more safexx posix stuff

src/utils/conftree.cpp

@@ -172,7 +172,7 @@ ConfSimple::ConfSimple(const char *fname, int readonly, bool tildexp)
 	// It seems that there is no separate 'create if not exists' 
 	// open flag. Have to truncate to create, but dont want to do 
 	// this to an existing file !
-	if (access(fname, 0) < 0) {
+	if (!path_exists(fname)) {
 	    mode |= ios::trunc;
 	}
 	input.open(fname, mode);

src/utils/pathut.cpp

@@ -433,6 +433,11 @@ long long path_filesize(const string& path)
     return (long long)st.st_size;
 }
 
+bool path_exists(const string& path)
+{
+    return access(path.c_str(), 0) == 0;
+}
+
 // Allowed punctuation in the path part of an URI according to RFC2396
 // -_.!~*'():@&=+$,
 /*

src/utils/pathut.h

@@ -18,8 +18,6 @@
 #define _PATHUT_H_INCLUDED_
 #include "autoconfig.h"
 
-#include <unistd.h>
-
 #include <string>
 #include <vector>
 #include <set>
@@ -75,6 +73,11 @@ extern bool path_isdir(const std::string& path);
 /// Retrieve file size
 extern long long path_filesize(const std::string& path);
 
+/// Check that path is traversable and last element exists
+/// Returns true if last elt could be checked to exist. False may mean that
+/// the file/dir does not exist or that an error occurred. 
+extern bool path_exists(const std::string& path);
+
 /// Dump directory
 extern bool readdir(const std::string& dir, std::string& reason, 
 		    std::set<std::string>& entries);