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  * Copyright (C) 2002 by Martin Pool
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 /* a lot of this stuff was originally derived from GNU tar, although
  23    it has now changed so much that it is hard to tell :) */
  24
  25 /* include/exclude cluestick added by Martin Pool <mbp@samba.org> */
  26
  27 #include "rsync.h"
  28
  29 extern int verbose;
  30
  31 struct exclude_struct **exclude_list;
  32 struct exclude_struct **local_exclude_list;
  33 struct exclude_struct **server_exclude_list;
  34 char *exclude_path_prefix = NULL;
  35
  36 /** Build an exclude structure given a exclude pattern */
  37 static struct exclude_struct *make_exclude(const char *pattern, int include)
  38 {
  39         struct exclude_struct *ret;
  40         char *cp;
  41         int pat_len;
  42
  43         ret = new(struct exclude_struct);
  44         if (!ret) out_of_memory("make_exclude");
  45
  46         memset(ret, 0, sizeof(*ret));
  47
  48         if (strncmp(pattern,"- ",2) == 0) {
  49                 pattern += 2;
  50         } else if (strncmp(pattern,"+ ",2) == 0) {
  51                 ret->include = 1;
  52                 pattern += 2;
  53         } else {
  54                 ret->include = include;
  55         }
  56
  57         if (exclude_path_prefix)
  58                 ret->match_flags |= MATCHFLG_ABS_PATH;
  59         if (exclude_path_prefix && *pattern == '/') {
  60                 ret->pattern = new_array(char,
  61                         strlen(exclude_path_prefix) + strlen(pattern) + 1);
  62                 if (!ret->pattern) out_of_memory("make_exclude");
  63                 sprintf(ret->pattern, "%s%s", exclude_path_prefix, pattern);
  64         }
  65         else {
  66                 ret->pattern = strdup(pattern);
  67                 if (!ret->pattern) out_of_memory("make_exclude");
  68         }
  69
  70         if (strpbrk(pattern, "*[?")) {
  71                 ret->match_flags |= MATCHFLG_WILD;
  72                 if (strstr(pattern, "**")) {
  73                         ret->match_flags |= MATCHFLG_WILD2;
  74                         /* If the pattern starts with **, note that. */
  75                         if (*pattern == '*' && pattern[1] == '*')
  76                                 ret->match_flags |= MATCHFLG_WILD2_PREFIX;
  77                 }
  78         }
  79
  80         pat_len = strlen(ret->pattern);
  81         if (pat_len > 1 && ret->pattern[pat_len-1] == '/') {
  82                 ret->pattern[pat_len-1] = 0;
  83                 ret->directory = 1;
  84         }
  85
  86         for (cp = ret->pattern; (cp = strchr(cp, '/')) != NULL; cp++)
  87                 ret->slash_cnt++;
  88
  89         return ret;
  90 }
  91
  92 static void free_exclude(struct exclude_struct *ex)
  93 {
  94         free(ex->pattern);
  95         memset(ex,0,sizeof(*ex));
  96         free(ex);
  97 }
  98
  99
 100 void free_exclude_list(struct exclude_struct ***listp)
 101 {
 102         struct exclude_struct **list = *listp;
 103
 104         if (verbose > 2)
 105                 rprintf(FINFO,"clearing exclude list\n");
 106
 107         if (!list)
 108                 return;
 109
 110         while (*list)
 111                 free_exclude(*list++);
 112
 113         free(*listp);
 114         *listp = NULL;
 115 }
 116
 117 static int check_one_exclude(char *name, struct exclude_struct *ex,
 118                              int name_is_dir)
 119 {
 120         char *p;
 121         int match_start = 0;
 122         char *pattern = ex->pattern;
 123
 124         /* If the pattern does not have any slashes AND it does not have
 125          * a "**" (which could match a slash), then we just match the
 126          * name portion of the path. */
 127         if (!ex->slash_cnt && !(ex->match_flags & MATCHFLG_WILD2)) {
 128                 if ((p = strrchr(name,'/')) != NULL)
 129                         name = p+1;
 130         }
 131         else if ((ex->match_flags & MATCHFLG_ABS_PATH) && *name != '/') {
 132                 static char full_name[MAXPATHLEN];
 133                 extern char curr_dir[];
 134                 int plus = curr_dir[1] == '\0'? 1 : 0;
 135                 snprintf(full_name, sizeof full_name,
 136                          "%s/%s", curr_dir+plus, name);
 137                 name = full_name;
 138         }
 139
 140         if (!name[0]) return 0;
 141
 142         if (ex->directory && !name_is_dir) return 0;
 143
 144         if (*pattern == '/') {
 145                 match_start = 1;
 146                 pattern++;
 147                 if (*name == '/')
 148                         name++;
 149         }
 150
 151         if (ex->match_flags & MATCHFLG_WILD) {
 152                 /* A non-anchored match with an infix slash and no "**"
 153                  * needs to match the last slash_cnt+1 name elements. */
 154                 if (!match_start && ex->slash_cnt &&
 155                     !(ex->match_flags & MATCHFLG_WILD2)) {
 156                         int cnt = ex->slash_cnt + 1;
 157                         for (p = name + strlen(name) - 1; p >= name; p--) {
 158                                 if (*p == '/' && !--cnt)
 159                                         break;
 160                         }
 161                         name = p+1;
 162                 }
 163                 if (wildmatch(pattern, name))
 164                         return 1;
 165                 if (ex->match_flags & MATCHFLG_WILD2_PREFIX) {
 166                         /* If the **-prefixed pattern has a '/' as the next
 167                          * character, then try to match the rest of the
 168                          * pattern at the root. */
 169                         if (pattern[2] == '/' && wildmatch(pattern+3, name))
 170                                 return 1;
 171                 }
 172                 else if (!match_start && ex->match_flags & MATCHFLG_WILD2) {
 173                         /* A non-anchored match with an infix or trailing "**"
 174                          * (but not a prefixed "**") needs to try matching
 175                          * after every slash. */
 176                         while ((name = strchr(name, '/')) != NULL) {
 177                                 name++;
 178                                 if (wildmatch(pattern, name))
 179                                         return 1;
 180                         }
 181                 }
 182         } else if (match_start) {
 183                 if (strcmp(name,pattern) == 0)
 184                         return 1;
 185         } else {
 186                 int l1 = strlen(name);
 187                 int l2 = strlen(pattern);
 188                 if (l2 <= l1 &&
 189                     strcmp(name+(l1-l2),pattern) == 0 &&
 190                     (l1==l2 || name[l1-(l2+1)] == '/')) {
 191                         return 1;
 192                 }
 193         }
 194
 195         return 0;
 196 }
 197
 198
 199 static void report_exclude_result(char const *name,
 200                                   struct exclude_struct const *ent,
 201                                   int name_is_dir)
 202 {
 203         /* If a trailing slash is present to match only directories,
 204          * then it is stripped out by make_exclude.  So as a special
 205          * case we add it back in here. */
 206
 207         if (verbose >= 2)
 208                 rprintf(FINFO, "%s %s %s because of pattern %s%s\n",
 209                         ent->include ? "including" : "excluding",
 210                         name_is_dir ? "directory" : "file",
 211                         name, ent->pattern,
 212                         ent->directory ? "/" : "");
 213 }
 214
 215
 216 /*
 217  * Return true if file NAME is defined to be excluded by either
 218  * LOCAL_EXCLUDE_LIST or the globals EXCLUDE_LIST.
 219  */
 220 int check_exclude(struct exclude_struct **list, char *name, int name_is_dir)
 221 {
 222         struct exclude_struct *ent;
 223
 224         while ((ent = *list++) != NULL) {
 225                 if (check_one_exclude(name, ent, name_is_dir)) {
 226                         report_exclude_result(name, ent, name_is_dir);
 227                         return !ent->include;
 228                 }
 229         }
 230
 231         return 0;
 232 }
 233
 234
 235 void add_exclude(struct exclude_struct ***listp, const char *pattern, int include)
 236 {
 237         struct exclude_struct **list = *listp;
 238         int len = 0;
 239
 240         if (*pattern == '!' && !pattern[1]) {
 241             free_exclude_list(listp);
 242             return;
 243         }
 244
 245         if (list)
 246                 for (; list[len]; len++) {}
 247
 248         list = *listp = realloc_array(list, struct exclude_struct *, len+2);
 249
 250         if (!list || !(list[len] = make_exclude(pattern, include)))
 251                 out_of_memory("add_exclude");
 252
 253         if (verbose > 2) {
 254                 rprintf(FINFO,"add_exclude(%s,%s)\n",pattern,
 255                         include ? "include" : "exclude");
 256         }
 257
 258         list[len+1] = NULL;
 259 }
 260
 261
 262 void add_exclude_file(struct exclude_struct ***listp, const char *fname,
 263                       int fatal, int include)
 264 {
 265         int fd;
 266         char line[MAXPATHLEN];
 267         char *eob = line + MAXPATHLEN - 1;
 268         extern int eol_nulls;
 269
 270         if (!fname || !*fname)
 271                 return;
 272
 273         if (*fname != '-' || fname[1])
 274                 fd = open(fname, O_RDONLY|O_BINARY);
 275         else
 276                 fd = 0;
 277         if (fd < 0) {
 278                 if (fatal) {
 279                         rsyserr(FERROR, errno,
 280                                 "failed to open %s file %s",
 281                                 include ? "include" : "exclude",
 282                                 fname);
 283                         exit_cleanup(RERR_FILEIO);
 284                 }
 285                 return;
 286         }
 287
 288         while (1) {
 289                 char ch, *s = line;
 290                 int cnt;
 291                 while (1) {
 292                         if ((cnt = read(fd, &ch, 1)) <= 0) {
 293                                 if (cnt < 0 && errno == EINTR)
 294                                         continue;
 295                                 break;
 296                         }
 297                         if (eol_nulls? !ch : (ch == '\n' || ch == '\r'))
 298                                 break;
 299                         if (s < eob)
 300                                 *s++ = ch;
 301                 }
 302                 *s = '\0';
 303                 if (*line && *line != ';' && *line != '#') {
 304                         /* Skip lines starting with semicolon or pound.
 305                          * It probably wouldn't cause any harm to not skip
 306                          * them but there's no need to save them. */
 307                         add_exclude(listp, line, include);
 308                 }
 309                 if (cnt <= 0)
 310                         break;
 311         }
 312         close(fd);
 313 }
 314
 315
 316 void send_exclude_list(int f)
 317 {
 318         int i;
 319         extern int protocol_version;
 320         extern int list_only, recurse;
 321
 322         /* This is a complete hack - blame Rusty.
 323          *
 324          * FIXME: This pattern shows up in the output of
 325          * report_exclude_result(), which is not ideal. */
 326         if (list_only && !recurse)
 327                 add_exclude(&exclude_list, "/*/*", ADD_EXCLUDE);
 328
 329         if (!exclude_list) {
 330                 write_int(f,0);
 331                 return;
 332         }
 333
 334         for (i=0;exclude_list[i];i++) {
 335                 int l;
 336                 char pattern[MAXPATHLEN];
 337
 338                 strlcpy(pattern,exclude_list[i]->pattern,sizeof(pattern));
 339                 if (exclude_list[i]->directory) strlcat(pattern,"/", sizeof(pattern));
 340
 341                 l = strlen(pattern);
 342                 if (l == 0) continue;
 343                 if (exclude_list[i]->include) {
 344                         if (protocol_version < 19) {
 345                                 rprintf(FERROR,"remote rsync does not support include syntax - aborting\n");
 346                                 exit_cleanup(RERR_UNSUPPORTED);
 347                         }
 348                         write_int(f,l+2);
 349                         write_buf(f,"+ ",2);
 350                 } else {
 351                         write_int(f,l);
 352                 }
 353                 write_buf(f,pattern,l);
 354         }
 355
 356         write_int(f,0);
 357 }
 358
 359
 360 void recv_exclude_list(int f)
 361 {
 362         char line[MAXPATHLEN];
 363         unsigned int l;
 364
 365         while ((l=read_int(f))) {
 366                 if (l >= MAXPATHLEN) overflow("recv_exclude_list");
 367                 read_sbuf(f,line,l);
 368                 add_exclude(&exclude_list, line, ADD_EXCLUDE);
 369         }
 370 }
 371
 372 /* Get the next include/exclude arg from the string. It works in a similar way
 373 ** to strtok - initially an arg is sent over, from then on NULL. This
 374 ** routine takes into account any +/- in the strings and does not
 375 ** consider the space following it as a delimeter.
 376 */
 377 char *get_exclude_tok(char *p)
 378 {
 379         static char *s;
 380         static int more;
 381         char *t;
 382
 383         if (p) {
 384                 s=p;
 385                 if (*p)
 386                         more=1;
 387         }
 388
 389         if (!more)
 390                 return(NULL);
 391
 392         /* Skip over any initial spaces */
 393         while (isspace(* (unsigned char *) s))
 394                 s++;
 395
 396         /* Are we at the end of the string? */
 397         if (*s) {
 398                 /* remember the beginning of the token */
 399                 t=s;
 400
 401                 /* Is this a '+' or '-' followed by a space (not whitespace)? */
 402                 if ((*s=='+' || *s=='-') && *(s+1)==' ')
 403                         s+=2;
 404
 405                 /* Skip to the next space or the end of the string */
 406                 while (!isspace(* (unsigned char *) s) && *s != '\0')
 407                         s++;
 408         } else {
 409                 t=NULL;
 410         }
 411
 412         /* Have we reached the end of the string? */
 413         if (*s)
 414                 *s++='\0';
 415         else
 416                 more=0;
 417         return(t);
 418 }
 419
 420
 421 void add_exclude_line(struct exclude_struct ***listp,
 422                       const char *line, int include)
 423 {
 424         char *tok, *p;
 425         if (!line || !*line) return;
 426         p = strdup(line);
 427         if (!p) out_of_memory("add_exclude_line");
 428         for (tok=get_exclude_tok(p); tok; tok=get_exclude_tok(NULL))
 429                 add_exclude(listp, tok, include);
 430         free(p);
 431 }
 432
 433
 434 static char *cvs_ignore_list[] = {
 435   "RCS/", "SCCS/", "CVS/", ".svn/", "CVS.adm", "RCSLOG", "cvslog.*",
 436   "tags", "TAGS", ".make.state", ".nse_depinfo",
 437   "*~", "#*", ".#*", ", *", "*.old", "*.bak", "*.BAK", "*.orig",
 438   "*.rej", ".del-*", "*.a", "*.o", "*.obj", "*.so", "*.Z", "*.elc", "*.ln",
 439   "core", NULL};
 440
 441
 442 void add_cvs_excludes(void)
 443 {
 444         char fname[MAXPATHLEN];
 445         char *p;
 446         int i;
 447
 448         for (i=0; cvs_ignore_list[i]; i++)
 449                 add_exclude(&exclude_list, cvs_ignore_list[i], ADD_EXCLUDE);
 450
 451         if ((p=getenv("HOME")) && strlen(p) < (MAXPATHLEN-12)) {
 452                 snprintf(fname,sizeof(fname), "%s/.cvsignore",p);
 453                 add_exclude_file(&exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 454         }
 455
 456         add_exclude_line(&exclude_list, getenv("CVSIGNORE"), ADD_EXCLUDE);
 457 }