exclude.c

   1 /* -*- c-file-style: "linux" -*-
   2
   3    Copyright (C) 1996-2001 by Andrew Tridgell <tridge@samba.org>
   4    Copyright (C) 1996 by Paul Mackerras
   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 /* a lot of this stuff was originally derived from GNU tar, although
  22    it has now changed so much that it is hard to tell :) */
  23
  24 /* include/exclude cluestick added by Martin Pool <mbp@samba.org> */
  25
  26 #include "rsync.h"
  27
  28 extern int verbose;
  29 extern int delete_mode;
  30
  31 static struct exclude_struct **exclude_list;
  32
  33 /* build an exclude structure given a exclude pattern */
  34 static struct exclude_struct *make_exclude(const char *pattern, int include)
  35 {
  36         struct exclude_struct *ret;
  37
  38         ret = (struct exclude_struct *)malloc(sizeof(*ret));
  39         if (!ret) out_of_memory("make_exclude");
  40
  41         memset(ret, 0, sizeof(*ret));
  42
  43         if (strncmp(pattern,"- ",2) == 0) {
  44                 pattern += 2;
  45         } else if (strncmp(pattern,"+ ",2) == 0) {
  46                 ret->include = 1;
  47                 pattern += 2;
  48         } else {
  49                 ret->include = include;
  50         }
  51
  52         ret->pattern = strdup(pattern);
  53
  54         if (!ret->pattern) out_of_memory("make_exclude");
  55
  56         if (strpbrk(pattern, "*[?")) {
  57             ret->regular_exp = 1;
  58             ret->fnmatch_flags = FNM_PATHNAME;
  59             if (strstr(pattern, "**")) {
  60                     static int tested;
  61                     if (!tested) {
  62                             tested = 1;
  63                             if (fnmatch("a/b/*", "a/b/c/d", FNM_PATHNAME)==0) {
  64                                     rprintf(FERROR,"WARNING: fnmatch FNM_PATHNAME is broken on your system\n");
  65                             }
  66                     }
  67                     ret->fnmatch_flags = 0;
  68             }
  69         }
  70
  71         if (strlen(pattern) > 1 && pattern[strlen(pattern)-1] == '/') {
  72                 ret->pattern[strlen(pattern)-1] = 0;
  73                 ret->directory = 1;
  74         }
  75
  76         if (!strchr(ret->pattern,'/')) {
  77                 ret->local = 1;
  78         }
  79
  80         return ret;
  81 }
  82
  83 static void free_exclude(struct exclude_struct *ex)
  84 {
  85         free(ex->pattern);
  86         memset(ex,0,sizeof(*ex));
  87         free(ex);
  88 }
  89
  90 static int check_one_exclude(char *name, struct exclude_struct *ex,
  91                              STRUCT_STAT *st)
  92 {
  93         char *p;
  94         int match_start=0;
  95         char *pattern = ex->pattern;
  96
  97         if (ex->local && (p=strrchr(name,'/')))
  98                 name = p+1;
  99
 100         if (!name[0]) return 0;
 101
 102         if (ex->directory && !S_ISDIR(st->st_mode)) return 0;
 103
 104         if (*pattern == '/' && *name != '/') {
 105                 match_start = 1;
 106                 pattern++;
 107         }
 108
 109         if (ex->regular_exp) {
 110                 if (fnmatch(pattern, name, ex->fnmatch_flags) == 0) {
 111                         return 1;
 112                 }
 113         } else {
 114                 int l1 = strlen(name);
 115                 int l2 = strlen(pattern);
 116                 if (l2 <= l1 &&
 117                     strcmp(name+(l1-l2),pattern) == 0 &&
 118                     (l1==l2 || (!match_start && name[l1-(l2+1)] == '/'))) {
 119                         return 1;
 120                 }
 121         }
 122
 123         return 0;
 124 }
 125
 126
 127 static void report_exclude_result(char const *name,
 128                                   struct exclude_struct const *ent,
 129                                   STRUCT_STAT const *st)
 130 {
 131         /* If a trailing slash is present to match only directories,
 132          * then it is stripped out by make_exclude.  So as a special
 133          * case we add it back in here. */
 134
 135         if (verbose >= 2)
 136                 rprintf(FINFO, "%s %s %s because of pattern %s%s\n",
 137                         ent->include ? "including" : "excluding",
 138                         S_ISDIR(st->st_mode) ? "directory" : "file",
 139                         name, ent->pattern,
 140                         ent->directory ? "/" : "");
 141 }
 142
 143
 144 /*
 145  * Return true if file NAME is defined to be excluded by either
 146  * LOCAL_EXCLUDE_LIST or the globals EXCLUDE_LIST.
 147  */
 148 int check_exclude(char *name, struct exclude_struct **local_exclude_list,
 149                   STRUCT_STAT *st)
 150 {
 151         int n;
 152         struct exclude_struct *ent;
 153
 154         if (name && (name[0] == '.') && !name[1])
 155                 /* never exclude '.', even if somebody does --exclude '*' */
 156                 return 0;
 157
 158         if (exclude_list) {
 159                 for (n=0; exclude_list[n]; n++) {
 160                         ent = exclude_list[n];
 161                         if (check_one_exclude(name, ent, st)) {
 162                                 report_exclude_result(name, ent, st);
 163                                 return !ent->include;
 164                         }
 165                 }
 166         }
 167
 168         if (local_exclude_list) {
 169                 for (n=0; local_exclude_list[n]; n++) {
 170                         ent = local_exclude_list[n];
 171                         if (check_one_exclude(name, ent, st)) {
 172                                 report_exclude_result(name, ent, st);
 173                                 return !ent->include;
 174                         }
 175                 }
 176         }
 177
 178         return 0;
 179 }
 180
 181
 182 void add_exclude_list(const char *pattern, struct exclude_struct ***list, int include)
 183 {
 184         int len=0;
 185         if (list && *list)
 186                 for (; (*list)[len]; len++) ;
 187
 188         if (strcmp(pattern,"!") == 0) {
 189                 if (verbose > 2)
 190                         rprintf(FINFO,"clearing exclude list\n");
 191                 while ((len)--) {
 192                         free_exclude((*list)[len]);
 193                 }
 194                 free((*list));
 195                 *list = NULL;
 196                 return;
 197         }
 198
 199         *list = (struct exclude_struct **)Realloc(*list,sizeof(struct exclude_struct *)*(len+2));
 200
 201         if (!*list || !((*list)[len] = make_exclude(pattern, include)))
 202                 out_of_memory("add_exclude");
 203
 204         if (verbose > 2)
 205                 rprintf(FINFO,"add_exclude(%s)\n",pattern);
 206
 207         (*list)[len+1] = NULL;
 208 }
 209
 210 void add_exclude(const char *pattern, int include)
 211 {
 212         add_exclude_list(pattern,&exclude_list, include);
 213 }
 214
 215 struct exclude_struct **make_exclude_list(const char *fname,
 216                                           struct exclude_struct **list1,
 217                                           int fatal, int include)
 218 {
 219         struct exclude_struct **list=list1;
 220         FILE *f = fopen(fname,"r");
 221         char line[MAXPATHLEN];
 222         if (!f) {
 223                 if (fatal) {
 224                         rsyserr(FERROR, errno,
 225                                 "failed to open %s file %s",
 226                                 include ? "include" : "exclude",
 227                                 fname);
 228                         exit_cleanup(RERR_FILEIO);
 229                 }
 230                 return list;
 231         }
 232
 233         while (fgets(line,MAXPATHLEN,f)) {
 234                 int l = strlen(line);
 235                 if (l && line[l-1] == '\n') l--;
 236                 line[l] = 0;
 237                 if (line[0] && (line[0] != ';') && (line[0] != '#')) {
 238                         /* Skip lines starting with semicolon or pound.
 239                            It probably wouldn't cause any harm to not skip
 240                              them but there's no need to save them. */
 241                         add_exclude_list(line,&list,include);
 242                 }
 243         }
 244         fclose(f);
 245         return list;
 246 }
 247
 248
 249 void add_exclude_file(const char *fname, int fatal, int include)
 250 {
 251         if (!fname || !*fname) return;
 252
 253         exclude_list = make_exclude_list(fname,exclude_list,fatal,include);
 254 }
 255
 256
 257 void send_exclude_list(int f)
 258 {
 259         int i;
 260         extern int remote_version;
 261         extern int list_only, recurse;
 262
 263         /* this is a complete hack - blame Rusty */
 264         if (list_only && !recurse) {
 265                 add_exclude("/*/*", 0);
 266         }
 267
 268         if (!exclude_list) {
 269                 write_int(f,0);
 270                 return;
 271         }
 272
 273         for (i=0;exclude_list[i];i++) {
 274                 int l;
 275                 char pattern[MAXPATHLEN];
 276
 277                 strlcpy(pattern,exclude_list[i]->pattern,sizeof(pattern));
 278                 if (exclude_list[i]->directory) strlcat(pattern,"/", sizeof(pattern));
 279
 280                 l = strlen(pattern);
 281                 if (l == 0) continue;
 282                 if (exclude_list[i]->include) {
 283                         if (remote_version < 19) {
 284                                 rprintf(FERROR,"remote rsync does not support include syntax - aborting\n");
 285                                 exit_cleanup(RERR_UNSUPPORTED);
 286                         }
 287                         write_int(f,l+2);
 288                         write_buf(f,"+ ",2);
 289                 } else {
 290                         write_int(f,l);
 291                 }
 292                 write_buf(f,pattern,l);
 293         }
 294
 295         write_int(f,0);
 296 }
 297
 298
 299 void recv_exclude_list(int f)
 300 {
 301         char line[MAXPATHLEN];
 302         int l;
 303         while ((l=read_int(f))) {
 304                 if (l >= MAXPATHLEN) overflow("recv_exclude_list");
 305                 read_sbuf(f,line,l);
 306                 add_exclude(line,0);
 307         }
 308 }
 309
 310 /* Get the next include/exclude arg from the string. It works in a similar way
 311 ** to strtok - initially an arg is sent over, from then on NULL. This
 312 ** routine takes into account any +/- in the strings and does not
 313 ** consider the space following it as a delimeter.
 314 */
 315 char *get_exclude_tok(char *p)
 316 {
 317         static char *s;
 318         static int more;
 319         char *t;
 320
 321         if (p) {
 322                 s=p;
 323                 if (*p)
 324                         more=1;
 325         }
 326
 327         if (!more)
 328                 return(NULL);
 329
 330         /* Skip over any initial spaces */
 331         while(isspace(*s))
 332                 s++;
 333
 334         /* Are we at the end of the string? */
 335         if (*s) {
 336                 /* remember the beginning of the token */
 337                 t=s;
 338
 339                 /* Is this a '+' or '-' followed by a space (not whitespace)? */
 340                 if ((*s=='+' || *s=='-') && *(s+1)==' ')
 341                         s+=2;
 342
 343                 /* Skip to the next space or the end of the string */
 344                 while(!isspace(*s) && *s!='\0')
 345                         s++;
 346         } else {
 347                 t=NULL;
 348         }
 349
 350         /* Have we reached the end of the string? */
 351         if (*s)
 352                 *s++='\0';
 353         else
 354                 more=0;
 355         return(t);
 356 }
 357
 358
 359 void add_exclude_line(char *p)
 360 {
 361         char *tok;
 362         if (!p || !*p) return;
 363         p = strdup(p);
 364         if (!p) out_of_memory("add_exclude_line");
 365         for (tok=get_exclude_tok(p); tok; tok=get_exclude_tok(NULL))
 366                 add_exclude(tok, 0);
 367         free(p);
 368 }
 369
 370 void add_include_line(char *p)
 371 {
 372         char *tok;
 373         if (!p || !*p) return;
 374         p = strdup(p);
 375         if (!p) out_of_memory("add_include_line");
 376         for (tok=get_exclude_tok(p); tok; tok=get_exclude_tok(NULL))
 377                 add_exclude(tok, 1);
 378         free(p);
 379 }
 380
 381
 382 static char *cvs_ignore_list[] = {
 383   "RCS","SCCS","CVS","CVS.adm","RCSLOG","cvslog.*",
 384   "tags","TAGS",".make.state",".nse_depinfo",
 385   "*~", "#*", ".#*", ",*", "*.old", "*.bak", "*.BAK", "*.orig",
 386   "*.rej", ".del-*", "*.a", "*.o", "*.obj", "*.so", "*.Z", "*.elc", "*.ln",
 387   "core",NULL};
 388
 389
 390
 391 void add_cvs_excludes(void)
 392 {
 393         char fname[MAXPATHLEN];
 394         char *p;
 395         int i;
 396
 397         for (i=0; cvs_ignore_list[i]; i++)
 398                 add_exclude(cvs_ignore_list[i], 0);
 399
 400         if ((p=getenv("HOME")) && strlen(p) < (MAXPATHLEN-12)) {
 401                 snprintf(fname,sizeof(fname), "%s/.cvsignore",p);
 402                 add_exclude_file(fname,0,0);
 403         }
 404
 405         add_exclude_line(getenv("CVSIGNORE"));
 406 }