util: add os_file_create_unique()

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/util/os_file.c b/src/util/os_file.c
index 756164c3dfe..ae41506332d 100644
--- a/src/util/os_file.c
+++ b/src/util/os_file.c
@@ -6,7 +6,30 @@
 #include "os_file.h"
 
 #include <errno.h>
+#include <fcntl.h>
 #include <stdlib.h>
+#include <sys/stat.h>
+
+
+#if defined(WIN32)
+#include <io.h>
+#define open _open
+#define fdopen _fdopen
+#define O_CREAT _O_CREAT
+#define O_EXCL _O_EXCL
+#define O_WRONLY _O_WRONLY
+#endif
+
+
+FILE *
+os_file_create_unique(const char *filename, int filemode)
+{
+   int fd = open(filename, O_CREAT | O_EXCL | O_WRONLY, filemode);
+   if (fd == -1)
+      return NULL;
+   return fdopen(fd, "w");
+}
+
 
 #if defined(__linux__)