X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/8d249b635c57014aa96aa257bfe0221b43dff7d2..314a74d73101cdb9402ee21999187173456085dc:/rsync.c

diff --git a/rsync.c b/rsync.c
index 230d11f3..cfee2d03 100644
--- a/rsync.c
+++ b/rsync.c
@@ -1,17 +1,17 @@
-/* 
+/*
    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.
@@ -30,7 +30,6 @@ extern int preserve_uid;
 extern int preserve_gid;
 extern int preserve_perms;
 extern int make_backups;
-extern char *backup_suffix;
 
 
 /*
@@ -44,8 +43,8 @@ void free_sums(struct sum_struct *s)
 
 
 /*
- * delete a file or directory. If force_delet is set then delete 
- * recursively 
+ * delete a file or directory. If force_delete is set then delete
+ * recursively
  */
 int delete_file(char *fname)
 {
@@ -57,125 +56,175 @@ int delete_file(char *fname)
 	int ret;
 	extern int recurse;
 
-	if (do_unlink(fname) == 0 || errno == ENOENT) return 0;
-
 #if SUPPORT_LINKS
 	ret = do_lstat(fname, &st);
 #else
 	ret = do_stat(fname, &st);
 #endif
 	if (ret) {
-		rprintf(FERROR,"stat(%s) : %s\n", fname, strerror(errno));
 		return -1;
 	}
 
 	if (!S_ISDIR(st.st_mode)) {
-		rprintf(FERROR,"unlink(%s) : %s\n", fname, strerror(errno));
+		if (robust_unlink(fname) == 0 || errno == ENOENT) return 0;
+		rprintf(FERROR, "delete_file: unlink %s failed: %s\n",
+			full_fname(fname), strerror(errno));
 		return -1;
 	}
 
 	if (do_rmdir(fname) == 0 || errno == ENOENT) return 0;
-	if (!force_delete || !recurse || 
+	if (!force_delete || !recurse ||
 	    (errno != ENOTEMPTY && errno != EEXIST)) {
-		rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
+		rprintf(FERROR, "delete_file: rmdir %s failed: %s\n",
+			full_fname(fname), strerror(errno));
 		return -1;
 	}
 
 	/* now we do a recsursive delete on the directory ... */
 	d = opendir(fname);
 	if (!d) {
-		rprintf(FERROR,"opendir(%s): %s\n",
-			fname,strerror(errno));
+		rprintf(FERROR, "delete_file: opendir %s failed: %s\n",
+			full_fname(fname), strerror(errno));
 		return -1;
 	}
 
-	for (di=readdir(d); di; di=readdir(d)) {
+	for (errno = 0, di = readdir(d); di; errno = 0, di = readdir(d)) {
 		char *dname = d_name(di);
-		if (strcmp(dname,".")==0 ||
-		    strcmp(dname,"..")==0)
+		if (strcmp(dname,".") == 0
+		    || strcmp(dname,"..") == 0)
 			continue;
-		slprintf(buf, sizeof(buf)-1, "%s/%s", fname, dname);
+		snprintf(buf, sizeof(buf), "%s/%s", fname, dname);
 		if (verbose > 0)
 			rprintf(FINFO,"deleting %s\n", buf);
 		if (delete_file(buf) != 0) {
 			closedir(d);
 			return -1;
 		}
-	}	
+	}
+	if (errno) {
+		rprintf(FERROR, "delete_file: readdir %s failed: %s\n",
+			full_fname(fname), strerror(errno));
+		closedir(d);
+		return -1;
+	}
 
 	closedir(d);
-	
+
 	if (do_rmdir(fname) != 0) {
-		rprintf(FERROR,"rmdir(%s) : %s\n", fname, strerror(errno));
+		rprintf(FERROR, "delete_file: rmdir %s failed: %s\n",
+			full_fname(fname), strerror(errno));
 		return -1;
 	}
 
 	return 0;
 }
 
+static int is_in_group(gid_t gid)
+{
+#ifdef GETGROUPS_T
+	static gid_t last_in = (gid_t) -2, last_out;
+	static int ngroups = -2;
+	static GETGROUPS_T *gidset;
+	int n;
+
+	if (gid == last_in)
+		return last_out;
+	if (ngroups < -1) {
+		/* treat failure (-1) as if not member of any group */
+		ngroups = getgroups(0, 0);
+		if (ngroups > 0) {
+			gidset = new_array(GETGROUPS_T, ngroups);
+			ngroups = getgroups(ngroups, gidset);
+		}
+	}
+
+	last_in = gid;
+	last_out = 0;
+	for (n = 0; n < ngroups; n++) {
+		if (gidset[n] == gid) {
+			last_out = 1;
+			break;
+		}
+	}
+	return last_out;
+
+#else
+	return 0;
+#endif
+}
 
 int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
-	      int report)
+		int report)
 {
 	int updated = 0;
 	STRUCT_STAT st2;
-	extern int am_daemon;
+	int change_uid, change_gid;
 
 	if (dry_run) return 0;
 
 	if (!st) {
 		if (link_stat(fname,&st2) != 0) {
-			rprintf(FERROR,"stat %s : %s\n",fname,strerror(errno));
+			rprintf(FERROR, "stat %s failed: %s\n",
+				full_fname(fname), strerror(errno));
 			return 0;
 		}
 		st = &st2;
 	}
 
 	if (preserve_times && !S_ISLNK(st->st_mode) &&
-	    st->st_mtime != file->modtime) {
+	    cmp_modtime(st->st_mtime, file->modtime) != 0) {
 		/* don't complain about not setting times on directories
 		   because some filesystems can't do it */
 		if (set_modtime(fname,file->modtime) != 0 &&
 		    !S_ISDIR(st->st_mode)) {
-			rprintf(FERROR,"failed to set times on %s : %s\n",
-				fname,strerror(errno));
+			rprintf(FERROR, "failed to set times on %s: %s\n",
+				full_fname(fname), strerror(errno));
 			return 0;
 		} else {
 			updated = 1;
 		}
 	}
 
-	if ((am_root || !am_daemon) &&
-	    ((am_root && preserve_uid && st->st_uid != file->uid) || 
-	     (preserve_gid && st->st_gid != file->gid))) {
+	change_uid = am_root && preserve_uid && st->st_uid != file->uid;
+	change_gid = preserve_gid && file->gid != (gid_t) -1 && \
+				st->st_gid != file->gid;
+	if (change_gid && !am_root) {
+		/* enforce bsd-style group semantics: non-root can only
+		    change to groups that the user is a member of */
+		change_gid = is_in_group(file->gid);
+	}
+	if (change_uid || change_gid) {
 		if (do_lchown(fname,
-			      (am_root&&preserve_uid)?file->uid:-1,
-			      preserve_gid?file->gid:-1) != 0) {
-			if (preserve_uid && st->st_uid != file->uid)
-				updated = 1;
-			if (verbose>1 || preserve_uid) {
-				rprintf(FERROR,"chown %s : %s\n",
-					fname,strerror(errno));
-				return 0;
-			}
-		} else {
-			updated = 1;
+			      change_uid?file->uid:st->st_uid,
+			      change_gid?file->gid:st->st_gid) != 0) {
+			/* shouldn't have attempted to change uid or gid
+			     unless have the privilege */
+			rprintf(FERROR, "chown %s failed: %s\n",
+				full_fname(fname), strerror(errno));
+			return 0;
+		}
+		/* a lchown had been done - we have to re-stat if the
+                   destination had the setuid or setgid bits set due
+                   to the side effect of the chown call */
+		if (st->st_mode & (S_ISUID | S_ISGID)) {
+			link_stat(fname, st);
 		}
+		updated = 1;
 	}
 
 #ifdef HAVE_CHMOD
-	if (preserve_perms && !S_ISLNK(st->st_mode) &&
-	    (st->st_mode != file->mode || 
-	     (updated && (file->mode & ~ACCESSPERMS)))) {
-		updated = 1;
-		if (do_chmod(fname,file->mode) != 0) {
-			rprintf(FERROR,"failed to set permissions on %s : %s\n",
-				fname,strerror(errno));
-			return 0;
+	if (!S_ISLNK(st->st_mode)) {
+		if ((st->st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) {
+			updated = 1;
+			if (do_chmod(fname,(file->mode & CHMOD_BITS)) != 0) {
+				rprintf(FERROR, "failed to set permissions on %s: %s\n",
+					full_fname(fname), strerror(errno));
+				return 0;
+			}
 		}
 	}
 #endif
-    
+
 	if (verbose > 1 && report) {
 		if (updated)
 			rprintf(FINFO,"%s\n",fname);
@@ -188,7 +237,7 @@ int set_perms(char *fname,struct file_struct *file,STRUCT_STAT *st,
 
 void sig_int(void)
 {
-	exit_cleanup(1);
+	exit_cleanup(RERR_SIGNAL);
 }
 
 
@@ -196,40 +245,27 @@ void sig_int(void)
    and ownership */
 void finish_transfer(char *fname, char *fnametmp, struct file_struct *file)
 {
-	if (make_backups) {
-		char fnamebak[MAXPATHLEN];
-		if (strlen(fname) + strlen(backup_suffix) > (MAXPATHLEN-1)) {
-			rprintf(FERROR,"backup filename too long\n");
-			return;
-		}
-		slprintf(fnamebak,sizeof(fnamebak)-1,"%s%s",fname,backup_suffix);
-		if (do_rename(fname,fnamebak) != 0 && errno != ENOENT) {
-			rprintf(FERROR,"rename %s %s : %s\n",fname,fnamebak,strerror(errno));
-			return;
-		}
-	}
+	if (make_backups && !make_backup(fname))
+		return;
 
 	/* move tmp file over real file */
-	if (do_rename(fnametmp,fname) != 0) {
+	if (robust_rename(fnametmp,fname) != 0) {
 		if (errno == EXDEV) {
-			/* rename failed on cross-filesystem link.  
+			/* rename failed on cross-filesystem link.
 			   Copy the file instead. */
-			if (copy_file(fnametmp,fname, file->mode & ACCESSPERMS)) {
-				rprintf(FERROR,"copy %s -> %s : %s\n",
-					fnametmp,fname,strerror(errno));
+			if (copy_file(fnametmp,fname, file->mode & INITACCESSPERMS)) {
+				rprintf(FERROR, "copy %s -> \"%s\": %s\n",
+					full_fname(fnametmp), fname,
+					strerror(errno));
 			} else {
 				set_perms(fname,file,NULL,0);
 			}
-			do_unlink(fnametmp);
 		} else {
-			rprintf(FERROR,"rename %s -> %s : %s\n",
-				fnametmp,fname,strerror(errno));
-			do_unlink(fnametmp);
+			rprintf(FERROR,"rename %s -> \"%s\": %s\n",
+				full_fname(fnametmp), fname, strerror(errno));
 		}
+		do_unlink(fnametmp);
 	} else {
 		set_perms(fname,file,NULL,0);
 	}
 }
-
-
-