X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/0b515981fcfb4ba60d6f01ab604d11e13b85e48f..e516b69ef67822cbbde7252cdddb1217b4aa5567:/util.c

diff --git a/util.c b/util.c
index b309a8da..75b6e3fc 100644
--- a/util.c
+++ b/util.c
@@ -21,6 +21,7 @@
  */
 
 #include "rsync.h"
+#include "ifuncs.h"
 
 extern int verbose;
 extern int dry_run;
@@ -151,7 +152,7 @@ int set_modtime(const char *fname, time_t modtime, mode_t mode)
 		}
 # endif
 		return utimes(fname, t);
-#elif defined HAVE_UTIMBUF
+#elif defined HAVE_STRUCT_UTIMBUF
 		struct utimbuf tbuf;
 		tbuf.actime = time(NULL);
 		tbuf.modtime = modtime;
@@ -260,33 +261,36 @@ 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.
  *
  * 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) {
+	if ((ifd = do_open(source, O_RDONLY, 0)) < 0) {
 		rsyserr(FERROR, errno, "open %s", full_fname(source));
 		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) {
+			rsyserr(FERROR, errno, "unlink %s", full_fname(dest));
+			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
+		 && (!create_bak_dir || errno != ENOENT || make_bak_dir(dest) < 0
+		  || (ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0)) {
+			rsyserr(FERROR, errno, "open %s", full_fname(dest));
+			close(ifd);
+			return -1;
+		}
 	}
 
 	while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
@@ -406,7 +410,7 @@ int robust_rename(const char *from, const char *to, const char *partialptr,
 					return -1;
 				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;
@@ -686,11 +690,14 @@ 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, drops interior "."
+ * elements, drops an intial "./" unless CFN_KEEP_LEADING_DOT_DIR is flagged,
+ * will even 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, will even collapse ".."
+ * elements (except at the start of the string) if CFN_COLLAPSE_DOT_DOT_DIRS
+ * is flagged.  If the resulting name would be empty, we return ".". */
+unsigned int clean_fname(char *name, int flags)
 {
 	char *limit = name - 1, *t = name, *f = name;
 	int anchored;
@@ -700,6 +707,10 @@ unsigned int clean_fname(char *name, BOOL collapse_dot_dot)
 
 	if ((anchored = *f == '/') != 0)
 		*t++ = *f++;
+	else if (flags & CFN_KEEP_LEADING_DOT_DIR && *f == '.' && f[1] == '/') {
+		*t++ = *f++;
+		*t++ = *f++;
+	}
 	while (*f) {
 		/* discard extra slashes */
 		if (*f == '/') {
@@ -707,14 +718,16 @@ unsigned int clean_fname(char *name, BOOL collapse_dot_dot)
 			continue;
 		}
 		if (*f == '.') {
-			/* discard "." dirs (but NOT a trailing '.'!) */
+			/* discard interior "." dirs */
 			if (f[1] == '/') {
 				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 +745,7 @@ 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++ = '.';
@@ -901,7 +914,7 @@ int push_dir(const char *dir, int set_path_only)
 		curr_dir_len += len;
 	}
 
-	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;