);
1215         }
1216
1217         if (verbose > 3)
1218                 output_flist(flist);
1219
1220         if (verbose > 2)
1221                 rprintf(FINFO, "send_file_list done\n");
1222
1223         return flist;
1224 }
1225
1226
1227 struct file_list *recv_file_list(int f)
1228 {
1229         struct file_list *flist;
1230         unsigned short flags;
1231         int64 start_read;
1232         extern int list_only;
1233
1234         if (show_filelist_p())
1235                 start_filelist_progress("receiving file list");
1236
1237         start_read = stats.total_read;
1238
1239         flist = flist_new(WITH_HLINK, "recv_file_list");
1240
1241         flist->count = 0;
1242         flist->malloced = 1000;
1243         flist->files = new_array(struct file_struct *, flist->malloced);
1244         if (!flist->files)
1245                 goto oom;
1246
1247
1248         while ((flags = read_byte(f)) != 0) {
1249                 int i = flist->count;
1250
1251                 flist_expand(flist);
1252
1253                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1254                         flags |= read_byte(f) << 8;
1255                 receive_file_entry(&flist->files[i], flags, flist, f);
1256
1257                 if (S_ISREG(flist->files[i]->mode))
1258                         stats.total_size += flist->files[i]->length;
1259
1260                 flist->count++;
1261
1262                 maybe_emit_filelist_progress(flist);
1263
1264                 if (verbose > 2) {
1265                         rprintf(FINFO, "recv_file_name(%s)\n",
1266                                 f_name(flist->files[i]));
1267                 }
1268         }
1269         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1270
1271         if (verbose > 2)
1272                 rprintf(FINFO, "received %d names\n", flist->count);
1273
1274         if (show_filelist_p())
1275                 finish_filelist_progress(flist);
1276
1277         clean_flist(flist, relative_paths, 1);
1278
1279         if (f != -1) {
1280                 /* Now send the uid/gid list. This was introduced in
1281                  * protocol version 15 */
1282                 recv_uid_list(f, flist);
1283
1284                 if (!read_batch) {
1285                         /* Recv the io_error flag */
1286                         if (lp_ignore_errors(module_id) || ignore_errors)
1287                                 read_int(f);
1288                         else
1289                                 io_error |= read_int(f);
1290                 }
1291         }
1292
1293         if (verbose > 3)
1294                 output_flist(flist);
1295
1296         if (list_only) {
1297                 int i;
1298                 for (i = 0; i < flist->count; i++)
1299                         list_file_entry(flist->files[i]);
1300         }
1301
1302         if (verbose > 2)
1303                 rprintf(FINFO, "recv_file_list done\n");
1304
1305         stats.flist_size = stats.total_read - start_read;
1306         stats.num_files = flist->count;
1307
1308         return flist;
1309
1310 oom:
1311         out_of_memory("recv_file_list");
1312         return NULL;            /* not reached */
1313 }
1314
1315
1316 int file_compare(struct file_struct **file1, struct file_struct **file2)
1317 {
1318         struct file_struct *f1 = *file1;
1319         struct file_struct *f2 = *file2;
1320
1321         if (!f1->basename && !f2->basename)
1322                 return 0;
1323         if (!f1->basename)
1324                 return -1;
1325         if (!f2->basename)
1326                 return 1;
1327         if (f1->dirname == f2->dirname)
1328                 return u_strcmp(f1->basename, f2->basename);
1329         return f_name_cmp(f1, f2);
1330 }
1331
1332
1333 int flist_find(struct file_list *flist, struct file_struct *f)
1334 {
1335         int low = 0, high = flist->count - 1;
1336
1337         while (high >= 0 && !flist->files[high]->basename) high--;
1338
1339         if (high < 0)
1340                 return -1;
1341
1342         while (low != high) {
1343                 int mid = (low + high) / 2;
1344                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1345                 if (ret == 0)
1346                         return flist_up(flist, mid);
1347                 if (ret > 0)
1348                         high = mid;
1349                 else
1350                         low = mid + 1;
1351         }
1352
1353         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1354                 return flist_up(flist, low);
1355         return -1;
1356 }
1357
1358 /*
1359  * Free up any resources a file_struct has allocated
1360  * and clear the file.
1361  */
1362 void clear_file(int i, struct file_list *flist)
1363 {
1364         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1365                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1366         memset(flist->files[i], 0, file_struct_len);
1367 }
1368
1369
1370 /*
1371  * allocate a new file list
1372  */
1373 struct file_list *flist_new(int with_hlink, char *msg)
1374 {
1375         struct file_list *flist;
1376
1377         flist = new(struct file_list);
1378         if (!flist)
1379                 out_of_memory(msg);
1380
1381         memset(flist, 0, sizeof (struct file_list));
1382
1383         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1384             out_of_memory, POOL_INTERN)))
1385                 out_of_memory(msg);
1386
1387 #if SUPPORT_HARD_LINKS
1388         if (with_hlink && preserve_hard_links) {
1389                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1390                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1391                         out_of_memory(msg);
1392         }
1393 #endif
1394
1395         return flist;
1396 }
1397
1398 /*
1399  * free up all elements in a flist
1400  */
1401 void flist_free(struct file_list *flist)
1402 {
1403         pool_destroy(flist->file_pool);
1404         pool_destroy(flist->hlink_pool);
1405         free(flist->files);
1406         free(flist);
1407 }
1408
1409
1410 /*
1411  * This routine ensures we don't have any duplicate names in our file list.
1412  * duplicate names can cause corruption because of the pipelining
1413  */
1414 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1415 {
1416         int i, prev_i = 0;
1417
1418         if (!flist || flist->count == 0)
1419                 return;
1420
1421         qsort(flist->files, flist->count,
1422             sizeof flist->files[0], (int (*)()) file_compare);
1423
1424         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1425                 if (flist->files[i]->basename) {
1426                         prev_i = i;
1427                         break;
1428                 }
1429         }
1430         while (++i < flist->count) {
1431                 if (!flist->files[i]->basename)
1432                         continue;
1433                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1434                         if (verbose > 1 && !am_server) {
1435                                 rprintf(FINFO,
1436                                         "removing duplicate name %s from file list %d\n",
1437                                         f_name(flist->files[i]), i);
1438                         }
1439                         /* Make sure that if we unduplicate '.', that we don't
1440                          * lose track of a user-specified starting point (or
1441                          * else deletions will mysteriously fail with -R). */
1442                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1443                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1444
1445                         clear_file(i, flist);
1446                 } else
1447                         prev_i = i;
1448         }
1449
1450         if (strip_root) {
1451                 /* we need to strip off the root directory in the case
1452                    of relative paths, but this must be done _after_
1453                    the sorting phase */
1454                 for (i = 0; i < flist->count; i++) {
1455                         if (flist->files[i]->dirname &&
1456                             flist->files[i]->dirname[0] == '/') {
1457                                 memmove(&flist->files[i]->dirname[0],
1458                                         &flist->files[i]->dirname[1],
1459                                         strlen(flist->files[i]->dirname));
1460                         }
1461
1462                         if (flist->files[i]->dirname &&
1463                             !flist->files[i]->dirname[0]) {
1464                                 flist->files[i]->dirname = NULL;
1465                         }
1466                 }
1467         }
1468 }
1469
1470 static void output_flist(struct file_list *flist)
1471 {
1472         char uidbuf[16], gidbuf[16];
1473         struct file_struct *file;
1474         int i;
1475
1476         for (i = 0; i < flist->count; i++) {
1477                 file = flist->files[i];
1478                 if (am_root && preserve_uid)
1479                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1480                 else
1481                         *uidbuf = '\0';
1482                 if (preserve_gid && file->gid != GID_NONE)
1483                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1484                 else
1485                         *gidbuf = '\0';
1486                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1487                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1488                         NS(file->basename), (int) file->mode,
1489                         (double) file->length, uidbuf, gidbuf);
1490         }
1491 }
1492
1493
1494 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1495
1496 /* Compare the names of two file_struct entities, just like strcmp()
1497  * would do if it were operating on the joined strings.  We assume
1498  * that there are no 0-length strings.
1499  */
1500 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1501 {
1502         int dif;
1503         const uchar *c1, *c2;
1504         enum fnc_state state1, state2;
1505
1506         if (!f1 || !f1->basename) {
1507                 if (!f2 || !f2->basename)
1508                         return 0;
1509                 return -1;
1510         }
1511         if (!f2 || !f2->basename)
1512                 return 1;
1513
1514         if (!(c1 = (uchar*)f1->dirname)) {
1515                 state1 = fnc_BASE;
1516                 c1 = (uchar*)f1->basename;
1517         } else
1518                 state1 = fnc_DIR;
1519         if (!(c2 = (uchar*)f2->dirname)) {
1520                 state2 = fnc_BASE;
1521                 c2 = (uchar*)f2->basename;
1522         } else
1523                 state2 = fnc_DIR;
1524
1525         while (1) {
1526                 if ((dif = (int)*c1 - (int)*c2) != 0)
1527                         break;
1528                 if (!*++c1) {
1529                         switch (state1) {
1530                         case fnc_DIR:
1531                                 state1 = fnc_SLASH;
1532                                 c1 = (uchar*)"/";
1533                                 break;
1534                         case fnc_SLASH:
1535                                 state1 = fnc_BASE;
1536                                 c1 = (uchar*)f1->basename;
1537                                 break;
1538                         case fnc_BASE:
1539                                 break;
1540                         }
1541                 }
1542                 if (!*++c2) {
1543                         switch (state2) {
1544                         case fnc_DIR:
1545                                 state2 = fnc_SLASH;
1546                                 c2 = (uchar*)"/";
1547                                 break;
1548                         case fnc_SLASH:
1549                                 state2 = fnc_BASE;
1550                                 c2 = (uchar*)f2->basename;
1551                                 break;
1552                         case fnc_BASE:
1553                                 if (!*c1)
1554                                         return 0;
1555                                 break;
1556                         }
1557                 }
1558         }
1559
1560         return dif;
1561 }
1562
1563
1564 /* Return a copy of the full filename of a flist entry, using the indicated
1565  * buffer.  No size-checking is done because we checked the size when creating
1566  * the file_struct entry.
1567  */
1568 char *f_name_to(struct file_struct *f, char *fbuf)
1569 {
1570         if (!f || !f->basename)
1571                 return NULL;
1572
1573         if (f->dirname) {
1574                 int len = strlen(f->dirname);
1575                 memcpy(fbuf, f->dirname, len);
1576                 fbuf[len] = '/';
1577                 strcpy(fbuf + len + 1, f->basename);
1578         } else
1579                 strcpy(fbuf, f->basename);
1580         return fbuf;
1581 }
1582
1583
1584 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1585  */
1586 char *f_name(struct file_struct *f)
1587 {
1588         static char names[5][MAXPATHLEN];
1589         static unsigned int n;
1590
1591         n = (n + 1) % (sizeof names / sizeof names[0]);
1592
1593         return f_name_to(f, names[n]);
1594 }