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