changed strlcat() and strlcpy() to have the same semantics as the
[rsync.git] / flist.c
1 /* 
2    Copyright (C) Andrew Tridgell 1996
3    Copyright (C) Paul Mackerras 1996
4    
5    This program is free software; you can redistribute it and/or modify
6    it under the terms of the GNU General Public License as published by
7    the Free Software Foundation; either version 2 of the License, or
8    (at your option) any later version.
9    
10    This program is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13    GNU General Public License for more details.
14    
15    You should have received a copy of the GNU General Public License
16    along with this program; if not, write to the Free Software
17    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19
20 /* generate and receive file lists */
21
22 #include "rsync.h"
23
24 extern struct stats stats;
25
26 extern int csum_length;
27
28 extern int verbose;
29 extern int am_server;
30 extern int always_checksum;
31
32 extern int cvs_exclude;
33
34 extern int recurse;
35
36 extern int one_file_system;
37 extern int make_backups;
38 extern int preserve_links;
39 extern int preserve_hard_links;
40 extern int preserve_perms;
41 extern int preserve_devices;
42 extern int preserve_uid;
43 extern int preserve_gid;
44 extern int preserve_times;
45 extern int relative_paths;
46 extern int copy_links;
47 extern int remote_version;
48 extern int io_error;
49
50 static struct exclude_struct **local_exclude_list;
51
52 static void clean_flist(struct file_list *flist, int strip_root);
53
54
55 static void list_file_entry(struct file_struct *f)
56 {
57         char perms[11] = "----------";
58         char *perm_map = "rwxrwxrwx";
59         int i;
60
61         for (i=0;i<9;i++) {
62                 if (f->mode & (1<<i)) perms[9-i] = perm_map[8-i];
63         }
64         if (S_ISLNK(f->mode)) perms[0] = 'l';
65         if (S_ISDIR(f->mode)) perms[0] = 'd';
66         if (S_ISBLK(f->mode)) perms[0] = 'b';
67         if (S_ISCHR(f->mode)) perms[0] = 'c';
68         if (S_ISSOCK(f->mode)) perms[0] = 's';
69         if (S_ISFIFO(f->mode)) perms[0] = 'p';
70         
71         if (preserve_links && S_ISLNK(f->mode)) {
72                 rprintf(FINFO,"%s %11.0f %s %s -> %s\n", 
73                         perms, 
74                         (double)f->length, timestring(f->modtime), 
75                         f_name(f), f->link);
76         } else {
77                 rprintf(FINFO,"%s %11.0f %s %s\n", 
78                         perms, 
79                         (double)f->length, timestring(f->modtime), f_name(f));
80         }
81 }
82
83
84 int link_stat(const char *Path, STRUCT_STAT *Buffer) 
85 {
86 #if SUPPORT_LINKS
87     if (copy_links) {
88         return do_stat(Path, Buffer);
89     } else {
90         return do_lstat(Path, Buffer);
91     }
92 #else
93     return do_stat(Path, Buffer);
94 #endif
95 }
96
97 /*
98   This function is used to check if a file should be included/excluded
99   from the list of files based on its name and type etc
100  */
101 static int match_file_name(char *fname,STRUCT_STAT *st)
102 {
103   if (check_exclude(fname,local_exclude_list,st)) {
104     if (verbose > 2)
105       rprintf(FINFO,"excluding file %s\n",fname);
106     return 0;
107   }
108   return 1;
109 }
110
111 /* used by the one_file_system code */
112 static dev_t filesystem_dev;
113
114 static void set_filesystem(char *fname)
115 {
116   STRUCT_STAT st;
117   if (link_stat(fname,&st) != 0) return;
118   filesystem_dev = st.st_dev;
119 }
120
121
122 static int to_wire_mode(mode_t mode)
123 {
124         if (S_ISLNK(mode) && (S_IFLNK != 0120000)) {
125                 return (mode & ~(_S_IFMT)) | 0120000;
126         }
127         return (int)mode;
128 }
129
130 static mode_t from_wire_mode(int mode)
131 {
132         if ((mode & (_S_IFMT)) == 0120000 && (S_IFLNK != 0120000)) {
133                 return (mode & ~(_S_IFMT)) | S_IFLNK;
134         }
135         return (mode_t)mode;
136 }
137
138
139 static void send_directory(int f,struct file_list *flist,char *dir);
140
141 static char *flist_dir;
142
143
144 static void send_file_entry(struct file_struct *file,int f,unsigned base_flags)
145 {
146         unsigned char flags;
147         static time_t last_time;
148         static mode_t last_mode;
149         static dev_t last_rdev;
150         static uid_t last_uid;
151         static gid_t last_gid;
152         static char lastname[MAXPATHLEN];
153         char *fname;
154         int l1,l2;
155
156         if (f == -1) return;
157
158         if (!file) {
159                 write_byte(f,0);
160                 return;
161         }
162
163         fname = f_name(file);
164
165         flags = base_flags;
166
167         if (file->mode == last_mode) flags |= SAME_MODE;
168         if (file->rdev == last_rdev) flags |= SAME_RDEV;
169         if (file->uid == last_uid) flags |= SAME_UID;
170         if (file->gid == last_gid) flags |= SAME_GID;
171         if (file->modtime == last_time) flags |= SAME_TIME;
172
173         for (l1=0;lastname[l1] && (fname[l1] == lastname[l1]) && (l1 < 255);l1++) ;  
174         l2 = strlen(fname) - l1;
175
176         if (l1 > 0) flags |= SAME_NAME;
177         if (l2 > 255) flags |= LONG_NAME;
178
179         /* we must make sure we don't send a zero flags byte or the other
180            end will terminate the flist transfer */
181         if (flags == 0 && !S_ISDIR(file->mode)) flags |= FLAG_DELETE;
182         if (flags == 0) flags |= LONG_NAME;
183
184         write_byte(f,flags);  
185         if (flags & SAME_NAME)
186                 write_byte(f,l1);
187         if (flags & LONG_NAME)
188                 write_int(f,l2);
189         else
190                 write_byte(f,l2);
191         write_buf(f,fname+l1,l2);
192
193         write_longint(f,file->length);
194         if (!(flags & SAME_TIME))
195                 write_int(f,(int)file->modtime);
196         if (!(flags & SAME_MODE))
197                 write_int(f,to_wire_mode(file->mode));
198         if (preserve_uid && !(flags & SAME_UID)) {
199                 add_uid(file->uid);
200                 write_int(f,(int)file->uid);
201         }
202         if (preserve_gid && !(flags & SAME_GID)) {
203                 add_gid(file->gid);
204                 write_int(f,(int)file->gid);
205         }
206         if (preserve_devices && IS_DEVICE(file->mode) && !(flags & SAME_RDEV))
207                 write_int(f,(int)file->rdev);
208
209 #if SUPPORT_LINKS
210         if (preserve_links && S_ISLNK(file->mode)) {
211                 write_int(f,strlen(file->link));
212                 write_buf(f,file->link,strlen(file->link));
213         }
214 #endif
215
216 #if SUPPORT_HARD_LINKS
217         if (preserve_hard_links && S_ISREG(file->mode)) {
218                 write_int(f,(int)file->dev);
219                 write_int(f,(int)file->inode);
220         }
221 #endif
222
223         if (always_checksum) {
224                 write_buf(f,file->sum,csum_length);
225         }       
226
227         last_mode = file->mode;
228         last_rdev = file->rdev;
229         last_uid = file->uid;
230         last_gid = file->gid;
231         last_time = file->modtime;
232
233         strlcpy(lastname,fname,MAXPATHLEN);
234         lastname[MAXPATHLEN-1] = 0;
235 }
236
237
238
239 static void receive_file_entry(struct file_struct **fptr,
240                                unsigned flags,int f)
241 {
242         static time_t last_time;
243         static mode_t last_mode;
244         static dev_t last_rdev;
245         static uid_t last_uid;
246         static gid_t last_gid;
247         static char lastname[MAXPATHLEN];
248         char thisname[MAXPATHLEN];
249         int l1=0,l2=0;
250         char *p;
251         struct file_struct *file;
252
253         if (flags & SAME_NAME)
254                 l1 = read_byte(f);
255   
256         if (flags & LONG_NAME)
257                 l2 = read_int(f);
258         else
259                 l2 = read_byte(f);
260
261         file = (struct file_struct *)malloc(sizeof(*file));
262         if (!file) out_of_memory("receive_file_entry");
263         memset((char *)file, 0, sizeof(*file));
264         (*fptr) = file;
265
266         if (l2 >= MAXPATHLEN-l1) overflow("receive_file_entry");
267
268         strlcpy(thisname,lastname,l1+1);
269         read_sbuf(f,&thisname[l1],l2);
270         thisname[l1+l2] = 0;
271
272         strlcpy(lastname,thisname,MAXPATHLEN);
273         lastname[MAXPATHLEN-1] = 0;
274
275         clean_fname(thisname);
276
277         if ((p = strrchr(thisname,'/'))) {
278                 static char *lastdir;
279                 *p = 0;
280                 if (lastdir && strcmp(thisname, lastdir)==0) {
281                         file->dirname = lastdir;
282                 } else {
283                         file->dirname = strdup(thisname);
284                         lastdir = file->dirname;
285                 }
286                 file->basename = strdup(p+1);
287         } else {
288                 file->dirname = NULL;
289                 file->basename = strdup(thisname);
290         }
291
292         if (!file->basename) out_of_memory("receive_file_entry 1");
293
294
295         file->flags = flags;
296         file->length = read_longint(f);
297         file->modtime = (flags & SAME_TIME) ? last_time : (time_t)read_int(f);
298         file->mode = (flags & SAME_MODE) ? last_mode : from_wire_mode(read_int(f));
299         if (preserve_uid)
300                 file->uid = (flags & SAME_UID) ? last_uid : (uid_t)read_int(f);
301         if (preserve_gid)
302                 file->gid = (flags & SAME_GID) ? last_gid : (gid_t)read_int(f);
303         if (preserve_devices && IS_DEVICE(file->mode))
304                 file->rdev = (flags & SAME_RDEV) ? last_rdev : (dev_t)read_int(f);
305
306         if (preserve_links && S_ISLNK(file->mode)) {
307                 int l = read_int(f);
308                 file->link = (char *)malloc(l+1);
309                 if (!file->link) out_of_memory("receive_file_entry 2");
310                 read_sbuf(f,file->link,l);
311         }
312
313 #if SUPPORT_HARD_LINKS
314         if (preserve_hard_links && S_ISREG(file->mode)) {
315                 file->dev = read_int(f);
316                 file->inode = read_int(f);
317         }
318 #endif
319   
320         if (always_checksum) {
321                 file->sum = (char *)malloc(MD4_SUM_LENGTH);
322                 if (!file->sum) out_of_memory("md4 sum");
323                 read_buf(f,file->sum,csum_length);
324         }
325   
326         last_mode = file->mode;
327         last_rdev = file->rdev;
328         last_uid = file->uid;
329         last_gid = file->gid;
330         last_time = file->modtime;
331
332         if (!preserve_perms) {
333                 extern int orig_umask;
334                 /* set an appropriate set of permissions based on original
335                    permissions and umask. This emulates what GNU cp does */
336                 file->mode &= ~orig_umask;
337         }
338 }
339
340
341 /* determine if a file in a different filesstem should be skipped
342    when one_file_system is set. We bascally only want to include
343    the mount points - but they can be hard to find! */
344 static int skip_filesystem(char *fname, STRUCT_STAT *st)
345 {
346         STRUCT_STAT st2;
347         char *p = strrchr(fname, '/');
348
349         /* skip all but directories */
350         if (!S_ISDIR(st->st_mode)) return 1;
351
352         /* if its not a subdirectory then allow */
353         if (!p) return 0;
354
355         *p = 0;
356         if (link_stat(fname, &st2)) {
357                 *p = '/';
358                 return 0;
359         }
360         *p = '/';
361         
362         return (st2.st_dev != filesystem_dev);
363 }
364
365 static struct file_struct *make_file(char *fname)
366 {
367         struct file_struct *file;
368         STRUCT_STAT st;
369         char sum[SUM_LENGTH];
370         char *p;
371         char cleaned_name[MAXPATHLEN];
372
373         strlcpy(cleaned_name, fname, MAXPATHLEN);
374         cleaned_name[MAXPATHLEN-1] = 0;
375         clean_fname(cleaned_name);
376         fname = cleaned_name;
377
378         memset(sum,0,SUM_LENGTH);
379
380         if (link_stat(fname,&st) != 0) {
381                 io_error = 1;
382                 rprintf(FERROR,"%s: %s\n",
383                         fname,strerror(errno));
384                 return NULL;
385         }
386
387         if (S_ISDIR(st.st_mode) && !recurse) {
388                 rprintf(FINFO,"skipping directory %s\n",fname);
389                 return NULL;
390         }
391         
392         if (one_file_system && st.st_dev != filesystem_dev) {
393                 if (skip_filesystem(fname, &st))
394                         return NULL;
395         }
396         
397         if (!match_file_name(fname,&st))
398                 return NULL;
399         
400         if (verbose > 2)
401                 rprintf(FINFO,"make_file(%s)\n",fname);
402         
403         file = (struct file_struct *)malloc(sizeof(*file));
404         if (!file) out_of_memory("make_file");
405         memset((char *)file,0,sizeof(*file));
406
407         if ((p = strrchr(fname,'/'))) {
408                 static char *lastdir;
409                 *p = 0;
410                 if (lastdir && strcmp(fname, lastdir)==0) {
411                         file->dirname = lastdir;
412                 } else {
413                         file->dirname = strdup(fname);
414                         lastdir = file->dirname;
415                 }
416                 file->basename = strdup(p+1);
417                 *p = '/';
418         } else {
419                 file->dirname = NULL;
420                 file->basename = strdup(fname);
421         }
422
423         file->modtime = st.st_mtime;
424         file->length = st.st_size;
425         file->mode = st.st_mode;
426         file->uid = st.st_uid;
427         file->gid = st.st_gid;
428         file->dev = st.st_dev;
429         file->inode = st.st_ino;
430 #ifdef HAVE_ST_RDEV
431         file->rdev = st.st_rdev;
432 #endif
433
434 #if SUPPORT_LINKS
435         if (S_ISLNK(st.st_mode)) {
436                 int l;
437                 char lnk[MAXPATHLEN];
438                 if ((l=readlink(fname,lnk,MAXPATHLEN-1)) == -1) {
439                         io_error=1;
440                         rprintf(FERROR,"readlink %s : %s\n",
441                                 fname,strerror(errno));
442                         return NULL;
443                 }
444                 lnk[l] = 0;
445                 file->link = strdup(lnk);
446         }
447 #endif
448
449         if (always_checksum) {
450                 file->sum = (char *)malloc(MD4_SUM_LENGTH);
451                 if (!file->sum) out_of_memory("md4 sum");
452                 /* drat. we have to provide a null checksum for non-regular
453                    files in order to be compatible with earlier versions
454                    of rsync */
455                 if (S_ISREG(st.st_mode)) {
456                         file_checksum(fname,file->sum,st.st_size);
457                 } else {
458                         memset(file->sum, 0, MD4_SUM_LENGTH);
459                 }
460         }       
461
462         if (flist_dir) {
463                 static char *lastdir;
464                 if (lastdir && strcmp(lastdir, flist_dir)==0) {
465                         file->basedir = lastdir;
466                 } else {
467                         file->basedir = strdup(flist_dir);
468                         lastdir = file->basedir;
469                 }
470         } else {
471                 file->basedir = NULL;
472         }
473
474         if (!S_ISDIR(st.st_mode))
475                 stats.total_size += st.st_size;
476
477         return file;
478 }
479
480
481
482 void send_file_name(int f,struct file_list *flist,char *fname,
483                            int recursive, unsigned base_flags)
484 {
485   struct file_struct *file;
486
487   file = make_file(fname);
488
489   if (!file) return;  
490   
491   if (flist->count >= flist->malloced) {
492           if (flist->malloced < 1000)
493                   flist->malloced += 1000;
494           else
495                   flist->malloced *= 2;
496           flist->files = (struct file_struct **)realloc(flist->files,
497                                                         sizeof(flist->files[0])*
498                                                         flist->malloced);
499           if (!flist->files)
500                   out_of_memory("send_file_name");
501   }
502
503   if (strcmp(file->basename,"")) {
504     flist->files[flist->count++] = file;
505     send_file_entry(file,f,base_flags);
506   }
507
508   if (S_ISDIR(file->mode) && recursive) {
509           struct exclude_struct **last_exclude_list = local_exclude_list;
510           send_directory(f,flist,f_name(file));
511           local_exclude_list = last_exclude_list;
512           return;
513   }
514 }
515
516
517
518 static void send_directory(int f,struct file_list *flist,char *dir)
519 {
520         DIR *d;
521         struct dirent *di;
522         char fname[MAXPATHLEN];
523         int l;
524         char *p;
525
526         d = opendir(dir);
527         if (!d) {
528                 io_error = 1;
529                 rprintf(FERROR,"opendir(%s): %s\n",
530                         dir,strerror(errno));
531                 return;
532         }
533
534         strlcpy(fname,dir,MAXPATHLEN);
535         l = strlen(fname);
536         if (fname[l-1] != '/') {
537                 if (l == MAXPATHLEN-1) {
538                         io_error = 1;
539                         rprintf(FERROR,"skipping long-named directory %s\n",fname);
540                         closedir(d);
541                         return;
542                 }
543                 strlcat(fname,"/", MAXPATHLEN);
544                 l++;
545         }
546         p = fname + strlen(fname);
547
548         local_exclude_list = NULL;
549
550         if (cvs_exclude) {
551                 if (strlen(fname) + strlen(".cvsignore") <= MAXPATHLEN-1) {
552                         strcpy(p,".cvsignore");
553                         local_exclude_list = make_exclude_list(fname,NULL,0,0);
554                 } else {
555                         io_error = 1;
556                         rprintf(FINFO,"cannot cvs-exclude in long-named directory %s\n",fname);
557                 }
558         }  
559         
560         for (di=readdir(d); di; di=readdir(d)) {
561                 char *dname = d_name(di);
562                 if (strcmp(dname,".")==0 ||
563                     strcmp(dname,"..")==0)
564                         continue;
565                 strlcpy(p,dname,MAXPATHLEN-l);
566                 send_file_name(f,flist,fname,recurse,0);
567         }
568
569         if (local_exclude_list) {
570                 add_exclude_list("!", &local_exclude_list, 0);
571         }
572
573         closedir(d);
574 }
575
576
577
578 struct file_list *send_file_list(int f,int argc,char *argv[])
579 {
580         int i,l;
581         STRUCT_STAT st;
582         char *p,*dir,*olddir;
583         char lastpath[MAXPATHLEN]="";
584         struct file_list *flist;
585         int64 start_write;
586
587         if (verbose && recurse && !am_server && f != -1) {
588                 rprintf(FINFO,"building file list ... ");
589                 rflush(FINFO);
590         }
591
592         start_write = stats.total_written;
593
594         flist = (struct file_list *)malloc(sizeof(flist[0]));
595         if (!flist) out_of_memory("send_file_list");
596
597         flist->count=0;
598         flist->malloced = 1000;
599         flist->files = (struct file_struct **)malloc(sizeof(flist->files[0])*
600                                                      flist->malloced);
601         if (!flist->files) out_of_memory("send_file_list");
602
603         if (f != -1) {
604                 io_start_buffering(f);
605         }
606
607         for (i=0;i<argc;i++) {
608                 char fname2[MAXPATHLEN];
609                 char *fname = fname2;
610
611                 strlcpy(fname,argv[i],MAXPATHLEN);
612
613                 l = strlen(fname);
614                 if (l != 1 && fname[l-1] == '/') {
615                         strlcat(fname,".",MAXPATHLEN);
616                 }
617
618                 if (link_stat(fname,&st) != 0) {
619                         io_error=1;
620                         rprintf(FERROR,"%s : %s\n",fname,strerror(errno));
621                         continue;
622                 }
623
624                 if (S_ISDIR(st.st_mode) && !recurse) {
625                         rprintf(FINFO,"skipping directory %s\n",fname);
626                         continue;
627                 }
628
629                 dir = NULL;
630                 olddir = NULL;
631
632                 if (!relative_paths) {
633                         p = strrchr(fname,'/');
634                         if (p) {
635                                 *p = 0;
636                                 if (p == fname) 
637                                         dir = "/";
638                                 else
639                                         dir = fname;      
640                                 fname = p+1;      
641                         }
642                 } else if (f != -1 && (p=strrchr(fname,'/'))) {
643                         /* this ensures we send the intermediate directories,
644                            thus getting their permissions right */
645                         *p = 0;
646                         if (strcmp(lastpath,fname)) {
647                                 strlcpy(lastpath, fname, sizeof(lastpath));
648                                 *p = '/';
649                                 for (p=fname+1; (p=strchr(p,'/')); p++) {
650                                         int copy_links_saved = copy_links;
651                                         *p = 0;
652                                         copy_links = 0;
653                                         send_file_name(f, flist, fname, 0, 0);
654                                         copy_links = copy_links_saved;
655                                         *p = '/';
656                                 }
657                         } else {
658                                 *p = '/';
659                         }
660                 }
661                 
662                 if (!*fname)
663                         fname = ".";
664                 
665                 if (dir && *dir) {
666                         olddir = push_dir(dir, 1);
667
668                         if (!olddir) {
669                                 io_error=1;
670                                 rprintf(FERROR,"push_dir %s : %s\n",
671                                         dir,strerror(errno));
672                                 continue;
673                         }
674
675                         flist_dir = dir;
676                 }
677                 
678                 if (one_file_system)
679                         set_filesystem(fname);
680
681                 if (!recurse || !send_included_file_names(f,flist))
682                         send_file_name(f,flist,fname,recurse,FLAG_DELETE);
683
684                 if (olddir != NULL) {
685                         flist_dir = NULL;
686                         if (pop_dir(olddir) != 0) {
687                                 rprintf(FERROR,"pop_dir %s : %s\n",
688                                         dir,strerror(errno));
689                                 exit_cleanup(RERR_FILESELECT);
690                         }
691                 }
692         }
693
694         if (f != -1) {
695                 send_file_entry(NULL,f,0);
696         }
697
698         if (verbose && recurse && !am_server && f != -1)
699                 rprintf(FINFO,"done\n");
700         
701         clean_flist(flist, 0);
702         
703         /* now send the uid/gid list. This was introduced in protocol
704            version 15 */
705         if (f != -1 && remote_version >= 15) {
706                 send_uid_list(f);
707         }
708
709         /* if protocol version is >= 17 then send the io_error flag */
710         if (f != -1 && remote_version >= 17) {
711                 write_int(f, io_error);
712         }
713
714         if (f != -1) {
715                 io_end_buffering(f);
716                 stats.flist_size = stats.total_written - start_write;
717                 stats.num_files = flist->count;
718         }
719
720         if (verbose > 2)
721                 rprintf(FINFO,"send_file_list done\n");
722
723         return flist;
724 }
725
726
727 struct file_list *recv_file_list(int f)
728 {
729   struct file_list *flist;
730   unsigned char flags;
731   int64 start_read;
732   extern int list_only;
733
734   if (verbose && recurse && !am_server) {
735     rprintf(FINFO,"receiving file list ... ");
736     rflush(FINFO);
737   }
738
739   start_read = stats.total_read;
740
741   flist = (struct file_list *)malloc(sizeof(flist[0]));
742   if (!flist)
743     goto oom;
744
745   flist->count=0;
746   flist->malloced=1000;
747   flist->files = (struct file_struct **)malloc(sizeof(flist->files[0])*
748                                                flist->malloced);
749   if (!flist->files)
750     goto oom;
751
752
753   for (flags=read_byte(f); flags; flags=read_byte(f)) {
754     int i = flist->count;
755
756     if (i >= flist->malloced) {
757           if (flist->malloced < 1000)
758                   flist->malloced += 1000;
759           else
760                   flist->malloced *= 2;
761           flist->files =(struct file_struct **)realloc(flist->files,
762                                                        sizeof(flist->files[0])*
763                                                        flist->malloced);
764           if (!flist->files)
765                   goto oom;
766     }
767
768     receive_file_entry(&flist->files[i],flags,f);
769
770     if (S_ISREG(flist->files[i]->mode))
771             stats.total_size += flist->files[i]->length;
772
773     flist->count++;
774
775     if (verbose > 2)
776       rprintf(FINFO,"recv_file_name(%s)\n",f_name(flist->files[i]));
777   }
778
779
780   if (verbose > 2)
781     rprintf(FINFO,"received %d names\n",flist->count);
782
783   clean_flist(flist, relative_paths);
784
785   if (verbose && recurse && !am_server) {
786     rprintf(FINFO,"done\n");
787   }
788
789   /* now recv the uid/gid list. This was introduced in protocol version 15 */
790   if (f != -1 && remote_version >= 15) {
791           recv_uid_list(f, flist);
792   }
793
794   /* if protocol version is >= 17 then recv the io_error flag */
795   if (f != -1 && remote_version >= 17) {
796           io_error |= read_int(f);
797   }
798
799   if (list_only) {
800           int i;
801           for (i=0;i<flist->count;i++) {
802                   list_file_entry(flist->files[i]);
803           }
804   }
805
806
807   if (verbose > 2)
808     rprintf(FINFO,"recv_file_list done\n");
809
810   stats.flist_size = stats.total_read - start_read;
811   stats.num_files = flist->count;
812
813   return flist;
814
815 oom:
816     out_of_memory("recv_file_list");
817     return NULL; /* not reached */
818 }
819
820
821 int file_compare(struct file_struct **f1,struct file_struct **f2)
822 {
823         if (!(*f1)->basename && !(*f2)->basename) return 0;
824         if (!(*f1)->basename) return -1;
825         if (!(*f2)->basename) return 1;
826         if ((*f1)->dirname == (*f2)->dirname)
827                 return u_strcmp((*f1)->basename, (*f2)->basename);
828         return u_strcmp(f_name(*f1),f_name(*f2));
829 }
830
831
832 int flist_find(struct file_list *flist,struct file_struct *f)
833 {
834         int low=0,high=flist->count-1;
835
836         if (flist->count <= 0) return -1;
837
838         while (low != high) {
839                 int mid = (low+high)/2;
840                 int ret = file_compare(&flist->files[flist_up(flist, mid)],&f);
841                 if (ret == 0) return flist_up(flist, mid);
842                 if (ret > 0) {
843                         high=mid;
844                 } else {
845                         low=mid+1;
846                 }
847         }
848
849         if (file_compare(&flist->files[flist_up(flist,low)],&f) == 0)
850                 return flist_up(flist,low);
851         return -1;
852 }
853
854
855 /*
856  * free up one file
857  */
858 static void free_file(struct file_struct *file)
859 {
860         if (!file) return;
861         if (file->basename) free(file->basename);
862         if (file->link) free(file->link);
863         if (file->sum) free(file->sum);
864         memset((char *)file, 0, sizeof(*file));
865 }
866
867
868 /*
869  * free up all elements in a flist
870  */
871 void flist_free(struct file_list *flist)
872 {
873         int i;
874         for (i=1;i<flist->count;i++) {
875                 free_file(flist->files[i]);
876                 free(flist->files[i]);
877         }       
878         memset((char *)flist->files, 0, sizeof(flist->files[0])*flist->count);
879         free(flist->files);
880         memset((char *)flist, 0, sizeof(*flist));
881         free(flist);
882 }
883
884
885 /*
886  * This routine ensures we don't have any duplicate names in our file list.
887  * duplicate names can cause corruption because of the pipelining 
888  */
889 static void clean_flist(struct file_list *flist, int strip_root)
890 {
891         int i;
892
893         if (!flist || flist->count == 0) 
894                 return;
895   
896         qsort(flist->files,flist->count,
897               sizeof(flist->files[0]),
898               (int (*)())file_compare);
899
900         for (i=1;i<flist->count;i++) {
901                 if (flist->files[i]->basename &&
902                     flist->files[i-1]->basename &&
903                     strcmp(f_name(flist->files[i]),
904                            f_name(flist->files[i-1])) == 0) {
905                         if (verbose > 1 && !am_server)
906                                 rprintf(FINFO,"removing duplicate name %s from file list %d\n",
907                                         f_name(flist->files[i-1]),i-1);
908                         free_file(flist->files[i]);
909                 } 
910         }
911
912         if (strip_root) {
913                 /* we need to strip off the root directory in the case
914                    of relative paths, but this must be done _after_
915                    the sorting phase */
916                 for (i=0;i<flist->count;i++) {
917                         if (flist->files[i]->dirname &&
918                             flist->files[i]->dirname[0] == '/') {
919                                 memmove(&flist->files[i]->dirname[0],
920                                         &flist->files[i]->dirname[1],
921                                         strlen(flist->files[i]->dirname));
922                         }
923                         
924                         if (flist->files[i]->dirname && 
925                             !flist->files[i]->dirname[0]) {
926                                 flist->files[i]->dirname = NULL;
927                         }
928                 }
929         }
930
931
932         if (verbose <= 3) return;
933
934         for (i=0;i<flist->count;i++) {
935                 rprintf(FINFO,"[%d] i=%d %s %s mode=0%o len=%d\n",
936                         getpid(), i, 
937                         NS(flist->files[i]->dirname),
938                         NS(flist->files[i]->basename),
939                         flist->files[i]->mode,
940                         (int)flist->files[i]->length);
941         }
942 }
943
944
945 /*
946  * return the full filename of a flist entry
947  */
948 char *f_name(struct file_struct *f)
949 {
950         static char names[10][MAXPATHLEN];
951         static int n;
952         char *p = names[n];
953
954         if (!f || !f->basename) return NULL;
955
956         n = (n+1)%10;
957
958         if (f->dirname) {
959                 strlcpy(p, f->dirname, MAXPATHLEN);
960                 strlcat(p, "/", MAXPATHLEN);
961                 strlcat(p, f->basename, MAXPATHLEN);
962         } else {
963                 strlcpy(p, f->basename, MAXPATHLEN);
964         }
965
966         return p;
967 }
968