Security-55471.14.4.tar.gz

[apple/security.git] / libsecurity_filedb / lib / AtomicFile.cpp

diff --git a/libsecurity_filedb/lib/AtomicFile.cpp b/libsecurity_filedb/lib/AtomicFile.cpp
index 1c37c4da3b0f422963a684bb5ce8440738dc71ec..7ff71756842fbb383d297196aff532e7a2b4540d 100644 (file)
--- a/libsecurity_filedb/lib/AtomicFile.cpp
+++ b/libsecurity_filedb/lib/AtomicFile.cpp
@@ -72,7 +72,7 @@ AtomicFile::AtomicFile(const std::string &inPath) :
                        // compute the name of the lock file for this file
                        CC_SHA1_CTX ctx;
                        CC_SHA1_Init(&ctx);
-                       CC_SHA1_Update(&ctx, (const void*) mFile.c_str(), mFile.length());
+                       CC_SHA1_Update(&ctx, (const void*) mFile.c_str(), (CC_LONG)mFile.length());
                        u_int8_t digest[CC_SHA1_DIGEST_LENGTH];
                        CC_SHA1_Final(digest, &ctx);
 
@@ -230,54 +230,49 @@ AtomicFile::pathSplit(const std::string &inFull, std::string &outDir, std::strin
        }
 }
 
-static std::string RemoveDoubleSlashes(const std::string &path)
-{
-       std::string result;
-       unsigned i;
-       for (i = 0; i < path.length(); ++i)
-       {
-               result += path[i];
-               if ((i < path.length() - 2) && path[i] == '/' && path[i + 1] == '/')
-               {
-                       i += 1; // skip a second '/'
-               }
-       }
-       
-       return result;
-}
-
-
-
 //
 // Make sure the directory up to inDir exists inDir *must* end in a slash.
 //
 void
 AtomicFile::mkpath(const std::string &inDir, mode_t mode)
 {
-       for (std::string::size_type pos = 0; (pos = inDir.find('/', pos + 1)) != std::string::npos;)
-       {
-               std::string path = inDir.substr(0, pos);
-               const char *cpath = path.c_str();
-               struct stat sb;
-               if (::stat(cpath, &sb))
-               {
-                       // if we are creating a path in the user's home directory, override the user's mode
-                       std::string homedir = getenv("HOME");
-                       
-                       // canonicalize the path (remove double slashes)
-                       string canonPath = RemoveDoubleSlashes(cpath);
-                       
-                       if (canonPath.find(homedir, 0) == 0)
-                       {
-                               mode = 0700;
-                       }
-                       
-                       if (errno != ENOENT || ::mkdir(cpath, mode))
-                               UnixError::throwMe(errno);
-               }
-               else if (!S_ISDIR(sb.st_mode))
-                       CssmError::throwMe(CSSM_ERRCODE_OS_ACCESS_DENIED);  // @@@ Should be is a directory
-       }
+    // see if the file already exists and is a directory
+    struct stat st;
+    int result = stat(inDir.c_str(), &st);
+    
+    if (result == 0) // file exists
+    {
+        if ((st.st_mode & S_IFDIR) == 0)
+        {
+            // whatever was there, it wasn't a directory.  That's really bad, so complain
+            syslog(LOG_ALERT, "Needed a directory at %s, but the file that was there was not one.\n", inDir.c_str());
+            UnixError::throwMe(ENOTDIR);
+        }
+    }
+    else
+    {
+        // the file did not exist, try to create it
+        result = mkpath_np(inDir.c_str(), 0777); // make the directory with umask
+        if (result != 0)
+        {
+            // mkpath_np does not set errno, you have to look at the result.
+            UnixError::throwMe(result);
+        }
+    }
+    
+    // Double check and see if we got what we hoped for
+    result = stat(inDir.c_str(), &st);
+    if (result != 0)
+    {
+        UnixError::throwMe(errno);
+    }
+    
+    if ((st.st_mode & S_IFDIR) == 0)
+    {
+        // we didn't create a dictionary?  That's curious...
+        syslog(LOG_ALERT, "Failed to create a directory when we asked for one to be created at %s\n", inDir.c_str());
+        UnixError::throwMe(ENOTDIR);
+    }
 }
 
 int
@@ -465,7 +460,7 @@ AtomicBufferedFile::unloadBuffer()
        }
        else
        {
-               munmap(mBuffer, mLength);
+               munmap(mBuffer, (size_t)mLength);
        }
 }
 
@@ -483,7 +478,7 @@ AtomicBufferedFile::loadBuffer()
                lseek(mFileRef, 0, SEEK_SET);
                ssize_t pos = 0;
                
-               ssize_t bytesToRead = mLength;
+               ssize_t bytesToRead = (ssize_t)mLength;
                while (bytesToRead > 0)
                {
                        ssize_t bytesRead = ::read(mFileRef, mBuffer + pos, bytesToRead);
@@ -507,7 +502,7 @@ AtomicBufferedFile::loadBuffer()
        else
        {
                // mmap the buffer into place
-               mBuffer = (uint8*) mmap(NULL, mLength, PROT_READ, MAP_PRIVATE, mFileRef, 0);
+               mBuffer = (uint8*) mmap(NULL, (size_t)mLength, PROT_READ, MAP_PRIVATE, mFileRef, 0);
                if (mBuffer == (uint8*) -1)
                {
                        int error = errno;
@@ -546,7 +541,7 @@ AtomicBufferedFile::read(off_t inOffset, off_t inLength, off_t &outLength)
        
        secdebug("atomicfile", "%p allocated %s buffer %p size %qd", this, mPath.c_str(), mBuffer, bytesLeft);
        
-       ssize_t maxEnd = inOffset + inLength;
+       off_t maxEnd = inOffset + inLength;
        if (maxEnd > mLength)
        {
                maxEnd = mLength;
@@ -616,7 +611,7 @@ AtomicTempFile::create(mode_t mode)
     
     // put the dir into a canonical form
     string dir = mFile.dir();
-    int i = dir.length() - 1;
+    int i = (int)dir.length() - 1;
     
     // walk backwards until we get to a non / character
     while (i >= 0 && dir[i] == '/')