Merged in the security fixes from 2.5.7.
[rsync/rsync.git] / exclude.c
index 109ee8d..a459f29 100644 (file)
--- a/exclude.c
+++ b/exclude.c
@@ -1,78 +1,46 @@
-/* 
-   Copyright (C) Andrew Tridgell 1996
-   Copyright (C) Paul Mackerras 1996
-   
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-   
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-   
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+/* -*- c-file-style: "linux" -*-
+ *
+ * Copyright (C) 1996-2001 by Andrew Tridgell <tridge@samba.org>
+ * Copyright (C) 1996 by Paul Mackerras
+ * Copyright (C) 2002 by Martin Pool
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
 
 /* a lot of this stuff was originally derived from GNU tar, although
    it has now changed so much that it is hard to tell :) */
 
+/* include/exclude cluestick added by Martin Pool <mbp@samba.org> */
+
 #include "rsync.h"
 
 extern int verbose;
 
-static struct exclude_struct **exclude_list;
-
-/*
- * Optimization for special case when all included files are explicitly
- *   listed without wildcards in the "exclude" list followed by a "- *"
- *   to exclude the rest.
- * Contributed by Dave Dykstra <dwd@bell-labs.com>
- */
-static int only_included_files = 1;
-static struct exclude_struct *exclude_the_rest;
-
-int send_included_file_names(int f,struct file_list *flist)
-{
-       struct exclude_struct *ex, **ex_list;
-       int n;
-       char *p;
-
-       if (!only_included_files || (exclude_the_rest == NULL))
-               return 0;
-
-       if (verbose > 1) {
-               rprintf(FINFO,"(using include-only optimization) ");
-       }
-
-       /* set exclude_list to NULL temporarily so check_exclude */
-       /*   will always return true */
-       ex_list = exclude_list;
-       exclude_list = NULL;
-       for (n=0; (ex = ex_list[n]) != NULL; n++) {
-               if (ex == exclude_the_rest)
-                       break;
-               p = ex->pattern;
-               while (*p == '/') {
-                       /* skip the allowed beginning slashes */
-                       p++;
-               }
-               send_file_name(f,flist,p,0,0);
-       }
-       exclude_list = ex_list;
-       
-       return 1;
-}
+struct exclude_struct **exclude_list;
+struct exclude_struct **local_exclude_list;
+struct exclude_struct **server_exclude_list;
+char *exclude_path_prefix = NULL;
 
-/* build an exclude structure given a exclude pattern */
-static struct exclude_struct *make_exclude(char *pattern, int include)
+/** Build an exclude structure given a exclude pattern */
+static struct exclude_struct *make_exclude(const char *pattern, int include)
 {
        struct exclude_struct *ret;
+       char *cp;
+       int pat_len;
 
-       ret = (struct exclude_struct *)malloc(sizeof(*ret));
+       ret = new(struct exclude_struct);
        if (!ret) out_of_memory("make_exclude");
 
        memset(ret, 0, sizeof(*ret));
@@ -86,29 +54,37 @@ static struct exclude_struct *make_exclude(char *pattern, int include)
                ret->include = include;
        }
 
-       ret->pattern = strdup(pattern);
-
-       if (!ret->pattern) out_of_memory("make_exclude");
+       if (exclude_path_prefix)
+               ret->match_flags |= MATCHFLG_ABS_PATH;
+       if (exclude_path_prefix && *pattern == '/') {
+               ret->pattern = new_array(char,
+                       strlen(exclude_path_prefix) + strlen(pattern) + 1);
+               if (!ret->pattern) out_of_memory("make_exclude");
+               sprintf(ret->pattern, "%s%s", exclude_path_prefix, pattern);
+       }
+       else {
+               ret->pattern = strdup(pattern);
+               if (!ret->pattern) out_of_memory("make_exclude");
+       }
 
        if (strpbrk(pattern, "*[?")) {
-           if (!ret->include && (*pattern == '*') && (*(pattern+1) == '\0')) {
-                   exclude_the_rest = ret;
-           } else {
-                   only_included_files = 0;
-           }
-           ret->regular_exp = 1;
-       } else if (!ret->include) {
-               only_included_files = 0;
+               ret->match_flags |= MATCHFLG_WILD;
+               if (strstr(pattern, "**")) {
+                       ret->match_flags |= MATCHFLG_WILD2;
+                       /* If the pattern starts with **, note that. */
+                       if (*pattern == '*' && pattern[1] == '*')
+                               ret->match_flags |= MATCHFLG_WILD2_PREFIX;
+               }
        }
 
-       if (strlen(pattern) > 1 && pattern[strlen(pattern)-1] == '/') {
-               ret->pattern[strlen(pattern)-1] = 0;
+       pat_len = strlen(ret->pattern);
+       if (pat_len > 1 && ret->pattern[pat_len-1] == '/') {
+               ret->pattern[pat_len-1] = 0;
                ret->directory = 1;
        }
 
-       if (!strchr(ret->pattern,'/')) {
-               ret->local = 1;
-       }
+       for (cp = ret->pattern; (cp = strchr(cp, '/')) != NULL; cp++)
+               ret->slash_cnt++;
 
        return ret;
 }
@@ -120,135 +96,235 @@ static void free_exclude(struct exclude_struct *ex)
        free(ex);
 }
 
-static int check_one_exclude(char *name,struct exclude_struct *ex,
-                            STRUCT_STAT *st)
+
+void free_exclude_list(struct exclude_struct ***listp)
+{
+       struct exclude_struct **list = *listp;
+
+       if (verbose > 2)
+               rprintf(FINFO,"clearing exclude list\n");
+
+       if (!list)
+               return;
+
+       while (*list)
+               free_exclude(*list++);
+
+       free(*listp);
+       *listp = NULL;
+}
+
+static int check_one_exclude(char *name, struct exclude_struct *ex,
+                             int name_is_dir)
 {
        char *p;
-       int match_start=0;
+       int match_start = 0;
        char *pattern = ex->pattern;
 
-       if (ex->local && (p=strrchr(name,'/')))
-               name = p+1;
+       /* If the pattern does not have any slashes AND it does not have
+        * a "**" (which could match a slash), then we just match the
+        * name portion of the path. */
+       if (!ex->slash_cnt && !(ex->match_flags & MATCHFLG_WILD2)) {
+               if ((p = strrchr(name,'/')) != NULL)
+                       name = p+1;
+       }
+       else if ((ex->match_flags & MATCHFLG_ABS_PATH) && *name != '/') {
+               static char full_name[MAXPATHLEN];
+               extern char curr_dir[];
+               int plus = curr_dir[1] == '\0'? 1 : 0;
+               snprintf(full_name, sizeof full_name,
+                        "%s/%s", curr_dir+plus, name);
+               name = full_name;
+       }
 
        if (!name[0]) return 0;
 
-       if (ex->directory && !S_ISDIR(st->st_mode)) return 0;
+       if (ex->directory && !name_is_dir) return 0;
 
-       if (*pattern == '/' && *name != '/') {
+       if (*pattern == '/') {
                match_start = 1;
                pattern++;
+               if (*name == '/')
+                       name++;
        }
 
-       if (ex->regular_exp) {
-               if (fnmatch(pattern, name, 0) == 0)
+       if (ex->match_flags & MATCHFLG_WILD) {
+               /* A non-anchored match with an infix slash and no "**"
+                * needs to match the last slash_cnt+1 name elements. */
+               if (!match_start && ex->slash_cnt &&
+                   !(ex->match_flags & MATCHFLG_WILD2)) {
+                       int cnt = ex->slash_cnt + 1;
+                       for (p = name + strlen(name) - 1; p >= name; p--) {
+                               if (*p == '/' && !--cnt)
+                                       break;
+                       }
+                       name = p+1;
+               }
+               if (wildmatch(pattern, name))
+                       return 1;
+               if (ex->match_flags & MATCHFLG_WILD2_PREFIX) {
+                       /* If the **-prefixed pattern has a '/' as the next
+                        * character, then try to match the rest of the
+                        * pattern at the root. */
+                       if (pattern[2] == '/' && wildmatch(pattern+3, name))
+                               return 1;
+               }
+               else if (!match_start && ex->match_flags & MATCHFLG_WILD2) {
+                       /* A non-anchored match with an infix or trailing "**"
+                        * (but not a prefixed "**") needs to try matching
+                        * after every slash. */
+                       while ((name = strchr(name, '/')) != NULL) {
+                               name++;
+                               if (wildmatch(pattern, name))
+                                       return 1;
+                       }
+               }
+       } else if (match_start) {
+               if (strcmp(name,pattern) == 0)
                        return 1;
        } else {
                int l1 = strlen(name);
                int l2 = strlen(pattern);
-               if (l2 <= l1 && 
+               if (l2 <= l1 &&
                    strcmp(name+(l1-l2),pattern) == 0 &&
-                   (l1==l2 || (!match_start && name[l1-(l2+1)] == '/')))
+                   (l1==l2 || name[l1-(l2+1)] == '/')) {
                        return 1;
+               }
        }
 
        return 0;
 }
 
 
-int check_exclude(char *name,struct exclude_struct **local_exclude_list,
-                 STRUCT_STAT *st)
+static void report_exclude_result(char const *name,
+                                  struct exclude_struct const *ent,
+                                  int name_is_dir)
 {
-       int n;
+       /* If a trailing slash is present to match only directories,
+        * then it is stripped out by make_exclude.  So as a special
+        * case we add it back in here. */
+
+       if (verbose >= 2)
+               rprintf(FINFO, "%s %s %s because of pattern %s%s\n",
+                       ent->include ? "including" : "excluding",
+                       name_is_dir ? "directory" : "file",
+                       name, ent->pattern,
+                       ent->directory ? "/" : "");
+}
 
-       if (exclude_list) {
-               for (n=0; exclude_list[n]; n++)
-                       if (check_one_exclude(name,exclude_list[n],st))
-                               return !exclude_list[n]->include;
-       }
 
-       if (local_exclude_list) {
-               for (n=0; local_exclude_list[n]; n++)
-                       if (check_one_exclude(name,local_exclude_list[n],st))
-                               return !local_exclude_list[n]->include;
+/*
+ * Return true if file NAME is defined to be excluded by either
+ * LOCAL_EXCLUDE_LIST or the globals EXCLUDE_LIST.
+ */
+int check_exclude(struct exclude_struct **list, char *name, int name_is_dir)
+{
+       struct exclude_struct *ent;
+
+       while ((ent = *list++) != NULL) {
+               if (check_one_exclude(name, ent, name_is_dir)) {
+                       report_exclude_result(name, ent, name_is_dir);
+                       return !ent->include;
+               }
        }
 
        return 0;
 }
 
 
-void add_exclude_list(char *pattern,struct exclude_struct ***list, int include)
+void add_exclude(struct exclude_struct ***listp, const char *pattern, int include)
 {
-       int len=0;
-       if (list && *list)
-               for (; (*list)[len]; len++) ;
-
-       if (strcmp(pattern,"!") == 0) {
-               if (verbose > 2)
-                       rprintf(FINFO,"clearing exclude list\n");
-               while ((len)--) {
-                       free_exclude((*list)[len]);
-               }
-               free((*list));
-               *list = NULL;
-               only_included_files = 1;
-               exclude_the_rest = NULL;
-               return;
+       struct exclude_struct **list = *listp;
+       int len = 0;
+
+       if (*pattern == '!' && !pattern[1]) {
+           free_exclude_list(listp);
+           return;
        }
 
-       *list = (struct exclude_struct **)Realloc(*list,sizeof(struct exclude_struct *)*(len+2));
-       
-       if (!*list || !((*list)[len] = make_exclude(pattern, include)))
+       if (list)
+               for (; list[len]; len++) {}
+
+       list = *listp = realloc_array(list, struct exclude_struct *, len+2);
+
+       if (!list || !(list[len] = make_exclude(pattern, include)))
                out_of_memory("add_exclude");
-       
-       if (verbose > 2)
-               rprintf(FINFO,"add_exclude(%s)\n",pattern);
-       
-       (*list)[len+1] = NULL;
-}
 
-void add_exclude(char *pattern, int include)
-{
-       add_exclude_list(pattern,&exclude_list, include);
+       if (verbose > 2) {
+               rprintf(FINFO,"add_exclude(%s,%s)\n",pattern,
+                       include ? "include" : "exclude");
+       }
+
+       list[len+1] = NULL;
 }
 
-struct exclude_struct **make_exclude_list(char *fname,
-                                         struct exclude_struct **list1,
-                                         int fatal, int include)
+
+void add_exclude_file(struct exclude_struct ***listp, const char *fname,
+                     int fatal, int include)
 {
-       struct exclude_struct **list=list1;
-       FILE *f = fopen(fname,"r");
+       int fd;
        char line[MAXPATHLEN];
-       if (!f) {
+       char *eob = line + MAXPATHLEN - 1;
+       extern int eol_nulls;
+
+       if (!fname || !*fname)
+               return;
+
+       if (*fname != '-' || fname[1])
+               fd = open(fname, O_RDONLY|O_BINARY);
+       else
+               fd = 0;
+       if (fd < 0) {
                if (fatal) {
-                       rprintf(FERROR,"%s : %s\n",fname,strerror(errno));
+                       rsyserr(FERROR, errno,
+                               "failed to open %s file %s",
+                               include ? "include" : "exclude",
+                               fname);
                        exit_cleanup(RERR_FILEIO);
                }
-               return list;
+               return;
        }
 
-       while (fgets(line,MAXPATHLEN,f)) {
-               int l = strlen(line);
-               if (l && line[l-1] == '\n') l--;
-               line[l] = 0;
-               if (line[0]) add_exclude_list(line,&list,include);
+       while (1) {
+               char ch, *s = line;
+               int cnt;
+               while (1) {
+                       if ((cnt = read(fd, &ch, 1)) <= 0) {
+                               if (cnt < 0 && errno == EINTR)
+                                       continue;
+                               break;
+                       }
+                       if (eol_nulls? !ch : (ch == '\n' || ch == '\r'))
+                               break;
+                       if (s < eob)
+                               *s++ = ch;
+               }
+               *s = '\0';
+               if (*line && *line != ';' && *line != '#') {
+                       /* Skip lines starting with semicolon or pound.
+                        * It probably wouldn't cause any harm to not skip
+                        * them but there's no need to save them. */
+                       add_exclude(listp, line, include);
+               }
+               if (cnt <= 0)
+                       break;
        }
-       fclose(f);
-       return list;
-}
-
-
-void add_exclude_file(char *fname,int fatal,int include)
-{
-       if (!fname || !*fname) return;
-
-       exclude_list = make_exclude_list(fname,exclude_list,fatal,include);
+       close(fd);
 }
 
 
 void send_exclude_list(int f)
 {
        int i;
-       extern int remote_version;
+       extern int protocol_version;
+       extern int list_only, recurse;
+
+       /* This is a complete hack - blame Rusty.
+        *
+        * FIXME: This pattern shows up in the output of
+        * report_exclude_result(), which is not ideal. */
+       if (list_only && !recurse)
+               add_exclude(&exclude_list, "/*/*", ADD_EXCLUDE);
 
        if (!exclude_list) {
                write_int(f,0);
@@ -256,13 +332,16 @@ void send_exclude_list(int f)
        }
 
        for (i=0;exclude_list[i];i++) {
-               char *pattern = exclude_list[i]->pattern; 
                int l;
+               char pattern[MAXPATHLEN];
+
+               strlcpy(pattern,exclude_list[i]->pattern,sizeof(pattern));
+               if (exclude_list[i]->directory) strlcat(pattern,"/", sizeof(pattern));
 
                l = strlen(pattern);
                if (l == 0) continue;
                if (exclude_list[i]->include) {
-                       if (remote_version < 19) {
+                       if (protocol_version < 19) {
                                rprintf(FERROR,"remote rsync does not support include syntax - aborting\n");
                                exit_cleanup(RERR_UNSUPPORTED);
                        }
@@ -272,7 +351,7 @@ void send_exclude_list(int f)
                        write_int(f,l);
                }
                write_buf(f,pattern,l);
-       }    
+       }
 
        write_int(f,0);
 }
@@ -281,45 +360,83 @@ void send_exclude_list(int f)
 void recv_exclude_list(int f)
 {
        char line[MAXPATHLEN];
-       int l;
+       unsigned int l;
+
        while ((l=read_int(f))) {
                if (l >= MAXPATHLEN) overflow("recv_exclude_list");
                read_sbuf(f,line,l);
-               add_exclude(line,0);
+               add_exclude(&exclude_list, line, ADD_EXCLUDE);
        }
 }
 
-
-void add_exclude_line(char *p)
+/* Get the next include/exclude arg from the string. It works in a similar way
+** to strtok - initially an arg is sent over, from then on NULL. This
+** routine takes into account any +/- in the strings and does not
+** consider the space following it as a delimeter.
+*/
+char *get_exclude_tok(char *p)
 {
-       char *tok;
-       if (!p || !*p) return;
-       p = strdup(p);
-       if (!p) out_of_memory("add_exclude_line");
-       for (tok=strtok(p," "); tok; tok=strtok(NULL," "))
-               add_exclude(tok, 0);
-       free(p);
+       static char *s;
+       static int more;
+       char *t;
+
+       if (p) {
+               s=p;
+               if (*p)
+                       more=1;
+       }
+
+       if (!more)
+               return(NULL);
+
+       /* Skip over any initial spaces */
+       while (isspace(* (unsigned char *) s))
+               s++;
+
+       /* Are we at the end of the string? */
+       if (*s) {
+               /* remember the beginning of the token */
+               t=s;
+
+               /* Is this a '+' or '-' followed by a space (not whitespace)? */
+               if ((*s=='+' || *s=='-') && *(s+1)==' ')
+                       s+=2;
+
+               /* Skip to the next space or the end of the string */
+               while (!isspace(* (unsigned char *) s) && *s != '\0')
+                       s++;
+       } else {
+               t=NULL;
+       }
+
+       /* Have we reached the end of the string? */
+       if (*s)
+               *s++='\0';
+       else
+               more=0;
+       return(t);
 }
 
-void add_include_line(char *p)
+
+void add_exclude_line(struct exclude_struct ***listp,
+                     const char *line, int include)
 {
-       char *tok;
-       if (!p || !*p) return;
-       p = strdup(p);
-       if (!p) out_of_memory("add_include_line");
-       for (tok=strtok(p," "); tok; tok=strtok(NULL," "))
-               add_exclude(tok, 1);
+       char *tok, *p;
+       if (!line || !*line) return;
+       p = strdup(line);
+       if (!p) out_of_memory("add_exclude_line");
+       for (tok=get_exclude_tok(p); tok; tok=get_exclude_tok(NULL))
+               add_exclude(listp, tok, include);
        free(p);
 }
 
 
 static char *cvs_ignore_list[] = {
-  "RCS","SCCS","CVS","CVS.adm","RCSLOG","cvslog.*",
-  "tags","TAGS",".make.state",".nse_depinfo",
-  "*~", "#*", ".#*", ",*", "*.old", "*.bak", "*.BAK", "*.orig",
+  "RCS/", "SCCS/", "CVS/", ".svn/", "CVS.adm", "RCSLOG", "cvslog.*",
+  "tags", "TAGS", ".make.state", ".nse_depinfo",
+  "*~", "#*", ".#*", ", *", "*.old", "*.bak", "*.BAK", "*.orig",
   "*.rej", ".del-*", "*.a", "*.o", "*.obj", "*.so", "*.Z", "*.elc", "*.ln",
-  "core",NULL};
-
+  "core", NULL};
 
 
 void add_cvs_excludes(void)
@@ -327,14 +444,14 @@ void add_cvs_excludes(void)
        char fname[MAXPATHLEN];
        char *p;
        int i;
-  
+
        for (i=0; cvs_ignore_list[i]; i++)
-               add_exclude(cvs_ignore_list[i], 0);
+               add_exclude(&exclude_list, cvs_ignore_list[i], ADD_EXCLUDE);
 
        if ((p=getenv("HOME")) && strlen(p) < (MAXPATHLEN-12)) {
-               slprintf(fname,sizeof(fname), "%s/.cvsignore",p);
-               add_exclude_file(fname,0,0);
+               snprintf(fname,sizeof(fname), "%s/.cvsignore",p);
+               add_exclude_file(&exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
        }
 
-       add_exclude_line(getenv("CVSIGNORE"));
+       add_exclude_line(&exclude_list, getenv("CVSIGNORE"), ADD_EXCLUDE);
 }