sandbox: Support file truncation with os_open()
At present files are not truncated on writing. This is a useful feature.
Add support for this.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c
index d4d6d78..1d87a53 100644
--- a/arch/sandbox/cpu/os.c
+++ b/arch/sandbox/cpu/os.c
@@ -85,6 +85,8 @@
if (os_flags & OS_O_CREAT)
flags |= O_CREAT;
+ if (os_flags & OS_O_TRUNC)
+ flags |= O_TRUNC;
return open(pathname, flags, 0777);
}
diff --git a/include/os.h b/include/os.h
index 7116f87..9e3a561 100644
--- a/include/os.h
+++ b/include/os.h
@@ -75,6 +75,7 @@
#define OS_O_RDWR 2
#define OS_O_MASK 3 /* Mask for read/write flags */
#define OS_O_CREAT 0100
+#define OS_O_TRUNC 01000
/**
* Access to the OS close() system call