Check ftruncate result

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@5586 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 17 insertions, 13 deletions

diff --git a/base/shared_memory_posix.cc b/base/shared_memory_posix.cc
index 5f0c05c..579d916 100644
--- a/base/shared_memory_posix.cc
+++ b/base/shared_memory_posix.cc
@@ -60,36 +60,40 @@ bool SharedMemory::Create(const std::wstring &name, bool read_only,
   posix_flags |= read_only ? O_RDONLY : O_RDWR;
   if (!open_existing || mapped_file_ <= 0)
     posix_flags |= O_CREAT;
-  
+
   if (CreateOrOpen(name, posix_flags)) {
-    ftruncate(mapped_file_, size);
-    max_size_ = size;
-    return true;
+    if (0 == ftruncate(mapped_file_, size)) {
+      max_size_ = size;
+      return true;
+    } else {
+      Close();
+      return false;
+    }
   }
-  
+
   return false;
 }
 
 bool SharedMemory::Open(const std::wstring &name, bool read_only) {
   read_only_ = read_only;
-  
+
   int posix_flags = 0;
   posix_flags |= read_only ? O_RDONLY : O_RDWR;
-  
+
   return CreateOrOpen(name, posix_flags);
 }
 
 bool SharedMemory::CreateOrOpen(const std::wstring &name, int posix_flags) {
   DCHECK(mapped_file_ == -1);
-  
+
   name_ = L"/" + name;
-  
+
   mode_t posix_mode = S_IRUSR | S_IWUSR;  // owner read/write
   std::string posix_name(WideToUTF8(name_));
   mapped_file_ = shm_open(posix_name.c_str(), posix_flags, posix_mode);
   if (mapped_file_ < 0)
     return false;
-  
+
   posix_name += kSemaphoreSuffix;
   lock_ = sem_open(posix_name.c_str(), O_CREAT, posix_mode, 1);
   if (lock_ == SEM_FAILED) {
@@ -99,14 +103,14 @@ bool SharedMemory::CreateOrOpen(const std::wstring &name, int posix_flags) {
     lock_ = NULL;
     return false;
   }
-  
+
   return true;
 }
 
 bool SharedMemory::Map(size_t bytes) {
   if (mapped_file_ == -1)
     return false;
-  
+
   memory_ = mmap(NULL, bytes, PROT_READ | (read_only_ ? 0 : PROT_WRITE),
                  MAP_SHARED, mapped_file_, 0);
 
@@ -150,7 +154,7 @@ void SharedMemory::Close() {
     shm_unlink(posix_name.c_str());
     mapped_file_ = -1;
   }
-  
+
   if (lock_) {
     posix_name += kSemaphoreSuffix;
     sem_unlink(posix_name.c_str());