X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/044dc293071c635129afdedad63f30c2d49cd942..b3bf9b9df95137a3a43248be9599d919b04877af:/util.c

diff --git a/util.c b/util.c
index 1fc31069..6e83ed27 100644
--- a/util.c
+++ b/util.c
@@ -4,7 +4,7 @@
  * Copyright (C) 1996-2000 Andrew Tridgell
  * Copyright (C) 1996 Paul Mackerras
  * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
- * Copyright (C) 2003-2007 Wayne Davison
+ * Copyright (C) 2003-2009 Wayne Davison
  *
  * 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
@@ -21,18 +21,20 @@
  */
 
 #include "rsync.h"
+#include "ifuncs.h"
+#include "itypes.h"
+#include "inums.h"
 
-extern int verbose;
 extern int dry_run;
 extern int module_id;
 extern int modify_window;
 extern int relative_paths;
-extern int human_readable;
+extern int preserve_xattrs;
 extern char *module_dir;
 extern unsigned int module_dirlen;
 extern mode_t orig_umask;
 extern char *partial_dir;
-extern struct filter_list_struct server_filter_list;
+extern struct filter_list_struct daemon_filter_list;
 
 int sanitize_paths = 0;
 
@@ -90,9 +92,9 @@ int fd_pair(int fd[2])
 	return ret;
 }
 
-void print_child_argv(char **cmd)
+void print_child_argv(const char *prefix, char **cmd)
 {
-	rprintf(FCLIENT, "opening connection using ");
+	rprintf(FCLIENT, "%s ", prefix);
 	for (; *cmd; cmd++) {
 		/* Look for characters that ought to be quoted.  This
 		* is not a great quoting algorithm, but it's
@@ -128,7 +130,7 @@ int set_modtime(const char *fname, time_t modtime, mode_t mode)
 		return 1;
 #endif
 
-	if (verbose > 2) {
+	if (DEBUG_GTE(TIME, 1)) {
 		rprintf(FINFO, "set modtime of %s to (%ld) %s",
 			fname, (long)modtime,
 			asctime(localtime(&modtime)));
@@ -146,12 +148,13 @@ int set_modtime(const char *fname, time_t modtime, mode_t mode)
 		t[1].tv_usec = 0;
 # ifdef HAVE_LUTIMES
 		if (S_ISLNK(mode)) {
-			lutimes(fname, t);
-			return 0; /* ignore errors */
+			if (lutimes(fname, t) < 0)
+				return errno == ENOSYS ? 1 : -1;
+			return 0;
 		}
 # endif
 		return utimes(fname, t);
-#elif defined HAVE_UTIMBUF
+#elif defined HAVE_STRUCT_UTIMBUF
 		struct utimbuf tbuf;
 		tbuf.actime = time(NULL);
 		tbuf.modtime = modtime;
@@ -260,62 +263,90 @@ static int safe_read(int desc, char *ptr, size_t len)
 	return n_chars;
 }
 
-/** Copy a file.
+/* Copy a file.  If ofd < 0, copy_file unlinks and opens the "dest" file.
+ * Otherwise, it just writes to and closes the provided file descriptor.
+ * In either case, if --xattrs are being preserved, the dest file will
+ * have its xattrs set from the source file.
  *
  * This is used in conjunction with the --temp-dir, --backup, and
  * --copy-dest options. */
-int copy_file(const char *source, const char *dest, mode_t mode)
+int copy_file(const char *source, const char *dest, int ofd,
+	      mode_t mode, int create_bak_dir)
 {
 	int ifd;
-	int ofd;
 	char buf[1024 * 8];
 	int len;   /* Number of bytes read into `buf'. */
 
-	ifd = do_open(source, O_RDONLY, 0);
-	if (ifd == -1) {
-		rsyserr(FERROR, errno, "open %s", full_fname(source));
+	if ((ifd = do_open(source, O_RDONLY, 0)) < 0) {
+		int save_errno = errno;
+		rsyserr(FERROR_XFER, errno, "open %s", full_fname(source));
+		errno = save_errno;
 		return -1;
 	}
 
-	if (robust_unlink(dest) && errno != ENOENT) {
-		rsyserr(FERROR, errno, "unlink %s", full_fname(dest));
-		return -1;
-	}
+	if (ofd < 0) {
+		if (robust_unlink(dest) && errno != ENOENT) {
+			int save_errno = errno;
+			rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest));
+			errno = save_errno;
+			return -1;
+		}
 
-	ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode);
-	if (ofd == -1) {
-		rsyserr(FERROR, errno, "open %s", full_fname(dest));
-		close(ifd);
-		return -1;
+		if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) {
+			int save_errno = errno ? errno : EINVAL; /* 0 paranoia */
+			if (create_bak_dir && errno == ENOENT && make_bak_dir(dest) == 0) {
+				if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0)
+					save_errno = errno ? errno : save_errno;
+				else
+					save_errno = 0;
+			}
+			if (save_errno) {
+				rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(dest));
+				close(ifd);
+				errno = save_errno;
+				return -1;
+			}
+		}
 	}
 
 	while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
 		if (full_write(ofd, buf, len) < 0) {
-			rsyserr(FERROR, errno, "write %s", full_fname(dest));
+			int save_errno = errno;
+			rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest));
 			close(ifd);
 			close(ofd);
+			errno = save_errno;
 			return -1;
 		}
 	}
 
 	if (len < 0) {
-		rsyserr(FERROR, errno, "read %s", full_fname(source));
+		int save_errno = errno;
+		rsyserr(FERROR_XFER, errno, "read %s", full_fname(source));
 		close(ifd);
 		close(ofd);
+		errno = save_errno;
 		return -1;
 	}
 
 	if (close(ifd) < 0) {
-		rsyserr(FINFO, errno, "close failed on %s",
+		rsyserr(FWARNING, errno, "close failed on %s",
 			full_fname(source));
 	}
 
 	if (close(ofd) < 0) {
-		rsyserr(FERROR, errno, "close failed on %s",
+		int save_errno = errno;
+		rsyserr(FERROR_XFER, errno, "close failed on %s",
 			full_fname(dest));
+		errno = save_errno;
 		return -1;
 	}
 
+#ifdef SUPPORT_XATTRS
+	if (preserve_xattrs)
+		copy_xattrs(source, dest);
+#endif
+
 	return 0;
 }
 
@@ -366,8 +397,8 @@ int robust_unlink(const char *fname)
 			counter = 1;
 	} while ((rc = access(path, 0)) == 0 && counter != start);
 
-	if (verbose > 0) {
-		rprintf(FINFO,"renaming %s to %s because of text busy\n",
+	if (INFO_GTE(MISC, 1)) {
+		rprintf(FWARNING, "renaming %s to %s because of text busy\n",
 			fname, path);
 	}
 
@@ -396,17 +427,20 @@ int robust_rename(const char *from, const char *to, const char *partialptr,
 		switch (errno) {
 #ifdef ETXTBSY
 		case ETXTBSY:
-			if (robust_unlink(to) != 0)
+			if (robust_unlink(to) != 0) {
+				errno = ETXTBSY;
 				return -1;
+			}
+			errno = ETXTBSY;
 			break;
 #endif
 		case EXDEV:
 			if (partialptr) {
 				if (!handle_partial_dir(partialptr,PDIR_CREATE))
-					return -1;
+					return -2;
 				to = partialptr;
 			}
-			if (copy_file(from, to, mode) != 0)
+			if (copy_file(from, to, -1, mode, 0) != 0)
 				return -2;
 			do_unlink(from);
 			return 1;
@@ -461,31 +495,27 @@ void kill_all(int sig)
 }
 
 /** Turn a user name into a uid */
-int name_to_uid(const char *name, uid_t *uid)
+int name_to_uid(const char *name, uid_t *uid_p)
 {
 	struct passwd *pass;
 	if (!name || !*name)
 		return 0;
-	pass = getpwnam(name);
-	if (pass) {
-		*uid = pass->pw_uid;
-		return 1;
-	}
-	return 0;
+	if (!(pass = getpwnam(name)))
+		return 0;
+	*uid_p = pass->pw_uid;
+	return 1;
 }
 
 /** Turn a group name into a gid */
-int name_to_gid(const char *name, gid_t *gid)
+int name_to_gid(const char *name, gid_t *gid_p)
 {
 	struct group *grp;
 	if (!name || !*name)
 		return 0;
-	grp = getgrnam(name);
-	if (grp) {
-		*gid = grp->gr_gid;
-		return 1;
-	}
-	return 0;
+	if (!(grp = getgrnam(name)))
+		return 0;
+	*gid_p = grp->gr_gid;
+	return 1;
 }
 
 /** Lock a byte range in a open file */
@@ -502,82 +532,172 @@ int lock_range(int fd, int offset, int len)
 	return fcntl(fd,F_SETLK,&lock) == 0;
 }
 
-static int filter_server_path(char *arg)
-{
-	char *s;
+#define ENSURE_MEMSPACE(buf, type, sz, req) \
+	if ((req) > sz && !(buf = realloc_array(buf, type, sz = MAX(sz * 2, req)))) \
+		out_of_memory("glob_expand")
 
-	if (server_filter_list.head) {
-		for (s = arg; (s = strchr(s, '/')) != NULL; ) {
-			*s = '\0';
-			if (check_filter(&server_filter_list, arg, 1) < 0) {
-				/* We must leave arg truncated! */
-				return 1;
-			}
-			*s++ = '/';
+static inline void call_glob_match(const char *name, int len, int from_glob,
+				   char *arg, int abpos, int fbpos);
+
+static struct glob_data {
+	char *arg_buf, *filt_buf, **argv;
+	int absize, fbsize, maxargs, argc;
+} glob;
+
+static void glob_match(char *arg, int abpos, int fbpos)
+{
+	int len;
+	char *slash;
+
+	while (*arg == '.' && arg[1] == '/') {
+		if (fbpos < 0) {
+			ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, glob.absize);
+			memcpy(glob.filt_buf, glob.arg_buf, abpos + 1);
+			fbpos = abpos;
 		}
+		ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + 3);
+		glob.arg_buf[abpos++] = *arg++;
+		glob.arg_buf[abpos++] = *arg++;
+		glob.arg_buf[abpos] = '\0';
 	}
-	return 0;
+	if ((slash = strchr(arg, '/')) != NULL) {
+		*slash = '\0';
+		len = slash - arg;
+	} else
+		len = strlen(arg);
+	if (strpbrk(arg, "*?[")) {
+		struct dirent *di;
+		DIR *d;
+
+		if (!(d = opendir(abpos ? glob.arg_buf : ".")))
+			return;
+		while ((di = readdir(d)) != NULL) {
+			char *dname = d_name(di);
+			if (dname[0] == '.' && (dname[1] == '\0'
+			  || (dname[1] == '.' && dname[2] == '\0')))
+				continue;
+			if (!wildmatch(arg, dname))
+				continue;
+			call_glob_match(dname, strlen(dname), 1,
+					slash ? arg + len + 1 : NULL,
+					abpos, fbpos);
+		}
+		closedir(d);
+	} else {
+		call_glob_match(arg, len, 0,
+				slash ? arg + len + 1 : NULL,
+				abpos, fbpos);
+	}
+	if (slash)
+		*slash = '/';
 }
 
-void glob_expand(char *s, char ***argv_ptr, int *argc_ptr, int *maxargs_ptr)
+static inline void call_glob_match(const char *name, int len, int from_glob,
+				   char *arg, int abpos, int fbpos)
 {
-	char **argv = *argv_ptr;
-	int argc = *argc_ptr;
-	int maxargs = *maxargs_ptr;
-#if !defined HAVE_GLOB || !defined HAVE_GLOB_H
-	if (argc == maxargs) {
-		maxargs += MAX_ARGS;
-		if (!(argv = realloc_array(argv, char *, maxargs)))
-			out_of_memory("glob_expand");
-		*argv_ptr = argv;
-		*maxargs_ptr = maxargs;
+	char *use_buf;
+
+	ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + len + 2);
+	memcpy(glob.arg_buf + abpos, name, len);
+	abpos += len;
+	glob.arg_buf[abpos] = '\0';
+
+	if (fbpos >= 0) {
+		ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, fbpos + len + 2);
+		memcpy(glob.filt_buf + fbpos, name, len);
+		fbpos += len;
+		glob.filt_buf[fbpos] = '\0';
+		use_buf = glob.filt_buf;
+	} else
+		use_buf = glob.arg_buf;
+
+	if (from_glob || (arg && len)) {
+		STRUCT_STAT st;
+		int is_dir;
+
+		if (do_stat(glob.arg_buf, &st) != 0)
+			return;
+		is_dir = S_ISDIR(st.st_mode) != 0;
+		if (arg && !is_dir)
+			return;
+
+		if (daemon_filter_list.head
+		 && check_filter(&daemon_filter_list, FLOG, use_buf, is_dir) < 0)
+			return;
 	}
-	if (!*s)
-		s = ".";
-	s = argv[argc++] = strdup(s);
-	filter_server_path(s);
-#else
-	glob_t globbuf;
 
-	if (maxargs <= argc)
-		return;
-	if (!*s)
-		s = ".";
+	if (arg) {
+		glob.arg_buf[abpos++] = '/';
+		glob.arg_buf[abpos] = '\0';
+		if (fbpos >= 0) {
+			glob.filt_buf[fbpos++] = '/';
+			glob.filt_buf[fbpos] = '\0';
+		}
+		glob_match(arg, abpos, fbpos);
+	} else {
+		ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
+		if (!(glob.argv[glob.argc++] = strdup(glob.arg_buf)))
+			out_of_memory("glob_match");
+	}
+}
+
+/* This routine performs wild-card expansion of the pathname in "arg".  Any
+ * daemon-excluded files/dirs will not be matched by the wildcards.  Returns 0
+ * if a wild-card string is the only returned item (due to matching nothing). */
+int glob_expand(const char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
+{
+	int ret, save_argc;
+	char *s;
+
+	if (!arg) {
+		if (glob.filt_buf)
+			free(glob.filt_buf);
+		free(glob.arg_buf);
+		memset(&glob, 0, sizeof glob);
+		return -1;
+	}
 
 	if (sanitize_paths)
-		s = sanitize_path(NULL, s, "", 0, NULL);
-	else
-		s = strdup(s);
-	if (!s)
-		out_of_memory("glob_expand");
-
-	memset(&globbuf, 0, sizeof globbuf);
-	if (!filter_server_path(s))
-		glob(s, 0, NULL, &globbuf);
-	if (MAX((int)globbuf.gl_pathc, 1) > maxargs - argc) {
-		maxargs += globbuf.gl_pathc + MAX_ARGS;
-		if (!(argv = realloc_array(argv, char *, maxargs)))
+		s = sanitize_path(NULL, arg, "", 0, SP_KEEP_DOT_DIRS);
+	else {
+		s = strdup(arg);
+		if (!s)
 			out_of_memory("glob_expand");
-		*argv_ptr = argv;
-		*maxargs_ptr = maxargs;
+		clean_fname(s, CFN_KEEP_DOT_DIRS
+			     | CFN_KEEP_TRAILING_SLASH
+			     | CFN_COLLAPSE_DOT_DOT_DIRS);
 	}
-	if (globbuf.gl_pathc == 0)
-		argv[argc++] = s;
-	else {
-		int i;
+
+	ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, MAXPATHLEN);
+	*glob.arg_buf = '\0';
+
+	glob.argc = save_argc = *argc_p;
+	glob.argv = *argv_p;
+	glob.maxargs = *maxargs_p;
+
+	ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, 100);
+
+	glob_match(s, 0, -1);
+
+	/* The arg didn't match anything, so add the failed arg to the list. */
+	if (glob.argc == save_argc) {
+		ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
+		glob.argv[glob.argc++] = s;
+		ret = 0;
+	} else {
 		free(s);
-		for (i = 0; i < (int)globbuf.gl_pathc; i++) {
-			if (!(argv[argc++] = strdup(globbuf.gl_pathv[i])))
-				out_of_memory("glob_expand");
-		}
+		ret = 1;
 	}
-	globfree(&globbuf);
-#endif
-	*argc_ptr = argc;
+
+	*maxargs_p = glob.maxargs;
+	*argv_p = glob.argv;
+	*argc_p = glob.argc;
+
+	return ret;
 }
 
 /* This routine is only used in daemon mode. */
-void glob_expand_module(char *base1, char *arg, char ***argv_ptr, int *argc_ptr, int *maxargs_ptr)
+void glob_expand_module(char *base1, char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
 {
 	char *p, *s;
 	char *base = base1;
@@ -599,7 +719,7 @@ void glob_expand_module(char *base1, char *arg, char ***argv_ptr, int *argc_ptr,
 	for (s = arg; *s; s = p + base_len) {
 		if ((p = strstr(s, base)) != NULL)
 			*p = '\0'; /* split it at this point */
-		glob_expand(s, argv_ptr, argc_ptr, maxargs_ptr);
+		glob_expand(s, argv_p, argc_p, maxargs_p);
 		if (!p)
 			break;
 	}
@@ -686,11 +806,15 @@ int count_dir_elements(const char *p)
 	return cnt;
 }
 
-/* Turns multiple adjacent slashes into a single slash, gets rid of "./"
- * elements (but not a trailing dot dir), removes a trailing slash, and
- * optionally collapses ".." elements (except for those at the start of the
- * string).  If the resulting name would be empty, change it into a ".". */
-unsigned int clean_fname(char *name, BOOL collapse_dot_dot)
+/* Turns multiple adjacent slashes into a single slash (possible exception:
+ * the preserving of two leading slashes at the start), drops all leading or
+ * interior "." elements unless CFN_KEEP_DOT_DIRS is flagged.  Will also drop
+ * a trailing '.' after a '/' if CFN_DROP_TRAILING_DOT_DIR is flagged, removes
+ * a trailing slash (perhaps after removing the aforementioned dot) unless
+ * CFN_KEEP_TRAILING_SLASH is flagged, and will also collapse ".." elements
+ * (except at the start) if CFN_COLLAPSE_DOT_DOT_DIRS is flagged.  If the
+ * resulting name would be empty, returns ".". */
+unsigned int clean_fname(char *name, int flags)
 {
 	char *limit = name - 1, *t = name, *f = name;
 	int anchored;
@@ -698,8 +822,19 @@ unsigned int clean_fname(char *name, BOOL collapse_dot_dot)
 	if (!name)
 		return 0;
 
-	if ((anchored = *f == '/') != 0)
+	if ((anchored = *f == '/') != 0) {
+		*t++ = *f++;
+#ifdef __CYGWIN__
+		/* If there are exactly 2 slashes at the start, preserve
+		 * them.  Would break daemon excludes unless the paths are
+		 * really treated differently, so used this sparingly. */
+		if (*f == '/' && f[1] != '/')
+			*t++ = *f++;
+#endif
+	} else if (flags & CFN_KEEP_DOT_DIRS && *f == '.' && f[1] == '/') {
 		*t++ = *f++;
+		*t++ = *f++;
+	}
 	while (*f) {
 		/* discard extra slashes */
 		if (*f == '/') {
@@ -707,14 +842,16 @@ unsigned int clean_fname(char *name, BOOL collapse_dot_dot)
 			continue;
 		}
 		if (*f == '.') {
-			/* discard "." dirs (but NOT a trailing '.'!) */
-			if (f[1] == '/') {
+			/* discard interior "." dirs */
+			if (f[1] == '/' && !(flags & CFN_KEEP_DOT_DIRS)) {
 				f += 2;
 				continue;
 			}
+			if (f[1] == '\0' && flags & CFN_DROP_TRAILING_DOT_DIR)
+				break;
 			/* collapse ".." dirs */
-			if (collapse_dot_dot
-			    && f[1] == '.' && (f[2] == '/' || !f[2])) {
+			if (flags & CFN_COLLAPSE_DOT_DOT_DIRS
+			 && f[1] == '.' && (f[2] == '/' || !f[2])) {
 				char *s = t - 1;
 				if (s == name && anchored) {
 					f += 2;
@@ -732,7 +869,7 @@ unsigned int clean_fname(char *name, BOOL collapse_dot_dot)
 		while (*f && (*t++ = *f++) != '/') {}
 	}
 
-	if (t > name+anchored && t[-1] == '/')
+	if (t > name+anchored && t[-1] == '/' && !(flags & CFN_KEEP_TRAILING_SLASH))
 		t--;
 	if (t == name)
 		*t++ = '.';
@@ -753,8 +890,7 @@ unsigned int clean_fname(char *name, BOOL collapse_dot_dot)
  * Specify NULL to get the default of "module_dir".
  *
  * The depth var is a count of how many '..'s to allow at the start of the
- * path.  If symlink is set, combine its value with the "p" value to get
- * the target path, and **return NULL if any '..'s try to escape**.
+ * path.
  *
  * We also clean the path in a manner similar to clean_fname() but with a
  * few differences:
@@ -765,15 +901,10 @@ unsigned int clean_fname(char *name, BOOL collapse_dot_dot)
  * string up to "depth" deep).  If the resulting name would be empty,
  * change it into a ".". */
 char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth,
-		    const char *symlink)
+		    int flags)
 {
-	char *start, *sanp, *save_dest = dest;
-	int rlen = 0, leave_one_dotdir = relative_paths;
-
-	if (symlink && *symlink == '/') {
-		p = symlink;
-		symlink = "";
-	}
+	char *start, *sanp;
+	int rlen = 0, drop_dot_dirs = !relative_paths || !(flags & SP_KEEP_DOT_DIRS);
 
 	if (dest != p) {
 		int plen = strlen(p);
@@ -796,32 +927,22 @@ char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth,
 		}
 	}
 
+	if (drop_dot_dirs) {
+		while (*p == '.' && p[1] == '/')
+			p += 2;
+	}
+
 	start = sanp = dest + rlen;
-	while (1) {
-		if (*p == '\0') {
-			if (!symlink || !*symlink)
-				break;
-			while (sanp != start && sanp[-1] != '/') {
-				/* strip last element */
-				sanp--;
-			}
-			/* Append a relative symlink */
-			p = symlink;
-			symlink = "";
-		}
+	/* This loop iterates once per filename component in p, pointing at
+	 * the start of the name (past any prior slash) for each iteration. */
+	while (*p) {
 		/* discard leading or extra slashes */
 		if (*p == '/') {
 			p++;
 			continue;
 		}
-		/* this loop iterates once per filename component in p.
-		 * both p (and sanp if the original had a slash) should
-		 * always be left pointing after a slash
-		 */
-		if (*p == '.' && (p[1] == '/' || p[1] == '\0')) {
-			if (leave_one_dotdir && p[1])
-				leave_one_dotdir = 0;
-			else {
+		if (drop_dot_dirs) {
+			if (*p == '.' && (p[1] == '/' || p[1] == '\0')) {
 				/* skip "." component */
 				p++;
 				continue;
@@ -830,19 +951,12 @@ char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth,
 		if (*p == '.' && p[1] == '.' && (p[2] == '/' || p[2] == '\0')) {
 			/* ".." component followed by slash or end */
 			if (depth <= 0 || sanp != start) {
-				if (symlink && sanp == start) {
-					if (!save_dest)
-						free(dest);
-					return NULL;
-				}
 				p += 2;
 				if (sanp != start) {
 					/* back up sanp one level */
 					--sanp; /* now pointing at slash */
-					while (sanp > start && sanp[-1] != '/') {
-						/* skip back up to slash */
+					while (sanp > start && sanp[-1] != '/')
 						sanp--;
-					}
 				}
 				continue;
 			}
@@ -866,14 +980,17 @@ char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth,
 /* Like chdir(), but it keeps track of the current directory (in the
  * global "curr_dir"), and ensures that the path size doesn't overflow.
  * Also cleans the path using the clean_fname() function. */
-int push_dir(const char *dir, int set_path_only)
+int change_dir(const char *dir, int set_path_only)
 {
 	static int initialised;
 	unsigned int len;
 
 	if (!initialised) {
 		initialised = 1;
-		getcwd(curr_dir, sizeof curr_dir - 1);
+		if (getcwd(curr_dir, sizeof curr_dir - 1) == NULL) {
+			rsyserr(FERROR, errno, "getcwd()");
+			exit_cleanup(RERR_FILESELECT);
+		}
 		curr_dir_len = strlen(curr_dir);
 	}
 
@@ -884,49 +1001,67 @@ int push_dir(const char *dir, int set_path_only)
 	if (len == 1 && *dir == '.')
 		return 1;
 
-	if ((*dir == '/' ? len : curr_dir_len + 1 + len) >= sizeof curr_dir) {
-		errno = ENAMETOOLONG;
-		return 0;
-	}
-
-	if (!set_path_only && chdir(dir))
-		return 0;
-
 	if (*dir == '/') {
+		if (len >= sizeof curr_dir) {
+			errno = ENAMETOOLONG;
+			return 0;
+		}
+		if (!set_path_only && chdir(dir))
+			return 0;
 		memcpy(curr_dir, dir, len + 1);
-		curr_dir_len = len;
 	} else {
-		curr_dir[curr_dir_len++] = '/';
-		memcpy(curr_dir + curr_dir_len, dir, len + 1);
-		curr_dir_len += len;
+		if (curr_dir_len + 1 + len >= sizeof curr_dir) {
+			errno = ENAMETOOLONG;
+			return 0;
+		}
+		curr_dir[curr_dir_len] = '/';
+		memcpy(curr_dir + curr_dir_len + 1, dir, len + 1);
+
+		if (!set_path_only && chdir(curr_dir)) {
+			curr_dir[curr_dir_len] = '\0';
+			return 0;
+		}
 	}
 
-	curr_dir_len = clean_fname(curr_dir, 1);
+	curr_dir_len = clean_fname(curr_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
 	if (sanitize_paths) {
 		if (module_dirlen > curr_dir_len)
 			module_dirlen = curr_dir_len;
 		curr_dir_depth = count_dir_elements(curr_dir + module_dirlen);
 	}
 
+	if (DEBUG_GTE(CHDIR, 1) && !set_path_only)
+		rprintf(FINFO, "[%s] change_dir(%s)\n", who_am_i(), curr_dir);
+
 	return 1;
 }
 
-/**
- * Reverse a push_dir() call.  You must pass in an absolute path
- * that was copied from a prior value of "curr_dir".
- **/
-int pop_dir(const char *dir)
+/* This will make a relative path absolute and clean it up via clean_fname().
+ * Returns the string, which might be newly allocated, or NULL on error. */
+char *normalize_path(char *path, BOOL force_newbuf, unsigned int *len_ptr)
 {
-	if (chdir(dir))
-		return 0;
+	unsigned int len;
 
-	curr_dir_len = strlcpy(curr_dir, dir, sizeof curr_dir);
-	if (curr_dir_len >= sizeof curr_dir)
-		curr_dir_len = sizeof curr_dir - 1;
-	if (sanitize_paths)
-		curr_dir_depth = count_dir_elements(curr_dir + module_dirlen);
+	if (*path != '/') { /* Make path absolute. */
+		int len = strlen(path);
+		if (curr_dir_len + 1 + len >= sizeof curr_dir)
+			return NULL;
+		curr_dir[curr_dir_len] = '/';
+		memcpy(curr_dir + curr_dir_len + 1, path, len + 1);
+		if (!(path = strdup(curr_dir)))
+			out_of_memory("normalize_path");
+		curr_dir[curr_dir_len] = '\0';
+	} else if (force_newbuf) {
+		if (!(path = strdup(path)))
+			out_of_memory("normalize_path");
+	}
 
-	return 1;
+	len = clean_fname(path, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR);
+
+	if (len_ptr)
+		*len_ptr = len;
+
+	return path;
 }
 
 /**
@@ -984,13 +1119,13 @@ char *partial_dir_fname(const char *fname)
 		fn = fname;
 	if ((int)pathjoin(t, sz, partial_dir, fn) >= sz)
 		return NULL;
-	if (server_filter_list.head) {
+	if (daemon_filter_list.head) {
 		t = strrchr(partial_fname, '/');
 		*t = '\0';
-		if (check_filter(&server_filter_list, partial_fname, 1) < 0)
+		if (check_filter(&daemon_filter_list, FLOG, partial_fname, 1) < 0)
 			return NULL;
 		*t = '/';
-		if (check_filter(&server_filter_list, partial_fname, 0) < 0)
+		if (check_filter(&daemon_filter_list, FLOG, partial_fname, 0) < 0)
 			return NULL;
 	}
 
@@ -1016,12 +1151,16 @@ int handle_partial_dir(const char *fname, int create)
 		STRUCT_STAT st;
 		int statret = do_lstat(dir, &st);
 		if (statret == 0 && !S_ISDIR(st.st_mode)) {
-			if (do_unlink(dir) < 0)
+			if (do_unlink(dir) < 0) {
+				*fn = '/';
 				return 0;
+			}
 			statret = -1;
 		}
-		if (statret < 0 && do_mkdir(dir, 0700) < 0)
+		if (statret < 0 && do_mkdir(dir, 0700) < 0) {
+			*fn = '/';
 			return 0;
+		}
 	} else
 		do_rmdir(dir);
 	*fn = '/';
@@ -1093,64 +1232,6 @@ int unsafe_symlink(const char *dest, const char *src)
 	return (depth < 0);
 }
 
-/* Return the int64 number as a string.  If the --human-readable option was
- * specified, we may output the number in K, M, or G units.  We can return
- * up to 4 buffers at a time. */
-char *human_num(int64 num)
-{
-	static char bufs[4][128]; /* more than enough room */
-	static unsigned int n;
-	char *s;
-
-	n = (n + 1) % (sizeof bufs / sizeof bufs[0]);
-
-	if (human_readable) {
-		char units = '\0';
-		int mult = human_readable == 1 ? 1000 : 1024;
-		double dnum = 0;
-		if (num > mult*mult*mult) {
-			dnum = (double)num / (mult*mult*mult);
-			units = 'G';
-		} else if (num > mult*mult) {
-			dnum = (double)num / (mult*mult);
-			units = 'M';
-		} else if (num > mult) {
-			dnum = (double)num / mult;
-			units = 'K';
-		}
-		if (units) {
-			snprintf(bufs[n], sizeof bufs[0], "%.2f%c", dnum, units);
-			return bufs[n];
-		}
-	}
-
-	s = bufs[n] + sizeof bufs[0] - 1;
-	*s = '\0';
-
-	if (!num)
-		*--s = '0';
-	while (num) {
-		*--s = (char)(num % 10) + '0';
-		num /= 10;
-	}
-	return s;
-}
-
-/* Return the double number as a string.  If the --human-readable option was
- * specified, we may output the number in K, M, or G units.  We use a buffer
- * from human_num() to return our result. */
-char *human_dnum(double dnum, int decimal_digits)
-{
-	char *buf = human_num(dnum);
-	int len = strlen(buf);
-	if (isDigit(buf + len - 1)) {
-		/* There's extra room in buf prior to the start of the num. */
-		buf -= decimal_digits + 1;
-		snprintf(buf, len + decimal_digits + 2, "%.*f", decimal_digits, dnum);
-	}
-	return buf;
-}
-
 /* Return the date and time as a string.  Some callers tweak returned buf. */
 char *timestring(time_t t)
 {
@@ -1262,7 +1343,7 @@ void *_new_array(unsigned long num, unsigned int size, int use_calloc)
 	return use_calloc ? calloc(num, size) : malloc(num * size);
 }
 
-void *_realloc_array(void *ptr, unsigned int size, unsigned long num)
+void *_realloc_array(void *ptr, unsigned int size, size_t num)
 {
 	if (num >= MALLOC_MAX/size)
 		return NULL;
@@ -1470,6 +1551,39 @@ int bitbag_next_bit(struct bitbag *bb, int after)
 	return -1;
 }
 
+void flist_ndx_push(flist_ndx_list *lp, int ndx)
+{
+	struct flist_ndx_item *item;
+
+	if (!(item = new(struct flist_ndx_item)))
+		out_of_memory("flist_ndx_push");
+	item->next = NULL;
+	item->ndx = ndx;
+	if (lp->tail)
+		lp->tail->next = item;
+	else
+		lp->head = item;
+	lp->tail = item;
+}
+
+int flist_ndx_pop(flist_ndx_list *lp)
+{
+	struct flist_ndx_item *next;
+	int ndx;
+
+	if (!lp->head)
+		return -1;
+
+	ndx = lp->head->ndx;
+	next = lp->head->next;
+	free(lp->head);
+	lp->head = next;
+	if (!next)
+		lp->tail = NULL;
+
+	return ndx;
+}
+
 void *expand_item_list(item_list *lp, size_t item_size,
 		       const char *desc, int incr)
 {
@@ -1478,15 +1592,18 @@ void *expand_item_list(item_list *lp, size_t item_size,
 		void *new_ptr;
 		size_t new_size = lp->malloced;
 		if (incr < 0)
-			new_size -= incr; /* increase slowly */
+			new_size += -incr; /* increase slowly */
 		else if (new_size < (size_t)incr)
 			new_size += incr;
 		else
 			new_size *= 2;
-		new_ptr = realloc_array(lp->items, char, new_size * item_size);
-		if (verbose >= 4) {
-			rprintf(FINFO, "[%s] expand %s to %.0f bytes, did%s move\n",
-				who_am_i(), desc, (double)new_size * item_size,
+		if (new_size < lp->malloced)
+			overflow_exit("expand_item_list");
+		/* Using _realloc_array() lets us pass the size, not a type. */
+		new_ptr = _realloc_array(lp->items, item_size, new_size);
+		if (DEBUG_GTE(FLIST, 3)) {
+			rprintf(FINFO, "[%s] expand %s to %s bytes, did%s move\n",
+				who_am_i(), desc, big_num(new_size * item_size),
 				new_ptr == lp->items ? " not" : "");
 		}
 		if (!new_ptr)