Fix seriously broken implementation of GetMagicNumber.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18422 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Unix/Path.cpp b/lib/System/Unix/Path.cpp
index 70cc4f0..5d2a4b6 100644
--- a/lib/System/Unix/Path.cpp
+++ b/lib/System/Unix/Path.cpp
@@ -178,11 +178,13 @@
int fd = ::open(path.c_str(),O_RDONLY);
if (fd < 0)
return false;
- if (0 != ::read(fd, buf, len))
+ ssize_t bytes_read = ::read(fd, buf, len);
+ ::close(fd);
+ if (ssize_t(len) != bytes_read) {
+ Magic.clear();
return false;
- close(fd);
- buf[len] = '\0';
- Magic = buf;
+ }
+ Magic.assign(buf,len);
return true;
}