X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/91c4da3fda9862fa95d4aaea0a328a827e93073b..76c21947140b90edaa5591c63b10ca00f939ad9b:/flist.c

diff --git a/flist.c b/flist.c
index cd5aa149..f905fb87 100644
--- a/flist.c
+++ b/flist.c
@@ -57,14 +57,17 @@ extern int relative_paths;
 extern int implied_dirs;
 extern int copy_links;
 extern int copy_unsafe_links;
-extern int remote_version;
-extern int io_error;
+extern int protocol_version;
 extern int sanitize_paths;
 
 extern int read_batch;
 extern int write_batch;
 
-static struct exclude_struct **local_exclude_list;
+extern struct exclude_struct **exclude_list;
+extern struct exclude_struct **server_exclude_list;
+extern struct exclude_struct **local_exclude_list;
+
+int io_error;
 
 static struct file_struct null_file;
 
@@ -121,10 +124,10 @@ static struct string_area *string_area_new(int size)
 
 	if (size <= 0)
 		size = ARENA_SIZE;
-	a = malloc(sizeof(*a));
+	a = new(struct string_area);
 	if (!a)
 		out_of_memory("string_area_new");
-	a->current = a->base = malloc(size);
+	a->current = a->base = new_array(char, size);
 	if (!a->current)
 		out_of_memory("string_area_new buffer");
 	a->end = a->base + size;
@@ -250,20 +253,37 @@ int link_stat(const char *path, STRUCT_STAT * buffer)
 }
 
 /*
-  This function is used to check if a file should be included/excluded
-  from the list of files based on its name and type etc
+ * This function is used to check if a file should be included/excluded
+ * from the list of files based on its name and type etc.  The value of
+ * exclude_level is set to either SERVER_EXCLUDES or ALL_EXCLUDES.
  */
-static int check_exclude_file(int f, char *fname, STRUCT_STAT * st)
+static int check_exclude_file(char *fname, int is_dir, int exclude_level)
 {
-	extern int delete_excluded;
-
-	/* f is set to -1 when calculating deletion file list */
-	if ((f == -1) && delete_excluded) {
+#if 0 /* This currently never happens, so avoid a useless compare. */
+	if (exclude_level == NO_EXCLUDES)
 		return 0;
+#endif
+	if (fname) {
+		/* never exclude '.', even if somebody does --exclude '*' */
+		if (fname[0] == '.' && !fname[1])
+			return 0;
+		/* Handle the -R version of the '.' dir. */
+		if (fname[0] == '/') {
+			int len = strlen(fname);
+			if (fname[len-1] == '.' && fname[len-2] == '/')
+				return 0;
+		}
 	}
-	if (check_exclude(fname, local_exclude_list, st)) {
+	if (server_exclude_list
+	 && check_exclude(server_exclude_list, fname, is_dir))
+		return 1;
+	if (exclude_level != ALL_EXCLUDES)
+		return 0;
+	if (exclude_list && check_exclude(exclude_list, fname, is_dir))
+		return 1;
+	if (local_exclude_list
+	 && check_exclude(local_exclude_list, fname, is_dir))
 		return 1;
-	}
 	return 0;
 }
 
@@ -308,7 +328,6 @@ static char *flist_dir;
 static void flist_expand(struct file_list *flist)
 {
 	if (flist->count >= flist->malloced) {
-		size_t new_bytes;
 		void *new_ptr;
 
 		if (flist->malloced < 1000)
@@ -316,16 +335,19 @@ static void flist_expand(struct file_list *flist)
 		else
 			flist->malloced *= 2;
 
-		new_bytes = sizeof(flist->files[0]) * flist->malloced;
-
-		if (flist->files)
-			new_ptr = realloc(flist->files, new_bytes);
-		else
-			new_ptr = malloc(new_bytes);
+		if (flist->files) {
+			new_ptr = realloc_array(flist->files,
+						struct file_struct *,
+						flist->malloced);
+		} else {
+			new_ptr = new_array(struct file_struct *,
+					    flist->malloced);
+		}
 
 		if (verbose >= 2) {
 			rprintf(FINFO, "expand file_list to %.0f bytes, did%s move\n",
-				(double) new_bytes,
+				(double)sizeof(flist->files[0])
+				* flist->malloced,
 				(new_ptr == flist->files) ? " not" : "");
 		}
 
@@ -347,7 +369,7 @@ static void send_file_entry(struct file_struct *file, int f,
 	static uid_t last_uid;
 	static gid_t last_gid;
 	static char lastname[MAXPATHLEN];
-	char *fname;
+	char *fname, buf[MAXPATHLEN];
 	int l1, l2;
 
 	if (f == -1)
@@ -360,7 +382,7 @@ static void send_file_entry(struct file_struct *file, int f,
 
 	io_write_phase = "send_file_entry";
 
-	fname = f_name(file);
+	fname = f_name_to(file, buf, sizeof buf);
 
 	flags = base_flags;
 
@@ -427,7 +449,7 @@ static void send_file_entry(struct file_struct *file, int f,
 
 #if SUPPORT_HARD_LINKS
 	if (preserve_hard_links && S_ISREG(file->mode)) {
-		if (remote_version < 26) {
+		if (protocol_version < 26) {
 			/* 32-bit dev_t and ino_t */
 			write_int(f, (int) file->dev);
 			write_int(f, (int) file->inode);
@@ -440,7 +462,7 @@ static void send_file_entry(struct file_struct *file, int f,
 #endif
 
 	if (always_checksum) {
-		if (remote_version < 21) {
+		if (protocol_version < 21) {
 			write_buf(f, file->sum, 2);
 		} else {
 			write_buf(f, file->sum, MD4_SUM_LENGTH);
@@ -483,7 +505,7 @@ static void receive_file_entry(struct file_struct **fptr,
 	else
 		l2 = read_byte(f);
 
-	file = (struct file_struct *) malloc(sizeof(*file));
+	file = new(struct file_struct);
 	if (!file)
 		out_of_memory("receive_file_entry");
 	memset((char *) file, 0, sizeof(*file));
@@ -550,7 +572,7 @@ static void receive_file_entry(struct file_struct **fptr,
 			rprintf(FERROR, "overflow: l=%d\n", l);
 			overflow("receive_file_entry");
 		}
-		file->link = (char *) malloc(l + 1);
+		file->link = new_array(char, l + 1);
 		if (!file->link)
 			out_of_memory("receive_file_entry 2");
 		read_sbuf(f, file->link, l);
@@ -560,7 +582,7 @@ static void receive_file_entry(struct file_struct **fptr,
 	}
 #if SUPPORT_HARD_LINKS
 	if (preserve_hard_links && S_ISREG(file->mode)) {
-		if (remote_version < 26) {
+		if (protocol_version < 26) {
 			file->dev = read_int(f);
 			file->inode = read_int(f);
 		} else {
@@ -571,10 +593,10 @@ static void receive_file_entry(struct file_struct **fptr,
 #endif
 
 	if (always_checksum) {
-		file->sum = (char *) malloc(MD4_SUM_LENGTH);
+		file->sum = new_array(char, MD4_SUM_LENGTH);
 		if (!file->sum)
 			out_of_memory("md4 sum");
-		if (remote_version < 21) {
+		if (protocol_version < 21) {
 			read_buf(f, file->sum, 2);
 		} else {
 			read_buf(f, file->sum, MD4_SUM_LENGTH);
@@ -641,8 +663,8 @@ static int skip_filesystem(char *fname, STRUCT_STAT * st)
  * statting directories if we're not recursing, but this is not a very
  * important case.  Some systems may not have d_type.
  **/
-struct file_struct *make_file(int f, char *fname, struct string_area **ap,
-			      int noexcludes)
+struct file_struct *make_file(char *fname, struct string_area **ap,
+			      int exclude_level)
 {
 	struct file_struct *file;
 	STRUCT_STAT st;
@@ -664,24 +686,23 @@ struct file_struct *make_file(int f, char *fname, struct string_area **ap,
 
 	if (readlink_stat(fname, &st, linkbuf) != 0) {
 		int save_errno = errno;
-		if ((errno == ENOENT) && !noexcludes) {
+		if (errno == ENOENT && exclude_level != NO_EXCLUDES) {
 			/* either symlink pointing nowhere or file that
 			 * was removed during rsync run; see if excluded
 			 * before reporting an error */
-			memset((char *) &st, 0, sizeof(st));
-			if (check_exclude_file(f, fname, &st)) {
+			if (check_exclude_file(fname, 0, exclude_level)) {
 				/* file is excluded anyway, ignore silently */
 				return NULL;
 			}
 		}
-		io_error = 1;
-		rprintf(FERROR, "readlink %s: %s\n",
-			fname, strerror(save_errno));
+		io_error |= IOERR_GENERAL;
+		rprintf(FERROR, "readlink %s failed: %s\n",
+			full_fname(fname), strerror(save_errno));
 		return NULL;
 	}
 
-	/* we use noexcludes from backup.c */
-	if (noexcludes)
+	/* backup.c calls us with exclude_level set to NO_EXCLUDES. */
+	if (exclude_level == NO_EXCLUDES)
 		goto skip_excludes;
 
 	if (S_ISDIR(st.st_mode) && !recurse && !files_from) {
@@ -694,19 +715,18 @@ struct file_struct *make_file(int f, char *fname, struct string_area **ap,
 			return NULL;
 	}
 
-	if (check_exclude_file(f, fname, &st))
+	if (check_exclude_file(fname, S_ISDIR(st.st_mode) != 0, exclude_level))
 		return NULL;
 
-
 	if (lp_ignore_nonreadable(module_id) && access(fname, R_OK) != 0)
 		return NULL;
 
       skip_excludes:
 
 	if (verbose > 2)
-		rprintf(FINFO, "make_file(%d,%s)\n", f, fname);
+		rprintf(FINFO, "make_file(%s,*,%d)\n", fname, exclude_level);
 
-	file = (struct file_struct *) malloc(sizeof(*file));
+	file = new(struct file_struct);
 	if (!file)
 		out_of_memory("make_file");
 	memset((char *) file, 0, sizeof(*file));
@@ -777,13 +797,17 @@ struct file_struct *make_file(int f, char *fname, struct string_area **ap,
 }
 
 
-
 void send_file_name(int f, struct file_list *flist, char *fname,
 		    int recursive, unsigned base_flags)
 {
 	struct file_struct *file;
+	char buf[MAXPATHLEN];
+	extern int delete_excluded;
 
-	file = make_file(f, fname, &flist->string_area, 0);
+	/* f is set to -1 when calculating deletion file list */
+	file = make_file(fname, &flist->string_area,
+			 f == -1 && delete_excluded? SERVER_EXCLUDES
+						   : ALL_EXCLUDES);
 
 	if (!file)
 		return;
@@ -792,10 +816,10 @@ void send_file_name(int f, struct file_list *flist, char *fname,
 
 	flist_expand(flist);
 
-	if (write_batch)	/*  dw  */
+	if (write_batch)
 		file->flags = FLAG_DELETE;
 
-	if (strcmp(file->basename, "")) {
+	if (file->basename[0]) {
 		flist->files[flist->count++] = file;
 		send_file_entry(file, f, base_flags);
 	}
@@ -803,14 +827,13 @@ void send_file_name(int f, struct file_list *flist, char *fname,
 	if (S_ISDIR(file->mode) && recursive) {
 		struct exclude_struct **last_exclude_list =
 		    local_exclude_list;
-		send_directory(f, flist, f_name(file));
+		send_directory(f, flist, f_name_to(file, buf, sizeof buf));
 		local_exclude_list = last_exclude_list;
 		return;
 	}
 }
 
 
-
 static void send_directory(int f, struct file_list *flist, char *dir)
 {
 	DIR *d;
@@ -821,8 +844,9 @@ static void send_directory(int f, struct file_list *flist, char *dir)
 
 	d = opendir(dir);
 	if (!d) {
-		io_error = 1;
-		rprintf(FERROR, "opendir(%s): %s\n", dir, strerror(errno));
+		io_error |= IOERR_GENERAL;
+		rprintf(FERROR, "opendir %s failed: %s\n",
+			full_fname(dir), strerror(errno));
 		return;
 	}
 
@@ -830,10 +854,9 @@ static void send_directory(int f, struct file_list *flist, char *dir)
 	l = strlen(fname);
 	if (fname[l - 1] != '/') {
 		if (l == MAXPATHLEN - 1) {
-			io_error = 1;
-			rprintf(FERROR,
-				"skipping long-named directory %s\n",
-				fname);
+			io_error |= IOERR_GENERAL;
+			rprintf(FERROR, "skipping long-named directory: %s\n",
+				full_fname(fname));
 			closedir(d);
 			return;
 		}
@@ -847,36 +870,41 @@ static void send_directory(int f, struct file_list *flist, char *dir)
 	if (cvs_exclude) {
 		if (strlen(fname) + strlen(".cvsignore") <= MAXPATHLEN - 1) {
 			strcpy(p, ".cvsignore");
-			local_exclude_list =
-			    make_exclude_list(fname, NULL, 0, 0);
+			add_exclude_file(&exclude_list,fname,MISSING_OK,ADD_EXCLUDE);
 		} else {
-			io_error = 1;
+			io_error |= IOERR_GENERAL;
 			rprintf(FINFO,
 				"cannot cvs-exclude in long-named directory %s\n",
-				fname);
+				full_fname(fname));
 		}
 	}
 
-	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 (dname[0] == '.' && (dname[1] == '\0'
+		    || (dname[1] == '.' && dname[2] == '\0')))
 			continue;
 		strlcpy(p, dname, MAXPATHLEN - l);
 		send_file_name(f, flist, fname, recurse, 0);
 	}
-
-	if (local_exclude_list) {
-		add_exclude_list("!", &local_exclude_list, 0);
+	if (errno) {
+		io_error |= IOERR_GENERAL;
+		rprintf(FERROR, "readdir(%s): (%d) %s\n",
+		    dir, errno, strerror(errno));
 	}
 
+	if (local_exclude_list)
+		free_exclude_list(&local_exclude_list); /* Zeros pointer too */
+
 	closedir(d);
 }
 
 
 /**
- *
- * I <b>think</b> f==-1 means that the list should just be built in
- * memory and not transmitted.  But who can tell? -- mbp
+ * The delete_files() function in receiver.c sets f to -1 so that we just
+ * construct the file list in memory without sending it over the wire.  It
+ * also has the side-effect of ignoring user-excludes if delete_excluded
+ * is set (so that the delete list includes user-excluded files).
  **/
 struct file_list *send_file_list(int f, int argc, char *argv[])
 {
@@ -896,11 +924,11 @@ struct file_list *send_file_list(int f, int argc, char *argv[])
 	flist = flist_new();
 
 	if (f != -1) {
-		io_start_buffering(f);
+		io_start_buffering_out(f);
 		if (filesfrom_fd >= 0) {
 			if (argv[0] && !push_dir(argv[0], 0)) {
-				rprintf(FERROR, "push_dir %s : %s\n",
-					argv[0], strerror(errno));
+				rprintf(FERROR, "push_dir %s failed: %s\n",
+					full_fname(argv[0]), strerror(errno));
 				exit_cleanup(RERR_FILESELECT);
 			}
 			use_ff_fd = 1;
@@ -924,14 +952,10 @@ struct file_list *send_file_list(int f, int argc, char *argv[])
 		}
 
 		l = strlen(fname);
-		if (l != 1 && fname[l - 1] == '/') {
-			if ((l == 2) && (fname[0] == '.')) {
-				/*  Turn ./ into just . rather than ./.
-				   This was put in to avoid a problem with
-				   rsync -aR --delete from ./
-				   The send_file_name() below of ./ was
-				   mysteriously preventing deletes */
-				fname[1] = 0;
+		if (fname[l - 1] == '/') {
+			if (l == 2 && fname[0] == '.') {
+				/* Turn "./" into just "." rather than "./." */
+				fname[1] = '\0';
 			} else {
 				strlcat(fname, ".", MAXPATHLEN);
 			}
@@ -939,9 +963,9 @@ struct file_list *send_file_list(int f, int argc, char *argv[])
 
 		if (link_stat(fname, &st) != 0) {
 			if (f != -1) {
-				io_error = 1;
-				rprintf(FERROR, "link_stat %s : %s\n",
-					fname, strerror(errno));
+				io_error |= IOERR_GENERAL;
+				rprintf(FERROR, "link_stat %s failed: %s\n",
+					full_fname(fname), strerror(errno));
 			}
 			continue;
 		}
@@ -1006,9 +1030,9 @@ struct file_list *send_file_list(int f, int argc, char *argv[])
 			olddir = push_dir(dir, 1);
 
 			if (!olddir) {
-				io_error = 1;
-				rprintf(FERROR, "push_dir %s : %s\n",
-					dir, strerror(errno));
+				io_error |= IOERR_GENERAL;
+				rprintf(FERROR, "push_dir %s failed: %s\n",
+					full_fname(dir), strerror(errno));
 				continue;
 			}
 
@@ -1023,8 +1047,8 @@ struct file_list *send_file_list(int f, int argc, char *argv[])
 		if (olddir != NULL) {
 			flist_dir = NULL;
 			if (pop_dir(olddir) != 0) {
-				rprintf(FERROR, "pop_dir %s : %s\n",
-					dir, strerror(errno));
+				rprintf(FERROR, "pop_dir %s failed: %s\n",
+					full_fname(dir), strerror(errno));
 				exit_cleanup(RERR_FILESELECT);
 			}
 		}
@@ -1056,7 +1080,7 @@ struct file_list *send_file_list(int f, int argc, char *argv[])
 		io_end_buffering();
 		stats.flist_size = stats.total_written - start_write;
 		stats.num_files = flist->count;
-		if (write_batch)	/*  dw  */
+		if (write_batch)
 			write_batch_flist_info(flist->count, flist->files);
 	}
 
@@ -1079,15 +1103,13 @@ struct file_list *recv_file_list(int f)
 
 	start_read = stats.total_read;
 
-	flist = (struct file_list *) malloc(sizeof(flist[0]));
+	flist = new(struct file_list);
 	if (!flist)
 		goto oom;
 
 	flist->count = 0;
 	flist->malloced = 1000;
-	flist->files =
-	    (struct file_struct **) malloc(sizeof(flist->files[0]) *
-					   flist->malloced);
+	flist->files = new_array(struct file_struct *, flist->malloced);
 	if (!flist->files)
 		goto oom;
 
@@ -1106,9 +1128,10 @@ struct file_list *recv_file_list(int f)
 
 		maybe_emit_filelist_progress(flist);
 
-		if (verbose > 2)
+		if (verbose > 2) {
 			rprintf(FINFO, "recv_file_name(%s)\n",
 				f_name(flist->files[i]));
+		}
 	}
 
 
@@ -1159,10 +1182,6 @@ struct file_list *recv_file_list(int f)
 }
 
 
-/*
- * XXX: This is currently the hottest function while building the file
- * list, because building f_name()s every time is expensive.
- **/
 int file_compare(struct file_struct **f1, struct file_struct **f2)
 {
 	if (!(*f1)->basename && !(*f2)->basename)
@@ -1173,7 +1192,7 @@ int file_compare(struct file_struct **f1, struct file_struct **f2)
 		return 1;
 	if ((*f1)->dirname == (*f2)->dirname)
 		return u_strcmp((*f1)->basename, (*f2)->basename);
-	return u_strcmp(f_name(*f1), f_name(*f2));
+	return f_name_cmp(*f1, *f2);
 }
 
 
@@ -1229,7 +1248,7 @@ struct file_list *flist_new(void)
 {
 	struct file_list *flist;
 
-	flist = (struct file_list *) malloc(sizeof(flist[0]));
+	flist = new(struct file_list);
 	if (!flist)
 		out_of_memory("send_file_list");
 
@@ -1276,8 +1295,7 @@ void flist_free(struct file_list *flist)
  */
 static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
 {
-	int i;
-	char *name, *prev_name = NULL;
+	int i, prev_i = 0;
 
 	if (!flist || flist->count == 0)
 		return;
@@ -1287,20 +1305,24 @@ static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
 
 	for (i = no_dups? 0 : flist->count; i < flist->count; i++) {
 		if (flist->files[i]->basename) {
-			prev_name = f_name(flist->files[i]);
+			prev_i = i;
 			break;
 		}
 	}
 	while (++i < flist->count) {
 		if (!flist->files[i]->basename)
 			continue;
-		name = f_name(flist->files[i]);
-		if (strcmp(name, prev_name) == 0) {
+		if (f_name_cmp(flist->files[i], flist->files[prev_i]) == 0) {
 			if (verbose > 1 && !am_server) {
 				rprintf(FINFO,
 					"removing duplicate name %s from file list %d\n",
-					name, i);
+					f_name(flist->files[i]), i);
 			}
+			/* Make sure that if we unduplicate '.', that we don't
+			 * lose track of a user-specified starting point (or
+			 * else deletions will mysteriously fail with -R). */
+			if (flist->files[i]->flags & FLAG_DELETE)
+				flist->files[prev_i]->flags |= FLAG_DELETE;
 			/* it's not great that the flist knows the semantics of
 			 * the file memory usage, but i'd rather not add a flag
 			 * byte to that struct.
@@ -1310,7 +1332,8 @@ static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
 			else
 				free_file(flist->files[i]);
 		}
-		prev_name = name;
+		else
+			prev_i = i;
 	}
 
 	if (strip_root) {
@@ -1346,33 +1369,100 @@ static void clean_flist(struct file_list *flist, int strip_root, int no_dups)
 }
 
 
-/*
- * return the full filename of a flist entry
- *
- * This function is too expensive at the moment, because it copies
- * strings when often we only want to compare them.  In any case,
- * using strlcat is silly because it will walk the string repeatedly.
+enum fnc_state { fnc_DIR, fnc_SLASH, fnc_BASE };
+
+/* Compare the names of two file_struct entities, just like strcmp()
+ * would do if it were operating on the joined strings.  We assume
+ * that there are no 0-length strings.
  */
-char *f_name(struct file_struct *f)
+int f_name_cmp(struct file_struct *f1, struct file_struct *f2)
 {
-	static char names[10][MAXPATHLEN];
-	static int n;
-	char *p = names[n];
+	int dif;
+	const uchar *c1, *c2;
+	enum fnc_state state1 = fnc_DIR, state2 = fnc_DIR;
 
+	if (!f1 || !f1->basename) {
+		if (!f2 || !f2->basename)
+			return 0;
+		return -1;
+	}
+	if (!f2 || !f2->basename)
+		return 1;
+
+	if (!(c1 = f1->dirname)) {
+		state1 = fnc_BASE;
+		c1 = f1->basename;
+	}
+	if (!(c2 = f2->dirname)) {
+		state2 = fnc_BASE;
+		c2 = f2->basename;
+	}
+
+	while (1) {
+		if ((dif = (int)*c1 - (int)*c2) != 0)
+			break;
+		if (!*++c1) {
+			switch (state1) {
+			case fnc_DIR:
+				state1 = fnc_SLASH;
+				c1 = "/";
+				break;
+			case fnc_SLASH:
+				state1 = fnc_BASE;
+				c1 = f1->basename;
+				break;
+			case fnc_BASE:
+				break;
+			}
+		}
+		if (!*++c2) {
+			switch (state2) {
+			case fnc_DIR:
+				state2 = fnc_SLASH;
+				c2 = "/";
+				break;
+			case fnc_SLASH:
+				state2 = fnc_BASE;
+				c2 = f2->basename;
+				break;
+			case fnc_BASE:
+				if (!*c1)
+					return 0;
+				break;
+			}
+		}
+	}
+
+	return dif;
+}
+
+
+/* Return a copy of the full filename of a flist entry, using the indicated
+ * buffer.
+ */
+char *f_name_to(struct file_struct *f, char *buf, int bsize)
+{
 	if (!f || !f->basename)
 		return NULL;
 
-	n = (n + 1) % 10;
-
 	if (f->dirname) {
-		int off;
+		int off = strlcpy(buf, f->dirname, bsize);
+		off += strlcpy(buf + off, "/", bsize - off);
+		strlcpy(buf + off, f->basename, bsize - off);
+	} else
+		strlcpy(buf, f->basename, bsize);
+	return buf;
+}
 
-		off = strlcpy(p, f->dirname, MAXPATHLEN);
-		off += strlcpy(p + off, "/", MAXPATHLEN - off);
-		off += strlcpy(p + off, f->basename, MAXPATHLEN - off);
-	} else {
-		strlcpy(p, f->basename, MAXPATHLEN);
-	}
 
-	return p;
+/* Like f_name_to(), but we rotate through 5 static buffers of our own.
+ */
+char *f_name(struct file_struct *f)
+{
+	static char names[5][MAXPATHLEN];
+	static unsigned int n;
+
+	n = (n + 1) % (sizeof names / sizeof names[0]);
+
+	return f_name_to(f, names[n], sizeof names[0]);
 }