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