Restore the old include behavior where a command-line include could
[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         int rc;
215
216 #if 0 /* This currently never happens, so avoid a useless compare. */
217         if (exclude_level == NO_EXCLUDES)
218                 return 0;
219 #endif
220         if (fname) {
221                 /* never exclude '.', even if somebody does --exclude '*' */
222                 if (fname[0] == '.' && !fname[1])
223                         return 0;
224                 /* Handle the -R version of the '.' dir. */
225                 if (fname[0] == '/') {
226                         int len = strlen(fname);
227                         if (fname[len-1] == '.' && fname[len-2] == '/')
228                                 return 0;
229                 }
230         }
231         if (server_exclude_list.head
232             && check_exclude(&server_exclude_list, fname, is_dir) < 0)
233                 return 1;
234         if (exclude_level != ALL_EXCLUDES)
235                 return 0;
236         if (exclude_list.head
237             && (rc = check_exclude(&exclude_list, fname, is_dir)) != 0)
238                 return rc < 0;
239         if (local_exclude_list.head
240             && check_exclude(&local_exclude_list, fname, is_dir) < 0)
241                 return 1;
242         return 0;
243 }
244
245 /* used by the one_file_system code */
246 static dev_t filesystem_dev;
247
248 static void set_filesystem(char *fname)
249 {
250         STRUCT_STAT st;
251         if (link_stat(fname, &st) != 0)
252                 return;
253         filesystem_dev = st.st_dev;
254 }
255
256
257 static int to_wire_mode(mode_t mode)
258 {
259 #if SUPPORT_LINKS
260         if (S_ISLNK(mode) && (_S_IFLNK != 0120000))
261                 return (mode & ~(_S_IFMT)) | 0120000;
262 #endif
263         return (int) mode;
264 }
265
266 static mode_t from_wire_mode(int mode)
267 {
268         if ((mode & (_S_IFMT)) == 0120000 && (_S_IFLNK != 0120000))
269                 return (mode & ~(_S_IFMT)) | _S_IFLNK;
270         return (mode_t) mode;
271 }
272
273
274 static void send_directory(int f, struct file_list *flist, char *dir);
275
276 static char *flist_dir;
277 static int flist_dir_len;
278
279
280 /**
281  * Make sure @p flist is big enough to hold at least @p flist->count
282  * entries.
283  **/
284 void flist_expand(struct file_list *flist)
285 {
286         void *new_ptr;
287
288         if (flist->count < flist->malloced)
289                 return;
290
291         if (flist->malloced < FLIST_START)
292                 flist->malloced = FLIST_START;
293         else if (flist->malloced >= FLIST_LINEAR)
294                 flist->malloced += FLIST_LINEAR;
295         else
296                 flist->malloced *= 2;
297
298         /*
299          * In case count jumped or we are starting the list
300          * with a known size just set it.
301          */
302         if (flist->malloced < flist->count)
303                 flist->malloced = flist->count;
304
305         if (flist->files) {
306                 new_ptr = realloc_array(flist->files,
307                     struct file_struct *, flist->malloced);
308         } else {
309                 new_ptr = new_array(struct file_struct *, flist->malloced);
310         }
311
312         if (verbose >= 2) {
313                 rprintf(FINFO, "[%s] expand file_list to %.0f bytes, did%s move\n",
314                     who_am_i(),
315                     (double) sizeof flist->files[0] * flist->malloced,
316                     (new_ptr == flist->files) ? " not" : "");
317         }
318
319         flist->files = (struct file_struct **) new_ptr;
320
321         if (!flist->files)
322                 out_of_memory("flist_expand");
323 }
324
325 void send_file_entry(struct file_struct *file, int f, unsigned short base_flags)
326 {
327         unsigned short flags;
328         static time_t modtime;
329         static mode_t mode;
330         static uint64 dev;
331         static dev_t rdev;
332         static uint32 rdev_major;
333         static uid_t uid;
334         static gid_t gid;
335         static char lastname[MAXPATHLEN];
336         char *fname, fbuf[MAXPATHLEN];
337         int l1, l2;
338
339         if (f == -1)
340                 return;
341
342         if (!file) {
343                 write_byte(f, 0);
344                 modtime = 0, mode = 0;
345                 dev = 0, rdev = makedev(0, 0);
346                 rdev_major = 0;
347                 uid = 0, gid = 0;
348                 *lastname = '\0';
349                 return;
350         }
351
352         io_write_phase = "send_file_entry";
353
354         fname = f_name_to(file, fbuf);
355
356         flags = base_flags;
357
358         if (file->mode == mode)
359                 flags |= XMIT_SAME_MODE;
360         else
361                 mode = file->mode;
362         if (preserve_devices) {
363                 if (protocol_version < 28) {
364                         if (IS_DEVICE(mode)) {
365                                 if (file->u.rdev == rdev)
366                                         flags |= XMIT_SAME_RDEV_pre28;
367                                 else
368                                         rdev = file->u.rdev;
369                         } else
370                                 rdev = makedev(0, 0);
371                 } else if (IS_DEVICE(mode)) {
372                         rdev = file->u.rdev;
373                         if ((uint32)major(rdev) == rdev_major)
374                                 flags |= XMIT_SAME_RDEV_MAJOR;
375                         else
376                                 rdev_major = major(rdev);
377                         if ((uint32)minor(rdev) <= 0xFFu)
378                                 flags |= XMIT_RDEV_MINOR_IS_SMALL;
379                 }
380         }
381         if (file->uid == uid)
382                 flags |= XMIT_SAME_UID;
383         else
384                 uid = file->uid;
385         if (file->gid == gid)
386                 flags |= XMIT_SAME_GID;
387         else
388                 gid = file->gid;
389         if (file->modtime == modtime)
390                 flags |= XMIT_SAME_TIME;
391         else
392                 modtime = file->modtime;
393
394 #if SUPPORT_HARD_LINKS
395         if (file->link_u.idev) {
396                 if (file->F_DEV == dev) {
397                         if (protocol_version >= 28)
398                                 flags |= XMIT_SAME_DEV;
399                 } else
400                         dev = file->F_DEV;
401                 flags |= XMIT_HAS_IDEV_DATA;
402         }
403 #endif
404
405         for (l1 = 0;
406             lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);
407             l1++) {}
408         l2 = strlen(fname+l1);
409
410         if (l1 > 0)
411                 flags |= XMIT_SAME_NAME;
412         if (l2 > 255)
413                 flags |= XMIT_LONG_NAME;
414
415         /* We must make sure we don't send a zero flag byte or the
416          * other end will terminate the flist transfer.  Note that
417          * the use of XMIT_TOP_DIR on a non-dir has no meaning, so
418          * it's harmless way to add a bit to the first flag byte. */
419         if (protocol_version >= 28) {
420                 if (!flags && !S_ISDIR(mode))
421                         flags |= XMIT_TOP_DIR;
422                 if ((flags & 0xFF00) || !flags) {
423                         flags |= XMIT_EXTENDED_FLAGS;
424                         write_byte(f, flags);
425                         write_byte(f, flags >> 8);
426                 } else
427                         write_byte(f, flags);
428         } else {
429                 if (!(flags & 0xFF) && !S_ISDIR(mode))
430                         flags |= XMIT_TOP_DIR;
431                 if (!(flags & 0xFF))
432                         flags |= XMIT_LONG_NAME;
433                 write_byte(f, flags);
434         }
435         if (flags & XMIT_SAME_NAME)
436                 write_byte(f, l1);
437         if (flags & XMIT_LONG_NAME)
438                 write_int(f, l2);
439         else
440                 write_byte(f, l2);
441         write_buf(f, fname + l1, l2);
442
443         write_longint(f, file->length);
444         if (!(flags & XMIT_SAME_TIME))
445                 write_int(f, modtime);
446         if (!(flags & XMIT_SAME_MODE))
447                 write_int(f, to_wire_mode(mode));
448         if (preserve_uid && !(flags & XMIT_SAME_UID)) {
449                 if (!numeric_ids)
450                         add_uid(uid);
451                 write_int(f, uid);
452         }
453         if (preserve_gid && !(flags & XMIT_SAME_GID)) {
454                 if (!numeric_ids)
455                         add_gid(gid);
456                 write_int(f, gid);
457         }
458         if (preserve_devices && IS_DEVICE(mode)) {
459                 if (protocol_version < 28) {
460                         if (!(flags & XMIT_SAME_RDEV_pre28))
461                                 write_int(f, (int)rdev);
462                 } else {
463                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
464                                 write_int(f, major(rdev));
465                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
466                                 write_byte(f, minor(rdev));
467                         else
468                                 write_int(f, minor(rdev));
469                 }
470         }
471
472 #if SUPPORT_LINKS
473         if (preserve_links && S_ISLNK(mode)) {
474                 int len = strlen(file->u.link);
475                 write_int(f, len);
476                 write_buf(f, file->u.link, len);
477         }
478 #endif
479
480 #if SUPPORT_HARD_LINKS
481         if (flags & XMIT_HAS_IDEV_DATA) {
482                 if (protocol_version < 26) {
483                         /* 32-bit dev_t and ino_t */
484                         write_int(f, dev);
485                         write_int(f, file->F_INODE);
486                 } else {
487                         /* 64-bit dev_t and ino_t */
488                         if (!(flags & XMIT_SAME_DEV))
489                                 write_longint(f, dev);
490                         write_longint(f, file->F_INODE);
491                 }
492         }
493 #endif
494
495         if (always_checksum) {
496                 char *sum;
497                 if (S_ISREG(mode))
498                         sum = file->u.sum;
499                 else if (protocol_version < 28) {
500                         /* Prior to 28, we sent a useless set of nulls. */
501                         sum = empty_sum;
502                 } else
503                         sum = NULL;
504                 if (sum) {
505                         write_buf(f, sum,
506                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
507                 }
508         }
509
510         strlcpy(lastname, fname, MAXPATHLEN);
511
512         io_write_phase = "unknown";
513 }
514
515
516
517 void receive_file_entry(struct file_struct **fptr, unsigned short flags,
518     struct file_list *flist, int f)
519 {
520         static time_t modtime;
521         static mode_t mode;
522         static uint64 dev;
523         static dev_t rdev;
524         static uint32 rdev_major;
525         static uid_t uid;
526         static gid_t gid;
527         static char lastname[MAXPATHLEN], *lastdir;
528         static int lastdir_len = -1;
529         char thisname[MAXPATHLEN];
530         unsigned int l1 = 0, l2 = 0;
531         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
532         OFF_T file_length;
533         char *basename, *dirname, *bp;
534         struct file_struct *file;
535
536         if (!fptr) {
537                 modtime = 0, mode = 0;
538                 dev = 0, rdev = makedev(0, 0);
539                 rdev_major = 0;
540                 uid = 0, gid = 0;
541                 *lastname = '\0';
542                 return;
543         }
544
545         if (flags & XMIT_SAME_NAME)
546                 l1 = read_byte(f);
547
548         if (flags & XMIT_LONG_NAME)
549                 l2 = read_int(f);
550         else
551                 l2 = read_byte(f);
552
553         if (l2 >= MAXPATHLEN - l1) {
554                 rprintf(FERROR,
555                         "overflow: flags=0x%x l1=%d l2=%d lastname=%s\n",
556                         flags, l1, l2, lastname);
557                 overflow("receive_file_entry");
558         }
559
560         strlcpy(thisname, lastname, l1 + 1);
561         read_sbuf(f, &thisname[l1], l2);
562         thisname[l1 + l2] = 0;
563
564         strlcpy(lastname, thisname, MAXPATHLEN);
565
566         clean_fname(thisname);
567
568         if (sanitize_paths)
569                 sanitize_path(thisname, NULL);
570
571         if ((basename = strrchr(thisname, '/')) != NULL) {
572                 dirname_len = ++basename - thisname; /* counts future '\0' */
573                 if (lastdir_len == dirname_len - 1
574                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
575                         dirname = lastdir;
576                         dirname_len = 0; /* indicates no copy is needed */
577                 } else
578                         dirname = thisname;
579         } else {
580                 basename = thisname;
581                 dirname = NULL;
582                 dirname_len = 0;
583         }
584         basename_len = strlen(basename) + 1; /* count the '\0' */
585
586         file_length = read_longint(f);
587         if (!(flags & XMIT_SAME_TIME))
588                 modtime = (time_t)read_int(f);
589         if (!(flags & XMIT_SAME_MODE))
590                 mode = from_wire_mode(read_int(f));
591
592         if (preserve_uid && !(flags & XMIT_SAME_UID))
593                 uid = (uid_t)read_int(f);
594         if (preserve_gid && !(flags & XMIT_SAME_GID))
595                 gid = (gid_t)read_int(f);
596
597         if (preserve_devices) {
598                 if (protocol_version < 28) {
599                         if (IS_DEVICE(mode)) {
600                                 if (!(flags & XMIT_SAME_RDEV_pre28))
601                                         rdev = (dev_t)read_int(f);
602                         } else
603                                 rdev = makedev(0, 0);
604                 } else if (IS_DEVICE(mode)) {
605                         uint32 rdev_minor;
606                         if (!(flags & XMIT_SAME_RDEV_MAJOR))
607                                 rdev_major = read_int(f);
608                         if (flags & XMIT_RDEV_MINOR_IS_SMALL)
609                                 rdev_minor = read_byte(f);
610                         else
611                                 rdev_minor = read_int(f);
612                         rdev = makedev(rdev_major, rdev_minor);
613                 }
614         }
615
616 #if SUPPORT_LINKS
617         if (preserve_links && S_ISLNK(mode)) {
618                 linkname_len = read_int(f) + 1; /* count the '\0' */
619                 if (linkname_len <= 0 || linkname_len > MAXPATHLEN) {
620                         rprintf(FERROR, "overflow: linkname_len=%d\n",
621                                 linkname_len - 1);
622                         overflow("receive_file_entry");
623                 }
624         }
625         else
626 #endif
627                 linkname_len = 0;
628
629         sum_len = always_checksum && S_ISREG(mode) ? MD4_SUM_LENGTH : 0;
630
631         alloc_len = file_struct_len + dirname_len + basename_len
632                   + linkname_len + sum_len;
633         bp = pool_alloc(flist->file_pool, alloc_len, "receive_file_entry");
634
635         file = *fptr = (struct file_struct *)bp;
636         memset(bp, 0, file_struct_len);
637         bp += file_struct_len;
638
639         file->flags = flags & XMIT_TOP_DIR ? FLAG_TOP_DIR : 0;
640         file->modtime = modtime;
641         file->length = file_length;
642         file->mode = mode;
643         file->uid = uid;
644         file->gid = gid;
645
646         if (dirname_len) {
647                 file->dirname = lastdir = bp;
648                 lastdir_len = dirname_len - 1;
649                 memcpy(bp, dirname, dirname_len - 1);
650                 bp += dirname_len;
651                 bp[-1] = '\0';
652         } else if (dirname)
653                 file->dirname = dirname;
654
655         file->basename = bp;
656         memcpy(bp, basename, basename_len);
657         bp += basename_len;
658
659         if (preserve_devices && IS_DEVICE(mode))
660                 file->u.rdev = rdev;
661
662 #if SUPPORT_LINKS
663         if (linkname_len) {
664                 file->u.link = bp;
665                 read_sbuf(f, bp, linkname_len - 1);
666                 if (sanitize_paths)
667                         sanitize_path(bp, lastdir);
668                 bp += linkname_len;
669         }
670 #endif
671
672 #if SUPPORT_HARD_LINKS
673         if (preserve_hard_links && protocol_version < 28 && S_ISREG(mode))
674                 flags |= XMIT_HAS_IDEV_DATA;
675         if (flags & XMIT_HAS_IDEV_DATA) {
676                 uint64 inode;
677                 if (protocol_version < 26) {
678                         dev = read_int(f);
679                         inode = read_int(f);
680                 } else {
681                         if (!(flags & XMIT_SAME_DEV))
682                                 dev = read_longint(f);
683                         inode = read_longint(f);
684                 }
685                 if (flist->hlink_pool) {
686                         file->link_u.idev = pool_talloc(flist->hlink_pool,
687                             struct idev, 1, "inode_table");
688                         file->F_INODE = inode;
689                         file->F_DEV = dev;
690                 }
691         }
692 #endif
693
694         if (always_checksum) {
695                 char *sum;
696                 if (sum_len) {
697                         file->u.sum = sum = bp;
698                         /*bp += sum_len;*/
699                 } else if (protocol_version < 28) {
700                         /* Prior to 28, we get a useless set of nulls. */
701                         sum = empty_sum;
702                 } else
703                         sum = NULL;
704                 if (sum) {
705                         read_buf(f, sum,
706                             protocol_version < 21 ? 2 : MD4_SUM_LENGTH);
707                 }
708         }
709
710         if (!preserve_perms) {
711                 extern int orig_umask;
712                 /* set an appropriate set of permissions based on original
713                  * permissions and umask. This emulates what GNU cp does */
714                 file->mode &= ~orig_umask;
715         }
716 }
717
718
719 /**
720  * Create a file_struct for a named file by reading its stat()
721  * information and performing extensive checks against global
722  * options.
723  *
724  * @return the new file, or NULL if there was an error or this file
725  * should be excluded.
726  *
727  * @todo There is a small optimization opportunity here to avoid
728  * stat()ing the file in some circumstances, which has a certain cost.
729  * We are called immediately after doing readdir(), and so we may
730  * already know the d_type of the file.  We could for example avoid
731  * statting directories if we're not recursing, but this is not a very
732  * important case.  Some systems may not have d_type.
733  **/
734 struct file_struct *make_file(char *fname,
735     struct file_list *flist, int exclude_level)
736 {
737         static char *lastdir;
738         static int lastdir_len = -1;
739         struct file_struct *file;
740         STRUCT_STAT st;
741         char sum[SUM_LENGTH];
742         char thisname[MAXPATHLEN];
743         char linkname[MAXPATHLEN];
744         int alloc_len, basename_len, dirname_len, linkname_len, sum_len;
745         char *basename, *dirname, *bp;
746         unsigned short flags = 0;
747
748         if (!flist)     /* lastdir isn't valid if flist is NULL */
749                 lastdir_len = -1;
750
751         if (strlcpy(thisname, fname, sizeof thisname)
752             >= sizeof thisname - flist_dir_len) {
753                 rprintf(FINFO, "skipping overly long name: %s\n", fname);
754                 return NULL;
755         }
756         clean_fname(thisname);
757         if (sanitize_paths)
758                 sanitize_path(thisname, NULL);
759
760         memset(sum, 0, SUM_LENGTH);
761
762         if (readlink_stat(thisname, &st, linkname) != 0) {
763                 int save_errno = errno;
764                 if (errno == ENOENT) {
765                         enum logcode c = am_daemon && protocol_version < 28
766                             ? FERROR : FINFO;
767                         /* either symlink pointing nowhere or file that
768                          * was removed during rsync run; see if excluded
769                          * before reporting an error */
770                         if (exclude_level != NO_EXCLUDES
771                             && check_exclude_file(thisname, 0, exclude_level)) {
772                                 /* file is excluded anyway, ignore silently */
773                                 return NULL;
774                         }
775                         io_error |= IOERR_VANISHED;
776                         rprintf(c, "file has vanished: %s\n",
777                             full_fname(thisname));
778                 }
779                 else {
780                         io_error |= IOERR_GENERAL;
781                         rprintf(FERROR, "readlink %s failed: %s\n",
782                             full_fname(thisname), strerror(save_errno));
783                 }
784                 return NULL;
785         }
786
787         /* backup.c calls us with exclude_level set to NO_EXCLUDES. */
788         if (exclude_level == NO_EXCLUDES)
789                 goto skip_excludes;
790
791         if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
792                 rprintf(FINFO, "skipping directory %s\n", thisname);
793                 return NULL;
794         }
795
796         /* We only care about directories because we need to avoid recursing
797          * into a mount-point directory, not to avoid copying a symlinked
798          * file if -L (or similar) was specified. */
799         if (one_file_system && st.st_dev != filesystem_dev
800             && S_ISDIR(st.st_mode))
801                 flags |= FLAG_MOUNT_POINT;
802
803         if (check_exclude_file(thisname, S_ISDIR(st.st_mode) != 0, exclude_level))
804                 return NULL;
805
806         if (lp_ignore_nonreadable(module_id) && access(thisname, R_OK) != 0)
807                 return NULL;
808
809 skip_excludes:
810
811         if (verbose > 2) {
812                 rprintf(FINFO, "[%s] make_file(%s,*,%d)\n",
813                         who_am_i(), thisname, exclude_level);
814         }
815
816         if ((basename = strrchr(thisname, '/')) != NULL) {
817                 dirname_len = ++basename - thisname; /* counts future '\0' */
818                 if (lastdir_len == dirname_len - 1
819                     && strncmp(thisname, lastdir, lastdir_len) == 0) {
820                         dirname = lastdir;
821                         dirname_len = 0; /* indicates no copy is needed */
822                 } else
823                         dirname = thisname;
824         } else {
825                 basename = thisname;
826                 dirname = NULL;
827                 dirname_len = 0;
828         }
829         basename_len = strlen(basename) + 1; /* count the '\0' */
830
831 #if SUPPORT_LINKS
832         linkname_len = S_ISLNK(st.st_mode) ? strlen(linkname) + 1 : 0;
833 #else
834         linkname_len = 0;
835 #endif
836
837         sum_len = always_checksum && S_ISREG(st.st_mode) ? MD4_SUM_LENGTH : 0;
838
839         alloc_len = file_struct_len + dirname_len + basename_len
840             + linkname_len + sum_len;
841         if (flist) {
842                 bp = pool_alloc(flist->file_pool, alloc_len,
843                     "receive_file_entry");
844         } else {
845                 if (!(bp = new_array(char, alloc_len)))
846                         out_of_memory("receive_file_entry");
847         }
848
849         file = (struct file_struct *)bp;
850         memset(bp, 0, file_struct_len);
851         bp += file_struct_len;
852
853         file->flags = flags;
854         file->modtime = st.st_mtime;
855         file->length = st.st_size;
856         file->mode = st.st_mode;
857         file->uid = st.st_uid;
858         file->gid = st.st_gid;
859
860 #if SUPPORT_HARD_LINKS
861         if (flist && flist->hlink_pool) {
862                 if (protocol_version < 28) {
863                         if (S_ISREG(st.st_mode))
864                                 file->link_u.idev = pool_talloc(
865                                     flist->hlink_pool, struct idev, 1,
866                                     "inode_table");
867                 } else {
868                         if (!S_ISDIR(st.st_mode) && st.st_nlink > 1)
869                                 file->link_u.idev = pool_talloc(
870                                     flist->hlink_pool, struct idev, 1,
871                                     "inode_table");
872                 }
873         }
874         if (file->link_u.idev) {
875                 file->F_DEV = st.st_dev;
876                 file->F_INODE = st.st_ino;
877         }
878 #endif
879
880         if (dirname_len) {
881                 file->dirname = lastdir = bp;
882                 lastdir_len = dirname_len - 1;
883                 memcpy(bp, dirname, dirname_len - 1);
884                 bp += dirname_len;
885                 bp[-1] = '\0';
886         } else if (dirname)
887                 file->dirname = dirname;
888
889         file->basename = bp;
890         memcpy(bp, basename, basename_len);
891         bp += basename_len;
892
893 #ifdef HAVE_STRUCT_STAT_ST_RDEV
894         if (preserve_devices && IS_DEVICE(st.st_mode))
895                 file->u.rdev = st.st_rdev;
896 #endif
897
898 #if SUPPORT_LINKS
899         if (linkname_len) {
900                 file->u.link = bp;
901                 memcpy(bp, linkname, linkname_len);
902                 bp += linkname_len;
903         }
904 #endif
905
906         if (sum_len) {
907                 file->u.sum = bp;
908                 file_checksum(thisname, bp, st.st_size);
909                 /*bp += sum_len;*/
910         }
911
912         file->basedir = flist_dir;
913
914         if (!S_ISDIR(st.st_mode))
915                 stats.total_size += st.st_size;
916
917         return file;
918 }
919
920
921 void send_file_name(int f, struct file_list *flist, char *fname,
922                     int recursive, unsigned short base_flags)
923 {
924         struct file_struct *file;
925         char fbuf[MAXPATHLEN];
926         extern int delete_excluded;
927
928         /* f is set to -1 when calculating deletion file list */
929         file = make_file(fname, flist,
930             f == -1 && delete_excluded? SERVER_EXCLUDES : ALL_EXCLUDES);
931
932         if (!file)
933                 return;
934
935         maybe_emit_filelist_progress(flist);
936
937         flist_expand(flist);
938
939         if (write_batch)
940                 file->flags |= FLAG_TOP_DIR;
941
942         if (file->basename[0]) {
943                 flist->files[flist->count++] = file;
944                 send_file_entry(file, f, base_flags);
945         }
946
947         if (recursive && S_ISDIR(file->mode)
948             && !(file->flags & FLAG_MOUNT_POINT)) {
949                 struct exclude_list_struct last_list = local_exclude_list;
950                 local_exclude_list.head = local_exclude_list.tail = NULL;
951                 send_directory(f, flist, f_name_to(file, fbuf));
952                 free_exclude_list(&local_exclude_list);
953                 local_exclude_list = last_list;
954         }
955 }
956
957
958 static void send_directory(int f, struct file_list *flist, char *dir)
959 {
960         DIR *d;
961         struct dirent *di;
962         char fname[MAXPATHLEN];
963         unsigned int offset;
964         char *p;
965
966         d = opendir(dir);
967         if (!d) {
968                 io_error |= IOERR_GENERAL;
969                 rprintf(FERROR, "opendir %s failed: %s\n",
970                         full_fname(dir), strerror(errno));
971                 return;
972         }
973
974         offset = strlcpy(fname, dir, MAXPATHLEN);
975         p = fname + offset;
976         if (offset >= MAXPATHLEN || p[-1] != '/') {
977                 if (offset >= MAXPATHLEN - 1) {
978                         io_error |= IOERR_GENERAL;
979                         rprintf(FERROR, "skipping long-named directory: %s\n",
980                                 full_fname(fname));
981                         closedir(d);
982                         return;
983                 }
984                 *p++ = '/';
985                 offset++;
986         }
987
988         if (cvs_exclude) {
989                 if (strlcpy(p, ".cvsignore", MAXPATHLEN - offset)
990                     < MAXPATHLEN - offset) {
991                         add_exclude_file(&local_exclude_list, fname,
992                                          XFLG_WORD_SPLIT | XFLG_NO_PREFIXES);
993                 } else {
994                         io_error |= IOERR_GENERAL;
995                         rprintf(FINFO,
996                                 "cannot cvs-exclude in long-named directory %s\n",
997                                 full_fname(fname));
998                 }
999         }
1000
1001         for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
1002                 char *dname = d_name(di);
1003                 if (dname[0] == '.' && (dname[1] == '\0'
1004                     || (dname[1] == '.' && dname[2] == '\0')))
1005                         continue;
1006                 if (strlcpy(p, dname, MAXPATHLEN - offset) < MAXPATHLEN - offset)
1007                         send_file_name(f, flist, fname, recurse, 0);
1008                 else {
1009                         io_error |= IOERR_GENERAL;
1010                         rprintf(FINFO,
1011                                 "cannot send long-named file %s\n",
1012                                 full_fname(fname));
1013                 }
1014         }
1015         if (errno) {
1016                 io_error |= IOERR_GENERAL;
1017                 rprintf(FERROR, "readdir(%s): (%d) %s\n",
1018                         dir, errno, strerror(errno));
1019         }
1020
1021         closedir(d);
1022 }
1023
1024
1025 /**
1026  * The delete_files() function in receiver.c sets f to -1 so that we just
1027  * construct the file list in memory without sending it over the wire.  It
1028  * also has the side-effect of ignoring user-excludes if delete_excluded
1029  * is set (so that the delete list includes user-excluded files).
1030  **/
1031 struct file_list *send_file_list(int f, int argc, char *argv[])
1032 {
1033         int l;
1034         STRUCT_STAT st;
1035         char *p, *dir, olddir[sizeof curr_dir];
1036         char lastpath[MAXPATHLEN] = "";
1037         struct file_list *flist;
1038         int64 start_write;
1039         int use_ff_fd = 0;
1040
1041         if (show_filelist_p() && f != -1)
1042                 start_filelist_progress("building file list");
1043
1044         start_write = stats.total_written;
1045
1046         flist = flist_new(f == -1 ? WITHOUT_HLINK : WITH_HLINK,
1047             "send_file_list");
1048
1049         if (f != -1) {
1050                 io_start_buffering_out(f);
1051                 if (filesfrom_fd >= 0) {
1052                         if (argv[0] && !push_dir(argv[0])) {
1053                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1054                                         full_fname(argv[0]), strerror(errno));
1055                                 exit_cleanup(RERR_FILESELECT);
1056                         }
1057                         use_ff_fd = 1;
1058                 }
1059         }
1060
1061         while (1) {
1062                 char fname2[MAXPATHLEN];
1063                 char *fname = fname2;
1064
1065                 if (use_ff_fd) {
1066                         if (read_filesfrom_line(filesfrom_fd, fname) == 0)
1067                                 break;
1068                         sanitize_path(fname, NULL);
1069                 } else {
1070                         if (argc-- == 0)
1071                                 break;
1072                         strlcpy(fname, *argv++, MAXPATHLEN);
1073                         if (sanitize_paths)
1074                                 sanitize_path(fname, NULL);
1075                 }
1076
1077                 l = strlen(fname);
1078                 if (fname[l - 1] == '/') {
1079                         if (l == 2 && fname[0] == '.') {
1080                                 /* Turn "./" into just "." rather than "./." */
1081                                 fname[1] = '\0';
1082                         } else if (l < MAXPATHLEN) {
1083                                 fname[l++] = '.';
1084                                 fname[l] = '\0';
1085                         }
1086                 }
1087
1088                 if (link_stat(fname, &st) != 0) {
1089                         if (f != -1) {
1090                                 io_error |= IOERR_GENERAL;
1091                                 rprintf(FERROR, "link_stat %s failed: %s\n",
1092                                         full_fname(fname), strerror(errno));
1093                         }
1094                         continue;
1095                 }
1096
1097                 if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
1098                         rprintf(FINFO, "skipping directory %s\n", fname);
1099                         continue;
1100                 }
1101
1102                 dir = NULL;
1103                 olddir[0] = '\0';
1104
1105                 if (!relative_paths) {
1106                         p = strrchr(fname, '/');
1107                         if (p) {
1108                                 *p = 0;
1109                                 if (p == fname)
1110                                         dir = "/";
1111                                 else
1112                                         dir = fname;
1113                                 fname = p + 1;
1114                         }
1115                 } else if (f != -1 && implied_dirs && (p=strrchr(fname,'/')) && p != fname) {
1116                         /* this ensures we send the intermediate directories,
1117                            thus getting their permissions right */
1118                         char *lp = lastpath, *fn = fname, *slash = fname;
1119                         *p = 0;
1120                         /* Skip any initial directories in our path that we
1121                          * have in common with lastpath. */
1122                         while (*fn && *lp == *fn) {
1123                                 if (*fn == '/')
1124                                         slash = fn;
1125                                 lp++, fn++;
1126                         }
1127                         *p = '/';
1128                         if (fn != p || (*lp && *lp != '/')) {
1129                                 int copy_links_saved = copy_links;
1130                                 int recurse_saved = recurse;
1131                                 copy_links = copy_unsafe_links;
1132                                 /* set recurse to 1 to prevent make_file
1133                                  * from ignoring directory, but still
1134                                  * turn off the recursive parameter to
1135                                  * send_file_name */
1136                                 recurse = 1;
1137                                 while ((slash = strchr(slash+1, '/')) != 0) {
1138                                         *slash = 0;
1139                                         send_file_name(f, flist, fname, 0, 0);
1140                                         *slash = '/';
1141                                 }
1142                                 copy_links = copy_links_saved;
1143                                 recurse = recurse_saved;
1144                                 *p = 0;
1145                                 strlcpy(lastpath, fname, sizeof lastpath);
1146                                 *p = '/';
1147                         }
1148                 }
1149
1150                 if (!*fname)
1151                         fname = ".";
1152
1153                 if (dir && *dir) {
1154                         static char *lastdir;
1155                         static int lastdir_len;
1156
1157                         strcpy(olddir, curr_dir); /* can't overflow */
1158
1159                         if (!push_dir(dir)) {
1160                                 io_error |= IOERR_GENERAL;
1161                                 rprintf(FERROR, "push_dir %s failed: %s\n",
1162                                         full_fname(dir), strerror(errno));
1163                                 continue;
1164                         }
1165
1166                         if (lastdir && strcmp(lastdir, dir) == 0) {
1167                                 flist_dir = lastdir;
1168                                 flist_dir_len = lastdir_len;
1169                         } else {
1170                                 flist_dir = lastdir = strdup(dir);
1171                                 flist_dir_len = lastdir_len = strlen(dir);
1172                         }
1173                 }
1174
1175                 if (one_file_system)
1176                         set_filesystem(fname);
1177
1178                 send_file_name(f, flist, fname, recurse, XMIT_TOP_DIR);
1179
1180                 if (olddir[0]) {
1181                         flist_dir = NULL;
1182                         flist_dir_len = 0;
1183                         if (!pop_dir(olddir)) {
1184                                 rprintf(FERROR, "pop_dir %s failed: %s\n",
1185                                         full_fname(dir), strerror(errno));
1186                                 exit_cleanup(RERR_FILESELECT);
1187                         }
1188                 }
1189         }
1190
1191         if (f != -1) {
1192                 send_file_entry(NULL, f, 0);
1193
1194                 if (show_filelist_p())
1195                         finish_filelist_progress(flist);
1196         }
1197
1198         if (flist->hlink_pool) {
1199                 pool_destroy(flist->hlink_pool);
1200                 flist->hlink_pool = NULL;
1201         }
1202
1203         clean_flist(flist, 0, 0);
1204
1205         if (f != -1) {
1206                 /* Now send the uid/gid list. This was introduced in
1207                  * protocol version 15 */
1208                 send_uid_list(f);
1209
1210                 /* send the io_error flag */
1211                 write_int(f, lp_ignore_errors(module_id) ? 0 : io_error);
1212
1213                 io_end_buffering();
1214                 stats.flist_size = stats.total_written - start_write;
1215                 stats.num_files = flist->count;
1216                 if (write_batch)
1217                         write_batch_flist_info(flist->count, flist->files);
1218         }
1219
1220         if (verbose > 3)
1221                 output_flist(flist);
1222
1223         if (verbose > 2)
1224                 rprintf(FINFO, "send_file_list done\n");
1225
1226         return flist;
1227 }
1228
1229
1230 struct file_list *recv_file_list(int f)
1231 {
1232         struct file_list *flist;
1233         unsigned short flags;
1234         int64 start_read;
1235         extern int list_only;
1236
1237         if (show_filelist_p())
1238                 start_filelist_progress("receiving file list");
1239
1240         start_read = stats.total_read;
1241
1242         flist = flist_new(WITH_HLINK, "recv_file_list");
1243
1244         flist->count = 0;
1245         flist->malloced = 1000;
1246         flist->files = new_array(struct file_struct *, flist->malloced);
1247         if (!flist->files)
1248                 goto oom;
1249
1250
1251         while ((flags = read_byte(f)) != 0) {
1252                 int i = flist->count;
1253
1254                 flist_expand(flist);
1255
1256                 if (protocol_version >= 28 && (flags & XMIT_EXTENDED_FLAGS))
1257                         flags |= read_byte(f) << 8;
1258                 receive_file_entry(&flist->files[i], flags, flist, f);
1259
1260                 if (S_ISREG(flist->files[i]->mode))
1261                         stats.total_size += flist->files[i]->length;
1262
1263                 flist->count++;
1264
1265                 maybe_emit_filelist_progress(flist);
1266
1267                 if (verbose > 2) {
1268                         rprintf(FINFO, "recv_file_name(%s)\n",
1269                                 f_name(flist->files[i]));
1270                 }
1271         }
1272         receive_file_entry(NULL, 0, NULL, 0); /* Signal that we're done. */
1273
1274         if (verbose > 2)
1275                 rprintf(FINFO, "received %d names\n", flist->count);
1276
1277         if (show_filelist_p())
1278                 finish_filelist_progress(flist);
1279
1280         clean_flist(flist, relative_paths, 1);
1281
1282         if (f != -1) {
1283                 /* Now send the uid/gid list. This was introduced in
1284                  * protocol version 15 */
1285                 recv_uid_list(f, flist);
1286
1287                 if (!read_batch) {
1288                         /* Recv the io_error flag */
1289                         if (lp_ignore_errors(module_id) || ignore_errors)
1290                                 read_int(f);
1291                         else
1292                                 io_error |= read_int(f);
1293                 }
1294         }
1295
1296         if (verbose > 3)
1297                 output_flist(flist);
1298
1299         if (list_only) {
1300                 int i;
1301                 for (i = 0; i < flist->count; i++)
1302                         list_file_entry(flist->files[i]);
1303         }
1304
1305         if (verbose > 2)
1306                 rprintf(FINFO, "recv_file_list done\n");
1307
1308         stats.flist_size = stats.total_read - start_read;
1309         stats.num_files = flist->count;
1310
1311         return flist;
1312
1313 oom:
1314         out_of_memory("recv_file_list");
1315         return NULL;            /* not reached */
1316 }
1317
1318
1319 int file_compare(struct file_struct **file1, struct file_struct **file2)
1320 {
1321         struct file_struct *f1 = *file1;
1322         struct file_struct *f2 = *file2;
1323
1324         if (!f1->basename && !f2->basename)
1325                 return 0;
1326         if (!f1->basename)
1327                 return -1;
1328         if (!f2->basename)
1329                 return 1;
1330         if (f1->dirname == f2->dirname)
1331                 return u_strcmp(f1->basename, f2->basename);
1332         return f_name_cmp(f1, f2);
1333 }
1334
1335
1336 int flist_find(struct file_list *flist, struct file_struct *f)
1337 {
1338         int low = 0, high = flist->count - 1;
1339
1340         while (high >= 0 && !flist->files[high]->basename) high--;
1341
1342         if (high < 0)
1343                 return -1;
1344
1345         while (low != high) {
1346                 int mid = (low + high) / 2;
1347                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
1348                 if (ret == 0)
1349                         return flist_up(flist, mid);
1350                 if (ret > 0)
1351                         high = mid;
1352                 else
1353                         low = mid + 1;
1354         }
1355
1356         if (file_compare(&flist->files[flist_up(flist, low)], &f) == 0)
1357                 return flist_up(flist, low);
1358         return -1;
1359 }
1360
1361 /*
1362  * Free up any resources a file_struct has allocated
1363  * and clear the file.
1364  */
1365 void clear_file(int i, struct file_list *flist)
1366 {
1367         if (flist->hlink_pool && flist->files[i]->link_u.idev)
1368                 pool_free(flist->hlink_pool, 0, flist->files[i]->link_u.idev);
1369         memset(flist->files[i], 0, file_struct_len);
1370 }
1371
1372
1373 /*
1374  * allocate a new file list
1375  */
1376 struct file_list *flist_new(int with_hlink, char *msg)
1377 {
1378         struct file_list *flist;
1379
1380         flist = new(struct file_list);
1381         if (!flist)
1382                 out_of_memory(msg);
1383
1384         memset(flist, 0, sizeof (struct file_list));
1385
1386         if (!(flist->file_pool = pool_create(FILE_EXTENT, 0,
1387             out_of_memory, POOL_INTERN)))
1388                 out_of_memory(msg);
1389
1390 #if SUPPORT_HARD_LINKS
1391         if (with_hlink && preserve_hard_links) {
1392                 if (!(flist->hlink_pool = pool_create(HLINK_EXTENT,
1393                     sizeof (struct idev), out_of_memory, POOL_INTERN)))
1394                         out_of_memory(msg);
1395         }
1396 #endif
1397
1398         return flist;
1399 }
1400
1401 /*
1402  * free up all elements in a flist
1403  */
1404 void flist_free(struct file_list *flist)
1405 {
1406         pool_destroy(flist->file_pool);
1407         pool_destroy(flist->hlink_pool);
1408         free(flist->files);
1409         free(flist);
1410 }
1411
1412
1413 /*
1414  * This routine ensures we don't have any duplicate names in our file list.
1415  * duplicate names can cause corruption because of the pipelining
1416  */
1417 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
1418 {
1419         int i, prev_i = 0;
1420
1421         if (!flist || flist->count == 0)
1422                 return;
1423
1424         qsort(flist->files, flist->count,
1425             sizeof flist->files[0], (int (*)()) file_compare);
1426
1427         for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
1428                 if (flist->files[i]->basename) {
1429                         prev_i = i;
1430                         break;
1431                 }
1432         }
1433         while (++i < flist->count) {
1434                 if (!flist->files[i]->basename)
1435                         continue;
1436                 if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
1437                         if (verbose > 1 && !am_server) {
1438                                 rprintf(FINFO,
1439                                         "removing duplicate name %s from file list %d\n",
1440                                         f_name(flist->files[i]), i);
1441                         }
1442                         /* Make sure that if we unduplicate '.', that we don't
1443                          * lose track of a user-specified starting point (or
1444                          * else deletions will mysteriously fail with -R). */
1445                         if (flist->files[i]->flags & FLAG_TOP_DIR)
1446                                 flist->files[prev_i]->flags |= FLAG_TOP_DIR;
1447
1448                         clear_file(i, flist);
1449                 } else
1450                         prev_i = i;
1451         }
1452
1453         if (strip_root) {
1454                 /* we need to strip off the root directory in the case
1455                    of relative paths, but this must be done _after_
1456                    the sorting phase */
1457                 for (i = 0; i < flist->count; i++) {
1458                         if (flist->files[i]->dirname &&
1459                             flist->files[i]->dirname[0] == '/') {
1460                                 memmove(&flist->files[i]->dirname[0],
1461                                         &flist->files[i]->dirname[1],
1462                                         strlen(flist->files[i]->dirname));
1463                         }
1464
1465                         if (flist->files[i]->dirname &&
1466                             !flist->files[i]->dirname[0]) {
1467                                 flist->files[i]->dirname = NULL;
1468                         }
1469                 }
1470         }
1471 }
1472
1473 static void output_flist(struct file_list *flist)
1474 {
1475         char uidbuf[16], gidbuf[16];
1476         struct file_struct *file;
1477         int i;
1478
1479         for (i = 0; i < flist->count; i++) {
1480                 file = flist->files[i];
1481                 if (am_root && preserve_uid)
1482                         sprintf(uidbuf, " uid=%ld", (long)file->uid);
1483                 else
1484                         *uidbuf = '\0';
1485                 if (preserve_gid && file->gid != GID_NONE)
1486                         sprintf(gidbuf, " gid=%ld", (long)file->gid);
1487                 else
1488                         *gidbuf = '\0';
1489                 rprintf(FINFO, "[%s] i=%d %s %s %s mode=0%o len=%.0f%s%s\n",
1490                         who_am_i(), i, NS(file->basedir), NS(file->dirname),
1491                         NS(file->basename), (int) file->mode,
1492                         (double) file->length, uidbuf, gidbuf);
1493         }
1494 }
1495
1496
1497 enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
1498
1499 /* Compare the names of two file_struct entities, just like strcmp()
1500  * would do if it were operating on the joined strings.  We assume
1501  * that there are no 0-length strings.
1502  */
1503 int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
1504 {
1505         int dif;
1506         const uchar *c1, *c2;
1507         enum fnc_state state1, state2;
1508
1509         if (!f1 || !f1->basename) {
1510                 if (!f2 || !f2->basename)
1511                         return 0;
1512                 return -1;
1513         }
1514         if (!f2 || !f2->basename)
1515                 return 1;
1516
1517         if (!(c1 = (uchar*)f1->dirname)) {
1518                 state1 = fnc_BASE;
1519                 c1 = (uchar*)f1->basename;
1520         } else
1521                 state1 = fnc_DIR;
1522         if (!(c2 = (uchar*)f2->dirname)) {
1523                 state2 = fnc_BASE;
1524                 c2 = (uchar*)f2->basename;
1525         } else
1526                 state2 = fnc_DIR;
1527
1528         while (1) {
1529                 if ((dif = (int)*c1 - (int)*c2) != 0)
1530                         break;
1531                 if (!*++c1) {
1532                         switch (state1) {
1533                         case fnc_DIR:
1534                                 state1 = fnc_SLASH;
1535                                 c1 = (uchar*)"/";
1536                                 break;
1537                         case fnc_SLASH:
1538                                 state1 = fnc_BASE;
1539                                 c1 = (uchar*)f1->basename;
1540                                 break;
1541                         case fnc_BASE:
1542                                 break;
1543                         }
1544                 }
1545                 if (!*++c2) {
1546                         switch (state2) {
1547                         case fnc_DIR:
1548                                 state2 = fnc_SLASH;
1549                                 c2 = (uchar*)"/";
1550                                 break;
1551                         case fnc_SLASH:
1552                                 state2 = fnc_BASE;
1553                                 c2 = (uchar*)f2->basename;
1554                                 break;
1555                         case fnc_BASE:
1556                                 if (!*c1)
1557                                         return 0;
1558                                 break;
1559                         }
1560                 }
1561         }
1562
1563         return dif;
1564 }
1565
1566
1567 /* Return a copy of the full filename of a flist entry, using the indicated
1568  * buffer.  No size-checking is done because we checked the size when creating
1569  * the file_struct entry.
1570  */
1571 char *f_name_to(struct file_struct *f, char *fbuf)
1572 {
1573         if (!f || !f->basename)
1574                 return NULL;
1575
1576         if (f->dirname) {
1577                 int len = strlen(f->dirname);
1578                 memcpy(fbuf, f->dirname, len);
1579                 fbuf[len] = '/';
1580                 strcpy(fbuf + len + 1, f->basename);
1581         } else
1582                 strcpy(fbuf, f->basename);
1583         return fbuf;
1584 }
1585
1586
1587 /* Like f_name_to(), but we rotate through 5 static buffers of our own.
1588  */
1589 char *f_name(struct file_struct *f)
1590 {
1591         static char names[5][MAXPATHLEN];
1592         static unsigned int n;
1593
1594         n = (n + 1) % (sizeof names / sizeof names[0]);
1595
1596         return f_name_to(f, names[n]);
1597 }